Patent ID: 7299648
Filing Date: 2007-11-27
Classification: F25B

Abstract:
1. A refrigeration system of an air conditioning apparatus to cool or heat air within a space by using phase change of refrigerant, the refrigeration system comprising: an expansion unit to execute adiabatic expansion of refrigerant; an indoor unit with a heat exchanger; a compressor to execute adiabatic compression of the refrigerant; an outdoor unit with a heat exchanger; and a bypass line connected between an inlet and an outlet of the compressor to bypass at least a part of the refrigerant discharged from the outlet of the compressor to the inlet of the compressor, when a pressure of the discharged refrigerant is lower than a preset level or the temperature of outside air of the compressor is lower than a preset level, wherein refrigerant condensed in the indoor unit or the outdoor unit is introduced into the expansion unit through a plurality of auxiliary evaporators which are connected to each other in series or in parallel with respect to the flow of the refrigerant for heat exchange.