The core heart of the chiller-compressor

The core heart of the chiller-compressor

The core heart of the chiller-compressor Power compressor is indispensable when refrigeration equipment is cooling. Such as chillers, chromatography freezers, ice machines, ultra-low temperature refrigerators, etc., their driving force is the refrigeration compressor, the entire refrigerant cycle is the refrigeration compressor, so the role of the refrigeration compressor is inestimable! The most important thing in the selection of refrigeration equipment is the purchase of refrigeration compressors, which directly determine the amount of refrigeration. This article introduces the role, classification and application scope of refrigeration compressors! 　Refrigeration compressor, that is, refrigerant compressor, is a key part that determines the capacity of the vapor compression refrigeration system, and has a direct impact on the system's operating performance, noise, vibration, maintenance and service life. The role of the refrigeration compressor in the system is to suck the refrigerant vapor from the evaporator, increase its temperature and pressure, and discharge it to the condenser. In the condenser, the high-pressure superheated refrigerant vapor condenses exothermically at the condensation temperature. Then through the throttling element, the depressurized gas-liquid mixture flows to the evaporator, where the refrigerant liquid absorbs heat and boils at the evaporating temperature, converts to vapor and enters the compressor, thereby realizing the continuous circulation of refrigerant in the refrigeration system . It can be seen that the refrigeration compressor is relative to the heart of the system Classification of refrigeration compressors: 　There are many types of refrigeration compressors. According to the working principle, they can be divided into volume type and speed type. The volume type can be divided into two types according to the movement characteristics of the compression part: reciprocating piston type (referred to as piston type) and rotary type. Rotary type can be divided into rolling piston type (also called rolling rotor type), sliding type, screw type (including twin screw type, single screw type), scroll type, etc. according to the structural characteristics of the compressor. The speed type is carried out continuously according to the compressor compression process, and the main application is the centrifugal refrigeration compressor. According to the classification of evaporation temperature, it can be generally divided into three high-temperature, medium-temperature and low-temperature compressors. High temperature refrigeration compressor: -10C~10C; medium temperature refrigeration compressor: -20; C~-10C; low temperature refrigeration compressor: -45C~-20C. 　According to the classification of the sealing structure, it can generally be divided into open-type compressors and closed-type compressors. The hermetic compressor can be divided into semi-hermetic and fully hermetic. Refrigeration compressors have a wide range of applications. From small to large, there are household refrigerator freezers, room air conditioners, automotive air conditioners, residential air conditioners and heat pumps, commercial refrigeration and air conditioners, and large air conditioners. Among them, the most widely used unit equipment is the chiller, which includes several refrigeration compressors, motors, consoles, condensers, evaporators, filter driers, throttling devices, power distribution cabinets, energy adjustment mechanisms, and various A variety of safety protection facilities, all assembled together, can provide 5 ~ 15C low temperature cold water unit equipment called chiller. Water chillers are suitable for comfortable air conditioners in various large buildings such as hotels, halls, theaters, shopping malls, hospitals, etc., as well as industrial air conditioners or industrial cold water required by industries such as machinery, textiles, chemicals, instrumentation, and electronics.