| 摘要 |
PURPOSE:To enhance coldness heat-accumulating efficiency, by a method wherein a cooler is provided in a coldness heat-accumulating water tank, and the temperature of a refrigerant supplied is repeatedly changed over between an ice- making temperature and a defreezing temperature, in a coldness heat-accumulating water tank for heat-pump air conditioning with water used as a heat source. CONSTITUTION:When supplying a refrigerant to the cooler 2 by a pump 11, three-way valves 7, 8 are changed over to cyclically provide a low-temperature refrigerant circuit and a high-temperature refrigerant circuit with a predetermined period, wherein the low-temperature refrigerant circuit is comprised of a low- temperature refrigerant tank 3 pipes (a), (b) the cooler 2 pipes (c), (d) a high-temperature refrigerant tank 4, while the high-temperature refrigerant circuit is comprised of the tank 4 pipes (e), (b) the cooler 2 pipes (c), (f) the tank 3. With this constitution, freezing and defreezing take place repeatedly on the surface of the cooler 2, so that ice is released from the cooler 2 and is floated in cooling water. Accordingly, the cold heat-accumulating efficiency can be enhanced. |
