| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump type hot water supplier to improve operation efficiency and effectively utilize hot water capacity of a hot water storage tank. SOLUTION: The heat pump type hot water supplier comprises a flow rate control means 10 for controlling the opening of a flow rate regulating valve 11 so that a boiling-up outlet water temperature at the water side of a refrigerant to water heat exchanger 2 is kept at a constant value; a means 13 for detecting the condition immediately before completion of boiling-up to detect right before boiling-up of the whole of the hot water storage tank 5; and a control means 12 to effect control such that the number of revolutions of a compressor is decreased when a signal from the means 13 is changed into a given signal. Since, in the case of boiling-up completion approaching and the discharge pressure of the compressor 1 being increased, control is effected such that the number of revolutions of the compressor is decreased, hot water supplying/heating operation is practicable to a high water supply temperature, hot water capacity of the hot water storage tank 5 can be effectively utilized, and further hot water supplying/heating operation excellent in efficiency is practicable. |
