| 摘要 |
PURPOSE:To reduce energy loss caused by the movements of an ice making part and an ice storage part when both are different and by ice melting, and satisfy all conditions for prevailing an ice storage/cooling system by freezing water in a storage/cooling fluid part by dropping the same onto the heat transfer surface of a heat exchanger part of a water flowing-down type heat exchanger in the case of an ice making mode, and sending water in a return water storage part to a water/heat exchanger for cooling of the same in the case of a cold water cooling mode and simultaneously heating ice frozen on the heat transfer surface of the water flowing-down type heat exchanger part to drop the same into a tank. CONSTITUTION:Upon ice making, a refrigerant flows into a water flowing-down heat exchanger 7 and is chilled with water sprinkled from a sprinkler device 9 by a pump 6 to freeze a heat transfer surface of the water flowing-down type heat exchanger part 7. Thereafter, the operation is changed over to a cooling/water cooling mode, whereby water sucked into a cold water pump 4 is chilled by water heat exchangers 16, 17 and returned again to a tank intermediate temperature part 15 through pipings 18, 19. The refrigerant reduced in pressure by an expansion valve 46 is heated by an upstream water heat exchanger 16 and hence evaporated, and further chilled by the ice frozen in the water flowing-down heat exchanger 7 with part thereof being condensed. On the other hand, the ice frozen on the heat transfer surface of the water flowing-down heat exchanger 7 is heated and dropped onto a cold fluid tank part 20. |
