Electric heater, shell of electric heater, and electric vehicle

Abstract

The invention provides a shell of an electric heater. The shell comprises a heating chamber, a circulating chamber, an inlet, an outlet, a first shell and a second shell. The heating chamber is used for accommodating PTC electric heating elements. The circulating chamber is used for accommodating medium and admitting flowing and passage of the medium. The second shell comprises connecting walls and partition walls. The heating chamber comprises a plurality of heat transfer channels partitioned by the partition walls. The circulating chamber comprises a plurality of circulating units. The first shell comprises a first side wall and a second side wall. The heat transfer channels with the first side wall or the second side wall form passages respectively. The circulating units are communicated with the passages. The circulating units of the shell of the electric heater are communicated through the passages to form the circulating chamber with a curved path; the medium flows through the circulating chamber in a circulating manner; flow path is long; the medium flows around the heat transfer channels; contact time is long, contact area is large, and heat absorption is highly efficient; accordingly, the heat efficiency of the electric heater with the shell is improved effectively, and the electric heater can be well used for heat supply, defrosting and demisting in electric vehicles.

Description

technical field [0001] The invention belongs 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, there is not enough waste heat for heating the interior of the car during operation. In addition, in the extremely cold environment in winter, the car needs to be defrosted before starting. And defogging also requires a heat source, so it is necessary to...

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem that the arrangement form of the shell of the existing electric heating device makes the circulation path of the medium in the circulation chamber short, and the time for absorbing the heat of the PTC electric heating element is also short, and the medium cannot absorb heat well, resulting in failure of the electric heating device. Technical problem with low thermal efficiency

Images