Seek the working principle of an air conditioner, preferably with pictures, thank you in advance.

The working principle of air conditioning is actually very simple. The principle of split air conditioning is similar to that of central air conditioning, which is mainly divided into refrigeration principle and heating principle.

Refrigeration principle:

When the central air conditioner is used for refrigeration, the air conditioning system has a built-in heat-absorbing medium-refrigerant. The refrigerant is throttled by the expansion valve and evaporated and gasified in the indoor unit (evaporator). The fan of the indoor unit blows cold air into the room to absorb the heat energy in the indoor air. The refrigerant returns to the suction end of the compressor through the pipeline, and the temperature of the refrigerant is increased through the compression of the compressor. The refrigerant is transformed from a vaporized state to a liquefied state through the outdoor unit (condenser), and a large amount of refrigerant is released during the transformation.

Heating principle:

When the central air conditioner is heating, the system directly enters the high-temperature and high-pressure liquid compressed by the compressor into the condenser of the indoor unit (the indoor unit changes from refrigeration to heating, and the function changes from evaporator to condenser) through the conversion of the electric four-way valve, and releases a lot of heat to the room through the fan to absorb the cold air in the room; System refrigerant is throttled by expansion valve, and then converted from liquid to gas by outdoor evaporator. The cold air sucked by the indoor unit is discharged to the outside through the outdoor evaporator and fan, and the refrigerant returns to the suction end of the compressor through the pipeline. Through repeated circulation, the purpose of heating is achieved.