Patent Description:
Vaporizer devices, which can also be referred to as vaporizers, electronic vaporizer devices or e-vaporizer devices, can be used for delivery of an aerosol (or "vapor") containing one or more active ingredients by inhalation of the aerosol by a user of the vaporizing device. For example, electronic cigarettes, which may also be referred to as e-cigarettes, are a class of vaporizer devices that are typically battery powered and that may be used to simulate the experience of cigarette smoking, but without burning of tobacco or other substances.

In use of a vaporizer device, the user inhales an aerosol, commonly called vapor, which may be generated by a heating element that vaporizes (which generally refers to causing a liquid or solid to at least partially transition to the gas phase) a vaporizable material, which may be liquid, a solution, a solid, a wax, or any other form as may be compatible with use of a specific vaporizer device. The vaporizable material used with a vaporizer can be provided within a cartridge (e.g., a part of the vaporizer that contains the vaporizable material in a reservoir) that includes a mouthpiece (e.g., for inhalation by a user).

To receive the inhalable aerosol generated by a vaporizer device, a user may, in certain examples, activate the vaporizer device by taking a puff, by pressing a button, or by some other approach. A puff, as the term is generally used (and also used herein), refers to inhalation by the user in a manner that causes a volume of air to be drawn into the vaporizer device such that the inhalable aerosol is generated by a combination of vaporized vaporizable material with the air.

A typical approach by which a vaporizer device generates an inhalable aerosol from a vaporizable material involves heating the vaporizable material in a vaporization chamber (or a heater chamber) to cause the vaporizable material to be converted to the gas (or vapor) phase. A vaporization chamber generally refers to an area or volume in the vaporizer device within which a heat source (e.g., conductive, convective, and/or radiative) causes heating of a vaporizable material to produce a mixture of air and vaporized vaporizable material to form a vapor for inhalation by a user of the vaporization device.

The term vaporizer device, as used herein consistent with the current subject matter, generally refers to portable, self-contained, devices that are convenient for personal use. Typically, such devices are controlled by one or more switches, buttons, touch sensitive devices, or other user input functionality or the like (which can be referred to generally as controls) on the vaporizer, although a number of devices that may wirelessly communicate with an external controller (e.g., a smartphone, a smart watch, other wearable electronic devices, etc.) have recently become available. Control, in this context, refers generally to an ability to influence one or more of a variety of operating parameters, which may include without limitation any of causing the heater to be turned on and/or off, adjusting a minimum and/or maximum temperature to which the heater is heated during operation, various games or other interactive features that a user might access on a device, and/or other operations.

Various vaporizable materials having a variety of contents and proportions of such contents can be contained in the cartridge. Some vaporizable materials, for example, may have a smaller percentage of active ingredients per total volume of vaporizable material, such as due to regulations requiring certain active ingredient percentages. As such, a user may need to vaporize a large amount of vaporizable material (e.g., compared to the overall volume of vaporizable material that can be stored in a cartridge) to achieve a desired effect.

<CIT> discloses a vaporizer device according to the preamble of claim <NUM>. <CIT> discloses a vaporizer device that includes a micro-pump for pumping liquid. Further, vaporizer devices are known from <CIT> and <CIT>.

The invention relates to a vaporizer device according to claim <NUM> and to a method according to claim <NUM>. The dependent claims relate to embodiments of the invention.

Aspects of the current subject matter relate to methods and system for dispensing a vaporizable material for vaporization. In one aspect, there is provided a vaporizer device that includes a vaporizer body. The vaporizer body includes a receptacle disposed at a proximal end of the body, a movable block, a controller, and a heating element. The receptacle is configured to receive a cartridge while the cartridge is coupled with the vaporizer body. The cartridge includes a reservoir holding a vaporizable material. The cartridge further includes a channel extending from the reservoir and having an opening at an end of the channel. The controller is configured to actuate the movable block. The actuating moves the movable block towards the channel to compress the channel. The compression of the channel ejects, from the opening at the end of the channel, at least a portion of the vaporizable material included in the reservoir. The heating element is configured to vaporize the vaporizable material ejected from the opening of the channel.

In some variations, one or more of the following features may optionally be included in any feasible combination. The channel may be positioned proximate to the movable block when the cartridge is coupled with the vaporizer body.

In some variations, the heating element may be positioned towards the opening of the channel when the cartridge is coupled with the vaporizer body.

In some variations, the cartridge may further include a flow restrictor positioned at an inlet of the channel. The flow restrictor may be configured to prevent the vaporizable material in the channel from flowing back into the reservoir.

According to the present invention, the vaporizer device further includes a pair of electrodes. The pair of electrodes are configured to detect at least the portion of the vaporizable being ejected from the opening of the channel. The heating element is activated to vaporize the vaporizable material in response to the pair of electrodes detecting at least the portion of the vaporizable material being ejected from the opening of the channel.

In some variations, the vaporizer body may further include a sensor configured to measure an intensity of an inhalation on a mouthpiece of the cartridge.

In some variations, the controller may be further configured to actuate the movable block based on the intensity of the inhalation.

In some variations, the vaporizer body may further include a piezo stack coupled to the movable block. The controller may actuate the movable block by at least actuating the piezo stack.

In some variations, the cartridge may further include a venting hole configured to reduce a negative pressure in a portion of the reservoir.

In some variations, the cartridge may further include a hydrophobic membrane configured to attract one or more bubble that form within the vaporizable material in the reservoir.

In some variations, the vaporizer body may further include a power source. The power source may include a battery configured to provide power to the heating element.

In some variations, the cartridge may further include a filter positioned at an inlet of the channel. The filter may be configured to prevent one or more air bubbles from entering the channel.

In some variations, the channel may be formed from a ceramic and/or a metal.

In some variations, the channel may be formed from a plastic material including at least one of a polyimide, a polyetheretherketone, a polypropylene, and a polyethylene terephthalate.

In some variations, an inner wall of the channel may be formed from a hydrophobic material and/or includes a hydrophobic coating.

In some variations, the heating element may be a thermistor fabricated on a diaphragm.

In some variations, the heating element may further include a substrate. The diaphragm may be bonded to the substrate to form a hermetic chamber.

In some variations, the heating element may be detachable from the vaporizer body.

In some variations, the heating element may include one or more electrical contact pads.

In some variations, the heating element may include a passivation layer disposed on a surface of the heating element. The passivation layer may be configured to isolate the heating element and the thermistor from the vaporizable material.

In some variations, one or more surfaces of the heating element may be roughened in a microscale and/or a nanoscale.

In some variations, the channel may be positioned between a non-movable block and the movable block when the cartridge is coupled with the vaporizer body.

In some variations, one or more surfaces of the heating element may be treated with a hydrophilic treatment and/or a hydrophilic coating.

In another aspect, a method for dispensing a vaporizable material for vaporization is provided. The method includes: detecting, at a vaporizer device, an inhalation at a mouthpiece of a cartridge coupled to the vaporizer device, the cartridge including a reservoir holding a vaporizable material, and the cartridge further including a channel extending from the reservoir and having an opening at an end of the channel; and in response to detecting the inhalation, activating, by a controller of the vaporizer device, a movable block of the vaporizer device, the activating of the movable block moving the movable block towards the channel to compress the channel, and the compression of the channel ejecting, from the opening at the end of the channel, at least a portion of the vaporizable material included in the reservoir, activating, by the controller of the vaporizer device, the heating element to vaporize the vaporizable material ejected from the opening of the channel, the vaporization of the vaporizable material generating an aerosol, and providing, via an air flow path, the aerosol to the user.

In some variations, one or more of the following features may optionally be included in any feasible combination. The controller may be configured to activate the movable block and/or the heating element in response to an intensity of the inhalation being above a threshold value.

In some variations, the movable block may be activated to move at a frequency determined based at least on an intensity of the inhalation.

In some variations, the controller may activate the movable block by at least actuating a piezo stack coupled with the movable block.

In some variations, the controller may activate the heating element by at least activating a power source coupled with the heating element to increase a temperature of the heating element.

According to the claimed invention, the method further includes detecting, by a pair of electrodes, at least the portion of the vaporizable being ejected from the opening of the channel.

In some variations, the controller may activate the heating element further in response to the pair of electrodes detecting at least the portion of the vaporizable being ejected from the opening of the channel.

Implementations of the current subject matter include devices relating to vaporizing of one or more materials for inhalation by a user. The term "vaporizer" is used generically in the following description to refer to a vaporizer device. Examples of vaporizers consistent with implementations of the current subject matter include electronic vaporizers, electronic cigarettes, e-cigarettes, or the like. Such vaporizers are generally portable, hand-held devices that heat a vaporizable material to provide an inhalable dose of the material.

The vaporizable material used with a vaporizer may optionally be provided within a cartridge (e.g., a part of the vaporizer that contains the vaporizable material in a reservoir or other container and that can be refillable when empty or disposable in favor of a new cartridge containing additional vaporizable material of a same or different type). A vaporizer may be a cartridge-using vaporizer, a cartridge-less vaporizer, or a multi-use vaporizer capable of use with or without a cartridge. For example, a multi-use vaporizer may include a heating chamber (e.g., an oven) configured to receive a vaporizable material directly in the heating chamber and also to receive a cartridge or other replaceable device having a reservoir, a volume, or the like for at least partially containing a usable amount of vaporizable material.

In various implementations, a vaporizer may be configured for use with liquid vaporizable material (e.g., a carrier solution in which an active and/or inactive ingredient(s) are suspended or held in solution or a neat liquid form of the vaporizable material itself) or a solid vaporizable material. A solid vaporizable material may include a plant material that emits some part of the plant material as the vaporizable material (e.g., such that some part of the plant material remains as waste after the vaporizable material is emitted for inhalation by a user) or optionally can be a solid form of the vaporizable material itself (e.g., a "wax") such that all of the solid material can eventually be vaporized for inhalation. A liquid vaporizable material can likewise be capable of being completely vaporized or can include some part of the liquid material that remains after all of the material suitable for inhalation has been consumed.

Referring to the block diagram of <FIG>, a vaporizer <NUM> typically includes a power source <NUM> (such as a battery which may be a rechargeable battery), and a controller <NUM> (e.g., a processor, circuitry, etc. capable of executing logic) for controlling delivery of heat to an atomizer <NUM> to cause a vaporizable material to be converted from a condensed form (e.g., a solid, a liquid, a solution, a suspension, a part of an at least partially unprocessed plant material, etc.) to the gas phase. The controller <NUM> may be part of one or more printed circuit boards (PCBs) consistent with certain implementations of the current subject matter.

After conversion of the vaporizable material to the gas phase, and depending on the type of vaporizer, the physical and chemical properties of the vaporizable material, and/or other factors, at least some of the gas-phase vaporizable material may condense to form particulate matter in at least a partial local equilibrium with the gas phase as part of an aerosol, which can form some or all of an inhalable dose provided by the vaporizer <NUM> for a given puff or draw on the vaporizer. It will be understood that the interplay between gas and condensed phases in an aerosol generated by a vaporizer can be complex and dynamic, as factors such as ambient temperature, relative humidity, chemistry, flow conditions in airflow paths (both inside the vaporizer and in the airways of a human or other animal), mixing of the gas-phase or aerosol-phase vaporizable material with other air streams, etc. may affect one or more physical parameters of an aerosol. In some vaporizers, and particularly for vaporizers for delivery of more volatile vaporizable materials, the inhalable dose may exist predominantly in the gas phase (i.e., formation of condensed phase particles may be very limited).

Vaporizers for use with liquid vaporizable materials (e.g., neat liquids, suspensions, solutions, mixtures, etc.) typically include an atomizer <NUM> having a heating element (not shown in <FIG>).

The heating element can be or include one or more of a conductive heater, a radiative heater, and a convective heater. One type of heating element is a resistive heating element, which can be constructed of or at least include a material (e.g., a metal or alloy, for example a nickel-chromium alloy, or a non-metallic resistor) configured to dissipate electrical power in the form of heat when electrical current is passed through one or more resistive segments of the heating element. In some implementations of the current subject matter, an atomizer can include a heating element. Other heating element, and/or atomizer assembly configurations are also possible, as discussed further below.

Certain vaporizers may also or alternatively be configured to create an inhalable dose of gas-phase and/or aerosol-phase vaporizable material via heating of a non-liquid vaporizable material, such as for example a solid-phase vaporizable material (e.g., a wax or the like) or plant material (e.g., tobacco leaves and/or parts of tobacco leaves) containing the vaporizable material. In such vaporizers, a resistive heating element may be part of or otherwise incorporated into or in thermal contact with the walls of an oven or other heating chamber into which the non-liquid vaporizable material is placed. Alternatively, a resistive heating element or elements may be used to heat air passing through or past the non-liquid vaporizable material to cause convective heating of the non-liquid vaporizable material. In still other examples, a resistive heating element or elements may be disposed in intimate contact with plant material such that direct conductive heating of the plant material occurs from within a mass of the plant material (e.g., as opposed to only by conduction inward form walls of an oven).

The heating element may be activated (e.g., a controller, which is optionally part of a vaporizer body as discussed below, may cause current to pass from the power source through a circuit including the resistive heating element, which is optionally part of a vaporizer cartridge as discussed below), in association with a user puffing (e.g., drawing, inhaling, etc.) on a mouthpiece <NUM> of the vaporizer to cause air to flow from an air inlet, along an airflow path that passes a heating element), optionally through one or more condensation areas or chambers, to an air outlet in the mouthpiece. Incoming air passing along the airflow path passes over, through, etc. the heating element, where gas phase vaporizable material is entrained into the air. As noted above, the entrained gas-phase vaporizable material may condense as it passes through the remainder of the airflow path such that an inhalable dose of the vaporizable material in an aerosol form can be delivered from the air outlet (e.g., in a mouthpiece <NUM> for inhalation by a user).

Activation of the heating element may be caused by automatic detection of the puff based on one or more of signals generated by one or more sensors <NUM>, such as for example a pressure sensor or sensors disposed to detect pressure along the airflow path relative to ambient pressure (or optionally to measure changes in absolute pressure), one or more motion sensors of the vaporizer, one or more flow sensors of the vaporizer, a capacitive lip sensor of the vaporizer; in response to detection of interaction of a user with one or more input devices <NUM> (e.g., buttons or other tactile control devices of the vaporizer <NUM>), receipt of signals from a computing device in communication with the vaporizer; and/or via other approaches for determining that a puff is occurring or imminent.

As alluded to in the previous paragraph, a vaporizer consistent with implementations of the current subject matter may be configured to connect (e.g., wirelessly or via a wired connection) to a computing device (or optionally two or more devices) in communication with the vaporizer. To this end, the controller <NUM> may include communication hardware <NUM>. The controller <NUM> may also include a memory <NUM>. A computing device can be a component of a vaporizer system that also includes the vaporizer <NUM>, and can include its own communication hardware, which can establish a wireless communication channel with the communication hardware <NUM> of the vaporizer <NUM>. For example, a computing device used as part of a vaporizer system may include a general purpose computing device (e.g., a smartphone, a tablet, a personal computer, some other portable device such as a smartwatch, or the like) that executes software to produce a user interface for enabling a user of the device to interact with a vaporizer. In other implementations of the current subject matter, such a device used as part of a vaporizer system can be a dedicated piece of hardware such as a remote control or other wireless or wired device having one or more physical or soft (e.g., configurable on a screen or other display device and selectable via user interaction with a touch-sensitive screen or some other input device like a mouse, pointer, trackball, cursor buttons, or the like) interface controls. The vaporizer can also include one or more output <NUM> features or devices for providing information to the user.

A computing device that is part of a vaporizer system as defined above can be used for any of one or more functions, such as controlling dosing (e.g., dose monitoring, dose setting, dose limiting, user tracking, etc.), controlling sessioning (e.g., session monitoring, session setting, session limiting, user tracking, etc.), controlling nicotine delivery (e.g., switching between nicotine and non-nicotine vaporizable material, adjusting an amount of nicotine delivered, etc.), obtaining locational information (e.g., location of other users, retailer/commercial venue locations, vaping locations, relative or absolute location of the vaporizer itself, etc.), vaporizer personalization (e.g., naming the vaporizer, locking/password protecting the vaporizer, adjusting one or more parental controls, associating the vaporizer with a user group, registering the vaporizer with a manufacturer or warranty maintenance organization, etc.), engaging in social activities (e.g., games, social media communications, interacting with one or more groups, etc.) with other users, or the like. The terms "sessioning", "session", "vaporizer session," or "vapor session," are used generically to refer to a period devoted to the use of the vaporizer. The period can include a time period, a number of doses, an amount of vaporizable material, and/or the like.

In the example in which a computing device provides signals related to activation of the resistive heating element, or in other examples of coupling of a computing device with a vaporizer for implementation of various control or other functions, the computing device executes one or more computer instructions sets to provide a user interface and underlying data handling. In one example, detection by the computing device of user interaction with one or more user interface elements can cause the computing device to signal the vaporizer <NUM> to activate the heating element, either to a full operating temperature for creation of an inhalable dose of vapor/aerosol. Other functions of the vaporizer may be controlled by interaction of a user with a user interface on a computing device in communication with the vaporizer.

The temperature of a resistive heating element of a vaporizer may depend on a number of factors, including an amount of electrical power delivered to the resistive heating element and/or a duty cycle at which the electrical power is delivered, conductive heat transfer to other parts of the electronic vaporizer and/or to the environment, latent heat losses, and convective heat losses due to airflow (e.g., air moving across the heating element or the atomizer as a whole when a user inhales on the electronic vaporizer). As noted above, to reliably activate the heating element or heat the heating element to a desired temperature, a vaporizer may, in some implementations of the current subject matter, make use of signals from a pressure sensor to determine when a user is inhaling. The pressure sensor can be positioned in the airflow path and/or can be connected (e.g., by a passageway or other path) to an airflow path connecting an inlet for air to enter the device and an outlet via which the user inhales the resulting vapor and/or aerosol such that the pressure sensor experiences pressure changes concurrently with air passing through the vaporizer device from the air inlet to the air outlet. In some implementations of the current subject matter, the heating element may be activated in association with a user's puff, for example by automatic detection of the puff, for example by the pressure sensor detecting a pressure change in the airflow path.

Typically, the pressure sensor (as well as any other sensors <NUM>) can be positioned on or coupled (e.g., electrically or electronically connected, either physically or via a wireless connection) to the controller <NUM> (e.g., a printed circuit board assembly or other type of circuit board). To take measurements accurately and maintain durability of the vaporizer, it can be beneficial to provide a resilient seal (not shown) to separate an airflow path from other parts of the vaporizer <NUM>. The seal, which can be a gasket, may be configured to at least partially surround the pressure sensor such that connections of the pressure sensor to internal circuitry of the vaporizer are separated from a part of the pressure sensor exposed to the airflow path. In an example of a cartridge-based vaporizer, the seal may also separate parts of one or more electrical connections between a vaporizer body <NUM> and a vaporizer cartridge <NUM>. Such arrangements of the seal in the vaporizer <NUM> can be helpful in mitigating against potentially disruptive impacts on vaporizer components resulting from interactions with environmental factors such as water in the vapor or liquid phases, other fluids such as the vaporizable material, etc. and/or to reduce escape of air from the designed airflow path in the vaporizer. Unwanted air, liquid or other fluid passing and/or contacting circuitry of the vaporizer can cause various unwanted effects, such as alter pressure readings, and/or can result in the buildup of unwanted material, such as moisture, the vaporizable material, etc. in parts of the vaporizer where they may result in poor pressure signal, degradation of the pressure sensor or other components, and/or a shorter life of the vaporizer. Leaks in the seal can also result in a user inhaling air that has passed over parts of the vaporizer device containing or constructed of materials that may not be desirable to be inhaled.

A vaporizer may include a vaporizer body <NUM> that includes a controller <NUM>, a power source <NUM> (e.g., battery), one more sensors <NUM>, an atomizer <NUM>, and a piezo stack <NUM> configured to control, via actuation as further described herein, a delivery rate of vaporizable material to the heating element. In some examples, vaporizer cartridge <NUM> includes a reservoir <NUM> for containing a liquid vaporizable material and a mouthpiece <NUM> for delivering an inhalable dose to a user. The vaporizer cartridge <NUM> can include a heating element (alternatively, the heating element can be part of the vaporizer body <NUM>). In implementations in which the heating element is part of the vaporizer body <NUM>, the vaporizer <NUM> can be configured to supply liquid vaporizable material from a reservoir <NUM> in the vaporizer cartridge <NUM> to the atomizer <NUM> part(s) included in the vaporizer body <NUM>.

Cartridge-based configurations for vaporizers that generate an inhalable dose of a non-liquid vaporizable material via heating of a non-liquid vaporizable material are also within the scope of the current subject matter. For example, a vaporizer cartridge may include a mass of a plant material that is processed and formed to have direct contact with parts of one or more resistive heating elements, and such a vaporizer cartridge may be configured to be coupled mechanically and electrically to a vaporizer body that includes a processor, a power source, one or more sensors, and/or the like.

In one example of an attachment structure for coupling a vaporizer cartridge <NUM> to a vaporizer body, the vaporizer body <NUM> includes a detent (e.g., a dimple, protrusion, etc.) protruding inwardly from an inner surface the vaporizer body <NUM>. One or more exterior surfaces of the vaporizer cartridge <NUM> can include corresponding recesses (not shown in <FIG>) that can fit and/or otherwise snap over such detents when an end of the vaporizer cartridge <NUM> inserted into the vaporizer body <NUM>. When the vaporizer cartridge <NUM> and the vaporizer body <NUM> are coupled, the detent into the vaporizer body <NUM> may fit within and/or otherwise be held within the recesses of the vaporizer cartridge <NUM> to hold the vaporizer cartridge <NUM> in place when assembled. Such a detent-recess assembly can provide enough support to hold the vaporizer cartridge <NUM> in place to ensure good contact between the vaporizer body <NUM> and vaporizer cartridge <NUM>, while allowing release of the vaporizer cartridge <NUM> from the vaporizer body <NUM> when a user pulls with reasonable force on the vaporizer cartridge <NUM> to disengage the vaporizer cartridge <NUM> from the vaporizer body <NUM>. While a detent and recess are described above, other attachment structures are possible for coupling the vaporizer cartridge <NUM> the vaporizer body <NUM>.

In some examples, the vaporizer cartridge <NUM>, or at least an end of the vaporizer cartridge <NUM> may be configured for insertion in at least a portion of the vaporizer body <NUM>. The vaporizer cartridge <NUM>, or at least an end of the vaporizer cartridge <NUM> may have a non-circular cross section transverse to the axis along which the vaporizer cartridge <NUM> is inserted into the vaporizer body <NUM>. For example, the non-circular cross section may be approximately rectangular, approximately elliptical (e.g., have an approximately oval shape), non-rectangular but with two sets of parallel or approximately parallel opposing sides (e.g., having a parallelogram-like shape), or other shapes having rotational symmetry of at least order two. In this context, approximately having a shape indicates that a basic likeness to the described shape is apparent, but that sides of the shape in question need not be completely linear and vertices need not be completely sharp. Rounding of both or either of edges or vertices of the cross-sectional shape is contemplated in the description of any non-circular cross section referred to herein.

<FIG> shows a top view of the combined vaporizer body <NUM> and cartridge <NUM>. <FIG> shows an example including many of the features generally shown in <FIG>. Other configurations, including some or all of the features described herein, are also within the scope of the current subject matter.

In cartridge-based implementations, it may be desirable to reduce complexity of the cartridge <NUM>, for example, by eliminating and/or consolidating one or more components of the cartridge <NUM> such as the heating element. In some aspects, vaporizable material may leak from the cartridge <NUM> when the cartridge <NUM> is coupled to the vaporizer body <NUM> and the vaporizer <NUM> is positioned in a variety of orientations including an upright orientation. Additionally, when heating the vaporizable material in the cartridge <NUM>, portions of the vaporizable material adjacent or proximate to the heating element may be unintentionally heated between puffs because the heating element may remain above a threshold temperature for a time period even when minimal or no electrical current is passing through the heating element. As such, subjecting the vaporizable material to unintentional heat may adulterate the vaporizable material and prevent the vaporizer device from delivering an aerosol having a desired flavor by merely measuring and/or controlling the amount of vaporizable material that is heated for delivery to the user. Embodiments described herein may include a more reliable and a higher efficiency heating element than other designs.

<FIG> illustrate example variations of the cartridge <NUM> and the vaporizer body <NUM> of the vaporizer <NUM> consistent with implementations of the current subj ect matter. As shown, the cartridge <NUM> may be configured to be a disposable and the vaporizer body <NUM> may be configured to be reusable. The cartridge <NUM> may be coupled to the vaporizer body <NUM> during normal operation (as shown as vaporizer <NUM> in <FIG>) and the cartridge <NUM> may be detached from the vaporizer body <NUM> by the user in order to replace the cartridge <NUM> with another cartridge <NUM>. <FIG> shows the cartridge <NUM> as including the reservoir <NUM>, a fluid channel <NUM>, an aerosol path <NUM>, and a mouthpiece <NUM>. A vaporizable material (e.g., E-liquid) may be stored in the reservoir <NUM> and may fill fluid channel <NUM> with e-liquid through capillary force and/or hydrostatic pressure. The fluid channel <NUM> may include an orifice <NUM> at its end (as shown in <FIG>).

As shown in <FIG>, the cartridge <NUM> may be coupled to the vaporizer body <NUM> when the vaporizer <NUM> is in use. The vaporizer body <NUM> may include the atomizer <NUM> configured to cause a vaporization of the vaporizable material (e.g., E-liquid) stored in the reservoir <NUM> of the cartridge <NUM> for subsequent inhalation by a user in a gas phase and/or a condensed phase (e.g., aerosol particles or droplets). In the example of the vaporizer body <NUM> shown in <FIG>, the atomizer <NUM> may include a heater <NUM>, an electrode pair <NUM>, a first non-movable block <NUM>, a movable block <NUM>, one or more piezo stacks <NUM>, and a second non-movable block <NUM>. The fluid channel <NUM> in the cartridge <NUM> may be positioned between the first non-movable block <NUM> and the movable block <NUM> with the orifice <NUM> facing towards the heater plate <NUM>.

The first non-movable block <NUM> may be configured to remain stationary whereas the movable block <NUM> may be configured to be mobile, for example, in one or more directions. Moreover, the movable block <NUM> may be coupled to the piezo stacks <NUM>. The piezo stacks <NUM> may be fixed to the second non-movable block <NUM> at one end and the movable block <NUM> at an opposite end. The piezo stacks <NUM> may be preloaded or non-preloaded. Activation of the piezo stack <NUM> may result in an upward force against the movable block <NUM> which may in turn compress (e.g., squeeze) the fluid channel <NUM> to cause an ejection of the vaporizable material from the fluid channel <NUM> via orifice <NUM> towards the heater plate <NUM> (e.g. via a path <NUM> shown in <FIG>). Meanwhile, activating the power source <NUM>, for example, a battery <NUM>, included in the reusable vaporizer body <NUM> may cause an increase in a temperature of the heater plate <NUM> such that the heater plate <NUM> is capable of heating the vaporizable material to a temperature sufficient to vaporize the vaporizable material.

<FIG> shows components of an example vaporizer body <NUM>. As shown in <FIG>, the reusable vaporizer body <NUM> may include the sensors <NUM>, which may include one or more sensors configured to detect whether one or more droplets of the vaporizable material have been ejected from the fluid channel <NUM>. For example, the reusable vaporizer body <NUM> may include a pair of electrodes <NUM>, which may be disposed at opposite sides of the path <NUM>. When one or more droplet of the vaporizable material are present between the electrode pair <NUM>, the capacitance between the electrodes pair <NUM> may change. Accordingly, the controller <NUM> may determine whether to the battery <NUM> to power the heater plate <NUM> based at least on the capacitance between the electrode pair <NUM>. For example, the controller <NUM> included in the reusable vaporizer body <NUM> may activate the battery <NUM> in response to the capacitance between the electrode pair <NUM> exceeding a threshold value indicative of the presence of droplets of vaporizable material between the electrode pair <NUM>. That is, the controller <NUM> may activate the battery <NUM> (e.g., to activate the heater plate <NUM>) when the capacitance between the electrode pair <NUM> indicates that one or more droplets of the vaporizable material have been successfully ejected from the fluid channel <NUM>. It should be appreciated that instead of the electrode pair <NUM>, the reusable vaporizer body <NUM> may include a different type of sensor capable of detecting the presence of droplets of the vaporizable material such as, for example, an LED emitter and detector.

Referring again to <FIG>, in some implementations of the current subject matter, the one or more sensors <NUM> may also include an inhalation sensor <NUM>. The inhalation sensor <NUM>, which may include a flow sensor, a pressure sensor, or a microphone, may be configured to measure an intensity of the user's inhalation (e.g., whether the user inhales strongly or lightly). When user inhales through the mouthpiece <NUM>, air may flow into the vaporizer <NUM> through an opening <NUM> and the intensity of the inhalation may be measured by the inhalation sensor <NUM>. The controller <NUM> may respond to the sensor <NUM> detecting an inhalation (e.g., an inhalation having an above threshold intensity) by at least actuating the piezo stacks <NUM> to eject vaporizable material onto the heater plate <NUM> and/or activating the battery <NUM> to power the heater plate <NUM> to cause a vaporization of the vaporizable material.

The delivery rate of the vaporizable material may be controlled by the displacement of the piezo stacks <NUM> and/or the actuation frequency of the piezo stacks <NUM>. Moreover, a droplet size of the vaporizable material exiting the channel <NUM> may also be adjusted based on the displacement of the piezo stacks <NUM> and/or the actuation frequency of the piezo stacks <NUM>. For example, the controller <NUM> may be configured to apply an electrical charge to the piezo stacks <NUM> to actuate the piezo stacks <NUM>, which may in turn move the movable block <NUM> to compress the channel <NUM> and the vaporizable material to be ejected from the channel <NUM> via the orifice <NUM>. The piezo stacks <NUM> may expand or contract when an electrical charge is applied. The delivery rate of the vaporizable material may be controlled by the frequency of electrical signal applied by the controller <NUM> to the piezo stacks <NUM>. In some aspects, the amount of power delivered to the heater <NUM> (e.g., an operating temperature of the heater <NUM>) may be adjusted to be proportional to the droplet size and/or the delivery rate of the vaporizable material. The increased control over droplet size and delivery rate may enable the controller <NUM> to predict the power requirements of the heater <NUM> and improve power efficiency and/or battery life for the vaporizer. Control over droplet size and delivery rate may also provide a user with a consistent flavor from puff to puff over the life of the cartridge <NUM>. The generated aerosol may travel with the air flow, passing through the aerosol path <NUM> and the mouth piece <NUM> for eventual inhalation by the user.

<FIG> illustrate example embodiments of the cartridge <NUM> consistent with implementations of the current subject matter. <FIG> shows an example of the cartridge <NUM> in which a vaporizable material <NUM> is held within the reservoir <NUM> and the channel <NUM>. The example of the cartridge <NUM> shown in <FIG> also includes a venting hole <NUM> at a superior portion of the reservoir <NUM>. The venting hole <NUM> may be configured to allow pressure inside the reservoir <NUM> to reach equilibrium with an ambient pressure around the cartridge <NUM>. The vaporizable material <NUM> may be configured such that a surface tension of the vaporizable material <NUM> may prevent the vaporizable material <NUM> from entering into and/or leaking through the venting hole <NUM>. It should be appreciated that while a specific location for the venting hole <NUM> is shown in <FIG>, other locations for the venting hole <NUM> are possible. For example, the venting hole <NUM> may be positioned at a lower portion of the reservoir <NUM> (e.g., closer to the channel <NUM>).

After the certain quantity of the vaporizable material <NUM> (e.g., e-liquid) of the reservoir <NUM> is ejected from the fluid channel <NUM>, air may enter into the reservoir <NUM> through the venting hole <NUM> and may travel upwards into the headspace of the reservoir <NUM> (e.g., void volume inside the reservoir <NUM> caused by the vaporizable material <NUM> being drawn from the reservoir <NUM>). Drawing portions of the vaporizable material <NUM> from the reservoir <NUM> may cause the pressure inside the reservoir <NUM> to decrease, for example, below the ambient pressure surrounding the reservoir <NUM>. In the absence of a pressure equalization mechanism such as the venting hole <NUM>, a vacuum may eventually develop within the reservoir <NUM> and inhibit the capillary action that draws the vaporizable material <NUM> into the fluid channel <NUM>. The lowered pressure (or vacuum) inside the reservoir <NUM> may therefore prevent further withdrawal of the vaporizable material <NUM> by at least preventing the vaporizable material <NUM> from entering the fluid channel <NUM> for subsequent ejection. Accordingly, in some implementations of the current subject matter, air is introduced into the reservoir <NUM> through the venting hole <NUM> in order to equalize the pressure inside the reservoir <NUM> with the ambient pressure surrounding the reservoir. Doing so may enable the vaporizable material <NUM> to enter the fluid channel <NUM> and facilitate further withdrawal of the vaporizable material <NUM> from the reservoir <NUM>.

<FIG> shows another example of the cartridge <NUM> including a flow restrictor <NUM> positioned at an inlet of the channel <NUM>. The flow restrictor <NUM> may be configured to facilitate the ejection of the vaporizable material <NUM> from the orifice <NUM>. For example, when the block <NUM> moves upward, the block <NUM> may create, inside the channel <NUM>, pressure squeezing the vaporizable material <NUM> inside the channel <NUM> to flow either out through the orifice <NUM> or back into the reservoir <NUM>. The flow restrictor <NUM> may provide resistance to prevent the vaporizable material <NUM> from flowing back to the reservoir <NUM>. As such, the flow restrictor <NUM> may encourage droplets of the vaporizable material <NUM> inside the channel <NUM> to flow out of the orifice <NUM> instead of back into the reservoir <NUM>.

<FIG> shows another example of the cartridge <NUM> including a membrane <NUM>. The membrane <NUM> may be formed from a hydrophobic material such as, for example, polytetrafluoroethylene (PTFE) and/or the like. Alternatively and/or additionally, the membrane <NUM> may be coated with a hydrophobic material such as a polytetrafluoroethylene (PTFE) and/or the like. As such, the membrane <NUM> may be configured to attract and burst a bubble <NUM> within the vaporizable material <NUM> in the reservoir <NUM>.

<FIG> shows another example of the cartridge <NUM>, which may include a filter <NUM> at an inlet to the channel <NUM>. The filter <NUM> may be configured to prevent bubbles (e.g., bubble <NUM>) from entering the channel <NUM>.

<FIG> illustrate an example embodiments of the channel <NUM> for the cartridge <NUM> consistent with implementations of the current subject matter. The channel <NUM> may be in a tube shape with the same cross section extended beyond its nozzle (e.g. orifice <NUM>).

<FIG> depicts an example of the channel <NUM> disposed between the first non-movable block <NUM> and the movable block <NUM>. In another embodiment, the tube channel <NUM> may contain an enlarged microfluidic chamber <NUM> in a middle region of the channel <NUM> where the movable block <NUM> may contact when the piezo stack <NUM> is activated. <FIG> is the top view of <FIG> depicts a flow restrictor <NUM> disposed at an entrance of the fluid chamber <NUM>. Flow restrictor <NUM> may facilitate the ejection of the droplets similar to the flow restrictor <NUM>.

<FIG> illustrates an example variation of a detachable heater plate <NUM> of the vaporizer body <NUM>, consistent with implementations of the current subject matter. As shown, the heater plate <NUM> may be detached from the vaporizer body <NUM> by a user and replaced with a new one. In some implementations, the heater plate <NUM> may be replaced at regular time intervals and/or after consuming a certain quantity of cartridges. In some aspects, the heater plate <NUM> may have the same or better shelf life compared to other components in the vaporizer body <NUM> so that one single heater plate <NUM> may be used throughout the shelf life of the vaporizer body <NUM>. However, in practice, the heater plate <NUM> may get contaminated, damaged, or broken and may require immediate replacement.

<FIG> illustrate examples implementations of the heater plate <NUM> consistent with implementations of the current subject matter. As shown in the example of <FIG>, the heater plate <NUM> may contain a heating element <NUM> and a thermistor <NUM> fabricated on a diaphragm <NUM>. The heater plate <NUM> may electrically connect to controller circuits (e.g., the controller <NUM>) and the battery <NUM> of the vaporizer <NUM> through contact pads <NUM>. The diaphragm <NUM> may be configured to reduce the thermal mass of the heater plate <NUM> and thus mitigate lateral thermal dissipation. It may also be possible to fabricate the heating element <NUM> on a substrate (e.g., a substrate <NUM> of <FIG>) instead of the diaphragm <NUM>. The substrate <NUM> and the diaphragm <NUM> may be formed from a low thermal conductivity material such as, for example, a low temperature co-fired ceramic (LTCC) substrate, a glass, and/or the like.

To even further reduce the thermal dissipation, the heater plate <NUM> may include a hermetic chamber <NUM> formed, for example, by bonding the diaphragm <NUM> with the substrate <NUM>. <FIG> depicts an example of the heater plate <NUM> including the hermetic chamber <NUM>. The chamber <NUM> may contain air or may be empty (e.g., a vacuum). A thin passivation layer <NUM> may be deposited on the heating element <NUM> and the thermistor <NUM> in order to isolate these components from the vaporizable material. <FIG> depicts an example of the heater plate <NUM> including the passivation layer <NUM>. It may also be possible to deposit a layer of high thermal conductive material on top of the heating element <NUM> as a thermal spreader. The high thermal conductive material, such as copper, aluminum, or the like, may increase the evaporation rate of the vaporizable material on the heater <NUM> as well as promote the wetting/spreading of the vaporizable material on the heater <NUM>. The surface of the heater plate <NUM> may include a microscale <NUM> and/or a nanoscale in order to roughen the surface of the heater plate <NUM>. <FIG> depicts an example of the heater plate <NUM> including microscale <NUM>. For hydrophilic treatment, the heating element <NUM> may include an intrinsically hydrophilic top layer (e.g., SiO<NUM>) or the top surface of the heating element <NUM> may be coated with hydrophilic coatings (e.g., silanes). A roughened and hydrophilic coating treated surface of the heating element <NUM> may increase the evaporation rate of the e-liquid on the heater <NUM> and may reduce the required operating temperature.

<FIG> depicts a flowchart illustrating an example of a process <NUM> for controlling an amount of vaporizable material delivered to a heating element, in accordance with some example embodiments. Referring to <FIG>, the process <NUM> may be performed by a vaporizer device such as, for example, the vaporizer <NUM>.

At block <NUM>, the sensors <NUM> at the vaporizer <NUM> may detect an inhalation at the mouthpiece <NUM> of the cartridge <NUM> coupled to the reusable vaporizer body <NUM> of the vaporizer <NUM>. For example, as noted, the vaporizer body <NUM> may include the inhalation sensor <NUM>, which may be configured to detect an inhalation at the mouthpiece <NUM> of the cartridge <NUM> including by measuring an intensity of the inhalation.

At block <NUM>, the controller <NUM> may activate, in response to the sensor <NUM> detecting the inhalation, the movable block <NUM> and the heater plate <NUM> such that the vaporizable material ejected from the cartridge <NUM> by the motion of the movable block <NUM> may be vaporized by the heater plate <NUM> to generate an aerosol. For example, in response to the inhalation sensor <NUM> detecting an inhalation (or an inhalation having an above-threshold intensity), the controller <NUM> may be configured to activate the battery <NUM> to deliver electrical power to the heater plate <NUM>. Moreover, the controller <NUM> may respond to detecting the inhalation by activating the piezo stacks <NUM> such that motion (e.g., expansion and/or contraction) of the piezo stacks <NUM> may move the movable block <NUM> to cause a compression of the fluid channel <NUM> disposed between the movable block <NUM> and the first non-movable block <NUM>. Compression of the fluid channel <NUM> may further cause one or more droplets of the vaporizable material to be ejected from the fluid channel <NUM> and travel, along the path <NUM>, to the heater plate <NUM>. The heater plate <NUM> may heat the droplets of the vaporizable material to a temperature that is sufficient to cause the vaporization of the vaporizable material ejected from the fluid channel <NUM> and generate an aerosol.

In some implementations of the current subject matter, the controller <NUM> may activate the movable block <NUM> and/or the heater plate <NUM> when the intensity of the inhalation measured by the inhalation sensor <NUM> exceeds a threshold value indicative of an intent to puff or inhale an amount of the vaporizable material. Moreover, the controller <NUM> may activate the heater plate <NUM> further in response to the electrode pair <NUM> (or a different type of sensor) detecting a successful ejection of one or more droplets of the vaporizable material from the fluid channel <NUM>.

At block <NUM>, at least a portion of the aerosol may be provided to a user. For example, at least a portion of the aerosol generated by the vaporization of the vaporizable material may be delivered to the user via the aerosol path <NUM>, which may traverse at least a portion of the mouthpiece <NUM> of the cartridge <NUM>.

Terminology used herein is for the purpose of describing particular embodiments and implementations only and is not intended to be limiting.

Spatially relative terms, such as "forward", "rearward", "under", "below", "lower", "over", "upper" and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures.

Although various illustrative embodiments are described above, any of a number of changes may be made to various embodiments without departing from the teachings herein. For example, the order in which various described method steps are performed may often be changed in altemative embodiments, and in other alternative embodiments, one or more method steps may be skipped altogether. Therefore, the foregoing description is provided primarily for exemplary purposes and should not be interpreted to limit the scope of the claims.

These computer programs, which can also be referred to programs, software, software applications, applications, components, or code, include machine instructions for a programmable processor, and can be implemented in a high-level procedural language, an object-oriented programming language, a functional programming language, a logical programming language, and/or in assembly/machine language. The machine-readable medium can alternatively or additionally store such machine instructions in a transient manner, such as for example, as would a processor cache or other random access memory associated with one or more physical processor cores.

Claim 1:
A vaporizer device (<NUM>), comprising:
a vaporizer body (<NUM>) including
a receptacle disposed at a proximal end of the body, the receptacle configured to receive a cartridge (<NUM>) while the cartridge (<NUM>) is coupled with the vaporizer body (<NUM>), the cartridge (<NUM>) including a reservoir (<NUM>) holding a vaporizable material (<NUM>), and the cartridge (<NUM>) further including a channel extending from the reservoir (<NUM>) and having an opening at an end of the channel,
a movable block (<NUM>),
a controller (<NUM>) configured to actuate the movable block (<NUM>), the actuating moving the movable block (<NUM>) towards the channel to compress the channel, and the compression of the channel ejecting, from the opening at the end of the channel, at least a portion of the vaporizable material (<NUM>) included in the reservoir (<NUM>), and
a heating element (<NUM>) configured to vaporize the vaporizable material (<NUM>) ejected from the opening of the channel,
characterized in that the vaporizer body (<NUM>) further comprises a pair of electrodes (<NUM>) configured to detect at least the portion of the vaporizable material (<NUM>) being ejected from the opening of the channel, and wherein the heating element (<NUM>) is configured to be activated to vaporize the vaporizable material (<NUM>) in response to the pair of electrodes (<NUM>) detecting at least the portion of the vaporizable material (<NUM>) being ejected from the opening of the channel.