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22 条记录 (耗时 0.017 秒)

    Air Conditioning Apparatus
    1.
    发明申请
    Air Conditioning Apparatus 有权

    公开(公告)号：US20220235946A1

    公开(公告)日：2022-07-28

    申请号：US17615242

    申请日：2019-07-30

    申请人： Mitsubishi Electric Corporation

    发明人： Tetsuhide YOKOYAMA ,  Satoru YANACHI ,  Masahiro ITO ,  Tomohiro NAGANO ,  Takumi NISHIYAMA ,  Tsuyoshi SATO

    IPC分类号： F24F1/0003 ,  C09K5/04

    摘要： An air conditioning apparatus includes a first refrigerant circuit enclosing a first refrigerant, and a second refrigerant circuit enclosing a second refrigerant. The first refrigerant circuit includes a compressor configured to compress the first refrigerant, an outdoor heat exchanger, an expansion device, and a first flow path through which the first refrigerant passes in an intermediate heat exchanger configured to exchange heat between the first refrigerant and the second refrigerant. The second refrigerant circuit includes a pump configured to increase a pressure of the second refrigerant and transfer the second refrigerant, a second flow path through which the second refrigerant passes in the intermediate heat exchanger, and an indoor heat exchanger. At least one of the first refrigerant and the second refrigerant has a global warming potential lower than that of R32, and the second refrigerant has a lower flammable limit concentration higher than that of the first refrigerant.

    REFRIGERATION CYCLE APPARATUS
    2.
    发明申请
    REFRIGERATION CYCLE APPARATUS 审中-公开

    公开(公告)号：US20200256590A1

    公开(公告)日：2020-08-13

    申请号：US16754481

    申请日：2017-10-27

    申请人： Mitsubishi Electric Corporation

    发明人： Takumi NISHIYAMA

    IPC分类号： F25B13/00 ,  F25B41/06 ,  F25B40/02

    摘要： A refrigeration cycle apparatus includes an outdoor unit including a compressor, a first heat exchanger, and a first expansion valve, an indoor unit including a second expansion valve and a second heat exchanger, and a first pipe and a second pipe connected between the outdoor unit and the indoor unit. In a cooling operation, refrigerant delivered from the compressor sequentially passes through the first heat exchanger, the first expansion valve, the first pipe, the second expansion valve, the second heat exchanger, and the second pipe and returns to the compressor, and in the cooling operation, the first expansion valve converts refrigerant from a liquid-phase state to a two-phase state and sends two-phase refrigerant to the first pipe.

    HEAT EXCHANGER AND AIR CONDITIONER
    5.
    发明申请
    HEAT EXCHANGER AND AIR CONDITIONER 有权

    公开(公告)号：US20230043875A1

    公开(公告)日：2023-02-09

    申请号：US17790299

    申请日：2020-03-05

    申请人： Mitsubishi Electric Corporation

    发明人： Tsuyoshi SATO ,  Takumi NISHIYAMA ,  Kenta MURATA

    IPC分类号： F25B39/04 ,  F28F13/02 ,  F28F13/06 ,  F25B39/02

    摘要： A heat exchanger for an air conditioner for which a zeotropic refrigerant mixture is used is obtained, and the heat exchanger, when used as an evaporator, enables reduction of the amount of required refrigerant without deteriorating the heat transfer performance. The heat exchanger includes: a plurality of fins stacked together at predetermined intervals therebetween; first heat transfer pipes which extend through the plurality of fins, in which a heat medium flows, and which have a plurality of grooves in the inner surface of the pipes; and second heat transfer pipes extending through the plurality of fins, having one end connected to one end of the first heat transfer pipes to form one heat medium flow path, being smaller in pipe diameter than the first heat transfer pipes, and having an inner surface shape providing a pressure loss per unit length smaller than that of the first heat transfer pipes.

    REFRIGERATION CYCLE APPARATUS
    6.
    发明申请
    REFRIGERATION CYCLE APPARATUS 审中-公开

    公开(公告)号：US20190024951A1

    公开(公告)日：2019-01-24

    申请号：US16068388

    申请日：2016-02-22

    申请人： Mitsubishi Electric Corporation

    发明人： Takumi NISHIYAMA ,  Kosuke TANAKA

    IPC分类号： F25B13/00 ,  F25B41/04

    摘要： A refrigeration cycle apparatus includes a heat exchanger, and a flow switching circuit configured to switch the heat exchanger to act as any one of an evaporator and a condenser, the flow switching circuit is configured to allow refrigerant to flow into the heat exchanger in the same direction both in a case where the heat exchanger acts as an evaporator and in a case where the heat exchanger acts as a condenser, the heat exchanger includes a path switching circuit including a plurality of paths, and the path switching circuit is configured to switch an order of the plurality of paths through which refrigerant flows between an order of the plurality of paths in the case where the heat exchanger acts as an evaporator and another order of the plurality of paths in the case where the heat exchanger acts as a condenser.

    REFRIGERATION CYCLE APPARATUS
    9.
    发明申请
    REFRIGERATION CYCLE APPARATUS 有权

    公开(公告)号：US20210108842A1

    公开(公告)日：2021-04-15

    申请号：US17057030

    申请日：2018-07-27

    申请人： Mitsubishi Electric Corporation

    发明人： Takumi NISHIYAMA

    IPC分类号： F25B47/02 ,  F25B5/02 ,  F25B6/02 ,  F25B1/00

    摘要： In a refrigeration cycle apparatus according to the present invention, a non-azeotropic refrigerant mixture is used. The refrigeration cycle apparatus includes a compressor, a first heat exchanger, a decompressor, a second heat exchanger, a third heat exchanger, and a blower. The blower blows air to the second heat exchanger and the third heat exchanger. The non-azeotropic refrigerant mixture circulates in a first circulation direction through the compressor, the first heat exchanger, the decompressor, the second heat exchanger, and the third heat exchanger. The second heat exchanger is greater in flow path resistance than the third heat exchanger. The blower forms a parallel flow with the non-azeotropic refrigerant mixture that flows through the second heat exchanger and the third heat exchanger.

    REFRIGERATION CYCLE APPARATUS
    10.
    发明申请
    REFRIGERATION CYCLE APPARATUS 审中-公开

    公开(公告)号：US20190277549A1

    公开(公告)日：2019-09-12

    申请号：US16326949

    申请日：2016-10-28

    申请人： Mitsubishi Electric Corporation

    发明人： Takumi NISHIYAMA ,  Kosuke TANAKA ,  Mitsuru KAWASHIMA

    IPC分类号： F25B47/00 ,  F25B13/00

    摘要： A refrigeration cycle apparatus includes a refrigeration circuit in which non-azeotropic refrigerant mixture circulates. The refrigeration circuit includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, an expansion valve, and a four-way valve. The four-way valve is configured to assume a first state and a second state. The outdoor heat exchanger includes a plurality of refrigerant flow paths and a linear flow path switching valve configured to switch connections of the plurality of refrigerant flow paths between a series state in which the non-azeotropic refrigerant mixture flows through the plurality of refrigerant flow paths in series and a parallel state in which the non-azeotropic refrigerant mixture flows through the plurality of refrigerant flow paths in parallel. A controller switches the linear flow path switching valve between the series state and the parallel state when a multi-way valve is in the second state.