Apparatus and methods are described for use with a vaporizer that vaporizes at least one active ingredient of a material. In response to receiving a first input to the vaporizer, the material is heated, in a first heating step. An indication of the temperature of the material is detected, and, in response to detecting an indication that the temperature of the material is at a first temperature, the first heating step is terminated, by withholding causing further temperature increase of the material. The first temperature is less than 95 percent of the vaporization temperature of the active ingredient. Subsequently, a second input is received at the vaporizer. In response thereto, the material is heated to the vaporization temperature, in a second heating step. Other applications are also described.

A pump arrangement for powering a pump in providing a controlled volume of water to a drip nozzle in a drip-feed humidifier. The pump arrangement includes: a pump having a solenoid; a processing unit; and a power supply electrically connected to the solenoid via a switch which is controlled by the processing unit. The power supply is structured to supply power to the solenoid via the switch. The processing unit is programmed to modulate the power provided to the solenoid via the switch such that the power is supplied to the solenoid according to a mirror image power profile for each actuation of the solenoid for retracting the armature. The mirror image power profile includes: an initial portion which decreases at a third overall rate, an intermediate portion which decreases at a second overall rate different than the third overall rate, and a final portion which increases at a first overall rate.

To provide a control device for an aerosol inhalator capable of compensating changes in temperature of a heater due to inhalation. A control device for an aerosol inhalator includes a first sensor for obtaining a first value relating to a temperature of a load which atomizes an aerosol source stored in a reservoir or retained by an aerosol base using heat generated by supply of electric power, a second sensor configured to detect an inhalation, and a controller, wherein the controller is configured to determine, based on a second value based on the first value and a threshold, whether the aerosol source in the reservoir or the aerosol base is depleted or insufficient (850A), and correct at least one of the second value and the threshold when detecting the inhalation (840) and, in the determination, compare the second value and the threshold, at least one of the second value and the threshold being corrected (842).

Features relating to vaporizer devices configured to allow for user control of a vaporizer session are provided. Session size selection and temperature selection options allow for a user to select a desired session size and a desired temperature for the vaporizer session. A session control user interface is provided on a user device to allow for user selections and to provide for user viewing of a status of the vaporizer session.

A bowl for evaporation of a substance for inhalation comprises a cylindrical wall attached to a base. The bowl is made of a colorless single-crystal material selected from the group consisting of: alumina, magnesium-alumina spinel, yttrium-aluminum garnet, and cubic zirconium oxide. The bowl can have any desired color by doping the colorless single-crystal material by a transition metal. The transition metal is selected from a group consisting of: titanium, vanadium, chromium, iron and cobalt. The substance for evaporation can be positioned inside the bowl. In one embodiment, the bowl comprises a tapered cylindrical wall attached to a base. The tapered cylindrical wall can preferably be in shape of a truncated cone to which the base is attached.

Vaporizer cartridges and vaporizer apparatuses, and methods for making, using and delivering vapor to a user, that are leak-resistant for use with cannabinoids. In particular, described herein are leak-resistant vaporizer cartridges and apparatuses adapted for use with oil-based vaporizable materials including cannabis oils.

A vaporization assembly includes: a vaporization base having a mounting cavity and an air outlet; a vaporization core arranged in the mounting cavity and cooperating with the vaporization base to define and form a vaporization cavity; a first airflow channel arranged in the vaporization base in a first direction, an air inlet end of the first airflow channel being in communication with the vaporization cavity; and a second airflow channel arranged in the vaporization base in a second direction intersecting with the first direction, an air outlet end of the second airflow channel being in communication with the air outlet, an air inlet end of the second airflow channel being in communication with an air outlet end of the first airflow channel. A corner between the air inlet end of the second airflow channel and the air outlet end of the first airflow channel is a smooth transition corner.

An aerosol delivery device is provided that includes power-source terminals to connect a power source to the aerosol delivery device, and a heating element to vaporize components of the aerosol precursor composition. The device includes a micro pump to deliver aerosol precursor composition from the reservoir to the heating element, and a driver circuit to drive the micro pump. The driver circuit includes a boost converter to step up voltage from the power source to the micro pump to thereby power the micro pump. And the device includes a control component with processing circuitry to control the driver circuit to switchably drive the micro pump to deliver the aerosol precursor composition to the heating element. The processing circuitry is also to switchably connect the power source to the heating element independent of the boost converter and thereby power the heating element to vaporize components of the aerosol precursor composition.

A main unit connected to a vaporizer and controlling operation of the vaporizer includes: a processor; and a battery, a timer, and a memory that are connected to the processor. The processor controls the battery to provide energy for the vaporizer to allow the vaporizer to vaporize an aerosol-generating substrate. The processor calculates an accumulative temperature during vaporization of the vaporizer based on timing information of the timer and a vaporization temperature change curve stored in the memory.

The present invention provides a method and apparatus for reducing condensation in a respiratory circuit during a delivery of humidifying agent into the respiratory circuit. A first amount of humidification agent to a first volume of gas is delivered to a patient respiratory circuit during a patient inhalation cycle or immediately after a patient exhalation cycle, and the humidification agent or the first volume of gas is heated. Condensation is removed from the respiratory circuit at least in part by providing, during a patient exhalation cycle or immediately after a patient inhalation cycle, a second amount of the humidification agent to a second volume of gas being delivered from the gas source to the patient respiratory circuit, the second amount of the humidification agent being significantly less than the first amount of the humidification agent.