What is the working principle of car heater

The warm air water valve is the warm air switch of the automobile warm air heater. The working principle of automobile heater is that the radiator in the heater is connected with the circulating water of the engine through the inlet / outlet pipeline, and the water valve is a switch

Size of cooling water circulating cooling water circulation route: the thermostat can make the cooling water have three circulation routes: small circulation, large circulation and mixed circulation

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