| 摘要 |
PURPOSE:To unnecessitate power source equipment, to reduce the power consumption and to improve the hot water supply efficiency by driving a pump device and the like by an electromotive force of a thermal power generating element mounted on a hollow cylinder heater by the flame of a burner. CONSTITUTION:The contact surface on the inner peripheral surface side of a thermal power generating element 13 is heated to high temperatures by the flame of a burner 12 and an exhaust hot gas. On the other hand, the contact surface on the outer peripheral surface side of the thermal power generating element 13 makes face-contact with the inner wall 33a of an inner cylinder 33 of a first heat exchanger 1. The heat of the thermal power generating element 13 is dissipated in water within a flowpath 31, and the temperature of the element 13 becomes relatively low. As a result, a large temperature difference is produced between the contact surfaces of the element 13, and this makes it possible to generate a large electromotive power. By this power, a coil 29 is actuated, and rotary vane 22 rotates. Water within a bathtub 2 is sucked up into the vane 22 from a feed water tube 3 and is heated within a first heat exchange 1, and further the temperature of water is raised in a second heat exchanger 7, and hot water is supplied through a supply hot water tube 9. |
