Now cars mainly make full use of the waste heat of the coolant after the engine is cooled for heating, which is usually called water cooling. When the requirements for heating effect are higher, it will generally assist the relevant PTC heater for heating...

Automobile air conditioning and refrigeration system includes air conditioning compressor, condenser, liquid storage tank (now cars are basically integrated with condenser), evaporator, air conditioning pipeline, expansion valve, etc...

The excavator air conditioner is the same as the refrigeration principle of the household air conditioner that we are familiar with....