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) QX -B12 1930 6585 670 220 ~ / 50 \ 750 QX-B14 2200 7510 710 220 ~ / 50 \ 800 QX-B15 2420 8260 790 220 ~ / 50 \ 850 QX-B16 2630 8975 850 220 ~ / 50 \ 900 QX-B17 2750 9380 875 220 ~ / 50 \ 1100 QX-B18 2900 9895 975 220 ~ / 50 \ 1100 QX-B19 3100 10580 1040 220 ~ / 50 \ 1100 QX-B20 3250 11090 1085 220 ~ / 50 \ 1100 compressors for refrigeration systems The core equipment, it is only through electrical energy into mechanical power, the low-temperature low-pressure refrigerant gas compressed to high temperature and high pressure gas, in order to ensure the 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.