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    Diagnostic mode of operation to detect refrigerant leaks in a refrigeration circuit
    1.
    发明授权
    Diagnostic mode of operation to detect refrigerant leaks in a refrigeration circuit 有权

    公开(公告)号：US11378316B2

    公开(公告)日：2022-07-05

    申请号：US16901751

    申请日：2020-06-15

    申请人： Johnson Controls Technology Company

    发明人： Jay C. Walser ,  William F. McQuade

    IPC分类号： F25B49/02 ,  F25B49/00 ,  F25B41/34

    摘要： The present disclosure relates to a refrigeration circuit that includes a controller communicatively coupled to a compressor, an expansion valve, and a sensor of the refrigeration circuit. The controller may activate the compressor and actuate the expansion valve such that the compressor is active while the expansion valve is closed. The controller may also measure a pressure of a refrigerant in the refrigeration circuit using the sensor while the compressor is active and the expansion valve is closed. Additionally, the controller may determine whether a refrigerant leak exists based on a maximum measurement time being reached or a time difference between a first time associated with the compressor being active while the expansion valve is closed and a second time associated with the measured pressure falling below a threshold value.

    DIAGNOSTIC MODE OF OPERATION TO DETECT REFRIGERANT LEAKS IN A REFRIGERATION CIRCUIT
    4.
    发明申请
    DIAGNOSTIC MODE OF OPERATION TO DETECT REFRIGERANT LEAKS IN A REFRIGERATION CIRCUIT 审中-公开

    公开(公告)号：US20200309434A1

    公开(公告)日：2020-10-01

    申请号：US16901751

    申请日：2020-06-15

    申请人： Johnson Controls Technology Company

    发明人： Jay C. Walser ,  William F. McQuade

    IPC分类号： F25B49/02 ,  F25B41/06 ,  F25B49/00

    摘要： The present disclosure relates to a refrigeration circuit that includes a controller communicatively coupled to a compressor, an expansion valve, and a sensor of the refrigeration circuit. The controller may activate the compressor and actuate the expansion valve such that the compressor is active while the expansion valve is closed. The controller may also measure a pressure of a refrigerant in the refrigeration circuit using the sensor while the compressor is active and the expansion valve is closed. Additionally, the controller may determine whether a refrigerant leak exists based on a maximum measurement time being reached or a time difference between a first time associated with the compressor being active while the expansion valve is closed and a second time associated with the measured pressure falling below a threshold value.

    Diagnostic mode of operation to detect refrigerant leaks in a refrigeration circuit
    5.
    发明授权
    Diagnostic mode of operation to detect refrigerant leaks in a refrigeration circuit 有权

    公开(公告)号：US10684052B2

    公开(公告)日：2020-06-16

    申请号：US15876408

    申请日：2018-01-22

    申请人： Johnson Controls Technology Company

    发明人： Jay C. Walser ,  William F. McQuade

    IPC分类号： F25B49/02 ,  F25B41/06 ,  F25B49/00

    摘要： The present disclosure relates to a refrigeration circuit that includes a controller communicatively coupled to a compressor, an expansion valve, and a sensor of the refrigeration circuit. The controller may activate the compressor and actuate the expansion valve such that the compressor is active while the expansion valve is closed. The controller may also measure a pressure of a refrigerant in the refrigeration circuit using the sensor while the compressor is active and the expansion valve is closed. Additionally, the controller may determine whether a refrigerant leak exists based on a maximum measurement time being reached or a time difference between a first time associated with the compressor being active while the expansion valve is closed and a second time associated with the measured pressure falling below a threshold value.

    SYSTEMS AND METHODS FOR DETECTING REFRIGERANT LEAKS IN HEATING, VENTILATING, AND AIR CONDITIONING (HVAC) SYSTEMS
    6.
    发明申请
    SYSTEMS AND METHODS FOR DETECTING REFRIGERANT LEAKS IN HEATING, VENTILATING, AND AIR CONDITIONING (HVAC) SYSTEMS 审中-公开

    公开(公告)号：US20190170600A1

    公开(公告)日：2019-06-06

    申请号：US15871704

    申请日：2018-01-15

    申请人： Johnson Controls Technology Company

    发明人： Steven A. Tice ,  William F. McQuade

    IPC分类号： G01M3/16 ,  F25B49/00

    摘要： The present disclosure relates to a refrigerant leak detection and mitigation system of a heating, ventilating, and air conditioning (HVAC) unit. The refrigerant leak detection and mitigation system includes a controller configured to determine a plurality of parameters correlated to refrigerant leak conditions based on data from a plurality of sensors. The controller is also configured to determine a probability of a refrigerant leak in the HVAC unit based on the plurality of parameters. Additionally, the controller is configured to provide a control signal to modify operation of the HVAC unit in response to comparison of the probability with a threshold value.