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公开(公告)号：EP4145067A1
公开(公告)日：2023-03-08
申请号：EP21795540.0
申请日：2021-03-17
发明人： IYOSHI, Yuuta , YAMANOI, Yoshiki , SAEKI, Kumiko
摘要： An outdoor unit 3 of an air conditioner 1 includes an outdoor control unit 31 having a first control mode and a second control mode different from each other as control modes of a refrigerant recovery operation for recovering a refrigerant of a refrigerant circuit 9. A flow rate of the refrigerant in the refrigerant circuit 9 in the first control mode is larger than a flow rate of the refrigerant in the refrigerant circuit 9 in the second control mode.
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公开(公告)号：EP4137757A1
公开(公告)日：2023-02-22
申请号：EP20931122.4
申请日：2020-12-08
发明人： IYOSHI, Yuuta , YAMANOI, Yoshiki , SAEKI, Kumiko
摘要： A valve opening circuit 5 mounted on a heat pump device having a valve on a refrigerant circuit includes a DC electric path 56 to which a DC voltage generated from an AC voltage for normal use is applied, a valve drive circuit 53 that opens and closes the valve by using the DC voltage of the DC electric path 56, a control unit 54 that acquires a control power source voltage based on the DC voltage of the DC electric path 56 and controls the valve drive circuit 53, and a power feed port 7 connected to the DC electric path 56 and connectable to a DC power source line 9 provided from outside for emergency. The control unit 54 causes the valve drive circuit 53 to open the valve when the AC voltage is lost and the DC voltage is fed from the DC power source line 9 to the power feed port 7.
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公开(公告)号：EP4130610A1
公开(公告)日：2023-02-08
申请号：EP21800672.4
申请日：2021-05-10
发明人： IYOSHI, Yuuta , YAMANOI, Yoshiki , SAEKI, Kumiko
摘要： To suppress accumulation of a refrigerant or refrigerating machine oil in a high-pressure gas connection pipe. A refrigeration cycle apparatus (1) includes a primary-side refrigerant circuit (5a) in which a first refrigerant circulates and a secondary-side refrigerant circuit (10) in which a second refrigerant circulates. The primary-side refrigerant circuit includes a primary-side compressor (71), a primary-side flow path (35b) of a cascade heat exchanger (35), a primary-side heat exchanger (74), and a primary-side switching mechanism (72). The secondary-side refrigerant circuit includes a secondary-side compressor (21), a secondary-side flow path (35a) of the cascade heat exchanger (35), a secondary-side switching mechanism (22), a suction flow path (23), a plurality of utilization-side heat exchangers (52a, 52b, 52c), a first connection flow path, connecting the plurality of utilization-side heat exchangers (52a, 52b, 52c) and the secondary-side switching mechanism (22), including a secondary-side first connection pipe (8), a first heat source pipe (28), first branch pipes (63a, 63b, 63c), junction pipes (62a, 62b, 62c), first connection pipes (15a, 15b, 15c), and first utilization pipes (57a, 57b, 57c), a second connection flow path, connecting the plurality of utilization-side heat exchangers (52a, 52b, 52c) and the suction flow path (23), including a secondary side second connection pipe (9), a second heat source pipe (29), second branch pipes (64a, 64b, 64c), the junction pipes (62a, 62b, 62c), the first connection pipes (15a, 15b, 15c), and the first utilization pipes (57a, 57b, 57c), a third connection flow path, connecting the plurality of utilization-side heat exchangers (52a, 52b, 52c) and the secondary-side flow path (35a) of the cascade heat exchanger (35), including a secondary-side third connection pipe (7), a fourth heat source pipe (26), a fifth heat source pipe (27), third branch pipes (61a, 61b, 61c), second connection pipes (16a, 16b, 16c), and second utilization pipes (56a, 56b, 56c).
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公开(公告)号：EP4019861A1
公开(公告)日：2022-06-29
申请号：EP20873121.6
申请日：2020-09-29
发明人： YOSHIMI, Atsushi , KUMAKURA, Eiji , IWATA, Ikuhiro , MIYAZAKI, Takeru , YAMADA, Takuro , YAMANOI, Yoshiki , IYOSHI, Yuuta
摘要： An air conditioning apparatus (1) is an air conditioning apparatus dedicated to cooling and including a first circuit (C1) and a second circuit (C2). The first circuit (C1) has an outdoor heat exchanger (12) that cools a first refrigerant by outdoor air. In the second circuit (C2), a first heat transfer medium that is cooled by exchanging heat with the first refrigerant that flows in the first circuit (C1) flows. The first refrigerant is a HFO refrigerant having a critical temperature higher than that of R32.
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公开(公告)号：EP4148346A1
公开(公告)日：2023-03-15
申请号：EP21799922.6
申请日：2021-05-10
发明人： IYOSHI, Yuuta , YAMANOI, Yoshiki
摘要： A refrigeration cycle system, a heat source unit, or a refrigeration cycle apparatus using a carbon dioxide refrigerant enables supply of a sufficient amount of a high-pressure refrigerant to a plurality of utilization heat exchangers. A refrigeration cycle system (1) using a carbon dioxide refrigerant includes: a heat source circuit (12) including a secondary-side compressor (21), a cascade heat exchanger (35), a secondary-side switching mechanism (22), and a suction flow path (23); a plurality of utilization circuits (13a, 13b, 13c) respectively including utilization-side heat exchanger (52a, 52b, 52c); a first communication pipe (8); a second communication pipe (9); a third communication pipe (7); a connection path (45); and a first on-off valve (46). The first communication pipe (8) and the first heat source pipe (28) connect the plurality of utilization-side heat exchangers (52a, 52b, 52c) and the secondary-side switching mechanism (22). The second communication pipe (9) and the second heat source pipe (29) connect the plurality of utilization-side heat exchangers (52a, 52b, 52c) and suction flow path (23). The third communication pipe (7), the fourth heat source pipe (26), and the fifth heat source pipe (27) connect the plurality of utilization-side heat exchangers (52a, 52b, 52c) and the cascade heat exchanger (35). The connection path (45) connects the first communication pipe (8) and the second communication pipe (9). The first on-off valve (46) switches between a state in which the first communication pipe (8) and the second communication pipe (9) connect and a state in which they do not connect.
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公开(公告)号：EP4148344A1
公开(公告)日：2023-03-15
申请号：EP21800967.8
申请日：2021-05-10
发明人： YAMANOI, Yoshiki , IYOSHI, Yuuta
摘要： To suppress an increase in pressure of a refrigerant on a discharge side of a compressor in a secondary-side refrigerant circuit. A refrigeration cycle system (1) includes a primary-side refrigerant circuit (5a) and a secondary-side refrigerant circuit (10). The secondary-side refrigerant circuit (10) includes a secondary-side compressor (21), a cascade heat exchanger (35), a secondary-side expansion valve (36), and a utilization-side heat exchanger (52a-c), which are connected to each other, and a carbon dioxide refrigerant circulates through the secondary-side refrigerant circuit. The secondary-side refrigerant circuit (10) includes a third heat source pipe (25) connecting the secondary-side compressor (21) to the cascade heat exchanger (35), a fourth heat source pipe (26) connecting the cascade heat exchanger (35) to the secondary-side expansion valve (36), a suction flow path (23), and a bypass flow path (47) connecting at least one of the third heat source pipe (25) and the fourth heat source pipe (26) to the suction flow path (23). The primary-side refrigerant circuit (5a) includes the cascade heat exchanger (35), and a heat medium different from the carbon dioxide refrigerant circulates through the primary-side refrigerant circuit. In the case of using the cascade heat exchanger (35) as a radiator of the secondary-side refrigerant circuit (10) and a heat sink of the primary-side refrigerant circuit (5a), the control unit (80) starts the secondary-side compressor (21) of the secondary-side refrigerant circuit (10) after a flow of the heat medium generates in the cascade heat exchanger (35) in the primary-side refrigerant circuit (5a).
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公开(公告)号：EP4145068A1
公开(公告)日：2023-03-08
申请号：EP21795704.2
申请日：2021-03-17
发明人： IYOSHI, Yuuta , YAMANOI, Yoshiki , SAEKI, Kumiko
摘要： An air-conditioning management system 1 includes: an air conditioning apparatus 2 configured to carry out a refrigerant recovery operation of recovering a refrigerant from a refrigerant circuit 9 that connects an outdoor unit 3 and an indoor unit 4 and sending the recovered refrigerant to each recovery unit 12, 16 of the outdoor unit 3; and a control unit 62 configured to make a determination whether all the recovered refrigerant is sendable to each recovery unit 12, 16 before a start of the refrigerant recovery operation by the air conditioning apparatus 2, and to output, when determining that all the recovered refrigerant is not sendable to each recovery unit 12, 16, a command for notifying the determination.
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