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538 条记录 (耗时 0.023 秒)

    Gas heat pump system
    1.
    发明授权
    Gas heat pump system 有权

    公开(公告)号：US11460223B2

    公开(公告)日：2022-10-04

    申请号：US16626475

    申请日：2018-01-11

    申请人： LG ELECTRONICS INC.

    发明人： Seokpyo Hong

    IPC分类号： F25B41/00 ,  F25B1/04 ,  F25B30/02 ,  F25B41/40 ,  F25B41/42 ,  F25B9/00 ,  F25B27/02

    摘要： A gas heat pump system including an outdoor unit having a compressor, an outdoor heat exchanger, and an expansion device; an indoor unit having an indoor heat exchanger; a refrigerant pipe to connect the outdoor unit and the indoor unit; an engine to combust mixed fuel in which fuel and air are mixed; a coolant tank to store a coolant; a radiator to emit, to an outside, heat which is transferred from the engine to the coolant; and a coolant pipe to connect the coolant tank and the radiator to allow the coolant to circulate therethrough, whereby the gas heat pump system has a cooling capability between 71 kW and 85 kW, the refrigerant is a mixed refrigerant having at least 50% R32, and the refrigerant pipe is a ductile stainless steel pipe having a delta ferrite matrix structure of 1% or less based on grain area.

    Air conditioner
    2.
    发明授权
    Air conditioner 有权

    公开(公告)号：US11413713B2

    公开(公告)日：2022-08-16

    申请号：US16493742

    申请日：2018-01-11

    申请人： LG ELECTRONICS INC.

    发明人： Seokpyo Hong

    IPC分类号： F24F1/32 ,  F25B9/00 ,  B23P13/02 ,  F25B1/04

    摘要： The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 7 kW to 11 kW, inclusive, and uses, as a refrigerant, a mixed refrigerant containing 50% or more of R32, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, and includes a suction pipe guiding the suction of the refrigerant into a compressor and having an outer diameter of 15.88 mm, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.

    Refrigeration apparatus
    3.
    发明授权
    Refrigeration apparatus 有权

    公开(公告)号：US11280525B2

    公开(公告)日：2022-03-22

    申请号：US17012868

    申请日：2020-09-04

    申请人： DAIKIN INDUSTRIES, LTD.

    发明人： Tomoyuki Haikawa ,  Tomoatsu Minamida ,  Shigeharu Taira

    IPC分类号： F25B1/04 ,  F25B1/00 ,  F25B49/02

    摘要： To reduce the possibility that temperature of refrigerant discharged from a compressor of a refrigeration apparatus becomes excessively high by controlling torque of a motor built into the compressor, the compressor includes the motor having rotation thereof controlled by inverter control. An inverter controller controls torque of the motor using inverter control when operation frequency of the compressor is at least one value within a range of from 10 Hz to 40 Hz. When at least the operation frequency is within the range of from 10 Hz to 40 Hz, torque of the motor is controlled, and under a predetermined condition in which temperature of refrigerant discharged from the compressor easily becomes excessively high, a device controller controls devices provided in a refrigerant circuit such that refrigerant sucked into the compressor is placed in a wet vapor state.

    Refrigeration apparatus with leak detection on the usage side and a refrigerant release mechanism
    4.
    发明授权
    Refrigeration apparatus with leak detection on the usage side and a refrigerant release mechanism 有权

    公开(公告)号：US11280523B2

    公开(公告)日：2022-03-22

    申请号：US16485675

    申请日：2018-02-14

    申请人： DAIKIN INDUSTRIES, LTD.

    发明人： Satoru Sakae ,  Takenori Mezaki

    IPC分类号： F25B1/04 ,  F25B49/02

    摘要： Provided is a refrigeration apparatus with improved safety. A refrigeration apparatus includes: a compressor; a heat source-side expansion valve to be controlled to have a minimum opening degree and brought into a closed state in which the heat source-side expansion valve maximizes prevention of a flow of a refrigerant toward a usage-side refrigerant circuit; a fusible plug; a controller; and a refrigerant leak detector configured to detect a refrigerant leak at the usage-side refrigerant circuit. The fusible plug is disposed in a refrigerant circuit, and is brought into an open state to allow the refrigerant circuit to communicate with an external space. When the refrigerant leak detector detects a refrigerant leak at the usage-side refrigerant circuit, the controller performs refrigerant leak first control to bring the heat source-side expansion valve into the closed state, and performs refrigerant leak second control to bring the fusible plug into the open state.

    Chiller plant with dynamic surge avoidance
    5.
    发明授权
    Chiller plant with dynamic surge avoidance 有权

    公开(公告)号：US11248823B2

    公开(公告)日：2022-02-15

    申请号：US16559367

    申请日：2019-09-03

    申请人： Trane International Inc.

    发明人： Christopher R. Vause ,  Scott A. Munns ,  Lee R. Cline

    IPC分类号： F25B1/04 ,  F25B49/02 ,  F04D27/02

    摘要： Systems, apparatus and methods for operating a chiller plant while minimizing or eliminating the occurrence of centrifugal compressor surge. Taking into account chiller design specifications and current operating conditions, a compressor lift point at which surge is predicted to occur is established. Minima and maxima for various chiller setpoints that avoid or eliminate the occurrence of compressor surge are imposed on setpoints provided by a conventional optimizing chiller controller. The chiller system is operated in accordance with the resultant anti-surge setpoints. Coolant tower flow is modulated to enable the compressor to operate at near-surge conditions while preventing the onset of actual surge.

    Rotor, motor, and air conditioning apparatus
    7.
    发明授权
    Rotor, motor, and air conditioning apparatus 有权

    公开(公告)号：US11047603B2

    公开(公告)日：2021-06-29

    申请号：US16483502

    申请日：2017-04-14

    申请人： Mitsubishi Electric Corporation

    发明人： Takaya Shimokawa ,  Hiroki Aso ,  Takanori Watanabe ,  Ryogo Takahashi

    IPC分类号： H02K1/27 ,  F25B1/04

    摘要： A rotor includes a shaft extending in the direction of an axis, and a rotor core including a central hole in which the shaft is inserted. The central hole includes a first central hole, a second central hole, and a third central hole in the direction of the axis. A distance from the axis to an inner circumferential surface of the third central hole is larger than a distance from the axis to an inner circumferential surface of the second central hole. The distance from the axis to the inner circumferential surface of the second central hole is larger than a distance from the axis to an inner circumferential surface of the first central hole.

    METHOD FOR OPERATING A CHILLER
    8.
    发明申请
    METHOD FOR OPERATING A CHILLER 有权

    公开(公告)号：US20210123648A1

    公开(公告)日：2021-04-29

    申请号：US17141952

    申请日：2021-01-05

    申请人： Johnson Controls Technology Company

    发明人： Jeb W. Schreiber

    IPC分类号： F25B49/02 ,  F25B1/02 ,  F25B25/00 ,  F25B1/04 ,  F25B13/00

    摘要： A method of operating a chiller having a closed refrigerant loop including a compressor, a condenser and an evaporator. The refrigerant used in the loop defining a pressure-enthalpy curve representative of different phases (vapor, liquid and vapor, and liquid) of the refrigerant at different combinations of pressure and enthalpy. The loop defining a process cycle (compression, condensation, expansion, and evaporation) of the refrigerant during operation of the loop relative to the pressure-enthalpy curve of the refrigerant. The method including continuously operating the compressor when a segment of the process cycle corresponds to the refrigerant being in the liquid phase.