| 摘要 |
PROBLEM TO BE SOLVED: To provide an air-conditioning apparatus and its control method for improvement of cooling efficiency and comfortableness by using a constant capacity compressor. SOLUTION: In a first cooling-circuit, a refrigerant is passed through a constant capacity compressor 18, an outdoor heat exchanger 21, an ice thermal- storage tank 36 to an indoor exchanger 24. In a second cooling circuit, the refrigerant is passed to the indoor heat exchanger 24 by bypassing the tank 36. The air-conditioning apparatus comprises further a motorized expansion valve 38 controlling a flow-rate of the refrigerant flowing in the first and second cooling circuits, and a control means regulating travel of the valve 38 in accordance with a cooling load.
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