 aerosol generating device, cartridge and aerosol generating system
专利摘要:
AEROSOL GENERATION DEVICE WITH AIR CIRCULATION NOZZLES. An aerosol generating device is presented comprising: a vaporizer for heating an aerosol-forming substrate (115, 415) to form an aerosol; a plurality of air circulation nozzles (121, 421) and at least one air outlet (123, 423). The air circulation nozzles (121, 421) and the air outlet (123, 423) are arranged to define an air circulation path (127, 427) between the air circulation nozzles (121, 421) and the air outlet (123, 423). Each of the air circulation nozzles (121, 421) comprises an opening arranged to direct the air to the proximity in one direction through the surface of the vaporizer, in order to control the particle size in the aerosol. 公开号:BR112014012830B1 申请号:R112014012830-8 申请日:2012-12-05 公开日:2021-03-02 发明作者:Flavien Dubief 申请人:Philip Morris Products S.A.； IPC主号:
专利说明:
[001] The present invention relates to an aerosol generating device for heating an aerosol-forming substrate. Particularly, but not exclusively, the present invention relates to an aerosol generating device electrically operated to heat an aerosol-forming substrate. [002] WO-A-2009/132793 discloses an electrically heated smoke system. A liquid is stored in a liquid storage portion and a capillary wick has a first end that extends into the liquid storage portion for contact with the liquid in it, and a second end that extends out of the storage portion of the liquid. A heating element heats the second end of the capillary wick. The heating element is in the form of an electrical heating element spiraled in electrical connection with a power supply and surrounding the second end of the capillary wick. In use, the heating element can be activated by the user to activate the power supply. The suction in a nozzle by the user causes the air to be drawn into the electrically heated smoke system over the capillary wick and the heating element and subsequently into the user's mouth. [003] It is an objective of the present invention to improve aerosol generation in an aerosol generating device or system. [004] In accordance with an aspect of the invention, an aerosol generating device is presented which comprises: a vaporizer for heating an aerosol-forming substrate; a plurality of air circulation vents and at least one air outlet, the air circulation vents and the air outlet being arranged to define an air circulation route between the air circulation vents and the air outlet; and wherein each of the plurality of air circulation vents comprises an opening arranged to direct the air in the vicinity of the vaporizer, so as to control the particle size in the aerosol. [005] In accordance with another aspect of the invention, a cartridge is provided which comprises: a storage portion for storing an aerosol-forming substrate; a vaporizer to heat the aerosol-forming substrate; a plurality of air circulation vents and at least one air outlet, the air circulation vents and the air outlet being arranged to define an air circulation route between the air circulation vents and the air outlet; wherein each of the plurality of air circulation vents comprises an opening arranged to direct the air towards the vaporizer in order to control the particle size in the aerosol. [006] The aerosol generating device and the cartridge cooperate to provide an aerosol generating system to heat an aerosol-forming substrate. The aerosol-generating cartridge or device may comprise a storage portion for storing the aerosol-forming substrate. The vaporizer can be contained in the aerosol generating device. The vaporizer can also be contained in the cartridge. The plurality of air circulation vents can be provided in the aerosol generating device or the cartridge, or some of the plurality of air circulation vents can be provided in the aerosol generating device and others from the plurality of air circulation vents can be supplied in the cartridge. The air outlet can be provided in the aerosol generating device or the cartridge or, if more than one air outlet is provided, one or more air outlets can be provided in the aerosol generating device and one or more air outlets. air can be supplied in the cartridge. [007] In accordance with another aspect of the invention, an aerosol generation system is presented which comprises: a vaporizer for heating an aerosol-forming substrate; a plurality of air circulation vents and at least one air outlet, the air circulation vents and the air outlet being arranged to define an air circulation route between the air circulation vents and the air outlet; wherein each of the plurality of air circulation vents comprises an opening arranged to direct the air towards the vaporizer in order to control the particle size in the aerosol, where the air circulation vents direct the air towards the proximity. the vaporizer in more than one direction. [008] For all aspects of the invention, the storage portion can be a liquid storage portion. For all aspects of the invention, the aerosol-forming substrate can be a liquid aerosol-forming substrate. The aerosol-forming substrate may contain nicotine. The aerosol-forming substrate can be adsorbed, coated, impregnated or otherwise loaded onto a carrier or support. [009] The aerosol-forming substrate may alternatively be any other species of substrate, for example, a gaseous substrate or a gel substrate or any combination of the various types of substrate. The aerosol forming substrate can be a solid substrate. [0010] The vaporizer of the aerosol generating device or system is arranged to heat the aerosol-forming substrate to form a supersaturated vapor. Supersaturated steam is mixed with and transported in the air circulation from the plurality of air circulation nozzles to the air outlet. The vapor condenses to form an aerosol, which is transported to the air outlet into a user's mouth. The aerosol generating device or cartridge may further comprise an aerosol forming chamber in the air circulation path between the plurality of air circulation nozzles and the air outlet. The aerosol forming chamber can help or facilitate the generation of the aerosol. The aerosol generating device can include the aerosol-forming substrate or can be adapted to receive the aerosol-forming substrate. As known to those skilled in the art, an aerosol is a suspension of solid particles or liquid droplets in a gas, such as air. [0011] Each air circulation vent comprises a small opening, orifice or hole. Each air circulation vent may also comprise a nozzle. The small size of the opening, orifice, or hole results in high-speed air circulation through the air circulation vent or vent or nozzle. This is because the speed of air circulation can be increased by decreasing the cross-sectional area of the air circulation path, in order to take advantage of the Venturi effect. That is, the speed of air circulation increases as the cross-sectional area decreases and air circulation through a restricted cross-section increases in speed. Each air circulation vent or nozzle is arranged to propel, conduct or force air at high speed in the vicinity of the vaporizer. For the cartridge, airflow vents or nozzles direct air to the vaporizer in more than one direction. For the device, air circulation vents or nozzles direct air to the proximity of the vaporizer in more than one direction. High-speed air circulation affects the cooling rate of supersaturated steam, which affects aerosol formation. This in turn affects the average particle size and the aerosol particle size distribution. Preferably, the distance between the air circulation vents or nozzles and the vaporizer is small. This improves the control of the speed of air circulation, since there is little opportunity for the deceleration of incoming air or the formation of complex turbulence patterns in the air circulation. Because air circulation vents or nozzles direct air to the vaporizer in more than one direction, air circulation in the vicinity of the vaporizer is relatively homogeneous. Furthermore, the cooling rate on all sides of the vaporizer is substantially the same, which results in a small particle size distribution of the aerosol. [0012] Thus, the invention provides several advantages. First, the higher cooling rate results in a smaller average droplet size in the aerosol. This results in a better sensory experience for the user. Second, homogeneous air circulation results in a smaller range of particle sizes in the aerosol. This results in a more consistent aerosol, which results in a more consistent user experience. Third, by increasing the cooling rate, the aerosol production process is accelerated. This means that the aerosol generating device and the cartridge can be made smaller, since a reduced length of air circulation is required for the formation of the aerosol. The invention allows all three advantages to be realized. In addition, high-speed air circulation can also reduce the amount of condensation that is capable of forming within the aerosol generating device and cartridge, particularly within the aerosol forming chamber. The formation of condensation can affect the leakage of liquid from the aerosol generating device and cartridge. Thus, an additional advantage of the invention is that it can be used to reduce liquid leakage. [0013] In one embodiment, air circulation vents or nozzles comprise air inlet vents or nozzles. That is to say, air circulation vents or nozzles provide the first duct (farthest upstream) for the ambient air to be drawn into the aerosol or cartridge generating device. In this embodiment, preferably, the length of the air intake vents or nozzles is minimized, so that the ambient air is drawn as directly as possible from outside the aerosol generating device or cartridge to the proximity of the vaporizer. This improves control of the speed of air circulation, since there is little opportunity for slowing air circulation or creating complex turbulence patterns. In this embodiment, preferably, the air intake vents or nozzles are provided in a housing of the aerosol generating device or cartridge. [0014] Alternatively, however, air circulation vents or nozzles may not comprise air inlet vents or nozzles. In this modality, more distant ducts upstream of the air circulation vents or nozzles provide inlets for the ambient air to be drawn into the aerosol or cartridge generating device. Air circulation vents or nozzles simply channel air into the vicinity of the vaporizer at a high speed. This allows speed control in the vicinity of the vaporizer, while also allowing the invention to be compatible with various designs of aerosol generating device or cartridge or system. [0015] In one embodiment, at least one of the air circulation vents or nozzles includes a bypass portion. The curved portion may comprise a curved or angled portion. The bypass portion can be curved. The bypass portion may be provided in one, some or all of the air circulation vents or nozzles. This is particularly advantageous if the air circulation vents or nozzles comprise air inlet vents or nozzles and particularly if the air circulation vents or nozzles are provided in a housing of the aerosol generating device or cartridge. It may then be possible for a user to see the vaporizer or other components in the aerosol generating device or cartridge and potentially access and manipulate the vaporizer or other components. The inclusion of a bypass portion in the air circulation vents or nozzles prevents access to the internal components of the aerosol generating device or cartridge or system. [0016] In one embodiment, air circulation vents or nozzles are arranged when the device is in use with the cartridge to direct the air to the proximity of the vaporizer in a direction across the surface of the vaporizer. This direction of air circulation can be advantageous, as it provides high-speed air circulation, usually in parallel with the surface of the vaporizer. This can increase the speed of the vaporization process. In addition, in some embodiments, this air circulation direction creates a rotating air circulation, that is to say, a twisted, rotating or spiral air circulation in the vicinity of the vaporizer. This has been found to increase the cooling rate, which decreases the average particle size in the aerosol. In addition, if the vaporizer comprises a heater, directing the air through the surface of the vaporizer, rather than directly over the vaporizer, reduces unnecessary cooling of the heater. In one embodiment, the circulation nozzles are arranged to direct the air along a path spaced by a predetermined distance from the surface of the vaporizer instead of directly into the vaporizer. This prevents the high-speed air from significantly cooling the vaporizer, but quickly cools the vapor that has been removed from the vaporizer. This improves the efficiency of the aerosol generating device. [0017] As long as air circulation vents or nozzles direct air at high speed in more than one direction, air can be directed through the surface of the vaporizer in more than one portion of the vaporizer. This increases the likelihood of substantially equal cooling on all sides of the vaporizer, which leads to consistent aerosol formation. This also increases the swirling effect of air circulation, which increases the cooling rate. [0018] Alternatively, air circulation vents or nozzles can be arranged to direct air into the vicinity of the vaporizer directly on the surface of the vaporizer. This direction of air circulation can be directed substantially perpendicular to the surface of the vaporizer. This air circulation direction can be advantageous because it increases the cooling rate, which decreases the average particle size in the aerosol. [0019] As long as air circulation vents or nozzles direct air at high speed in more than one direction, air can be directed over more than one portion of the vaporizer. This increases the cooling rate and also increases the likelihood of substantially equal cooling on all sides of the vaporizer. [0020] Air circulation vents or nozzles can direct air at high speed to the proximity of the vaporizer in any other desired direction or directions. For example, air circulation vents or nozzles can direct air in the longitudinal direction of the aerosol or cartridge generating device. Furthermore, each airflow vent or nozzle can direct the air in its own respective direction. For example, one airflow vent or nozzle can direct air at high speed through the surface of the vaporizer and another airflow vent or nozzle can direct air directly over the surface of the vaporizer. [0021] Any suitable number of air circulation vents or nozzles can be provided. Air circulation vents or nozzles can have any suitable cross-sectional area or diameter that results in the desired air circulation speed in the vicinity of the vaporizer. The cross-sectional area and the diameter of the vents or nozzles will also affect resistance to inhalation. The vents or nozzles may have the same cross-sectional areas and diameters or different. The vents or nozzles may also have any desired cross-sectional shape and the vents or nozzles may have the same or different cross-sectional shapes. Advantageously, each of the air circulation vents has a diameter less than or approximately equal to 0.4 mm. This provides a high speed directed air circulation. In one embodiment, for a circulation rate of 27.5 milliliters per second through the air outlet, the air circulation speed through each of the air circulation vents is between 10 and 30 meters per second. The separation of the air circulation vents or nozzles and the vaporizer can be adjusted according to the desired cooling rate in the aerosol generating device. Separation of the vent or nozzle may also affect resistance to inhalation. The vents or nozzles can be separated from the vaporizer by the same or different distances. Air circulation vents or nozzles can direct air circulation in any direction that results in the desired air circulation patterns in the aerosol or cartridge generating device. Vents or nozzles can direct air circulation in the same or different directions. [0022] Air circulation vents or nozzles can be arranged in any suitable pattern that results in the desired cooling rate. Preferably, air circulation vents or nozzles are arranged symmetrically with respect to the vaporizer. This results in a homogeneous air circulation around the vaporizer, which results in a consistent cooling rate and, therefore, a consistent particle size in the aerosol. Preferably, the air circulation vents or nozzles are arranged symmetrically with respect to the longitudinal axis of the aerosol generating device or cartridge. The vents or nozzles can be arranged in a plurality of sets of vents or nozzles. Each set can be longitudinally spaced from the other sets. However, one, two, three, four or more sets of longitudinally spaced vents or nozzles may be provided and each set may comprise one, two, three, four or more air circulation golden breathers or nozzles. [0023] If air circulation vents or nozzles are provided in an aerosol or cartridge generating device housing, the air circulation vents or nozzles may be spaced at the circumference around the housing. Preferably, the air circulation vents or nozzles are symmetrically spaced around the housing in order to increase the likelihood that the cooling rate will be substantially the same throughout the aerosol and cartridge generating device. The vents or nozzles can be arranged in one or more longitudinally spaced rows along the housing. In one embodiment, two longitudinally spaced sets of air circulation vents or nozzles are provided in the housing and each set comprises three air circulation vents or nozzles symmetrically spaced around the circumference of the housing. [0024] In one embodiment, the aerosol generating device or cartridge further comprises: a liquid storage portion for storing the liquid aerosol forming substrate and an elongated capillary body for transporting the liquid aerosol forming substrate from the storage of the liquid to the vaporizer, the capillary body having a first end extended into the liquid storage portion and a second end opposite the first end, wherein the vaporizer is arranged to heat the liquid aerosol forming substrate at the second end of the capillary body. [0025] In this modality, in use, the liquid is transferred from the storage portion of the liquid by the capillary action from the first end of the capillary body to the second end of the capillary body. The liquid at the second end of the capillary body is vaporized to form the supersaturated vapor. Preferably, the capillary body is in contact with the liquid aerosol-forming substrate in the liquid storage portion. The liquid aerosol-forming substrate has adequate physical properties including, but not limited to surface tension, viscosity, density, thermal conductivity, boiling point and vapor pressure, which allow the liquid to be transported through the capillary body by capillary action . [0026] In this modality, preferably the air circulation vents or nozzles comprise the air inlet vents or nozzles. That is to say, air circulation vents or nozzles provide the first duct (farthest upstream) for the ambient air to be drawn into the aerosol or cartridge generating device. Preferably, the air inlet vents or nozzles are provided in a housing of the aerosol generating device or cartridge. Preferably, the air inlet vents or nozzles are provided in the housing of the aerosol generating device or cartridge in the vicinity of the second end of the capillary and vaporizer body, so that the ambient air is drawn directly from outside the air generating device. aerosol or cartridge for the proximity of the second end of the capillary body and the vaporizer. [0027] In this modality, if the air circulation vents or nozzles are arranged to direct the air towards the proximity of the vaporizer in a direction across the surface of the vaporizer, the air circulation vents or nozzles can be arranged to direct the air. through the surface of the capillary body. This is advantageous since it avoids excessive drying of the capillary body. The elongated capillary body preferably extends along the longitudinal axis of the aerosol generating device. If the aerosol or cartridge generating device or both device and cartridge have a circular cross section, the elongated capillary body preferably extends generally along the central axis of the aerosol or cartridge generating device. In this case, the air direction through the surface of the capillary body can be in a tangential direction relative to the capillary body and the circular cross section of the aerosol or cartridge generating device and the nozzles can be arranged to direct the air along of a trajectory for a predetermined distance from the capillary body at its closest point, that is, in a predetermined position above the surface of the capillary body. The air circulation can be substantially perpendicular to the longitudinal axis. Alternatively, air circulation vents or nozzles can be arranged to direct air through the surface of the vaporizer, but directly over the surface of the capillary body. [0028] In this modality, if the air circulation vents or nozzles are arranged to direct the air to the proximity of the vaporizer directly on the surface of the vaporizer, the air circulation vents or nozzles can be arranged to direct the air directly over the surface of the capillary body. The elongated capillary body preferably extends along the longitudinal axis of the aerosol or cartridge generating device. If the aerosol or cartridge generating device or both device and cartridge have a circular cross section, the elongated capillary body preferably extends generally along the central axis of the aerosol or cartridge generating device. In this case, the air direction directly over the surface of the capillary body can be in a radial direction relative to the capillary body and the circular cross section of the aerosol or cartridge generating device. The air circulation can be substantially perpendicular to the longitudinal axis. Alternatively, air circulation vents or nozzles can be arranged to direct air directly over the surface of the capillary body, but not directly over the vaporizer. For example, air circulation vents or nozzles can direct air directly over a portion of the capillary body adjacent to the vaporizer. This is particularly advantageous if the vaporizer comprises a heater because it reduces the cooling of the heater. [0029] If the air circulation vents or nozzles are provided in an aerosol or cartridge generating device housing, the air circulation vents or nozzles may be spaced at the circumference around the housing. Preferably, air circulation vents or nozzles are symmetrically spaced around the housing in order to increase the likelihood that the cooling rate will be substantially the same throughout the aerosol generating device. The elongated capillary body preferably extends along the central longitudinal axis of the aerosol or cartridge generating device. Thus, if the air circulation vents or nozzles are spaced symmetrically around the housing, this will result in a substantially equal air circulation on all sides of the capillary body. The vents or nozzles can be arranged in one or more longitudinally spaced rows along the housing. In one embodiment, two longitudinally spaced sets of air circulation vents or nozzles are provided in the housing and each set comprises three air circulation vents or nozzles symmetrically spaced around the circumference of the housing. Other numbers and layouts of air circulation vents or nozzles are possible, of course, however. [0030] The capillary body can comprise any suitable material or combination of materials that is capable of transporting the liquid aerosol-forming substrate to the vaporizer. The capillary body preferably comprises a porous material, but this need not be the case. The capillary body may be shaped like a lock. The capillary body may have a fibrous or spongy structure. The capillary body preferably comprises a bundle of capillaries. For example, the capillary body can comprise a plurality of fibers or filaments or other fine-bore tubes and these can generally be aligned in the longitudinal direction of the aerosol generating device or system. Alternatively, the capillary body may comprise a sponge-like or foam-like material formed into a rod shape. The rod shape can generally extend along the longitudinal direction of the aerosol generating device or system. The particular preferred capillary material or materials will depend on the physical properties of the liquid aerosol forming substrate. Examples of suitable capillary materials include a sponge or foam material, materials based on ceramics or graphite in the form of sintered fibers or powders, foamy metal or plastic material, a fibrous material, for example, made of spun or extruded fibers, such as cellulose acetate, polyester or joined polyolefin, polyethylene, terilene or polypropylene fibers, nylon or ceramic fibers. The capillary material can have any suitable capillarity in order to be used with different liquid physical properties. [0031] The liquid storage portion can protect the liquid aerosol-forming substrate from ambient air (because air cannot generally enter the liquid storage portion). The liquid storage portion can protect the liquid aerosol-forming substrate from light, so that the risk of liquid degradation is significantly reduced. Furthermore, a high level of hygiene can be maintained. The storage portion of the liquid may not be refillable. Thus, when the liquid aerosol-forming substrate in the liquid storage portion has been used up, the cartridge is replaced. Alternatively, the storage portion of the liquid can be refilled. In that case, the cartridge can be replaced after a certain number of refills of the liquid storage portion. Preferably, the liquid storage portion is arranged to hold the liquid aerosol-forming substrate for a predetermined number of puffs. [0032] In another embodiment, the liquid storage portion includes an interior passage, in which the vaporizer extends through at least part of the interior passage when the device is in use with the cartridge and the cartridge still comprises a capillary interface by least partially lining the inner passage to transport the liquid aerosol-forming substrate to the vaporizer. [0033] In this modality, in use, the liquid is transferred from the storage portion of the liquid by the capillary action through the capillary interface covering the inner passage. A first face of the capillary interface is preferably in contact with the liquid aerosol forming substrate in the liquid storage portion. A second face of the capillary interface is in contact with or adjacent to the vaporizer. The liquid near the second face of the capillary interface is vaporized to form the supersaturated vapor, which is mixed with and transported in the air circulation through the interior passage. The interior passage of the liquid storage portion may comprise an aerosol forming chamber to facilitate aerosol generation. The liquid storage portion can be cylindrical in shape and the inner passage can extend along the longitudinal axis of the cylinder. Thus, the storage portion of the liquid may have an annular cross section. The liquid aerosol forming substrate has physical properties including, but not limited to, surface tension, viscosity, density, thermal conductivity, boiling point and vapor pressure that allow the liquid to be transported through the capillary interface by capillary action. [0034] In this modality, if the air circulation vents or nozzles are arranged to direct the air to the proximity of the vaporizer directly on the surface of the vaporizer, the air circulation vents or nozzles can be arranged to direct the air directly over the surface of the capillary interface. The interior passage of the liquid storage portion preferably extends along the longitudinal axis of the cartridge. The capillary interface also preferably extends along the longitudinal axis of the cartridge. If the cartridge has a circular cross section, the inner passage and the capillary interface are preferably centered on the central axis of the cartridge. In this case, the air direction directly on the surface of the capillary interface can be in a radial direction relative to the interior passage, capillary interface and the circular cross section of the cartridge. The air circulation can be substantially perpendicular to the longitudinal axis. Alternatively, air circulation vents or nozzles can be arranged to direct air directly over the surface of the capillary interface, but not directly over the vaporizer. For example, air circulation vents or nozzles can direct air directly over a portion of the capillary interface adjacent to the vaporizer. [0035] The capillary interface can comprise any suitable material or combination of materials that is capable of transporting the liquid aerosol-forming substrate to the vaporizer. The capillary interface preferably comprises a porous material, but this need not be the case. The capillary interface can comprise any suitable capillary material formed in the form of a tube. The capillary tube can extend all or part of the length of the inner passage in the liquid storage portion. The capillary interface can have a fibrous or spongy structure. The capillary interface can comprise a plurality of fibers or filaments or other fine-bore tubes. Alternatively, the capillary interface may comprise a sponge-like or foam-like material. The particular preferred capillary material or materials will depend on the physical properties of the liquid aerosol forming substrate. Examples of suitable capillary materials include a sponge or foam material, materials based on ceramics or graphite in the form of sintered fibers or powders, foamy metal or plastic material, a fibrous material, for example, made of spun or extruded fibers, such as cellulose acetate, polyester or bonded polyolefin, polyethylene, terilene or polypropylene fibers, nylon or ceramic fibers. The capillary material can have any suitable capillarity in order to be used with different liquid physical properties. [0036] The liquid storage portion can protect the liquid aerosol-forming substrate from ambient air (because air cannot generally enter the liquid storage portion). The liquid storage portion can protect the liquid aerosol-forming substrate from light, so that the risk of liquid degradation is significantly reduced. Furthermore, a high level of hygiene can be maintained. The storage portion of the liquid may not be refillable. Thus, when the liquid aerosol-forming substrate in the liquid storage portion has been used up, the cartridge is replaced. Alternatively, the storage portion of the liquid can be refilled. In that case, the cartridge can be replaced after a certain number of refills of the liquid storage portion. Preferably, the liquid storage portion is arranged to hold the liquid aerosol-forming substrate for a predetermined number of puffs. [0037] In another embodiment, the device or cartridge may further comprise an air inlet tube at least partially extending into the interior passage, wherein the air inlet tube includes the plurality of air circulation vents or nozzles and the air circulation route extends along the air inlet tube, through the air circulation vents or nozzles and to the air outlet. [0038] Air circulation vents or nozzles can be spaced at the circumference around the air inlet tube. Preferably, air circulation vents or nozzles are spaced symmetrically around the air inlet tube in order to increase the likelihood that the cooling rate will be substantially the same throughout the aerosol generating device or system. The inner passage of the liquid storage portion and the capillary interface preferably extends along the central longitudinal axis of the cartridge. The air inlet tube also preferably extends along the central longitudinal axis of the cartridge. Thus, if the air circulation vents or nozzles are spaced symmetrically around the air inlet tube, this will result in a substantially equal air circulation in all portions of the capillary and vaporizer interface. The vents or nozzles can be arranged in one or more longitudinally spaced rows along the air inlet tube. In one embodiment, three longitudinally spaced sets of air circulation vents or nozzles are provided in the air inlet tube, and each set comprises three air circulation vents or nozzles symmetrically spaced around the circumference of the air inlet tube. Other numbers and layouts of air circulation vents or nozzles are possible, of course, however. [0039] The aerosol or cartridge generating device may further comprise an air inlet and an air circulation sensor for measuring air circulation through the air inlet, in which a secondary air circulation route is defined between the air inlet and air outlet. In this modality, the primary air circulation is through the air circulation vents or nozzles, but there is a secondary air circulation through the air inlet. Preferably, the secondary air circulation is small compared to the primary air circulation. This allows the speed through the air vents or nozzles in the primary air circulation to be high, but the air speed to be measured by the air circulation sensor in the secondary air circulation. The aerosol generating device or cartridge can be calibrated, such that the air circulation sensor on the secondary air circulation route provides a measure of the air circulation speed on the primary air circulation route and particularly in the vicinity of the vaporizer. Preferably, the secondary air circulation path deviates from the air circulation vents or nozzles. [0040] The vaporizer can be a heater. The heater can heat the aerosol-forming substrate resource by one or more of conduction, convection and radiation. The heater can be an electric heater powered by an electrical power supply. The heater can alternatively be energized by a non-electric power supply, such as a fuel: for example, the heater can comprise a thermally conductive element which is heated by the combustion of a gaseous fuel. The heater can heat the aerosol-forming substrate by means of conduction and can be at least partially in contact with the substrate or a carrier on which the substrate is deposited. Alternatively, the heat from the heater can be conducted to the substrate by means of an intermediate heat conductive element. Alternatively, the heater can transfer heat to the incoming ambient air that is drawn through the aerosol generation system during use, which in turn heats the aerosol-forming substrate by convection. [0041] Preferably, the aerosol generating device is electrically operated and the vaporizer comprises an electric heater to heat the aerosol-forming substrate. [0042] The electric heater can comprise a single heating element. Alternatively, the electric heater may comprise more than one heating element, for example, two or three or four or five or six or more heating elements. The heating element or heating elements can be arranged appropriately so as to more effectively heat the aerosol forming substrate. [0043] The at least one electric heating element preferably comprises an electrically resistive material. Suitable electrically resistive materials include, but are not limited to: semiconductors, such as doped ceramics, electrically "conductive" ceramics (such as, for example, molybdenum disilicate), carbon, graphite, metals, metal alloys and composite materials made of a ceramic material and a metallic material. Such composite materials may comprise doped or non-doped ceramics. Examples of suitable doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum and platinum group metals. Examples of suitable metal alloys include stainless steel, Constantan, nickel, cobalt, chrome, aluminum, titanium, zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese and iron and nickel-based alloys, iron, cobalt, stainless steel, Timetal®, ferro-aluminum based alloys and ferro-manganese-aluminum based alloys. Timetal® is a registered trademark of Titanium Metals Corporation, 1999 Broadway Suite 4300, Denver Colorado. In composite materials, the electrically resistive material can optionally be embedded, encapsulated or coated with an insulating material or vice versa, depending on the energy transfer kinetics and the required external physiochemical properties. The heating element may comprise a cauterized metal foil isolated between two layers of an inert material. In that case, the inert material may comprise Kapton®, total polyimide or mica sheet. Kapton® is a registered trademark of E.I. du Pont de Nemours and Company, 1007 Market Street, Wilmington, Delaware 19898, United States of America. [0044] Alternatively, the at least one electric heating element can comprise an infrared heating element, a photonic source or an inductive heating element. [0045] The at least one electric heating element can have any suitable shape. For example, the at least one electric heating element can be in the form of a heating blade. Alternatively, the at least one electrical heating element may be in the form of a shell or substrate having different electroconductive portions or an electrically resistive metal tube. Alternatively, the at least one electric heating element can be a disc heater (end) or a combination of a disc heater with heating needles or rods. Alternatively, the at least one electric heating element can comprise a flexible sheet of material. Other alternatives include a heating wire or filament, for example, a nickel-chromium, platinum, tungsten or alloy wire or a heating plate. Optionally, the heating element can be deposited inside or on a rigid carrier material. [0046] The at least one electric heating element may comprise a heat sink or heat reservoir comprising a material capable of absorbing and storing heat and subsequently releasing heat over time to heat the aerosol-forming substrate. The heat sink can be formed from any suitable material, such as a suitable metal or ceramic material. Preferably, the material has a high thermal capacity (heat sensitive storage material) or is a material capable of absorbing and subsequently releasing heat via a reversible process, such as a high temperature phase change. Suitable sensitive heat storage materials include silica gel, alumina, carbon, glass mat, fiberglass, minerals, a metal or alloy, such as aluminum, silver or lead and a cellulose material. Other suitable materials that release heat via a reversible phase change include paraffin, sodium acetate, naphthalene, wax, polyethylene oxide, a metal, metal salt, a mixture of eutectic salts or an alloy. [0047] The heat sink can be arranged such that it is directly in contact with the aerosol-forming substrate and can transfer the stored heat directly to the aerosol-forming substrate. Alternatively, the heat stored in the heat sink or heat sink can be transferred to the aerosol-forming substrate by means of a heat conductor, such as a metal tube. [0048] The at least one heating element can heat the aerosol-forming substrate by means of conduction. The heating element may be at least partially in contact with the aerosol forming substrate. Alternatively, the heat from the heating element can be conducted to the aerosol forming substrate by means of a heat conducting element. [0049] Alternatively, the at least one heating element can transfer the heat to the incoming ambient air that is pulled through the aerosol generating device during use, which in turn heats the aerosol-forming substrate by convection . Ambient air can be heated before it passes through the aerosol-forming substrate. Alternatively, the ambient air can first be drawn through the aerosol-forming substrate and then heated. [0050] However, the invention is not limited to heater vaporizers, but can be used in aerosol generating devices and systems in which the resulting vapor and aerosol are generated by a mechanical vaporizer, for example, but not limited to one piezovaporizer or an atomizer using pressurized liquid. [0051] In a particularly preferred embodiment, the aerosol generating device is electrically operated, the vaporizer comprises an electric heater and the aerosol generating device or cartridge further comprises: an elongated capillary body for transporting the liquid aerosol-forming substrate from the liquid storage portion to the electric heater, the capillary body having a first end extending into the liquid storage portion and a second end opposite the first end, where the electric heater is arranged to heat the liquid aerosol-forming substrate at the second end of the capillary body. When the heater is activated, the liquid at the second end of the capillary body is vaporized by the heater to form supersaturated steam. [0052] In another particularly preferred embodiment, the aerosol generating device is electrically operated, the vaporizer comprises an electric heater and the aerosol generating device further comprises: a first end having a nozzle; a second end opposite the first end; an electrical power supply and set of electrical circuits for connection to the electric heater; a storage portion for storing the liquid aerosol forming substrate and an elongated capillary body for transporting the liquid aerosol forming substrate from the liquid storage portion to the electric heater, the capillary body having a first inwardly extending portion the liquid storage portion and a second portion opposite the first portion; wherein the electric heater is arranged to heat the liquid aerosol-forming substrate in the second portion of the capillary body; wherein the liquid storage portion, the capillary body and the electric heater are arranged at the first end of the aerosol generating device and where the electrical power supply and the set of electrical circuits are arranged at the second end of the generating device of aerosol. The liquid storage portion and, optionally, the capillary body and the heater can be removable from the aerosol generating device as a single component. [0053] In another particularly preferred embodiment, the aerosol generating device is electrically operated and the vaporizer comprises an electric heater; the aerosol generating device comprises an electrical power supply and set of electrical circuits for connection to the electric heater and the cartridge comprises a nozzle and an elongated capillary body for transporting the liquid aerosol forming substrate from the liquid storage portion to the electric heater, the capillary body having a first portion extending into the liquid storage portion and a second portion opposite the first portion, in which the electric heater is provided in the cartridge and is arranged to heat the aerosol forming substrate liquid in the second portion of the capillary body. [0054] The storage portion of the liquid and, optionally, the capillary body and the heater can be removable from the aerosol generation system as a single component. [0055] In another particularly preferred embodiment, the aerosol generation system is electrically operated, the vaporizer comprises an electric heater and the liquid storage portion includes an interior passage, where the electric heater extends through at least part of the inner passage when the device is in use with the cartridge and the device or cartridge still comprises a capillary interface at least partially lining the inner passage when the device is in use with the heater to transport the liquid aerosol forming substrate to the electric heater . When the heater is activated, the liquid at the capillary interface is vaporized by the heater to form supersaturated steam. [0056] In another particularly preferred embodiment, the aerosol generating device is electrically operated, the vaporizer comprises an electric heater and the liquid storage portion includes an interior passage, where the electric heater extends through at least part the inner passage; the device comprises an electrical power supply and set of electrical circuits for connection to the electric heater and the cartridge comprises a nozzle and a capillary interface at least partially covering the interior passage to transport the liquid aerosol forming substrate to the electric heater; where the electric heater is arranged in the cartridge. [0057] The liquid storage portion and the capillary interface and optionally the heater, can be removed from the aerosol generation system as a single component. [0058] The liquid aerosol forming substrate preferably has physical properties, for example, boiling point and vapor pressure, suitable for use in the aerosol generating device, cartridge or aerosol generating system. If the boiling point is too high, it may not be possible to heat the liquid, but if the boiling point is too low, the liquid can heat up very easily. The liquid preferably comprises a tobacco-containing material comprising volatile tobacco flavor components which are released from the liquid upon heating. Alternatively, or in addition, the liquid may comprise a tobacco-free material. The liquid can include aqueous solutions, non-aqueous solvents, such as ethanol, plant extracts, nicotine, natural or artificial flavors or any combination thereof. Preferably, the liquid further comprises an aerosol former which facilitates the formation of a dense and stable aerosol. Examples of suitable aerosol builders are glycerin and propylene glycol. [0059] The aerosol generating device or aerosol generating system may be electrically operated and may also comprise an electrical power supply. The electrical power supply can be an AC power source or a DC power source. Preferably, the electrical power supply is a battery. The aerosol generating device or the aerosol generating system may further comprise a set of electrical circuits. In one embodiment, the set of electrical circuits comprises a sensor to detect the air circulation indicative of a user in a puff. If an air inlet having an air circulation sensor is provided as part of a secondary air circulation route, the sensor can be provided in addition. In this case, preferably, the set of electrical circuits is arranged to provide a pulse of electrical current to the vaporizer when the sensor senses a user in a puff. Preferably, the time period of the electric current pulse is predefined, depending on the amount of liquid that you want to vaporize. The set of electrical circuits is preferably programmable for this purpose. Alternatively, the electrical circuitry may comprise a manually operable switch for a user to initiate a puff. The time period of the electric current pulse is preferably predefined depending on the amount of liquid to be vaporized. The set of electrical circuits is preferably programmable for this purpose. [0060] Preferably, the aerosol generating device or cartridge or aerosol generating system comprises a housing. Preferably, the housing is elongated. If the aerosol or cartridge generating device includes an elongated capillary body, the longitudinal axis of the capillary body and the longitudinal axis of the housing can be substantially parallel. The housing may comprise a housing and a nozzle. In that case, all components can be contained in the housing or the nozzle. In one embodiment, the accommodation includes a removable supplement. The removable supplement may comprise the liquid storage portion, the capillary body and the vaporizer. Alternatively, the removable supplement may comprise the liquid storage portion, the capillary interface and the vaporizer. In this embodiment, these parts of the aerosol generating device can be removable from the housing as a single component. This can be useful for replenishing or replacing the storage portion of the liquid, for example. [0061] The housing can comprise any suitable material or combination of materials. Examples of suitable materials include metals, alloys, plastics or composite materials containing one or more of these materials or thermoplastics that are suitable for food or pharmaceutical applications, for example, polypropylene, polyetheretherketone (PEEK) and polyethylene. Preferably, the material is light and not brittle. [0062] Preferably, the aerosol generating device and cartridge are portable, both individually and in cooperation. Preferably, the aerosol generating device is reusable by a user. Preferably, the cartridge is disposable by a user, for example, when there is no more liquid contained in the liquid storage portion. The aerosol generating device and the cartridge can cooperate to form an aerosol generating system which is a smoking system and which can be of a size comparable to a conventional cigar or cigarette. The smoke system can have a total length between approximately 30 mm and approximately 150 mm. The smoke system can have an outside diameter between approximately 5 mm and approximately 30 mm. In this modality, each air circulation vent or nozzle can have a diameter less than or approximately equal to 0.4 mm. The aerosol produced by the aerosol generation system can have an average particle size of less than approximately 1.5 microns or, more preferably, less than approximately 1.0 microns or, even more preferably, less than approximately 0, 7 microns. [0063] Preferably, the aerosol generation system is an electrically operated smoke system. According to the invention, an aerosol generating device is provided comprising: a storage portion for storing the aerosol forming substrate; a vaporizer to heat the aerosol-forming substrate to form an aerosol; a plurality of air circulation vents or nozzles and at least one air outlet, the air circulation vents or nozzles and the air outlet being arranged to define an air circulation route between the air circulation vents or nozzles and the air outlet; wherein each of the plurality of air circulation vents or nozzles comprises an opening arranged to direct the air towards the vaporizer in order to control the particle size in the aerosol, where the air circulation vents or nozzles direct the air to the proximity of the vaporizer in more than one direction. [0064] Features described in relation to one aspect of the invention may be applicable to another aspect of the invention. [0065] The invention will be further described, by way of example only, with reference to the accompanying drawings, of which: [0066] figure 1 shows an embodiment of an aerosol generation system according to the invention, [0067] figure 2 is a section along line II-II of figure 1, [0068] figure 3 is an alternative section along line II-II in figure 1, [0069] figure 4 shows another modality of an aerosol generation system according to the invention and [0070] figure 5 is a section along the line V-V in figure 4. [0071] Figure 1 is a schematic view of a first embodiment of an aerosol generation system according to the invention. Figure 1 is schematic in nature. In particular, the components shown are not necessarily to scale individually or in relation to each other. Although not explicitly shown in figure 1, the aerosol generating system comprises an aerosol generating device which is preferably reusable, in cooperation with a cartridge, which is preferably disposable. In figure 1, the system is an electrically operated smoke system. The smoke system 101 comprises a housing 103, having a first end which is the cartridge 105 and a second end which is the device 107. In the device, an electrical power supply is provided in the form of the battery 109 (shown schematically in figure 1 ) and set of electrical circuits 111 (also shown schematically in figure 1). In the cartridge, a storage portion 113 containing liquid 115, an elongated capillary body 117 and a vaporizer in the form of heater 119 is provided. In this embodiment, heater 119 comprises a spiral heater surrounding capillary body 117. Note that the heater is only shown schematically in figure 1. In the exemplary embodiment shown in figure 1, one end of the capillary body 117 extends into the liquid storage portion 113 and the other end of the capillary body 117 is surrounded by heater 119. The heater is connected to the electrical circuit assembly 111 and battery 109 via connections (not shown), which can pass along the outside of the liquid storage portion 113, although this is not shown in figure 1. The aerosol generation system 101 also includes a plurality of air circulation vents 121, an air outlet 123 at the end of the cartridge and an aerosol forming chamber 125. The circulation path of the air 127 from the air circulation vents 121 to the air outlet 123 via the aerosol forming chamber 125 is shown by the dotted arrows. [0072] In use, the operation is as follows. The liquid 115 is transported by the capillary action of the liquid storage portion 113 from the end of the capillary body 117 which extends into the liquid storage portion to the other end of the capillary body 117 which is surrounded by the heater 119. When a user inhales at the air outlet 123, the ambient air is drawn through the air circulation vents 121. In the embodiment of figure 1, a puff detection device in the electrical circuit assembly 111 senses the puff and activates the heater 119. The battery 109 supplies electrical energy to the heater 119 to heat the end of the capillary body 117 surrounded by the heater. The liquid at that end of the capillary body 117 is vaporized by the heater 119 to create supersaturated steam. At the same time, the liquid being vaporized is replaced by the additional liquid moving along the capillary body 117 by the capillary action. (This is sometimes called "pumping action".) The supersaturated vapor created is mixed with and transported in the air circulation 127 from the air circulation vents 121. In the aerosol forming chamber 125, the vapor condenses to form an inhalable aerosol, which is transported to the air outlet 123 and into the user's mouth. In the embodiment shown in figure 1, the electrical circuitry 111 is preferably programmable and can be used to control the aerosol generation operation. [0073] Figure 2 is a section along line II-II of figure 1. Figure 2 is schematic in nature. In particular, the components shown are not necessarily to scale individually or in relation to each other. In this embodiment, the generation of aerosol 101, the aerosol generating device and the cartridge have a circular cross section. Figure 2 shows the housing 103 at the end of the cartridge, the capillary body 117 and the air circulation vents 121. The heater 119 is not shown in Figure 2 for simplicity. In the embodiment of figure 2, there are two sets of three air circulation vents 121 equally spaced around the circumference of the aerosol generating device. One set of air circulation vents 121 is spaced longitudinally from the other set (see figure 1). Each air circulation vent 121 is arranged to direct air directly over the surface of the capillary body 117 as shown by the arrows dotted in figure 2. Because the aerosol generating system 101 has a circular cross section, the air passing through the air circulation vents 121 are directed in a radial direction and substantially perpendicular to the longitudinal axis of the aerosol generation system 101. Because the air circulation vents 121 are spaced around the circumference of the aerosol generation system , each air circulation vent 121 directs the air towards the vaporizer in a different direction from at least some of the other air circulation vent 121. It has been found that the modality of figure 2 is advantageous, as long as the air in high speed is directed on the surface of the capillary body and this substantially increases the rate of cooling. [0074] Figure 3 is an alternative section along line II-II of figure 1. Figure 3 is schematic in nature. In particular, the components shown are not necessarily to scale individually or in relation to each other. In this embodiment, the aerosol generating system 101 and the aerosol generating device and the cartridge have a circular cross section. As in figure 2, figure 3 shows the housing 103 at the end of the cartridge, the capillary body 117 and the air circulation vents 121. The heater 119 is not shown in figure 3 for simplicity. In the embodiment of figure 3, there are two sets of three air circulation vents 121 equally spaced around the circumference of the aerosol generating device. One set of air circulation vents 121 is spaced longitudinally from the other set (see figure 1). Each air circulation vent 121 is arranged to direct air in one direction across the surface of the capillary body 117 as shown by the dotted arrows in figure 3. Because the aerosol generating system 101 has a circular cross section , the air passing through the air circulation vents 121 is directed in a tangential direction and substantially perpendicular to the longitudinal axis of the aerosol generation system 101. Because the air circulation vents 121 are spaced around the circumference of the device of aerosol generation, each air circulation vent 121 directs the air towards the vaporizer in a direction different from at least some of the other air circulation vents 121. It has been found that the embodiment of figure 3 is advantageous as long as the high-speed air is directed through the surface of the capillary body. This substantially increases the cooling rate while minimizing the cooling of the heater 119. [0075] With reference to figures 1, 2 and 3, each of the air circulation vents 121 comprises a small diameter opening. When a user inhales the aerosol generating device at the air outlet 123, the air is drawn through the air circulation vents 121. Because of the small diameter of the air circulation vents 121, the air passes through at high speed. The high-speed air jet is pulled through the air circulation vents 121 directly into the vicinity of heater 119. This increases the cooling of the supersaturated vapor to form the aerosol. Thus, the high speed air being directed towards the heater 119 controls the formation of the aerosol and, in particular, the particle size of the aerosol. It has been found that greater cooling results in a smaller average aerosol droplet size and a smaller range of aerosol droplet sizes. [0076] With reference to figures 1, 2 and 3, each of the air circulation vents 121 comprises an opening with a small diameter or cross section. When a user inhales the aerosol generating device at the air outlet 123, the air is drawn through the air circulation vents. Because of the small cross-sectional area of each vent 121, air is blown into the vicinity of heater 119 and capillary body 117 at high speed. The high-speed air circulation in the aerosol 125 forming chamber increases the cooling rate, which decreases the average particle size in the aerosol. Preferably, the distance between the air circulation vents 121 and the heater 119 and the capillary body 117 is small. This means that there is little opportunity for air to slow down or develop complex patterns of turbulence. In this embodiment, the air circulation vents 121 are arranged symmetrically around the heater 119 and capillary body 117. This means that the air circulation vents 121 direct the air closer to the heater 119 and capillary body 117 in more than one direction. The symmetrical arrangement also results in relatively homogeneous air circulation throughout the aerosol forming chamber 125 and approximately equal cooling on all sides of heater 119. This reduces the range of particle sizes in the aerosol. [0077] In figures 2 and 3, two sets of three air circulation vents are provided. However, any suitable number and layout of air circulation vents can be provided according to the desired characteristics of the aerosol and the resistance to inhalation of the aerosol generating device. In addition, each air circulation vent may be of a different size or shape or be arranged to direct air circulation in a different direction. [0078] Capillary body 117 can comprise any suitable material or combination of materials that is capable of transporting the liquid aerosol forming substrate 115 to heater 119. Examples of suitable capillary materials include a sponge or foam material, based materials in ceramics or graphite in the form of sintered fibers or powders, foamy metal or plastic material, a fibrous material, for example, made from spun or extruded fibers, such as cellulose acetate, polyester or bonded polyolefin, polyethylene, terilene or polypropylene fibers , nylon or ceramic fibers. The capillary material can have any suitable capillarity in order to be used with different liquid physical properties. [0079] Figure 4 is a schematic view of another embodiment of an aerosol generation system according to the invention. Figure 4 is schematic in nature. In particular, the components shown are not necessarily to scale individually or in relation to each other. Although not explicitly shown in figure 4, the aerosol generating system comprises an aerosol generating device, which is preferably reusable, in cooperation with a cartridge, which is preferably disposable. In figure 4, the system is an electrically operated smoke system. The smoke system 401 comprises a housing 403 having a first end which is the cartridge 405 and a second end which is the device 407. In the device, an electrical power supply is provided in the form of the battery 409 (shown schematically in figure 4) and set of electrical circuits 411 (also shown schematically in figure 4). In the cartridge, a storage portion 413 containing liquid 415 is provided. The storage portion of liquid 413 includes an inner passage 416, which is lined with a capillary interface 417. In the cartridge, a heater 419 is also provided which extends to inside the inner passage 416 of the liquid storage portion 413 and is preferably in contact with the capillary interface 417. In this embodiment, the heater 419 comprises a spiral heater fitting perfectly within the inner passage 416. Note that the heater is only shown schematically in the figure 4. Heater 419 is connected to the set of electrical circuits 411 and battery 409 via connections (not shown). At the end of the cartridge, an air inlet tube 420 is also provided which extends into the inner passage 416 and provides a duct for the air circulation path. The air inlet tube 420 includes a plurality of air circulation vents 421. The aerosol generating system 401 also includes at least one air inlet 422, an air outlet 423 at the end of the cartridge and an air forming chamber. aerosol 425. The air circulation route 427 from the air inlets 422 along the air inlet tube 420, through the air circulation vents 421 and to the air outlet 423 via the aerosol forming chamber 425 is shown dotted arrows. [0080] In use, the operation is as follows. The liquid 415 is transported by the capillary action of the liquid storage portion 413 from the face of the capillary interface 417 which is in contact with the liquid in the liquid storage portion to the face of the capillary interface 417 which is in contact with or adjacent to the heater 419. When a user inhales at the air outlet 423, the ambient air is drawn through the air intakes 422, along the air inlet tube 420 and through the air circulation vents 421. In the form of figure 5, a puff detection device in electrical circuit set 411 senses puff and activates heater 419. Battery 409 supplies electrical energy to heater 419 to heat the liquid at the capillary interface 417. The liquid at the capillary interface 417 is vaporized by the heater 419 to create a supersaturated vapor. At the same time, the liquid being vaporized is replaced by additional liquid moving through the capillary interface 417 of the liquid storage portion 413 pe capillary action. The supersaturated steam created is mixed with and transported in the air circulation 427 from the air circulation vents 421. In the aerosol forming chamber 425, the vapor condenses to form an inhalable aerosol that is transported to the air outlet 423 and inward from the user’s mouth. In the embodiment shown in figure 5, the set of electrical circuits 411 is preferably programmable and can be used to control the operation of generating the aerosol. [0081] Figure 5 is a section along the line V-V of figure 4. Figure 5 is schematic in nature. In particular, the components shown are not necessarily to scale individually or in relation to each other. In this embodiment, the aerosol generating system 401 and the aerosol generating device and the cartridge have a circular cross section. Figure 5 shows the housing 403, the liquid storage portion 413, the inner passage 416 and the capillary interface 417. The heater 419 is not shown in Figure 5 for simplicity. Figure 5 also shows the air inlet tube 420 extended into the inner passage 416. In the embodiment of figure 5, there are three sets of three air circulation vents 421 equally spaced around the circumference of the air inlet tube 420 Each set of air circulation vents 421 is spaced longitudinally from the other sets (see figure 1). Each air circulation vent 421 is arranged to direct air over the capillary interface 417, as shown by the arrows dotted in figure 4. Because the aerosol generating system 401 has a circular cross section, the air passing through the vents air circulation 421 is directed in a radial direction and substantially perpendicular to the longitudinal axis of the aerosol generation system 101. Because the air circulation vents 421 are spaced around the circumference of the air inlet tube 420, each air circulation vent 421 directs the air towards the vaporizer in a different direction from at least some of the other air circulation vent 422. It has been found that the embodiment of figure 5 is advantageous, as long as the air at high speed is directed over the capillary interface and this substantially increases the cooling rate. [0082] With reference to figures 4 and 5, each of the air circulation vents 421 comprises an opening with a small diameter or cross section. When a user inhales at air outlet 423, air is drawn through the air circulation vents. Because of the small cross-sectional area of each 421 vent, the air jet is blown into the vicinity of heater 419 and capillary interface 417 at high speed. The high-speed air circulation in the aerosol forming chamber 425 increases the cooling rate, which decreases the average particle size in the aerosol. Preferably, the distance between the air circulation vents 421 and the heater 419 and the capillary interface 417 is small. This means that there is little opportunity for air to slow down or develop complex patterns of turbulence. In this embodiment, the air circulation vents 421 are arranged symmetrically around the air inlet tube 420. This means that the air circulation vents 421 direct the air closer to the heater 419 and capillary body 417 in more than one direction. The symmetrical arrangement also results in relatively homogeneous air circulation throughout the aerosol forming chamber 425 and approximately equal cooling in all portions of heater 419. This reduces the range of particle sizes in the aerosol. [0083] In figure 5, three sets of three air circulation vents are provided in the air inlet tube. However, any suitable number and layout of air circulation vents can be provided according to the desired characteristics of the aerosol and resistance to inhalation. In addition, each airflow vent may be of a different size or shape or be arranged to direct airflow in a different direction. [0084] Capillary interface 417 can comprise any suitable material or combination of materials that is capable of transporting the liquid aerosol forming substrate 415 to heater 419. Examples of suitable capillary materials include a sponge or foam material, based materials in ceramics or graphite in the form of sintered fibers or powders, foamy metal or plastic material, a fibrous material, for example, made from spun or extruded fibers, such as cellulose acetate, polyester or joined polyolefin, polyethylene, terylene or polypropylene fibers , nylon or ceramic fibers. The capillary material can have any desired capillarity in order to be used with different liquid physical properties. [0085] Figures 1 to 5 show modalities of an aerosol generation system according to the present invention. Many other examples are possible, however. The aerosol generation system simply needs to include a vaporizer to heat the liquid aerosol-forming substrate, a plurality of air circulation vents to direct the air in more than one direction to the proximity of the vaporizer, and at least one air outlet. air and these components can be supplied in the device or in the cartridge. For example, the system does not need to be operated electrically. For example, the system does not have to be a smoke system. In addition, the system may not include a heater, in which case another device may be included to heat the liquid aerosol-forming substrate. For example, the configuration of the capillary material may be different. For example, a puff detection system does not need to be provided. Instead, the system could operate by manual activation, for example, the user operating a switch when a puff is taken. For example, the overall size and shape of the accommodation could be changed. [0086] Preferably, the cartridge is disposable and is arranged to cooperate with an aerosol generating device that is reusable. The cartridge can be refilled or replaced when the liquid is used. Thus, when the liquid aerosol-forming substrate in the cartridge has been used up, the cartridge can be discarded and replaced with a new cartridge or the empty cartridge can be refilled. However, the aerosol generating device may not be designed to operate in conjunction with a separate cartridge. Instead, the aerosol generating device may include or receive a liquid aerosol-forming substrate in a storage portion and comprise a vaporizer to heat the liquid aerosol-forming substrate to form the aerosol, the plurality of circulating vents of air and at least one air outlet. In addition, the aerosol generating device may comprise an electrical power supply and set of electrical circuits. [0087] In a particular embodiment, the aerosol generating device is a portable smoking device with a size comparable to a conventional cigar or cigarette. The smoking device can have a total length of between approximately 30 mm and approximately 150 mm. The smoking device can have an external diameter between approximately 5 mm and approximately 30 mm. In this mode, each air circulation vent can have a diameter less than or approximately equal to 0.4 mm. In one embodiment, in which a puff lasts approximately 2 if you have a total puff volume of 55 mL (which is a puff circulation rate of approximately 27.5 milliliters per second), the high speed of air circulation through the vents air circulation can be 10 ms-1 or between 10 ms-1 and 30 ms-1. The characteristics of the aerosol produced by the aerosol generating device will depend on the substrate forming the liquid aerosol. The aerosol can have an average particle size of less than approximately 1.5 microns or, more preferably, less than approximately 1.0 microns. In one example, in which the aerosol-forming substrate is propylene glycol, the aerosol may have an average particle size of less than approximately 0.7 microns. [0088] As discussed above, according to the invention, the aerosol generating device, cartridge or system includes air circulation vents, which results in a high speed air circulation in the vicinity of the vaporizer. This results in greater cooling leading to a smaller average particle size, more homogeneous air circulation leading to a smaller range of particle sizes in the aerosol and the faster formation of the aerosol leading to a potentially smaller aerosol generating device or system. Porous barrier modalities have been described with reference to figures 1 to 5. The characteristics described in relation to one modality can also be applicable to another modality.
权利要求:
Claims (15) [0001] 1. An aerosol generating device comprising: a vaporizer (115, 415) for heating an aerosol-forming substrate; air circulation vents (121, 421); and at least one air outlet (123, 423), the air circulation vents (121, 421) and the air outlet (123, 423) being arranged to define an air circulation route (127, 427) between the air circulation vents (121, 421) and the air outlet (123, 423); and characterized by the fact that each of the air circulation vents (121, 421) is an air inlet vent arranged to direct the air towards the proximity of the vaporizer (115, 415) in a direction across the surface of the vaporizer ( 115, 415) and perpendicular to the longitudinal axis of the device, in order to control the particle size in the aerosol. [0002] 2. Aerosol generating device according to claim 1, characterized by the fact that the air intake vents (121, 421) direct the air in more than one direction. [0003] Aerosol generating device according to claim 1 or 2, characterized in that at least one of the air circulation vents (121, 421) includes a deflected portion. [0004] Aerosol generating device according to any one of the preceding claims, characterized by the fact that it comprises a housing (103, 403), in which the air intake vents (121, 421) are formed in the housing (103 , 403) to allow ambient air to be drawn out of the device through the air intake vents (121, 421). [0005] An aerosol generating device according to any one of the preceding claims, characterized by the fact that each of the air inlet vents (121, 421) has a diameter less than or approximately equal to 0.4 mm. [0006] 6. Aerosol generating device according to any one of the preceding claims, characterized by the fact that, for a flow rate of 27.5 milliliters per second through the air outlet (123, 423), the circulation speed of air through each of the air intake vents (121, 421) is between 10 and 30 meters per second. [0007] Aerosol generating device according to any one of the preceding claims, characterized in that it further comprises: a storage portion (113) for storing the aerosol forming substrate; and an elongated capillary body (117) for transporting the aerosol forming substrate from the storage portion (113) to the vaporizer (115, 415), the capillary body having a first end extended into the storage portion (113) and a second end opposite the first end, wherein the vaporizer (115, 415) is arranged to heat the aerosol forming substrate at the second end of the capillary body. [0008] An aerosol generating device according to any one of the preceding claims, characterized by the fact that it still comprises a secondary air inlet and an air circulation sensor to measure air circulation through the air inlet, in which a secondary air circulation route (127, 427) is defined between the secondary air inlet and the air outlet (123, 423). [0009] A cartridge (105, 405) for cooperating with an aerosol generating device as defined in any one of claims 1 to 8, comprising: a storage portion (113) for storing an aerosol forming substrate; a vaporizer (115, 415) for heating the aerosol-forming substrate; air circulation vents (121, 421); and at least one air outlet (123, 423), the air circulation vents (121, 421) and the air outlet (123, 423) being arranged to define an air circulation route (127, 427) between the air circulation vents (121, 421) and the air outlet (123, 423); characterized by the fact that each of the air circulation vents (121, 421) is an air inlet vent arranged to direct air towards the vaporizer (115, 415) in a direction across the surface of the vaporizer (115 , 415) and perpendicular to the longitudinal axis of the device, in order to control the particle size in the aerosol. [0010] 10. Cartridge (105, 405) according to claim 9, characterized by the fact that the air intake vents (121, 421) direct the air in more than one direction. [0011] 11. Cartridge (105, 405) according to claim 9 or 10, characterized in that it comprises a housing (103, 403), in which the air intake vents (121, 421) are formed in the housing ( 103, 403) to allow ambient air to be drawn from outside the device through the air intake vents (121, 421). [0012] 12. Cartridge (105, 405) according to any one of claims 9 to 11, characterized in that each of the air inlet vents (121, 421) has a diameter less than or approximately equal to 0, 4 mm. [0013] 13. Cartridge (105, 405) according to any one of claims 9 to 12, characterized by the fact that, for a flow rate of 27.5 milliliters per second through the air outlet (123, 423), the air circulation speed through each of the air intake vents (121, 421) is between 10 and 30 meters per second. [0014] 14. Cartridge (105, 405) according to any of claims 9 to 13, characterized in that the vaporizer (115, 415) comprises an electric heater to heat the aerosol forming substrate, the electric heater being connectable in an electrical power supply (109, 409). [0015] An aerosol generating system applied to an aerosol generating device as defined in any one of claims 1 to 8, comprising: a vaporizer (115, 415) for heating an aerosol forming substrate; air circulation vents (121, 421); and at least one air outlet (123, 423), the air circulation vents (121, 421) and the air outlet (123, 423) being arranged to define an air circulation route (127, 427) between the air circulation vents (121, 421) and the air outlet (123, 423); characterized by the fact that each of the air circulation vents (121, 421) is an air inlet vent arranged to direct the air close to the vaporizer (115, 415) and perpendicular to the longitudinal axis of the system, so to control the particle size in the aerosol, in which the air circulation vents (121, 421) direct the air to the proximity of the vaporizer (115, 415) in more than one direction, in which each of the air circulation vents air (121, 421) has a diameter less than or approximately equal to 0.4 mm.
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同族专利:
公开号 | 公开日 IL232322A|2019-02-28| BR112014012830A2|2017-06-13| US20140334802A1|2014-11-13| CN103974637B|2017-04-19| AR089589A1|2014-09-03| IL232322D0|2014-06-30| MX358384B|2018-08-16| PL2787848T3|2019-06-28| CA2853647C|2020-05-05| AU2012347294A1|2014-07-24| SG11201403017SA|2014-07-30| RU2014127684A|2016-02-10| EP2787848B1|2018-08-22| UA115433C2|2017-11-10| ZA201402706B|2015-03-25| RU2616556C2|2017-04-17| KR102010104B1|2019-08-12| TW201340896A|2013-10-16| IN2014DN03501A|2015-05-08| JP6189321B2|2017-08-30| PT2787848T|2018-11-30| TWI590770B|2017-07-11| WO2013083638A1|2013-06-13| JP2015504653A|2015-02-16| MY172412A|2019-11-25| NZ624110A|2016-06-24| ES2688362T3|2018-11-02| KR20140110843A|2014-09-17| CA2853647A1|2013-06-13| CN103974637A|2014-08-06| AU2012347294B2|2017-12-07| EP2787848A1|2014-10-15| US10272170B2|2019-04-30| MX2014006925A|2014-09-04|
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法律状态:
2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]| 2020-06-23| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]| 2020-12-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]| 2021-03-02| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
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申请号 | 申请日 | 专利标题 EP11192698|2011-12-08| EP11192698.6|2011-12-08| PCT/EP2012/074518|WO2013083638A1|2011-12-08|2012-12-05|An aerosol generating device with air flow nozzles| 相关专利
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