When the engine is working, the coolant heated by the engine cylinder burning at high temperature enters the heat exchanger through the inlet pipe under the action of the engine cooling system water pump, and the heat emitted by the coolant is sent to the carriage or the windshield glass through the air blown by the blower to improve the temperature and defrost in the carriage.
The heat source comes from the engine coolant. The water heating system is mostly used in cars, large trucks and passenger cars with low heating requirements. The water heating system is mainly composed of heater, hot water regulator, blower, control panel and so on.