| 摘要 |
A heat pump system ( 10 ) includes a compressor ( 20 ), a reversing valve ( 30 ), an outdoor heat exchanger ( 40 ) and an indoor heat exchanger ( 50 ) coupled via refrigerant lines ( 35, 45, 55 ) in a conventional refrigeration circuit, and a refrigerant-to-water heat exchanger ( 60 ). In the air cooling with water heating mode, the air heating with water heating mode and the water heating only mode, water from a water reservoir ( 64 ), such as a storage tank or swimming pool, is passed through heat exchanger ( 60 ) in heat exchange relationship with refrigerant passing through line ( 35 ). A refrigerant reservoir ( 70 ) may be provided for use in refrigerant charge control. A refrigerant line ( 71 ) couples reservoir ( 70 ) to the refrigerant circuit intermediate the outdoor and indoor heat exchangers for directing liquid refrigerant into the reservoir ( 70 ) and a refrigerant line ( 73 ) couples the refrigerant circuit upstream of the suction inlet to the compressor ( 20 ) for returning refrigerant to the refrigerant circuit. A controller ( 100 ) controls flow into and from the refrigerant reservoir ( 70 ) through selective opening and closing of control valve ( 72 ) in line ( 71 ) and control valve ( 74 ) in line ( 73 ).
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