Methods and vaporizer apparatuses that estimate, measure and/or predict the amount of vapor and/or material (including active ingredients) released by the vaporizer apparatus. In particular, described herein are electronic vaporizers and methods of using them that determine a dose/amount of vapor and/or a material in the vapor based primarily or exclusively on the electrical and thermal properties, e.g., power or energy applied to the vaporizing element (e.g., heating coil) and the temperature of the material immediately before and as it is vaporized. Dose information may be used to control operation of the device and/or reported to the user.

An aerosol generating system includes a heater assembly and a manually operated pump. The pump includes a hollow member with an inlet portion and an outlet portion. The inlet portion of the hollow member is configured connectable with a liquid storage portion. The outlet portion of the hollow member is in fluid communication with a dispensing assembly. The pump is configured to dispense a liquid material onto the heater assembly. The pump is configured to pump the liquid material from the liquid storage portion via the dispensing assembly and onto the heater assembly.

An aerosol generating device for generating aerosol from an aerosol generating material is disclosed. The aerosol generating device includes a first heating unit and a second heating unit both arranged to heat, but not burn, an aerosol generating material in use. A controller is arranged to control the first and second heating units wherein during the course of a session the controller is arranged to set the first heating unit: (i) a target operating temperature T1 during a time period t1-t2; (ii) a target operating temperature T2 during a time period t2-t3; (iii) a target operating temperature T3 during a time period t3-t6; and (iv) a target operating temperature T4 during a time period t6-t7; wherein temperature T1>T2>T3>T4 and time t0<t1<t2<t3<t4<t5<t6<t7.

Provides heating pump cover and heating pump, heating pump cover comprises: cover body, comprising flange plate and sealing piece, sealing piece is outside and integrally connected with flange plate, with cross-section stepped, flange plate comprises first surface and second surface arranged oppositely, first surface is for contacting with liquid, temperature control assembly, arranged on second surface, heating body, arranged on one side of first surface, and end of heating body penetrates flange plate, sealing and connecting flange plate, connecting to temperature control assembly by electric circuit. Arranging sealing piece on outer side of flange plate on cover body, with cross-section stepped, after being installed onto pump body, achieving multi-level snapping and sealing, effectively avoiding situation of liquid leakage happen at connecting portion between cover body and pump body due to aging or not tightly sealing, improving sealing performance and reliability of cover body installation.

Disclosed are a heating pump cover and a heating pump. The heating pump cover comprises a cover body, a temperature control device, a raised part, and a heating body. The cover body has a first surface configured to be in contact with liquid on which the heating body is arranged and a second surface opposite to the first surface on which the temperature control device and the raised part are arranged. The raised part forms grooves on the first surface and the temperature control device is arranged on the raised part. The part of the heating body locates in the grooves has a first region which is in contact with the inner wall of the groove and a second region which is arranged interval with the inner wall of the groove.

A metal heater system. More specifically, a plurality of metal heaters is coupled to the surface of the lower end of a pipeline at predetermined intervals in the longitudinal direction of the pipeline, and PTC heating elements inside the metal heaters conduct heat to local portions of the pipeline. Convection is generated in a fluid inside the pipeline because of the heat conducted to the local portions, and thus the overall pipeline is maintained at a constant temperature, efficiently preventing the freezing and bursting of the pipeline in winter.

An aerosol generating device is disclosed comprising a heater for generating an aerosol and a vapour flow passage configured to transport the generated aerosol from the heater to a mouth end of the vapour flow passage. The vapour flow passage is extendable such that a length between the heater and the mouth end is adjustable.

A liquid heater is described including a chamber for receiving a liquid, a pair of electrodes located within the chamber for applying electric current to the liquid, input terminals for connection to a power supply, a plurality of bi-directional switches for connecting the electrodes to the input terminals, and a control unit for controlling the switches. The power supply supplies an alternating voltage having a frequency no greater than 60 Hz, and the control unit controls the switches such that the electrodes are energised with an alternating voltage having a frequency no less than 150 kHz.

Methods and apparatus for a vaporizer device according to various aspects of the subject technology may include an atomizer and a control circuit. The atomizer may include a plurality of chambers including a first chamber and a second chamber. The atomizer may also include a plurality of heating elements including a first heating element and a second heating element. The first heating element may be configured to apply heat to the first chamber in response to being enabled, and the second heating element may be configured to apply heat to the second chamber in response to being enabled. The control circuit may be configured to sequentially enable the plurality of heating elements.

A self-regulating heater may comprise a first substrate including a first silicone layer and a first polyimide layer. A positive temperature coefficient heating element may be formed over the first polyimide layer. A second substrate may be located over the positive temperature coefficient heating element. The second substrate may include a second silicone layer and a second polyimide layer.