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US20200154770A1 - Vapor provision systems - Google Patents

Vapor provision systems Download PDF

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Publication number
US20200154770A1
US20200154770A1 US16/613,037 US201816613037A US2020154770A1 US 20200154770 A1 US20200154770 A1 US 20200154770A1 US 201816613037 A US201816613037 A US 201816613037A US 2020154770 A1 US2020154770 A1 US 2020154770A1
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US
United States
Prior art keywords
user
activation
vapor
power
provision system
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Pending
Application number
US16/613,037
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English (en)
Inventor
Richard Hepworth
Colin Dickens
Patrick Moloney
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Nicoventures Trading Ltd
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Nicoventures Trading Ltd
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Publication date
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Assigned to BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED reassignment BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOLONEY, Patrick, HEPWORTH, RICHARD, DICKENS, COLIN
Publication of US20200154770A1 publication Critical patent/US20200154770A1/en
Assigned to Nicoventures Trading Limited reassignment Nicoventures Trading Limited ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • A24F40/51—Arrangement of sensors
    • 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
    • A24F40/42—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
    • A24F40/60—Devices with integrated user interfaces
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F47/00—Smokers' requisites not otherwise provided for
    • 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
    • A61M11/04—Sprayers or atomisers specially adapted for therapeutic purposes operated by the vapour pressure of the liquid to be sprayed or atomised
    • A61M11/041—Sprayers or atomisers specially adapted for therapeutic purposes operated by the vapour pressure of the liquid to be sprayed or atomised using heaters
    • A61M11/042—Sprayers or atomisers specially adapted for therapeutic purposes operated by the vapour pressure of the liquid to be sprayed or atomised using heaters electrical
    • 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
    • A61M15/0065—Inhalators with dosage or measuring devices
    • A61M15/0066—Inhalators with dosage or measuring devices with means for varying the dose size
    • 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
    • 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
    • A61M2205/27—General characteristics of the apparatus preventing use
    • A61M2205/276—General characteristics of the apparatus preventing use preventing unwanted use
    • 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
    • A61M2205/3331—Pressure; Flow
    • 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
    • A61M2205/3368—Temperature

Definitions

  • the present disclosure relates to vapor provision systems such as nicotine delivery systems (e.g. electronic cigarettes and the like).
  • nicotine delivery systems e.g. electronic cigarettes and the like.
  • Electronic vapor provision systems such as electronic cigarettes (e-cigarettes) generally contain a vapor precursor material, such as a reservoir of a source liquid containing a formulation, typically including nicotine, or a solid material such a tobacco-based product, from which a vapor is generated for inhalation by a user, for example through heat vaporization.
  • a vapor provision system will typically comprise a vapor generation chamber containing a vaporizer, e.g. a heating element, arranged to vaporize a portion of precursor material to generate a vapor in the vapor generation chamber.
  • the supply of power to the vaporizer is activated manually, for example by a user pressing an activation button when they wish to generate vapor for inhalation.
  • the supply of power to the vaporizer is activated automatically in response to user inhalation, for example using a pressure or airflow sensor to detect when a user is inhaling on the device.
  • the amount of power supplied to the vaporizer of an electronic cigarette when the vaporizer is activated affects the user experience. Broadly speaking, a higher amount of power will generate more vapor so the use can inhale correspondingly more of the components comprising the vapor, such as nicotine and/or flavorants. There can also be other effects, for example different vapor temperatures and condensed vapor particle sizes may be associated with different amounts of power supplied to the vaporizer.
  • some electronic cigarettes allow a user to select different levels of power for the vaporizer during use to tailor they experience.
  • some devices may incorporate two activation buttons with each button being associated with the supply of a different amount of power, thereby in effect providing a button for activating a low power mode and a button for activating a high power mode.
  • Other devices may allow a user to set a desired amount of power to use when the vaporizer is activated, e.g., through a menu system.
  • a vapor provision system comprising: a first activation sensor; a second activation sensor; user programming circuitry configured, in response to user input, to store a first user-defined power setting for use in association with the first activation sensor and a second user-defined power setting for use in association with the second activation sensor; and power supply control circuitry configured to control a supply of power to a vaporizer to generate vapor from a vapor precursor material for user inhalation, wherein the power supply control circuitry is configured to control the supply of power to the vaporizer in accordance with the first user-defined power setting in response to detecting user activation of the first activation sensor and to control the supply of power to the vaporizer in accordance with the second user-defined power setting in response to detecting user activation of the second activation sensor.
  • a vapor provision means comprising: first activation means; second activation means; user programming means configured, in response to user input, to store a first user-defined setting for use in association with the first activation means and a second user-defined setting for use in association with the second activation means; and control means configured to control a supply of power to vaporizing means to generate vapor from a vapor precursor material for user inhalation, wherein the control means is configured to control the supply of power to the vaporizing means in accordance with the first user-defined setting in response to detecting user activation of the first activation means and to control the supply of power to the vaporizer in accordance with the second user-defined setting in response to detecting user activation of the second activation means.
  • a method of operating a vapor provision system comprising receiving user input to indicate a first user-defined setting for use in association with a first activation sensor of the vapor provision system and a second user-defined setting for use in association with a second activation sensor of the vapor provision system, and, subsequently, supplying power to a vaporizer to generate vapor from a vapor precursor material for user inhalation in accordance with the first user-defined setting in response to detecting user activation of the first activation sensor and supplying power to the vaporizer to generate vapor from the vapor precursor material for user inhalation in accordance with the second user-defined setting in response to detecting user activation of the second activation sensor.
  • FIG. 1 represents in highly schematic cross-section a vapor provision system in accordance with certain embodiments of the disclosure.
  • FIG. 2 is a flow diagram representing user programming steps for the vapor provision system of FIG. 1 .
  • FIG. 3 is a flow diagram representing operating steps for the vapor provision system of FIG. 1 in normal use to generate vapor.
  • FIG. 4 represents in highly schematic cross-section a vapor provision system in accordance with certain other embodiments of the disclosure.
  • vapor provision systems which may also be referred to as aerosol provision systems, such as e-cigarettes.
  • aerosol provision systems such as e-cigarettes.
  • e-cigarette or “electronic cigarette” may sometimes be used, but it will be appreciated this term may be used interchangeably with vapor provision system/device and electronic vapor provision system/device.
  • vapor ” and “aerosol”, and related terms such as “vaporize”, “volatilize ” and “aerosolize”, may generally be used interchangeably.
  • a cartridge When the vapor precursor material in a cartridge is exhausted, or the user wishes to switch to a different cartridge having a different vapor precursor material, a cartridge may be removed from the control unit and a replacement cartridge attached in its place.
  • Devices conforming to this type of two-part modular configuration may generally be referred to as two-part devices. It is common for electronic cigarettes to have a generally elongate shape. For the sake of providing a concrete example, certain embodiments of the disclosure described herein will be taken to comprise this kind of generally elongate two-part device employing disposable cartridges.
  • FIG. 1 is a cross-sectional view through an example e-cigarette 1 in accordance with certain embodiments of the disclosure.
  • the e-cigarette 1 comprises two main components, namely a reusable part 2 and a replaceable/disposable cartridge part 4 .
  • the reusable part 2 and the cartridge part 4 are releasably coupled together at an interface 6 .
  • the cartridge part may be removed from the reusable part and a replacement cartridge part attached to the reusable part in its place.
  • the interface 6 provides a structural, electrical and air path connection between the two parts and may be established in accordance with conventional techniques, for example based around a screw thread or bayonet fixing with appropriately arranged electrical contacts and openings for establishing the electrical connection and air path between the two parts as appropriate.
  • the specific manner by which the cartridge part 4 mechanically mounts to the reusable part 2 is not significant to the principles described herein, but for the sake of a concrete example is assumed here to comprise a screw thread fitting (not represented in FIG. 1 ). It will also be appreciated the interface 6 in some implementations may not support an electrical and/or air path connection between the respective parts.
  • a vaporizer may be provided in the reusable part rather than in the cartridge part, or the transfer of electrical power from the reusable part to the cartridge part may be wireless (e.g. based on electromagnetic induction), so that an electrical connection between the reusable part and the cartridge part is not needed.
  • the airflow through the electronic cigarette might not go through the reusable part so that an air path connection between the reusable part and the cartridge part is not needed.
  • the cartridge part 4 may in accordance with certain embodiments of the disclosure be broadly conventional.
  • the cartridge part 4 comprises a cartridge housing 42 formed of a plastics material.
  • the cartridge housing 42 supports other components of the cartridge part and provides the mechanical interface 6 with the reusable part 2 .
  • the cartridge housing is generally circularly symmetric about a longitudinal axis along which the cartridge part couples to the reusable part 2 .
  • the cartridge part has a length of around 4 cm and a diameter of around 1.5 cm.
  • the specific geometry, and more generally the overall shapes and materials used, may be different in different implementations.
  • a reservoir 44 that contains liquid vapor precursor material.
  • the liquid vapor precursor material may be conventional, and may be referred to as e-liquid.
  • the liquid reservoir 44 in this example has an annular shape with an outer wall defined by the cartridge housing 42 and an inner wall that defines an air path 52 through the cartridge part 4 .
  • the reservoir 44 is closed at each end with end walls to contain the e-liquid.
  • the reservoir 44 may be formed in accordance with conventional techniques, for example it may comprise a plastics material and be integrally molded with the cartridge housing 42 .
  • the cartridge part further comprises a wick 46 and a heater (vaporizer) 48 located towards an end of the reservoir 44 opposite to the mouthpiece outlet 50 .
  • the wick 46 extends transversely across the cartridge air path 52 with its ends extending into the reservoir 44 of e-liquid through openings in the inner wall of the reservoir 44 .
  • the openings in the inner wall of the reservoir are sized to broadly match the dimensions of the wick 46 to provide a reasonable seal against leakage from the liquid reservoir into the cartridge air path without unduly compressing the wick, which may be detrimental to its fluid transfer performance.
  • the wick 46 and heater 48 are arranged in the cartridge air path 52 such that a region of the cartridge air path 52 around the wick 46 and heater 48 in effect defines a vaporization region for the cartridge part.
  • E-liquid in the reservoir 44 infiltrates the wick 46 through the ends of the wick extending into the reservoir 44 and is drawn along the wick by surface tension/capillary action (i.e. wicking).
  • the heater 48 in this example comprises an electrically resistive wire coiled around the wick 46 .
  • the heater 48 comprises a nickel chrome alloy (Cr20Ni80) wire and the wick 46 comprises a glass fiber bundle, but it will be appreciated the specific vaporizer configuration is not significant to the principles described herein.
  • electrical power may be supplied to the heater 48 to vaporize an amount of e-liquid (vapor precursor material) drawn to the vicinity of the heater 48 by the wick 46 . Vaporized e-liquid may then become entrained in air drawn along the cartridge air path from the vaporization region towards the mouthpiece outlet 50 for user inhalation. As noted above, the rate at which e-liquid is vaporized by the vaporizer (heater) 48 will depend on the amount (level) of power supplied to the heater 48 .
  • electrical power can be applied to the heater to selectively generate vapor from the e-liquid in the cartridge part 4 , and furthermore, the rate of vapor generation can be changed by changing the amount of power supplied to the heater 48 , for example through pulse width and/or frequency modulation techniques.
  • the reusable part 2 comprises an outer housing 12 having with an opening that defines an air inlet 28 for the e-cigarette, a battery 26 for providing operating power for the electronic cigarette, control circuitry 18 for controlling and monitoring the operation of the electronic cigarette, a first user input button 14 , a second user input button 16 , and a visual display 24 .
  • the outer housing 12 may be formed, for example, from a plastics or metallic material and in this example has a circular cross section generally conforming to the shape and size of the cartridge part 4 so as to provide a smooth transition between the two parts at the interface 6 .
  • the reusable part has a length of around 8 cm so the overall length of the e-cigarette when the cartridge part and reusable part are coupled together is around 12 cm.
  • the overall shape and scale of an electronic cigarette implementing an embodiment of the disclosure is not significant to the principles described herein.
  • the air inlet 28 connects to an air path 30 through the reusable part 2 .
  • the reusable part air path 30 in turn connects to the cartridge air path 52 across the interface 6 when the reusable part 2 and cartridge part 4 are connected together.
  • air is drawn in through the air inlet 28 , along the reusable part air path 30 , across the interface 6 , through the vapor generation region in the vicinity of the atomizer 48 (where vaporized e-liquid becomes entrained in the air flow), along the cartridge air path 52 , and out through the mouthpiece opening 50 for user inhalation.
  • the battery 26 in this example is rechargeable and may be of a conventional type, for example of the kind normally used in electronic cigarettes and other applications requiring provision of relatively high currents over relatively short periods.
  • the battery 26 may be recharged through a charging connector in the reusable part housing 12 , for example a USB connector.
  • the first and second user input buttons 14 , 16 in this example are conventional mechanical buttons, for example comprising a sprung mounted component which may be pressed by a user to establish an electrical contact.
  • the input buttons may be considered input devices for detecting user input and the specific manner in which the buttons are implemented is not significant.
  • other forms of mechanical button(s) or touch-sensitive button(s) e.g. based on capacitive or optical sensing techniques may be used in other implementations.
  • the specific manner in which the buttons are implemented may in particular be selected having regard to a desired aesthetic appearance.
  • buttons 14 , 16 may be structurally independent of one another, whereas in other cases the two buttons 14 , 16 may be to some extent integrated, for example with a single toggle element used to selectively activate one or other or both of the respective buttons.
  • the display 24 is provided to give a user with a visual indication of various characteristics associated with the electronic cigarette, for example current power setting information, remaining battery power, and so forth.
  • the display may be implemented in various ways.
  • the display 24 comprises a conventional pixilated LCD screen that may be driven to display the desired information in accordance with conventional techniques.
  • the display may comprise one or more discrete indicators, for example LEDs, that are arranged to display the desired information, for example through particular colors and/or flash sequences. More generally, the manner in which the display is provided and information is displayed to a user using the display is not significant to the principles described herein.
  • some embodiment may not include a visual display and may include other means for providing a user with information relating to operating characteristics of the electronic cigarette, for example using audio signaling, or may not include any means for providing a user with information relating to operating characteristics of the electronic cigarette.
  • the control circuitry 18 is suitably configured/programmed to control the operation of the electronic cigarette to provide functionality in accordance with embodiments of the disclosure as described further herein, as well as for providing conventional operating functions of the electronic cigarette in line with the established techniques for controlling such devices.
  • the control circuitry (processor circuitry) 18 may be considered to logically comprise various sub-units/circuitry elements associated with different aspects of the electronic cigarette's operation.
  • the control circuitry 18 comprises power supply control circuitry 22 for controlling the supply of power from the battery 26 to the vaporizer 48 in response to user input, user programming circuitry 20 for establishing configuration settings (e.g.
  • control circuitry 18 can be provided in various different ways, for example using one or more suitably programmed programmable computer(s) and/or one or more suitably configured application-specific integrated circuit(s)/circuitry/chip(s)/chipset(s) configured to provide the desired functionality.
  • the vapor provision system 1 comprises a first activation sensor for detecting user activation (i.e. pressing) of the first button 14 and a second activation sensor for detecting user activation (i.e. pressing) of the second button 16 .
  • the control circuitry 18 and more particularly the logical component of the control circuitry comprising the power supply control circuitry 22 , is configured to control a supply of power from the battery 26 to the heater/vaporizer 48 to generate vapor from a portion of the e-liquid in the cartridge part 4 for user inhalation via the mouthpiece outlet 50 in response to user activation of one or other (or both) of the activation sensors.
  • Each activation sensor is associated with an amount of power to supply to the vaporizer that is user-configured.
  • a user may program the control circuitry 18 , and more particularly the logical component of the control circuitry comprising the user programming circuitry 22 , to associate each activation sensor with a different user-defined power level setting.
  • a user may program the vapor provision system 1 so as to supply a relatively low amount of power to the vaporizer 48 when the user presses the first button 14 and to supply a relatively high amount of power to the vaporizer 48 when the user presses the second button 16 .
  • the vapor provision system 1 may further be configured to supply a third amount of power to the vaporizer 48 when the user presses the first button 14 and the second button simultaneously.
  • the third amount of power may also be user-defined and configurable by the user programming circuitry, thereby providing the user with the flexibility to define three separate performance/vapor generation levels that can be directly accessed by simply pressing the appropriate button(s).
  • the third amount of power may be predefined, for example it may correspond with the maximum power that can be provided by the battery, thereby providing the user with the flexibility to define two separate power levels that can be directly accessed by simply pressing the appropriate button as well as the ability to supply maximum power to the vaporizer by pressing both buttons together.
  • a user is provided with the ability to activate multiple different user-defined power levels.
  • the inventors have recognized this provides improved flexibility and convenience over existing schemes which rely on supplying fixed amounts of power or requiring a user to enter a programming menu to change the amount of power. For example, a user may wish to use a relatively high level of power for vapor generation at the beginning of a use session, but to use a lower level of power for vapor generation towards the end of a use session. This may be achieved in accordance with certain embodiments of the disclosure described herein by simply associating each of the desired power levels with one of the buttons, and then using the relevant button to activate vapor generation accordingly.
  • FIG. 2 is a flow diagram schematically representing a method of end-user programming of a vapor provision system to associate the desired user-defined power level settings with the respective activation sensors in accordance with certain embodiments of the disclosure.
  • the first button 14 and the second button 16 are used to provide user input for programming the vapor provision system.
  • other example implementations may have one or more additional user input devices, for example one or more additional button(s), for user input during programming.
  • a vapor provision system may instead, or additionally, be configured to connect (wired or wirelessly) to a separate device, for example a computer, such as a smartphone or tablet, running an application to allow the user to program the vapor provision system, and in particular to configure the user-defined power level settings to associate with the different activation sensors. More generally any approach may be provided to allow a user to established settings for the different activation means provided by a device to correspond with the user's desired levels of vapor generation for the different activation means
  • the vapor provision system is caused to enter a user programming mode.
  • This may be achieved, for example, by a user pressing the first and/or second buttons in a predefined sequence, e.g. pressing the first button six times within three seconds, or alternately pressing each button three times.
  • a user may enter the user programming mode whenever they want to change the power settings currently associated with the different activation sensors (which may be factory defaults if they have not previously been set).
  • the display may be configured to provide the user with an indication of this, as well as other information, such as current configuration settings.
  • the user when in the user programming mode, the user provides user input to indicate a desired power level setting to be associated with the first input button.
  • a desired power level setting in terms of indicating a specific number of watts, for example by using the first and second buttons to respectively increment and decrement a present power level setting indicated by the visual display 24 , for example in steps of 0.1 watts, or whichever resolution is provided in a given implementation.
  • the desired power level settings may be associated with arbitrary units, for example a user may be able to select from 10 different settings between zero power and maximum power.
  • a user may use the first and second input buttons to adjust the current power level setting on such a scale.
  • the user may confirm the desired power level setting for association with the first input button, for example by pressing one or other of the buttons in a predefined sequence, e.g. three quick presses of one or other button, or simultaneous press of both buttons, which is taken to in effect correspond to the user indicating “ok” or “enter”.
  • the user programming circuitry may, in response to user input, receive and store an indication of a second user-defined power level associated with the second input button, which may be done in the same way as for S 2 .
  • the user may exit the programming mode. Again, this may be achieved in any of a number of different ways, for example by pressing one or other of the user input buttons in a predefined sequence taken to correspond with an instruction to exit the user programming mode.
  • FIG. 2 shows one way in which a user may establish their desired power settings for association with the first and second input buttons. It will be appreciated this provides merely one of many different ways this can be achieved, for example having regard to the established practices for user programming of electronic devices, such as electronic cigarettes. It will also be appreciated the order in which the power levels are set is of course not significant. Furthermore, it will be appreciated the user programming mode may also be used to set any other configurable aspects of the vapor provision system that may be available for a given implementation.
  • the vapor provision system Having programmed the vapor provision system, and in particular having configured a first user-defined power setting for use in association with the first button 14 and a second user-defined power setting for use in association with the second button 16 , and having exited the programming mode, the vapor provision system is ready for normal use (i.e. selective vapor generation).
  • FIG. 3 is a flow diagram schematically representing a method of using the vapor provision system of FIG. 1 to selectively generate vapor in accordance with certain embodiments of the disclosure.
  • the vapor provision system 1 enters a standby state.
  • the vapor provision system 1 supports three basic operating states, namely an “off” state, an “on” state, and a “standby” state.
  • the electronic cigarette In the off state, the electronic cigarette is unable to generate vapor (i.e. the power supply control circuitry is prevented from supplying power to the vaporizer/heater in the off state).
  • the electronic cigarette may, for example, be placed in the off state between use sessions, for example when the electronic cigarette might be set aside or placed in a user's pocket or bag.
  • the on (or active) state the electronic cigarette is actively generating vapor (i.e. the power supply control circuitry is supplying power to the vaporizer/heater).
  • the electronic cigarette will thus typically be in the on state when a user is in the process of inhaling vapor from the electronic cigarette.
  • the electronic cigarette In the standby state the electronic cigarette is ready to generate vapor (i.e. ready to apply power to the vaporizer) in response to user input, but is not currently doing so.
  • the electronic cigarette will thus typically be in the standby state when a user initially exits the off state to begin a session of use, or between inhalations during an ongoing session of use.
  • T 1 represented in FIG. 3 the electronic cigarette enters the standby state by virtue of the user bringing the device out of the off state to begin a session of use.
  • 3 is the same for when the electronic cigarette enters the standby state from the on state because a user has finished inhaling on the electronic cigarette.
  • the manner in which the electronic cigarette is caused to switch from the off state to the standby state will be a matter of implementation and is not significant here.
  • the user may be required to press one of the input buttons in a particular sequence, for example multiple presses within a predetermined time, or to press both buttons together.
  • the power supply control circuitry detects user activation corresponding to a user pressing one or other of the first and second input buttons 14 , 16 .
  • the user will press whichever button corresponds with the power level setting they would currently like to use based on their previously-configured user-defined power level settings.
  • the power supply control circuitry supplies power to the vaporizer in accordance with the relevant power level setting. That is to say, if in T 2 the detected user activation corresponds with the user pressing the first user input button 14 , the power supply control circuitry supplies power to the vaporizer in accordance with the user-defined power level setting previously associated with the first button during the programming process represented in FIG. 2 . If, on the other hand, in T 2 the detected user activation corresponds with the user pressing the second user input button 16 , the power supply control circuitry supplies power to the vaporizer in accordance with the user-defined power level setting previously associated with the second button during the programming process represented in FIG. 2 .
  • the manner in which the power supply is controlled to correspond with the relevant power level setting will depend on the implementation at hand, and may be generally based on conventional techniques. Typically, it may be expected different power level settings will be associated with different fill-factors/duty cycles in a pulse- or frequency-width modulation scheme for supplying power to the vaporizer (in that sense it will be appreciated the supply of power to the vaporizer during vapor generation will typically change, e.g. by pulsing a drive current on and off, on a timescale that is typically faster than a cooling/heating time for the vaporizer and it is the average power level that is most relevant for practical purposes).
  • the power supply control circuitry may equally be configured to supply power at a constant voltage that is different for different power level settings. In general, the range of different power level settings that are available for the user to select from during programming and the manner in which the power supply control circuitry is configured to supply electric current to the vaporizer in correspondence with the different power level settings is not significant to the principles described herein.
  • the user setting need not specify a specific amount of power to deliver to the vaporizer, but may be based on a different parameterization.
  • an electronic cigarette may allow a user to select a desired temperature setting for vapor generation and the power supply circuitry for the electronic cigarette will be configured to supply power at a level which is appropriate for maintaining the desired temperature setting (i.e. the specific power supplied at different points during a puff will vary according to what is needed to maintain a temperature corresponding to the desired temperature level setting.
  • a user may associate a desired a user-defined temperature level setting with different activation sensors as opposed to a user-defined power level setting.
  • the phrase “power level setting” may nonetheless typically be used even when the setting does not in itself relates directly to an amount of power delivered to the heater. Rather, the phrase power level setting may be used more generally to refer to a setting that impacts a user-perceived level of vapor generation.
  • the power supply control circuitry detects the end of the user activation initiated in T 2 , which in this example corresponds with the user releasing the button they started pressing in T 2 . In response to this the power supply control circuitry operates to stop the supply of power to the vaporizer, thereby ending the current inhalation/puff event.
  • the power supply control circuitry may also be configured to stop supplying power to the vaporizer if certain other conditions are met. For example, the supply of power may be stopped if a predefined maximum time for vapor generation for a single activation event is reached or a fault condition is detected (e.g. overheating).
  • a user may be provided with vapor generated in accordance with their desired power setting for inhalation.
  • the user is able to select from multiple, in this case two but in other examples more, user-defined power settings on a puff-by-puff basis (and in principle within a single puff by switching buttons) without needing to reconfigure or reprogram the electronic cigarette to change between the two user-defined power settings.
  • This approach increases the flexibility and convenience of operation for users.
  • the electronic cigarette may further include an inhalation sensor, for example a pressure sensor, configured to detect when a user is actively inhaling on the electronic cigarette.
  • the power supply control circuitry may be configured to only supply power to the vaporizer in response to user activation of one or other of the user input buttons when the inhalation sensor detects the user is actively inhaling on the electronic cigarette.
  • the user may need to maintain pressure on the relevant input button to maintain the generation of vapor during their inhalation, or they may simply press the relevant button at the beginning, or before, inhaling to indicate the desired power level, which may then be supplied for so long as the user continues inhaling, regardless of whether the user continues pressing the relevant button during the inhalation event.
  • activation of one of the activation sensors associated with the different pre-stored user-defined power level settings may be considered to in effect correspond with detecting a user is pressing the relevant button in association with (i.e. at or around the same time as) inhaling on the electronic cigarette.
  • FIG. 4 is a cross-sectional view through an example vapor provision system 101 that represents a variation of the vapor provision system 1 represented in FIG. 1 in accordance with certain other embodiments of the disclosure.
  • Elements of the vapor provision system 101 represented in FIG. 4 which are functionally and/or structurally similar to, and will be understood from, corresponding elements of the vapor provision system 1 represented in FIG. 1 are identified with corresponding reference numerals and are not discussed again in detail in the interests of brevity.
  • the electronic cigarette 101 represented in FIG. 4 differs from the electronic cigarette 1 represented in FIG. 1 by the manner in which its activation sensors detect user activation events.
  • the activation sensors for the electronic cigarette 1 represented in FIG. 1 are based on two user input buttons
  • the activation sensors for the electronic cigarette 101 represented in FIG. 4 are based on a combination of one user input button 14 and an inhalation sensor 110 .
  • the electronic cigarette 101 in FIG. 4 again comprises two main components, namely a reusable part 102 and a replaceable/disposable cartridge part 4 .
  • the cartridge part for the electronic cigarette 101 represented in FIG. 4 may be identical to the cartridge part for the electronic cigarette 1 represented in FIG. 1 .
  • the reusable part 102 of the electronic cigarette represented in FIG. 4 differs from the reusable part 2 of the electronic cigarette represented in FIG. 1 in only having one user input button 14 and including an inhalation sensor 110 .
  • the inhalation sensor 110 is provided to allow the power supply control circuitry 22 to determine when a user inhales on the mouthpiece outlet 50 of the electronic cigarette 101 .
  • the inhalation sensor 110 may be based on any conventional inhalation sensing technique and will typically comprise a pressure sensor in a chamber in fluid communication with the air path 30 in the reusable part 102 .
  • a pressure sensor in a chamber in fluid communication with the air path 30 in the reusable part 102 .
  • a user of the electronic cigarette 101 represented in FIG. 4 may program first and second user-defined power levels to be associated with first and second activation sensors in broadly the same way as for the electronic cigarette 1 represented in FIG. 1 .
  • first activation sensor is based on detecting a user pressing on the first user input button 14
  • second activation sensor is based on detecting a user pressing on the second of user input button.
  • the example electronic cigarette 101 represented in FIG. 1 the first activation sensor is based on detecting a user pressing on the first user input button 14 and the second activation sensor is based on detecting a user pressing on the second of user input button.
  • the first activation sensor is based on detecting a user inhaling on the electronic cigarette using the inhalation sensor 110 and the second activation sensor is based on detecting a user pressing on the user input button 14 in conjunction with (i.e. at or around the same time as) inhaling on the electronic cigarette.
  • a first user-defined power setting level may be associated with a user inhaling on the device without pressing the button 14 while a second user-defined power setting level may be associated with a user inhaling on the device at the same time as pressing the button 14 .
  • the electronic cigarette 101 represented in FIG. 4 may operate generally in accordance with the procedure represented in FIG. 3 , except that in T 3 , the power supply control circuitry 22 is configured to supply power to the heater in accordance with the first user-defined power level setting when the user inhales on the electronic cigarette without pressing the button 14 , and to supply power to the heater in accordance with the second user-defined power level setting when the user inhales on the electronic cigarette in conjunction with pressing the button 14 .
  • a user may find it convenient to set the first power level to correspond to the lower of their two desired power level settings and to set the second power level to correspond to the higher of their two desired power level settings.
  • the use of the button 14 in conjunction with inhalation on the electronic cigarette may be considered to in effect provide a user-defined power boost in that pressing the button will increase the amount of power supplied to the vaporizer when the user inhales on the electronic cigarette from the lower of the user's desired power level setting to the higher of the user's desired power level settings.
  • the user may be required to maintain pressure on the input button to maintain the generation of vapor at the second power level setting during their inhalation, and if the user releases the button but continues inhaling, the power supplied to the vaporizer will change to the first power level setting.
  • the system may be configured to operate such that pressing the input button at or just before the beginning of inhalation causes the second power level setting to be used throughout the inhalation.
  • the power supply to the vaporizer is changed if the input button is pressed part way through an ongoing inhalation.
  • an electronic cigarette configured to operate in accordance with the principles described herein may be associated with approaches for user activation of different activation sensors.
  • an electronic cigarette may comprise an inhalation sensor and a single button similar to that shown in FIG. 4 , and may be configured such that its first activation sensor is triggered by a user pressing the button with a single press and its second activation sensor is triggered by a user pressing the button with multiple presses in a predetermined time, for example two presses within one second.
  • a user may thus indicate the user-defined power setting they wish to use based on whether they press the button once or twice, and then proceed to inhale on the device to trigger the supply of power to the vaporizer in accordance with their selected user-defined power level setting.
  • the different activation sensors may be associated with detecting that a user presses the button in one of a number of different predefined pressing sequences.
  • vaporizers based on other technologies, for example piezoelectric vibrator based vaporizers or optical heating vaporizers, and also devices based on other aerosol precursor materials, for example solid materials, such as plant derived materials, such as tobacco derivative materials, or other forms of vapor precursor materials, such as gel, paste or foam based vapor precursor materials.
  • a vapor provision system in accordance with some implementations may support three, four or more user-defined power settings with a corresponding number of user inputs/activation sensors.
  • the vapor provision system may also allow a user to configure other aspects of power deliver for association with each of a number of different user activation sensors. For example, rather than simply define a fixed power level setting to associate with a particular button (or other activation sensor), a vapor provision system according to certain embodiments may allow a user to define a time-varying profile of power supply throughout a puff.
  • puffs may be notionally divided into a series of segments, for example ten half-second segments (giving a maximum puff duration of five seconds), and a user may program a desired power level setting for each of the segments in a puff using a programming mode of the kind discussed above.
  • a user may thus program different time-varying power supply profiles for different activation sensors, so that, in normal use, the user may activate one button to deliver a first power supply profile during a puff, and another button to deliver a second, different, power supply profile during a puff.
  • one puff profile may comprise a high-power start (e.g. maximum power for the first two seconds) with a lower-power tail (e.g.
  • puff profile may comprise a steady power delivery (e.g. half power through a complete puff).
  • a user may thus, for example, use the first power profile by activating the first button to gain an initial impact at the beginning of a use session, and proceed to use the more steady power delivery profile for the remaining puffs in the use session (by activating the second button).
  • the user may define the various puff profiles to associate with the different activation sensors.
  • a user may be able to configure the time resolution for the different segments of the power delivery profile and/or a maximum duration of a puff profile (i.e. number of different segments), or these may be fixed.
  • the vapor provision system may be configured to learn a desired puff profile based on the profile of a user's inhalation during a programming session.
  • the vapor provision system might comprise an in-built puff response mode whereby the amount of power supplied at different points during a puff is responsive to the current strength of a user's inhalation (e.g. based on pressure measurements).
  • this in-built puff response mode may be used to map a user's inhalation profile during programming to a corresponding a power supply profile, and associate this with one of the activation sensors.
  • the corresponding power supply profile may be provided to the vaporizer.
  • This therefore provides a mechanism for providing a user with an easy mechanism for establishing a desired power delivery profile to associate with an individual button (or other activation means).
  • it can allow a user to provide a desired variation in power delivery throughout a puff, without the vapor provision system needing to continuously measure and moderate power delivery based on current airflow measurements.
  • a vapor provision system comprising: a first activation sensor for detecting a first user activation action; a second activation sensor for detecting a second user activation action; user programming circuitry configured, in response to user input, to store a first user-defined setting for use in association with the first activation sensor and a second user-defined setting for use in association with the second activation sensor; and power supply control circuitry configured to control a supply of power to a vaporizer to generate vapor from a vapor precursor material for user inhalation, wherein the power supply control circuitry is configured to control the supply of power to the vaporizer in accordance with the first user-defined setting in response to detecting user activation of the first activation sensor and to control the supply of power to the vaporizer in accordance with the second user-defined setting in response to detecting user activation of the second activation sensor.
  • the first and/or second user activation actions which are detected by the respective sensors may, for example, comprise a user pressing a specific button associated with the activation sensor or

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BR112019023874A2 (pt) 2020-06-02

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