| 摘要 |
<p>PROBLEM TO BE SOLVED: To supply hot water to both a general hot water tap and a business use dish washer by using a single water heater, while surely operating the business use dish washer, in compliance with sanitary standards. SOLUTION: A hot water discharge pipe 23, for heating inflow water from an inflow pipe 22 connected directly to a city water pipe and discharging hot water, is branched into a general hot water supply pipe 4 for supplying the hot water to the general hot water tap 3 via a hot water discharge flow rate regulating valve 43 and a supply circulation passage 5a for supplying the hot water to the dish washer 6. Whether the dish washer is in operation or out of operation, if the interior of a hot water tank 63 is in a temperature preserving operation by using the circulation passage 5 for dish washing, hot water is supplied to the general hot water tap 3 after effecting mixture with water from a bypass pipe 24 at a mixing section 41 to control water temperature to a set hot water supply temperature set by a remote controller 71 for effecting a hot water supply priority control. When the dish washer is in operation for supplying hot water to the hot water tank 63 and particularly in a rinsing operation from a rinsing nozzle, the greater part of the high temperature hot water from the heat exchanger is made to flow to the supply circulation pipe 5a side in a restricted state by restricting the opening of a hot water discharge flow rate control valve, and is supplied to the rinsing nozzle 68 through a solenoid on/off valve 66 which is actuated to open and a supply pipe 65 for effecting rinsing priority control.</p> |
