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How Air Conditioning Refrigeration System Works

Edit： Click：154 Date：2021-05-26

When the system is working, the compressor sucks the low-temperature and low-pressure refrigerant vapor generated by the evaporator into the cylinder, and after being compressed by the compressor, when the pressure rises (the temperature also rises) to a slightly greater than the pressure in the condenser, the The high pressure refrigerated vapor is discharged into the condenser.

In the condensation, the high-temperature and high-pressure refrigerant vapor exchanges heat with air (or normal temperature water) at a lower temperature and condenses into a liquid refrigerant. At this time, the liquid refrigerant is cooled (depressurized) by the expansion valve and then enters the evaporator, where it evaporates. After absorbing the heat of the object being cooled, it vaporizes. In this way, the cooled object is cooled and the refrigerant vapor is sucked away by the compressor. Therefore, a cycle is completed in the refrigeration system through the four processes of compression, condensation, expansion and evaporation.

1. Evaporator The evaporator is a very important part of the four major refrigeration components. The low-temperature condensed "liquid" passes through the evaporator to exchange heat with the outside air, and "gas" absorbs heat to achieve the effect of refrigeration.

2. Compressor Compressor is an important part of refrigeration. If the refrigerant is compared to the blood of the human body, then the compressor is the heart of the human being, and it is the driving force for the refrigerant to circulate in the refrigeration system. It absorbs the low-temperature and low-pressure gas from the evaporator, drives the piston to compress it through the operation of the motor, and discharges the high-temperature and high-pressure refrigerant gas to provide power for the refrigeration cycle. Compressors are divided into piston compressors, screw compressors, centrifugal compressors, etc.

3. Condenser The condenser is a heat exchanger that cools and liquefies the high-temperature refrigerant vapor compressed by the refrigeration compressor.

4. Throttle valve The function of the throttle valve is to throttle the saturated liquid or subcooled liquid under the condensing pressure in the condenser to the evaporating pressure and evaporating temperature, and at the same time adjust the flow of refrigerant entering the evaporator according to the change of load . Expansion valves are common throttling devices in refrigeration systems.

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