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The basic composition of the chiller refrigerator system


The basic composition of the chiller refrigerator system


The compressor is the core component of the entire refrigeration system and the power source for refrigerant compression. Its function is to convert the input electrical energy into mechanical energy, compress the refrigerant vapor, increase the temperature and pressure, and discharge the condenser.

The basic composition of the chiller refrigerator system


In the refrigeration process, the condenser plays the role of outputting heat and condensing the refrigerant. After the high-pressure superheated steam discharged from the refrigeration compressor enters the condenser, all the heat absorbed during the working process is transferred out, including the heat absorbed from the evaporator, the refrigeration compressor and the pipeline to the surrounding medium (water or air) is taken away , the high-pressure superheated vapor of the refrigerant is re-condensed into liquid. (According to the cooling medium and cooling method, condensers can be divided into three categories: water-cooled condensers, air-cooled condensers and evaporative condensers.)


The accumulator is installed after the condenser and is directly connected to the exhaust pipe of the condenser. The refrigerant liquid of the condenser should flow into the liquid receiver smoothly, 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 for refrigerant liquid also changes, and the accumulator plays the role of regulating and storing the refrigerant at this time. For the refrigeration system of small chillers, the liquid receiver is often not installed, but the condenser is used to regulate and store the refrigerant.

Filter dryer

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 the air during system maintenance. Moisture enters. If the water in the system is not completely 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 unit. Therefore, filter dryers must be installed in chiller refrigeration systems.

Thermal expansion valve

The thermal expansion valve is not only the flow control valve in the chiller refrigeration system, but also the throttle valve in the refrigeration equipment. It is installed between the drier filter and the evaporator of the refrigeration equipment. Its temperature-sensing package is wrapped around the vaporizer. Export of equipment. Its main function is to throttle and decompress the high-pressure, normal-temperature refrigerant liquid when it flows through the thermal expansion valve, so that it becomes the wet vapor (mostly liquid and a small part is steam) of the low-temperature, low-pressure refrigerant and enters the evaporator. Evaporate in the evaporator. Absorb heat to achieve the purpose of cooling down.


The evaporator is a heat exchange device that absorbs the heat of the cooling medium by relying on the evaporation (actually boiling) of the refrigerant liquid. Its role in the refrigeration system is to absorb heat (or output cold). In order to ensure that the evaporation process can be carried out stably, it is necessary to continuously pump the evaporated gas with a refrigeration compressor to maintain a certain evaporation pressure.

The refrigerant

The refrigerant is the working fluid flowing in the refrigeration system. Its main function is to carry heat and to absorb and release it when states change. Most industrial chillers used in modern industry use R22 or R12 as refrigerant. With the increasing emphasis on environmental protection, environmentally friendly refrigerants such as R407C and R134A will gradually replace refrigerants harmful to the environment such as R22.

Industrial filter supplier

Wuxi Master Cooling Machinery Manufacturing Co., Ltd. is a professional manufacturer of water cooling towers and related equipments including cooling tower, chiller, evaporative condenser, water treatment and other accessory parts. Master Cooling products are widely used in electric power, chemical industrial, metallurgy, cooling, light industrial, civil facilities and other fields.

If you have any questions about the chiller or other equipment, feel free to contact Mastercoolingtower.

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