EP2637801A1 - Aerosolgenerator - Google Patents

Aerosolgenerator

Info

Publication number
EP2637801A1
EP2637801A1 EP11775976.1A EP11775976A EP2637801A1 EP 2637801 A1 EP2637801 A1 EP 2637801A1 EP 11775976 A EP11775976 A EP 11775976A EP 2637801 A1 EP2637801 A1 EP 2637801A1
Authority
EP
European Patent Office
Prior art keywords
wall
chamber
proximal
cartridge
liquid
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.)
Withdrawn
Application number
EP11775976.1A
Other languages
English (en)
French (fr)
Inventor
Fredrik Andersson
Christian Tache
Amir Feriani
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.)
British American Tobacco Investments Ltd
Original Assignee
British American Tobacco Investments Ltd
British American Tobacco Co Ltd
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 British American Tobacco Investments Ltd, British American Tobacco Co Ltd filed Critical British American Tobacco Investments Ltd
Publication of EP2637801A1 publication Critical patent/EP2637801A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—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
    • A24F40/05—Devices without 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
    • A24F40/10—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
    • A24F40/48—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
    • A24F40/50—Control or monitoring
    • A24F40/53—Monitoring, e.g. fault detection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
    • A61M11/005—Sprayers or atomisers specially adapted for therapeutic purposes using ultrasonics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0085—Inhalators using ultrasonics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/06—Inhaling appliances shaped like cigars, cigarettes or pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0653—Details
    • B05B17/0676—Feeding 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
    • A61M2016/0018—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical
    • A61M2016/0024—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical with an on-off output signal, e.g. from a switch
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3317—Electromagnetic, inductive or dielectric measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/583—Means for facilitating use, e.g. by people with impaired vision by visual feedback
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/82—Internal energy supply devices
    • A61M2205/8206—Internal energy supply devices battery-operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0638—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced by discharging the liquid or other fluent material through a plate comprising a plurality of orifices

Definitions

  • This invention relates to an aerosol generator which uses a vibratory source such as a piezoelectric device to atomise liquid to produce an aerosol and a cartridge for use in such a generator, and has particular but not exclusive application to providing an aerosol of a liquid containing a nicotine based substance or a flavourant, which may be used as a substitute for a conventional cigarette.
  • Piezoelectric generators have been proposed hitherto for creating an atomised spray.
  • WO 2002/241777 discloses the use of a piezo device both to create vibrations in a fluid flow and also to monitor the flow by using the device as a pressure transducer.
  • FR 2929861 illustrates that it is known to use capillary action to feed liquid to a piezo electric actuator to create an aerosol.
  • JP 2004313871 discloses an atomiser using piezo device which feeds vibrations through a horn to focus them when creating the aerosol spray.
  • the present invention provides an improved aerosol generator that utilises a cartridge of liquid to be aerosolised, which may be used as a cigarette substitute device.
  • the invention provides a cartridge for an aerosol generator, comprising a chamber to receive an aerosolisable liquid, the chamber having proximal and distal ends, a generally tubular inner chamber wall extending longitudinally between the proximal and distal ends, a longitudinally extending outer chamber wall surrounding the inner wall, a proximal inner end wall bridging the inner wall at the proximal end, a proximal outer end wall
  • the capillary passageway may narrow from the distal end towards the proximal end so that the force due to capillary action on the liquid increases towards the proximal end.
  • the invention also includes an aerosol generator configured to receive the cartridge, comprising a generally tubular housing, an elongate horn member configured
  • Figure 1 is the schematic perspective view of an aerosol generator
  • Figure 2 is a longitudinal sectional view of the generator shown in Figure 1,
  • Figure 3 is a perspective view of a cartridge for use in the aerosol generator
  • FIG 4 is an exploded view of the cartridge illustrated in Figure 3
  • Figure 5 is an enlarged sectional view of the cartridge when installed in the mouth piece of the aerosol generator, with the horn removed,
  • Figure 6 is a sectional view of the cartridge installed in the mouthpiece of the generator, also illustrating the horn in section,
  • Figure 7 is a schematic circuit diagram of a driver circuit board used in the device to actuate the piezoelectric generator.
  • Figure 8 is a schematic circuit diagram of a detection circuit to detect when the user sucks on the mouthpiece, to actuate the device and produce an aerosol with the circuitry shown in Figure 6.
  • an aerosol generator 1 has a generally cylindrical outer surface extending from a generally circular proximal end 2 to circular distal end 3.
  • the device 1 has a main housing 4 and a mouthpiece housing 5 with a proximal end aperture 6 through which aerosol is delivered to a user.
  • the mouthpiece 5 is removably mounted on the housing 4, for example as a push-fit or bayonet mounting (not shown).
  • a cartridge 7 containing an aerosolisable liquid is received within the mouthpiece housing 5 and can be interchanged when empty by removal of the housing 5 from the main body housing 4.
  • main housing 4 contains a horn 8 on which is mounted a piezoelectric transducer 9.
  • the housing 4 also contains electrical circuitry 10 coupled to the piezoelectric transducer 9 both to cause it to oscillate and also to detect pressure variations when the user draws on the mouthpiece housing 5.
  • the circuitry 10 is driven by batteries 11 in the housing 4.
  • a LED 12 is mounted at the distal end 3 of the device, to be driven by the circuitry 10 to indicate when the device is in use.
  • the cartridge 7 is illustrated in more detail in Figures 3 and 4.
  • the cartridge 7 has generally toroidal configuration with a generally tubular inner chamber wall 13 having a distal end opening 14 (shown in Figure 5) and extending from proximal end 15 to distal end 16.
  • a tubular outer chamber wall 17 surrounds the inner chamber wall 13 and also extends between the proximal and distal ends 15, 16.
  • a proximal inner end wall 18 closes the proximal end of the inner chamber wall so that the interior of the inner chamber wall 13 together with the proximal inner end wall 18 define a receptacle open at the distal end 16, that receives the horn 8 as will be described in more detail hereinafter.
  • the outer chamber wall 17 is closed at its proximal end by an outer proximal end wall 19 that is longitudinally spaced from the proximal inner end wall 18 to define a discharge region 20 shown clearly in Figure 5.
  • the proximal outer end wall 19 includes an opening 21 that receives a nozzle plate 22 formed with at least one aperture 23 for forming an aerosol from liquid in the cartridge, to be supplied into the mouthpiece housing 5.
  • a generally frustoconical capillary driver wall 24 is mounted on the interior surface of the proximal outer end wall 19 so as to provide a capillary passageway 25, illustrated in Figures 4 and 5, between the inner chamber wall 13 and the capillary driver wall 24.
  • the passageway 25 narrows from the distal end 16 towards the proximal end 15.
  • the space between the inner and the outer chamber walls 13, 17, contains liquid from which aerosol is formed.
  • the capillary driver wall 24 cooperates with the inner chamber wall 13 to drive the liquid by capillary action into the discharge region 20.
  • Apertures 26 in the proximal outer wall 19 allow air to enter into the cartridge 7 in order to prevent an air lock, as illustrated by arrows 27.
  • the liquid is illustrated by reference 28 in Figures 5 and 6.
  • the passage of the liquid 28 towards the discharge region 20 is illustrated by arrows 29.
  • the horn 8 has a frustoconical or cylindrical tongue 30 that fits through the opening 14 closely within the interior of recess 31 formed by the inner chamber wall 13.
  • the tongue 30 has a proximal end 32 that is spaced from the interior surface of the proximal inner end wall 18.
  • the inner surface of the inner chamber wall 13 and the outer surface of the tongue 30 may include cooperating grooves and recesses 33, 34 to releasably hold the tongue within the chamber wall when the cartridge is inserted into the generator.
  • the horn 8 also includes a generally cylindrical base member 35 from which the tongue 30 extends, the base number being mounted in a resilient mounting that comprises an O ring 36, within the main housing 4.
  • the piezoelectric device 9 is mounted on the distal end 38 of the horn 8, on the base number 35 so that on actuation the horn can vibrate back and forth longitudinally within interior cylindrical region 37 of the main housing 4.
  • the piezoelectric device 9 is actuated and produces ultrasonic vibrations in the base member 35, which are transmitted along and are focussed by the tongue 30 onto the inner chamber wall 13.
  • the spacing between the end 32 of the tongue and the proximal inner chamber wall 18, ensures that the wall 18 is free to vibrate in the manner of a drum which causes liquid in the discharge region 20 to be urged through the aperture 23 to form an aerosol 39 that is illustrated in Figure 5, which is directed through the outlet 6 of the mouthpiece housing 5.
  • main housing 4 includes an air inlet aperture 41 which, referring to Figure 6, allows air to enter in the direction of arrows 42 and pass through longitudinal passageways defined by diametrically opposed exterior grooves 43 in the outer chamber wall 17, illustrated in Figures 3 and 4.
  • the mouthpiece housing 5 defines a plenum 44 between the outlet 6 and the proximal outer end wall 19 of the cartridge 7.
  • the air flow 40 shown in Figure 6 mixes with the aerosol 39 shown in Figure 5 and passes to the user through outlet 6.
  • the resulting pressure reduction in plenum 44 is detected by the piezoelectric device 9 which is coupled to electrical circuitry that switches an electrical drive to the device 9 in order to cause it to produce the aerosol 39.
  • the electrical circuitry is shown in Figures 7 and 8 and includes a breath detector circuit 45 together with a driver circuit 46.
  • the driver circuit 46 is shown in detail in Figure 7 and includes a micro controller 47 responsive to an output from the breath detector circuit 45 indicative that the user is drawing on the mouthpiece housing 5.
  • the breath detector circuit 45 provides a step voltage change in response to the user drawing on the mouthpiece housing 5, and in response, the micro controller 47 generates a pulsed rectangular waveform as illustrated in graph Gl, which is applied to a driver circuit 48, that acts as a modulator to modulate the output of an oscillator 49 typically operating a frequency in a range of 420 -450 KHz illustrated in graph G2, although other suitable frequencies could be used.
  • the resulting modulated output is shown in graph G3 and supplied to a voltage converter circuit 50 and then to a switching circuit 51 that supplies the modulated waveform to the piezoelectric device 9 at a frequency to cause it to produce ultrasonic vibrations which, as previously explained are transmitted through the horn 8 to the discharge region 20 to cause ejection of liquid 28 through nozzle 23 as the aerosol 39 shown in Figure 5.
  • the components of the driver circuit 46 receive a regulated drive voltage from regulator 52 that is powered by batteries 53 which, as previously explained, are mounted in the battery compartment 11 shown in Figure 2.
  • the batteries may also illuminate the LED 12 shown in Figure 2 either continuously or when the driver circuit 46 is actuated.
  • the batteries 53 may be rechargeable batteries in which case an external battery charger 54 may be provided, for example as a cradle or some other convenient configuration to allow the batteries 53 to be recharged by the user.
  • the breath detector circuit 45 comprises a preamplifier 55 which amplifies a signal received via the switching circuit 51 from the piezoelectric element 9, and the amplified signal is illustrated schematically in graph G4.
  • a signal processor 56 detects the envelope of the signal shown in graph G4 and a threshold detector 57 detects step changes in the signal from the processor 56.
  • a threshold detector 57 detects step changes in the signal from the processor 56.
  • the mouthpiece which can be detected by threshold detector 57 to switch on the driver circuit 46.
  • the voltage output from the threshold detector 57 is illustrated schematically in graph G8.
  • the piezoelectric element 9 switches from being a pressure sensor to a ultrasonic driver so as to produce the aerosol 39 in response to the user drawing on the mouthpiece housing 5. It will be noted that the piezo detects the air turbulence resulting from drawing on the mouthpiece without actually being directly exposed directly to the airflow itself.
  • the components of the breath detector circuit 45 are driven by the batteries 53.
  • the aerosol generator device can produce an aerosol from the liquid 28 in the cartridge 7.
  • the liquid may contain a suitable active ingredient such as nicotine, which case the device may be used as a substitute for a conventional cigarette.
  • the liquid may contain a flavourant in addition to or instead of nicotine or may contain other active ingredients.
  • the mouthpiece housing 5 may be removed and the cartridge 7 pulled away from the horn 8 and replaced with another.
  • the piezoelectric arrangement provides an efficient aerosol generation technique.
  • the shape of the tongue 30 of horn 8 amplifies the ultrasonic vibrations from the piezoelectric element 9 onto the inner proximal end wall 18 which because of its spacing from the proximal end 32 of the tongue, is free to vibrate like a drum and hence pressurise liquid in the discharge region 20 to drive the liquid through the aperture 23 to form the aerosol.
  • the progressively tapering of the capillary passageway 25 assists in transporting liquid from the interior of the cassette to the discharge region, producing a progressively increasing capillary force along the cartridge towards the proximal end 15 for driving the liquid 28 into the discharge region 20.
  • gravity assists with driving the liquid 28 from the space between the outer chamber wall 17 and the capillary driver wall 24, into the capillary passageway 25, to assist in delivery of the liquid to the discharge region 20.
  • the driver 48 or the voltage converter 50 may be configured to adaptively adjust its voltage to compensate the load variations of the piezo device from cartridge to cartridge so as to maintain a uniformity of the aerosol spray 39 produced when cartridges are changed in the device.
  • nozzle(s) 23 may be formed directly in the cartridge outer wall rather than in a separate nozzle plate.
  • breath detection may be performed by other means than the piezo device to allow simultaneous aerosol generation and breath detection.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Special Spraying Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
EP11775976.1A 2010-11-08 2011-10-27 Aerosolgenerator Withdrawn EP2637801A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1018796.1A GB201018796D0 (en) 2010-11-08 2010-11-08 Aerosol generator
PCT/EP2011/068908 WO2012062600A1 (en) 2010-11-08 2011-10-27 Aerosol generator

Publications (1)

Publication Number Publication Date
EP2637801A1 true EP2637801A1 (de) 2013-09-18

Family

ID=43414491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11775976.1A Withdrawn EP2637801A1 (de) 2010-11-08 2011-10-27 Aerosolgenerator

Country Status (11)

Country Link
EP (1) EP2637801A1 (de)
JP (1) JP2013544141A (de)
KR (1) KR20130116887A (de)
CN (1) CN103180053A (de)
AU (1) AU2011328313A1 (de)
BR (1) BR112013011400A2 (de)
CA (1) CA2814977A1 (de)
GB (1) GB201018796D0 (de)
MX (1) MX2013005173A (de)
RU (1) RU2013126199A (de)
WO (1) WO2012062600A1 (de)

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BR112013011400A2 (pt) 2016-08-02
JP2013544141A (ja) 2013-12-12
AU2011328313A1 (en) 2013-05-09
KR20130116887A (ko) 2013-10-24
WO2012062600A1 (en) 2012-05-18
GB201018796D0 (en) 2010-12-22
CA2814977A1 (en) 2012-05-18
CN103180053A (zh) 2013-06-26
MX2013005173A (es) 2013-07-03

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