| 摘要 |
PROBLEM TO BE SOLVED: To implement optimal injection even when a resisting value of a pressure reducer is changed by individual difference of a pressure reduction adjusting means and accumulation of dusts, in an air conditioner wherein a refrigerant is injected from a gas-liquid separator 4 to a refrigerant outlet portion of a lower stage-side compressing portion 1b of a compressor 1, and controlling the injection by a pressure reducing means on a downstream side of the gas-liquid separator 4. SOLUTION: The pressure reduction by the pressure reducing means 3, 5 on the downstream side of the gas-liquid separator 4 are determined on the basis of the difference between a lower stage-side compressing portion discharge temperature 8 and a higher stage-side compressing portion suction temperature 7 of a two-stage compressor 1 having the lower stage-side compressing portion 1b and the higher stage-side compressing portion 1a. COPYRIGHT: (C)2006,JPO&NCIPI
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