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公开(公告)号：US20180142931A1
公开(公告)日：2018-05-24
申请号：US15576207
申请日：2016-06-29
发明人： Motoki TAKAGI
CPC分类号： F25B49/022 , F24F11/36 , F25B1/04 , F25B9/004 , F25B13/00 , F25B41/04 , F25B49/005 , F25B49/02 , F25B2400/12 , F25B2500/222 , F25B2600/2519
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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公开(公告)号：US20200166233A1
公开(公告)日：2020-05-28
申请号：US16621850
申请日：2018-07-26
发明人： Motoki TAKAGI
IPC分类号： F24F11/46 , F24F11/49 , F24F11/58 , F24F11/59 , F24F11/64 , F24F11/65 , F24F11/74 , F24F11/80 , F24F11/86 , G05B15/02
摘要： Provided is an air conditioner that can sufficiently increase a temperature of hot air when receiving a request for high-temperature air that temporarily increases the temperature of the hot air to be blown out. A refrigerant circuit has a first refrigerant path to which a compressor, a first utilization-side heat exchanger (121), a first expansion valve (131), and a heat source-side heat exchanger are connected in order. A control unit controls the compressor and the first expansion valve (131). When the control unit receives the request for high-temperature air that temporarily increases the temperature of the hot air blown out through the first utilization-side heat exchanger (121), the control unit changes the control of the first expansion valve (131) so that the temperature of a refrigerant that flows through the first utilization-side heat exchanger (121) increases.
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