| 摘要 |
PURPOSE:To permit the waste heat recovery of hot-water in a bathtub or the additional heating or the like of a bath by a method wherein the return pipe of a solar heat collector is connected to the upper part of a hot-water reserving tank while the return pipe is provided with a heater and a natural circulation type heat exchanger for the water in the bathtub at the mid-way thereof. CONSTITUTION:The solar heat collector 17 and the hot-water reserving tank 13 are connected by a pipe 19 interposed with a circulating pump 18 while hot- water, heated in the collector 17, is returned to the upper part of the hot-water reserving tank 13 through the return pipe 22. A three-way valve 21 is provided in the return pipe 22 to branch a bypass pipe 25 in a bypass route 28 while the pipe 25 is connected to the heat exchanger 26 in the natural circulating type heat exchanger 30 communicated with and connected to the bathtub 32. A bypass return pipe 27 is connected to the return pipe 22 at the downstream side of the three-way valve 21. A heating device 20, consisting of a heat exchanger 24, a burner 23 and the like, is arranged at the upstream side of the three-way valve 21 while the additional heating of the bath is permitted by the operation of the device 20. |
