EP4349131A1 - Dispositif de vaporisation pour inhalateur - Google Patents

Dispositif de vaporisation pour inhalateur

Info

Publication number
EP4349131A1
EP4349131A1 EP22732932.3A EP22732932A EP4349131A1 EP 4349131 A1 EP4349131 A1 EP 4349131A1 EP 22732932 A EP22732932 A EP 22732932A EP 4349131 A1 EP4349131 A1 EP 4349131A1
Authority
EP
European Patent Office
Prior art keywords
temperature
resistance
evaporation
heating element
range around
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
EP22732932.3A
Other languages
German (de)
English (en)
Inventor
Eiko Bäumker
Thomas Bilger
Muhannad Ghanam
Timo GERACH
Uwe Pelz
Mohamad Reza SABERI
Peter Woias
Luca CONRAD
Frank GOLDSCHMIDTBÖING
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.)
Koerber Technologies GmbH
Original Assignee
Koerber Technologies GmbH
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 Koerber Technologies GmbH filed Critical Koerber Technologies GmbH
Publication of EP4349131A1 publication Critical patent/EP4349131A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • 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
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/148—Silicon, e.g. silicon carbide, magnesium silicide, heating transistors or diodes
    • 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
    • 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
    • A24F40/50—Control or monitoring
    • A24F40/57—Temperature control
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids

Definitions

  • the present invention relates to a vaporization device for an inhaler, comprising an electrical resistance heating element for vaporizing liquid brought into contact with the resistance heating element by means of electrical energy.
  • Such an inhaler is known, for example, from DE 10 2017 123 868 B4, DE 10 2017 123 869 B4 and DE 10 2017 123 870 B4.
  • the invention is based on the object of providing a device and a method for an inhaler which, despite the resistance of the heating element subject to tolerances, enables the heating element temperature to be determined with a tolerance which is significantly lower than the tolerance at the beginning
  • the resistance heater consists of a material in which, in a temperature range around an evaporation temperature, the change in resistance per
  • a temperature range around an evaporation temperature is a temperature range that includes at least one average evaporation temperature (for example 250°C) and the lower limit of which is above 100°C.
  • a temperature range around room temperature is a temperature range that includes room temperature (25 °C) and has an upper limit below 100 °C.
  • T 0 25 °C (room temperature)
  • a temperature sensor for measuring the heating element temperature is advantageously not provided, since the sensor and the electrical contacts for evaluating the sensor would make the vaporization device much more expensive.
  • the only thing available for measuring the temperature is the electrical resistance of the
  • the increase in temperature is calculated from the relative increase in resistance compared to the initial resistance or from the absolute resistance of the radiator.
  • the amount of steam generated also depends on the ambient temperature. At low temperatures (e.g. -20°C) more energy is required to heat the liquid up to the evaporation point, and the heat losses to the environment are also higher. Overall it turns out at the same
  • a heating element is now used that is within the tolerance range of the initial temperature (here, for example, -20°C to
  • the change in resistance per temperature interval is at least three times as large, preferably
  • the initial resistance Ro of the heater is essentially temperature-independent, or at least considerably less temperature-dependent, so that the tolerance of the initial tem
  • Such a material is boron-doped silicon, for example with a dopant concentration in the range of 4-10 18 /cm 3 . In this range, boron-doped silicon shows an almost constant specific resistance in the range from -20°C to +50°C, for example, and in
  • measuring range here, for example, greater than 200° C.
  • a linear temperature dependency of the material in the range of the evaporation or operating temperature simplifies the determination of the temperature and is therefore preferred.
  • the doping is preferably at least 10 16 /cm 3 , preferably at least 10 17 7cm 3 , more preferably at least
  • a sufficient and suitable doping level is important for achieving the desired temperature dependence of the specific resistance of the heater.
  • the doping generally depends on the semiconductor material and on the doping material 10 (foreign atoms).
  • the relative change in resistance of the heating element material per temperature interval is preferably at least 10% per 100 K. 15 In a temperature range around room temperature, the relative change in resistance of the heating element material per temperature interval is preferably at most 3.5% per 100 K.
  • Fig. 1 is a schematic view of an electronic inhala gate
  • Fig. 2 is a perspective view of a vaporization device for an inhaler
  • FIG. 3 shows a temperature characteristic of a heating element made of a material according to the invention
  • the electronic inhaler 10 here an electronic cigarette product, comprises a housing 11 in which an air duct 30 is provided between at least one air inlet opening 31 and an air outlet opening 15 at a mouth end 32 of the cigarette product 10.
  • the mouth end 32 of the cigarette product 10 denotes the end at which the consumer pulls for the purpose of inhalation and thereby applies a negative pressure to the cigarette product 10 and generates an air flow 34 in the air duct 30 .
  • the inhaler 10 comprises a vaporization device 20 and a liquid reservoir 18, which can be part of an exchangeable vaporizer cartridge 17, for example.
  • the air sucked in through the inlet opening 31 is guided in the air duct 30 as an air flow 25 to, through, or along the evaporation device 20 .
  • the evaporation device 20 is connected or connectable to the liquid storage device 18 in which at least one liquid 33 is stored.
  • the vaporization device 20 vaporizes liquid 33 which is supplied to it from the liquid reservoir 18 30 and releases the vaporized liquid as an aerosol/
  • the liquid 33 to be metered that is stored in the liquid reservoir 18 is, for example, a mixture comprising one or more of the following components in any combination: 1,2-propylene glycol, glycerol, water, at least
  • the liquid can contain at least one active substance, for example nicotine.
  • the electronic cigarette 10 also includes an electrical energy store 14 and an electronic control system
  • the energy store 14 can in particular be an electrochemical disposable battery or a rechargeable electrochemical battery, for example a lithium-ion battery. In the example shown in Figure 1, the energy storage
  • the electronic control device 15 is advantageously digital and preferably includes a microprocessor and/or microcontroller
  • the control device 15 controls the evaporation device 20 in order to supply liquid 33 from the liquid storage device 18 as an aerosol/vapor into the air flow 34
  • the evaporation device 20 comprises at least one evaporator in the form of a resistance heater 23 (see FIG. 2) and advantageously a capillary element 12 for supplying liquid 33 from the liquid reservoir 18 to the heater 23.
  • a resistance heater 23 see FIG. 2
  • a capillary element 12 for supplying liquid 33 from the liquid reservoir 18 to the heater 23.
  • the heating element 23 is electrically connected to a heating voltage source 22, which can be controlled by the electronic control device 15, via electrical lines 25.
  • the heating voltage source 22 is preferably via the electric 29 on opposite sides of the radiator 23 with the
  • the heating voltage source 22 draws electrical energy from the electrical energy store 14. Due to the ohmic resistance of the electrically conductive heating element 23
  • the current flow leads to a heating of the heating element 23 and therefore to an evaporation of liquid contained in the microchannels 27.
  • the heating element 23 thus acts as an evaporator. Vapor/aerosol generated in this way escapes from the microchannels 27 on the outlet side 26 and is mixed with the air flow 34,
  • control device 15 activates the heating voltage source 22, whereby the liquid in the micro-channels 27 in the form of vapour/aerosol is released from the micro-channels by spontaneous heating
  • the inhaler 10 advantageously comprises a digital data memory 35 for storing information or parameters relating to the evaporator cartridge 17 .
  • the data memory 35 can be part of the elec
  • the data memory 35 is advantageously information on the WO 2022/253734 gschinenbau GmbH H PCT/EP2022/064548 sa composition of the liquid stored in the liquid reservoir 18, information on the process profile, in particular power/temperature control; Data for status monitoring or system testing, for example leak testing; data regarding
  • an ID for unique identification of the evaporator cartridge 17 serial number, manufacturing date and/or expiration date, and/or number of puffs (number of inhalations puffs by the consumer) or the usage time ge stores.
  • the heating element 23 is provided with a plurality of micro-channels 27 which connect an inlet side 28 of the heating element 23 to an outlet side 26 in a fluid-conducting manner.
  • the inlet side 28 is liquid-conducting via a capillary element 12 with the liquid
  • the capillary element 12 is used for passive ven promotion of liquid 33 to be evaporated from a liquid reservoir 18 to the radiator 23 by means of capillary forces.
  • the capillary element 12 is advantageously made of a non-conductive material to prevent unwanted heating of liquid
  • the average diameter of the microchannels 27 is preferably in the range between 5 ⁇ m and 200 ⁇ m, more preferably in the range between 30 ⁇ m and 118 ⁇ m, even more preferably in the range
  • the 30 body 23, which can be referred to as the porosity of the heating element 23, is for example in the range between 10% and 18%, pre- WO 2022/253734 gschinenbau GmbH H PCT/EP2022/064548 partially in the range between 15% and 40%, even more advantageously in the range between 20% and 30%, and is for example 25%.
  • the thickness of the heater 23 and thus the length of the microchannels 27 is preferably in the range between 0.05 mm and 1 mm, white
  • 5 ter preferably in the range between 0.1 mm and 0.75 mm, even more preferably in the range between 0.2 mm and 0.5 mm and is, for example, 0.3 mm.
  • the heating element 23 is preferably block-shaped, for example
  • the heating element 23 advantageously has no macroscopic cavities apart from the microchannels 27.
  • the heater 23 can therefore be referred to as a block, bulk or volume heater.
  • the evaporation temperature is preferably in the range between 100°C and 400°C, more preferably between 150°C and 318°C, even more preferably between 190°C and 240°C.
  • the vaporization device 20 has an electronic measurement
  • circuit 19 for determining the temperature of the heater 23 by measuring the electrical resistance of the heater 23 on. Circuits for measuring the electrical resistance of a current-carrying heater are known per se.
  • a material is used for the heating element 23 that shows a comparatively small change in resistance with the temperature in the tolerance range of the initial temperature, here for example -20 °C to +50 °C, and in the range of the evaporation temperature, here for example 200 °C to 300 °C, a comparatively high resistance
  • FIG. 3 shows an example of such a temperature characteristic of a heater 23 according to the invention
  • the solid line 41 at low temperatures reflects a measurement in a climatic chamber.
  • the solid line 42 at higher temperatures is a Mes solution with an infrared camera with resistance heating of the heater body 23 again. In the range of the initial temperature between
  • the resistance of the heating element 23 only changes by about 20 m ⁇ (1.01 ⁇ 0.01 W). In the range of the evaporation temperature, here between 150° C. and 250° C., the resistance of the heating element 23 changes significantly by about 210 m ⁇ (1.14-1.35 W).
  • the initial resistance R 0 of the heater 23 is substantially tempera
  • a corresponding resistance characteristic can be achieved by using a material with a suitable temperature dependence of the specific resistance for the heating element 23 .
  • the heating element 23 advantageously consists of an electrically conductive, doped semiconductor material, preferably doped silicon. in egg
  • the material of the heating element is boron-doped silicon.
  • the boron doping level is WO 2022/253734 gschinenbau GmbH H PCT/EP2022/064548 for example in the range between 10 18 /cm 3 and 10 19 /cm 3 and is for example 4-10 18 /cm 3 .
  • FIG. 4 shows the theoretical temperature dependencies of the specific resistance of boron-doped silicon 43 in comparison to phosphorus-doped silicon 44. Applied here is the specific resistance p in W-cm over the temperature of the radiator pers 23 in °C.
  • the boron-doped silicon points 43) shows an almost constant specific resistance in the range from -20 °C to +50 °C and in the measuring range (here greater than 200 °C) a largely linear temperature dependency.
  • Phosphorus-doped silicon (item 44), on the other hand, is not suitable because the specific resistance varies greatly in the range from -20 °C to +50 °C.
  • FIG. 5 shows a measured curve of the resistance of a heating element 23 made of boron-doped silicon (solid line) together with the value calculated from the theoretical course (points) of the specific resistance. Both curves are close together and follow a very similar course.
  • the table in FIG. 6 shows the temperature T max for nine values of the initial temperature To in the range -20° C. to +50° C. when 1.28 times the initial resistance is reached and the initial resistance Ro in ohms. From the table it can be seen that for the curve shown in FIG. 3 there is a tolerance of only approx. 9 K for the temperature determination with the tolerance of the initial temperature of 70 K.

Landscapes

  • Resistance Heating (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

L'invention concerne un dispositif de vaporisation (20) pour un inhalateur, comprenant un corps de chauffage par résistance électrique (23) pour vaporiser un liquide (33), qui a été mis en contact avec le corps de chauffage par résistance (23), au moyen d'énergie électrique. Le corps de chauffage par résistance (23) consiste en un matériau, dans lequel, dans une plage de température autour d'une température de vaporisation, le changement de résistance par intervalle de température est au moins trois fois plus grand que dans une plage de température autour de la température ambiante.
EP22732932.3A 2021-06-02 2022-05-30 Dispositif de vaporisation pour inhalateur Pending EP4349131A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021114281.4A DE102021114281A1 (de) 2021-06-02 2021-06-02 Verdampfungsvorrichtung für einen Inhalator
PCT/EP2022/064548 WO2022253734A1 (fr) 2021-06-02 2022-05-30 Dispositif de vaporisation pour inhalateur

Publications (1)

Publication Number Publication Date
EP4349131A1 true EP4349131A1 (fr) 2024-04-10

Family

ID=82163483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22732932.3A Pending EP4349131A1 (fr) 2021-06-02 2022-05-30 Dispositif de vaporisation pour inhalateur

Country Status (4)

Country Link
US (1) US20240251481A1 (fr)
EP (1) EP4349131A1 (fr)
DE (1) DE102021114281A1 (fr)
WO (1) WO2022253734A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505214A (en) * 1991-03-11 1996-04-09 Philip Morris Incorporated Electrical smoking article and method for making same
DE102017119521A1 (de) * 2017-08-25 2019-02-28 Hauni Maschinenbau Gmbh Verdampfereinheit für einen Inhalator und Verfahren zum Steuern einer Verdampfereinheit
DE102017123868B4 (de) 2017-10-13 2019-05-09 Hauni Maschinenbau Gmbh Verdampfereinheit für einen Inhalator, insbesondere für ein elektronisches Zigarettenprodukt
DE102017123870B4 (de) 2017-10-13 2019-05-09 Hauni Maschinenbau Gmbh Verdampfereinheit für einen Inhalator, insbesondere für ein elektronisches Zigarettenprodukt
DE102017123869B4 (de) 2017-10-13 2019-05-23 Hauni Maschinenbau Gmbh Flüssigkeitsspeicher für einen Inhalator, insbesondere für ein elektronisches Zigarettenprodukt
DE102018105220A1 (de) * 2018-03-07 2019-09-12 Hauni Maschinenbau Gmbh Verfahren zur Fertigung eines elektrisch betreibbaren Heizkörpers für einen Inhalator
US11413409B2 (en) * 2018-09-12 2022-08-16 Juul Labs, Inc. Vaporizer including positive temperature coefficient of resistivity (PTCR) heating element
KR20210073595A (ko) * 2018-11-08 2021-06-18 쥴 랩스, 인크. 하나 초과의 가열 요소를 갖는 증발기 장치
DE102019113645B4 (de) 2019-05-22 2020-12-03 Hauni Maschinenbau Gmbh Verfahren zur Regelung der Verdampfung eines Verdampfers in einem Inhalator

Also Published As

Publication number Publication date
WO2022253734A1 (fr) 2022-12-08
DE102021114281A1 (de) 2022-12-08
US20240251481A1 (en) 2024-07-25

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