#Air conditioner #Car air conditioner is not cool #Car air conditioner is not cool #Why is there only wind in the car air conditioner? @134 The operation principle of the car air conditioning system is a vapor or gas compression cooling system, where the compressor (COMPRESSOR) will suck the refrigerant from the evaporator (EVAPORATOR). The refrigerant is still in a gas state at that time and the compressor also compresses the refrigerant into the condenser (CONDENSER), causing the refrigerant to have a higher temperature and pressure. When the refrigerant flows through the condenser, the temperature will drop. Then the refrigerant will flow on to the receiver / dryer (RECEIVER / DRYER) to filter dirt and moisture contaminated in the refrigerant flowing to the expansion valve (EXPANSION VALVE) and injected as a mist into the evaporator, causing the refrigerant to have a low pressure and absorb heat from the outside to achieve a gas state, causing the outside temperature to decrease. After that, the refrigerant that is gas will be sucked into the compressor to start working again, repeating the cycle.