| 摘要 |
PURPOSE:To provide both simplicity in the structure and an operation of a heat exchanger and an improve thermal effieiency by a method wherein hot water in a hot water boiler is applied as a heat applying medium in the heat exchanger and a hot water in the bath tub is applied as a heat receiving medium and the hot water in the bath tub is increased. CONSTITUTION:Hot water of about 76 deg.C which is sent out from a hot water boiler 2 into a heat exchanger 4 through a flow rate control valve 5, a circuilation pump 6 and a hot water feeding pipe 8 heats up hot water of about 39 deg.C flowed from the bath tub into the heat exchanger 4 thorugh the first hot water feeding hole 10 to a temperature of about 42 deg.C which is preferable for taking bath, circulated back to the hot water boiler 2 as the hot water of about 54 deg.C through the hot water pipe 9, then heated again to the desired temperature and acts as a circulation heating medium. The hor water circulated back to the hot water feeding boiler 2 is flowed in the coiled tube 12 in the heat exchanger 4, so that it may not be mixed with the hot water flowing into the bath tub 3 out of the coiled tube and thus the hot water may act always as a pure thermal medium. |
