| 摘要 |
PURPOSE:To enable to effect a defrosting operation effectively be a method wherein a cold insulating agent is enabled to be heated by an auxiliary heat source when the temperature of the cold insulating agent is below a set temperature for the cold insulating upon the defrosting operation under room heating operation in the air conditioner having a cold insulating tank in the refrigerating cycle thereof. CONSTITUTION:The closed circuit refrigerating cycle is constituted by connecting a compressor 1, a four-way valve 2, an indoor side heat exchanger 3, a pressure reducing mechanism 5, an outdoor side heat exchanger 6 and the like sequentially, while the cold insulating tank 11, for accumulating cold in the refrigerating cycle, is equipped in the cycle. The cold insulating tank 11 is connected to a refrigerant medium piping through a bypass circuit 8 detouring the pressure reducing mechanism 5, while it is also connected to the refrigerant medium piping at the outlet side of the outdoor side heat exchanger 6 upon room heating through the bypass circuit 16 detouring a solenoid valve 7. Further, the auxiliary heat source 11b, heating the cold insulating agent 11a upon the defrosting operation under the room heating operation when an atmos pheric temperature is lower than a set temperature and the temperature of the cold insulating agent 11a in the tank 11 is lower than the set temperature of the cold insulation, is provided to enable to rise the temperature of the cold insulating agnet 11a to a temperature higher than a preset one. |
