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1. 发明公开

US20240230181A9 REFRIGERATION CYCLE APPARATUS 审中-公开
公开(公告)号：US20240230181A9
公开(公告)日：2024-07-11
申请号：US18548142
申请日：2021-04-22
申请人： Mitsubishi Electric Corporation
发明人： Takanori KOIKE , Kazuyoshi SHINOZAKI , Kosuke TANAKA
IPC分类号： F25B41/26 , F25B13/00
CPC分类号： F25B41/26 , F25B13/00
摘要： A refrigeration cycle apparatus includes a heat source side unit, a relay unit, and a plurality of load side units, the heat source side unit and the relay unit are connected by using a low-pressure pipe and a high-pressure pipe, and the relay unit and each of the plurality of load side units are connected by using a corresponding liquid branch pipe and a corresponding gas branch pipe. The heat source side unit includes a compressor configured to compress refrigerant, at least one flow switching valve configured to change a passage of refrigerant based on an operation mode, and at least one heat source side heat exchanger, and the relay unit includes six-way valves or pairs of four-way valves.

2. 发明申请

US20220412622A1 REFRIGERATION CYCLE APPARATUS 有权
公开(公告)号：US20220412622A1
公开(公告)日：2022-12-29
申请号：US17780743
申请日：2020-02-03
申请人： Mitsubishi Electric Corporation
发明人： Takanori KOIKE , Koji AZUMA , Naomichi TAMURA
IPC分类号： F25B49/02 , F25B13/00 , F25B40/06 , F25B41/34
摘要： A refrigeration cycle apparatus includes; a refrigerant circuit in which a compressor, a heat-source-side heat exchanger, a first expansion device, a second expansion device, and a load-side heat exchanger are sequentially connected by refrigerant pipes and in which refrigerant is circulated; a controller that controls the refrigerant circuit; a bypass pipe extending from a liquid pipe between the first expansion device and the second expansion device toward a suction side of the compressor; a third expansion device provided at the bypass pipe to decompress the refrigerant that flows through the bypass pipe; and a refrigerant cooler provided at the bypass pipe and downstream of the third expansion device to cause heat exchange to be performed between the refrigerant decompressed by the third expansion device and heat generated from the controller.

3. 发明申请

US20220011028A1 REFRIGERATION CYCLE DEVICE 有权
公开(公告)号：US20220011028A1
公开(公告)日：2022-01-13
申请号：US17440273
申请日：2019-05-29
申请人： Mitsubishi Electric Corporation
发明人： Takanori KOIKE , Naomichi TAMURA , Hiroyuki MORIMOTO
IPC分类号： F25B41/20 , F25B13/00
摘要： A refrigeration cycle device according to the present disclosure includes: a refrigerant circuit including a compressor, a heat-source-side heat exchanger, a first expansion device, and a load-side heat exchanger, refrigerant cycling through the compressor, the heat-source-side heat exchanger, the first expansion device, and the load-side heat exchanger; a plurality of controllers configured to control the refrigerant circuit; a bypass pipe branching from a high pressure pipe on a discharge side of the compressor and connected to a low pressure pipe on a suction side of the compressor; a second expansion device provided to the bypass pipe, and configured to adjust a flow rate of the refrigerant flowing through the bypass pipe; and a plurality of refrigerant coolers provided to the bypass pipe, and configured to cool the plurality of controllers by using the refrigerant the flow rate of which is adjusted by the second expansion device, each of the plurality of refrigerant coolers including a refrigerant cooling pipe and a plate, the refrigerant cooling pipe forming the bypass pipe, the plate being joined between the refrigerant cooling pipe and a controller of the plurality of controllers.

4. 发明申请

US20200182564A1 HEAT EXCHANGER AND AIR-CONDITIONING APPARATUS 审中-公开
公开(公告)号：US20200182564A1
公开(公告)日：2020-06-11
申请号：US16318273
申请日：2017-07-28
申请人： Mitsubishi Electric Corporation
发明人： Yoji ONAKA , Takashi MATSUMOTO , Kosuke MIYAWAKI , Hiroyuki OKANO , Takanori KOIKE , Takeshi HATOMURA , Osamu MORIMOTO
IPC分类号： F28F9/02 , F25B41/06 , F28F9/04 , F25B39/02 , F25B39/04
摘要： A heat exchanger includes a plurality of heat transfer tubes, a first header, a second header, and a plurality of fins. The heat exchanger constitutes a portion of a refrigeration cycle circuit in which refrigerant circulates. The second header includes a header pipe. The header pipe has an entrance portion. A bypass pipe is disposed between the entrance portion and the first header and configured to bypass refrigerant. The bypass pipe protrudes into the header pipe to be connected to the header pipe. The bypass pipe is provided with a flow control mechanism configured to control a flow rate of refrigerant.

5. 发明申请

US20200271357A1 REFRIGERATION CYCLE APPARATUS 审中-公开
公开(公告)号：US20200271357A1
公开(公告)日：2020-08-27
申请号：US16481097
申请日：2017-03-24
申请人： Mitsubishi Electric Corporation
发明人： Kosuke MIYAWAKI , Yoji ONAKA , Osamu MORIMOTO , Hiroyuki OKANO , Takanori KOIKE , Hiroki MARUYAMA
IPC分类号： F25B13/00
摘要： A refrigeration cycle apparatus includes a main circuit through which refrigerant circulates and in which a compressor, a condenser, a first expansion device, a centrifugal gas-liquid separator that separates refrigerant into gas refrigerant and liquid refrigerant by using centrifugal force, and an evaporator are connected by refrigerant pipes; and a bypass that returns the gas refrigerant obtained through the separation by the gas-liquid separator to a suction side of the compressor. The gas-liquid separator includes a cylindrical container, an inflow pipe, a gas outflow pipe, and a liquid outflow pipe. The main circuit includes a second expansion device provided between the liquid outflow pipe of the gas-liquid separator and the evaporator. The gas refrigerant discharged from the gas outflow pipe of the gas-liquid separator flows into the bypass, and the bypass is provided with a third expansion device.

6. 发明申请

US20200154603A1 HEAT SINK 审中-公开
公开(公告)号：US20200154603A1
公开(公告)日：2020-05-14
申请号：US16610569
申请日：2017-07-03
申请人： Mitsubishi Electric Corporation
发明人： Shuhei MIZUTANI , Takanori KOIKE
IPC分类号： H05K7/20
摘要： A heat sink includes a pipe through which cooled fluid flows and a cooling block having a first face on which the pipe is placed and a second face to which a heat emitting element is attached. The cooling block has a contact region and a noncontact region at positions where the cooling block faces the pipe. In the contact region, the first face contacts the pipe. In the noncontact region, the first face faces the pipe with a gap therebetween. The contact region is included in a projection region defined by projecting a region of attachment of the heat emitting element onto the first face.

7. 发明申请

US20190234626A1 HEADER, HEAT EXCHANGER, AND AIR-CONDITIONING APPARATUS 审中-公开
公开(公告)号：US20190234626A1
公开(公告)日：2019-08-01
申请号：US16319721
申请日：2016-09-12
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Yoji ONAKA , Takashi MATSUMOTO , Kosuke MIYAWAKI , Hiroyuki OKANO , Takanori KOIKE , Takeshi HATOMURA , Osamu MORIMOTO
IPC分类号： F24F1/14 , F28F9/02 , F25B1/00 , F25B39/02
CPC分类号： F24F1/14 , F25B1/00 , F25B1/005 , F25B39/00 , F25B39/02 , F28F9/02
摘要： A header includes a plurality of branch tubes and a header manifold. If refrigerant flowing into the header manifold forms a pattern of annular flow or churn flow, tips of the branch tubes inserted into the header manifold pass through a liquid-phase portion having a thickness δ [m] and reach a gas-phase portion. The thickness δ [m] of the liquid-phase portion is defined as δ=G×(1−x)×D/(4ρL×ULS), where G is a flow speed [kg/(m2s)] of the refrigerant, x is a quality of the refrigerant, D is an inside diameter [m] of the header manifold, ρL is a liquid density [kg/m3] of the refrigerant, ULS is a reference apparent liquid speed [m/s] that is a maximum value within a range of variation in an apparent gas speed of the refrigerant flowing into a flow space of the header manifold. The reference apparent liquid speed ULS [m/s] is defined as G(1−x)/ρL.

8. 发明申请

US20190293306A1 REFRIGERATION CYCLE APPARATUS 审中-公开
公开(公告)号：US20190293306A1
公开(公告)日：2019-09-26
申请号：US16318459
申请日：2016-09-16
申请人： Mitsubishi Electric Corporation
发明人： Yoshihiro TANIGUCHI , Shigeo TAKATA , Shinsaku KUSUBE , Takahiko KOBAYASHI , Takanori KOIKE
IPC分类号： F24F1/24
摘要： A refrigeration cycle apparatus includes a refrigerant circuit through which refrigerant circulates, a control box in which equipment for controlling the refrigeration cycle apparatus is accommodated, and a refrigerator for cooing a heat emitting body exposed from an opening of the control box. The heat emitting body is the equipment accommodated in the control box. The refrigerator includes a cooling body in contact with the heat emitting body, and a refrigerant pipe through which the refrigerant circulating through the refrigerant circuit passes to cool the cooling body. The refrigerant pipe is in contact with the cooling body. The pipe contact surface is different from the heating-body contact surface. The cooling body has a recessed portion at which the cooling body and the heat emitting body are not in contact with each other. The recessed portion is formed in the heating-body contact surface and spaced from the control box.

9. 发明申请

US20180328639A1 REFRIGERATION CYCLE APPARATUS 审中-公开
公开(公告)号：US20180328639A1
公开(公告)日：2018-11-15
申请号：US15779663
申请日：2016-01-27
申请人： Mitsubishi Electric Corporation
发明人： Takanori KOIKE , Osamu MORIMOTO , Kazuyoshi SHINOZAKI , Hiroyuki OKANO
IPC分类号： F25B49/02 , F25B41/06 , F25B30/02
CPC分类号： F25B49/02 , F25B1/00 , F25B13/00 , F25B30/02 , F25B41/062
摘要： A refrigeration cycle apparatus includes a refrigerant circuit, through which refrigerant is circulated, including a compressor, a heat source side heat exchanger, a first expansion device, and a load side heat exchanger, a controller controlling the refrigerant circuit, and a bypass pipe that branches off from a high-pressure pipe extending from the compressor to the first expansion device and that is connected to a low-pressure pipe on a suction side of the compressor. The apparatus further includes a precooling heat exchanger that is provided in the bypass pipe and that cools the refrigerant diverted to the bypass pipe, a second expansion device that is provided in the bypass pipe and that reduces a pressure of the refrigerant cooled by the precooling heat exchanger, and a refrigerant cooler that is provided in the bypass pipe and that cools the controller with the refrigerant reduced in pressure by the second expansion device.

10. 发明公开

US20240133597A1 REFRIGERATION CYCLE APPARATUS 审中-公开
公开(公告)号：US20240133597A1
公开(公告)日：2024-04-25
申请号：US18548142
申请日：2021-04-21
申请人： Mitsubishi Electric Corporation
发明人： Takanori KOIKE , Kazuyoshi SHINOZAKI , Kosuke TANAKA
IPC分类号： F25B41/26 , F25B13/00
CPC分类号： F25B41/26 , F25B13/00
摘要： A refrigeration cycle apparatus includes a heat source side unit, a relay unit, and a plurality of load side units, the heat source side unit and the relay unit are connected by using a low-pressure pipe and a high-pressure pipe, and the relay unit and each of the plurality of load side units are connected by using a corresponding liquid branch pipe and a corresponding gas branch pipe. The heat source side unit includes a compressor configured to compress refrigerant, at least one flow switching valve configured to change a passage of refrigerant based on an operation mode, and at least one heat source side heat exchanger, and the relay unit includes six-way valves or pairs of four-way valves.

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