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公开(公告)号：US11293659B2
公开(公告)日：2022-04-05
申请号：US16832255
申请日：2020-03-27
发明人： Amita Brahme , Umesh Gokhale
IPC分类号： F24F11/38 , F24F11/86 , F24F110/12 , F24F140/20
摘要： An HVAC system includes a reversing valve configured to receive refrigerant and direct the received refrigerant based on an operating mode of the HVAC system. The HVAC system includes first and second sensors. A sensor measures a heat-exchanger temperature associated with the outdoor heat exchanger. A controller monitors an outdoor temperature and the heat-exchanger temperature and compares these temperatures. The controller determines whether the HVAC system is intended to operate in a cooling or heating mode. If the heat-exchanger temperature is less than the outdoor temperature and the HVAC system is intended to operate in the cooling mode, the controller determines that a first reversing-valve fault is detected. The first reversing-valve fault is associated with the reversing valve being in the heating configuration when the HVAC system is intended to operate in the cooling mode.
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公开(公告)号：US20220034539A1
公开(公告)日：2022-02-03
申请号：US17451551
申请日：2021-10-20
发明人： Amita Brahme , Umesh Gokhale
IPC分类号： F24F11/38
摘要： A controller of an HVAC system is communicatively coupled to a liquid-side sensor and a shutoff switch. The controller stores measurements of a liquid-side property over an initial period of time. The controller detects that the shutoff switch is tripped at a first time stamp corresponding to an end of the initial period of time. The controller accesses the measurements of the liquid-side property. The controller determines, based on the measurements of the liquid-side property, that the liquid-side property has a decreasing trend. In response to determining that the liquid-side property has the decreasing trend, a malfunction of a blower of the system is determined to have caused the shutoff switch to trip.
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公开(公告)号：US20210140662A1
公开(公告)日：2021-05-13
申请号：US17155790
申请日：2021-01-22
发明人： Rakesh Goel , Umesh Gokhale
摘要： A controller of a heating, ventilation, and air conditioning (HVAC) system, the controller comprising instructions that cause the controller to determine an air flowrate of an air blower of the HVAC system and calculate a threshold value based on a minimum required air flowrate. The controller further comprises instructions that cause the controller to send a notification to an operator of the HVAC system indicating that the air flowrate of the air blower is less than the threshold value in response to determining that the air flowrate of the air blower is less than the threshold value and shut down the HVAC system such that the refrigerant is no longer circulated by the componentry of the HVAC system in response to determining that the air flowrate of the air blower is less than the minimum required air flowrate.
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公开(公告)号：US20240102685A1
公开(公告)日：2024-03-28
申请号：US18525802
申请日：2023-11-30
发明人： Umesh Gokhale , Eric Berg
CPC分类号： F24F11/86 , F24F11/46 , F24F11/61 , F24F11/63 , F24F2140/50
摘要： A device is configured to operate a Heating, Ventilation, and Air Conditioning (HVAC) system. The device is further configured to receive a temperature value and determine a load demand value based on the temperature value. The device is further configured to determine the load demand value is greater than the load capacity value for the HVAC system and, in response, identify a first setting from among a first plurality of settings for the HVAC system. By default, access to the first plurality of setting for the HVAC system is restricted for a user. The device is further configured to receive a response approving permission to operate the HVAC system using the first setting to the user and send a trigger signal to an HVAC controller to operate the one or more components of the HVAC system using the first setting.
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公开(公告)号：US11796237B2
公开(公告)日：2023-10-24
申请号：US17346656
申请日：2021-06-14
发明人： Wenqian Liu , Umesh Gokhale , Eric Berg
IPC分类号： F25B49/02 , G05B19/042
CPC分类号： F25B49/02 , F25B49/022 , F25B49/027 , G05B19/042 , F25B2500/13 , F25B2600/0253 , F25B2600/111 , G05B2219/2614
摘要： A method of minimizing components of a heating, ventilation, and air conditioning (HVAC) system from malfunctioning, the method includes measuring, by an accelerometer associated with at least one component of the HVAC system, vibration of the at least one component and receiving, by a controller, actual vibration data reflective of the measured vibration. The method further includes determining, using the controller, whether the actual vibration data is greater than pre-defined acceptable baseline vibration data by more than a pre-defined acceptable amount and responsive to a positive determination in the determining step, adding, by the controller, as a deadband frequency, an operational frequency of the at least one component corresponding to the actual vibration data.
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公开(公告)号：US11788753B2
公开(公告)日：2023-10-17
申请号：US17645522
申请日：2021-12-22
发明人： Amita Brahme , Umesh Gokhale
IPC分类号： F24F11/38 , F24F140/12
CPC分类号： F24F11/38 , F24F2140/12
摘要： A controller of an HVAC system monitors a suction-side property and a liquid-side property over a period of time. The controller determines whether the suction-side property has an increasing or decreasing trend over the period of time. The controller determines whether the liquid-side property has an increasing or decreasing trend. In response to determining that both the suction-side property and the liquid-side property have an increasing trend over the period of time, a fan fault is detected. In response to determining that the suction-side property has a decreasing trend and the liquid-side property has an increasing trend over the period of time, a blockage of a refrigerant conduit subsystem is detected. In response to determining that both the suction-side property and the liquid-side property have a decreasing trend over the period of time, a blower fault is detected.
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公开(公告)号：US11725837B2
公开(公告)日：2023-08-15
申请号：US17651924
申请日：2022-02-22
发明人： Amita Brahme , Umesh Gokhale
IPC分类号： F24F11/38 , F24F11/86 , F24F110/12 , F24F140/20
CPC分类号： F24F11/38 , F24F11/86 , F24F2110/12 , F24F2140/20
摘要： An HVAC system includes a reversing valve configured to receive refrigerant and direct the received refrigerant based on an operating mode of the HVAC system. A sensor measures a heat-exchanger temperature associated with an outdoor heat exchanger. A controller monitors an outdoor temperature and the heat-exchanger temperature and compares these temperatures. The controller determines whether the HVAC system is intended to operate in a cooling or heating mode. If the heat-exchanger temperature is less than the outdoor temperature and the HVAC system is intended to operate in the cooling mode, the controller determines that a first reversing-valve fault is detected. The first reversing-valve fault is associated with the reversing valve being in the heating configuration when the HVAC system is intended to operate in the cooling mode.
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公开(公告)号：US11662112B2
公开(公告)日：2023-05-30
申请号：US17451592
申请日：2021-10-20
发明人： Amita Brahme , Umesh Gokhale
IPC分类号： F24F11/38 , F24F11/86 , F24F140/20
CPC分类号： F24F11/38 , F24F11/86 , F24F2140/20
摘要： An HVAC system includes a reversing valve configured to receive compressed refrigerant and direct the refrigerant based on an operating mode. One or more suction-side sensors measure suction-side properties associated with refrigerant, including a suction-side temperature and a suction-side pressure. One or more liquid-side sensors measure liquid-side properties associated with the refrigerant. A controller monitors the suction-side pressure and liquid-side pressure and determines a ratio of the liquid-side pressure to the suction-side pressure. The controller further determines whether the suction-side temperature has an increasing trend. If the suction-side temperature has the increasing trend, the reversing valve is determined to be in an equalizing configuration. The equalizing configuration corresponds to a configuration in which the refrigerant provided from the outlet of the compressor is directed to the inlet of the compressor without first being directed to other components of the HVAC system.
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公开(公告)号：US11609010B2
公开(公告)日：2023-03-21
申请号：US17189535
申请日：2021-03-02
发明人： Amita Brahme , Umesh Gokhale
摘要： An HVAC system includes a controller communicatively coupled to a subcool sensor, an outdoor temperature sensor, a compressor, and a blower of the HVAC system. For a first period of time, the controller periodically determines subcool values. For each determined subcool value, a corresponding compressor speed, outdoor temperature, and blower speed are determined. A baseline database is generated with baseline values associated with normal operation of the HVAC system. Following the first period of time, subcool values are determined based on the subcool signal. For each subcool value, a corresponding compressor speed, outdoor temperature, and blower speed are determined. The controller determines whether each subcool value satisfies a criteria based on the baseline database. If the criteria are not satisfied for at least a threshold time, the system is determined to be operating under a fault condition, and a corresponding alert is transmitted.
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公开(公告)号：US20220034538A1
公开(公告)日：2022-02-03
申请号：US17451531
申请日：2021-10-20
发明人： Amita Brahme , Umesh Gokhale
IPC分类号： F24F11/38
摘要： A controller of an HVAC system is communicatively coupled to a liquid-side sensor and a shutoff switch. The controller stores measurements of a liquid-side property over an initial period of time. The controller detects that the shutoff switch is tripped at a first time stamp corresponding to an end of the initial period of time. The controller accesses the measurements of the liquid-side property. The controller determines, based on the measurements of the liquid-side property, that the liquid-side property has an increasing trend. In response to determining that the liquid-side property has the increasing trend, a blockage of the refrigerant conduit subsystem is determined to have caused the shutoff switch to trip.
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