1. Basic composition
Automobile air conditioning refrigeration system is composed of compressor, condenser, dry liquid storage tank, expansion valve, evaporator and fan, etc. A closed system is connected with copper pipe (or aluminum pipe) and high pressure rubber pipe.
2 .Functional classification
It is divided into automatic air conditioning and manual air conditioning. When the driver sets the desired temperature and the desired temperature, the automatic control device will keep the desired temperature and improve the comfort and operability of the vehicle to adjust the temperature of the car.
3.Refrigeration principle
The refrigerant circulates in the air conditioning closed system in different states, and each cycle is divided into four basic processes:
Compression process: the compressor absorbs the low temperature and low pressure refrigerant gas at the evaporator outlet of the evaporator, and compress it into high temperature and high pressure gas to discharge the compressor.
Heat dissipation process: high temperature and high pressure overheated refrigerant gas enters the condenser. Due to the decrease of pressure and temperature, the refrigerant gas condenses into a liquid and emits a large amount of heat.
Thttling process: after the refrigerant liquid with high temperature and pressure passes through the expansion device, the volume becomes larger, the pressure and temperature drop sharply, and the fog (fine droplets) discharge the expansion device.
Absorption process: the fog refrigerant liquid enters the evaporator, so the boiling point of the refrigerant is far lower than the temperature in the evaporator, so the refrigerant liquid evaporates into gas. In the evaporation process, a lot of absorption of the surrounding heat, and then the low temperature and low pressure refrigerant vapor into the compressor. The above process is carried out repeatedly to reduce the temperature of the air around the evaporator.
4. Schematic diagram of refrigeration
In the middle of the cab dashboard for air conditioning indoor unit host, including air conditioning evaporator, expansion valve, radiator, fan and indoor air mechanism, dry storage is installed in the left part, the cab in the dry reservoir end for high and low voltage air conditioning switch, its function is to protect the air conditioning system, compressor installed in the front of the engine, the power from the engine, so to use the air conditioning must first start the engine. The condenser is installed on the inside of the right car pedal of the cab (side air conditioning) or the front end of the engine radiator (front type). The side air conditioning condenser comes with a cooling fan, and the front air conditioning condenser directly relies on the heat dissipation system of the engine to dissipate heat. The high pressure pipeline of air conditioning is thin, the air conditioner will be hot after refrigeration, the low pressure pipeline of the air conditioner is thick, and the air conditioner will become cold after refrigeration.
Post time: May-23-2024
