| 摘要 |
PROBLEM TO BE SOLVED: To suppress a liquid refrigerant which becomes excess accumulating in a heat source side heat exchanger during a cold storage operation, in a heat storage type air conditioner in which a heat exchanger for heat storage is connected in parallel at a series connection portion between a utilization side heat exchanger and an expansion valve.SOLUTION: During a cold storage operation, a refrigerant is circulated between a heat source side heat exchanger (22) and a heat exchanger (37) for heat storage. At that time, an opening/closing valve (25) of a heat storage unit (50) is controlled for opening, and an expansion valve (26) connected in series to a utilization side heat exchanger (27) is controlled for closing. Therefore, during the cold storage operation time, a liquid refrigerant which becomes excess compared to the simple cooling operation time can be accumulated in a refrigeration pipeline (71a) whose piping length is long from the heat storage unit (50) to the expansion valve (26) of an indoor unit (20b).SELECTED DRAWING: Figure 4 |
