Automotive air conditioners are generally composed of compressors, electronic clutches, condensers, evaporators, expansion valves, receiver dryers, pipes, condensing fans, vacuum solenoid valves, idlers and control systems. Automotive air conditioning is divided into high-pressure pipeline and low-pressure pipeline. The high-pressure side includes the compressor output side, high-pressure pipeline, condenser, receiver dryer and liquid pipeline; The low-pressure side includes evaporator, accumulator, return pipeline, compressor input side and compressor oil pool.

Compressor - as the name suggests, the compressor is used to compress the refrigerant, which is used to complete the transformation process from gas state to liquid state, so as to achieve the purpose of cooling and condensing the refrigerant. At the same time, in the whole air conditioning system, the compressor is also the pressure source of medium operation in the pipeline. Without it, the system not only does not cool, but also loses the power of operation.

Compressor is the heart of the air conditioning refrigeration system. It is a power source that makes the refrigerant circulate in the system.

Pipeline - since a certain pressure of refrigerant is to be injected, metal pipeline must be used. In particular, the section from compressor to condenser to refrigerant bottle to expansion valve has higher requirements for high pressure resistance than other pipelines because it belongs to the high-pressure section of the system.

Receiver drier is actually a device for storing refrigerant and absorbing refrigerant moisture and impurities. On the one hand, it is equivalent to the fuel tank of a car, replenishing refrigerant for the extra space of leaking refrigerant. On the other hand, it is like an air filter, filtering out impurities in the refrigerant. A certain amount of silica gel material is also installed in the receiver dryer to absorb water.

Condenser and evaporator -- although they are called differently, their structures are similar. They are all devices that cover a row of curved pipes with metal sheets for heat dissipation, so as to realize the heat exchange between the outside air and the substances in the pipes. Condensation of the condenser refers to the condensation of the refrigerant in its pipe from the gaseous state to the liquid state. Its principle is similar to that of the cooling water tank of the engine (the difference is that the water in the water tank is always liquid), so it is often installed in the front of the car, together with the water tank, to enjoy the cool wind from the front. In short, where the condenser is cool, so that it can dissipate heat and condense. The evaporator is just the opposite of the condenser. It is the place where the refrigerant changes from liquid to gas (that is, evaporation) to absorb heat.