WO2024017627A1 - Cartouche pour dispositif de génération de vapeur et dispositif de génération de vapeur - Google Patents

Cartouche pour dispositif de génération de vapeur et dispositif de génération de vapeur Download PDF

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Publication number
WO2024017627A1
WO2024017627A1 PCT/EP2023/068445 EP2023068445W WO2024017627A1 WO 2024017627 A1 WO2024017627 A1 WO 2024017627A1 EP 2023068445 W EP2023068445 W EP 2023068445W WO 2024017627 A1 WO2024017627 A1 WO 2024017627A1
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WO
WIPO (PCT)
Prior art keywords
cartridge
thermal
liquid
heater
joint compound
Prior art date
Application number
PCT/EP2023/068445
Other languages
English (en)
Inventor
Tilen CEGLAR
Jaakko MCEVOY
Original Assignee
Jt International Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jt International Sa filed Critical Jt International Sa
Publication of WO2024017627A1 publication Critical patent/WO2024017627A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—Cartridges or containers for inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/44—Wicks
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/10—Devices using liquid inhalable precursors

Definitions

  • the present invention relates generally to a vapour generating device, such as an electronic cigarette.
  • the invention relates particularly, but not exclusively, to a cartridge for an electronic cigarette and to an electronic cigarette incorporating the cartridge.
  • Electronic cigarettes are an alternative to conventional cigarettes. Instead of generating a combustion smoke, they vaporize a liquid which can be inhaled by a user.
  • the liquid typically comprises an aerosol-forming substance, such as glycerine or propylene glycol, that creates the vapour when heated.
  • Other common substances in the liquid are nicotine and various flavourings.
  • the electronic cigarette is a hand-held inhaler system, typically comprising a mouthpiece section, a liquid store and a power supply unit. Vaporization is achieved in a vaporization zone by a vaporizer or heater unit which typically comprises a heating element in the form of a heating coil and a fluid transfer element such as a wick. Vaporization occurs when the heater heats the liquid in the wick until the liquid is transformed into vapour.
  • a vaporizer or heater unit typically comprises a heating element in the form of a heating coil and a fluid transfer element such as a wick. Vaporization occurs when the heater heats the liquid in the wick until the liquid is transformed into vapour.
  • Conventional cigarette smoke comprises nicotine as well as a multitude of other chemical compounds generated as the products of partial combustion and/or pyrolysis of the plant material.
  • Electronic cigarettes deliver primarily an aerosolized version of an initial starting e-liquid composition comprising nicotine and various food safe substances such as propylene glycol and glycerine, etc., but are also efficient in delivering a desired nicotine dose to the user.
  • Electronic cigarettes need to deliver a satisfying amount of vapour for an optimum user experience whilst at the same time maximizing energy efficiency.
  • WO 2017/179043 discloses an electronic cigarette comprising a disposable cartridge and a reusable base part.
  • the cartridge has a simplified structure which is achieved by keeping the main heating element in the re-usable base part, while the cartridge is provided with a heat transfer unit.
  • the heat transfer unit is configured to transfer heat from the heating element to the proximity of liquid in the cartridge to produce a vapour for inhalation by a user.
  • thermal contact between the reusable base part that contains the heat source and the fluid transfer medium, such as a ceramic wick in the disposable cartridge can prove difficult.
  • One manner in which this has been improved is by the provision of a deformable thermal interface membrane between the heater and the porous wick.
  • the membrane is configured to assist in rapid and even heating of the target in an accurate and defined geometry, reducing the amount of lateral thermal spreading (i.e. thermal losses).
  • a firm contact In order to have efficient heat transfer between the heater and the vaporization zone in the cartridge, a firm contact must be ensured between the components in contact with the thermal interface membrane. For example, a firm contact should be ensured between the heater and the thermal interface membrane on the one side, and between the wick and the thermal interface membrane on the opposing side. At minimum this requires precise alignment of components and high enough contact pressure between them.
  • the interconnecting parts of an electronic cigarette such as the cartridge and base part
  • the interconnecting parts of an electronic cigarette are typically made up of multiple different parts using different production methods (for example, injection moulding, deep drawing and stamping) all of which have their own associated tolerances.
  • These may be quite large (+ or - 100 pm) and when combined can result in relatively large variations in design dimensions. This can lead to poor coupling of components, leading to reduced control and operating efficiency of the device.
  • a cartridge for a vapour generating device configured to thermically connect to a base part having at least one heat source
  • the cartridge comprising: a liquid store for containing a vapour generating liquid and having a liquid outlet; a vaporization area in communication with the liquid store via the liquid outlet; a thermal interface membrane having a heater interface surface and configured, when the cartridge is thermically connected to the base part via the heater interface surface, to transfer heat from the heat source to effect vaporization of the vapour generating liquid; and a thermal joint compound disposed on the heater interface surface.
  • vapour is a substance in the gas phase at a temperature lower than its critical temperature, which means that the vapour can be condensed to a liquid by increasing its pressure without reducing the temperature
  • aerosol is a suspension of fine solid particles or liquid droplets, in air or another gas.
  • a thermal joint compound refers to a spreadable thermally conductive compound that may be used to reduce and preferably substantially eliminate air gaps or other spaces from a thermal interface in order to improve heat transfer when compared with an interface which is absent such compound.
  • a thermal joint compound may be provided as a grease, paste or gel.
  • a thermal joint compound may consist of a polymerizable liquid matrix having large volume fractions of electrically insulating, but thermally conductive filler. Typical matrix materials are epoxies, silicones, urethanes, and acrylates. Aluminium oxide, boron nitride, zinc oxide, and aluminium nitride are examples of suitable fillers.
  • a thermal joint compound may be metal-based, and may for example include metal particles (such as silver) suspended in a silicone/ceramic matrix or may comprise a liquid metal, such as the alloy galinstan.
  • the thermal joint compound may have a thermal conductivity of at least 0.5W/(mK), for example between 0.5W/(mK) and 13W/(mK).
  • the thermal joint compound may be a silicone- based compound or a metal based compound.
  • the thermal joint compound may comprise a layer applied to the thermal interface membrane.
  • the layer may be applied in bulk, such that it is spreadable across the heater interface surface when pressure is applied (e.g. pressure due to the cartridge being connected to a base part of the vapour generating device).
  • the thermal joint compound may have a maximum thickness of between 0.25mm and 1 mm.
  • the layer may be pre-spread across the heater interface surface. In such a case the thickness can be significantly smaller, for example between 50 and 100 pm. It should be noted that due to surface roughness the thickness of the layer of thermal joint compound may not be uniform. Thus the thermal joint compound is operable to even out the surface and thereby close the air gaps, while adding little additional thermal mass.
  • the thermal joint compound may be electrically insulating.
  • the thermal interface membrane may comprise a thin heat-conductive membrane, such as a metal foil or a metal/ceramic coating.
  • the thermal interface membrane may be fluid impermeable.
  • the cartridge may comprise a housing, and the thermal interface membrane may be recessed from a surface of the housing.
  • a base of the housing may comprise an aperture, and the thermal interface membrane may close the aperture in order to define the recess.
  • the thermal joint compound may be disposed in said recess.
  • the heater interface surface of the thermal interface membrane may comprise a heater footprint, which may be a portion of the thermal interface membrane that is in physical contact with the heat source when in use.
  • the thermal joint compound may be disposed only within the heater footprint.
  • the cartridge may further comprise a removable barrier disposed over and fully covering the thermal joint compound.
  • the removable barrier may comprise a peelable seal, such as a peelable foil or plastic seal, for example an aluminium foil.
  • the removable barrier may comprise a graspable feature such as a tab, perforation, aperture and/or protrusion, which may be grasped by a user in order to assist in removing the barrier.
  • a vapour generating device comprising a base part having at least one heat source having a contact surface and a power supply and a cartridge according to the first aspect of the invention thermically connected to the base part via the thermal interface membrane.
  • the thermal joint compound is operable to fill a space between the heater contact surface and the heater interface surface, and may spread or otherwise deform in order to fill said space.
  • the cartridge and the base part may include any one or more components conventionally included in a vapour generating device, such as the device described below in connection with Figure 1.
  • the cartridge may have a vapour flow channel extending from an inlet, through the vaporization area to the outlet.
  • the inlet may be provided at the base of the cartridge, at the side or at the top of the cartridge.
  • An appropriate channel flows from the inlet, through the vaporization area and to the outlet.
  • a fluid transfer medium e.g. a wick
  • the fluid transfer medium can be made of any material or a combination of materials being able to perform sorption and/or absorption of another material, and can be made, for example, of one or more of the following materials: fibre, glass, aluminium, cotton, ceramic, cellulose, glass fibre wick, stainless steel mesh, polyethylene (PE), polypropylene, polyethylene terephthalate (PET), poly(cyclohexanedimethylene terephthalate) (PCT), polybutylene terephthalate (PBT), polytetrafluoroethylene (PTFE), expanded polytetrafluoroethylene (ePTFE), and BAREX®, etc.
  • PE polyethylene
  • PET polypropylene
  • PET polyethylene terephthalate
  • PCT poly(cyclohexanedimethylene terephthalate)
  • PBT polybutylene terephthalate
  • PTFE polytetrafluoroethylene
  • ePTFE expanded poly
  • the fluid transfer medium of the cartridge comprises a porous ceramic wick positioned adjacent to an opening of the liquid store and arranged to hold and transfer vapour generating liquid from the liquid store to the thermal interface membrane by capillary action, wherein the pore size of the porous ceramic range from 100 nm to 40 pm.
  • the base part of the device may include a power supply unit, e.g. a battery, connected to the heat source.
  • the power supply unit electrically heats the heat source, such as a heating element, of the base part, which then provides its heat by conduction to a heat transfer unit, such as a thermal interface membrane of the type discussed above.
  • the heat transfer unit provides the heat to the fluid transfer medium resulting in vaporization of the liquid absorbed therein.
  • liquid from the liquid store is continuously absorbed by the transfer medium. Vapour created during the above process is transferred from the vaporization area via the vapour flow channel in the cartridge so that it can be inhaled via the outlet by a user of the device.
  • the cartridge may be disconnected from the base part and a new cartridge fitted, enabling the reuse of the base part.
  • the heat source of the base part may comprise a protruding heater extending from the base part so that, in use, the heater extends into a recess of the cartridge spreading the thermal joint compound between the heater contact surface and the heater interface surface.
  • the power supply unit may be a DC voltage source.
  • the power supply unit may be a Nickel-metal hydride battery, a Nickel cadmium battery, or a Lithium based battery, for example a Lithium-Cobalt, a Lithium-lron-Phosphate, a Lithium-Ion or a Lithium-Polymer battery.
  • the base part may further comprise a processor associated with electrical components of the electronic cigarette, including the battery.
  • the cartridge may further comprise: a cartridge housing at least partially including the liquid store and the vaporization area, and the vapour flow channel extending along the cartridge housing and in fluid communication with the vaporization area.
  • the cartridge housing may have a proximal end configured as a mouthpiece end which is in fluid communication with the vaporization area via the vapour flow channel and a distal end associated with the base part.
  • the mouthpiece end may be configured for providing the vaporized liquid to the user.
  • the liquid store may be provided in the main body of the cartridge with the vapour flow channel extending from an inlet at the base and one side of the cartridge, along the distal end of the cartridge to the vaporization area and up one side of the cartridge to the outlet located centrally at the mouthpiece end.
  • the liquid store may be disposed around the vapour outlet channel.
  • the cartridge housing may be made of one or more of the following materials: aluminium, polyether ether ketone (PEEK), polyimides, such as Kapton®, polyethylene terephthalate (PET), polyethylene (PE), high-density polyethylene (HOPE), polypropylene (PP), polystyrene (PS), fluorinated ethylene propylene (FEP), polytetrafluoroethylene (PTFE), polyoxymethylene (POM), polybutylene terephthalate (PBT), Acrylonitrile butadiene styrene (ABS), Polycarbonates (PC), epoxy resins, polyurethane resins and vinyl resins.
  • PEEK polyether ether ketone
  • polyimides such as Kapton®, polyethylene terephthalate (PET), polyethylene (PE), high-density polyethylene (HOPE), polypropylene (PP), polystyrene (PS), fluorinated ethylene propylene (FEP), polytetrafluor
  • the vapour generating device may comprise an electronic cigarette.
  • the term “electronic cigarette” may include an electronic cigarette configured to deliver an aerosol to a user, including an aerosol for inhalation/vaping.
  • An aerosol for inhalation/vaping may refer to an aerosol with particle sizes of 0.01 to 20 pm. The particle size may be between approximately 0.015 pm and 20 pm.
  • the electronic cigarette may be portable.
  • Figure 1 is a schematic cross-sectional view of a prior art electronic cigarette comprising a base part and a cartridge according to the prior art, shown with the base part and the cartridge disconnected;
  • Figure 2A schematically shows a cross-sectional view of a first cartridge disconnected from a base part
  • Figure 2B schematically shows a cross-sectional view of a second cartridge disconnected from a base part
  • Figure 3 schematically shows an interface between a heater unit and a thermal interface membrane in a prior art device
  • Figure 4 schematically shows an alternative interface between a heater unit and a thermal interface membrane
  • Figure 5 shows a partial perspective bottom view of a cartridge
  • Figure 6 shows a partial perspective bottom view of the cartridge of Figure 5 including a thermal joint compound
  • Figure 7 shows a partial perspective bottom view of the cartridge of Figures 5 and 6 including a peelable seal.
  • FIG. 1 there is shown one example of a vapour generating device according to the prior art, in the form of an electronic cigarette 10 for vaporizing a liquid held within a liquid storage portion.
  • the electronic cigarette 10 can be used as a substitute for a conventional cigarette.
  • the electronic cigarette 10 comprises a base part 12 and a cartridge 14 (also referred to in the art as a “capsule” or “pod”) thermically connectable to the base part 12.
  • the base part 12 is thus the main body part of the electronic cigarette and is preferably re-usable.
  • the base part 12 comprises a housing 16 accommodating therein a power supply unit in the form of a battery 18 connected to a heating element located at a first end of the housing 16.
  • the heating element is in the form of a rigid protruding heater unit 20 that protrudes out of the base part for partial receipt within the cartridge or capsule 14.
  • the first end of the housing 16 has an interface configured for matching a corresponding interface of the cartridge 14 and comprises a connector for mechanically coupling the cartridge 14 to the base part.
  • the battery 18 is configured for providing the heating element 20 with the necessary power for its operation, via contacts 24, allowing it to become heated to a required temperature.
  • the battery 18 is also connected to a controller 22, enabling the required power supply for its operation and the controller 22 is operationally connected to the heater unit 20.
  • the controller is located between the battery 18 and the heater 20 but it is to be appreciated that this arrangement is not compulsory and other arrangements of the components within the base part 12 are possible, such as the controller being located on an opposite side of the battery 18 to the heating element 20, wherein the battery 18 acts as a divider between the heating element 20 and other sensitive components of the electronic cigarette 10.
  • the cartridge 14 comprises a cartridge housing 27 having a proximal end 26 and a distal end 28.
  • the proximal end 26 may constitute a mouthpiece end configured for being introduced directly into a user's mouth.
  • a mouthpiece may be fitted to the proximal end 26.
  • the distal end 28 of the housing 27 comprises a base 29 into which the heater unit 20 protrudes when the cartridge 14 is connected to the base unit 12.
  • an aperture in the base 29 defines a recess at least a portion of the into which the heater unit 20 protrudes when connected.
  • the cartridge 14 further comprises a liquid storage portion, where the liquid storage portion comprises a liquid store or reservoir 25 configured for containing therein the liquid to be vaporized.
  • the liquid may comprise an aerosol-forming substance such as propylene glycol and/or glycerol and may contain other substances such as nicotine and acids.
  • the liquid may also comprise flavourings such as e.g. tobacco, menthol or fruit flavour.
  • the liquid store 25 extends between the proximal end 26 towards the distal end 28 and is spaced from the distal end 28.
  • a vapour transfer channel 32 extends from an inlet 30, across the distal end 28 of the cartridge and up the side of the cartridge to an outlet 34 located centrally in the proximal end 26 of the cartridge.
  • the inlet 30 is located in the base part 12, and fluidly connected to the remainder of the vapour transfer channel 32 in the cartridge 14 at a fluidly sealable joint 33. It will be appreciated that other configurations for the vapour outlet channel 32 are possible.
  • the liquid store 25 may surround, and coextend with, the vapour transfer channel 32, and/or the inlet 30 may be provided in the cartridge 14 rather than the base part 12.
  • the cartridge 14 is further provided with a porous wick 38 (or other fluid transfer medium) which extends between the liquid store 25 and the vapour transfer channel 32.
  • a porous wick 38 (or other fluid transfer medium) which extends between the liquid store 25 and the vapour transfer channel 32.
  • a vaporisation area 40 The area in which liquid is vaporised is termed herein a vaporisation area 40.
  • the vaporisation area 40 is a region within the porous wick 38 in which liquid is heated to a sufficiently high temperature to achieve vaporisation I aerosolization. Vaporised liquid may then be entrained in air within the airflow channel 32 as said air flows past the wick, for example during a user’s inhalation.
  • a thermal interface membrane 50 is provided between the heater 20 and the porous wick 38.
  • the membrane 50 is a thin membrane that is configured to ensure rapid and even heating of the vaporisation area in an accurate and defined geometry, reducing the amount of lateral thermal spreading (i.e. thermal losses).
  • Examples of a suitable thermal interface membrane 50 include a metal foil or a metal I ceramic coating on a surface of the wick 38.
  • the thermal interface membrane is preferably fluid impermeable.
  • the housings 16, 27 of both the cartridge 14 and base part 12 are typically made of rigid material for durability and this can create problems in providing a satisfactory connection between the heater unit 20 and thermal interface membrane 50.
  • Some prior art devices aim to address this problem by providing a flexible thermal interface membrane 50, which is able to deform, and so at least partially conform, to the shape of the heater unit 20 when a connection is made between the cartridge 14 and the base 12. Even so, manufacturing tolerances in the thermal interface membrane and/or the heater unit can mean that it is difficult to achieve the precise alignment of components that is needed, and high enough contact pressure between them, to result in efficient thermal transfer between the heater unit in the base part 12 and the vaporization area in the cartridge 14.
  • a thermal interface membrane 50 has two interface surfaces, a first heater interface surface 52, which is configured to be thermically connected to the heater unit 20, and a second wick interface surface, which is configured to be thermically connected to the wick 38.
  • Heat from the heater unit 20 may thus be transferred to the wick 38 through the thermal interface membrane 50 by conduction, convection and/or radiation (but primarily via conduction) when the cartridge is thermically connected to the base part 12 in order to transfer heat from the heat source to effect vaporization of the vapour generating liquid.
  • the cartridge housing 27 includes a recess 58, in which the heater unit 20 is at least partially received when the cartridge 14 is connected to the base unit 12.
  • the thermal interface membrane 50 defines at least a portion of a wall of the recess 58, such that when the heater unit 20 is received in the recess 58 a contact surface 54 of the heater unit is in thermal contact with that recess wall.
  • the wall of the recess thus comprises the heater interface surface 52 of the thermal interface membrane 50.
  • the contact surface 54 of the heater unit 20 (i.e. the portion of the heater surface which is in contact with the thermal interface membrane 50 when the heater unit 20 is received in the recess) defines a heater footprint on the heater interface surface 52.
  • the heater footprint has a perimeter which is substantially the same (e.g. in shape and/or surface area) as a perimeter of the contact surface 54.
  • the vapour generating device described herein additionally includes a thermal joint compound 56 disposed on the heater interface surface 52 of the thermal interface membrane 50.
  • Thermal joint compound (also known as thermal compound, thermal grease, thermal paste, thermal gel, heat paste, heat sink compound, heat sink paste or CPU grease) refers herein to a thermally conductive (but usually electrically insulating) chemical compound, which may be used to reduce, and preferably substantially eliminate, air gaps or spaces (which act as thermal insulation) from a thermal interface area in order to maximize heat transfer.
  • a thermal joint compound is compliant, and is able to spread when pressure is applied so as to fill in gaps or spaces within the thermal interface area that are due to differences in shape between the interfacing components.
  • thermal joint compound typically does not add mechanical strength to the joint between heater and thermal interface membrane, but instead improves thermal conductivity.
  • a mechanical fixation mechanism is needed to hold the joint in position. Such mechanical fixation can be performed by the connectors (not shown) which typically couple a cartridge 14 to a base 12, as discussed in relation to Figure 1.
  • a thermal joint compound may consist of a polymerizable liquid matrix having large volume fractions of electrically insulating, but thermally conductive filler.
  • Typical matrix materials are epoxies, silicones, urethanes, and acrylates. Aluminium oxide, boron nitride, zinc oxide, and aluminium nitride are examples of suitable fillers.
  • a thermal joint compound may be metal based, and may for example include metal particles (such as silver) suspended in a silicone/ceramic matrix or may comprise a liquid metal, such as the alloy galinstan.
  • the thermal joint compound 56 is silicone-based, as silicone- based pastes tend to have a safer chemical composition.
  • Thermal joint compounds may have thermal conductivity from less than 1 W/(m K) (silicone based) to more than 13 W/(m K) (metal based). In order to improve thermal efficiency, it is preferred that the thermal joint compound 56 has a thermal conductivity of at least 0.5 W/(m K), for example between 0.5 W/(m K) and 13 W/(m K), or between 0.5 W/(m K) and 5 W/(m K), or between 0.5 W/(m K) and 2 W/(m K), or between 1 W/(m K) and 5 W/(m K).
  • the contact surface 54 of the heater unit 20 defines a heater footprint on the thermal interface membrane 50.
  • the thermal joint compound 56 is applied to the heater interface surface 52 of the thermal interface membrane 50 only on the footprint of the heater. It will be appreciated however that this is not necessary, and the thermal joint compound may be applied to a larger area of the thermal interface membrane 50, if required.
  • the thermal joint compound 56 is provided as a layer on the heater interface surface 52 of the thermal interface membrane.
  • the thickness of the layer may depend on the configuration of the vapour generating device. In the examples shown, the thickness of the layer is less than a depth of the recess 58.
  • the thermal joint compound will spread and thin under the pressure of the connection. Ensuring that the layer has a thickness that is less than the depth of the recess prevents the thermal joint compound from escaping from the recess when the connection is made.
  • the thermal joint compound is applied in bulk in a central portion of the thermal interface membrane, such that the thermal joint compound is spread out by the heater unit 20 when the cartridge 14 is connected to the base part 12.
  • the thickness of the thermal joint compound may be between 0.25 and 1 mm at its thickest.
  • the thermal joint compound may be applied across an area smaller than the heater footprint.
  • the thermal joint compound may be applied to a plurality of discrete locations within the heater footprint, for example two, three or four locations, such that the thermal joint compound spreads to become a single layer when the cartridge 14 is connected to the base part 12.
  • the thermal joint compound is spread across the heater footprint of the thermal interface membrane in a thin layer.
  • the thickness of the thermal joint compound may be less that 0.25mm in maximum thickness, for example between 50 and 200 pm, or between 50 and 100 pm.
  • due to surface roughness the thickness of the thermal joint compound is not uniform when spread (whether pre-spread or spread under pressure of the connected parts).
  • the thermal joint compound 56 is optionally covered with a removable barrier 60 disposed over and fully covering the thermal joint compound.
  • the removable barrier 60 is operable to protect the pre-applied layer of thermal joint compound prior to use (e.g. during storage).
  • the removable barrier comprises a peelable seal, such as a peelable foil (e.g. aluminium foil).
  • the barrier 60 may include graspable feature 62 such as a protruding tab, which can assist a user in removing the barrier 60 prior to use.
  • thermal joint compound slightly increases the thermal mass of the system as a whole, it nevertheless improves the efficiency by reducing the thermal contact losses.

Abstract

L'invention concerne une cartouche (14) pour un dispositif de génération de vapeur (10). La cartouche (14) est conçue pour être reliée thermiquement à une partie base (12) ayant au moins une source de chaleur (20), et comprend : un réservoir de liquide (25) destiné à contenir un liquide de génération de vapeur et ayant une sortie de liquide ; une zone de vaporisation (40) en communication avec le réservoir de liquide par l'intermédiaire de la sortie de liquide ; une membrane d'interface thermique (50) ayant une surface d'interface de dispositif de chauffage (52) et conçue, lorsque la cartouche (14) est reliée thermiquement à la partie base (12) par l'intermédiaire de la surface d'interface de dispositif de chauffage (52), pour transférer la chaleur provenant de la source de chaleur (20) pour effectuer la vaporisation du liquide de génération de vapeur ; et un composé de joint thermique (56, 56a, 56b) disposé sur la surface d'interface de dispositif de chauffage (52).
PCT/EP2023/068445 2022-07-20 2023-07-04 Cartouche pour dispositif de génération de vapeur et dispositif de génération de vapeur WO2024017627A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22185936 2022-07-20
EP22185936.6 2022-07-20

Publications (1)

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WO2024017627A1 true WO2024017627A1 (fr) 2024-01-25

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017179043A1 (fr) 2016-04-13 2017-10-19 Md&C Creative Maison Sa Cigarette électronique
US20180279682A1 (en) * 2017-03-29 2018-10-04 Joyetech Europe Holding Gmbh Cartridge, battery assembly and electronic cigarette
US20200253282A1 (en) * 2020-03-05 2020-08-13 Hunan Jiayeda Electronic.,Ltd Atomizer
US20220117301A1 (en) * 2019-03-27 2022-04-21 Jt International S.A. Electronic Cigarette Cartridge with Compressible Wick
WO2023073191A1 (fr) * 2021-10-29 2023-05-04 Jt International Sa Dispositif de génération de vapeur réutilisable et dispositif de génération de vapeur avec fixation de cartouche

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017179043A1 (fr) 2016-04-13 2017-10-19 Md&C Creative Maison Sa Cigarette électronique
US11071324B2 (en) * 2016-04-13 2021-07-27 Md&C Creative Maison Sa Electronic cigarette having reusable base with heating element
US20180279682A1 (en) * 2017-03-29 2018-10-04 Joyetech Europe Holding Gmbh Cartridge, battery assembly and electronic cigarette
US20220117301A1 (en) * 2019-03-27 2022-04-21 Jt International S.A. Electronic Cigarette Cartridge with Compressible Wick
US20200253282A1 (en) * 2020-03-05 2020-08-13 Hunan Jiayeda Electronic.,Ltd Atomizer
WO2023073191A1 (fr) * 2021-10-29 2023-05-04 Jt International Sa Dispositif de génération de vapeur réutilisable et dispositif de génération de vapeur avec fixation de cartouche

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