A method for controlling the temperature of a vaporizer for an inhaler, in particular an electronic cigarette product, comprising the steps of measuring the voltage applied to a heating element; measuring the current flowing through the heating element; determining the resistance of the heating element from the measured voltage and the measured current; controlling the temperature of the heating element by switching off the switching element in a controlled manner so that the current flow through the heating element is interrupted when the determined resistance exceeds or falls below a first critical threshold R_co.

An electronic cigarette includes a processor, a heating element, and a power supply. The heating element is electrically coupled to the processor. The power supply is electrically coupled to the processor and the heating element. The processor is configured to calculate a resistance value R.sub.L of the heating element before the heating element is powered on, determine whether the resistance value R.sub.L of the heating element is within a predetermined range, and determine whether a temperature control mode is selected when the resistance value R.sub.L of the heating element is within the predetermined range. The processor is configured to determine whether the heating element is adapted to the temperature control mode when the temperature control mode is selected, and control the heating element to work in the temperature control mode when the heating element is adapted to the temperature control mode. A related temperature control method is also provided.

The present invention relates in one aspect to an infusion fluid warmer which comprises a casing shell having an upper wall structure and a lower, opposing, wall structure. The casing shell encloses a fluid channel or passage extending through the casing shell in-between the upper and lower wall structures and fluid inlet and outlet ports coupled to opposite ends of the fluid channel or passage to allow a flow of infusion fluid through the casing shell. A housing shell is formed in a thermally conducting and electrically insulating material and a heating element is bonded to the housing shell and thermally coupled thereto. The fluid channel or passage extends through the housing shell or extends around the housing shell such that heat energy is transferred to the infusion fluid by direct physical contact with housing shell material.

A heater is provided that includes at least one resistive heating element having a material with a non-monotonic resistivity vs. temperature profile and exhibiting a negative dR/dT characteristic over a predetermined operating temperature range along the profile. The heater can include a plurality of circuits disposed in a fluid path to heat fluid flow.

Disclosed are a method for controlling the temperature of a heating apparatus in an electrically-heated smoking system and an electrically-heated smoking system, the method includes: providing a constant or variable preset temperature value; outputting a constant current to a heating apparatus by a constant current source; and controlling an actual temperature of the heating apparatus to be maintained at a preset temperature, wherein the temperature control step comprises: obtaining a voltage value corresponding to the constant current at the two ends of the electrical heating apparatus; deriving the actual temperature value of the heating apparatus according to the voltage value; comparing the actual temperature value of the heating apparatus with the preset temperature; and maintaining the actual temperature value of the heating apparatus at the preset temperature by adjusting a heating power supply.

A system for heating a selected section of a conductive ribbon comprises a non-conductive base and conducting pads. Further, the system comprises a variable voltage power supply electrically coupled to the conducting pads and a sensor. A processor is programmed to enable the variable power supply to produce a voltage signal across the conducting pads to cause the selected section, which includes a biological sample and is clamped to the non-conductive base via the conducting pads, to heat up. The processor receives, from the sensor, an electrical measurement. A correction for the voltage signal is computed based on the measurement to achieve a desired temperature, wherein the desired temperature is for processing the biological sample and the correction accounts for a variance in the selected section. The applied voltage signal is adjusted based upon the correction to regulate the selected section of at the desired temperature for a time.

In an embodiment an electro-thermal device includes a heater, a readout circuit, a digital controller having a first input coupled to a first output of the readout circuit and a digital sigma-delta modulator having a first input coupled to an output of the digital controller and an output coupled to the heater.

A cartridge for an aerosol-generating system is provided, including a liquid storage portion including a housing containing a liquid aerosol-forming substrate, the housing having an open end; and a heater assembly including: an electrical heating element configured to heat the substrate to form an aerosol, the heating element including a planar filament arrangement having one or more electrically conductive filaments, an electrically insulating substrate having a planar attachment face, the filament arrangement disposed on the planar attachment face, and connectors arranged at opposite ends of the heating element and forming two separate electrical contacts configured to apply power to the filament arrangement, at least a portion of the heater assembly is fluid-permeable, and the heater assembly is arranged over the open end of the housing.

An electronic smoking device, a heating method thereof and a computer storage medium are provided in the present disclosure. The electronic smoking device may at least include a heat generator. The heat generator may be configured to heat an aerosol generating substance. The heating method may include: obtaining a current electrical-characteristic value of the heat generator; determining a current temperature value of the heat generator based on the current electrical-characteristic value and a pre-acquired heat generator parameter; the heat generator parameter may represent a corresponding relation between the electrical-characteristic values and the temperature values of the heat generator; adjusting the current temperature value of the heat generator based on a current heating time, a current temperature value and the pre-acquired heating parameter. The heating parameter may represent a corresponding relation between heating time and the temperature values.

A device for determining a temperature of a resistance heating device, the device includes: a temperature sensor configured to detect the temperature of the resistance heating device; and an electronic data processing and/or control device configured to calculate a temperature change of the resistance heating device on a basis of a change in a resistance value of the resistance heating device and a relationship between the resistance value and the temperature of the resistance heating device, the electronic data processing and/or control device configured to validate the temperature of the resistance heating device detected by the temperature sensor, taking into account the calculated temperature change of the resistance heating device.