| 20090013702 | REFRIGERANT CHARGE CONTROL IN A HEAT PUMP SYSTEM WITH WATER HEATER - A heat pump system includes a compressor, a reversing valve, an outdoor heat exchanger and an indoor heat exchanger in a circuit, and a refrigerant-to-water heat exchanger. 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 is passed through refrigerant-to-water heat exchanger. A refrigerant reservoir may be provided for use in refrigerant charge control. A refrigerant line ( | 01-15-2009 |
