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公开(公告)号：EP3859244A1
公开(公告)日：2021-08-04
申请号：EP18935245.3
申请日：2018-09-28
IPC分类号： F25B47/02
摘要： An air-conditioning apparatus includes: a plurality of outdoor units each including a compressor and an outdoor heat exchanger, refrigerant flowing through the plurality of outdoor units; an indoor unit including an indoor heat exchanger, a heat medium flowing through the indoor unit; a plurality of relay devices to which the plurality of outdoor units are connected independently, and to which the indoor unit is connected, each of the plurality of relay devices including a heat medium heat exchanger configured to exchange heat between the refrigerant and the heat medium; and a controller configured to control action of the plurality of outdoor units, the indoor unit, and the plurality of relay devices, wherein the controller includes a defrost determination unit configured to determine necessity for a defrosting operation, a load determination unit configured to compare, in a case where the defrosting operation is necessary, an indoor unit total load with an outdoor unit total capacity, and an equipment control unit configured to control an operating frequency of the compressor of an outdoor unit other than the outdoor unit on which the defrosting operation is to be performed such that the outdoor unit total capacity is increased in a case where the indoor unit total load is greater than the outdoor unit total capacity.
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公开(公告)号：EP4290158A1
公开(公告)日：2023-12-13
申请号：EP21924550.3
申请日：2021-02-02
发明人： MIZUNO, Yuki , IKEDA, Soshi , MIYAWAKI, Kosuke , NISHIO, Jun , MOTOMURA, Yuji , WASHIYAMA, Hiroki
IPC分类号： F25B1/00
摘要： A refrigeration cycle device capable of suppressing uneven frost formation on the evaporator and preventing degradation of the heat exchange performance is provided. The refrigeration cycle device (100), provided with a main circuit and a bypass circuit to exchange heat between the non-azeotropic mixed refrigerants flowing through the main circuit and the bypass circuit by a supercooling heat exchanger (3), further includes: a controller (20) to control an opening degree of the bypass expansion valve (6) provided in the bypass circuit; a first sensor (7) to detect a temperature at the refrigerant inflow side of the evaporator; and a second sensor (8) to detect a pressure of the non-azeotropic mixed refrigerant flowing from the evaporator, wherein the controller (20) controls the opening degree of the bypass expansion valve (6) using temperatures of the evaporator, that is, the temperature at the refrigerant inflow side and a saturated gas temperature of the non-azeotropic mixed refrigerant calculated from the pressure so as to adjust a flow rate of the non-azeotropic mixed refrigerant flowing into the evaporator, to eliminate the temperature difference in the flow direction in the evaporator for suppressing uneven frost formation on the evaporator, and thus to prevent heat exchange performance from degrading.
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公开(公告)号：EP4141354A1
公开(公告)日：2023-03-01
申请号：EP20932739.4
申请日：2020-04-20
摘要： A relay unit includes: a heat medium heat exchanger; a casing containing the heat medium heat exchanger; a first refrigerant pipe connection port to be connected to one of refrigerant pipes, the refrigerant pipes including a refrigerant pipe through which refrigerant flows from a heat source side unit into the heat medium heat exchanger and a refrigerant pipe through which the refrigerant flows out from the heat medium heat exchanger into the heat source side unit; a second refrigerant pipe connection port to be connected to an other of the refrigerant pipes; a first heat medium pipe connection port to be connected to one of heat medium pipes, the heat medium pipes including a heat medium pipe through which a heat medium flows from a load side unit into the heat medium heat exchanger and a heat medium pipe through which the heat medium flows out from the heat medium heat exchanger into the load side unit; and a second heat medium pipe connection port to be connected to an other of the heat medium pipes. The first refrigerant pipe connection port, the second refrigerant pipe connection port, the first heat medium pipe connection port, and the second heat medium pipe connection port are provided on a top surface of the casing and face in a direction opposite to a direction of gravity.
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公开(公告)号：EP4116638A1
公开(公告)日：2023-01-11
申请号：EP20923544.9
申请日：2020-03-04
发明人： HONDA, Kazuya , TAKENAKA, Naofumi , MOTOMURA, Yuji , KADOWAKI, Kimitaka , FURUYA, Koji , WASHIYAMA, Hiroki
摘要： An air-conditioning apparatus is configured to allow heat exchange in an intermediate heat exchanger between refrigerant that circulates in a refrigerant cycle circuit and a heat medium that circulates in a heat-medium cycle circuit. The heat-medium cycle circuit includes a discharge mechanism including a discharge valve, the discharge mechanism being configured to, when the discharge valve is open, discharge air present inside the heat-medium cycle circuit to the outside of the heat-medium cycle circuit. The air-conditioning apparatus is configured to execute an air discharge operation mode in which the air present inside the heat-medium cycle circuit is discharged to the outside of the heat-medium cycle circuit. The air discharge operation mode includes a first operation mode, and a second operation mode performed after the first operation mode. The first operation mode is an operation mode in which, with the discharge valve being closed, an operation similar to a cooling operation is performed. The second operation mode is an operation mode in which, with the discharge valve being open, an operation similar to a heating operation is performed.
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公开(公告)号：EP4382821A1
公开(公告)日：2024-06-12
申请号：EP21952782.7
申请日：2021-08-05
摘要： A relay unit includes a housing with a box shape, the housing having a lower portion having four side faces and an outlet formed in each of the four side faces; a heat exchanger accommodated in the housing; and a drain pan located below the heat exchanger to receive drain water. At a front face of the lower portion of the housing, a sheet metal cover in which the outlet is formed is provided such that the sheet metal cover is removable, the drain pan includes a plate with a rectangular shape, the plate having four side portions, a side wall portion extending upward from each of the four side portions of the plate, and a drain socket provided in the side wall portion located forward or rearward, and to which a drain hose is connected, the drain pan is accommodated in the housing such that the drain pan is freely inserted and removed in a front-rear direction in a state in which the sheet metal cover is removed from the housing, and the drain pan is freely reversed front to rear to be accommodated in the housing.
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公开(公告)号：EP4354031A1
公开(公告)日：2024-04-17
申请号：EP21945073.1
申请日：2021-06-09
发明人： FURUYA, Koji , WASHIYAMA, Hiroki , MOTOMURA, Yuji
摘要： An air-conditioning apparatus includes a heat-medium cycle circuit that causes a heat medium to circulate in the heat-medium cycle circuit. The heat-medium cycle circuit includes a heat-source-side device, plural indoor heat exchangers, and a main pump, which are connected to each other by a pipe in the heat-medium cycle circuit. The heat-source-side device heats or cools the heat medium, which serves as a heat transfer medium. The plural indoor heat exchangers exchange heat between the heat medium and indoor air to be conditioned. The main pump pressurizes the heat medium and supplies the pressurized heat medium to the plural indoor heat exchangers. The air-conditioning apparatus further includes a pumping-performance-control pump installed in the heat-medium cycle circuit and supporting pumping performance of the main pump.
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公开(公告)号：EP3779308A1
公开(公告)日：2021-02-17
申请号：EP18913344.0
申请日：2018-04-05
摘要： An air-conditioning apparatus of the present disclosure includes a heat medium circulation circuit and a heat-source-side refrigerant circulation circuit. In the heat medium circulation circuit, a pump configured to pressurize a heat medium that contains water or brine and transfers heat, an indoor heat exchanger configured to exchange heat between an indoor air of an air-conditioned space and the heat medium, and a flow control device installed corresponding to the indoor heat exchanger and configured to control a flow rate of the heat medium passing through the indoor heat exchanger are connected by a pipe to circulate the heat medium therein. In the heat-source-side refrigerant circulation circuit, a compressor configured to compress a heat-source-side refrigerant, a heat-source-side heat exchanger configured to exchange heat between the heat-source-side refrigerant and an outdoor air, an expansion device configured to decompress the heat-source-side refrigerant, and a heat medium heat exchanger configured to exchange heat between the heat-source-side refrigerant and the heat medium are connected by a pipe. A plurality of the indoor heat exchangers are installed in respective indoor units. Each of the indoor units includes a detection device configured to detect a physical quantity related to a heat quantity involved in heat exchange of the indoor heat exchanger, and is configured to perform communication by a signal containing data on detection of the detection device.
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公开(公告)号：EP4212792A1
公开(公告)日：2023-07-19
申请号：EP20952497.4
申请日：2020-09-07
IPC分类号： F25B1/00 , F24F5/00 , F24F11/84 , F24F140/12 , F24F140/20
摘要： An air-conditioning apparatus includes an outdoor unit, multiple indoor units, and an intermediate unit. The indoor units each include a flow control device and an indoor controller. The intermediate unit includes an intermediate heat exchanger, a circulation device, and an intermediate controller. When at least one indoor unit starts operating, the intermediate controller determines whether a flow rate of a heat medium flowing into the intermediate heat exchanger is greater than or equal to a minimum flow rate. In response to determining that the flow rate is less than the minimum flow rate, the intermediate controller transmits an open instruction signal, representing an instruction to increase the opening degree of the flow control device, to the indoor controller of the indoor unit that is in a non-operation state. The indoor controller increases the opening degree of the flow control device in response to the received open instruction signal.
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公开(公告)号：EP4191164A1
公开(公告)日：2023-06-07
申请号：EP20948526.7
申请日：2020-08-03
发明人： WASHIYAMA, Hiroki , MOTOMURA, Yuji , FURUYA, Koji
摘要： An air-conditioning apparatus includes a low-pressure-side pressure sensor that detects the pressure of heat-source-side refrigerant that flows into a compressor and outputs it as a first detection value and a high-pressure-side pressure sensor that detects the pressure of heat-source-side refrigerant discharged from the compressor and outputs it as a second detection value. When switching the operation mode of the apparatus, a controller determines whether the ratio of the first detection value to the second detection value is higher than a first threshold. When the ratio is higher than the threshold, the controller causes a second refrigerant flow switching device to perform a switching operation. When the ratio is less than or equal to the threshold, the controller makes an adjustment such that an opening degree of an expansion device is less than a second threshold, and then causes the second refrigerant flow switching device to perform the switching operation.
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公开(公告)号：EP4148332A1
公开(公告)日：2023-03-15
申请号：EP20934322.7
申请日：2020-05-07
摘要： A heat medium relay device includes: a housing having a vertical cuboid shape, and having an interior partitioned into a first space, a second space above the first space, and a third space above the second space; a first heat exchanger provided in the second space to cause heat exchange to be performed between a primary heat medium and a secondary heat medium, the primary heat medium being in a cooled state and supplied from the outdoor unit; a first pump provided in the first space to pressurize the secondary heat medium subjected to the heat exchange at the first heat exchanger, and circulate the pressurized secondary heat medium between the first pump and at least one indoor unit; a second heat exchanger provided in the second space to cause heat exchange to be performed between the primary heat medium and the second heat medium, the primary heat medium being in a heated state and supplied from the outdoor unit; a second pump provided in the first space to pressurize the secondary heat medium subjected to the heat exchange at the second heat exchanger, and circulate the pressurized secondary heat medium between the second pump and the at least one indoor unit; and a valve block provided in the third space, and including a plurality of valves to allow the secondary heat medium subjected to the heat exchange at the first heat exchanger and the secondary heat medium subjected to the heat exchange at the second heat exchanger to flow to the at least one indoor unit, the valve block being lighter in weight than each of the first heat exchanger, the first pump, the second heat exchanger, and the second pump.
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