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公开(公告)号：EP4438974A1
公开(公告)日：2024-10-02
申请号：EP21965632.9
申请日：2021-11-25
发明人： NAGATA, Ryuichi
IPC分类号： F25B1/00
CPC分类号： F25B1/00
摘要： An air conditioner (100) includes a refrigerant circuit in which a non-azeotropic refrigerant mixture circulates. The refrigerant circuit includes a compressor (1), a four-way valve (2), a first heat exchanger (3), a first expansion valve (4), and a second heat exchanger (5). The four-way valve is configured to switch between a first state in which the non-azeotropic refrigerant mixture flows sequentially through the compressor, the first heat exchanger, the first expansion valve, and the second heat exchanger, and a second state in which the non-azeotropic refrigerant mixture flows sequentially through the compressor, the second heat exchanger, the first expansion valve, and the first heat exchanger. The refrigerant circuit further includes a third heat exchanger (10) provided to allow heat exchange between the non-azeotropic refrigerant mixture flowing between the first heat exchanger and the first expansion valve or the non-azeotropic refrigerant mixture flowing between the first expansion valve and the second heat exchanger, and the non-azeotropic refrigerant mixture flowing between the four-way valve and a suction port of the compressor. The non-azeotropic refrigerant mixture is a two-refrigerant mixture of R32 and R1234yf. A mass fraction of R32 in the non-azeotropic refrigerant mixture is 30% by mass or more.
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公开(公告)号：EP3742082A1
公开(公告)日：2020-11-25
申请号：EP18901369.1
申请日：2018-01-18
摘要： An outdoor heat exchanger (11) includes: a main heat exchange area (101); a sub heat exchange area (201); and a connecting pipe (35A) and a connecting pipe (35C) interconnecting the main heat exchange area (101) and the sub heat exchange area (201). The main heat exchange area (101) has a main heat exchange channel (33A) and a main heat exchange channel (33C). The sub heat exchange area (201) has a sub heat exchange channel (34A), a sub heat exchange channel (34C), and a sub heat exchange channel (34D). The connecting pipe (35C) connects the sub heat exchange channel (34C) and the sub heat exchange channel (34D) to the main heat exchange channel (33C) while the sub heat exchange channels are joined together. The connecting pipe (35A) interconnects the sub heat exchange channel (34A) and the main heat exchange channel (33A).
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公开(公告)号：EP4235057A1
公开(公告)日：2023-08-30
申请号：EP20958665.0
申请日：2020-10-21
发明人： NAGATA, Ryuichi
摘要： A cold source unit (5) is connectable to an indoor heat exchanger (70) and is provided for a refrigerant circuit (4). The cold source unit (5) includes: a compressor (10); an outdoor heat exchanger (30) having a gas header (31); an oil return path through which refrigeration oil is returned from the gas header (31) to the compressor (10); an oil return adjusting unit (50) configured to adjust a flow rate of refrigeration oil flowing through the oil return path; and a controller (6) configured to control the refrigerant circuit (4). The controller (6) is configured to control the oil return adjusting unit (50) to prevent refrigeration oil from flowing through the oil return path when the compressor (10) is driven at a frequency equal to or higher than a threshold value, and control the oil return adjusting unit (50) to allow the refrigeration oil to flow through the oil return path when the compressor (10) is driven at a frequency lower than the threshold value.
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公开(公告)号：EP3822570A1
公开(公告)日：2021-05-19
申请号：EP18926091.2
申请日：2018-07-11
摘要： An object is to provide a heat exchanger, a heat exchanger unit, and a refrigeration cycle apparatus in which frost melt water is inhibited from reaching an upper surface of a header and the heat exchange performance and the reliability are improved. The invention includes: a plurality of heat transfer tubes arranged in parallel with each other; a fin connected to at least one of the plurality of heat transfer tubes; and a header having a header end surface being a surface along a direction in which the plurality of heat transfer tubes are arranged in parallel with each other, the header being connected to one end portions of the plurality of heat transfer tubes. The fin has a first portion including an edge facing the header and a second portion other than the first portion, the fin extending in a first direction crossing the direction in which the plurality of heat transfer tubes are arranged in parallel with each other, the first direction being perpendicular to a longitudinal tube axis of each of the plurality of heat transfer tubes. An end portion in the first direction of the first portion projects in the first direction relative to the header end surface, and an end portion in the first direction of the second portion is positioned closer in the first direction to the plurality of heat transfer tubes than the header end surface is.
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公开(公告)号：EP4296593A1
公开(公告)日：2023-12-27
申请号：EP21926490.0
申请日：2021-02-17
发明人： NAGATA, Ryuichi , TASHIRO, Yusuke
IPC分类号： F25B1/00
摘要： An air conditioning apparatus (1) includes a refrigerant circuit (150) and a controller (200). The refrigerant circuit (150) is configured to allow refrigerant to circulate through a compressor (10), a condenser (40, 20), an LEV (111), and an evaporator (20, 40). The LEV (111) has an opening degree variable from a lower limit opening degree to an upper limit opening degree. The controller (200) is configured to control the LEV (111) to alternately repeat a first opening degree (CvA) and a second opening degree (CvB) in a range of less than or equal to a quarter of the upper limit opening degree, the second opening degree (CvB) being smaller than the first opening degree (CvA).
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公开(公告)号：EP4187189A1
公开(公告)日：2023-05-31
申请号：EP20946479.1
申请日：2020-07-21
发明人： NAGATA, Ryuichi
摘要： The heat exchanger (10) includes: a plurality of fins (20) disposed, spaced apart from each other; and a plurality of heat transfer tubes (30) inserted in the plurality of fins. The plurality of heat transfer tubes have round profiles. The plurality of heat transfer tubes have outer circumferential surfaces in contact with the plurality of fins. The plurality of heat transfer tubes have outer diameters (D 0 ) of 5.4 mm or less. The plurality of fins and the heat transfer tubes are disposed so that ratios (tf/D 0 ) of thicknesses (tf) of the plurality of fins to the outer diameters (D 0 ) are 0.03 or greater.
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公开(公告)号：EP4089340A1
公开(公告)日：2022-11-16
申请号：EP20912913.9
申请日：2020-01-07
发明人： NAGATA, Ryuichi , SATO, Masanori , TASHIRO, Yusuke
IPC分类号： F24F11/74 , F24F11/75 , F24F11/80 , F24F11/89 , F24F110/10
摘要： An air-conditioning apparatus includes a casing provided with an air inlet through which air is sucked and an air outlet through which the air is blown out, a plurality of heat exchangers being connected in parallel, and causing heat exchange to be performed between the air sucked from the air inlet and refrigerant, a plurality of fans each sending the air to a corresponding one of the plurality of heat exchangers, and a controller configured to control the plurality of fans so that they have different rotational speeds.
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公开(公告)号：EP4361525A1
公开(公告)日：2024-05-01
申请号：EP21947037.4
申请日：2021-06-22
发明人： NAGATA, Ryuichi
IPC分类号： F25B1/00
CPC分类号： F25B1/00
摘要： A refrigeration cycle apparatus (1) includes a compressor (3), a four-way valve (7), an outdoor heat exchanger (9), an expansion valve (11), a gas-liquid separator (13), an indoor heat exchanger (15), and a refrigerant pipe (31) that connects these components. The gas-liquid separator (13) and a suction side of the compressor (3) are connected by a bypass pipe (17). The refrigerant pipe (31) includes a riser pipe (33), a curved pipe (35), and a down pipe (37) sequentially connected from an upstream side to a downstream side of a flow of refrigerant. The bypass pipe (17) is connected to the riser pipe (33) located upstream of the curved pipe (35).
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公开(公告)号：EP3951287A1
公开(公告)日：2022-02-09
申请号：EP19921695.3
申请日：2019-03-28
发明人： NAKAMURA, Shin , MAEDA, Tsuyoshi , YATSUYANAGI, Akira , MORITA, Atsushi , NAGATA, Ryuichi , HIGASHIIUE, Shinya , ISHIBASHI, Akira , MATSUI, Shigeyoshi , TAKAHASHI, Atsushi
摘要： An object is to provide a refrigeration cycle apparatus capable of reducing freezing in a lower part of a heat exchanger in which drainage water tends to accumulate and reducing an amount of refrigerant in a refrigerant circuit. The refrigeration cycle apparatus includes the refrigerant circuit 1 connecting, by refrigerant pipes, a compressor, a first expansion device, and a first heat exchanger configured to serve as evaporator during heating operation. The first heat exchanger is provided with a first heat exchange unit and a second heat exchange unit connected to the first heat exchange unit in series in the refrigerant circuit. The first expansion device is connected in parallel with the second heat exchange unit in the refrigerant circuit, and the second heat exchange unit is placed at a position lower than a position of the first heat exchange unit.
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公开(公告)号：EP3848650A1
公开(公告)日：2021-07-14
申请号：EP21159036.9
申请日：2017-08-03
发明人： HIGASHIIUE, Shinya , MAEDA, Tsuyoshi , ISHIBASHI, Akira , NAGATA, Ryuichi , HIHARA, Eiji , DANG, Chaobin , LI, Jiyang
摘要： Provided is a refrigerant distributor including: a first space forming portion having a first refrigerant port and a second refrigerant port; and a second space forming portion, which extends laterally from a lower part of the first space forming portion, and has a plurality of heat transfer pipe connecting portions. A gas-liquid refrigerant mixture flows into the first space forming portion through the first refrigerant port. Heat transfer pipes are connected at positions of the plurality of heat transfer pipe connecting portions in the second space forming portion.
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