| 摘要 |
Liquid pressure amplification with bypass is used in an air-conditioning or refrigeration system which includes a compressor (12), a condenser (14), a pump (32), an expansion valve (16), and an evaporator (18), interconnected by conduits in a closed refrigerant loop. A first conduit (13) coupling an outlet of the compressor to an inlet to the condenser. A centrifugal pump (32) is coupled to the condenser (14) (or receiver) outlet for boosting the pressure of the condensed liqid refrigerant by a substantially constant increment. A second conduit (15) transmits a first portion of the condensed liquid refrigerant from outlet of the pump through the expansion valve (16) into the evaporator (18) to effect cooling. Condensed liquid refrigerant can be injected into the condenser inlet (36) to cool the superheated vapor refrigerant. A bypass (50) having a valve (54) directs refrigerant around the pump if the pump is idled while the compressor remains in operation.
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