EP4275525A1 - Cartouche de dispositif de génération d'aérosol comprenant une chambre d'expansion, et ensemble de génération d'aérosol associé - Google Patents
Cartouche de dispositif de génération d'aérosol comprenant une chambre d'expansion, et ensemble de génération d'aérosol associé Download PDFInfo
- Publication number
- EP4275525A1 EP4275525A1 EP22172705.0A EP22172705A EP4275525A1 EP 4275525 A1 EP4275525 A1 EP 4275525A1 EP 22172705 A EP22172705 A EP 22172705A EP 4275525 A1 EP4275525 A1 EP 4275525A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cartridge
- expansion chamber
- storage portion
- internal volume
- 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.)
- Pending
Links
- 239000000443 aerosol Substances 0.000 title claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 24
- 230000008016 vaporization Effects 0.000 description 14
- 239000007789 gas Substances 0.000 description 11
- 239000002243 precursor Substances 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 229920002725 thermoplastic elastomer Polymers 0.000 description 5
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 229920006236 copolyester elastomer Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- RYYVLZVUVIJVGH-UHFFFAOYSA-N caffeine Chemical compound CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 229920006147 copolyamide elastomer Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- CBOQJANXLMLOSS-UHFFFAOYSA-N ethyl vanillin Chemical compound CCOC1=CC(C=O)=CC=C1O CBOQJANXLMLOSS-UHFFFAOYSA-N 0.000 description 2
- MLFHJEHSLIIPHL-UHFFFAOYSA-N isoamyl acetate Chemical compound CC(C)CCOC(C)=O MLFHJEHSLIIPHL-UHFFFAOYSA-N 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 230000000391 smoking effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- NOOLISFMXDJSKH-UTLUCORTSA-N (+)-Neomenthol Chemical compound CC(C)[C@@H]1CC[C@@H](C)C[C@@H]1O NOOLISFMXDJSKH-UTLUCORTSA-N 0.000 description 1
- SNICXCGAKADSCV-JTQLQIEISA-N (-)-Nicotine Chemical compound CN1CCC[C@H]1C1=CC=CN=C1 SNICXCGAKADSCV-JTQLQIEISA-N 0.000 description 1
- -1 Argon Ar Chemical compound 0.000 description 1
- 241000195940 Bryophyta Species 0.000 description 1
- NOOLISFMXDJSKH-UHFFFAOYSA-N DL-menthol Natural products CC(C)C1CCC(C)CC1O NOOLISFMXDJSKH-UHFFFAOYSA-N 0.000 description 1
- LPHGQDQBBGAPDZ-UHFFFAOYSA-N Isocaffeine Natural products CN1C(=O)N(C)C(=O)C2=C1N(C)C=N2 LPHGQDQBBGAPDZ-UHFFFAOYSA-N 0.000 description 1
- 240000008790 Musa x paradisiaca Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 229920002614 Polyether block amide Polymers 0.000 description 1
- 229920006895 TPC ET Polymers 0.000 description 1
- 229920006417 TPC-ET Polymers 0.000 description 1
- 244000290333 Vanilla fragrans Species 0.000 description 1
- 235000009499 Vanilla fragrans Nutrition 0.000 description 1
- 235000012036 Vanilla tahitensis Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000560 biocompatible material Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229960001948 caffeine Drugs 0.000 description 1
- VJEONQKOZGKCAK-UHFFFAOYSA-N caffeine Natural products CN1C(=O)N(C)C(=O)C2=C1C=CN2C VJEONQKOZGKCAK-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 235000019506 cigar Nutrition 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940073505 ethyl vanillin Drugs 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229940117955 isoamyl acetate Drugs 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229940041616 menthol Drugs 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000011929 mousse Nutrition 0.000 description 1
- 229960002715 nicotine Drugs 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920006146 polyetheresteramide block copolymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000011364 vaporized material Substances 0.000 description 1
Images
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
- A24F40/10—Devices using liquid inhalable precursors
Definitions
- the present invention concerns a cartridge for an aerosol generating device and an associated aerosol generating set.
- aerosol generating devices comprise a storage portion for storing a vaporizable material, also known as aerosol forming precursor, which can comprise for example a liquid.
- a heating system is formed of one or more electrically activated resistive elements arranged to heat said precursor to generate the aerosol.
- the aerosol is released into a flow path extending between an inlet and outlet of the device.
- the outlet may be arranged in a mouthpiece, through which a user inhales for delivery of the aerosol.
- the aerosol generating devices comprise generally a battery able to power the heating system.
- the powering may be controlled by a control module connecting the heating system to the battery via an electric circuit.
- the electrically activated resistive elements of the heating system are wound around a wick or ceramic heater. Said heater is connected to the flow path.
- such cartridge may suffer from leakage. Indeed, during its lifetime, pressure inside the storage portion varies regularly. These pressure variations derive from vaping and/or from temperature variations. For example, when the user vapes, air is entering the storage portion and forms bubbles. When the temperature decreases, these air bubbles tend to shrink. This leads to under pressure inside the storage portion and to more air being sucked in the storage portion via the heater. According to another example, when the user vapes and when the temperature rises, air bubbles within the storage portion expand. This leads to overpressure inside the storage portion and to leakage of liquid through the wick or ceramic heater.
- One of the aims of the present invention is to propose a cartridge with improved impermeability of the storage portion.
- the invention relates to a cartridge for an aerosol generating device, comprising:
- the impermeability of the cartridge is improved.
- the risk of liquid leakage is reduced, as is the risk of air being sucked in the storage portion.
- the expansion chamber is arranged at least partially in the storage portion.
- the cartridge is more compact.
- the internal volume of the expansion chamber is delimited by at least one flexible wall, said flexible wall being deformable so that the internal volume of the expansion chamber is able to expand or shrink.
- the expansion chamber presents a simple mechanism that can lead to expansion or shrinkage of the internal volume of the expansion chamber.
- the deformation rate of the flexible material can be adapted so as to ensure the necessary expansion and shrinkage.
- the flexible wall is made up of silicone, the flexible wall having a thickness between 0.05 mm and 1 mm, preferably between 0,1 mm and 0,6 mm.
- the flexible wall is made up with a durable, reliable and biocompatible material. Furthermore, silicone is particularly stretchable and resistant at relatively small thicknesses so providing a relatively small element inside the chamber.
- Other possible materials may be thermoplastic elastomers (TPE).
- the cartridge further comprises a wick element interposed between an opening of the storage portion and the inside of the storage portion ; the expansion chamber defining a deformation resistance, said deformation resistance being lower than the resistance of pushing the liquid vaporizable material through the wick element in absence of airflow inside the cartridge.
- the deformation of the expansion chamber prevents the leakage of liquid vaporizable material through the wick or ceramic element.
- the ratio of volume of the expansion chamber to volume of the storage portion is between 1:20 and 1:2, preferably between 1:10 and 1:4.
- the expansion chamber is easily fittable within the storage portion.
- the internal volume of the expansion chamber is filled with a gas or comprises a vacuum.
- the manufacturing of the expansion chamber is made easier.
- the expansion and shrinkage rates of the expansion chamber are only defined by the nature of the materials forming the expansion chamber. For example, in case of a flexible wall, these rates can be perfectly predicted, substantially independently from the environmental conditions (temperature, pressure, etc.).
- the nature of the gas can be adapted to ensure the necessary expansion and shrinkage rates of the expansion chamber. These rates are determined based on the nature of the gas as well as the nature of the materials forming the expansion chamber. For example, in case of a flexible wall, these rates can be predicted by analyzing expansion/shrinkage rates of both flexible wall and gas.
- the expansion chamber is entirely formed by a dedicated expansion chamber part, said dedicated expansion chamber part being entirely arranged within the inside of the storage portion.
- the deformability of the expansion chamber is finely tunable, since the entire dedicated expansion chamber part can be precisely manufactured to reach a desired deformability. Also, the expansion chamber is then protected from environmental factors such as dirt accumulation and/or interaction with external objects that could damage the expansion chamber. In some cases, the expansion chamber may be formed in hollow parts of already existing design of cartridges. Thus, in such a case, only few modifications are necessary in this design to implement the invention.
- the cartridge further comprises an airflow duct delimiting an airflow channel extending through the storage portion ; wherein the dedicated expansion chamber part extends around the airflow duct, the internal volume of the expansion chamber having an annular shape, the dedicated expansion chamber part presenting a through-hole, the airflow duct extending through the through-hole.
- the cartridge presents a reduced size.
- the compactness of the cartridge is further improved.
- the cartridge further comprises an airflow duct delimiting an airflow channel extending through the storage portion; the expansion chamber being delimited by at least one rigid wall of the airflow duct.
- the manufacturing of the expansion chamber requires less material since the expansion chamber is at least partially delimited by a preexisting part of the cartridge.
- the internal volume of the expansion chamber is delimited by at least one wall of the storage portion.
- the manufacturing of the expansion chamber requires less material since the expansion chamber is at least partially delimited by a preexisting part of the cartridge.
- the cartridge further comprises an airflow duct delimiting an airflow channel extending through the storage portion; the expansion chamber extending around the airflow channel.
- the cartridge presents a reduced size.
- the compactness of the cartridge is further improved.
- the internal volume of the expansion chamber is configured to expand or shrink to compensate pressures differences between the inside of the storage portion and the outside of the cartridge, when no liquid vaporizable material is turned into aerosol.
- the cartridge presents a compensation of pressure differences between the inside of the storage portion and the outside of the cartridge, even when the aerosol generating device is not operated to generate aerosol.
- the cartridge provides leakage prevention even when the cartridge is not used (for example such a leakage can be caused by temperature or atmospheric pressure variations).
- the invention also relates to an aerosol generating set comprising:
- aerosol generating device or “ device” may include a vaping device to deliver an aerosol to a user, including an aerosol for vaping, by means of aerosol generating unit (e.g. an aerosol generating element which generates vapor which condenses into an aerosol before delivery to an outlet of the device at, for example, a mouthpiece, for inhalation by a user).
- the device may be portable.
- “Portable” may refer to the device being for use when held by a user.
- the device may be adapted to generate a variable amount of aerosol, e.g. by activating a heating system for a variable amount of time (as opposed to a metered dose of aerosol), which can be controlled by a trigger.
- the trigger may be user activated, such as a vaping button and/or inhalation sensor.
- the inhalation sensor may be sensitive to the strength of inhalation as well as the duration of inhalation to enable a variable amount of vapor to be provided (so as to mimic the effect of smoking a conventional combustible smoking article such as a cigarette, cigar or pipe, etc.).
- the device may include a temperature regulation control to drive the temperature of the heater and/or the heated aerosol generating substance (aerosol pre-cursor) to a specified target temperature and thereafter to maintain the temperature at the target temperature that enables efficient generation of aerosol.
- aerosol may include a suspension of precursor as one or more of: solid particles; liquid droplets; gas. Said suspension may be in a gas including air. Aerosol herein may generally refer to/include a vapor. Aerosol may include one or more components of the precursor.
- vaporizable material or "aerosol-forming precursor” may refer to one or more of a: liquid; solid; gel; mousse; foam or other substances.
- the vaporizable material may be processable by the heating system of the device to form an aerosol as defined herein.
- the vaporizable material may comprise one or more of: nicotine; caffeine or other active components.
- the active component may be carried with a carrier, which may be a liquid.
- the carrier may include propylene glycol or glycerin.
- a flavoring may also be present. The flavoring may include Ethylvanillin (vanilla), menthol, Isoamyl acetate (banana oil) or similar.
- Figure 1 shows an aerosol generating set 10 comprising an aerosol generating device 12 and a cartridge 14 configured to operate with the aerosol generating device 12.
- the cartridge is preferentially a removable cartridge that can be plugged and unplugged on the aerosol generating device 12.
- the aerosol generating device 12 extends along a device axis A and comprises a housing 21 delimiting a cavity 23 configured to receive, at least partially, the cartridge 14.
- the cavity 23 extends for example according to the device axis A and is delimited by a bottom wall 25 substantially perpendicular to the device axis A and at least one side wall 27 extending substantially along the device axis A.
- the housing 21 delimits an internal space of the device 12 receiving various elements designed to carry out different functionalities of the device 12.
- the internal space can for example receive a power block 31 for powering the device 12, a control module 32 for controlling the operation of the device 12 and at least a device part 39 of a heating system configured to heat a vaporizable material contained in the cartridge 14 as it will be explained in further details below.
- the internal space of the housing 21 may further comprise other internal components performing different functionalities of the device 12 known per se. These internal components will not be explained in detail below.
- Figure 1 presents only a schematic diagram of different components of the aerosol generating set 10 and does not necessarily show the real physical arrangement and dimension of said components. Particularly, such an arrangement can be chosen according to the design of the aerosol generating set and technical features of its components.
- the power block 31 comprises a battery 35 and a battery charger 36.
- the battery 35 is for example a known battery designed to be charged using the power supply furnished by an external source and to provide a direct current of a predetermined voltage.
- the battery charger 36 is able to connect the battery 35 to the external source and comprises for this purpose a power connector (for example a mini-USB or USB-C connector) or wireless charging connector.
- the control module 32 is configured to control the operation of the aerosol generating device 12 and notably, of the heating system to generate aerosol by controlling the powering of this heating system by the battery 35.
- the control module 32 is connected to the battery 35.
- the control performed by the control module 32 is known per se and will not be detailed hereinafter.
- the cartridge 14 extends along a cartridge axis B which, when the cartridge 14 is inserted at least partially in the cavity 23 of the housing 21 of the device 12, is parallel to the device axis A.
- the cartridge 14 comprises a body 51, or cartridge body 51, having a shape at least partially complementary to the shape of the cavity 23.
- the cartridge 14 can be received at least partially inside the cavity 23 of the aerosol generating device 12.
- the cartridge body 51 extends between a proximal end 52 designed to be received entirely in the cavity 23 and a distal end 53 designed to protrude from the cavity 23.
- the distal end 53 is designed to be received in the cavity 23.
- the distal end 53 When the distal end 53 is designed to protrude from the cavity 23, the distal end 53 forms a mouthpiece designed to be in contact with the user's mouth and/or lips during a vaping session.
- the proximal end 52 forms a contact surface 55 extending substantially perpendicularly to the cartridge axis B when the cartridge 14 is received in the cavity 23 and designed to be in contact with the bottom wall 25 of the cavity 23.
- the cartridge 14 comprises a storage portion 56 and a sealed expansion chamber 80.
- the cartridge 14 has other internal elements including notably an airflow duct 57 defining an airflow channel 58, a cartridge part 59 of the heating system and a vaporizing chamber 70.
- the cartridge 14 further defines an internal surface 54 delimiting at least some of its internal components, as it will be explained in further detail below.
- the storage portion 56 is configured for storing the vaporizable material in a liquid form (or liquid vaporizable material) and is delimited by at least a part of the internal surface 54.
- the airflow duct 57 extends for example substantially parallel to the cartridge axis B. It comprises a cylindrical rigid wall.
- “rigid” means that the cylindrical rigid wall has a rigidity that is greater than the rigidity of a flexible wall 82 of the sealed expansion chamber 80 (which will be described in detail below).
- the airflow duct 57 also comprises an inlet 64 and an outlet 65 connected to the airflow channel 58.
- the inlet 64 is connected to the vaporizing chamber 70.
- the outlet 65 extends at the distal end 53 of the cartridge body 51 and is designed to be fluidically connected with the user's mouth during vaping sessions.
- the cartridge part 59 of the heating system comprises a heater 60 and a liquid transport element 62 such as a capillary wick element which can be made from a porous material such as fabric or ceramics.
- a liquid transport element 62 such as a capillary wick element which can be made from a porous material such as fabric or ceramics.
- said wick element is interposed between an opening of the storage portion 56 and the inside of the storage portion 56.
- the wick element is interposed between an opening leading to the airflow channel 58 and the inside of the storage portion 56.
- the wick element extends through at least one opening 77 delimited by the vaporizing chamber 70.
- the wick element extends through two openings 77 delimited by the vaporizing chamber 70.
- both cartridge part 59 and device part 39 of the heating system may comprise a pair of contacts 67 protruding respectfully from the contact surface 55 of the cartridge 14 and from the bottom wall 25 of the cavity 23 (the contacts 67 of the device are not illustrated here). Said contacts 67 make it possible to power the heater 60 from the battery of the device 12, and thus vaporize the vaporizable material delivered by the liquid transport element 62.
- the cartridge part 59 of the heating system may comprise susceptors. These susceptors can be arranged and/or distributed in the storage portion 56 of the cartridge 14.
- the device part 39 of the heating system may comprise electromagnetic emitter(s) configured to produce an electromagnetic field when powered by the battery.
- an emitter can comprise for example a magnetic coil configured to be arranged around the cartridge 14.
- each of the cartridge part 59 and device part 39 of the heating system may comprise a heating plate which is intended to be engaged with the heating plate of the other part to transfer heat to the vaporizable material.
- no cartridge part 59 of the heating system can be provided.
- the device part 39 of the heating system like for example a heating blade, may be configured to penetrate the storage portion 56 of the cartridge 14 to heat directly the vaporizable material.
- the airflow channel 58 extends from the vaporizing chamber 70 to the distal end 53 and aims at guiding an airflow loaded with vaporized material, to the user's mouth, during a vaping session.
- the airflow channel 58 extends through the storage portion 56.
- an external surface of the airflow duct 57 delimits partially the storage portion 56 and makes for example a part of the internal surface 54.
- the internal surface 54 of the cartridge body 51 is composed of any surface which is intended to be in contact with the vaporizable material.
- the internal surface 54 can comprise the surface delimiting the storage portion 56 (including the external surface of the airflow duct 58).
- the vaporizing chamber 70 delimits a vaporizing enclosure 71 fluidically connected with the airflow channel 58 and with the cartridge part 59 of the heating system.
- Said vaporizing chamber 70 comprises a transverse annular ring 72, a lower skirt 73 and an upper skirt 74.
- the transverse annular ring 72 delimits an axial opening 75 that fluidically connects the vaporizing enclosure 71 with the airflow channel 58.
- the lower skirt 73 extends from the annular ring 66 towards the cartridge part 59 of the heating system and delimits the vaporizing enclosure 65.
- the lower skirt 73 delimits each opening 77 through which the wick element extends.
- the upper skirt 74 extends opposite the lower skirt 73, towards the distal end 53.
- the upper skirt 74 and the airflow channel 58 delimit between them an annular space 76.
- the cartridge 14 further comprises a sealed expansion chamber 80 delimiting an internal volume 84 configured to expand or shrink.
- sealed means that the expansion chamber 80 is devoid of any opening that would connect the internal volume 84 of the expansion chamber 80 with the outside of the expansion chamber.
- the expansion chamber 80 is arranged at least partially in the storage portion 56.
- the expansion chamber 80 comprises walls 81 delimiting the internal volume 84.
- the expansion chamber 80 comprises at least one flexible wall 82 deformable so that the internal volume 84 of the expansion chamber 80 is able to expand or shrink.
- the flexible wall has a thickness between 0.05 mm and 1 mm, preferably between 0,1 mm and 0,6 mm.
- the flexible wall 82 is made up of silicone or TPE, such as polyamide block copolymers like polyester-amide, polyether-esteramide or polyether-amide block or such as copolyester elastomers (COPE) like polyether-ester copolymers (TPC-ET).
- the expansion chamber 80 is made of silicone or TPE. According to the examples shown on Figures 2 to 5 , the expansion chamber 80 extends around the airflow channel 58.
- the expansion chamber 80 defines a deformation resistance, said deformation resistance being lower than the resistance of pushing the liquid vaporizable material through the liquid transport element 62, for instance the wick or ceramic element, in absence of airflow inside the cartridge 14. Thanks to that, a pressure increase inside the storage portion 56 leads to a deformation of the expansion chamber 80 rather than to a leakage of liquid vaporizable material through the wick element.
- the sealed expansion chamber 80 will tend to shrink before liquid vaporizable material leaks through the liquid transport element 62.
- the deformation of the expansion chamber 80 thus reduces the risk of leakage of liquid vaporizable material through the liquid transport element 62.
- a pressure decrease inside the storage portion 56 leads to a deformation of the expansion chamber 80 rather than to air being sucked in the storage portion through the wick or ceramic material.
- the internal volume 84 of the expansion chamber 80 is configured to expand or shrink to compensate pressure differences between the inside of the storage portion 56 and the outside of the cartridge 14, for instance when no liquid vaporizable material is turned into aerosol, in other terms when the aerosol generating device 12 is not operated to generate aerosol.
- the internal volume 84 of the expansion chamber 70 is entirely arranged within the inside of the storage portion 56.
- the internal volume 84 of the expansion chamber 80 is variable between a minimum internal volume (as shown on Figure 3 ) and a maximum internal volume (as shown on Figure 4 ).
- the ratio between the maximum internal volume and the minimum internal volume is for example comprised between 1,05 and 2, advantageously between 1,1 and 1,9, and is for example equal to 1,5.
- the shape of the flexible wall 82 is shown in dotted lines when the internal volume is maximum and minimum.
- the minimum internal volume is defined as the maximum possible volume of air 1 inside the storage portion 56.
- the internal volume 84 of the expansion chamber 80 is delimited by at least the flexible wall 82.
- the internal volume 84 can reach the minimum internal volume or the maximum internal volume thanks to the deformation of the flexible wall 82.
- the internal volume 84 of the expansion chamber 80 is filled with a gas, for example nitrogen N 2 , carbon dioxide CO 2 , oxygen O 2 , nitrous oxide N 2 O, Argon Ar, sulfur oxide SO 2 , helium He and/or other gases, or comprises a vacuum.
- the expansion rate of the flexible wall 82 and if applicable of the gas defines the ratio between the maximum internal volume and the minimum internal volume of the expansion chamber 80.
- the expansion chamber 80 is entirely formed by a dedicated expansion chamber part 86 arranged entirely within the inside of the storage portion 56.
- the internal volume 84 of the dedicated expansion chamber part 86 has an annular shape.
- the dedicated expansion chamber 86 presents a through-hole 87 through which the airflow duct 57 extends.
- the dedicated expansion chamber part 86 has an inner annular wall 88 applied against the airflow duct 57 and delimiting the though-hole 87, an outer annular wall 89 and two transverse annular walls 90 connecting the inner and outer annular walls 88, 89.
- the internal volume 84 is delimited by the inner annular wall 88, the outer annular wall 89 and the two transverse annular walls 90.
- the outer annular wall 89 is the flexible wall 82.
- the inner annular wall 88, the outer annular wall 89 and the transverse annular walls are all flexible walls 82, in particular made up of silicon or similar flexible material such as TPE.
- the dedicated expansion chamber part 86 also comprises a proximal skirt 92 extending from a transverse annular wall 90 towards the vaporizing chamber 70. As shown on Figures 2 to 4 , the proximal skirt 92 extends in a snap-fit way with the annular space 76 defined by the vaporizing chamber 70.
- the proximal skirt 92 is compressed between the airflow duct 57 and the upper skirt 74 of the vaporizing chamber 70 so that the expansion chamber 80 is fixed to the vaporizing chamber 70.
- the inner annular wall 88 is further glued to the airflow duct 57 or fixed in any other suitable manner.
- the expansion chamber is delimited by at least one rigid wall of the airflow duct 57.
- rigid means that the at least one rigid wall of the airflow duct 57 has a rigidity that is greater than the rigidity of the flexible wall 82 of the sealed expansion chamber 80. In other word, the at least one rigid wall is less deformable than the flexible wall 82.
- the internal volume 84 of the expansion chamber 80 is delimited by at least one wall of the storage portion 56.
- the internal volume 84 of the expansion chamber 80 is delimited by the airflow duct 57, the internal surface 54 of the cartridge body 51 and a flexible membrane 96 which is here the flexible wall 82.
- the expansion chamber 80 is arranged in a distal end of the storage portion 56.
- the flexible membrane 96 extends substantially perpendicular to the device axis A in a rest position (shown on Figure 5 ) in which no overpressure or under pressure reigns within the storage portion.
- the internal volume 84 of the expansion chamber 80 is variable between a minimum internal volume and a maximum internal volume for both of which the shape of the flexible membrane 96 is shown in dotted lines on Figure 5 .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP22172705.0A EP4275525A1 (fr) | 2022-05-11 | 2022-05-11 | Cartouche de dispositif de génération d'aérosol comprenant une chambre d'expansion, et ensemble de génération d'aérosol associé |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22172705.0A EP4275525A1 (fr) | 2022-05-11 | 2022-05-11 | Cartouche de dispositif de génération d'aérosol comprenant une chambre d'expansion, et ensemble de génération d'aérosol associé |
Publications (1)
Publication Number | Publication Date |
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EP4275525A1 true EP4275525A1 (fr) | 2023-11-15 |
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Family Applications (1)
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EP22172705.0A Pending EP4275525A1 (fr) | 2022-05-11 | 2022-05-11 | Cartouche de dispositif de génération d'aérosol comprenant une chambre d'expansion, et ensemble de génération d'aérosol associé |
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EP (1) | EP4275525A1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180035717A1 (en) * | 2014-12-15 | 2018-02-08 | Philip Morris Products S.A. | E-liquid collapsible cartridge |
CN112315034A (zh) * | 2020-11-13 | 2021-02-05 | 深圳麦克韦尔科技有限公司 | 一种防漏液烟弹及电子雾化装置 |
WO2021089656A1 (fr) * | 2019-11-07 | 2021-05-14 | Jt International Sa | Cartouche pour cigarette électronique |
-
2022
- 2022-05-11 EP EP22172705.0A patent/EP4275525A1/fr active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180035717A1 (en) * | 2014-12-15 | 2018-02-08 | Philip Morris Products S.A. | E-liquid collapsible cartridge |
WO2021089656A1 (fr) * | 2019-11-07 | 2021-05-14 | Jt International Sa | Cartouche pour cigarette électronique |
CN112315034A (zh) * | 2020-11-13 | 2021-02-05 | 深圳麦克韦尔科技有限公司 | 一种防漏液烟弹及电子雾化装置 |
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