| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner capable of assuring a delivery capacity of a refrigerant pump even if a head difference is found between it and an indoor side heat exchanger. SOLUTION: A compressor 34 driven by an engine 33, an indoor heat exchanger 18, an outdoor heat exchanger 31 and a four-way valve 32 are connected to each other through a refrigerant pipe passage 14. A branch pipe passage 42 having its one end communicated with a high pressure liquid pipe 40 during a heating operation of the refrigerant pipe passage 14 and further having the other end communicated with a high pressure gas pipe 39 is comprised of a refrigerant pump 44, an opening and closing valve 45 and an engine waste heat recovering heat exchanger 46. An upstream side of either the high pressure liquid pipe 40 or the branch pipe 42 than the refrigerant pump 44 during a heating operation is provided with a cooling means 54 for cooling and liquefying the refrigerant.
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