| 摘要 |
PURPOSE: An air conditioning system is provided to enhance the heating operation efficiency in a low-temperature operation condition. CONSTITUTION: An air conditioning system includes a compressor(11), an expansion device(14), an indoor heat exchanger(21), an outdoor heat exchanger(12), and plural refrigerant pipes(31,32,33,34) connecting the compressor, expansion device, the indoor heat exchanger, and the outdoor heat exchanger with a closed circuit. A heat recovery device(40) recovering heat remaining in a refrigerant moving to the expansion device side from the indoor heat exchanger is installed in the middle of the refrigerant pipe connecting the indoor heat exchanger and the expansion device.
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