HOT WATER SUPPLY DEVICE

摘要

PURPOSE:To increase the performance coefficient of a heat collecting operation to save energies and to achieve miniaturization of the apparatus by providing a water forced flow portion within a hot water storage tank and hermetically arranging a heat transfer tube on the outer wall of the hot water storage tank. CONSTITUTION:Heat carried by a heat source fluid flowing through a heat transfer tube 12 on the power supply side is transmitted through a wall surface of a heat storage tank 10 to a water inside the tank 10. In this case, water is ejected substantially horizontally in the circumferential direction from an opening portion 18 of a discharge tube 15 by the operation of a circulating pump 14, and heated and increased in its temperature while turning along the inner wall 10b of a hot water storage tank, thus moving upwardly. Then, water is sucked up into a suction tube 13 opening at the upper part of a heat exchange part 11 and circulates, and the temperature of the entire water within the hot water storage tank 10 is increased. Thus, by the flow of water the heat transfer on the water side is improved and the heat exchanger can be miniaturized. Further, since the heat exchange part 11 is constituted by winding a heat transfer tube 12 around the outer wall of the hot water storage tank 10, the apparatus can be made compact and further since water and the heat source fluid are heat exchanged with each other through a double wall surface consisting of the wall surface of the hot water storage tank 10 and the wall surface of the heat transfer tube 12, the apparatus has a safe structure for the prevention of mixing of water with the heat source side fluid.