| 摘要 |
PURPOSE: An air conditioner is provided to simplify a device without an outdoor air supply device for condensing refrigerant by using refrigerant with low temperature and low pressure passing through a second expansion valve. CONSTITUTION: An air conditioner comprises a compressive unit(10), a condensing unit(20), a first expansion valve(30), an evaporation unit(40), a refrigerant circulating pipe(50), a branch pipe(60), and a second expansion valve(70). The compressive unit sucks refrigerant of the gas phase and compresses to high temperature and high pressure. The condensing unit condenses the compressed refrigerant of high temperature and high pressure. The first expansion valve decompresses the condensed refrigerant. The evaporation unit evaporates the decompressed refrigerant of low temperature and low pressure. The refrigerant circulating pipe successively connects the compressive unit, the condensing unit, the first expansion valve, and the evaporation unit. The branch pipe comprises a refrigerant supply line(61) and a refrigerant discharge line(62). The second expansion valve is connected to the supply line of the branch pipe and decompresses the condensed refrigerant by the condensing unit.
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