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WO2024245778A1 - Dispositif de chauffage pour un dispositif de génération d'aérosol - Google Patents

Dispositif de chauffage pour un dispositif de génération d'aérosol Download PDF

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Publication number
WO2024245778A1
WO2024245778A1 PCT/EP2024/063638 EP2024063638W WO2024245778A1 WO 2024245778 A1 WO2024245778 A1 WO 2024245778A1 EP 2024063638 W EP2024063638 W EP 2024063638W WO 2024245778 A1 WO2024245778 A1 WO 2024245778A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
flow channel
exchanger structure
heating device
section
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.)
Pending
Application number
PCT/EP2024/063638
Other languages
German (de)
English (en)
Inventor
Pascal Schläpfer
Stefan Wolf
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.)
Innovative Sensor Technology IST AG
Original Assignee
Innovative Sensor Technology IST AG
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 Innovative Sensor Technology IST AG filed Critical Innovative Sensor Technology IST AG
Publication of WO2024245778A1 publication Critical patent/WO2024245778A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • A24F40/48—Fluid transfer means, e.g. pumps
    • A24F40/485—Valves; Apertures
    • 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

Definitions

  • the invention relates to a heating device for an aerosol generating device. Furthermore, the invention relates to an aerosol generating device which comprises the heating device according to the invention.
  • aerosol generating devices A large number of hand-held vapor-generating devices for consumption, hereinafter referred to as aerosol generating devices, are known from the prior art. What all of these aerosol generating devices have in common is that they are designed to hold a consumer product or "consumables" that contain a solid or liquid medium that is heated by the aerosol generating device so that it assumes a gaseous state or an aerosol form. This vapor is then inhaled by a consumer or user.
  • HTU "Heated Tobacco Unit”
  • HTU "Heated Tobacco Unit
  • the HTU can be heated in various ways. Common methods include inserting an electrically heated element into the HTU, inductively heating a susceptor located in the HTU, or heating a sleeve located on the outside of the HTU. Important parameters for all of the heating processes mentioned are the temperature homogeneity and accuracy in the entire HTU range, as well as the response time and dynamics of the temperature behavior.
  • the temperature inside the HTU should enable the extraction of the desired substances, but the target temperature should not be exceeded in any area to such an extent that harmful combustion products are formed. Due to the generally low thermal conductivity of the HTU, temperature control and regulation are of central importance. Since such HnB devices are generally designed to be portable, it is also desirable to minimize the power consumption of an ideal heating system as much as possible.
  • the invention is based on the object of presenting a heating device which makes it possible to heat a material in an aerosol generating device evenly and dynamically and at the same time to generate a proven draft feeling for a user.
  • the heating device it is provided that it is intended for an aerosol generating device and comprises at least one heating element and a sleeve, wherein the sleeve has a first section and a second section, wherein the sleeve has a heat exchanger structure in the first section, wherein the sleeve has a chamber in the second section for receiving a solid or liquid material, in particular a tobacco stick, wherein at least one flow channel is introduced into the heat exchanger structure, wherein the first section is arranged in front of the second section in the flow direction, so that when a user draws a fluid first flows through the flow channel of the heat exchanger structure and then through the chamber, wherein the at least one heating element is arranged with respect to the first portion of the sleeve such that the at least one heating element heats the fluid flowing in the flow direction through the flow channel of the heat exchanger structure to release ingredients from the material as it flows through the chamber, and wherein the heat exchanger structure is designed such that a predetermined flow resistance of the
  • the heating device therefore achieves the object by providing the heat exchanger structure, which is arranged in front of the chamber containing the material to be converted into the vapor phase.
  • the heat exchanger structure transfers the heat generated by the heating element or elements to the fluid flowing through it, in particular air, which then hits the material.
  • the material is therefore not in direct contact with the heating element or elements.
  • the heat exchanger structure has a special internal design due to the dimensioning of the flow channel, so that this flow channel forms a predetermined flow resistance for the fluid.
  • the flow resistance ensures a noticeable resistance when the user draws, which can be dimensioned so that the user can compare his experience with classic smoking or vaporizer products.
  • the material is a liquid material (so-called “liquid”) or solid material (e.g. tobacco) in which the corresponding ingredients can be converted into the vapor phase by heating.
  • the ingredients that can be released from the material are, for example, flavors and/or active ingredients such as nicotine or medicinal substances such as aspirin.
  • the heating element attached to the heat exchanger structure itself can be designed in a variety of ways.
  • a heating element based on the principle of resistance heating or an inductively heatable heating element made of a susceptor material can be used.
  • the use of other types of heating elements is also conceivable.
  • Further developments of the heating device make it possible to increase the efficiency of heat transfer between the sleeve and the air flow by intensifying the mixing of the air flow and the interaction with the heat exchanger surface.
  • the interior of the heat exchanger structure is specially designed for this purpose. Three variants are presented below:
  • the heat exchanger structure is designed in such a way that at least one passive fluidic valve is arranged in the flow channel, wherein the passive fluidic valve is arranged in the flow channel in such a way that the fluid flows through the passive fluidic valve in a blocking direction of the passive fluidic valve.
  • Passive fluidic valves are valves that do not contain any moving mechanical parts. Such a valve has a preferred direction and a blocking direction. In the blocking direction, the flow resistance of the fluid flowing through the valve is significantly higher than in the preferred direction. They are therefore also referred to as fluidic diodes.
  • Such valves are usually used to guide fluids in (micro)fluidic systems and to specify a flow direction. In the case of the invention, however, the flow resistance is used to create the pulling sensation preferred by the user. Furthermore, such valves generate turbulence in the mostly laminar flow profile in order to achieve a homogeneous heat distribution in the fluid.
  • the passive fluidic valve consists of Tesla elements, nozzles, diffusers or a combination thereof. All of these elements have a preferred direction and a blocking direction and generate turbulence when flowing through in the blocking direction.
  • the predetermined flow resistance can be set by arranging several passive fluidic valves in a row and/or by dimensioning the respective passive fluidic valves. The exact dimensioning and its effect on the flow resistance depends on the type of valve.
  • the heat exchanger structure is designed in such a way that the flow channel has a spiral shape. In this case, it is advantageously provided that the spiral shape of the flow channel comprises one or more complete turns. The turns ensure turbulence in the flow profile and therefore improved homogeneity of the heat distribution in the flow profile.
  • the flow channel is guided along the outer wall of the sleeve.
  • the outer wall of the sleeve is typically in contact with the heating element or elements and is therefore heated.
  • the flow channel is advantageously designed in such a way that the surface of the flow channel facing the outer wall is as large as possible in relation to the inner surface. In such a case, the flow channel does not have a round cross-section.
  • the predetermined flow resistance can be set by adjusting the number of channels and/or the channel geometry, in particular the diameter and length, or the number of turns. The smaller the diameter, and thus the cross-section, of the flow channel, the higher the flow resistance. The flow resistance also increases with increasing length of the flow channel.
  • the heat exchanger structure is designed in such a way that the heat exchanger structure comprises at least one lamella or rib arranged in the flow channel.
  • a lamella or rib is a structure which is inserted into the flow channel and spans a surface orthogonal to the direction of flow, thereby locally narrowing the flow channel. This also generates the turbulence already described and achieves the effects caused by it.
  • An advantageous embodiment provides at least two lamellae or ribs arranged in the flow channel, wherein the lamellae or ribs are designed and arranged in the flow channel in such a way that the lamellae or ribs each form an opening between the lamella or rib and the wall through which the fluid flows, and that the arrangement of the openings between a lamella or rib and the lamella or rib following it is alternating.
  • the openings are designed in such a way that the area of an opening is advantageously smaller than the area spanned by the lamella or rib in the flow channel. Alternating here means that the positions of an opening in the channel (viewed in the orthogonal cross section of the flow channel) change and alternate with each rib or lamella.
  • the predetermined flow resistance can be adjusted by designing the size of the openings and the number of openings.
  • the flow resistance increases with an increasing number of openings (and thus an increasing number of ribs/lamellae) and a smaller size or area of the openings.
  • An advantageous embodiment provides that the lamella or rib is designed and mounted in the flow channel in such a way that the lamella or rib is inclined against the flow direction. This increases the number and strength of the turbulence.
  • An advantageous embodiment of the heating device provides that the at least one heating element is in thermal contact with the outer wall of the heat exchanger structure. As a result, the heat generated by the heating element or elements is transferred to the outer wall of the heat exchanger structure and from there into the fluid. It is advantageous here if at least the outer wall is made of a material that has a high thermal conductivity, for example a metallic or suitable ceramic material.
  • the aerosol generating device it is provided that it has a heating device according to the invention.
  • the aerosol generating device further comprises a housing into which the aerosol generating device is inserted.
  • the housing contains a recess for introducing the material to be converted into the vapor phase and, if necessary, an attachment on which the user can pull in order to inhale the material (if a tobacco stick is used, no attachment is required since the user inhales through the tobacco stick).
  • An electronic unit and a battery unit are also arranged in the housing, by means of which the heating element is controlled and supplied with electrical energy.
  • one or more control elements e.g. for switching the aerosol generating device on and off
  • Fig. 1 first embodiment of an aerosol generating device according to the invention
  • Fig. 2 a first embodiment of a heat exchanger structure used in the aerosol generating device
  • Fig. 3 a second embodiment of a heat exchanger structure used in the aerosol generating device
  • Fig. 4 is a cross-section of the heat exchanger structure of the second embodiment
  • Fig. 5 a third embodiment of a heat exchanger structure used in the aerosol generating device.
  • Fig. 6 a fourth embodiment of a heat exchanger structure used in the aerosol generating device.
  • an aerosol generating device 1 according to the invention is shown as an example.
  • the aerosol generating device has a housing 110, which has an outlet at one end region.
  • the outlet is part of a recess 120 and serves to receive aerosols generated by the aerosol generating device 1 by a user.
  • the recess 120 serves to supply a liquid or solid material, for example in stick form or as a liquid tank, to a cylindrical sleeve 102.
  • the material contains active ingredients, for example nicotine or aspirin.
  • the cylindrical sleeve 102 comprises a first section 103 and a second section 104.
  • the material is placed in the second section 104.
  • the first section 103 comprises a heat exchanger structure 105.
  • the aerosols are generated by two heating elements 101, 101' thermally connected to an outer wall 107 of the sleeve emitting heat, the heating elements 101, 101' being attached at different positions (e.g. top and bottom) of the outer wall 107.
  • This heat is supplied by the heat exchanger structure 105 to a fluid, in particular air, which flows through a flow channel 106, 106' of the heat exchanger structure 105 when the user inhales or draws air.
  • the heated fluid then flows through the material, dissolves ingredients and transports them to the outlet of the aerosol generating device 100.
  • the heating elements 101, 101' are in particular resistance heating elements or inductively heatable heating elements.
  • a heating element 101, 101' can be switched on and off by a control unit 130.
  • the control unit 130 and the heating elements 101, 101' are supplied with the electrical energy required for operation by a power supply unit 140, in particular a battery or an accumulator.
  • a power supply unit 140 in particular a battery or an accumulator.
  • two heating elements 101, 101' are used in this exemplary embodiment for reasons of efficiency (reduced response time), the use of a single heating element or more than two heating elements is also possible.
  • the heat exchanger structure 105 must have certain properties in order to be able to generate optimal heating of the flowing fluid and a draw resistance familiar to users of conventional cigarettes.
  • the dimensions underlying a typical aerosol generation device 1 and the properties of the fluid to be heated (air) mean that for physically relevant flow velocities the flow inside the heat exchanger structure 105 is mainly laminar. Therefore, mixing of the fluid is central to efficient heat transfer, so that the formation of warm boundary layers on the flow channel walls can be counteracted.
  • a first embodiment of the heat exchanger structure 105 is shown in Fig. 2.
  • the heat exchanger structure 105 is enclosed by the outer walls 107 of the first section 103 of the sleeve 102.
  • the heat exchanger structure 105 comprises a flow channel 106 through which the fluid flows in the flow direction v when the user pulls.
  • fins L1, L2, ..., Ln are introduced into the flow channel 106. These are designed and attached to the outer walls 107 in such a way that some of the fins L1, L2, ..., Ln are inclined against the flow direction v. This stimulates mixing of the fluid by generated turbulence (see the arrows indicating the mixing), so that the heat distribution in the fluid is optimized by the heat radiating from the outer walls.
  • the flow regime is expected to be laminar, further optimizations can be implemented.
  • a special arrangement of the fins L1, L2, ..., Ln is shown.
  • the fins are arranged in the flow channel 106 and connected to the outer wall 107 in such a way that the fluid must flow through narrow openings 01, 02, ..., On when the user pulls.
  • the cross section of the heat exchanger structure 105, or the sleeve 102 in the first section 103 is shown.
  • the fins L1, L2, ..., Ln are arranged in such a way that the position of the opening 01, 02, ..., On changes from one fin to the next fin.
  • the openings 01, 02, ..., On are arranged alternately, i.e. alternately repeating.
  • the deflection of the fluid flow is forced even in laminar flow.
  • the geometry shown has less "dead volume" compared to the embodiment shown in Fig. 2, which intensifies the interaction with the outer wall 107 heated by the heating element 101.
  • the flow channel 106 is designed in such a way that two Tesla valves V1, V2 are formed in it.
  • Two-dimensional Tesla valves V1, V2 are known from areas of microfluidics, where similar issues are often addressed.
  • Tesla valves are part of the class of microfluidic passive valves, i.e. structures that, due to their geometry, can be flowed through more easily in one direction (preferred direction) than in the other direction (blocking direction). In the case of the Tesla valve, this is done by partially redirecting the flow direction. The principle of redirecting and recombination of the volume flow ensures an even heat distribution in the fluid.
  • the fluid flows through the two valves V1, V2 in the blocking direction.
  • the exact level of this flow resistance, and the associated desired draft resistance that the user can perceive, can be set by selecting the dimensions, number of bypasses in the valves V1, V2 and number of valves V1, V2 themselves.
  • the known two-dimensional Tesla valves are adapted to a cylindrical component. This achieves maximum mixing in the laminar state, which also maximizes heat transfer.
  • FIG. 6 A final embodiment is shown in Fig. 6.
  • the fluid is transported in two spiral-shaped flow channels 106, 106' along the heated outer wall 107.
  • the pressure loss which the user perceives as a desired draft resistance, can be determined here by the dimensions of the individual flow channels.
  • the heat transfer is optimized by designing the channel geometry in such a way that the surface of a flow channel 106, 106' facing the outer wall 107 is as large as possible in relation to the inner surface. In the present example, the cross-section of the flow channels is therefore not round, but D-shaped.

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  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

L'invention concerne un dispositif de chauffage (100) pour un dispositif de génération d'aérosol (1), ledit dispositif de chauffage comprenant au moins un élément chauffant (101, 101') et un manchon (102), en particulier un manchon ayant une conception cylindrique, le manchon (102) ayant une première section (103) et une seconde section (104), le manchon ayant une structure d'échangeur de chaleur (105) dans la première section (103), et le manchon ayant une chambre destinée à recevoir un matériau solide ou liquide, en particulier un bâtonnet de tabac, dans la seconde section (102). Au moins un canal d'écoulement (106) est introduit dans la structure d'échangeur de chaleur (105). La première section (103) est disposée devant la seconde section (104) dans la direction d'écoulement ((I)) de telle sorte que, lorsqu'un utilisateur inhale, un fluide s'écoule d'abord dans le canal d'écoulement de la structure d'échangeur de chaleur (105) puis dans la chambre. Ledit élément chauffant (101, 101') est agencé par rapport à la première section (103) du manchon (102) de telle sorte que l'élément chauffant (101, 101') chauffe le fluide s'écoulant dans le canal d'écoulement de la structure d'échangeur de chaleur (105) dans la direction d'écoulement ((I)) afin de libérer les ingrédients du matériau lors de l'écoulement dans la chambre, et la structure d'échangeur de chaleur (105) est conçue de telle sorte qu'une résistance à l'écoulement spécifiée du fluide soit obtenue lorsque le fluide s'écoule dans le canal d'écoulement de la structure d'échangeur de chaleur (105).
PCT/EP2024/063638 2023-06-02 2024-05-17 Dispositif de chauffage pour un dispositif de génération d'aérosol Pending WO2024245778A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023114594.0A DE102023114594A1 (de) 2023-06-02 2023-06-02 Heizvorrichtung für eine Aerosolerzeugungsvorrichtung
DE102023114594.0 2023-06-02

Publications (1)

Publication Number Publication Date
WO2024245778A1 true WO2024245778A1 (fr) 2024-12-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/063638 Pending WO2024245778A1 (fr) 2023-06-02 2024-05-17 Dispositif de chauffage pour un dispositif de génération d'aérosol

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Country Link
DE (1) DE102023114594A1 (fr)
WO (1) WO2024245778A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190343182A1 (en) * 2017-01-13 2019-11-14 British American Tobacco (Investments) Limited Aerosol generating device and article
US20210212382A1 (en) * 2020-01-10 2021-07-15 Fuisz Hnb Technologies Llc Heater for vaporizer device with air preheating element and method for producing the same
CN113197352A (zh) * 2021-04-27 2021-08-03 深圳麦克韦尔科技有限公司 一种电子雾化装置
EP3858171A1 (fr) * 2020-01-30 2021-08-04 Nerudia Limited Appareil de distribution d'aérosol
EP3858174A1 (fr) * 2020-01-30 2021-08-04 Nerudia Limited Système d'administration d'aérosol
US20220022555A1 (en) * 2018-11-28 2022-01-27 Philip Morris Products S.A. Heater comprising a part manufactured by additive manufacturing
WO2022214463A1 (fr) * 2021-04-06 2022-10-13 Jt International Sa Compartiment de stockage pour un dispositif de génération d'aérosol

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204362975U (zh) * 2015-01-20 2015-06-03 川渝中烟工业有限责任公司 一种电加热不燃烧烟草的抽吸装置
CN115606853A (zh) * 2022-11-02 2023-01-17 惠州市沛格斯科技有限公司 空气加热组件、加热模组以及电子烟具装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190343182A1 (en) * 2017-01-13 2019-11-14 British American Tobacco (Investments) Limited Aerosol generating device and article
US20220022555A1 (en) * 2018-11-28 2022-01-27 Philip Morris Products S.A. Heater comprising a part manufactured by additive manufacturing
US20210212382A1 (en) * 2020-01-10 2021-07-15 Fuisz Hnb Technologies Llc Heater for vaporizer device with air preheating element and method for producing the same
EP3858171A1 (fr) * 2020-01-30 2021-08-04 Nerudia Limited Appareil de distribution d'aérosol
EP3858174A1 (fr) * 2020-01-30 2021-08-04 Nerudia Limited Système d'administration d'aérosol
WO2022214463A1 (fr) * 2021-04-06 2022-10-13 Jt International Sa Compartiment de stockage pour un dispositif de génération d'aérosol
CN113197352A (zh) * 2021-04-27 2021-08-03 深圳麦克韦尔科技有限公司 一种电子雾化装置

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Publication number Publication date
DE102023114594A1 (de) 2024-12-05

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