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    Refrigeration compressor classification overview

    Refrigeration compressor classification overview The compressor is the core equipment in the refrigeration system. Only by converting electrical energy into mechanical work and compressing the low-temperature and low-pressure gas refrigerant into high-temperature and high-pressure gas can the refrigeration cycle be ensured. 　　 1. Volumetric type: By changing the volume of the working chamber, the quantitative gas periodically inhaled is compressed. 　　 1. Reciprocating piston type: The working volume of the cylinder is changed by the reciprocating motion of the piston. 　　 is divided into: 　　① Fully enclosed: the cooling capacity is less than 60KW, which is mostly used in air conditioners and small refrigeration equipment. 　　 The drive motor and moving parts are enclosed in the same space, with compact structure, good sealing and low noise. But the power is small and it is not easy to maintain. Common brands: Franco-Brazil Taikang, Franco-American Youle, Miguel, Bristol, Denmark Danfoss, Italy Embraco, Electrolux, Japan Hitachi, Panasonic, Toshiba, Sanyo, Mitsubishi, DAKIN Daikin, Korean LG , China Chunlan, etc. 　　② Semi-closed: the cooling capacity is 60～600KW, which can be used in various air conditioners and refrigeration equipment. 　　Crankcase body and motor casing together form a closed space, stable working life, long cooling capacity, can be used in a variety of working conditions, can be maintained, but the noise is slightly higher. Divided into single-stage compression type (conventional type, disc valve type, unloading type, communication type) and two-stage compression type. 　　 Common brands: Virtue, Copeland, De Bizer, Bock, Grasso, Italy, Fuji Hao, Lai Fukang, Japan, Mitsubishi, Hitachi, Sanyo, China Taizhou Xuemei, Dalian Bingshan, Nanjing Wuzhou, etc. 　　③ Open type 　　Compressor and motor are respectively connected to the outside of the two devices, the structure is complicated and heavy, the work is unstable, and it is nearly eliminated. 　　 2. Swivel type: The working volume of the cylinder is changed by the rotary motion of the slewing body. 　　 Classification according to internal structure: 　　① Rolling rotor type: cooling capacity 8～12KW, mostly used in small air conditioners and refrigeration equipment. 　　 is fully enclosed, compact structure, good sealing, low noise. But the power is small and it is not easy to maintain. 　　 Common brands: Mitsubishi, Hitachi, Panasonic, Sanyo, Toshiba, Qing'an, Huangshi Dongbei, etc. 　　② Scroll type: The cooling capacity is 8～150KW, which can be used in various air conditioners and refrigeration equipment. 　　 is fully enclosed, with simple and compact structure, high working performance, good sealing and low noise. It will be the leading model in the future. 　　Common brands: Virtue, Copeland, Franco-American, Le Hitachi, Panasonic, Daikin, Sanyo, Chunlan, etc. 　　③ Screw type: The cooling capacity is 100～1200KW, which can be used in large and medium-sized air conditioners and refrigeration equipment. 　　 is semi-closed type, compact structure, high working performance, large cooling capacity and stepless adjustment, but the lubricating oil system is more complicated and the noise is higher. Divided into single and twin screw type. Common brands: Derby Zell, Grasso, Fujitsu Italy, Lai Fukang, Duoling, Japan Hitachi, Daikin, Mitsubishi Heavy Industries, Kobelco, Korea, foreign countries, Taiwan Fusheng, Han Bell, China Jialing, Dalian Iceberg, etc. . 　　 II. Centrifugal type: by the action of centrifugal force, the compressed gas is continuously compressed. 　　 The maximum cooling capacity is up to 30000KW, which is used in large air-conditioning and refrigeration equipment. 　　 Stable work, high performance, long life, large cooling capacity, stepless adjustment. 　　 Common brands: US TRANE Trane, CARRIER Carrier, YORK York and MCQUAY McQuay, Japan’s MITSUBISHI Mitsubishi Heavy Industries, HITACHI Hitachi and EBARA, Swiss SULZER, Korean and Chinese manufacturers, etc.

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