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    • 专利摘要:
    "electrically heated smoking system with internal or external heater". the present invention relates to an electrically heated smoking system (103, 203) to receive an aerosol forming substrate (105, 205). the system comprises a heater to heat the substrate to form the aerosol, and the heater comprises a heating element (113, 213, 214). the electrically heated smoking system (103, 203) and the heating element (113, 213, 214) are arranged so that when the aerosol-forming substrate (105,205) is received in the electrically heated smoking system, the element heating element (113, 213, 214) extends a distance only partially along the length of the aerosol forming substrate, and the heating element is positioned towards the downstream end of the aerosol forming substrate.
    公开号:BR112012012672B1
    申请号:R112012012672-5
    申请日:2010-11-26
    公开日:2020-02-18
    发明作者:Olivier Greim；Julien Plojoux；Dani Ruscio；Gerard Zuber
    申请人:Philip Morris Products S.A.；
    IPC主号:
    专利说明:

    Descriptive Report of the Invention Patent for ELECTRICALLY HEATED SMOKING SYSTEM WITH INTERNAL OR EXTERNAL HEATER.
    [0001] The present invention relates to an electrically heated smoking system including a heater to heat an aerosol-forming substrate.
    [0002] EP-A-0 358 002 discloses a smoking system comprising a cigarette with a resistance heating element for heating the tobacco material in the cigarette. The cigarette has an electrical connection plug for connection to a reusable handheld controller. The handheld controller includes a battery and current control that controls the power supply to the resistance of the heating element in the cigarette.
    [0003] A problem with this proposed smoking system is that tobacco smoke tends to condense on the inside walls of the system. This is undesirable because the condensation that accumulates on the internal walls of the system can lead to reduced performance.
    [0004] Consequently, it is advantageous to provide an electrically heated smoking system that, in use, minimizes the risk of smoke or aerosol condensation on its internal walls.
    [0005] According to the invention, an electrically heated smoking system is provided to receive an aerosol-forming substrate, the system comprising a heater for heating the substrate to form the aerosol, the heater comprising a heating element, wherein the electrically heated smoking system and the heating element are arranged so that when the aerosol forming substrate is received in the electrically heated smoking system, the heating element extends a distance only partly along the length of the forming substrate aerosol spray, and the heating element is
    Petition 870190106038, of 10/21/2019, p. 4/46
    2/35 positioned towards the downstream end of the aerosol forming substrate.
    [0006] According to another aspect of the invention, an electrically heated smoking system is provided to receive an aerosol-forming substrate, the system comprising a heater to heat the substrate to form the aerosol, the heater comprising a heating element, wherein the electrically heated smoking system and the heating element are arranged so that when the aerosol-forming substrate is received in the electrically heated smoking system, the heating element extends a distance only partially along the length of the substrate of aerosol formation.
    [0007] According to another aspect of the invention, an electrically heated smoking system is provided to receive an aerosol forming substrate, the system comprising a heater for heating the substrate to form the aerosol, comprising a heating element, wherein the electrically heated smoking system and the heating element are arranged so that when the aerosol forming substrate is received in the electrically heated smoking system, the heating element is positioned towards the downstream end of the heating formation substrate. aerosol.
    [0008] Positioning the heating element so that it extends only partially along the length of the aerosol forming substrate reduces the energy required to heat the substrate and produce the aerosol.
    [0009] In addition, the positioning of the heating element towards the downstream end of the aerosol forming substrate also minimizes the risk of aerosol condensation on the inner walls of the smoking system. This is because the portion
    Petition 870190106038, of 10/21/2019, p. 5/46
    3/35 heated aerosol-forming substrate (eg, a tobacco stick) located outside the heating element acts as a filtration zone, thereby minimizing the risk of the aerosol leaving the upstream end of the aerosol-forming substrate .
    [00010] Furthermore, the positioning of the heating element towards the downstream end of the aerosol forming substrate shortens the zone contained between the downstream end of the heating element and the downstream end of the aerosol forming substrate. This leads to a significant reduction in the energy required to generate an aerosol for the user. This also leads to a reduction in the time of the first puff, that is, the time between feeding the heating element and providing the aerosol to a user.
    [00011] The heating element can be an external heating element. Preferably, the heating element extends completely or partially around the circumference of the aerosol-forming substrate. In one embodiment, the heating element extends substantially and completely around the circumference of the aerosol-forming substrate.
    [00012] Alternatively, the heating element can be an internal heating element. In one embodiment, the heating element is arranged to be inserted into the aerosol-forming substrate. The heating element can be positioned at least partially inside or outside the aerosol forming substrate.
    [00013] Preferably, the aerosol forming substrate is substantially cylindrical in shape. The aerosol forming substrate can be substantially elongated. The substrate of
    Petition 870190106038, of 10/21/2019, p. 6/46
    Aerosol formation can also have a length and circumference substantially perpendicular to the length. Preferably, the electrically heated smoking system comprises an aerosol forming substrate in which the length of the aerosol forming substrate is substantially parallel to the direction of the air flow in the electrically heated smoking system. [00014] Preferably, electrical energy is supplied to the heating element (or, in the modalities where other heating elements are included, to one or more of the heating elements) until the heating element or elements reach a temperature within approximately 250 o C and 440 o C. Any appropriate temperature sensor and control circuits can be used to control the heating of the heating element or elements to reach a temperature between approximately 250 o C and 440 o C. This, in contrast to conventional cigarettes in which the combustion of tobacco and the cigarette wrapper can reach 800 o C.
    [00015] The ends upstream and downstream of the electrically heated smoking system are defined with respect to the air flow when the user takes a puff. Typically, the incoming air enters the electrically heated smoking system at the upstream end, combines with the aerosol and conducts the aerosol in the air flow towards the user's mouth at the downstream end. As known to those skilled in the art, an aerosol is a suspension of solid particles or liquid droplets or both solid particles and liquid droplets in a gas, such as air.
    [00016] Preferably, the substrate forms part of a separate smoking article and the user can blow directly on the smoking article. The smoking article can be substantially cylindrical in shape. The smoking article can be substantially elongated. O
    Petition 870190106038, of 10/21/2019, p. 7/46
    The smoking article may have a length and circumference substantially perpendicular to the length. The smoking article can have a total length of between approximately 30 mm and approximately 100 mm. The smoking article can have an outside diameter between approximately 5 mm and approximately 12 mm. The smoking article may comprise a filter plug. The filter plug may be located at the downstream end of the smoking article. The filter plug may be a cellulose acetate filter plug. The filter plug is preferably approximately 7 mm in length, but may have a length of between approximately 5 mm to approximately 10 mm.
    [00017] Preferably, the smoking article is a cigarette. In a preferred embodiment, the smoking article has a total length of approximately 45 mm. It is also preferable for the smoking article to have an outside diameter of approximately 7.2 mm. Preferably, the aerosol forming substrate comprises tobacco. In addition, the aerosol forming substrate can be approximately 10 mm long. However, it is more preferable for the aerosol forming substrate to be approximately 12 mm long. In addition, the diameter of the aerosol forming substrate can also be between approximately 6 mm and approximately 12 mm. The smoking article may comprise an outer paper wrapper. In addition, the smoking article may comprise a separation between the aerosol forming substrate and the filter plug. The separation can be approximately 18 mm, but can be in the range of approximately 5 mm to approximately 25 mm.
    [00018] The heating element that is positioned towards the downstream end of the aerosol forming substrate can be defined as the separation between the downstream end of the aerosol
    Petition 870190106038, of 10/21/2019, p. 8/46
    6/35 heating element and the downstream end of the aerosol forming substrate, which is less than the separation between the upstream end of the heating element and the upstream end of the aerosol forming substrate.
    [00019] Preferably, the downstream end of the heating element is upstream of the downstream end of the aerosol forming substrate by a distance d equal to, or greater than, approximately 1 mm. Having a distance d greater than, or equal to approximately 1 mm (instead of having d = 0), this prevents the heating from being immediately adjacent to the non-aerosol forming part of the smoking article, such as the non-smoking part. cigarette (with the exception of cigarette paper) downstream of the tobacco plug. This reduces heat dissipation through non-smoking materials. In addition, this gap allows a reduction in the mainstream smoking temperature.
    [00020] Preferably, the end upstream of the heating element is downstream of the end upstream of the aerosol forming substrate by a distance and between approximately 2 mm and approximately 6 mm. Even more preferably, the upstream end of the heating element is downstream of the upstream end of the aerosol forming substrate by a distance of approximately 4 mm.
    [00021] The unheated portion of the aerosol forming substrate located at the upstream end, that is, between the upstream end of the aerosol forming substrate and the upstream end of the heating element, provides an effective filtration zone. This minimizes the risk of the aerosol leaving the upstream end of the aerosol forming substrate in the electrically heated smoking system. This also minimizes the risk of aerosol condensation inside the smoking system.
    Petition 870190106038, of 10/21/2019, p. 9/46
    7/35 electrically heated, which minimizes the number of cleaning operations required for the entire duration of the smoking system. In addition, the unheated upstream portion of the aerosol-forming substrate acts as a slow-release aerosol reservoir that can be accessible by thermal conduction through the substrate throughout the smoking experience.
    [00022] Preferably, the ratio of the distance w, that the heating element extends along the aerosol-forming substrate, to the length l of the aerosol-forming substrate, w is between approximately 0.35 and approximately 0 , 6. Even more preferably, the ratio is approximately 0.5.
    [00023] The w ratio of between approximately 0.35 and approximately 0.6 has the advantage that it maximizes the volume of aerosol released to the user, while minimizing the amount of aerosol leaving the upstream portion of the aerosol forming substrate. This minimizes the risk of aerosol condensation in the smoking system. In addition, this relationship also has the advantage that it minimizes heat loss through non-smoking materials. This means that the smoking system requires less energy.
    [00024] Even more preferably, the ratio of the distance that the heating element extends along the aerosol-forming substrate to the length of the aerosol-forming substrate is approximately 0.5. A ratio of approximately 0.5 (for an aerosol-forming substrate such as either a 10 or 12 mm tobacco plug) offers the best balance in terms of aerosol releases, minimizing the risk of the aerosol leaving the upstream end of the aerosol-forming substrate and aerosol temperature.
    Petition 870190106038, of 10/21/2019, p. 10/46
    8/35 [00025] In an electrically heated smoking system, the heater further comprises a second heating element arranged when the aerosol-forming substrate is received in the electrically heated smoking system: to extend a distance y only partially along the length l of the aerosol-forming substrate; and to be upstream of the first heating element. The first heating element, the second heating element or both heating elements can extend substantially partially or completely along the circumference of the aerosol forming substrate.
    [00026] In another embodiment, the heater further comprises a second heating element arranged, when the aerosol-forming substrate is received in the electrically heated smoking system, to extend a distance y only partially along the length l of the forming substrate. of aerosol.
    [00027] The provision of a second heating element upstream of the first heating element allows different parts of the aerosol forming substrate to be heated at different times. This is also advantageous, since the aerosol-forming substrate does not need to be reheated, for example, if the user wants to stop and resume the smoking experience. In addition, the provision of two separate heating elements provides more direct control of the temperature gradient across the aerosol-forming substrate and therefore control of aerosol generation. Preferably, the heating elements are independently controllable.
    [00028] Other heating elements can be provided between the first and second heating elements. For example, the heater can comprise three, four, five, six or more
    Petition 870190106038, of 10/21/2019, p. 11/46
    9/35 heating elements.
    [00029] Preferably, the separation between the first heating element and the second heating element is equal to or more than approximately 0.5 mm. That is, preferably the separation between the end upstream of the first heating element and the end downstream of the second heating element is equal to or greater than approximately 0.5 mm. However, any separation between the first and second heating elements can be used, provided that the first and second heating elements are not in electrical contact with each other.
    [00030] Preferably, the end upstream of the second heating element is downstream of the end upstream of the aerosol forming substrate by a distance g between approximately 2 mm and approximately 4 mm. Even more preferably, the upstream end of the second heating element is downstream of the upstream end of the aerosol forming substrate by a distance g of approximately 3 mm.
    [00031] Again, the unheated portion of the aerosol forming substrate located at the upstream end, that is, between the upstream end of the aerosol forming substrate and the upstream end of the second heating element, provides a zone of effective filtration. This minimizes the risk of the aerosol escaping from the upstream end of the aerosol forming substrate in the electrically heated smoking system. This also minimizes the risk of aerosol condensation inside the electrically heated smoking system, which minimizes the number of cleaning operations required for the entire duration of the electrically heated smoking system. In addition, the upstream portion does not
    Petition 870190106038, of 10/21/2019, p. 12/46
    10/35 heated aerosol-forming substrate acts as a slow-release aerosol reservoir that can be accessible by thermal conduction through the substrate throughout the smoking experience.
    [00032] For the modalities of the invention that have two heating elements, the lengths of both heating elements can be slightly reduced (compared to the length of the heating element in the modalities of the invention that have only one heating element) in order to maintain a zone upstream of the second heating element which is cooler than the heated portion of the aerosol forming substrate, and a zone downstream of the first heating element which is cooler than the heated portion of the aerosol forming substrate aerosol. That is, for the embodiments of the invention that have only a single heating element, the heating element can have a length of approximately 4 mm. Then, for the embodiments of the invention that have two heating elements, the length of each heating element can be reduced to approximately 3 mm, for example. A decrease in length can be compensated for by higher electrically energy.
    [00033] Alternatively, the first heating element (downstream) can have substantially the same dimension as the heating element in the smoking system which has only a single heating element, but the second heating element (upstream) can be shorter in length than the first heating element. That is, the first heating element has a length that is greater than the length of the second heating element. For example, the first heating element can have a length of
    Petition 870190106038, of 10/21/2019, p. 13/46
    11/35 approximately 4 mm, while the second heating element can be approximately 3 mm long.
    [00034] This means that the substantially equal aerosol yields and the first puff time are provided by the first and second heating elements.
    [00035] Preferably, the ratio of the distance (x + y) that the first heating element and the second heating element together extend along the aerosol-forming substrate, to the length l of the aerosol-forming substrate ( x * y is between approximately 0.5 and approximately 0.8.
    [00036] The inventors found that this ratio range ( x * maximizes the benefits of the smoking experience. This ratio has the advantage that it maximizes the amount of aerosol release, while minimizing the amount of aerosol that escapes from the portion a amount of the aerosol-forming substrate.This minimizes the risk of aerosol condensation within the smoking system. In addition, this relationship also has the advantage that it minimizes heat loss through non-smoking materials. smoking requires less energy.A ratio of approximately 0.7 (for either 10 mm or 12 mm tobacco plug) offers the best balance in terms of aerosol releases, minimizing the risk of the aerosol leaving the upstream end of the aerosol-forming substrate and aerosol temperature.
    [00037] Each heating element may be in the form of a ring extending substantially partially or completely around the circumference of the aerosol forming substrate. Preferably, the position of each heating element is fixed with respect to the electrically heated smoking system and therefore the
    Petition 870190106038, of 10/21/2019, p. 14/46
    12/35 aerosol forming substrate. Preferably, the heater does not include an end portion for heating the upstream end of the aerosol forming substrate. This provides an unheated portion of aerosol-forming substrate at the upstream end.
    [00038] Each heating element preferably comprises an electrically resistant material. Each heating element may comprise a non-elastic material, for example, a ceramic sintered material, such as alumina (Al2O3) and silicon nitride (Si3N4), or printed circuit board. Alternatively, each heating element may comprise an elastic metal material, for example, an iron alloy or a nickel-chromium alloy.
    [00039] Other suitable electrically resistant 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 of a ceramic material and a metallic material. Such composite materials may comprise doped or non-doped ceramics. Examples of doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum and metals from the platinum group. Examples of suitable metal alloys include stainless steel, nickel, cobalt, chromium, aluminum-titanium-zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium and manganese, and nickel, iron, cobalt, superalloys. stainless steel, Timetal® and ferro-manganese-aluminum alloys. Timetal® is a registered trademark of Titanium Metals Corporation, 1999 Broadway Suite 4300, Denver, Colorado. In composite materials, the electrically resistant material can optionally be embedded in, encapsulated or
    Petition 870190106038, of 10/21/2019, p. 15/46
    13/35 coated with an insulating material or vice versa, depending on the energy transfer kinetics and the required physicochemical properties.
    [00040] Alternatively, each heating element may comprise an infrared heating element, a photonic source or an inductive heating element.
    [00041] Each 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 the aerosol forming substrate. The heat sink can be formed from any suitable material, such as a metal or ceramic material. Preferably, the material has a high heat capacity (heat sensitive storage material), or is a material capable of absorbing and substantially releasing heat through a reversible process, such as a high temperature phase change. Heat-sensitive 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 such as paper. Other suitable materials that release heat through a reversible phase exchange include paraffin, sodium acetate, naphthalene, wax, polyethylene oxide, a metal, metal salt, a mixture of eutectic salts or an alloy.
    [00042] The aerosol-forming substrate preferably comprises a tobacco-containing material containing volatile tobacco flavor compounds that are released from the substrate upon heating. Alternatively, the aerosol forming substrate may comprise a non-tobacco material.
    [00043] Preferably, the aerosol forming substrate further comprises an aerosol former. Examples of trainers
    Petition 870190106038, of 10/21/2019, p. 16/46
    Suitable aerosol 14/35 are glycerin and propylene glycol.
    [00044] In one embodiment, the aerosol-forming substrate is a solid or substantially solid substrate. The solid substrate may comprise, for example, one or more of: powders, granules, pellets, scraps, spaghetti, strips or leaves containing one or more leaves of grass, tobacco leaf, fragments of tobacco ribs, reconstituted tobacco, homogenized tobacco , extruded tobacco and expanded tobacco. The solid substrate can be provided as a cylindrical plug of the aerosol-forming substrate. Alternatively, the solid substrate can be provided in an appropriate container or cartridge. Optionally, the solid substrate may contain additional tobacco or non-tobacco volatile flavor compounds, to be released upon heating of the substrate.
    [00045] Optionally, the solid substrate can be supplied or embedded in a thermally stable carrier. The carrier can take the form of powders, granules, pellets, scraps, spaghetti, strips or leaves. Alternatively, the carrier can be a tubular carrier having a thin layer of the solid substrate deposited on its outer surface, or on both the inner and outer surfaces. Such a tubular carrier can be formed, for example, from a paper, or paper-like material, a non-woven carbon fiber mat, a low-mass open-mesh wire mesh, or a perforated metal sheet or any other thermally polymeric matrix stable. The solid substrate can be deposited on the surface of the carrier in the form, for example, of foil, foam or suspension. The solid substrate can be deposited over the entire surface of the carrier or, alternatively, can be deposited in a pattern in order to provide a non-uniform aroma release during use.
    [00046] Alternatively, the carrier can be a non-woven cloth
    Petition 870190106038, of 10/21/2019, p. 17/46
    15/35 or bundle of fibers in which the tobacco components are incorporated. The non-woven cloth or bundle of fibers may comprise, for example, carbon fibers, natural cellulose fibers or fibers from cellulose derivatives.
    [00047] The aerosol forming substrate may alternatively be a liquid substrate. If a liquid substrate is provided, the electrically heated smoking system preferably comprises means for retaining the liquid. For example, the liquid substrate can be retained in a container. Alternatively, or in addition, the liquid substrate can be absorbed into a porous carrier material. The porous carrier material can be made of any suitable absorbent body or plug, for example, a foamed metal or plastic material, polypropylene, terylene, nylon or ceramic fibers. The liquid substrate can be retained in the porous carrier material prior to use of the electrically heated smoking system or, alternatively, the liquid substrate material can be released into the porous carrier material during, or immediately before use. For example, the liquid substrate can be supplied in a capsule. The capsule shell preferably melts upon heating and releases the liquid substrate into the porous carrier material. The capsule can optionally contain a solid aerosol-forming substrate in combination with the liquid.
    [00048] Alternatively, or in addition, if the aerosol forming substrate is a liquid substrate, the electrically heated smoking system may further comprise an atomizer in contact with the source of the liquid substrate and including the heating element or elements. The atomizer converts the liquid into an aerosol or fine mist of particles. The atomizer may comprise a liquid source connected to a tube. The tube can be heated
    Petition 870190106038, of 10/21/2019, p. 18/46
    16/35 by an electric heater in close proximity to the tube, or in contact with the tube. The liquid is atomized when the tube is heated by the heater when electrical energy is passed through the heater.
    [00049] In addition to the heating element or elements, the atomizer may include one or more electromechanical elements such as piezoelectric elements. In addition, or alternatively, the atomizer can also include elements that use electrostatic, electromagnetic or pneumatic effects. The electrically heated smoking system may further comprise a condensation chamber.
    [00050] The aerosol forming substrate may alternatively be any other type of substrate, for example, a gas substrate, or any combination of the various types of substrate. During operation, the substrate may be completely contained within the electrically heated smoking system. In this case, a user can puff on an electrically heated smoking nozzle. Alternatively, during operation, the substrate may be partially contained within the electrically heated smoking system. In this case, the substrate can form part of a separate smoking article and the user can blow directly on the smoking article.
    [00051] Preferably, the electrically heated smoking system further comprises an energy supply to supply energy to the heating element or elements. The power supply can be any appropriate power supply, for example, a DC voltage source. In one embodiment, the power supply is a lithium-ion battery. Alternatively, the power supply can be a nickel-metal hydride battery or a nickel-cadmium battery.
    Petition 870190106038, of 10/21/2019, p. 19/46
    17/35 [00052] Preferably, the electrically heated smoking system further comprises electronic circuits arranged to be connected to the power supply and the heating element or elements. If more than one heating element is provided, electronic circuits preferably provide the heating elements to be independently controllable. Electronic circuits can be programmable.
    [00053] In one mode, the system also comprises a sensor to detect air flow indicative of a user taking a puff. The sensor can be an electromechanical device. Alternatively, the sensor can be any of: a mechanical device, an optical device, an optical-mechanical device and a sensor based on electromechanical microsystems (MEMS). In this mode, the sensor is preferably connected to the power supply and the system is willing to activate the heating element or elements when the sensor perceives a user taking a puff. In an alternative mode, the system also comprises a manually operable switch, for a user to start a puff.
    [00054] Preferably, the system further comprises a housing for receiving the aerosol forming substrate and designed to be gripped by a user.
    [00055] The aspects described in relation to one aspect of the invention can also be applicable to another aspect of the invention.
    [00056] The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
    figure 1 is a schematic diagram showing a first embodiment of the electrically heated smoking system in use with a smoking article;
    figure 2 is a schematic diagram showing a
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    18/35 second embodiment of the electrically heated smoking system in use with a smoking article;
    figure 3 is a detailed view of a cross section of an external heating element according to an embodiment of the invention, which can be used in conjunction with figure 1 or figure 2;
    figure 4 is a detailed view of an external heating element placed flat according to an embodiment of the invention, which can be used in conjunction with figure 1 or figure 2;
    figure 5 is a detailed view of an external heating element placed flat according to another embodiment of the invention, which can be used in conjunction with figure 1 and figure 2; and figures 6 to 11 show a method of forming an internal heater according to an embodiment of the invention. [00057] Figure 1 shows a smoking article 101 received in an electrically heated smoking system 103 according to a first embodiment of the invention. In this embodiment, the smoking article 101 has an elongated cylindrical shape and comprises an aerosol forming substrate 105, and a filter plug 107, arranged sequentially and in coaxial alignment. Components 105 and 107 are over-wrapped with an outer paper wrapper 109. In this embodiment, the aerosol forming substrate 105 is in the form of a cylindrical plug of the solid substrate. The length 1 of the plug is substantially parallel to the length of the smoking article and also substantially parallel to the direction of the air flow (not shown) in the electrically heated smoking system when a user breathes over the smoking article. The circumference of the plug is substantially perpendicular to the length. The filter plug
    Petition 870190106038, of 10/21/2019, p. 21/46
    19/35
    107 is located at the downstream end of the smoking article 101 and, in this embodiment, is separated from the aerosol forming substrate 105 by separation 111.
    [00058] As already discussed, various types of smoking articles can be used in the context of the present invention. The smoking article does not have to be as illustrated in figure 1. In particular, the smoking article does not have an aerosol-forming substrate length that is substantially perpendicular to its circumference.
    [00059] In the first embodiment illustrated in figure 1, the electrically heated smoking system 103 comprises a heater having a heating element 113. The heating element is resistant, and heats as the electric current is passed through the heating element. heating. In this embodiment, the heating element 113 is in the form of a ring, having a width w and a diameter h.
    [00060] In figure 1, the upstream end of the smoking article 101 is labeled 115, while the downstream end of the smoking article is labeled 11. Furthermore, the upstream end of the aerosol forming substrate is labeled 119, while the downstream end of the aerosol forming substrate is labeled 121. Finally, the upstream end of the heating element is labeled 123, while the downstream end of the heating element is labeled 125.
    [00061] In an alternative embodiment, the heater can be an internal heater, a built -in heater is one that is placed within the aerosol forming substrate, for example as described in European Patent copending application No. 09252501.3, filed on 29 October 2009, of the applicant, whose contents are incorporated into this document in its entirety. The internal heater can be manufactured as described below with reference to the
    Petition 870190106038, of 10/21/2019, p. 22/46
    20/35 figures 6 to 11.
    [00062] In an alternative embodiment, the heater may comprise a temperature sensor used as an internal heater that is placed inside the aerosol-forming substrate. An example of an appropriate indoor heater is a PT temperature resistant sensor that can be used as an indoor heater. The PT temperature resistant sensor can be made by Heraeus Sensor Technology, Reinhard-Heraeus-Ring, 23D63801, Kleinostheim, Germany.
    [00063] In the case of both internal and external heaters, the heating element 113 extends only partially along the length l of the cylindrical plug of the aerosol forming substrate 105. That is, the width w of the heating element 113 is less than the length 1 of the plug of the aerosol forming substrate 105. The heating element 113 is positioned towards the downstream end 121 of the aerosol forming substrate 105.
    [00064] In the embodiment illustrated in Figure 1, the downstream end 125 of the heating element 113 is upstream from the downstream end 121 of the cylindrical plug of the aerosol forming substrate 105. In this embodiment, the separation between the downstream end 125 of the heating element 113 and the downstream end 121 of the cylindrical plug of the aerosol forming substrate 105 is d. Also in this embodiment, the downstream end 123 of the heating element 113 is downstream of the upstream end 119 of the cylindrical plug of the aerosol forming substrate 105. In this embodiment, the separation between the upstream end 123 of the heating element 113 and the upstream end 119 of the cylindrical plug of the aerosol forming substrate 105 is e.g.
    Petition 870190106038, of 10/21/2019, p. 23/46
    21/35 [00065] The inventors of the present invention have found that the various dimensions of the heating element 113 and the aerosol forming substrate plug 105, as well as the relative positions of the heating element 113 and the forming substrate plug. aerosol 105, can be adjusted by substantially improving the smoking experience. In particular, the time of the first puff can be reduced. That is, the time between the heating element being activated and the user being able to take a first puff on the smoking article can be reduced. In addition, the energy required to generate the aerosol and sustain that aerosol generation can be reduced. In addition, this minimizes the risk of the aerosol leaving the upstream portion of the aerosol forming substrate. In addition, the formation of condensate and other residues within the electrically heated smoking system can be minimized, which minimizes the cleaning required.
    [00066] As already mentioned, the heating element 112 is positioned towards the downstream end of the aerosol forming substrate 105. That is, d <e. For an aerosol-forming substrate containing tobacco, positioning the heating element 113 towards the downstream end of the aerosol-forming substrate 105 shortens the tobacco filtration zone contained between the downstream end of the heating element 113 and the downstream end of the aerosol forming substrate buffer 105 (i.e., reduces d). This leads to a significant reduction in the energy required to generate a pleasant smoke and similarly leads to a reduction in the time of the first puff. However, it is preferable for d not to be reduced to zero, as previously described. In fact, it appears that, in order to maximize the benefits of the smoking experience, the separation between the downstream end of the heating element 113 and the downstream end of the cylindrical plug of the
    Petition 870190106038, of 10/21/2019, p. 24/46
    22/35 aerosol forming substrate 105, d, must be greater than or equal to 1 mm.
    [00067] Furthermore, it appears that, in order to maximize the benefits of the smoking experience, the separation between the upstream end 123 of the heating element 113 and the upstream end 119 of the (preferably) cylindrical plug of the substrate of aerosol formation 105, and, it should be between 2 mm and 6 mm and, more preferably, 4 mm. This unheated portion of the cylindrical plug located at the upstream end provides an effective filtration zone to minimize the risk of the aerosol leaving the upstream end of the aerosol-forming substrate of the smoking article. Consequently, this minimizes the risk of aerosol condensation, such as tobacco smoke, within the inner walls of the electrically heated smoking system 103, which minimizes the number of cleaning operations required for the duration of the electrically heated smoking system. In addition, the unheated area acts as a reservoir of slow-release smoking material that can be accessed by thermal conduction inside the plug during the smoking experience.
    [00068] In addition, it turns out that, in order to maximize the benefits of the smoking experience, the width w of the heating element 113 with respect to the length l of the aerosol forming substrate plug 105, as well as the positioning of the heating element 113 with respect to the aerosol forming substrate buffer 105 can be adjusted. In particular, it turns out that the ratio of the width of the heating element to the length of the aerosol-forming substrate buffer, w as well as w itself, can be adjusted to properly release the aerosol to a desired number of puffs.
    [00069] Figure 2 shows a smoking article 201 received at a
    Petition 870190106038, of 10/21/2019, p. 25/46
    Electrically heated smoking system 203 according to a second embodiment of the invention. In this embodiment, as in figure 1, the smoking article 201 has an elongated cylindrical shape and comprises an aerosol-forming substrate 205, and a filter plug 207, arranged sequentially and in coaxial alignment. Components 205 and 207 are overwrapped with an outer paper wrapper 209. In this embodiment, the aerosol forming substrate 205 is in the form of a cylindrical plug of solid substrate. The length 1 of the plug can be substantially parallel to the length of the smoking article and also substantially parallel to the direction of the air flow (not shown) in the electrically heated smoking system when a user breathes over the smoking article. The circumference of the plug can be substantially perpendicular to the length. The filter plug 207 is located at the downstream end of the smoking article 201 and, in this embodiment, is separated from the aerosol forming substrate 205 by separation 211.
    [00070] As already discussed, various types of smoking articles can be used in the context of the present invention. The smoking article does not have to be as illustrated in figure 2. For example, the smoking article does not necessarily have to have an aerosol-forming substrate length substantially perpendicular to its circumference.
    [00071] In the second embodiment illustrated in figure 2, the electrically heated smoking system 203 comprises a heater having a first heating element 213 and a second heating element 214 upstream of the first heating element. In this embodiment, the heating elements 213, 214 are both in the form of rings. That is, the heaters are external heating elements. The heating elements
    Petition 870190106038, of 10/21/2019, p. 26/46
    24/35 are resistant, and heat up as the electric current is passed through the smoking element.
    [00072] In figure 2, the upstream end of the smoking article 201 is labeled 215, while the downstream end of the smoking article is labeled 217. In addition, the upstream end of the aerosol forming substrate is labeled 219, while the downstream end of the aerosol forming substrate is labeled 221. In addition, the upstream end of the first heating element 214 is labeled 223, while the downstream end of the heating element 213 is labeled 225. Finally, the end upstream of the second heating element 214 is labeled 227, while the downstream end of the second heating element 214 is labeled 229.
    [00073] In an alternative embodiment, one or more of the heaters may be an internal heater. An internal heater is one that is placed within the aerosol forming substrate, for example as described in European Patent copending application No. 09252501.3, filed on 29 October 2009, the applicant, whose contents are incorporated herein by its entirety. The internal heater can be manufactured as described below with reference to figures 6 to 11.
    [00074] In an alternative embodiment, the heater may comprise a temperature sensor used as an internal heater that is placed inside the aerosol-forming substrate. An example of an appropriate indoor heater is a PT temperature resistant sensor used as an indoor heater. The PT temperature resistant sensor can be made by Heraeus Sensor Technology, Reinhard-Heraeus-Ring, 23D-63801, Kleinostheim, Germany.
    [00075] Two of these heaters can be placed adjacent
    Petition 870190106038, of 10/21/2019, p. 27/46
    25/35 to each other and fixed or retained in position on a retainer to form the first heating element 213 and the second heating element 214 upstream of the first heating element.
    [00076] For both internal and external heaters, the width of the first heating element 213 is x and the width of the second heating element 214 is y. In this embodiment, both heating elements 213, 214 have the same diameter h although the diameters need not be the same. Both heating elements 213, 214 can extend substantially around the circumference of the cylindrical plug of the aerosol forming substrate 205. Alternatively, one or more of the heating elements can be an internal heater inserted into the aerosol forming substrate as previously. described. However, each heating element extends only partially along the length l of the cylindrical plug of the aerosol-forming substrate 205. That is, the width x of the first heating element 213 is less than the width l of the aerosol-forming substrate 205 and the width y of the second heating element 214 is also less than the length 1 of the plug of the aerosol-forming substrate 205. In addition, both heating elements together extend only partially along the length of the cylindrical plug of the aerosol-forming substrate 205. That is (x + y) is less than the length l of the plug of the aerosol-forming substrate 205. The first heating element 213 is positioned at the downstream end 221 of the aerosol forming substrate 205 and the second heating element 214 is positioned upstream of the first heating element 213 and separated from the first element heating for a distance s. In other words, the
    Petition 870190106038, of 10/21/2019, p. 28/46
    26/35 upstream end 223 of the first heating element
    213 is separated from the downstream end 229 of the second element
    214 for a distance s.
    [00077] In this embodiment, the downstream end 225 of the first heating element 213 is upstream from the downstream end 221 of the aerosol forming substrate buffer 205. In this embodiment, the separation between the downstream end 225 of the first heating element heating 213 and the downstream end 221 of the cylindrical plug of the aerosol forming substrate 205 is f. Also, in this embodiment, the upstream end 227 of the second heating element 214 is downstream of the upstream end 219 of the cylindrical plug of the aerosol forming substrate 205. In this embodiment, the separation between the upstream end 227 of the second heating element heating 214 and the upstream end 219 of the cylindrical plug of the aerosol forming substrate 205 is g. As already mentioned, the separation between the heating elements 213 and 214 is s.
    [00078] The inventors of the present invention have found that the various dimensions of the heating elements 213, 214 and the aerosol forming substrate cap 205, as well as the relative positions of the heating elements 213, 214 and the forming substrate cap aerosol spray 205 can be adjusted to substantially improve the smoking experience. In particular, the time of the first puff can be reduced. That is, the time between the heating element or elements being activated and the user being able to take the first puff on the smoking article can be reduced. In addition, the energy required to generate the aerosol and sustain that aerosol generation can be reduced. In addition, this minimizes the risk of the aerosol escaping from the upstream portion of the aerosol forming substrate. In addition, the risk of the formation of
    Petition 870190106038, of 10/21/2019, p. 29/46
    27/35 condensate and other residues within the electrically heated smoking system can be minimized, which minimizes the cleaning required.
    [00079] As already mentioned, the heating elements 213, 214 are positioned towards the downstream end of the aerosol forming substrate 205. That is, f <g. For an aerosol forming substrate containing tobacco, positioning the heating elements 213, 214 towards the downstream end of the aerosol forming substrate 205 shortens the tobacco filtration zone contained between the downstream end of the first heating element 213 and the downstream end of the cap of the aerosol forming substrate 205 (i.e., reduces f). This leads to a significant reduction in the energy required to generate a pleasant smoke and similarly leads to a reduction in time for the first puff. However, it is preferable for f not to be reduced to zero, as previously described. In fact, it appears that, in order to maximize the benefits of the smoking experience, the separation between the downstream end of the first heating element 213 and the second end downstream of the cylindrical plug of the aerosol forming substrate 205, f , must be greater than or equal to 1 mm.
    [00080] Furthermore, it is found that, in order to maximize the benefits of the smoking experience, the separation between the upstream end 227 of the second heating element 214 and the upstream end 219 of the (preferably) cylindrical plug of the substrate aerosol build-up 205, g, must be between 2 mm and 4 mm and, more preferably, 3 mm. This unheated portion of the cylindrical plug located at the upstream end 218 of the aerosol forming substrate provides an effective filtration zone to minimize the risk of the aerosol escaping from the upstream portion of the aerosol.
    Petition 870190106038, of 10/21/2019, p. 30/46
    28/35 aerosol forming substrate. Consequently, this minimizes the risk of aerosol condensation, for example, tobacco smoke, within the inner walls of the electrically heated smoking system 203. This minimizes the number of cleaning operations required throughout the duration of the electrically heated smoking system . Furthermore, the unheated zone acts as a reservoir of slow-release smoking material that can be accessed during the thermal conduction smoking experience within the aerosol-forming substrate.
    [00081] In order to maximize g, in order to provide an effective filtration zone and, at the same time, to minimize f, in order to reduce energy requirements, the separation s of the heating elements 213, 214 must be minimized. However, it turns out that s should not be reduced to zero, as previously described. In fact, it appears that, in order to maximize the benefits of the smoking experience, the separation between the upstream end 223 of the first heating element 213 and the downstream end 229 of the second heating element 214 must be greater than or equal to about 0.5 mm.
    [00082] Furthermore, it appears that, in order to maximize the benefits of the smoking experience, the combined width (x + y) of the heating elements 213, 214 in relation to the length l of the aerosol-forming substrate buffer 205, as well as the positioning of the heating elements 213, 214 with respect to the aerosol forming substrate buffer 205 can be adjusted. In particular, it appears that the ratio of the combined width of the heating elements to the length of the aerosol-forming substrate buffer, ( xy must be between 0.5 and 0.8. The ratio ( x + as well as x and y, can be adjusted to
    Petition 870190106038, of 10/21/2019, p. 31/46
    29/35 properly release the aerosol to a desired number of puffs.
    [00083] Figure 3 is a detailed view of a cross section of a heating element according to an embodiment of the invention. Figure 4 is a detailed view of an external heating element placed flat according to one embodiment of the invention and Figure 5 is a detailed view of an external heating element placed flat according to another embodiment of the invention. The external heating elements in figures 3, 4 and 5 can be used in conjunction with the modalities of both figures 1 and figure 2. Note that, for the sake of clarity, figures 1,2, 3, 4 and 5 are not on the same scale.
    [00084] Figure 3 is a section through the external heating elements 113, 213, 214. As shown in figure 3, the heating elements 113, 213, 214 can take the form of an incomplete ring, having a diameter h. An electrical connection for a voltage V + is made at A, and an electrical connection for a voltage V- is made at B. The ring is incomplete because a gap or separation can be formed in the ring to provide electrical connections A and B. Na In figure 3, the gap between the two terminals A and B is exaggerated for reasons of clarity. However, the gap or spacing between the two terminals is preferably as small as possible, while not allowing an electrical short between the two terminals. The gap between the two terminals can be 0.5 mm or 1 mm.
    [00085] In figure 3, an aerosol forming substrate 105, 205 is located inside or inside the external heating element. In Figure 3, the aerosol-forming substrate 105, 205 is surrounded by a paper wrapper 109, 209. However, this is, in fact, optional in the case where the aerosol-forming substrate is surrounded by a external role, the element
    Petition 870190106038, of 10/21/2019, p. 32/46
    30/35 heating can be in physical contact with the outer paper wrapper to allow effective heat transfer to the aerosol forming substrate through a paper wrapper. In the case where there is no paper wrapper, the heating element 113, 213, 214 can be in physical contact with the aerosol forming substrate to directly transfer heat to the aerosol forming substrate.
    [00086] Figure 4 shows the heating element on which the ring is placed flat to show the detailed structure of the heating element. The heating element may comprise one or more substantially u-shaped segments having two substantially straight portions electrically connected to each other by a semicircular portion. One or more of the u-shaped elements is joined at the end of one of the straight portions of the u-shaped elements to form the structure shown in figure 4. The straight portions can be substantially parallel to each other. In use, the straight portions can be positioned so that they are substantially parallel to the longitudinal axis of the smoking article. The heating element can extend substantially completely around the circumference of the aerosol-forming substrate. The heating element can be removed from the appropriate sheet material and then formed into a ring as shown in figure 3.
    [00087] Figure 5 shows another modification of the heating element in which the ring is placed flat to show the detailed structure of the heating element. The heating element shown in figure 5 comprises a rectangle of the sheet material. The heating element can be removed from the appropriate sheet material and then formed into a ring shape as shown in figure 3, by shaping or bending.
    Petition 870190106038, of 10/21/2019, p. 33/46
    31/35 [00088] Other shapes of the heating element are possible, such as one or more semicircular rings, each ring electrically joined to its neighbor so that when it is placed flat, the semicircular rings form an elongated structure that extends across a particular direction. The rings are arranged so that they form gutters and peaks in a wrinkled or wavy structure. As before, the heating element can be flat suppressed from an appropriate piece of material using a print in the appropriate shape. The heating element can then be bent to the appropriate shape, as shown in figure 3. The heating element can also be mechanically attached to the rest of the smoking system, to prevent relative movement of the housing and heater.
    [00089] Preferably, the control circuits are provided that control when voltages are applied to A and B. When a potential difference is applied between A and B, electrical current flows along the heating element from A to B or from B to A, and the heating element heats up as a result of the Joule heating effect that occurs in the heating element. In an alternative embodiment, the heating element does not have to comprise one or more u-shaped elements, but it can be substantially annular in shape with a portion of the annular space removed to allow the electrical connection of a potential difference.
    [00090] The provision of two heating elements in the mode of figure 2 allows the user to interrupt and resume the smoking experience without having to reheat any portion of the substrate. One possible method of use is as follows. First, the first (downstream) heating element 213 is activated at the beginning of the smoking experience. Then, the heating element 213 is deactivated in one of the following cases: 1) the
    Petition 870190106038, of 10/21/2019, p. 34/46
    32/35 puff count of the first heating element 213 reaches a predetermined limit, 2) the user ends the smoking experience, or 3) the smoking article 201 is removed from the electrically heated smoking system 203. Then, the second ( upstream) heating element 214 can be activated in one of the following cases: 1) the user wants to resume the smoking experience after a short or prolonged stop, or 2) the puff count of the first heating element 213 has reached a predetermined limit , so the second heating element 214 needs to be activated in order to start heating a new portion of the substrate.
    [00091] This method allows a new portion of the substrate to be heated for each heating sequence. One or more other heating elements can be provided between the downstream heating element and the upstream heating element.
    [00092] The heating elements shown in figures 1, 2, 3, 4 and 5 can be made of any suitable material, for example, an electrically resistant material. Preferred materials include a ceramic sintered material, such as alumina (Al2O3) and silicon nitride (Sl3N4), printed circuit board, silicon rubber, an iron alloy or a nickel-chromium alloy.
    [00093] The aerosol forming substrates shown in figures 1, 2, 3, 4 and 5 can be provided in any appropriate form. In the illustrated embodiments, the substrate is a solid substrate in the form of a cylindrical plug that forms part of a smoking article. The substrate may alternatively be a separate substrate that can be directly inserted into the electrically heated smoking system.
    [00094] Figures 6 to 11 show a manufacturing process for the internal heater using a technique similar to that used in printing
    Petition 870190106038, of 10/21/2019, p. 35/46
    33/35 screen.
    [00095] With reference to figure 6, first an electrically insulating substrate 601 is provided. The electrically insulating substrate can comprise any suitable electrically insulating material, for example, but not limited to, a ceramic such as MICA, glass or paper. Alternatively, the electrically isolated substrate may comprise an electrical conductor that is isolated from electrically conductive tracks (produced in figure 7 and discussed below), for example, by oxidizing or anodizing its surface or both. An example is anodized aluminum. Alternatively, the electrically insulating substrate may comprise an electrical conductor to which an intermediate coating called a glaze is added. In this case, the glaze has two functions: to electrically isolate the substrate from the electrically conductive tracks, and to reduce the curvature of the substrate. Folds in the electrically insulating substrate can lead to breaks in the electrically conductive paste (applied in figure 7 and discussed below) causing defective resistors.
    [00096] With reference to figure 7, the electrically insulating substrate is safely retained, such as by a vacuum, while a metal paste 701 is coated over the electrically insulating substrate using a cut 703. Any suitable metal paste can be used, but, in one example, the metal paste is silver paste. In a particularly advantageous example, the paste comprises 20% to 30% of binders and plasticizers and 70% to 80% of metal particles, typically silver particles. The 703 cut provides a template for the desired electrically conductive tracks. After the metal paste 701 has been coated on the electrically insulating substrate 601, the electrically insulating substrate and the paste are burned, for example, in a sintering furnace. In a
    Petition 870190106038, of 10/21/2019, p. 36/46
    34/35 first burning phase at between 200 o C and 400 o C, the organic binders and solvents are burned. In a second phase of between 350 o C and 500 o C the metal particles are sintered.
    [00097] With reference to figure 8, the result is an electrically insulating substrate 601 having an electrically conductive track or tracks 801 on it. The electrically conductive track or tracks comprise heating resistors and the necessary connection dampers. Finally, the electrically insulating substrate 601 and the electrically conductive tracks 801 are formed in the appropriate form for use as a heater in an electrically heated smoking system.
    [00098] With reference to figure 9, the electrically insulating substrate 601 can be laminated in tubular form, so that the electrically conductive tracks are placed inside the electrically insulating substrate. In this case, the tube can act as an external heater for a solid plug of aerosol-forming material. The inner diameter of the tube can be equal to or slightly larger than the diameter of the aerosol-forming buffer.
    [00099] With reference to figure 10, alternatively, the electrically insulating substrate 601 can be laminated in tubular form, so that the electrically conductive tracks are placed outside the electrically insulating substrate. In this case, the tube can act as an internal heater and can be inserted directly into the aerosol-forming substrate. This can work well when the aerosol forming substrate takes the form of a tube of tobacco material, for example, such as a tobacco mat. In that case, the outer diameter of the tube may be equal to or slightly less than the inner diameter of the tube of the aerosol forming substrate.
    [000100] With reference to figure 11, alternatively, if the substrate
    Petition 870190106038, of 10/21/2019, p. 37/46
    Electrically insulating 35/35 601 is sufficiently rigid or is reinforced in some way, some or all of the electrically insulating substrate and the electrically conductive tracks can be used directly as an internal heater simply by inserting the electrically insulating substrate and the electrically conductive tracks directly into the substrate of aerosol formation.
    权利要求:
    Claims (13)
    [1]
    1. Electrically heated smoking system (103, 203) for receiving an aerosol forming substrate (105, 205) the system comprising an aerosol forming substrate and a heater for heating the substrate to form the aerosol, the heater comprising an heating element (113, 213), in which the electrically heated smoking system (103, 203) and the heating element (113, 213) are arranged so that when the aerosol forming substrate (105, 205) is received in the electrically heated smoking system, the heating element (113, 213) extends a distance only partially along the length of the aerosol forming substrate, and the heating element is positioned towards the downstream end of the aerosol-forming substrate, in which the ratio of the distance the heating element extends along the aerosol-forming substrate, to the length of the aerosol-forming substrate ossol, is between 0.35 and 0.6, characterized by the fact that the downstream end (125, 225) of the heating element (113, 213) is upstream of the downstream end (121, 221) of the substrate of aerosol formation (105, 205) over a distance equal to or greater than 1 mm.
    [2]
    2. Electrically heated smoking system according to claim 1, characterized in that the heating element (113, 213) extends substantially completely around the circumference of the aerosol forming substrate (105, 205).
    [3]
    3. Electrically heated smoking system according to any one of the preceding claims, characterized in that the heating element (113, 213) is arranged to be inserted into the aerosol forming substrate (105, 205).
    Petition 870190106038, of 10/21/2019, p. 39/46
    2/3
    [4]
    4. Electrically heated smoking system according to any one of the preceding claims, characterized in that the upstream end (123) of the heating element (113) is downstream of the upstream end (119) of the forming substrate aerosol spray (105) for a distance between 2 mm and 6 mm.
    [5]
    Electrically heated smoking system according to any one of the preceding claims, characterized in that the downstream end (123) of the heating element (113) is downstream of the upstream end (119) of the forming substrate aerosol spray (105) for a distance of around 4 mm.
    [6]
    6. Electrically heated smoking system according to any one of the preceding claims, characterized by the fact that the ratio of the distance that the heating element extends along the aerosol-forming substrate to the length of the aerosol-forming substrate, is around 0.5.
    [7]
    Electrically heated smoking system according to any one of claims 1 to 3, characterized in that the heater further comprises a second heating element (214) arranged, when the aerosol forming substrate (205) is received in the electrically heated smoking system: to extend a distance only partially along the length of the aerosol-forming substrate, and to be upstream of the first heating element (213).
    [8]
    Electrically heated smoking system according to claim 7, characterized in that the separation between the upstream end (225) of the first heating element (213) and the downstream end (227) of the second
    Petition 870190106038, of 10/21/2019, p. 40/46
    3/3 heating element (214) is equal to or greater than 0.5 mm.
    [9]
    Electrically heated smoking system according to claim 7 or 8, characterized in that the upstream end (229) of the second heating element (214) is downstream of the upstream end (219) of the substrate aerosol formation (205) for a distance between 2 mm and 4 mm.
    [10]
    Electrically heated smoking system according to any one of claims 7 to 9, characterized in that the upstream end (229) of the second heating element (214) is downstream of the upstream end (219) of the aerosol forming substrate (205) for a distance of around 3 mm.
    [11]
    11. Electrically heated smoking system according to any one of claims 7 to 10, characterized in that the distance relationship that the first heating element and the second heating element together extend along the aerosol-forming substrate for the length of the aerosol forming substrate it is between 0.5 and 0.8.
    [12]
    12. Electrically heated smoking system according to any of the preceding claims, characterized in that the aerosol-forming substrate is a solid substrate.
    [13]
    13. Electrically heated smoking system according to any one of the preceding claims, characterized by the fact that the aerosol-forming substrate is a liquid substrate.
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    同族专利:
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    KR20210138787A|2021-11-19|
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    PL2503912T3|2018-08-31|
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    US20160174613A1|2016-06-23|
    KR102152082B1|2020-09-07|
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    CN102665459A|2012-09-12|
    JP2013511962A|2013-04-11|
    KR20170122845A|2017-11-06|
    CN102665459B|2016-06-01|
    PT2503912T|2018-07-13|
    CA3031261A1|2011-06-03|
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    HUE050356T2|2020-11-30|
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    KR20200054332A|2020-05-19|
    KR20120104533A|2012-09-21|
    AU2010324131A1|2012-06-14|
    UA106255C2|2014-08-11|
    PL3266323T3|2021-04-19|
    WO2011063970A1|2011-06-03|
    US9084440B2|2015-07-21|
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    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-08-06| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2019-12-17| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-02-18| 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 26/11/2010, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP09252687A|EP2327318A1|2009-11-27|2009-11-27|An electrically heated smoking system with internal or external heater|
    EP09252687.0|2009-11-27|
    PCT/EP2010/007178|WO2011063970A1|2009-11-27|2010-11-26|An electrically heated smoking system with internal or external heater|
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