| 摘要 |
PURPOSE:To contrive to improve the temperature rising performance of a solar water heater by a constitution wherein a check valve is arranged in a flow pipe and a liquid receiving tank and a stop valve are arranged in a return pipe and further a heat pump circuit is formed in series between the midway between the liquid receiving tank and the stop valve and the midway between the heat exchanger and the check valve. CONSTITUTION:A check valve 7 is connected to a flow pipe 4 and a liquid receiving tank 8 and a stop valve 9 are connected to a return pipe 5. An expansion valve 10, a second heat collector 11 and a compressor 12 are connected in series in the midway of a branch pipe, which is branched off from the midway between the liquid receiving tank and the stop valve and connected to the midway between a heat exchanger 3 and the check valve 7. The start and stop of the compressor 12 and the opening and closing of the stop valve 9 are performed interlockingly with each other by means of a detecting means in the liquid receiving tank 8. |
