WO2022233828A1 - Dispositif d'inhalation comportant au moins un dispositif à jet de liquide, cartouche pour un dispositif d'inhalation et procédé de transport de gouttes de liquide dans un dispositif d'inhalation - Google Patents

Dispositif d'inhalation comportant au moins un dispositif à jet de liquide, cartouche pour un dispositif d'inhalation et procédé de transport de gouttes de liquide dans un dispositif d'inhalation Download PDF

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Publication number
WO2022233828A1
WO2022233828A1 PCT/EP2022/061782 EP2022061782W WO2022233828A1 WO 2022233828 A1 WO2022233828 A1 WO 2022233828A1 EP 2022061782 W EP2022061782 W EP 2022061782W WO 2022233828 A1 WO2022233828 A1 WO 2022233828A1
Authority
WO
WIPO (PCT)
Prior art keywords
cartridge
inhalation device
liquid
liquid jet
needle
Prior art date
Application number
PCT/EP2022/061782
Other languages
English (en)
Inventor
James Alan Mott
Simon Dodd
Bruce Michael Eckard
Jeffrey John GLASSETT
Joseph Winn FISKE
Steve BURNEY
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 EP22727091.5A priority Critical patent/EP4333655A1/fr
Publication of WO2022233828A1 publication Critical patent/WO2022233828A1/fr

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
    • 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
    • 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
    • A24F40/30—Devices using two or more structurally separated inhalable precursors, e.g. using two liquid precursors in two cartridges

Definitions

  • INHALATION DEVICE WITH AT LEAST ONE LIQUID JET DEVICE, CARTRIDGE FOR AN INHALATION DEVICE AND METHOD OF CONVEYING LIQUID DROPS IN AN INHALATION DEVICE
  • the invention relates to an inhalation device, in particular an electronic cigarette, with at least one liquid jet device, a cartridge for an inhalation device and a method of conveying liquid drops in an inhalation device.
  • inhalation devices such as e-cigarettes have become popular as a replacement for conventional smoking articles.
  • a certain amount of liquid has to be stored in the inhalation device, preferably in a replaceable cartridge and has to be delivered appropriately to a heater so as to form an aerosol.
  • US 2020 0308107 A1 is related to such a smoking article comprising a reservoir containing an aerosol precursor composition being in fluid communication with a microheater.
  • GB 2542921 B discloses a vaporizer having a micro pump. A cartridge containing liquid can be inserted into the vaporizer and has a rubber septum which is punctured by a needle. Finally, a similar vaporizer is known from US 10285449 B2.
  • the inhalation device in particular the electronic cigarette, in accordance with claim 1, which has at least one liquid jet device and a hollow needle mounted thereto.
  • the inhalation device of the present disclosure may be an electronic cigarette.
  • the inhalation device essentially uses drop-on demand technology similar to inkjet printers.
  • liquid drops to be delivered so as to form an aerosol are produced on demand.
  • an appropriate interface between a liquid container, typically in the form of a replaceable cartridge insertable into the inhalation device needs to be provided. This is, according to the invention, achieved by means of a hollow needle mounted on the liquid jet device.
  • the hollow needle is, as described in more detail below, adapted to puncture a septum closing the cartridge in an original state and will then reliably deliver liquid to the liquid jet device of the inhalation device.
  • a volume between the cartridge and the drop outlet i.e. the location, where the drop is delivered to the liquid jet device, can advantageously be minimized, so that contamination can be significantly reduced.
  • different fluids or liquids are used in an inhalation device in succession, and it is then desirable to quickly change from one liquid to the other. This is advantageously supported by the structure in accordance with the invention, in which the described volume between the cartridge and the drop outlet is minimized.
  • the hollow needle adapted to puncture a septum and extending into the liquid contained in the cartridge, undesirable introduction of air into the fluidic path can be avoided.
  • leaking of fluid from the device can be minimized by means of the hollow needle, which will retain liquid due to capillary forces. At the same time, air cannot enter the fluidic path, even when the cartridge is just to be inserted into the device.
  • liquid jet device providing same as an MEMS (Micro-Electro-Mechanical System) has proven efficient, as such a technology is well established for drop on demand technology .
  • MEMS Micro-Electro-Mechanical System
  • a spring-loaded plate can advantageously be provided so as to surround the needle in a manner to extend beyond the needle point, when the spring element is at least partly relaxed.
  • the needle point is protected from being touched, when no cartridge is present, and is pushed back so as to expose the needle point and allow it to puncture a septum of the cartridge.
  • the described function of the spring-loaded plates which involves a certain movement of the same, can be made particularly reliable, when the inhalation device and/or the plate has means for positioning the spring element biasing the plate. This is further supported by the optional feature that the needle is adapted to guide the spring-loaded plate.
  • the invention is also related to a cartridge for an inhalation device with at least one liquid jet device and a hollow needle, the cartridge having at least two septa, at least one of them having a hole adapted to tightly seal around the needle of the inhalation device.
  • the cartridge can advantageously be combined with the inhalation device.
  • the combination of the at least two septa provides a leak free cartridge in its detached state, i.e. when the cartridge is not combined with the inhalation device.
  • a liquid tight seal is obtained with minimal force, allowing fluid to pass through the needle without exiting the septa seal.
  • This is particularly important in the cartridge as a detached cartridge is likely to be carried in any orientation with significant shock type deceleration during handling.
  • the cartridge has a one-time seal that is removed prior to use.
  • a user may insert and then remove the cartridge multiple times if they desire to change the flavor, for example.
  • the combination of the at least two septa provides a reusable seal.
  • the one septum may be provided with the hole adapted to tightly seal around the needle of the inhalation device and the other septum may be provided with a slit that is adapted to tightly seal the other septum to thereby completely close the cartridge, when the needle is not present, i.e. when the cartridge is not combined with the inhalation device.
  • the one septum creates a tight seal around the needle, when the needle is inserted.
  • the hole provided in the one septum remains open.
  • the other septum is tightly sealed, when the needle is not present.
  • the slit provided in the other septum does not tightly seal around the needle. Accordingly, with this dual-septa configuration, the cartridge is tightly sealed both in a state when the needle is present and in a state when the needle is not present, i.e. inserted. Accordingly, leakage of fluid is prevented in both states.
  • the septum may be made of a bio-compatible material.
  • the septum is not the primary fluid path but it is possible for the septum to contact the fluid and then have the fluid delivered to the liquid jet device.
  • the septum is made of PTFE/Rubber (butyl) type material.
  • PTFE/Rubber butyl
  • natural rubber, silicone, or polyvinylchloride are other viable options .
  • the cartridge can in particular have the container and at least one a cap, to which a capillary tube can be attached.
  • a capillary tube can be attached.
  • the cap is preferably connected to the container by means of a thread, and at least one seal can be provided between the cap and the container in order to avoid fluid leakage between the two.
  • the at least one seal is provided between the container and the (threaded) cap.
  • a threaded cap is unusual in that it can provide a reusable seal for keeping fluid in the cartridge and keeping contamination out of the container.
  • the seal which may be made of a rubber material, can deform to provide an improved connection between the threaded cap and the container.
  • the capillary tube which can also be called an internal tube typically extends from a delivery outlet, and the capillary tube and/or the absorbing element extend substantially to the bottom of the container opposite the delivery outlet.
  • the invention serves to provide fluid damping to the liquid delivery system, so that essentially all liquid in the reservoir can be delivered, before air enters the liquid path, which would cause a deprime.
  • the capillary tube which can also be called a pickup tube or dip tube extends from the delivery outlet of the container and essentially draws liquid towards the delivery outlet, when the device is oriented with the delivery outlet essentially at the top.
  • the absorbing element is combined with the capillary tube and provides enough back pressure to avoid too much liquid to be delivered to the liquid device, even when the device is oriented with the delivery outlet downwards.
  • the absorbing element which can for example be a piece of foam or a wick, absorbs a certain amount of liquid and retains this to provide a kind of damper, so that even in case of a rapid movement or "sloshing" of the container, air does not enter the liquid delivery system.
  • the wick provides a steady state continuous flow of fluid to the liquid jet device. Its capillary structures allow for consistent fill rates and pressure for the fluid supply. Further, the liquid retained in the capillary tube and the absorbing element allows the device to function for some time, even when the delivery outlet is oriented downwards and the level of liquid is too low to allow the capillary tube or the absorbing element to contact the liquid. That is, the absorbing element, such as the wick, acting as a temporary supply of fluid, absorbs a few puffs worth of fluid. If an inhalation device (and its corresponding cartridge/liquid supply) is moved in certain orientations during use, the liquid supply may not be in continuous contact with the liquid jet.
  • the wick allows for fluid to be absorbed in certain orientations and then dispenses fluid in any orientation.
  • the movement of the fluid within the device/container can keep the wick supplied with fluid, in turn supplying the liquid jet during use in non-standard orientations.
  • the absorbing element can for example be inserted at the end of the capillary tube opposite the delivery outlet.
  • the capillary tube can work in conjunction with the absorbing element, preferably the wick.
  • the wick can absorb and deliver fluid to the capillary tube.
  • the capillary tube is volumetrically more efficient than the wick. Using both the wick and the capillary tube, a larger volume of fluid can be stored for non-standard orientation use of the device when compared with a similarly sized wick-only system.
  • the wick can be formed of cigarette filter material.
  • the liquid jet device as described herein essentially corresponds to an inkjet device commonly used in printers .
  • a volume of the capillary tube corresponds to two or three puffs (two or three puffs correspond to 10 pL or 15 pL, respectively).
  • the user can vape for two or three puffs, before the capillary tube is empty, and the orientation of the device has to be changed, in order to fill the capillary tube with liquid.
  • an inner diameter of 1 to 3 mm has proven efficient. Beyond 3 mm and in particular towards 4 mm, capillary action cannot be ensured any longer, in particular when using liquids with a low surface tension. On the other hand, with an inner diameter below 1 mm, the inner volume of the capillary tube becomes very small, the flow rate decreases and the delivery of liquid is stopped too quickly.
  • the capillary tube can be between 5 and 30 mm, and the same applies to the length of the absorbing element.
  • a very short capillary tube for example having a length of only 5 mm
  • a very long absorbing element such as a wick
  • Such a combination has turned out to work as well as an absorbing element being only 3 mm long and inserted into a capillary tube being for example 3 cm long.
  • a combination of an about 3 cm long capillary tube, having an inner diameter of up to 3 mm, with an absorbing element of only about 3 mm length inserted, is currently preferred.
  • a comparably small absorbing element also has the advantage of keeping the retention force on the liquid low and keeping the flow rate high.
  • the combination of the capillary tube and the absorbing element is adapted to deliver liquid to the delivery outlet, also when the delivery outlet is oriented vertically above the bottom of the container.
  • liquid is retained, when the delivery outlet is oriented vertically below the bottom of the content, i.e. the device is held with the delivery outlet oriented downwards.
  • Teflon, Polypropylene and Polyethylene have proven efficient and can also be combined for production of the capillary tube.
  • the desired capillary forces when using the mentioned materials can particularly be achieved, when the liquid is for example a polypropylene glycol/vegetable glycerine mixture or an oil-based perfume, which are common liquids for inhalation devices or aerosol generating devices.
  • the liquid is for example a polypropylene glycol/vegetable glycerine mixture or an oil-based perfume, which are common liquids for inhalation devices or aerosol generating devices.
  • At least two containers as described above can be combined so as to form a cartridge insertable into the inhalation device.
  • the invention also provides a method of conveying liquid in an inhalation device as a liquid jet and by means of a hollow needle. This is preferably effected from at least one replaceable container or cartridge.
  • the cartridge can have two septa, one of which can be opened, in particular punctured, preferably via a slit provided therein, when inserting the cartridge into the inhalation device, and the other one can be combined with a hollow needle extending into the cartridge so as to form fluid tight seal.
  • FIG. 1 shows a perspective view of the inhalation device
  • FIG. 2 shows a cut view of essential parts of the inhalation device of figure 1;
  • FIG. 3 shows a cut view of a part of the inhalation device of figure 1 with a part of one container
  • FIG. 4 shows a cut view of the details of FIG. 3, without any container
  • FIG. 5 shows a cut view of a part of a container
  • FIG. 6 shows two liquid jet devices in greater detail.
  • the inhalation device 10 As can be taken from figure 1, the inhalation device 10 as described herein, is essentially elongate with a mouthpiece 12 at one end and charging contacts 14 at the other end. Any aerosol delivered to the mouthpiece 12 is produced from liquid contained in a cartridge 16, which is essentially accommodated in that half of the inhalation device 10, which is closer to the mouthpiece 12.
  • the cartridge 16 is accommodated in a compartment which can be closed by a lid 18, and a longitudinal axis of the device 10 corresponds to a longitudinal axis of the cartridge 16 and containers forming same as described in more detail below.
  • aerosol 20 is produced by in the present case two liquid jet devices 24, which are provided on a PCA or daughter board 26 with a filter 28 between the liquid delivery system described in more detail below and each liquid jet device 24.
  • the cartridge in this case contains two containers 30, which are substantially structured identically, so that only one of them will be described in more detail below.
  • the container 30 In an upper part of the container 30 it essentially has a cap 32, which can be screwed onto the reservoir part 34 by means of a thread 36.
  • the cap 32 has at least one septum 38, which can be punctured by a hollow needle 40 which is part of the inhalation device 10 in accordance with figure 2.
  • the at least one septum 38 may be provided with a slit. Anything below needle 40 in figure 2 belongs to the cartridge 16, which is replaceable.
  • a capillary tube 42 is attached to the cap 32 and is adapted to deliver liquid towards the delivery outlet at the top of the cartridge 16 in accordance with the orientation of figure 2. The delivery direction of the liquid is indicated by arrows.
  • a connecting tube 44 is attached outside the capillary tube 42 and an absorbing element 46 is attached inside the connecting tube 44.
  • the absorbing element 46 such as a wick, extends substantially to the bottom of the container 30, so that in the orientation of figure 2, essentially all of the liquid contained can be drawn towards the delivery outlet.
  • both caps 32 are essentially circle cylindrical, and this also applies to the reservoir parts 34, which are connected with each other.
  • the inner volume of the reservoir part 34 is also essentially circle cylindrical, in the embodiment shown with a cone shaped lower part.
  • a suitable air path 48 is provided between the capillary tube 42 and the inner surface of the reservoir part 34 in the area of the thread 36 so as to allow air to enter the reservoir part and to avoid the build-up of excessive negative pressure.
  • an O-ring 50 is provided between the reservoir part 34 and the cap 32 as a gasket.
  • Figure 3 essentially shows the situation of figure 2 with a single container, in particular, only the cap 32 and the 0- ring 50 thereof are shown in the upper part of figure 3.
  • the lower container is not shown in figure 3 in order to show a spring-loaded plate 52 in more detail.
  • the spring-loaded plate 52 has been pushed, against the action of a spring 56.
  • the spring 56 acts to push the plate 52 far enough towards the right side in figure 4, that the point of the hollow needle 40 is covered, in order to avoid injuries.
  • This position of the plate 52 is defined by a step 58 in the cavity for accommodating the container.
  • an inner cylindrical cavity 60 of the plate 52 which is in the case shown also formed in a hub 62 extending a significantly longer distance along the hollow needle 40 than the relatively thin plate 52, serves to cooperate with the hollow needle 40 in order to provide some guiding of the plate 52 along the movement direction (from left to right and vice versa in figures 3 and 4).
  • the outer dimension of the plate 52 is chosen so as to be movably accommodated and to some extent guided in the cavity surrounding the movable plate 52.
  • the position of the spring-loaded plate 52 farthest to the left as shown in figure 3 is defined by the hub 62 abutting the base 64, from which the hollow needle 40 extends.
  • the outside diameter of hub 62 which can also be considered a kind of rod, is appropriately sized to align and guide the spiral spring 56 at the right part according to figures 3 and 4.
  • FIG. 5 again shows the cap 32 and O-ring 50 of a container similar to the details of figure 3, as well as the capillary tube 42 thereof.
  • two septa, septum 38 sealing the container in the original, non-used state, and a septum 54 sealing around the hollow needle 40 when inserted are shown in more detail.
  • both of these are essentially circular, the septum 38 to be punctured by the hollow needle 40 is located closer towards the capillary tube 42 and placed on a step 68, and on top of the upper septum 54 there is a retaining ring 70 partly accommodated in a groove 72, in order to secure the septa.
  • the septum 38 may be provided with a slit, having the features as described above.
  • Figure 6 represents in a cross-sectional diagram a portion of an example of an inhalation or aerosol-generation device.
  • the combination of two liquid devices 24 comprises here two microfluidic structures or MEMS dies 150.
  • Each MEMS die 150 has an upper surface or vaporization surface 151.
  • the liquid devices 24 are in fluid communication with two liquid channels 140 each of which is arranged to deliver the liquid aerosolizable material from the reservoir part 34.
  • Each liquid channel 140 is connected to an MEMS die 150 through an inlet port 152. Liquid aerosolizable material is drawn from each liquid channel 140 to a MEMS die 150 by capillary force.
  • Two aerosol flow paths 153 are arranged to fluidly communicate with the mouthpiece of the aerosol-generating device. Each aerosol flow path 153 allows thus the generated aerosol to flow from a MEMS die 150 to the mouthpiece.
  • the airflow paths 153 connect air inlets (not shown) within the aerosol-generating device to the mouthpiece for the passage of air through the aerosol-generating device.
  • each aerosol flow path 153 forms a nozzle 154.
  • the nozzles 154 and the vaporization surfaces 151 are usually on parallel planes. In other words, each nozzle 154 faces a vaporization surface 151.
  • Each nozzle 154 can be offset from the vaporization surface 151 or alternatively, the nozzle 154 and the vaporization surface 151 may align in direction one above the other.
  • incoming air through the air inlets can flow sideways along the vaporization surface 151 and is then pulled up by the nozzle 154.
  • incoming air through the air inlets can flow directly into the airflow path 153 over the vaporization surface 151.
  • the nozzle 154 is jetting either perpendicular to, or in parallel with the airflow of the mouthpiece.

Abstract

Un dispositif d'inhalation (10), en particulier une cigarette électronique, comporte au moins un dispositif à jet de liquide (24), tel qu'un micro-élément chauffant ou une micro-résistance, pour produire des gouttes de liquide à la demande, une aiguille creuse (40) étant montée sur le dispositif à jet de liquide (24). Une cartouche (16) comporte au moins une première membrane (54) assurant l'étanchéité autour de l'aiguille (40) du dispositif d'inhalation (10). En outre, l'invention concerne un procédé de transport de gouttes de liquide dans un dispositif d'inhalation (10) sous la forme d'un jet de liquide, par exemple au moyen d'au moins un dispositif à jet de liquide (24), en particulier un micro-élément chauffant ou une micro-résistance, en combinaison avec une aiguille creuse (40) montée sur le dispositif à jet de liquide (24).
PCT/EP2022/061782 2021-05-06 2022-05-03 Dispositif d'inhalation comportant au moins un dispositif à jet de liquide, cartouche pour un dispositif d'inhalation et procédé de transport de gouttes de liquide dans un dispositif d'inhalation WO2022233828A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22727091.5A EP4333655A1 (fr) 2021-05-06 2022-05-03 Dispositif d'inhalation comportant au moins un dispositif à jet de liquide, cartouche pour un dispositif d'inhalation et procédé de transport de gouttes de liquide dans un dispositif d'inhalation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21172476 2021-05-06
EP21172476.0 2021-05-06

Publications (1)

Publication Number Publication Date
WO2022233828A1 true WO2022233828A1 (fr) 2022-11-10

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PCT/EP2022/061782 WO2022233828A1 (fr) 2021-05-06 2022-05-03 Dispositif d'inhalation comportant au moins un dispositif à jet de liquide, cartouche pour un dispositif d'inhalation et procédé de transport de gouttes de liquide dans un dispositif d'inhalation

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EP (1) EP4333655A1 (fr)
WO (1) WO2022233828A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666977A (en) * 1993-06-10 1997-09-16 Philip Morris Incorporated Electrical smoking article using liquid tobacco flavor medium delivery system
EP1078880A1 (fr) * 1999-08-05 2001-02-28 The Procter & Gamble Company Dispositif de distribution comprenant un récipient et une embase de réception munie de moyens de perçage protégés
US20050016550A1 (en) * 2003-07-17 2005-01-27 Makoto Katase Electronic cigarette
US20190104768A1 (en) * 2017-10-05 2019-04-11 Derek Domenici Inhalation device
US10285449B2 (en) 2015-09-01 2019-05-14 Ayr Ltd. Electronic vaporiser system
GB2542921B (en) 2015-09-02 2019-05-29 Bae Systems Plc Vehicle power sharing system with engine-driven generator and fuel cell
US10314342B2 (en) 2017-10-20 2019-06-11 Altria Client Services Llc E-vaping device using a jet dispensing cartridge, and method of operating the e-vaping device
US20200308107A1 (en) 2019-03-31 2020-10-01 Massachusetts Institute Of Technology Small molecule and polymeric anions for lithium-solvate complexes: synthesis and battery applications

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666977A (en) * 1993-06-10 1997-09-16 Philip Morris Incorporated Electrical smoking article using liquid tobacco flavor medium delivery system
EP1078880A1 (fr) * 1999-08-05 2001-02-28 The Procter & Gamble Company Dispositif de distribution comprenant un récipient et une embase de réception munie de moyens de perçage protégés
US20050016550A1 (en) * 2003-07-17 2005-01-27 Makoto Katase Electronic cigarette
US10285449B2 (en) 2015-09-01 2019-05-14 Ayr Ltd. Electronic vaporiser system
GB2542921B (en) 2015-09-02 2019-05-29 Bae Systems Plc Vehicle power sharing system with engine-driven generator and fuel cell
US20190104768A1 (en) * 2017-10-05 2019-04-11 Derek Domenici Inhalation device
US10314342B2 (en) 2017-10-20 2019-06-11 Altria Client Services Llc E-vaping device using a jet dispensing cartridge, and method of operating the e-vaping device
US20200308107A1 (en) 2019-03-31 2020-10-01 Massachusetts Institute Of Technology Small molecule and polymeric anions for lithium-solvate complexes: synthesis and battery applications

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