| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner which can improve energy efficiency and heating capacity in a simultaneous operation of a heating operation and a defrosting operation by utilizing a main compressor.SOLUTION: By a first flow passage switching device A, one part of a refrigerant discharged from an injection type compressor 1 is allowed to pass through first bypass piping 21, and the temperature of the refrigerant is decreased by reducing pressure by a first bypass flow control valve, and then, out of a plurality of outdoor heat exchangers, the refrigerant is supplied to an outdoor heat exchanger 9b to be defrosted and the refrigerant is condensed while melting frost. By a second flow passage switching device B, one part of the refrigerant supplied to the outdoor heat exchanger 9b to be defrosted is allowed to flow into second bypass piping 31, and it is allowed to flow into the injection type compressor 1 from an injection port.SELECTED DRAWING: Figure 4 |
