| 摘要 |
PROBLEM TO BE SOLVED: To improve heat efficiency of a heat radiator without increasing the pressure loss of air. SOLUTION: This air conditioner is provided with: a flow rate control means 3 for controlling the flow rate of a carbon dioxide refrigerant; an evaporator 4 for evaporating the carbon dioxide refrigerant; a compressor 1 for compressing the evaporated carbon dioxide refrigerant; a first heat exchanger 2A composed by arranging heat transfer tubes for passing the carbon dioxide refrigerant therethrough in a predetermined number of fin plates; a second heat exchanger 2B composed by similarly arranging heat transfer tubes for passing the carbon dioxide refrigerant therethrough in a predetermined number of fin plates; and a blower 5 for supplying air to the first heat exchanger 2A and the second heat exchanger 2B. The air supplied from the flower 5 passes through the second heat exchanger 2B and thereafter flows into the first heat exchanger 2A, and the carbon dioxide refrigerant compressed by the compressor 1 is rapidly lowered in temperature while passing through the first heat exchanger 2A and flows into the second heat exchanger 2B after the lowering amount of the temperature is lowered. COPYRIGHT: (C)2007,JPO&INPIT
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