AIR CONDITIONING MACHINE |
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| 申请号 | US15576207 | 申请日 | 2016-06-29 | 公开(公告)号 | US20180142931A1 | 公开(公告)日 | 2018-05-24 |
| 申请人 | DAIKIN INDUSTRIES, LTD.; | 发明人 | Motoki TAKAGI; | ||||
| 摘要 | An air conditioning machine is provided by which a refrigerant collected into an outdoor heat exchanger can be suppressed from counter-flowing through a discharge hole of a compressor toward a side of an indoor heat exchanger in a refrigerant circuit after an end of a pump down operation. The air conditioning machine includes a refrigerant circuit, a refrigerant leakage sensing unit that senses leakage of the flammable refrigerant from the refrigerant circuit, and a pump down operation control unit that carries out the pump down operation for accumulating the flammable refrigerant in the outdoor heat exchanger in the refrigerant circuit when the refrigerant leakage sensing unit senses the leakage of the flammable refrigerant. The compressor includes a cylinder chamber, a compression member that is placed in the cylinder chamber and that compresses the flammable refrigerant, and a discharge hole through which the flammable refrigerant compressed in the cylinder chamber is discharged. At the end of the pump down operation, the pump down operation control unit controls the compressor so that the compression member stops at a position where the compression member overlaps at least a portion of the discharge hole when viewed in an axial direction of the cylinder chamber. | ||||||
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