The working principle and structure analysis of car refrigerator

The basic working principle of the refrigerator is similar to that of the general land refrigerated fresh-keeping cabinet, but due to the particularity of the car air conditioning installed on the moving car. The main differences are:

First, the general power of land is electricity, and the power of car operation is taken from the car engine;

Second, the general stop and start on land is realized by controlling the electromechanical circuit of the compressor, and the extension of the car is realized by controlling the power of the winding of the compressor.

Third, in order to reduce vibration and noise, fully enclosed compressors are commonly used, and automotive air conditioners can only use open grotts in the requirements of compressor and engine power transmission.

Various types of car reefers vary with the form and requirements of the car. For the advanced tour bus, the model is required to be luxurious, the car is comfortable, the air flow organization of the air conditioning system, and the temperature regulation control are automatic; For the large bus, it is required to have a certain comfort, but also must take into account the cost of investment, operation and maintenance. The requirements of car air conditioning are more focused on compact structure and easy to use and maintain.

It mainly includes compressor, condenser, dry liquid reservoir, expansion width, evaporator, wind garden and pipeline, control components and so on.

compressor

Commonly used compressors are reciprocating piston, swash plate and rotary. Rotary type is divided into fixed plate 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 of Arne. Reciprocating piston compressors such compressed vanadium working principle is exactly the same as ordinary piston compressors. Its speed is 700Tev/m plus when the car engine is on the market, when the car is traveling at 40km/h, the compressor speed is 1800rev/m5n, and the maximum speed can reach 2200rev/min. Some models of the compressor itself also has an automatic unloading mechanism, and the condenser and liquid reservoir of the refrigerator adjust the exhaust volume of the compressor at high speed. Before the mouth. Common models of reciprocating piston compressors are 2c90c and 2M110B. 2c9Dc reciprocating piston compressors are used in all systems that transfer 12R engines.