| 摘要 |
A refrigeration system of air conditioning apparatuses with a bypass line between the inlet and outlet of a compressor. The refrigeration system ( 1 ) has an expansion unit ( 10 ) to execute adiabatic expansion of refrigerant, an indoor unit ( 20 ) with a heat exchanger, a compressor ( 30 ) to execute adiabatic compression of the refrigerant, and an outdoor unit ( 40 ) with a heat exchanger, and is operated to cool or heat air within a space to a desired level by using the phase change of the refrigerant. The refrigeration system also has a bypass line ( 99 ) between the inlet and outlet of the compressor ( 30 ) to bypass at least a part of the output refrigerant from the outlet to the inlet of the compressor when the pressure of the output refrigerant is lower than a reference level or the temperature of the air outside the compressor is lower than a reference level.
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