| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for increasing a percentage of water heated by a heat pump unit in hot water filling water.SOLUTION: A hot water filling system 1 includes: a heat pump unit 20; a tank 11; a bathtub water supply passage for supplying water in the tank 11 to a bathtub 100; a supply amount control valve 36 for controlling supply amount in the bathtub water supply passage; and a tank water supply passage 13 for supplying water to the tank 11. The hot water filling system 1 further includes: a thermistor 11a for detecting a temperature of the tank 11; and a gas heat source machine unit 30 for heating water to be supplied from the tank 11 to the bathtub 100. The hot water filling system includes an energy saving mode of heating water in the tank 11 with the heat pump unit 20 and making an opening of the supply amount control valve 36 smaller than a full opening to supply water to the bathtub during a hot water filling operation for supplying water to the bathtub 100 until the water reaches hot water filling set amount. During the hot water filling operation, in accordance with the temperature of the thermistor 11a, the gas heat source machine unit 30 is started.SELECTED DRAWING: Figure 1 |
