| 摘要 |
PROBLEM TO BE SOLVED: To minimize pressure loss in a hot water/water mixing means, in a storage type hot water supply device including a hot water storage tank 1 connected to a water supply passage 4 at its bottom section and with a hot water tapping passage 5 at its top section, a tank water circulation passage 2 for circulating tank water from the bottom section to the top section of the hot water storage tank, and a heating device 3 for heating the tank water flowing to the tank water circulation passage, and further including the hot water/water mixing means 7 for controlling a mixing ratio of warm water tapped from the hot water storage tank through the hot water tapping passage and cold water supplied through a branched water supply passage 4c branched from the water supply passage 4. SOLUTION: The hot water/water mixing means 7 is composed of a first flow control valve 71 disposed in the hot water tapping passage 5, and a second flow control valve 72 disposed in the branched water supply passage 4c. Pipe conduit resistance of a part of the hot water tapping passage from the first flow control valve 71 to a joining section of the hot water tapping passage 5 and the branched water supply passage 4c is equal to that of a part of the branched water supply passage from the second flow control valve to the joining section. COPYRIGHT: (C)2011,JPO&INPIT |
