| 摘要 |
PURPOSE:To contrive to improve the heat transmission performance by a structure wherein a second heat exchanger is provided in a second heat exchange tank located below a liquid receiver tank. CONSTITUTION:A second heat exchanger 16 is provided in a second heat exchange tank 15, which is arranged below a liquid receiver tank 7 and in which hot water to be supplied is stored. The second heat exchanger 16 is connected to the lower part of the liquid receiver tank 7 by means of a return pipe 9 and to the lower part of a collector 1 by means of a return pipe 17, in the midway of which a second check valve 4b is provided. Due to the structure as mentioned above, when working liquid 12 is recovered from the liquid receiver tank 7 to the collector 1, the working liquid 12 is flowed through the return pipe 9 to the second heat exchanger 16 in order to heat exchange the liquid 12 with the hot water to be supplied in the second heat exchanger 15 and to lower the heat collecting temperature of the collector 1 by recovering the resultant cooled working liquid 12 in the collector 1. As a result, the improvement of the heat collecting efficiency is contrived. |
