| 摘要 |
<p>A variable capacity modular refrigerating installation which has several modular refrigerating units. Each modular unit has a refrigerating circle which includes a refrigerating compressor unit (1), an evaporator (4) and a condenser (10). A flow control valve (6) is mounted at the refrigerating medium inlet/outlet port of the evaporator (4); and/or a flow control valve (11) is mounted at the inlet/outlet port of the condenser (10). The refrigerating compressor unit (1) is mounted an adjustable frequency motor (1A) and a compressor (1B) with magnetic suspend bearings. Each modular unit is also provided with an inlet pressure sensor (26) and/or discharge pressure sensor (27), a chilled water temperature sensor (19), a sensor (20) and a sensor (21) each for pressure difference between supply and return of the unit side and the load side of the refrigerating medium system, and a sensor (22) each for pressure difference between supply and return of the cooling medium system unit side. The present invention can decrease the power consumption of the air conditioning system, and provide a convenient and improved control.</p> |
