Liquid accumulator: The liquid accumulator is installed after the condenser and is directly connected to the discharge pipe of the condenser. The refrigerant liquid of the condenser should flow into the liquid receiver unimpeded, so that the cooling area of the condenser can be fully utilized. On the other hand, when the heat load of the evaporator changes, the demand of the refrigerant liquid also changes accordingly, and the accumulator plays the role of adjusting and storing the refrigerant at that time. For the small chiller refrigeration system, the liquid receiver is often not installed, but the condenser is used to adjust and store the refrigerant.

Filter drier: In the refrigeration cycle of the chiller, it is necessary to prevent the entry of moisture and dirt (oil, iron filings, copper filings), etc. The source of moisture is mainly the trace moisture contained in the newly added refrigerant and lubricating oil, or due to Moisture from air ingress during system maintenance. If the water in the system is not removed, when the refrigerant passes through the throttle valve (thermal expansion valve or capillary), the water will sometimes freeze into ice due to the drop in pressure and temperature, blocking the channel and affecting the normal operation of the refrigeration device. Therefore, a filter drier must be installed in the chiller refrigeration system.

Evaporator: The evaporator is a heat exchange device that relies on the evaporation (actually boiling) of the refrigerant liquid to absorb the heat of the cooled medium. Its function in the refrigeration system is to absorb heat (or output cooling). In order to ensure that the evaporation process can be carried out stably and lastingly, the evaporating gas must be continuously pumped out by the refrigeration compressor to maintain a certain evaporation pressure.

Thermal expansion valve: The thermal expansion valve is not only a flow control valve in the chiller refrigeration system, but also a throttle valve in the refrigeration equipment. It is installed between the drying filter and the evaporator in the refrigeration equipment. It is wrapped at the outlet of the evaporator. Its main function is to throttle and depressurize the high-pressure and normal-temperature refrigerant liquid when it flows through the thermal expansion valve, and turn it into a low-temperature and low-pressure refrigerant wet vapor (mostly liquid, a small part of which is vapor), which enters the evaporator and vaporizes in the evaporator. Absorb heat to achieve the purpose of cooling and cooling.

Refrigerant: Most industrial chillers used in modern industry use R22 or R12 as refrigerant. Refrigerant is the flowing working medium in the refrigeration system. Its main function is to carry heat, and to absorb and release heat when the state changes.