WO2025003112A1 - Dispositif de génération d'aérosol comprenant une chambre à vide - Google Patents

Dispositif de génération d'aérosol comprenant une chambre à vide Download PDF

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Publication number
WO2025003112A1
WO2025003112A1 PCT/EP2024/067769 EP2024067769W WO2025003112A1 WO 2025003112 A1 WO2025003112 A1 WO 2025003112A1 EP 2024067769 W EP2024067769 W EP 2024067769W WO 2025003112 A1 WO2025003112 A1 WO 2025003112A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum chamber
heater
coating
electrical connections
aerosol generating
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2024/067769
Other languages
English (en)
Inventor
Eduardo Jose GARCIA GARCIA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JT International SA
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
Priority to EP24736435.9A priority Critical patent/EP4734780A1/fr
Priority to KR1020257040838A priority patent/KR20260003345A/ko
Priority to CN202480041110.4A priority patent/CN121368439A/zh
Publication of WO2025003112A1 publication Critical patent/WO2025003112A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • A24F40/46—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
    • A24F40/70—Manufacture
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • 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
    • A24F40/20—Devices using solid inhalable precursors

Definitions

  • the present invention relates to an aerosol generating device comprising a vacuum chamber. More specifically, the present invention relates to an aerosol generating device comprising a vacuum chamber, wherein a heater is disposed within the vacuum chamber.
  • vacuum state is maintained in the vacuum chamber so that heat transfer via gases in the chamber can be minimised.
  • the term vacuum used herein may not necessarily refer to a completely evacuated space.
  • the vacuum state within the vacuum chamber may be a low, mid, or high-grade vacuum. There may be some trace amounts of gases within the vacuum chamber, for example.
  • the vacuum state should be held at a sufficiently low pressure such that heat transfer from the heater to the outer surfaces of the device is reduced. A small quantity of heat transfer may be tolerated.
  • an aerosol generating device comprising: a vacuum chamber defined between a plurality of walls, the plurality of walls each having internal surfaces; and a heater provided on at least one of the walls of the vacuum chamber, wherein the heater is disposed within the vacuum chamber; one or more electrical connections, wherein the heater is electrically connected to a power source provided external to the vacuum chamber through at least one of the walls of the vacuum chamber using the one or more electrical connections; and a coating, wherein the coating is provided on one or more of the heater, the one or more electrical connections, and any of the internal surfaces, thereby to prevent outgassing into the vacuum chamber.
  • an aerosol generating device comprising: a vacuum chamber defined between a plurality of walls, the plurality of walls each having internal surfaces; and a heater provided on at least one of the walls of the vacuum chamber, wherein the heater is disposed within the vacuum chamber; one or more electrical connections, wherein the heater is electrically connected to a power source provided external to the vacuum chamber through at least one of the walls of the vacuum chamber using the one or more electrical connections; and a coating, wherein the coating is provided on the one or more electrical connections, thereby to prevent outgassing into the vacuum chamber.
  • the coating is provided on the heater and/or any of the internal surfaces.
  • components of aerosol generating devices can outgas when heated, which means that they can release gases.
  • Organic compounds in particular can decompose when heated to cause outgassing.
  • Heaters and the internal walls of the vacuum chambers may contain trace quantities of organic materials.
  • the materials forming the heaters and the internal walls may begin to decompose into gases when heated.
  • Solder, which is used to connect the electrical connections to the heaters often contains traces of flux and flux often comprises organic compounds such as naturally occurring resins.
  • Organic compounds in components of the device therefore may cause outgassing into the vacuum chamber during operation of the device, damaging the vacuum state of the vacuum chamber.
  • the vacuum state is a low-grade vacuum state
  • trace amounts of gases may be present within the vacuum chamber.
  • such a vacuum state may still be effective at preventing significant heat transfer. If outgassing were to occur into such a vacuum state, the amount of gas present within the vacuum chamber would increase and so would the gas pressure. In this scenario the gases outgassed into the vacuum chamber may start to transfer heat which would increase heat transfer to the exterior surfaces of the device.
  • the coating thickness may be selected in order to satisfy a number of competing interests.
  • a thin coating may be preferable in order to improve thermal insulation provided by the vacuum chamber.
  • the thickness of the coating must be thick enough to provide an impermeable cover that prevents the permeation of gas for an extended period of time, even under high temperature conditions. In some arrangements these factors may be balanced such that the thickness of the coating allows a vacuum state to be maintained for at least a selected time period. In one embodiment the selected time period may be around two years, or at least two years for ordinary use.
  • the one or more electrical connections comprise solder.
  • the electrical connections can easily be connected to the heater.
  • the solder can additionally be coated, thereby preventing outgassing directly from the solder into the vacuum chamber.
  • the vacuum chamber may be defined between an inner wall, an outer wall, an upper wall, and a lower wall.
  • the coating is provided on any of the inner, outer, upper, and lower walls. In this way, outgassing into the vacuum chamber from one or more regions of the walls of the vacuum chamber can be prevented.
  • the internal surfaces of the plurality of walls are those surfaces that face inwardly towards the vacuum chamber.
  • the heater is electrically connected to a power source that is provided externally to the vacuum chamber through the lower wall of the vacuum chamber using the one or more electrical connections.
  • a power source that is provided externally to the vacuum chamber through the lower wall of the vacuum chamber using the one or more electrical connections.
  • the heater may be electrically connected to the power source through any of the inner, outer, and upper walls of the vacuum chamber, or any combination thereof.
  • the heater may comprise a printed heating element.
  • the heater may be easily and securely provided on at least one of the walls of the vacuum chamber.
  • the heater is provided on the inner wall of the vacuum chamber. In this way, the size of the aerosol generating device can be reduced and its assembly can also be simplified.
  • the printed heater may comprise printed lead pads to which the one or more electrical connections can be connected.
  • the electrical connections may comprise pogo pins.
  • the construction of the device may be simplified as the pogo pins can provide an electrical connection through to the heater through the outer wall of the device from a power source provided external to the vacuum chamber. Furthermore, the risk of damaging the heater during assembly of the device is reduced due to the fact that pogo pins may be gently biased towards the heater.
  • the coating may comprise silicon. It has been found that silicon coatings, in particular, are effective in reducing outgassing.
  • a method for forming an aerosol generating device comprising: forming a vacuum chamber defined between a plurality of walls, the plurality of walls each having internal surfaces; providing a heater on at least one of the walls of the vacuum chamber, wherein the heater is disposed within the vacuum chamber; forming one or more electrical connections, wherein the heater is electrically connected to a power source provided external to the vacuum chamber through at least one of the walls of the vacuum chamber using the one or more electrical connections; and coating the one or more electrical connections, thereby to prevent outgassing into the vacuum chamber.
  • the method further comprises coating the heater and/or any of the internal surfaces, thereby to prevent outgassing into the vacuum chamber.
  • the coating is applied via chemical vapour deposition.
  • coating the heater, the one or more electrical connections, and/or any of the internal surfaces comprises coating the heater, the one or more electrical connections, and/or any of the internal surfaces via chemical vapour deposition.
  • the coating can be applied accurately to components of the aerosol generating device that are to be disposed within the vacuum chamber.
  • chemical vapour deposition a thin film of the coating can be applied to the heater, the one or more electrical connections, and/or any of the internal surfaces.
  • a silicon coating may be applied via chemical vapour deposition to the heater, the one or more electrical connections, and/or any of the internal surfaces.
  • the surfaces of the other components may be masked with a material to prevent the coating from being applied to the masked surfaces.
  • the inner wall When coating the inner wall of the vacuum chamber, the inner wall may be inverted and placed on or into a jig.
  • the jig may be an array of holes onto or into which components of the device may be placed. This prevents the coating from being applied to an opening, or heating chamber of the cup-shaped inner wall as the heating chamber is not exposed.
  • Figure 1 is a schematic cross-sectional diagram of an aerosol generating device comprising a vacuum chamber known in the art
  • Figure 2 is a schematic cross-sectional diagram of an aerosol generating device in an embodiment of the invention.
  • Figure 3 is a schematic cross-sectional diagram of an aerosol generating device in another embodiment of the invention.
  • Figure 4 is a schematic cross-sectional diagram of an aerosol generating device in another embodiment of the invention.
  • FIG. 1 is a schematic cross-sectional diagram of an aerosol generating device 100 comprising a vacuum chamber 102 known in the art.
  • the aerosol generating device 100 has a generally cylindrical shape with a circular cross-section, defined around a central axis.
  • the vacuum chamber 102 is defined between an inner wall 104a, an outer wall 104b, and upper wall 104c and a lower wall 104d.
  • the walls each have internal surfaces that face inwardly towards the vacuum chamber 102.
  • An opening 105 is provided through the upper wall 104c.
  • the opening 105 extends in an axial direction internally within the cup-shaped inner wall 104a.
  • the opening 105 is configured such that an aerosol generating substrate (not shown) can be received within the inner wall 104a for heating by a heater 106.
  • the heater 106 comprises lead pads 107 and is provided on the inner wall 104a.
  • the heater 106 is disposed within the vacuum chamber 102.
  • a first electrical connection 108a and a second electrical connection 108b are provided through the lower wall 104d to connect the heater 106, via the lead pads 107, to a power source (not shown) that is provided external to the vacuum chamber 102.
  • the heater 106 is printed to the inner wall 104a.
  • the heater 106 may contain organic compounds that can decompose when heated. These compounds may release small quantities of gas into the vacuum chamber 102 during decomposition, thus damaging the vacuum state of the vacuum chamber, in a process that is known as outgassing.
  • the first and second electrical connections 108a, b are connected to the heater using a solder. A flux is often used to apply a heated solder to a specific area to form a connection. Fluxes commonly comprise organic compounds such as naturally occurring resins. These naturally occurring resins are also likely to decompose when heated, releasing small quantities of gas into the vacuum chamber 102. These effects can be detrimental to the vacuum state of the vacuum chamber 102.
  • FIG. 2 is a schematic cross-sectional diagram of an aerosol generating device 200 in an embodiment of the invention.
  • the vacuum chamber 202 is defined between an inner wall 204a, an outer wall 204b, and upper wall 204c and a lower wall 204d.
  • the walls each have internal surfaces that face inwardly towards the vacuum chamber 202.
  • An opening 205 is provided through the upper wall 204c.
  • the opening 205 also extends axially within the cup-shaped inner wall 204a.
  • the opening 205 is configured such that an aerosol generating substrate (not shown) can be received within the inner wall 204a for heating by a heater 206.
  • the heater 206 comprises lead pads 207 and is provided on the inner wall 204a.
  • the heater 206 is disposed within the vacuum chamber 202.
  • a first electrical connection 208a and a second electrical connection 208b are provided through the lower wall 204d to connect the heater 206, via the lead pads 207, to a power source (not shown) that is provided external to the vacuum chamber 202.
  • a coating 210 is provided on the heater 206 and the lead pads of the heater 207 to reduce outgassing from compounds within the heater 206 into the vacuum chamber 202.
  • a silicon coating may be provided. The material used for the coating is selected so that it is non-porous and does not contain organic material that could potentially cause outgassing.
  • the outer wall 204b, the upper wall 204c and the lower wall 204d are separate components. In other examples, these three components may instead be a single unitary cup-shaped outer wall.
  • the heater 206 is provided on an outward-facing surface of the inner wall 204a and within the vacuum chamber 202.
  • the outward-facing surface of the inner wall 204 and the inner-facing surface of the outer wall 204b are spaced apart from each other within the vacuum chamber 202.
  • the vacuum chamber 202 therefore insulates the outer wall 204b, and thus a user of the device, from heat produced by the heater 206. Heat from the heater 206 is transferred to the inner wall 204a and by conduction to a consumable that is received within the opening 205.
  • the vacuum chamber 202 is sealed by the top wall 204c and bottom wall 204d.
  • the heater 206 is a printed heating element comprising printed lead pads 207 to which the first and second electrical connections 208a, b can be connected to.
  • the heater 206 is printed to the exterior of the inner wall 204a that is to be within the vacuum chamber 202 with an electrically conducting screen print ink which forms the heater.
  • the heater 206 may be a wire heating element or another type of heater.
  • the heater 206 is printed in a meandering pattern to provide uniform heating to the inner wall 204a.
  • the first and second electrical connections 208a, b are provided through the lower wall 204d. In other examples, the first and second electrical connections 208a, b may be provided through the outer wall 204b or the upper wall 204c or through a combination of walls.
  • a coating 210 is provided on the heater 206 and on the lead pads of the heater 207 to reduce outgassing into the vacuum chamber.
  • the coating 210 is silicon coating that that is applied to the heater 206 and to the lead pads 207 using chemical vapour deposition.
  • the inner wall 204a, the outer wall 204b, the upper wall 204c, the lower wall 204d and the first and second electrical connections 208a, b may be masked with a material to prevent the coating from being applied to these surfaces. The material can then be removed after the coating has been applied, leaving only the heater 206 and the lead pads 207 coated.
  • the thickness of the coating is selected to provide a particular length of use, during which the coating can continue to prevent outgassing into the vacuum chamber.
  • the particular length of use is at least two years.
  • Figure 3 is a schematic cross-sectional diagram of an aerosol generating device 300 in an embodiment of the invention, which is similar in structure to the embodiment of Figure 2.
  • a first coating 310 is provided on the heater 306 and the lead pads 307 to prevent outgassing from compounds within the heater into the vacuum chamber 302 and a second coating 320 is provided on the first and second electrical connections 308a, b to prevent outgassing from compounds within the first and second electrical connections 308a, b into the vacuum chamber 302.
  • the first and second coatings 310, 320 are silicon coatings that that are applied to the heater 306, the lead pads 307, and to the first and second electrical connections 308a, b using chemical vapour deposition.
  • the first and second coatings 310, 320 are silicon coatings that that are applied using chemical vapour deposition.
  • the first and second coatings 310, 320 may be applied in a single step, and may effectively create a single coating that covers the heater 306, the lead pads 307 and the first and second electrical connections 308a, b.
  • the walls of the vacuum chamber may be masked with a material when applying the coating to prevent the coating from being applied to the surfaces of the walls.
  • Figure 4 is another schematic cross-sectional diagram.
  • a first coating 410 is provided on the heater 406 and the lead pads 407 to prevent outgassing from compounds within the heater into the vacuum chamber 402.
  • a second coating 420 is provided on the first and second electrical connections 408a, b to prevent outgassing from compounds within the first and second electrical connections 408a, b into the vacuum chamber 402.
  • a third coating 430 is provided on the internal surfaces of the outer wall 404b, a fourth coating 440 is provided on the internal surfaces of the lower wall 404d and a fifth coating is provided on the internal surfaces of the upper wall 404c.
  • the third, fourth and fifth coatings 430, 440, 450 prevent outgassing into the vacuum chamber 402 from the outer wall 404b, the lower wall 404d and the upper wall 404c respectively.
  • the third, fourth and fifth coatings 430, 440, 450 are also silicon coatings that that are applied using chemical vapour deposition.
  • the first, second, third, fourth and fifth coatings 410, 420, 430, 440, 450 may be applied together in a single step so that they form a single coating. Alternatively, one or more of these coatings may be combined with one another, and may be formed from different coating materials, depending on manufacturing preferences.
  • the inner wall 404a may be masked with a material to prevent the coating from being applied to the surfaces of the inner wall 204a not covered by the heater 406.
  • a coating may also be provided on the inner wall 404a so that the surfaces that define the vacuum chamber 402 are fully coated together with all of the components that are provided within the vacuum chamber 402.

Landscapes

  • Resistance Heating (AREA)
  • Chemical Vapour Deposition (AREA)

Abstract

Est divulgué dans la présente invention un dispositif de génération d'aérosol, comprenant : une chambre à vide (402) définie entre une pluralité de parois (404a, b, c, d), la pluralité de parois comportant chacune des surfaces internes ; un dispositif de chauffage (406) disposé sur au moins une paroi des parois de la chambre à vide, le dispositif de chauffage étant disposé à l'intérieur de la chambre à vide ; une ou plusieurs connexions électriques (408a, b), le dispositif de chauffage étant électriquement connecté à une source d'alimentation disposée à l'extérieur de la chambre à vide à travers au moins une paroi des parois de la chambre à vide à l'aide de la ou des connexions électriques ; et un revêtement, le revêtement (410, 420, 430, 440, 450) étant disposé sur un ou plusieurs éléments parmi le dispositif de chauffage (410), la ou les connexions électriques (420), et l'une des surfaces internes (430, 440, 450), ce qui permet d'empêcher le dégazage dans la chambre à vide.
PCT/EP2024/067769 2023-06-30 2024-06-25 Dispositif de génération d'aérosol comprenant une chambre à vide Ceased WO2025003112A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP24736435.9A EP4734780A1 (fr) 2023-06-30 2024-06-25 Dispositif de génération d'aérosol comprenant une chambre à vide
KR1020257040838A KR20260003345A (ko) 2023-06-30 2024-06-25 진공 챔버를 포함하는 에어로졸 생성 디바이스
CN202480041110.4A CN121368439A (zh) 2023-06-30 2024-06-25 包括真空腔室的气溶胶产生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23182841 2023-06-30
EP23182841.9 2023-06-30

Publications (1)

Publication Number Publication Date
WO2025003112A1 true WO2025003112A1 (fr) 2025-01-02

Family

ID=87060249

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/067769 Ceased WO2025003112A1 (fr) 2023-06-30 2024-06-25 Dispositif de génération d'aérosol comprenant une chambre à vide

Country Status (5)

Country Link
EP (1) EP4734780A1 (fr)
KR (1) KR20260003345A (fr)
CN (1) CN121368439A (fr)
TW (1) TW202502218A (fr)
WO (1) WO2025003112A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021208883A1 (fr) * 2020-04-13 2021-10-21 深圳市合元科技有限公司 Dispositif de chauffage et ensemble à fumer comprenant le dispositif de chauffage
US20220354184A1 (en) * 2020-06-03 2022-11-10 Kt&G Corporation Heater module, method of manufacturing the heater module, and aerosol-generating device with the heater module
US20220408821A1 (en) * 2019-12-17 2022-12-29 Kt&G Corporation Aerosol-generating device and aerosol-generating system including the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220408821A1 (en) * 2019-12-17 2022-12-29 Kt&G Corporation Aerosol-generating device and aerosol-generating system including the same
WO2021208883A1 (fr) * 2020-04-13 2021-10-21 深圳市合元科技有限公司 Dispositif de chauffage et ensemble à fumer comprenant le dispositif de chauffage
US20220354184A1 (en) * 2020-06-03 2022-11-10 Kt&G Corporation Heater module, method of manufacturing the heater module, and aerosol-generating device with the heater module

Also Published As

Publication number Publication date
KR20260003345A (ko) 2026-01-06
CN121368439A (zh) 2026-01-20
EP4734780A1 (fr) 2026-05-06
TW202502218A (zh) 2025-01-16

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