The invention relates to a heating device (1) for an air-conditioning housing, said heating device (1) comprising a heating body (2) supplied with current for heating an air flow passing through said heating body (2), said heating body (2) comprising heating elements through which said current passes and which are arranged in electrically insulated tubes (4) of the heating elements, said heating elements being controlled via a distribution unit (3), said heating device (1) comprising means for earthing a plurality of metal elements distributed in the heating body (2) and the distribution unit (3). Said heating device (1) is characterised in that said earthing means consist of a single earthing circuit which passes through the heating body (2) and the distribution unit (3) and is formed by arranging said metal elements in series with direct contact between said metal elements.

An imaging device according to the present disclosure includes a housing, a lens unit, a heater, an imaging unit, a temperature sensor, and a heater control unit. The lens unit is attached to the housing. The heater is provided in the lens unit. The imaging unit, the temperature sensor, and the heater control unit are housed in the housing. The imaging unit outputs an optical image formed by a light flux transmitted through the lens unit as an image signal. The heater control unit controls the heater in accordance with a temperature detection value by the temperature sensor.

The invention relates to a fluid container for a motor vehicle, having a container wall that bounds a storage volume for storing liquid with respect to an environment, a heating element that is arranged in the storage volume, and a housing, wherein the housing encloses the heating element in a liquid-tight manner with respect to the supply volume.

An electric heater for heating a liquid or frozen substance in a motor vehicle. In particular, an electric heater for heating electric car batteries or an HVAC system or for a system for reducing the environmental pollution of the motor vehicle. The electric heater includes a metal sheet adapted to generate heat when it is crossed by an electric current. two polymeric layers between which the metal sheet is arranged, and two metal layers, between which the two polymeric layers are arranged. The two metal layers are hermetically sealed to each other defining a casing, which prevents the substance to be heated from coming into contact with the two polymeric layers and with the metal sheet. A plurality of metal flaps extend transversely from an external face of at least one metal layer of the two metal layers.

An electric heater for heating a substance, in particular for a tank for a system for reducing the environmental pollution of a motor vehicle; the electric heater comprising a metal sheet adapted to generate heat when it is crossed by an electric current; two polymeric layers between which the metal sheet is arranged; at least one PTC layer, having a positive temperature coefficient, which at least partially coats the metal sheet; wherein the two polymeric layers are hermetically sealed to each other, defining a casing which prevents the substance to be heated from coming into contact with the metal sheet; wherein said at least one PTC layer has a thickness from 5 to 50 μm; wherein said metal sheet is in contact, in particular directly in contact, with both the polymeric layers.

The present invention relates to a method and device for measuring the temperature in power resistors based on the measurement of the high-frequency circuit parameters of said resistor. The present invention excludes the use of thermocouples, dedicated temperature sensors or thermo chambers.

A method for establishing and/or maintaining a desired temperature of a material in an intermediate bulk container including the steps of positioning a heating element in at least partial contact with a material container containing the material within the intermediate bulk container; and applying an electrical power source to the heating element, wherein the heating element is at least partially made of a positive temperature coefficient resistant material, the heat from the heating element being largely transferred to the material in the material container.

A rotatable wax-melting fragrance lamp comprises a base, a housing, a rotating component, a heating component, a light-emitting component, a control PCB, and a heat-conducting plate. By arranging the rotating component, the whole product can present a rotating effect, which can make the lamp have better lighting effect and decorative effect, and enables the heating component to melt and volatilize wax more uniformly; the heat-conducting plate is detachable, which is convenient for cleaning and replacing the fragrant wax; the PTC heating element or ceramic heating resistor is used in place of open fire heater. The heating of the PTC heating element or the ceramic heating resistor is to realize the heating of the fragrant wax, so that the fragrant wax produces a pleasant fragrance, which spreads around the immediate vicinity. The PTC heating element or ceramic heating resistor requires lower heating power consumption, while the power control is very sensitive.

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.

A positive temperature coefficient component includes: a substrate (32); a conductive ink (36) disposed over at least a portion of the substrate (32); a positive temperature coefficient layer (38) disposed over at least a portion of the substrate (32) and/or the conductive ink (36); and a topcoat layer (42) formed from a coating composition including a dielectric material disposed over at least a portion of the positive temperature coefficient layer (38) and/or the conductive ink (36).