| 摘要 |
An integrated heat pump and hot water system can be operated in a space heating mode, a space cooling mode, or a water heating mode, with or without space heating or cooling. In the event that water heating is demanded without either space heating or cooling, a flow restriction arrangement in the liquid refrigerant line is actuated to limit the capacity of the compressor, and thus match the water heat exchanger capacity as much as possible. The selective restrictive arrangement has a valve arrangement selectively blocking the full flow of refrigerant along the condensed refrigerant line, and a restrictive bypass arrangement bridging around the valve arrangement. This can comprise one or more capillary tubes. A quenching branch line extends between the selective restricting arrangement and the suction line that returns evaporated refrigerant to the suction port of the compressor. This quenching branch line favorably comprises a solenoid valve and a flow restricting device connected in series. The valve arrangement of the selective restriction arrangement can be a pair of solenoid valves connected back to back, or can be a pressure activated valve. |
