Components of a car air conditioner

Modern air conditioning systems consist of refrigeration systems, heating systems, ventilation and air purification devices and control systems.

1. Ventilation system: Its function is to ensure indoor ventilation when the car is running, that is, to continuously rush fresh air into the car interior to drive out dust, carbon dioxide and harmful gases from the engine. In the cold winter, fresh air should also be heated to ensure a suitable indoor temperature.

2. Heating system: its function is to heat the air in the car or the fresh air entering the car from the outside to achieve the purpose of heating and dehumidification.

3. Refrigeration system: its function is to reduce the temperature inside the car when the ambient temperature outside the car is high, so that the passengers feel cool and comfortable.

4. Air purification system: its function is to filter the introduced air, continuously remove the foul gas in the car interior, and keep the air in the car clean.

5. Control system: The control system is mainly composed of electrical components, vacuum pipelines and operating mechanisms. Its function is to control the temperature and pressure of the refrigeration and heating system on the one hand, and to control the temperature, air volume and flow direction of the air in the vehicle room on the other hand, so as to improve the functions of the air conditioning system.

Automotive air conditioners are generally mainly composed of compressors, electronically controlled clutches, condensers, evaporators, expansion valves, receiverdriers, pipes, condensing fans, vacuum It is composed of solenoid valve (vacuumsolenoid), idle speed device and control system. Automotive air conditioners are divided into high-pressure pipelines and low-pressure pipelines. The high pressure side includes the compressor output side, high pressure pipeline, condenser, liquid receiver dryer and liquid pipeline; the low pressure side includes the evaporator, accumulator, return gas pipeline, compressor input side and compressor oil pool.

Liquid receiver dryer - is actually a device that stores refrigerant and absorbs moisture and impurities in the refrigerant. On the one hand, it is equivalent to the fuel tank of the car, supplementing the refrigerant for the extra space of the leaked refrigerant. On the other hand, it acts like an air filter to filter out impurities doped in the refrigerant. The liquid storage dryer is also equipped with a certain amount of silica gel to absorb moisture.

Condenser and Evaporator - Although they are named differently, they are similar in structure. They are all devices that are covered with metal sheets for heat dissipation on a row of curved pipes, 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 refrigerant heat dissipation in its pipes from gaseous to liquid. Its principle is similar to that of the engine's cooling water tank (the difference is only that the water in the water tank is always liquid), so it is often installed at the front of the car, together with the water tank, to enjoy the cool breeze from the front. In short, the condenser is where it is cool, so that it can dissipate heat and condense. The evaporator is the exact opposite of the condenser, which is the place where the refrigerant changes from liquid to gas (ie, evaporates) to absorb heat.