| 摘要 |
PURPOSE:To reduce the manufacturing cost improve the installation space by forming a bathtub vessel as a heat exchanger and coating the vessel of bathtub with a cover made of a heat insulating material. CONSTITUTION:The heat exchanger 56 uses the vessel itself of the bathtub vessel 60 as a part of the heat exchanger, and the vessel 60 is coated with a cover 61 made of a heat insulating material, a space 57 being formed in the bathtub vessel 60 and a heat medium being caused to flow within the space 57. When the heat collector 51 is heated and reaches a predetermined temperature, a pump is driven by a signal of a temperature detector 80 to circulate the heat medium within the enclosed passage. The heat medium which has passed through the heat collector 51 is heated, and the heat exchange is performed and water within the bathtub vessel 60 stored heat. When the heat collector 51 is stopped to be heated by the solar heat and the heat collecting temperature due to the heat collector 51 is lowered to a temperature below the temperature of water within the bathtub vessel 60, the pump 55 is stopped to operate to stop the circulation of the heat medium, thereby preventing the radiation of the temperature within the bathtub vessel 60. |
