Basic Composition Of The Cooling Machine

Condenser: During the refrigeration process, the condenser plays a role in outputting heat energy and allowing the refrigerant to condense. After the high-pressure superheated steam discharged from the refrigeration compressor enters the condenser, all the heat absorbed during its working process, including the heat absorbed from the evaporator, refrigeration compressor, and pipeline, is transferred to the surrounding medium (water or air) for removal; The high-pressure superheated vapor of the refrigerant condenses back into a liquid. (According to different cooling media and methods, condensers can be divided into three categories: water-cooled condensers, air-cooled condensers, and evaporative condensers.)
The liquid receiver is installed after the condenser and is directly connected to the discharge pipe of the condenser. The refrigerant liquid of the condenser should flow smoothly into the reservoir, 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 at that time, the liquid receiver plays a role in regulating and storing the refrigerant. For small chiller refrigeration systems, a liquid storage device is often not installed, but a condenser is used to regulate and store refrigerant.
The drying filter must prevent the entry of moisture and dirt (oil, iron, copper) during the refrigeration cycle of the chiller. The main source of moisture is the trace moisture contained in the newly added refrigerant and lubricating oil, or the moisture brought by the air entering the maintenance system. If the water in the system is not completely discharged, when the refrigerant passes through the throttle valve (thermal expansion valve or capillary), sometimes the water will solidify into ice due to the decrease in pressure and temperature, causing channel blockage and affecting the normal operation of the refrigeration device. Therefore, it is necessary to install a drying filter in the chiller refrigeration system.
Evaporator: Evaporator is a heat exchange device that relies on the evaporation (actually boiling) of refrigerant liquid to absorb the heat of the cooled medium. Its function in the refrigeration system is to absorb heat (or output cooling capacity). In order to ensure the stable and long-lasting evaporation process, it is necessary to continuously use a refrigeration compressor to extract the evaporated gas to maintain a certain evaporation pressure.
Thermal expansion valve: The thermal expansion valve is not only a flow regulating valve in the refrigeration system of a chiller, but also a throttle valve in the refrigeration equipment. It is installed between the drying filter and the evaporator in the refrigeration equipment, and its temperature sensing bulb is wrapped at the outlet of the evaporator. Its main function is to regulate and depressurize the refrigerant liquid at high pressure and room temperature when passing through the thermal expansion valve, transforming it into a low-temperature and low-pressure refrigerant wet vapor (mostly liquid, with a small portion of vapor), entering the evaporator, where it vaporizes and absorbs heat, achieving the purpose of refrigeration and cooling.
Refrigerant: Most industrial chillers used in modern industry use R22 or R12 as the refrigerant. Refrigerant is a flowing working fluid in a refrigeration system, its main function is to carry heat and achieve heat absorption and release when the state changes.