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公开(公告)号：US20170350623A1
公开(公告)日：2017-12-07
申请号：US15538118
申请日：2015-11-12
发明人： HIROAKI NAKAI , ATSUSHI SAKUDA
CPC分类号： F25B1/10 , F04C18/356 , F04C23/001 , F04C23/003 , F04C23/008 , F04C28/02 , F04C29/0014 , F04C29/12 , F04C2240/806 , F25B1/04 , F25B49/025 , F25B2341/0662 , F25B2400/074 , F25B2400/13 , F25B2400/23 , F25B2500/31 , F25B2600/021 , Y02B30/741
摘要： A refrigeration cycle device according to the present invention includes a compressor having a first compression chamber and a second compression chamber, a condenser, a decompressor, an evaporator, an injection path configured to introduce intermediate pressure refrigerant, a communication passage configured to introduce intermediate pressure refrigerant compressed in the first compression chamber to the second compression chamber, and a switch element configured to selectively make the second compression chamber communicate with the evaporator or make the second compression chamber communicate with the communication passage. The injection path introduces the intermediate pressure refrigerant to the second compression chamber. Single-stage compressing operation is performed when the second compression chamber is communicated with the evaporator, and two-stage compressing operation is performed when the second compression chamber is communicated with the communication passage.
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公开(公告)号：US20180156217A1
公开(公告)日：2018-06-07
申请号：US15567558
申请日：2016-06-07
发明人： FUMINORI SAKIMA , AKIRA FUJITAKA , HIROAKI NAKAI , AKIHIRO KYOGOKU , HIDEAKI MATSUO , SHIGEHIRO SATO , KENJI TAKAICHI
摘要： The present invention includes a refrigeration cycle circuit that includes compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger that are connected to each other. A working fluid containing R1123 (1,1,2-trifluoroethylene) and R32 (difluoromethane) is used as a refrigerant sealed in the refrigeration cycle circuit, and an electric motor driving device that drives an electric motor of compressor includes a rotational speed estimator. The rotational speed estimator estimates rotational speed based on information on a detection value of an electric current input to the electric motor or a magnetic pole position of a rotor that constitutes the electric motor.
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公开(公告)号：US20170167487A1
公开(公告)日：2017-06-15
申请号：US15118857
申请日：2015-06-08
发明人： HIROAKI NAKAI , HIROFUMI YOSHIDA , SHINGO OYAGI , YU SHIOTANI , TSUYOSHI KARINO
IPC分类号： F04C18/356 , F04C23/00 , F04C29/00 , F04C18/44
CPC分类号： F04C18/3564 , F04C18/356 , F04C18/44 , F04C23/00 , F04C23/001 , F04C29/00 , F04C29/0057 , F04C2240/20 , F04C2240/60
摘要： A rotary compressor having two cylinders includes crankshaft having first eccentric portion and second eccentric portion connected to each other by connecting portion. The rotary compressor further includes two compressive elements that compress working fluid in cylinder as first piston inserted over first eccentric portion eccentrically rotates in accordance with rotation of crankshaft. Further, first piston inserted over first eccentric portion undergoes assembly by being inserted over first eccentric portion through second eccentric portion. Further, a releasing portion is provided at each of outer diameter portions of first eccentric portion and second eccentric portion.
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