JP2005345075A5 - - Google Patents

Claims (4)

A hot water storage tank that heats the internal water by heating means and stores it as hot water, a water supply pipe that supplies water from the water source to the hot water storage tank, a hot water supply pipe that sends hot water stored in the hot water storage tank, and a branch from the water supply pipe The water supply branch pipe that sends water to the hot water pipe, the mixing valve that mixes the water in the water supply branch pipe and the hot water in the hot water pipe, the mixed hot water pipe that sends the mixed hot water from the mixing valve to the bathtub, and the mixed hot water pipe An open / close valve for supplying and stopping the mixed hot water, a tank circulation circuit for taking out the hot water stored in the hot water storage tank, circulating it back to the hot water storage tank, and a tank circulation circuit. A tank circulation pump that circulates the bath water, a bathtub water circulation circuit that takes out the bathtub water from the bathtub, circulates it back to the bathtub, a bathtub water circulation pump that is provided in the bathtub water circulation circuit and circulates the bathtub water in the bathtub, and a tank circulation circuit. Flowing hot water A heat exchanger for heat exchange between the bath water flowing through the bath water circulation circuit, heating means, a tank circulation pump, bath water circulating pump, the hot water storage type water heater and a control unit for controlling the mixing valve and on-off valve,
The hot water storage type hot water supply apparatus, wherein the mixed hot water supply pipe is provided with a flow rate measuring means for measuring a predetermined flow rate of the mixed hot water flowing through the mixed hot water supply pipe . Wherein the control unit opens the on-off valve before circulation operation during the heat exchange operation with the bathtub water, according to claim 1, wherein the closing the on-off valve on the basis of a measurement signal of the flow rate measuring means Hot water storage water heater. The mixed hot water supply pipe, hot water storage type water heater according to claim 1, further comprising a water passage detection means for detecting that the flow predetermined time mixing hot water into the mixing hot water supply pipe is continuous. Wherein the control unit opens the on-off valve before circulation operation during the heat exchange operation with the bathtub water, according to claim 3, wherein the closing the on-off valve based on a detection signal of the water flow detection means Hot water storage water heater.