The working principle and structure of the refrigerator
The working principle and structure of the refrigerator in the car
The basics of the refrigerator The working principle is the same as that of the general onshore refrigerated fresh-keeping cabinet, but due to the speciality of the car air conditioner installed on the moving car. The main differences are:
First, the general land power is electricity, while the power of the car is taken from the car engine;
Second, the general land stop and start control It is realized by the on-off of the compressor motor circuit, and the extension of the car controls the on-off of the windings of the compressor chamber; Fully enclosed compressors, and automotive air conditioners can only use the open-hole type because of the requirements of the power transmission between the compressor and the engine.
Various types of refrigerators in automobiles vary with the form and requirements of the automobile. For high-end tourist cars, luxury models are required, the interior of the car is comfortable, the airflow organization of the air conditioning system, and the temperature adjustment and control are all automatic; for large passenger cars, it is required to have a certain degree of comfort, but also must take into account investment, operation and maintenance costs; while small cars The requirements for air conditioners are more compact in structure and easy to use and maintain.
It mainly includes compressor, condenser, dry liquid receiver, expansion width, evaporator, air garden and pipeline, control components, etc.
Compressors
Commonly used compressors are reciprocating piston type, swash plate type and rotary type. Rotary type is divided into fixed type, orange Jt type, screw type, scroll type and so on. The following is only a brief introduction to the common reciprocating piston type and swash plate type in Arne. The working principle of the reciprocating piston compressor is exactly the same as that of the ordinary piston compressor. Its speed is 700Tev/m plus when the car engine is on the market. When the car is running at 40km/h, the compressor speed is 1800rev/m5n, and the maximum speed can reach 2200rev/min. Some models of compressors also have an automatic unloading mechanism, and the condenser and liquid receiver of the refrigerator can adjust the exhaust steam volume of the compressor at high speed. before the mouth. The common models of reciprocating piston compressors are 2c 90c and 2M110B produced by the company. The system of reprinting 12R engine all adopts 2c 9Dc reciprocating piston compressor.
