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    SYSTEM FOR MANAGING LUBRICANT LEVELS IN TANDEM COMPRESSOR ASSEMBLIES OF AN HVAC SYSTEM
    2.
    发明申请
    SYSTEM FOR MANAGING LUBRICANT LEVELS IN TANDEM COMPRESSOR ASSEMBLIES OF AN HVAC SYSTEM 有权
    用于管理HVAC系统的压缩机组件中的润滑剂水平的系统

    公开(公告)号：US20170051960A1

    公开(公告)日：2017-02-23

    申请号：US15343258

    申请日：2016-11-04

    Applicant: Lennox Industries Inc.

    Inventor： Aylan Him ,  Der-Kai Hung ,  David Mackey ,  Lin Hong

    IPC: F25B49/02 ,  F25B31/00

    CPC classification number: F25B49/022 ,  F25B31/004 ,  F25B31/02 ,  F25B2400/06 ,  F25B2400/075 ,  F25B2500/16 ,  F25B2600/01 ,  F25B2600/0251 ,  F25B2600/0252 ,  F25B2700/03 ,  F25B2700/2106

    Abstract: The present invention provides a control system for managing lubricant levels in tandem compressor assemblies of a heating, ventilation, and air conditioning (HVAC) system. In transitioning from a partial load that operates a first compressor but not a second compressor of a tandem assembly to a full load that operates both the first and the second compressor, a controller of the HVAC system turns OFF both compressors of the tandem compressor assembly to allow time for lubricant levels to equalize between the first and the second compressor.

    Abstract translation: 本发明提供一种用于管理加热，通风和空调（HVAC）系统的串联压缩机组件中的润滑剂水平的控制系统。 在从操作第一压缩机而不是串联组件的第二压缩机的部分负载转换到操作第一和第二压缩机的全负载时，HVAC系统的控制器将串联压缩机组件的两个压缩机关闭 允许润滑剂水平的时间在第一和第二压缩机之间相等。

    Method to avoid fan cycling during low ambient operation
    4.
    发明授权
    Method to avoid fan cycling during low ambient operation 有权

    公开(公告)号：US11353252B2

    公开(公告)日：2022-06-07

    申请号：US16704449

    申请日：2019-12-05

    Applicant: Lennox Industries Inc.

    Inventor： David Mackey ,  Aylan Him ,  Zer Kai Yap

    IPC: F25B49/00 ,  F25B49/02 ,  F24F1/38 ,  F25B6/02 ,  F25B39/00 ,  F24F110/12 ,  F24F140/12 ,  F25B39/04

    Abstract: A method of controlling an HVAC circuit, comprises allowing refrigerant to circulate within the HVAC circuit, wherein the HVAC circuit comprises an evaporator coil, a condenser coil, at least one fan configured to provide airflow to the condenser coil, at least one expansion valve, and at least one compressor. The method continues by receiving a temperature measurement and determining based on the temperature measurement, a minimum fan speed configured to avoid pressure spikes within the condenser coil. The method concludes by sending a signal to the at the least one fan to direct the at least one fan to spin at a rate greater than or equal to the minimum fan speed when the measured temperature is less than a predetermined temperature, wherein, when the refrigerant circulates through the condenser coil, the minimum fan speed is greater than zero rotations per minute.

    System for managing lubricant levels in tandem compressor assemblies of an HVAC system
    6.
    发明授权
    System for managing lubricant levels in tandem compressor assemblies of an HVAC system 有权

    公开(公告)号：US10047965B2

    公开(公告)日：2018-08-14

    申请号：US14860274

    申请日：2015-09-21

    Applicant: Lennox Industries Inc.

    Inventor： David Mackey ,  Der-Kai Hung ,  Aylan Him ,  Hong Lin

    IPC: F25B31/00 ,  F25B49/02 ,  F24F7/007 ,  F17D3/00

    Abstract: A heating, ventilation, and air-conditioning (HVAC) system comprises a plurality of sensors, a plurality of tandem compressor assemblies that each comprise a first compressor and a second compressor, and a controller communicatively coupled to the plurality of sensors and the plurality of tandem compressor assemblies. The controller determines an increase in a cooling demand of a structure associated with the HVAC system based on data received from at least one of the plurality of sensors. Also, the controller compares an ambient temperature outside of the structure to a first threshold. In response to determining that the ambient temperature is greater than the first threshold, the controller operates the HVAC system in a first mode and in response to determining that the ambient temperature is less than the first threshold, the controller operates the HVAC system in a second mode.

    Method to avoid fan cycling during low ambient operation
    10.
    发明授权
    Method to avoid fan cycling during low ambient operation 有权

    公开(公告)号：US10520235B2

    公开(公告)日：2019-12-31

    申请号：US15374665

    申请日：2016-12-09

    Applicant: Lennox Industries Inc.

    Inventor： David Mackey ,  Aylan Him ,  Zer Kai Yap

    IPC: F25B49/02 ,  F25B39/00 ,  F25B39/04

    Abstract: A system based on temperature and/or pressure switches connected to a fan controller. An HVAC circuit includes at least one condenser coil with a plurality of tubes, one or more stages coupled to one or more compressors, at least one temperature sensor, at least one fan configured to provide airflow across the plurality of tubes, and a controller. Instead of cycling the fan off and on, fans associated with the condenser are kept running at a low speed.

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