| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage type hot water supply device free from a connection port for a pressure relief valve on a top section of a hot water storage tank, and preventing opening of the pressure relief valve due to water hammer phenomenon, with respect to the storage type hot water supply device including the 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 the 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 includes the pressure relief valve 9 opened when a pressure in the hot water storage tank reaches a prescribed value or more. SOLUTION: The pressure relief valve 9 is connected to the tank water circulation passage 2 in a state of being positioned at the end at a top section side, of the hot water storage tank 1. A return port 1b connected with the tank water circulation passage 2 is formed on a semispherical end plate 1a of the top section of the hot water storage tank 1 at a highest part of the end plate 1a, and a tap port 1 connected with the hot water tapping passage 5 is formed at a lower part with respect to the return port 1b. COPYRIGHT: (C)2011,JPO&INPIT |
