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    • 专利摘要:
    METHOD AND APPARATUS TO CLEAN AN AEROSOL GENERATION DEVICE HEATING ELEMENT The present invention relates to a method of using an aerosol generating device (10) which comprises the steps of bringing a heating element (90) from the device of aerosol generation for contact with an aerosol-forming substrate (30), raise the temperature of the heating element (90) to a first temperature to heat the aerosol-forming substrate (30) sufficiently to form an aerosol , remove the heating element from contact with the aerosol-forming substrate, and heat the heating element to a second temperature, higher than the first temperature, to thermally release organic materials adhered to or deposited on the heating element. One embodiment of an aerosol generating device (10) comprises a heating element (90) coupled to a controller (19) to heat the heating element at the first temperature and the second temperature.
    公开号:BR112014015517B1
    申请号:R112014015517-8
    申请日:2012-12-28
    公开日:2021-02-09
    发明作者:Julien Plojoux；Olivier Greim
    申请人:Philip Morris Products S.A.；
    IPC主号:
    专利说明:

    [001] The present invention relates to a method of using an aerosol generating device having a reusable heating element and an aerosol generating device comprising a heating element for use in the consumption of a smoking article.
    [002] Smoking articles, in which an aerosol-forming substrate, such as a substrate containing tobacco, is heated rather than burned, are known in the art. The purpose of such heated smoking articles is to reduce the known harmful smoke components produced by the combustion and pyrolytic degradation of tobacco in conventional cigarettes. Typically, in such heated smoking articles, an aerosol is generated by transferring heat from a heat source to a physically separate aerosol-forming substrate or material, which can be located inside, around or downstream of the heat source. During smoking, volatile compounds are released from the aerosol-forming substrate by transferring heat from the heat source and trapped in the air aspirated through a smoking article. As the compounds are cooled, they condense to form an aerosol that is inhaled by the consumer.
    [003] Numerous prior art documents describe aerosol generating devices for consuming or smoking heated smoking articles. Such devices include, for example, heated smoking systems and electrically heated smoking systems. An advantage of these systems is that they significantly reduce side smoke, while allowing the smoker to selectively suspend and restart smoking. An example of a heated smoking system is described in U.S. Patent No. 5,144,962, which includes, in one embodiment, a means of generating aroma in contact with a heater. When the medium is exhausted, both it and the heater will be replaced. An aerosol generating device is desirable where a smoking article can be replaced without the need to remove the heating element.
    [004] Typically, smoking articles for use with aerosol generating devices comprise an aerosol-forming substrate that is assembled, often with other elements or components, in the form of a rod. Typically, such a rod is configured in a shape and size to be inserted into an aerosol generating device that comprises a heating element to heat the aerosol forming substrate.
    [005] Other aerosol generating devices, such as the electric lighter described in United States Patent No. 5,878,752, use a glove, for example, of ceramic or metal, that surrounds the heating device, and a heating element resistive is in thermal proximity to the glove. In conjunction with the glove-type heater, a cleaning element is optionally inserted into the cigarette receptacle of the electric lighter or placed at its outlet to absorb, attract and / or catalytically break the thermally released condensates. In such systems, the cigarette warming device can be defined by blades that concentrically surround an inserted cigarette.
    [006] In contrast to such systems, direct contact between a heating element, for example, an electrically driven heating element, and the aerosol-forming substrate can provide an efficient means of heating the aerosol-forming substrate to form an inhalable aerosol. In such a device configuration, the heat from a heating element can be conducted almost instantly to at least a portion of the aerosol forming substrate, when the heating element is activated, and this can facilitate the rapid generation of an aerosol. In addition, all the heating energy required to generate an aerosol may be lower than would be the case in a system where the aerosol-forming substrate does not come into direct contact with a heating element and the initial heating of the substrate occurs by convection or radiation. When a heating element is in direct contact with an aerosol forming substrate, the initial heating of the portions of the substrate that are in contact with the heating element will be carried out by conduction.
    [007] As used herein, the term 'aerosol generating device' refers to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol forming substrate may be part of an aerosol generating article, for example, a smoking article. An aerosol generating device may comprise one or more components used to supply energy from an energy supply to an aerosol-forming substrate to generate an aerosol.
    [008] An aerosol generating device can be described as a heated aerosol generating device, which is an aerosol generating device comprising a heater. The heater is preferably used to heat an aerosol forming substrate from an aerosol generating article to generate an aerosol.
    [009] An aerosol generating device may be an electrically heated aerosol generating device, which is an aerosol generating device comprising a heater that is operated by electrical energy to heat an aerosol-forming substrate from a generation article. of aerosol to generate an aerosol. An aerosol generating device may be a gas-heated aerosol generating device. An aerosol generating device can be a smoking device that interacts with an aerosol forming substrate of an aerosol generating article to generate an aerosol that is directly inhaled into a user's lungs through the user's mouth.
    [0010] As used herein, the term 'aerosol-forming substrate' refers to a substrate capable of releasing volatile compounds that can form an aerosol. Such volatile compounds can be released by heating the aerosol-forming substrate. An aerosol-forming substrate can be adsorbed, coated, impregnated or otherwise conducted on a conductor or support. An aerosol-forming substrate may conveniently be part of an aerosol-generating article or smoking article.
    [0011] An aerosol-forming substrate may be solid or liquid and may comprise nicotine. An aerosol-forming substrate may comprise tobacco, for example, it may comprise a tobacco-containing material containing volatile tobacco flavor compounds, which are released from the aerosol-forming substrate upon heating. In preferred embodiments, an aerosol-forming substrate may comprise homogenized tobacco material, for example, reconstituted tobacco.
    [0012] As used herein, the terms 'aerosol generating article' and 'smoking article' refer to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, an aerosol generating article may be a smoking article that generates an aerosol that is directly inhaled into a user's lungs through the user's mouth. An aerosol-generating article may be disposable.
    [0013] Preferably, an aerosol generating article is a heated aerosol generating article, which is an aerosol generating article comprising an aerosol forming substrate that is intended to be heated instead of being burned in order to release volatile compounds that can form an aerosol. The aerosol formed by heating the aerosol-forming substrate may contain fewer known harmful components than would be produced by combustion or pyrolytic degradation of the aerosol-forming substrate. An aerosol generating article may be, or may comprise, a tobacco stick.
    [0014] The present specification provides a method of using an aerosol generating device, and a kit comprising an aerosol generating device, as demonstrated in this specification. Several embodiments are shown in this specification.
    [0015] Thus, in one aspect, the present specification can provide a method of using an aerosol generating device that features a reusable heating element to heat an aerosol-forming substrate. The method comprises the steps of bringing the heating element into direct contact with the aerosol-forming substrate and raising the temperature of the heating element to a first temperature to heat the aerosol-forming substrate in such a way that an aerosol is formed . The method provides the steps of removing or removing the heating element from contact with the aerosol forming substrate and raising the temperature of the heating element to a second temperature sufficient to thermally release organic materials deposited on the heating element. The second temperature is a higher temperature than the first temperature. Thermal release can occur through a carbonization or pyrolysis reaction.
    [0016] The aerosol-forming substrate may be a solid aerosol-forming substrate.
    [0017] Alternatively, the aerosol-forming substrate may comprise both solid and liquid components. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavor compounds, which are released from the substrate upon heating. Alternatively, the aerosol forming substrate may comprise a non-tobacco material. The aerosol forming substrate may additionally comprise an aerosol former. Examples of suitable aerosol builders are glycerin and propylene glycol.
    [0018] If the aerosol-forming substrate is a solid aerosol-forming substrate, the solid aerosol-forming substrate may comprise, for example, one or more of: powder, granules, pellets, rags, threads, strips or sheets containing one or more of: grass leaf, tobacco leaf, tobacco leaf fragments, reconstituted tobacco, processed tobacco, homogenized tobacco, extruded tobacco and expanded tobacco. The solid aerosol-forming substrate may be in loose form, or it may be provided in a suitable container or cartridge. For example, the aerosol forming material of the substrate can be contained within a paper or wrapper and be in the form of a plug. When an aerosol-forming substrate is in the form of a buffer, the entire buffer including any wrapping paper will be considered to be the aerosol-forming substrate.
    [0019] Optionally, the solid aerosol-forming substrate may contain additional tobacco or volatile non-tobacco flavor compounds, to be released upon heating of the substrate. The solid aerosol-forming substrate may contain capsules that, for example, include additional tobacco or non-tobacco flavor volatile compounds, and such capsules may fuse while heating the solid aerosol-forming substrate.
    [0020] Optionally, the solid aerosol forming substrate can be provided or embedded in a thermally stable conductor. The conductor may be in the form of dust, granules, pellets, rags, threads, strips or leaves. The solid aerosol-forming substrate can be deposited on the conductor's surface, or alternatively, can be deposited in a pattern to provide a non-uniform aroma dispensing during use.
    [0021] In preferred embodiments, the aerosol-forming substrate is contained in a smoking article, for example, a rod shaped smoking article, such as a cigarette. The smoking article is preferably of a size and shape suitable to be engaged with the aerosol generating device in order to bring the aerosol forming substrate into contact with the heating element of the device. For example, 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.
    [0022] The terms 'upstream' and 'downstream' can be used to describe relative positions of elements or components of the smoking article. For the sake of simplicity, the terms 'upstream' and 'downstream', as used here, refer to a relative position along the rod of the smoking article with reference to the direction in which the aerosol is drawn through the rod.
    [0023] The heating element can be conveniently formed as a needle, pin, rod, or blade that can be inserted into a smoking article in order to come into contact with the aerosol-forming substrate. The aerosol generating device may comprise more than one heating element and, in the following description, reference to a heating element indicates one or more heating elements.
    [0024] The temperature of the heating element can be raised both in the first temperature and in the second temperature. The temperature can be raised by any suitable method. For example, the temperature can be raised by conduction caused by contact with another source of heat. The temperature can be raised by inductive heating caused by a floating electromagnetic field. The temperature can be raised by resistive heating caused by the passage of an electric current through a conductive wire or resistive track. In one embodiment, the track can have a resistance between 0.5 and 5 ohms.
    [0025] Preferably, the heating element comprises a rigid electrically insulating substrate with a track or electrically conductive wire disposed on its surface. Preferably, the size and shape of the electrically insulating substrate allows it to be inserted directly into an aerosol-forming substrate. If the electrically insulating substrate is not sufficiently rigid, the heating element may comprise an additional reinforcement. A current can be passed through the track or wire to heat the heating element and the aerosol forming substrate.
    [0026] It is preferable that the aerosol generating device additionally comprises electronic circuits arranged to control the current supply to the heating element to control the temperature. The aerosol generating device may also comprise a means for detecting the temperature of the heating element. This can allow electronic circuits or control circuits to raise the temperature of the heating element at both the first and the second temperature. It is preferred that the first temperature is a temperature high enough to produce the evolution of volatile compounds from the aerosol-forming substrate and, therefore, the formation of an aerosol. It is preferred that the first temperature is not high enough to burn the aerosol-forming substrate.
    [0027] Preferably, the first temperature is lower than about 375 degrees Fahrenheit. For example, the first temperature can be between 80 degrees Fahrenheit and 375 degrees Fahrenheit, for example, between 100 degrees Fahrenheit and 350 degrees Fahrenheit. The length of time that the heating element is maintained at the first temperature can be fixed. For example, the first temperature can be maintained for a period longer than 2 seconds, for example, between 2 seconds and 10 seconds. The length of time that the heating element is maintained at the first temperature can be variable. For example, the aerosol generating device may comprise a sensor that will determine when a user is swallowing the smoking article, and the time can be controlled by the length of time the user brings the smoking article.
    [0028] During a period in which the heating element is in contact with the aerosol-forming substrate, the heating element goes through a thermal cycle during which it is heated to the first temperature and then cooled. The heating element is preferably cooler than the first temperature when it is removed from contact with the aerosol-forming substrate. During contact, particles of the aerosol-forming substrate can be adhered to a surface of the heating element. In addition, volatile compounds and aerosols emitted by the heat of the heating element can be deposited on a surface of the heating element. Particles and compounds adhered to and deposited on the heating element can prevent the heating element from working optimally. These particles and compounds can also rupture when using the aerosol generating device and impart unpleasant or bitter aromas to a user. For these reasons, it is desirable to clean the heating element periodically.
    [0029] It is preferred that the second temperature is a temperature high enough to thermally release organic compounds that are in contact with the heating element. Organic compounds can be any particles or compounds adhered to or deposited on a surface of the heating element during a period of contact between the heating element and a substrate.
    [0030] The thermal release of organic compounds can occur by pyrolysis. Pyrolysis is a process in which chemical compounds are decomposed due to the action of heat. Organic compounds are generally pyrolysed to form vapors and organic liquids, which, in the present specification, can migrate away from the heating element leaving it in a clean state.
    [0031] It is preferred that organic materials in the heating element are thermally released by raising the temperature of the heating element by about 430 degrees centigrade or more. For example, the temperature can be raised to more than 475 degrees Fahrenheit or more than 550 degrees Fahrenheit. The temperature can be raised to higher temperatures, such as greater than 600 degrees Fahrenheit or greater than 800 degrees Fahrenheit.
    [0032] It is preferable that the heating element is kept at the second temperature for a period of time to effect the thermal release of organic compounds. For example, the heating element can be kept at the second temperature for more than 5 seconds. Preferably, the heating element is maintained at the second temperature for a period of between 5 seconds and 60 seconds, for example, between 10 seconds and 30 seconds.
    [0033] Smoking articles for use with aerosol generating devices comprise an amount of an aerosol-forming substrate. The aerosol-forming substrate can be consumed entirely during a single thermal cycle of the heating element. In such an embodiment, the heater will be constantly on and the temperature will be regulated by the amount of energy supplied to the heating element during operation. This may be the case, for example, if the heating element is kept at the first temperature during consumption of the smoking article. Alternatively, the heating element is repeatedly pulsed through thermal cycles to the first temperature and in return. These pulses may occur simultaneously with periods, when a user is swallowing the smoking article. A portion of aerosol is generated each time the temperature reaches the first temperature and aerosol generation ceases each time the heating element is cooled again. When no additional aerosol is generated, the smoking article will have been consumed. Thus, there can be more than 5 or more than 10 or more than 15 thermal cycles in which the heating element is raised at the first temperature and then cooled down before the smoking article is consumed.
    [0034] A user can remove a consumed smoking article and replace it with a new non-consumed smoking article without performing the step of raising the temperature of the heating element to the second temperature. In other words, the user can consume more than one item before performing a cleaning step to thermally release organic materials from the heating element.
    [0035] In this way, the temperature of the heating element can be raised at the first temperature a plurality of times before the step of raising the heating element at the second temperature is carried out.
    [0036] The step of raising the temperature of the heating element to the second temperature to thermally release organic materials adhered to or deposited on the heating element can be called a cleaning step.
    [0037] The cleaning step can be triggered manually by a user. For example, a user may decide that the heating element needs to be cleaned and trigger a cleaning cycle in which the heating element is raised to the second temperature for a predetermined period of time. The activation can be carried out with the press of a button on the aerosol generating device. Preferably, the cleaning cycle is terminated automatically after a predetermined or pre-programmed thermal cycle.
    [0038] The aerosol generating device may comprise a detection means for determining whether or not a smoking article is engaged with the aerosol generating device. If a smoking article is engaged, preferably the aerosol generating means will comprise a control means, for example, control software that acts to prevent the heating element from being heated to the second temperature, thereby preventing the cleaning cycle is triggered while a smoking article is engaged with the aerosol generating device.
    [0039] The cleaning step can be triggered automatically. For example, the aerosol generating device may comprise a means for detecting when the heating element is removed from contact with the aerosol forming substrate, for example, when a smoking article is removed from the device. When such an event is detected, the heating element can automatically occur in cycles through a cleaning regime in which the heating element is heated at the second temperature for a period of time.
    [0040] The control means associated with the aerosol generating device can record the number of smoking articles consumed by a user and automatically trigger a cleaning cycle after a predetermined number of smoking articles have been consumed.
    [0041] In some embodiments, an aerosol generating device may comprise a battery to provide energy to heat the heating element. It may be advantageous, if the aerosol generating device is associated with a docking station to recharge the battery and for other functions. It may be advantageous for a cleaning cycle to be triggered when the aerosol generating device is anchored in a docking station. The docking station may be able to supply more power to the heating element than the aerosol generating device, and the second temperature may therefore be higher. A higher second temperature can result in a more efficient and faster cleaning process.
    [0042] In one aspect, the specification can provide an aerosol generating device comprising a heating element coupled to a controller. The controller is programmed to drive the heating element through a first thermal cycle in which the temperature of the heating element is raised to a first temperature lower than about 400 degrees Fahrenheit in order to produce an average temperature of 375 degrees Fahrenheit on the surface of the heating element and a maximum temperature anywhere on the surface, that is, a maximum localized temperature, of 420 degrees centigrade. This allows an aerosol to be formed from an aerosol-forming substrate disposed in the vicinity of the heating element without burning the aerosol-forming substrate. The controller is additionally programmed to drive the heating element through a second thermal cycle in which the temperature of the heating element is raised to a second temperature higher than about 430 degrees centigrade in order to thermally release the organic material deposited in the heating element.
    [0043] Preferably, the first temperature is greater than 80 degrees centigrade. For example, the first temperature is greater than 80 degrees Fahrenheit. For example, the first temperature can be between 80 degrees Fahrenheit and 375 degrees Fahrenheit, or between 100 degrees Fahrenheit and 350 degrees Fahrenheit.
    [0044] The aerosol generating device can be any device for performing a method described above. For example, the aerosol generating device can be any device comprising a controller programmed to perform a method described above or defined in the claims.
    [0045] The controller can be housed by the aerosol generating device. Alternatively, the controller can be housed within an anchoring station that is attachable to the aerosol generating device and thus to the heating element of the aerosol generating device.
    [0046] In one aspect, the specification may provide a kit comprising an aerosol generating device suitable for receiving a smoking article and comprising a heating element, the kit additionally comprising instructions for cleaning the heating element by thermally releasing material adhered or deposited in the heating element. The instructions can describe how to thermally release organic material, for example, by heating. The instructions can describe how a user should activate an automatic cleaning cycle programmed into the aerosol generating device.
    [0047] A kit may comprise an anchoring station that is attachable to the aerosol generating device. The instructions can describe how a user should activate an automatic cleaning cycle programmed at the dock.
    [0048] A kit can additionally comprise one or more smoking articles. A kit may include instructions for performing any method described above or defined in the claims.
    [0049] Features described in relation to an aspect of the specification may also be applicable to other embodiments discussed here. Exemplary embodiments
    [0050] Exemplary embodiments will now be described with reference to the figures, in which: Figure 1 is a schematic cross section diagram of a first embodiment of an aerosol generating device coupled with a smoking article; Figure 2 is a schematic diagram illustrating a heating element for the first embodiment of an aerosol generating device; Figure 3A is an illustration showing a heating element for the first embodiment of an aerosol generating device with a surface that has become soiled with organic components; Figure 3B is an illustration showing the heating element of Figure 3A after the organic components have been thermally released; Figure 4 is a flow diagram that illustrates a first embodiment of a method; Figure 5 is a block diagram illustrating the configuration of an aerosol generating device; and Figure 6 is a flow diagram that illustrates a second embodiment of a method.
    [0051] Figure 1 illustrates a portion of an aerosol generating device 10 according to a first embodiment. The aerosol generating device 10 is engaged with a smoking article 20 for consumption of the smoking article 20 by a user.
    [0052] The smoking article 20 comprises four elements, an aerosol forming substrate 30, a hollow tube 40, a transfer section 50, and a mouthpiece filter 60. These four elements are arranged sequentially in coaxial alignment and are assembled by a cigarette paper 70 to form a stem 21. The stem has a mouth end 22, which a user inserts into his mouth during use, and a distal end 23 located at the opposite end of the stem at the mouth end 22. Elements located between the mouth end 22 and the distal end 23 can be described as upstream of the mouth end or, alternatively, downstream of the distal end.
    [0053] When assembled, the rod 21 is 45 mm long and has a diameter of 7.2 mm.
    [0054] The aerosol-forming substrate 30 is located upstream of the hollow tube 40 and extends to the distal end 23 of the rod 21. The aerosol-forming substrate comprises a crimped reconstituted tobacco bundle wrapped in filter paper (no shown) to form a plug. Reconstituted tobacco includes additives, including glycerin as an aerosol-forming additive.
    [0055] The hollow tube 40 is located immediately downstream of the aerosol forming substrate 30 and is formed from a cellulose acetate tube. Tube 40 defines an opening having a diameter of 3 millimeters. A function of the hollow tube 40 is to locate the aerosol forming substrate 30 towards the distal end 23 of the stem 21 so that it can be in contact with a heating element. The hollow tube 40 acts to prevent the aerosol-forming substrate 30 from being forced along the rod towards the mouth end 22 when a heating element is inserted into the aerosol-forming substrate 30.
    [0056] The transfer section 50 comprises a thin-walled tube 18 mm long. The transfer section 50 allows volatile substances released from the aerosol-forming substrate 30 to pass along the stem 21 towards the mouth end 22. The volatile substances can be cooled within the transfer section to form an aerosol.
    [0057] The nozzle filter 60 is a conventional nozzle filter formed from cellulose acetate, and having a length of 7.5 mm.
    [0058] The four elements identified above are assembled and are tightly wrapped within a cigarette paper 70. The paper, in this specific embodiment, is a standard cigarette paper having standard properties or classification. For example, paper can be a porous material with a non-isotropic structure comprising cellulose fibers (streaked with 's' fibers, interconnected by H bonds), fillers and combustion agents. The filling agent may be CaCO3 and the burning agents may be one or more of the following: K / Na citrate, Na acetate, MAP (monoammonium phosphate), DSP (disodium phosphate). The final composition per square meter can be approximately 25 g of fiber + 10 g of calcium carbonate, + 0.2 g of burning additive. The porosity of the paper can be between 0 to 120 Coresta. The interface between the paper and each of the elements locates the elements and defines the rod 15 of the smoking article 1.
    [0059] The interface between the paper and each of the elements locates the elements and defines the rod 21 of the smoking article 20. Although the specific embodiment described above and illustrated in Figure 1 presents five elements mounted on a cigarette paper, it will now be clear to one skilled in the art that a smoking article, according to the embodiments discussed here, may have additional elements and these elements may be mounted in an alternative or equivalent cigarette wrapper. Likewise, a smoking article according to the invention may have fewer elements. In addition, it will now be evident to those skilled in the art that the various dimensions for the elements discussed in relation to the various embodiments discussed here are merely exemplary, and that suitable alternative dimensions for the various elements can be chosen without departing from the spirit of the embodiments discussed here.
    The aerosol generating device 10 comprises a case 12 for receiving the smoking article 20 for consumption. A heating element 90 is located inside the case 12 and positioned to be engaged with the distal end 23 of the smoking article. The heating element 90 is in the form of a blade that ends at a tip 91.
    [0061] As the smoking article 20 is pushed into the case 12, the tip 91 of the heating element 90 is engaged with the aerosol forming substrate 30. With the application of a force to the smoking article, the element heating element 90 penetrates the aerosol forming substrate 30. Once properly located, further penetration is prevented as the distal end 23 of the smoking article 20 rests on an end wall 17 of the case 12, which acts as a stop.
    [0062] When the smoking article 20 is properly engaged with the aerosol generating device 10, the heating element 90 will have been inserted into the aerosol forming substrate 30.
    [0063] Figure 2 illustrates a heating element 90, as understood in the aerosol generating device 10 of Figure 1 in greater detail. The heating element 90 is substantially in the form of a blade. That is, the heating element has a length that, in use, extends along the longitudinal axis of a smoking article engaged with the heating element, a width and a thickness. The width is greater than the thickness. The heating element 90 ends at a point or spike 91 to penetrate a smoking article 20. The heating element comprises an electrically insulating substrate 92, which defines the shape of the heating element 90. The electrically insulating material can be, for example , alumina (AL2O3), stabilized zirconia (ZrO2). It will be apparent to one skilled in the art that the electrically insulating material can be any suitable electrically insulating material and that many ceramic materials are suitable for use as the electrically insulating substrate.
    [0064] Tracks 93 of an electrically conductive material are coated on an insulating substrate surface 92. Tracks 93 are formed of a thin layer of platinum. Any suitable conductive material can be used for the trails, and the list of suitable materials includes many metals, including gold, which are well known to those skilled in the art. One end of tracks 93 is coupled to a power source by a first contact 94, and the other end of tracks 93 is coupled to a power supply by a second contact 95. When a current is passed through tracks 93, heating resistive will occur. This heats the entire heating element 90 and the surrounding environment. When a current passing through tracks 93 of heating element 90 is deactivated, there will be no resistive heating and the temperature of heating element 90 will be rapidly decreased.
    [0065] The heating element 90 also includes the collar 96. The collar 96 can be formed of a suitable material that allows the conduction of electricity, provided that the design of the collar 95 is also selected to minimize resistive heating. In one embodiment, when tracks 93 are formed of platinum or a platinum alloy, necklace 96 may be formed of gold or silver, or an alloy including any of the alternatives. Due to the difference in electrical resistivity of the collar material 96, less heat is generated over the collar area, and collar 96 detects a lower average temperature than the portion of the heating element 90 including the tracks 96. In another embodiment, the collar 96 may be formed of an insulating material, such as a ceramic or other suitable insulator.
    [0066] The collar 96 provides a cold zone, as compared to the average surface temperature of the portion of the heating element 90 that includes tracks 93. For example, the average temperature of the cold zone can be greater than 50 degrees centigrade cooler than the average surface temperature of the heating element portion 90 including tracks 93 during operation. The inclusion of collar 96 can provide numerous benefits including the fact that it reduces the temperature detected by any electronics on board. In addition, collar 96 will protect against melting or degrading various portions of device 10, when materials, such as plastic, are used in the device. The collar also reduces condensation at the distal end of the device because such an aerosol is cooled as it passes over collar 96. This reduction in condensation seen by the electronics (not shown) and contacts 94 and 95 included in device 10 helps to protect such elements.
    [0067] The aerosol generating device 10 comprises a power supply and electronics (not shown) that allow the heating element 90 to be activated. Such actuation can be manually operated or can occur automatically in response to a user who brings the smoking article. When the heating element is activated, the aerosol forming substrate will be heated and volatile substances will be generated or emitted. As a user brings the mouth end of the smoking article 20, air is drawn into the smoking article and the volatile substances are condensed to form an inhalable aerosol. This aerosol passes through the mouth end 22 of the smoking article and into the user's mouth.
    [0068] In a specific embodiment (schematically illustrated in Figure 5), an aerosol generating device comprises a processor or controller 19 coupled to a heating element 90 to control the heating of the heating element. Controller 19 is programmed to drive the heating element through a first thermal cycle in which the temperature of the heating element is raised to a first temperature of 375 degrees centigrade. This allows for the formation of an aerosol from an aerosol forming substrate disposed in the vicinity of the heating element. The controller is additionally programmed to drive the heating element through a second thermal cycle in which the temperature of the heating element is raised to a second temperature of 550 degrees centigrade for a period of 30 seconds. This allows the organic material deposited on the heating element to be decomposed or pyrolyzed.
    [0069] A specific embodiment of a method of using an aerosol generating device will now be described with reference to Figures 1 to 2. Figure 4 is a flow diagram showing the steps taken in one embodiment of the process of the invention.
    [0070] Step 1 - (Reference numeral 100 in Figure 4): A heating element 90 of an aerosol generating device 10 is brought into contact with an aerosol forming substrate 30 contained within a smoking article 20 In order to achieve this, the smoking article 20 is inserted into a case 12 of the aerosol generating device 10. A heating element 90 is located within the case 12, and protrudes from a lower surface 17 of the case 12 such that it can be inserted into any smoking article that is received in the case. As the smoking article 20 is slid in the case 12, an end or end 91 of the heating element 90 comes into contact with a distal end 23 of the smoking article. The further movement of the smoking article towards the lower end 17 of the case causes the heating element 90 to penetrate an aerosol forming substrate located at the distal end 23 of the smoking article 20. Once the smoking article has fully inserted into the case, the distal end 23 of the smoking article rests on the bottom surface 17 of the case 12 and the heating element achieves maximum penetration.
    [0071] Step 2 - (Reference numeral 200): As the user brings or puffs on a mouth end 22 of the smoking article 20, sensors in the aerosol generating device 10 can detect this event. In the case of detecting a user who puffs or puffs, a controller 19 sends instructions that activate the heating element to heat at a first temperature. A current is passed through conductive tracks 93 arranged in the heating element, which results in resistive heating of the heating element. The first temperature is 375 degrees centigrade, which is sufficient to release volatile compounds from the aerosol-forming substrate 20. These volatile compounds are condensed to form an inhalable aerosol, which is swallowed through the smoking article and into a user's mouth. . Alternatively, continuous heating can be used during the operation of the device 10 and the detection of a user puff or puff can be used to trigger the heating to compensate for any temperature drop of the heating element 90 during the puff or puff of the user. .
    [0072] Step 3 - (Reference numeral 300): When the user stops swallowing or finishes his puff at the mouth end 22 of the smoking article 20, sensors in the aerosol generating device will detect this event. The controller 19 sends instructions to deactivate the current that passes through the heating element 90. This stops the heating element from the tracks 93, and the temperature of the heating element 90 is rapidly decreased. As the temperature is lowered, the aerosol stops being generated. Alternatively, during the continuous heating discussed above, controller 19 may instead simply reduce the amount of energy detected during the user's puff or puff, based on a desired setpoint temperature.
    [0073] If the aerosol forming substrate 30 still contains volatile compounds, the user can take another puff on the smoking article 20 and repeat step 2 (indicated by arrow 350 in Figure 4). Steps 2 and 3 can be repeated as often as necessary to consume the smoking article.
    [0074] Step 4 - (Reference numeral 400): When the user has finished with the smoking article 20, for example, when no more aerosol is generated by heating the aerosol forming substrate 30, the smoking article 20 will be removed from the case 12 of the aerosol generating article 10. This indicates that the heating element 90 is removed from contact with the aerosol-forming substrate 30. Almost inevitably, the heating element 90 will have become dirty with some deposits or derived waste aerosol-forming substrate 30. Such deposits may impair the performance of the heating element. For example, deposits on the heating element may inhibit heat transfer between the heating element and the aerosol-forming substrate. Deposits on a heating element may also inhibit temperature detection, when the heating element is used to detect the temperature. Deposits in a heating element may also generate bitter compounds on repeated heating, which can impair the aroma of aerosols generated when consuming subsequent smoking articles.
    [0075] If a user detects that the deposits in the heating element are at a low enough level, he may decide to consume an additional smoking article. In this case, steps 1 through 4 can be repeated. This is indicated by the arrow 450 in Figure 4.
    [0076] Step 5 - (Reference numeral 500): If a user believes that the heating element needs cleaning, then he will press a button (not shown) on the aerosol generating device 10 that causes the controller to activate a cleaning cycle. During the cleaning cycle, the current is passed through the tracks 93 of the heating element 90 to raise the temperature of the heating element to a second temperature. This second temperature is 550 degrees centigrade, a temperature at which deposits on the heating element can be thermally degraded or pyrolyzed. The heating element 90 is maintained at a temperature of 550 degrees centigrade for a period of 30 seconds to thermally release the organic compounds deposited on the heating element 90.
    [0077] Figure 3A illustrates a portion of an aerosol generating device. This figure illustrates a heating element 90 after using the device to consume the smoking article. That is, Figure 3A illustrates a heating element 90 of an aerosol generating device after step 4 of the method described above. It can be seen that the heating element 90 is coated in organic deposits, which appear in black in Figure 3A.
    [0078] Figure 3B illustrates the same heating element, as shown in Figure 3A after the performance of a cleaning cycle, as described by step 5 above. That is, the heating element 90 of Figure 3A was heated to a temperature of 550 degrees centigrade and maintained at that temperature for a period of 30 seconds. It can be seen that the black deposits visible in Figure 3A have been removed and the heating element has been cleaned. In Figure 3B, the heating element now has a shiny appearance where organic deposits have been removed.
    [0079] After cleaning, the aerosol generating device is ready for use. Steps 1 through 5 can be repeated. This is indicated by the arrow 550 in Figure 4.
    [0080] In the embodiment of a method described above, the step of heating the heating element to a first temperature to produce an aerosol occurred when the device detected a user puffing. In other embodiments, a user can manually activate the heating element to produce an aerosol.
    [0081] In the realization of a method described above, the step of starting a cleaning cycle was manually activated. In other embodiments, a cleaning cycle can be automatically triggered each time a smoking article is removed from the aerosol generating device.
    [0082] The aerosol generating device 10 can be used in conjunction with a docking station (not shown). A docking station can be used, for example, to recharge the batteries used to power the aerosol generating device. Figure 6 illustrates an embodiment of a method that can be used when the aerosol generating device is coupled to a docking station.
    [0083] Steps 1 to 4 are the same as those described above in relation to Figure 4. Figure 6 uses the same reference numerals for steps that are the same as those previously described.
    [0084] Step 5 - (Reference numeral 600): The aerosol generating device 10 is coupled to an anchoring station (not shown) to receive the device.
    [0085] Step 6- (Reference Number 700): When the aerosol generating device 10 is detected, a controller will activate a cleaning cycle. During the heating cycle, current is passed through tracks 93 of heating element 90 to raise the temperature of the heating element to a second temperature. This second temperature is 550 degrees centigrade, a temperature at which deposits on the heating element can be thermally degraded or pyrolyzed. The heating element 90 is maintained at a temperature of 550 degrees centigrade for a period of 30 seconds to thermally release the organic compounds deposited on the heating element 90. In one embodiment, the controller can be fired from a docking station signal indicating that the device has not been cleaned after a predetermined number of uses, for example, the user has come into contact with the heating element 90 10 or more times without performing a cleaning cycle. Controller 19 can then force the user to perform a cleaning cycle. For example, the user may be prohibited from activating heating element 90, unless a cleaning cycle is first performed. Controller 19 may contain instructions for locking device 10 or the docking station may maintain information regarding use and provide locking and unlocking instructions for controller 19.
    [0086] Step 7 - (Reference numeral 800): The aerosol generating device is removed from the docking station. The aerosol generating device is ready for use. Steps 1 through 7 can be repeated. This is indicated by the arrow 850 in Figure 6.
    [0087] The exemplary embodiments described above illustrate, but do not limit the invention. In view of the exemplary embodiments discussed above, other embodiments consistent with the above exemplary embodiments will now be apparent to those skilled in the art.
    权利要求:
    Claims (13)
    [0001]
    1. Method of using an aerosol generating device (10) featuring a reusable heating element (90), comprising the steps of bringing the heating element (90) into contact with an aerosol-forming substrate (30) , raise the temperature of the heating element (90) to a first temperature to heat the aerosol forming substrate (30) sufficiently for an aerosol to be formed, remove the heating element (90) from contact with the heating substrate aerosol formation (30), and characterized by the fact that it still comprises: raising the temperature of the heating element (90) to a second temperature, higher than the first temperature, to thermally release organic materials adhered or deposited on the heating element heating (90).
    [0002]
    2. Method of using an aerosol generating device (10), according to claim 1, characterized by the fact that the organic materials deposited in the heating element (90) are thermally released as the temperature of the heating element rises (90) for a second temperature greater than about 430 degrees Fahrenheit.
    [0003]
    3. Method of using an aerosol generating device (10) according to claim 1 or 2, characterized by the fact that the heating element (90) is maintained at the second temperature for a period of between 5 seconds and 60 seconds.
    [0004]
    4. Method of using an aerosol generating device (10) according to any one of the preceding claims, characterized in that the aerosol-forming substrate (30) comprises tobacco.
    [0005]
    5. Method of using an aerosol generating device (10) according to any one of the preceding claims, characterized by the fact that an aerosol is formed as a result of heating the heating element (90) to a first average temperature between 80 degrees centigrade and 375 degrees centigrade with a maximum localized temperature of 420 degrees centigrade while in contact with the aerosol-forming substrate (30).
    [0006]
    6. Method of using an aerosol generating device (10) according to any one of the preceding claims, characterized by the fact that the step of raising the temperature of the heating element (90) to a first temperature to heat the substrate forming aerosol (30) sufficiently to form an aerosol is performed two or more times before the step of raising the temperature of the heating element (90) to a second temperature, higher than the first temperature, to thermally release organic materials adhered to or deposited on the heating element (90).
    [0007]
    7. Method of using an aerosol generating device (10) according to any one of the preceding claims, characterized by the fact that the step of raising the temperature of the heating element (90) to a second temperature, higher than that the first temperature, to thermally release organic materials adhered to or deposited in the heating element, occurs automatically when the aerosol forming substrate (30) is removed from contact with the heating element (90).
    [0008]
    8. Method of using an aerosol generating device (10) according to any one of claims 1 to 6, characterized in that the step of raising the temperature of the heating element to a second temperature, higher than the first temperature, to thermally release organic materials adhered to or deposited on the heating element, occurs in response to a trigger triggered by a user.
    [0009]
    9. Method of using an aerosol generating device (10) according to any one of claims 1 to 6, characterized in that the aerosol generating device (10) is attachable to an anchoring station, in which the step of raising the temperature of the heating element (90) to a second temperature, higher than the first temperature, to thermally release organic materials adhered to or deposited on the heating element will occur, when the aerosol generating device (10) is attached to the docking station.
    [0010]
    An aerosol generating device (10), for carrying out a method as defined in any one of claims 1 to 9, the device comprising a heating element (90) coupled to a controller (19), in which the controller (19 ) is programmed to drive the heating element (90) through a first thermal cycle in which the temperature of the heating element is raised to a first temperature lower than about 375 degrees centigrade to form an aerosol of a forming substrate aerosol spray (30) disposed in the vicinity of the heating element (90), and characterized by the fact that the controller (19) is programmed to drive the heating element (90) through a second thermal cycle in which the temperature of the element heating element (90) is raised to a second temperature higher than about 430 degrees centigrade to thermally release organic material adhered to or deposited on the heating element (90).
    [0011]
    11. Aerosol generating device (10) according to claim 10, characterized by the fact that the first average temperature is between 80 degrees centigrade and 375 degrees centigrade with a maximum localized temperature of 420 degrees centigrade.
    [0012]
    12. Kit, characterized in that it comprises an aerosol generating device (10) as defined in claim 10 or 11, for receiving a smoking article (20) and instructions for cleaning, as defined in any of claims 1 to 9, a heating element (90) of the aerosol generating device (10) with heating the heating element (90) at a temperature sufficient to thermally release organic material adhered to or deposited on the heating element (90).
    [0013]
    13. Kit according to claim 13, characterized in that it additionally comprises one or more smoking articles (20).
    类似技术:
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    BR112014015517B1|2021-02-09|method of using an aerosol generating device, aerosol generating device and kit
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    KR102370640B1|2022-03-04|Improved extractor for an aerosol-generating device
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    RU2624720C2|2017-07-05|
    BR112014015517A8|2017-07-04|
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    JP2018033466A|2018-03-08|
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    PH12014501190B1|2014-09-08|
    SI3103357T1|2018-04-30|
    CA2858483A1|2013-07-04|
    WO2013098411A1|2013-07-04|
    EP3311685B1|2021-03-24|
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    ES2664363T3|2018-04-19|
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    KR20140116381A|2014-10-02|
    JP6983267B2|2021-12-17|
    HUE029795T2|2017-04-28|
    TW201334716A|2013-09-01|
    HK1253556A1|2019-06-21|
    LT3103357T|2018-04-10|
    HK1198109A1|2015-03-13|
    RU2725464C2|2020-07-02|
    PH12014501190A1|2014-09-08|
    CN104023574B|2017-04-12|
    ZA201403919B|2016-07-27|
    HUE039612T2|2019-01-28|
    KR20170134773A|2017-12-06|
    KR102257953B1|2021-05-31|
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    JP6051232B2|2016-12-27|
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    US20200352224A1|2020-11-12|
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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]|
    2020-08-04| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-11-24| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-02-09| 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 28/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11196235.3A|EP2609821A1|2011-12-30|2011-12-30|Method and apparatus for cleaning a heating element of aerosol-generating device|
    EP11196235.3|2011-12-30|
    PCT/EP2012/077093|WO2013098411A1|2011-12-30|2012-12-28|Method and apparatus for cleaning a heating element of aerosol generating device|
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