Electric heating device and electric vehicle

Abstract

The invention provides an electric heating device, which includes a housing and several PTC electric heating elements. The housing is formed with several heat conduction grooves and a circulation chamber for containing and circulating the medium. The circulation chamber is sealed and arranged relative to the heat conduction grooves. ; Wherein, the PTC electric heating element includes a PTC heating assembly, the first and second electrode assemblies arranged on both sides of the PTC heating assembly, and the insulating layer arranged on the outside of the first and second electrode assemblies; the first and second electrode assemblies include The fixed electrode, the fixed electrode of the first electrode assembly and / or the second electrode assembly is a trapezoidal electrode, the inner side of the trapezoidal electrode facing the PTC heating component is a vertical surface, and the outer side facing the insulating layer is a slope; the heat conduction groove is a trapezoidal groove, At least one side thereof is an inclined plane, and the PTC electric heating element is installed in the trapezoidal groove and matched with the trapezoidal groove. The invention also relates to an electric vehicle using the electric heating device. The heat generated by the PTC electric heating element of the electric heating device of the present invention can be directly transferred to the medium in the circulation cavity through the heat conduction groove, and the heat loss is small.

Description

technical field [0001] The invention relates to the field of heating devices, in particular to an electric heating device for electric vehicles. Background technique [0002] The air-conditioning and heating system of traditional fuel vehicles usually uses the waste heat of exhaust gas or the waste heat of engine cooling circulating water as a heat source and introduces it into a heat exchanger. The air sent by the blower is exchanged with the heat exchanger, and the heated air is sent into the car to achieve The purpose of heating, defogging, defrosting and heating other components that require a heat source. However, with the application of pure electric vehicles and hybrid vehicles, especially for pure electric vehicles, the electric vehicle does not have an engine, and there is not enough waste heat for the internal heating of the car when it is working. In addition, in the extremely cold environment in winter, it is impossible to Provide the heat required for heating, ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the PTC electric heating element of the existing electric heating device presses the electric heating element on the opposite side part of the recess through the pressure element also arranged in the concave part, setting the pressure element will affect the heat transfer effect of the PTC electric heating element, The technical problem that the medium cannot absorb heat well, resulting in low thermal efficiency of the electric heating device

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