Introduction to the basic principles of refrigeration units
The refrigeration unit can be divided into 4 systems, namely water system, fluorine system, oil system and electric control system. The oil system refers to the lubricating oil system.
Generally, the refrigeration unit is divided into 4 parts, namely compressor, condenser, evaporator, and throttle valve (expansion valve).
Compressor is the main component that provides power for the Freon cycle, and is also the energy-consuming part of the refrigeration unit. It is generally driven by a motor, and screw compressors and scroll compressors are common.
The main function of the condenser is to provide conditions for Freon heat exchange. The Freon discharged from the compressor is a high-temperature and high-pressure gas, and the Freon is cooled into a low-temperature and high-pressure liquid in the condenser. The refrigerant of the condenser generally has two forms of water cooling and air cooling, and the water cooling form has a cooling tower.
The main function of the evaporator is to provide conditions for the evaporation and heat exchange of Freon. Freon flows from the high-temperature liquid through the throttle valve and then evaporates. It absorbs frozen water through evaporation (sometimes not necessarily frozen brine, but also other refrigerants such as ethylene glycol). ) To complete a refrigeration process.
The main function of the throttle valve (expansion valve) is to control the flow of freon. It is generally installed between the liquid storage tank and the evaporator. The expansion valve makes the medium-temperature and high-pressure liquid refrigerant through its throttling into low-temperature and low-pressure wet steam, and then refrigerates The agent absorbs heat in the evaporator to achieve the cooling effect.