HEAT EXCHANGE TYPE SOLAR HEAT WATER HEATER

摘要

PURPOSE:To easily obtain hot water for drinking by fitting a heat exchanger within a heat-insulating tank of a solar heat water heater, and circulating clean water from the external part to a heat exchanger to be heat-exchanged with hot water within the heat-insulating tank. CONSTITUTION:A supply water valve 14a of a supply water pipe 7 is opened and water is supplied through a supply water port 6 into a heat insulating tank. Water is then allowed to flow into a heat collector 1, and solar heat energies are absorbed and water is allowed to counterflow successively into the heat insulating tank 4. When a hot water supply valve 14b of a hot water supply pipe 11 connected to a heat exchanger 5 internally fitted in the heat insulating tank 4 is opened and a tap for supplying hot water is also opened, the heat of hot water within the heat insulating tank 4 is heat-exchanged with water allowed to flow into a heat exchanger 5 from a branch pipe 8 via a flow rate adjusting valve 9, and clean hot water is supplied. The flow rate is adjusted by the flow rate adjusting valve 9 communicating with a branch pipe 8 to increase the heat exchange ratio. Accordingly, since hot water circulated within the heat exchanger 5 and heat exchanged is made clean, it can be immediately utilized as hot water for drinking, and in respective homes hot water for drinking can be obtained at low cost by utilizing solar heat.