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公开(公告)号：EP4372295A1
公开(公告)日：2024-05-22
申请号：EP21950181.4
申请日：2021-07-15
发明人： NAKAJIMA, Komei
摘要： An air-conditioning apparatus includes a compressor, a condenser, a pressure-reducing device, an evaporator, a temperature sensor, and a controller. The controller controls the compressor and the pressure-reducing device to cause a heating operation or a cooling operation to be performed. The controller causes an intermittent operation to be performed, the intermittent operation being an operation in which an operation of the compressor is stopped when a cooling load or a heating load decreases and the operation of the compressor is started when the cooling load or the heating load increases. The controller causes, when the operation of the compressor is performed in the intermittent operation, the intermittent operation to be performed at a lowest frequency set as a lower-limit frequency in a frequency range that is set for the operation of the compressor. The controller has: a first determination value obtained by multiplying by a preset first constant set, a time constant which is a response value required until heating and cooling capacity in refrigerant circulation in a refrigeration cycle circuit is stabilized, and which is a value at a rise of a waveform representing the heating and cooling capacity calculated from a value measured by the temperature sensor; and a second determination value obtained by multiplying the time constant by a preset second constant smaller than the first constant. The controller increases the lowest frequency for a subsequent operation of the compressor, when in the intermittent operation, an intermittent operation time from the start to stop of the compressor is longer than the first determination value, and deceases the lowest frequency for the above subsequent operation, when in the intermittent operation, the intermittent operation time is shorter than the second determination value.
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公开(公告)号：EP3517855B1
公开(公告)日：2020-09-16
申请号：EP16916807.7
申请日：2016-09-23
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公开(公告)号：EP3614070A1
公开(公告)日：2020-02-26
申请号：EP17906045.4
申请日：2017-04-18
摘要： An air-conditioning apparatus includes a refrigerant circuit including a first load-side heat exchanger and a second load-side heat exchanger, a first flow switching unit located upstream of the second load-side heat exchanger, and a second flow switching unit located downstream of the second load-side heat exchanger, wherein the first flow switching unit is configured to be switched between a first state in which refrigerant communication between a compressor and the second load-side heat exchanger is blocked and a second state in which the compressor is in refrigerant communication with the first load-side heat exchanger and the second load-side heat exchanger, and the second flow switching unit is configured to be switched between a third state in which refrigerant communication between the second load-side heat exchanger and a heat-source-side heat exchanger is blocked and a fourth state in which the first load-side heat exchanger is in refrigerant communication with the second load-side heat exchanger and the heat-source-side heat exchanger.
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公开(公告)号：EP4321820A1
公开(公告)日：2024-02-14
申请号：EP21936008.8
申请日：2021-04-07
发明人： NAKAJIMA, Komei , ADACHI, Yusuke
摘要： An air-conditioner (100) is provided with a refrigerant circuit (RC) and an indoor fan (10). The refrigerant circuit (RC) has a compressor (1), a first four-way valve (2), an outdoor heat exchanger (3), a first expansion valve (4), a second four-way valve (5), a third four-way valve (6), an indoor heat exchanger (7), and a second expansion valve (8), and is configured to circulate refrigerant. The indoor fan (10) is configured to send air to the indoor heat exchanger (7). The indoor heat exchanger (7) has a first heat exchange portion (7a) and a second heat exchange portion (7b). During a cooling operation, in the first heat exchange portion (7a) and the second heat exchange portion (7b), a flow of refrigerant with respect to a flow of air sent by the indoor fan (10) is a parallel flow. In a reheating dehumidification operation, in the first heat exchange portion (7a), the flow of refrigerant with respect to the flow of air is the parallel flow, and in the second heat exchange portion (7b), the flow of refrigerant with respect to the flow of air is a counterflow.
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公开(公告)号：EP3534088A1
公开(公告)日：2019-09-04
申请号：EP16920284.3
申请日：2016-10-28
摘要： An air conditioner (10) includes a refrigerant circuit (13) and refrigerant. The refrigerant circuit (13) has a compressor (1), a condenser (2), a pressure-regulating valve (3), and an evaporator (4). The refrigerant is R32. The pressure-regulating valve (3) includes a flow path (33) causing the refrigerant flowing from the condenser (2) to flow to the evaporator (4), a pressure reference chamber (S2) partitioned from the flow path (33) and filled with inert gas, and a valve portion (34) disposed in the flow path (33). The pressure-regulating valve (3) is configured to adjust a degree of opening of the valve portion (34) to adjust a flow rate of the refrigerant flowing through the flow path (33). The valve portion (34) is configured to increase the degree of opening when a pressure in the flow path (33) is higher than a pressure in the pressure reference chamber (S2), and reduce the degree of opening when the pressure in the flow path (33) is lower than the pressure in the pressure reference chamber (S2).
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公开(公告)号：EP4001716A1
公开(公告)日：2022-05-25
申请号：EP19937643.5
申请日：2019-07-16
发明人： NAKAJIMA, Komei , TASHIRO, Yusuke
IPC分类号： F16K11/065
摘要： A refrigeration cycle apparatus (10) includes a compressor (1), a four-way valve (2), a first outdoor heat exchanger (3), a first expansion valve (4), and an indoor heat exchanger (5). The four-way valve (2) includes a casing (21), a first flow channel, a second flow channel, a flow channel switching piston (23), and a wall portion (24). The flow channel switching piston (23) is configured to slide along an inner surface (IS) to switch between passing the refrigerant through the first flow channel and passing the refrigerant through the second flow channel. The wall portion (24) is configured to slide along the inner surface (IS) together with the flow channel switching piston (23) and is disposed with a space (SP) between the flow channel switching piston (23) and wall portion (24) to cover the flow channel switching piston (23).
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公开(公告)号：EP3951284A1
公开(公告)日：2022-02-09
申请号：EP19923242.2
申请日：2019-04-05
发明人： NAKAJIMA, Komei , WAKUTA, Naoki , TASHIRO, Yusuke
摘要： In a refrigeration cycle apparatus (100) according to the present disclosure, the circulation direction of refrigerant is switched between a first circulation direction and a second circulation direction opposite to the first circulation direction. The refrigeration cycle apparatus (100) includes a compressor (1), a first heat exchanger (4), a second heat exchanger (8), a third heat exchanger (6), a fourth heat exchanger (7), a first expansion valve (5A), and a second expansion valve (5B). The first circulation direction is a circulation direction in order of the compressor (1), the first heat exchanger (4), the first expansion valve (5A), the third heat exchanger (6), the fourth heat exchanger (7), the second expansion valve (5B), and the second heat exchanger (8). When a circulation direction of the refrigerant is the first circulation direction, the refrigerant from the third heat exchanger (6) exchanges heat with the refrigerant from the second heat exchanger (8) in the fourth heat exchanger (7). When a circulation direction of the refrigerant is the second circulation direction, the refrigerant from the fourth heat exchanger (7) exchanges heat with the refrigerant from the first heat exchanger (4) in the third heat exchanger (6).
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公开(公告)号：EP3819555A1
公开(公告)日：2021-05-12
申请号：EP18925288.5
申请日：2018-07-05
发明人： NAKAJIMA, Komei
摘要： An air conditioner (1) includes a refrigerant circuit in which a compressor (10), an outdoor heat exchanger (30), an expansion valve (40), and an indoor heat exchanger (50) are connected in a loop by refrigerant pipes. During cooling operation, the outdoor heat exchanger (30) and the indoor heat exchanger (50) function respectively as a condenser and an evaporator. The outdoor heat exchanger (30) includes a main heat exchanger (32), a subcooling heat exchanger (34), and a bypass circuit. The subcooling heat exchanger (34) is configured to allow refrigerant from the main heat exchanger (32) to flow through the subcooling heat exchanger (34). The bypass circuit is configured to cause the refrigerant to make a detour from the subcooling heat exchanger (34) to an exit side of the outdoor heat exchanger (30).
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公开(公告)号：EP3640550A1
公开(公告)日：2020-04-22
申请号：EP17913226.1
申请日：2017-06-12
摘要： An outdoor unit includes a casing including an air passage, an outdoor fan disposed in the air passage, a compressor disposed in the casing, an outdoor heat exchanger disposed in the casing and including fins and a heat transfer tube connected to the fins, a control board disposed in the casing and including a control unit that controls the compressor, and a heat sink disposed in the air passage in the casing and being in contact with the control board. The heat transfer tube of the outdoor heat exchanger includes a first region in which gas refrigerant or two-phase gas-liquid refrigerant flows when the outdoor heat exchanger is used as a condenser and a second region that is located downstream of the first region in a refrigerant flow direction and in which single-phase liquid refrigerant flows. The heat sink is disposed downstream of the outdoor heat exchanger in an air flow direction in the air passage. The heat sink is located at a first distance from the first region and is located at a second distance from the second region. The second distance is shorter than the first distance.
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公开(公告)号：EP4269897A1
公开(公告)日：2023-11-01
申请号：EP20968015.6
申请日：2020-12-28
发明人： NAKAJIMA, Komei , ADACHI, Yusuke
IPC分类号： F24F11/86 , F24F110/20 , F24F1/0063 , F24F1/0068
摘要： An air-conditioner (1) includes an outdoor unit (2) and an indoor unit (3). The indoor unit includes a first connection port (121) connected to the outdoor unit and configured such that refrigerant flows therethrough, a second connection port (122) connected to the outdoor unit and configured such that refrigerant flows therethrough, a first path (92 to 94) provided between the first connection port and the second connection port, a second path (95 to 97) provided between the first connection port and the second connection port in parallel to the first path, a first indoor heat exchanger (71) provided in the first path, a first expansion valve (42) provided in the first path between the first indoor heat exchanger and the second connection port, a second indoor heat exchanger (72) provided in the second path, and a second expansion valve (43) provided in the second path between the second indoor heat exchanger and the first connection port. The first indoor heat exchanger is located on a windward side in a direction of flow of air taken into the indoor unit. The second indoor heat exchanger is located on a leeward side in the direction of flow of air taken into the indoor unit.
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