Compressor refrigeration system, the core device, it is only through electrical energy into mechanical power, the low-temperature low-pressure refrigerant gas compressed into high-temperature high-pressure gas, in order to ensure cooling cycle. According to the external structure is divided into: 1. Closed: cooling capacity of less than 60KW, used for air conditioners and small refrigeration equipment. Drive motor and moving parts enclosed in the same space, compact structure, good sealing, low-noise sound. But less power, easy maintenance. 2. Semi-closed: cooling capacity 60 ~ 600KW, can be used for a variety of air-conditioning ﹑ refrigeration equipment. By crankcase housing and motor body together constitute an enclosed space, long stable life, greater cooling capacity can be used for a variety of conditions, maintainability, but slightly impatient voice. Divided into single-stage compression type (conventional type, butterfly valve type, unloading type, connectivity type) and two-stage compression type. ﹑ For a variety of air-conditioning refrigeration equipment. 3. Scroll rotor type: Cooling capacity 8 ~ 12KW, and more for small air conditioners and refrigeration equipment, is fully enclosed, compact structure, good sealing, low-noise sound. But less power, fully enclosed, simple compact, high performance, good sealing, low-noise sound, leading models for the future. Common brands: virtue COPELAND Copeland, France MANEUROP MANEUROP, Japan HITACHI Hitachi, Daikin DAKIN ﹑ ﹑ ﹑ NATIONAL Panasonic Sanyo SANYO, China Chunlan ﹑ ﹑ Meizhi Gree. Model Rated input power supply to run cooling capacity refrigerant charge capacitance maximum amount Model NOMINIAL INPUT POWER RUN MAX CAPACITY POWER SOURCE CAPACITY PEFRIGERANT CHARGE (W) (Btu / h) (W) (V / HZ) (μF) (ɡ) QXC -34u 5970 20375 1990 220 ~ 2400 ~ / 50 50 1600 QXC-36u 6240 21297 2080 220 ~ 2400 ~ / 50 50 1800 QXC-38u 6710 22900 2260 220 ~ 2400 ~ / 50 50 1900 QXC-40u 7090 24200 2450 220 ~ 2400 ~ / 50 50 2300 QXC-42u 7350 25085 2580 220 ~ 2400 ~ / 50 50 2300 QXC-45u 7750 26485 2760 220 ~ 2400 ~ / 50 50 2700