| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of a refrigerant conveyance pump by controlling a plurality of the different capability refrigerant conveyance pumps such that operation frequencies thereof are uniform in an air conditioner comprising a heat source side refrigeration cycle and a utilization side refrigeration cycle without losing comfortability of an indoor environment in the utilization side freezing cycle. SOLUTION: There are provided pump control means PCNT where operation interruption control for a plurality of different capacity refrigerant conveyance pumps is performed in conformity with the degree of refrigerant superheating of an indoor unit outlet assembly pipe of a utilization side refrigeration cycle, and first bypass opening calculation means 15 for calculating an opening where a flow rate is properly set by a first bypass flow rate valve BP1. Hereby, operation frequency of the refrigerant conveyance pump is made uniform without destroying the balance of the utilization side refrigeration cycle, and the system is continuously operated without hindrance of comfortability of an indoor environment. |
