The chiller uses the limited refrigerant int he closed refrigeration system, repeatedly compressing, condensing, expanding and evaporating the refrigeratn, and constantly absorbs heat and vaporizes in the evaporator to refrigerate and cool down. The chiller is composed of compressor, condenser, evaporator, evaporator, expansion valve, circulating water pump, electric control system and rack, etc.
In the refrigerator circulation system, the refrigerant is compressed to form a gas-liquid mixture, and afer condensing through the condenser, the heat is transferred to the cooling water. Under the control of the throttling device, the refrigerant absorbs heat in the evaproator and gradually vaproizes, so that a certain temperature difference is formed between the refrigerant and water. After the liquid refrigerant completely evaporates into a gaseous state, it is sucked in and compressed by the compressor to increase the pressure and temperature. The gas refrigerant condenses into a liquid by absorbing heat through an air-cooled or water-cooled condenser. It passes through thermal expansion valve or capillary throttle and then becomes low temperature and low pressure refrigerant into the evaporator. The refrigerant circulation process is completed.