IMMEDIATE HOT WATER TAPPING TYPE WATER HEATER

PROBLEM TO BE SOLVED: To provide an immediate hot water tapping type water heater of a dream pipe system having simple structure and easy construction. SOLUTION: A heat exchanger 24 in a water heater 21 and a tapping terminal 22 with an accumulator 32 are connected to each other via a water supply pipe. A piston deice 30 is provided on the upstream side of the water supply pipe beyond the heat exchanger 24 and a water solenoid valve 31 is provided on the upstream side of the water supply pipe beyond the piston device 30. During tapping, the accumulator 32 of a low pressure type rests at normal water pressure where it is in a critical condition at its operation side with the regular water pressure applied thereto, and the piston device 30 is stopped in a pressure-applied condition. In immediate tapping operation when the water solenoid valve 31 is closed and the piston device is driven, water is pulsated between the piston device 30 and the accumulator 32 and heat is transported from the heat exchanger 24 to the side of the accumulator 32. COPYRIGHT: (C)2006,JPO&NCIPI