HOT WATER PRODUCING DEVICE

摘要

PURPOSE:To provide a hot water producing device which is constituted to increase an amount of hot water fed to a user and eliminate a fear of an excessive load being exerted on a pump device and reduce incurring of a heat loss. CONSTITUTION:Water in a tank 1 to which cold water C is fed is discharged by a pump device 4 and water delivered from the pump device 4 is recovered to the tank 1 through a circulation passage 5. A mixer 6 is arranged in a position situated downstream from the pump device 4 in the circulation passage 5. By inputting hot water to the mixer 6 and blowing steam S in an air bubble state in hot water, the temperature of hot water is increased. Hot water which is heated, is taken out of a user piping 12 branched from the circulation passage 5. A recovery pipe 14 arranged downward from a take-out part 5b of the user piping 12 of the circulation passage 5 has a flow passage narrower than other part of the circulation passage 5. This constitution suppresses a flow rate of hot water H recovered in the tank 1 and provides a sufficient amount of hot water fed to the user side.