Electronic thermostat

Abstract

The present invention relates to an electronic thermostat capable of preventing the malfunction of a valve by preventing foreign substances from accumulating in a guide cap when operating the valve byusing an expansion pressure of a thermally expandable material as a heater generates heat. An electronic thermostat for controlling the flow rate of cooling water by a piston reciprocating accordingto the expansion and contraction of a thermally expandable material comprises: a case having a space for accommodating the thermally expandable material; a heater, inserted into the thermal expansionmaterial filled in the space, for generating heat by receiving external power; a guide, provided under the case, for supporting a pressure when the thermally expandable material expands; a piston installed so as to be moveable up and down along the inner circumferential surface of the guide; a sealing member, installed at a lower end of the case, for sealing the thermally expandable material; a guide cap installed so as to be moveable up and down along the outer circumferential surface of the guide on a flow path of the cooling water by a pressing force of the piston; and a valve, coupled to the guide cap, for opening and closing the flow path, wherein the guide cap has a discharge hole at a lower end thereof.

Description

technical field [0001] The present invention relates to an electronic thermostat, and more specifically relates to an electronic thermostat capable of preventing malfunction of the valve by preventing foreign matter from accumulating inside the guide cap when the valve is operated by the expansion pressure of the heat-expandable substance as the heater generates heat. device. Background technique [0002] Usually, a thermostat for an automobile is installed between the engine and the radiator, and has a valve that automatically opens and closes according to the temperature change of the cooling water. The role of appropriate temperature. That is, the thermostat can control the temperature of the engine by adjusting the cooling water flow rate that changes according to the opening and closing displacement of the valve. [0003] In addition, a vehicle thermostat is based on a mechanical thermostat having a structure in which the expansion force of a thermally expandable subs...

AI Technical Summary

Problems solved by technology

[0006] However, as the above-mentioned conventional electronic thermostat is used for a long period of time, foreign matter existing in the cooling system of the automobile engine is present in the cooling water adjustment device (WTCA; Water Temperature Control Assembly) when the engine is stopped, and the Gradually accumulate inside the guide cap, which is a structure that rises and falls in response to the rise and fall of the thermostat piston, and there is a problem that the valve is always in the open state, causing the valve to malfunction.

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