Failure detection and compensation in heating, ventilation and air conditioning (HVAC) equipment

    公开(公告)号:US12092353B2

    公开(公告)日:2024-09-17

    申请号:US18484258

    申请日:2023-10-10

    IPC分类号: F24F11/74 F24F11/32

    CPC分类号: F24F11/74 F24F11/32

    摘要: An apparatus for controlling heating, ventilation and air conditioning (HVAC) equipment includes: a memory configured to store computer-readable program code; and processing circuitry configured to access the memory to execute the computer-readable program code, where executing the computer-readable code causes the processing circuitry to detect that a first HVAC unit has failed to control a first environmental condition of a first confined area serviced by the first HVAC unit to meet a first predetermined setpoint for the first confined area and to draw second conditioned air from a second confined area into the first confined area until the first environmental condition meets the first predetermined setpoint by controlling the first HVAC unit to cause the first HVAC unit to reduce air pressure in the first confined area.

    REFRIGERANT RECOVERY AND REPURPOSING
    4.
    发明公开

    公开(公告)号:US20240288206A1

    公开(公告)日:2024-08-29

    申请号:US18656840

    申请日:2024-05-07

    IPC分类号: F25B43/00 F25B45/00

    摘要: Methods, systems and apparatuses are described that are directed to on-site recovery and/or repurposing of refrigerant, where an original refrigerant is converted into a refrigerant different from the original refrigerant. The refrigerant different from the original refrigerant can have relatively lower global warming potential (GWP) than the original refrigerant. The recovery and/or repurposing can be implemented for example in a refrigeration circuit, such as for example in general cooling and/or heating applications, which may be embodied in a heating, venting, and air conditioning (HVAC) system and/or unit, in a transport refrigeration system and/or unit, as well as in commercial, residential and/or industrial cooling and/or heating applications.

    GAS BEARING COMPRESSOR BACKUP POWER
    5.
    发明公开

    公开(公告)号:US20240240644A1

    公开(公告)日:2024-07-18

    申请号:US18587229

    申请日:2024-02-26

    摘要: A compressor for a heat transfer circuit includes a variable frequency drive (VFD), an electric motor that rotates a driveshaft, bearing(s) for supporting the driveshaft, a backup gas supply, and a power supply. During a utility power interruption, the backup gas supply operates utilizing DC electrical power generated by a back electromotive force of the electric motor. A method of operating an electric power supply system for a compressor includes operating in a utility power mode and operating in a backup power mode during a utility power interruption. In the utility power mode, AC electrical power is supplied from the VFD to the motor. In the backup power mode, DC electrical power generated in the VFD by a back electromotive force of the motor it used to operate a backup gas supply to supply compressed working fluid to gas bearing(s) of the compressor.

    COMPRESSOR LUBRICATION SUPPLY SYSTEM AND COMPRESSOR THEREOF

    公开(公告)号:US20240183360A1

    公开(公告)日:2024-06-06

    申请号:US18439032

    申请日:2024-02-12

    摘要: A lubricant supply system is for a compressor that compresses a first working fluid in a heat transfer circuit. The lubricant supply system includes a lubricant tank, a lubricant pathway for supplying lubricant from the lubricant tank to one or more bearings of the compressor, and a lubricant refrigeration system with a lubricant heater and a lubricant cooler. The lubricant heater configured to heat the lubricant discharged from the one or more bearings and the lubricant cooler configured to cool the lubricant flowing through the lubricant pathway. A method of lubricating a compressor includes heating the lubricant, directing the lubricant from a lubricant tank through a lubricant pathway to one or more bearings of the compressor, and cooling the lubricant passing through the lubricant pathway.