| 摘要 |
PROBLEM TO BE SOLVED: To provide efficient air-conditioning apparatus capable of suppressing reduction in efficiency of a compressor, even if a coolant with small refrigerating capacity per unit volume compared with an R410A coolant, as well as reducing pressure loss of an outdoor heat exchanger, an indoor heat exchanger, and connection pipes.SOLUTION: In a refrigerating device, the compressor 1, an evaporator, a throttle device 4, and a condenser are connected in series by the connection pipes 21, 22 to compose a circular coolant circuit. The coolant with the small refrigerating capacity per unit volume compared with the R410A coolant is used as a coolant enclosed in the coolant circuit. A cylinder volume of the compressor 1 is set to be larger than a cylinder volume at the time of using the R410A coolant. A passing area of the connection pipe 22 in which gas coolant flows is set to be larger than a passing area of the connection pipe 22 in which the gas coolant flows at the time of using the R410A coolant. |
