Positive temperature coefficient (PTC) electric heater for electric automobile air-conditioning system

Abstract

The invention discloses a positive temperature coefficient (PTC) electric heater for an electric automobile air-conditioning system. The periphery of an electrode plate is provided with a silicon rubber fastened frame, wherein the inner space of the frame is equally divided by a silicon rubber strip and is isolated; a PTC heating chip is positioned in each isolated area; frames of two electrode plates are fastened; a plurality of groups of PTC heating plates and radiating fins are alternately arranged in the frame; the PTC heating plates and the radiating fins are electrically insulated through a heat-conducting silicon rubber protective film; a base plate is arranged inside the frame; a damping spring leaf is arranged between the frame and the base plate; a controller is positioned in the shell; a vent hole is formed on the shell; one end of a terminal board is electrically connected with the electrode plates on the PTC heating plates, the other end of the terminal board is connected with the controller through an electrode circuit board, and the terminal board is arranged on the frame; and one end of a plug connector penetrates through the shell so as to be connected with the controller, and the controller is used for controlling the power of the electric heater. The PTC electric heater disclosed by the invention has the characteristics of reliable mechanical structure, durable and environmentally-friendly materials, high temperature rise speed, high radiating capacity and safe and stable operation.

Description

technical field [0001] The invention belongs to an electric heater device, in particular to a PTC electric heater for an electric vehicle air-conditioning system. Background technique [0002] With the continuous improvement of society's energy-saving and environmental protection requirements, electric vehicles have become the development direction of modern automobile industry technology. Changes in the power system have led to the heating methods of traditional fuel-powered vehicles: including using engine waste heat and setting independent fuel heat sources, they will no longer be suitable for electric vehicles. Existing PTC electric heaters usually connect the PTC heating plate and heat dissipation fins by gluing, brazing, etc. The process is complicated, and toxic substances such as adhesives are used at the same time, which cannot meet environmental protection requirements, and the use of adhesives is not easy to disassemble. Repair. The invention aims to provide an ...

AI Technical Summary

Problems solved by technology

Changes in the power system have resulted in the heating methods of traditional fuel vehicles: including the use of engine waste heat and setting independent fuel heat sources, will no longer be suitable for electric vehicles

Existing PTC electric heaters usually connect the PTC heating plate and heat dissipation fins by gluing, brazing, etc. The process is complicated, and toxic substances such as adhesives are used at the same time, which cannot meet environmental protection requirements, and the use of adhesives is not easy to disassemble. rework

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