Patents by Inventor John T. Knight
John T. Knight has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240133596Abstract: A heating, ventilation, and/or air conditioning (HVAC) unit includes a first sensor disposed adjacent to an inlet of an evaporator configured to receive an airflow. The HVAC unit includes a second sensor disposed adjacent to an outlet of a reheat coil positioned downstream of the evaporator and configured to expel the airflow. The HVAC unit also includes a controller configured to regulate operation of a modulating reheat valve to adjust flow of a working fluid in thermal communication with the airflow to control a difference between a measurement of the first sensor and a measurement of the second sensor.Type: ApplicationFiled: September 24, 2023Publication date: April 25, 2024Inventors: John T. Knight, Stephen B. Pickle, Norman J. Blanton, Kerry L. Shumway
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Patent number: 11768020Abstract: A heating, ventilation, and/or air conditioning (HVAC) unit includes a first sensor disposed adjacent to an inlet of an evaporator configured to receive an airflow. The HVAC unit includes a second sensor disposed adjacent to an outlet of a reheat coil positioned downstream of the evaporator and configured to expel the airflow. The HVAC unit also includes a controller configured to regulate operation of a modulating reheat valve to adjust flow of a working fluid in thermal communication with the airflow to control a difference between a measurement of the first sensor and a measurement of the second sensor.Type: GrantFiled: August 22, 2022Date of Patent: September 26, 2023Assignee: Johnson Controls Tyco IP Holdings LLPInventors: John T. Knight, Stephen B. Pickle, Norman J. Blanton, Kerry L Shumway
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Publication number: 20230087675Abstract: A heating, ventilation, and/or air conditioning (HVAC) unit includes a first sensor disposed adjacent to an inlet of an evaporator configured to receive an airflow. The HVAC unit includes a second sensor disposed adjacent to an outlet of a reheat coil positioned downstream of the evaporator and configured to expel the airflow. The HVAC unit also includes a controller configured to regulate operation of a modulating reheat valve to adjust flow of a working fluid in thermal communication with the airflow to control a difference between a measurement of the first sensor and a measurement of the second sensor.Type: ApplicationFiled: August 22, 2022Publication date: March 23, 2023Inventors: John T. Knight, Stephen B. Pickle, Norman J. Blanton, Kerry L. Shumway
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Publication number: 20230003415Abstract: A system for modulating hot gas reheat operation of a heating, ventilation, and/or air conditioning (HVAC) system with multiple compressors, wherein the HVAC system is configured to regulate air provided to multiple zones. The system includes a controller configured to respond to a call for dehumidification in the absence of a call for cooling by sequentially energizing a first compressor of the multiple compressors in a reheat mode of the first compressor, energizing a second compressor of the multiple compressors in a cooling mode of the second compressor, energizing a third compressor of the multiple compressors in a reheat mode of the third compressor initially at full capacity, and energizing a fourth compressor of the multiple compressors in a cooling mode of the fourth compressor.Type: ApplicationFiled: September 13, 2022Publication date: January 5, 2023Inventors: Stephen B. Pickle, John T. Knight
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Patent number: 11473809Abstract: A system for modulating hot gas reheat operation of a heating, ventilation, and/or air conditioning (HVAC) system with multiple compressors, wherein the HVAC system is configured to regulate air provided to multiple zones. The system includes a controller configured to respond to a call for dehumidification in the absence of a call for cooling by sequentially energizing a first compressor of the multiple compressors in a reheat mode of the first compressor, energizing a second compressor of the multiple compressors in a cooling mode of the second compressor, energizing a third compressor of the multiple compressors in a reheat mode of the third compressor initially at full capacity, and energizing a fourth compressor of the multiple compressors in a cooling mode of the fourth compressor.Type: GrantFiled: June 25, 2019Date of Patent: October 18, 2022Assignee: JOHNSON CONTROLS TYCO IP HOLDNGS LLPInventors: Stephen B. Pickle, John T. Knight
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Patent number: 11421923Abstract: A heating, ventilation, and/or air conditioning (HVAC) unit includes a first sensor disposed adjacent to an inlet of an evaporator configured to receive an airflow. The HVAC unit includes a second sensor disposed adjacent to an outlet of a reheat coil positioned downstream of the evaporator and configured to expel the airflow. The HVAC unit also includes a controller configured to regulate operation of a modulating reheat valve to adjust flow of a working fluid in thermal communication with the airflow to control a difference between a measurement of the first sensor and a measurement of the second sensor.Type: GrantFiled: July 16, 2019Date of Patent: August 23, 2022Assignee: Johnson Controls Tyco IP Holdings LLPInventors: John T. Knight, Stephen B. Pickle, Norman J. Blanton, Kerry L. Shumway
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Patent number: 11162704Abstract: A heating, ventilating, and air conditioning (HVAC) system includes a compressor configured to circulate a fluid through the HVAC system, a first coil configured to establish a first heat exchange relationship between the fluid and a first airflow across the first coil, a second coil configured to establish a second heat exchange relationship between the fluid and a second airflow across the second coil, and a fan configured to direct the first airflow across the first coil, the second airflow across the second coil, or both, and where the first airflow across the first coil is directed to be isolated from the second airflow across the second coil, and the first airflow is blocked from flowing across the first coil when the first coil is inactive and the second airflow is blocked from flowing across the second coil when the second coil is inactive.Type: GrantFiled: August 30, 2019Date of Patent: November 2, 2021Assignee: Johnson Controls Technology CompanyInventors: John T. Knight, Stephen B. Pickle
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Publication number: 20200370765Abstract: A heating, ventilation, and/or air conditioning (HVAC) unit includes a first sensor disposed adjacent to an inlet of an evaporator configured to receive an airflow. The HVAC unit includes a second sensor disposed adjacent to an outlet of a reheat coil positioned downstream of the evaporator and configured to expel the airflow. The HVAC unit also includes a controller configured to regulate operation of a modulating reheat valve to adjust flow of a working fluid in thermal communication with the airflow to control a difference between a measurement of the first sensor and a measurement of the second sensor.Type: ApplicationFiled: July 16, 2019Publication date: November 26, 2020Inventors: John T. Knight, Stephen B. Pickle, Norman J. Blanton, Kerry L. Shumway
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Publication number: 20200271340Abstract: A system for modulating hot gas reheat operation of a heating, ventilation, and/or air conditioning (HVAC) system with multiple compressors, wherein the HVAC system is configured to regulate air provided to multiple zones. The system includes a controller configured to respond to a call for dehumidification in the absence of a call for cooling by sequentially energizing a first compressor of the multiple compressors in a reheat mode of the first compressor, energizing a second compressor of the multiple compressors in a cooling mode of the second compressor, energizing a third compressor of the multiple compressors in a reheat mode of the third compressor initially at full capacity, and energizing a fourth compressor of the multiple compressors in a cooling mode of the fourth compressor.Type: ApplicationFiled: June 25, 2019Publication date: August 27, 2020Inventors: Stephen B. Pickle, John T. Knight
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Patent number: 10584896Abstract: A heating, ventilating, and air conditioning (HVAC) furnace includes a condensing furnace and a condensate removal system associated with the condensing furnace. The condensate removal system includes an electrolyzer having a container that may collect a condensate generated from an exhaust gas produced in the condensing furnace and an electrode disposed within the container and that may apply an electric current to the condensate to electrolyze the condensate and thereby generate condensate gases.Type: GrantFiled: June 30, 2017Date of Patent: March 10, 2020Assignee: Johnson Controls Technology CompanyInventors: Stephen C. Wilson, John T. Knight
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Publication number: 20190383513Abstract: A heating, ventilating, and air conditioning (HVAC) system includes a compressor configured to circulate a fluid through the HVAC system, a first coil configured to establish a first heat exchange relationship between the fluid and a first airflow across the first coil, a second coil configured to establish a second heat exchange relationship between the fluid and a second airflow across the second coil, and a fan configured to direct the first airflow across the first coil, the second airflow across the second coil, or both, and where the first airflow across the first coil is directed to be isolated from the second airflow across the second coil, and the first airflow is blocked from flowing across the first coil when the first coil is inactive and the second airflow is blocked from flowing across the second coil when the second coil is inactive.Type: ApplicationFiled: August 30, 2019Publication date: December 19, 2019Inventors: John T. Knight, Stephen B. Pickle
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Patent number: 10401046Abstract: A heating, ventilating, and air conditioning (HVAC) system includes a compressor configured to circulate a fluid through the HVAC system, a first coil configured to establish a first heat exchange relationship between the fluid and a first airflow across the first coil, a second coil configured to establish a second heat exchange relationship between the fluid and a second airflow across the second coil, and a fan configured to direct the first airflow across the first coil, the second airflow across the second coil, or both, and where the first airflow across the first coil is directed to be isolated from the second airflow across the second coil, and the first airflow is blocked from flowing across the first coil when the first coil is inactive and the second airflow is blocked from flowing across the second coil when the second coil is inactive.Type: GrantFiled: August 2, 2017Date of Patent: September 3, 2019Assignee: Johnson Controls Technology CompanyInventors: John T. Knight, Stephen B. Pickle
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Publication number: 20190234421Abstract: A fan blade includes an edge formation disposed on an edge of the fan blade, where the edge formation comprises an incline surface relative to a main portion of the fan blade and a decline surface relative to the main portion of the fan blade, and wherein the incline surface and the decline surface are asymmetric to one another.Type: ApplicationFiled: March 19, 2018Publication date: August 1, 2019Inventors: Stephen C. Wilson, John T. Knight
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Publication number: 20180094827Abstract: A heating, ventilating, and air conditioning (HVAC) system includes a compressor configured to circulate a fluid through the HVAC system, a first coil configured to establish a first heat exchange relationship between the fluid and a first airflow across the first coil, a second coil configured to establish a second heat exchange relationship between the fluid and a second airflow across the second coil, and a fan configured to direct the first airflow across the first coil, the second airflow across the second coil, or both, and where the first airflow across the first coil is directed to be isolated from the second airflow across the second coil, and the first airflow is blocked from flowing across the first coil when the first coil is inactive and the second airflow is blocked from flowing across the second coil when the second coil is inactive.Type: ApplicationFiled: August 2, 2017Publication date: April 5, 2018Inventors: John T. Knight, Stephen B. Pickle
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Publication number: 20180031275Abstract: A heating, ventilating, and air conditioning (HVAC) furnace includes a condensing furnace and a condensate removal system associated with the condensing furnace. The condensate removal system includes an electrolyzer having a container that may collect a condensate generated from an exhaust gas produced in the condensing furnace and an electrode disposed within the container and that may apply an electric current to the condensate to electrolyze the condensate and thereby generate condensate gases.Type: ApplicationFiled: June 30, 2017Publication date: February 1, 2018Inventors: Stephen C. Wilson, John T. Knight
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Patent number: 8561427Abstract: Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and multi-slab heat exchangers are provided that include fluid connections for transmitting fluid between groups of tubes. The fluid connections may include generally tubular members fluidly connected to manifold sections. The fluid connections also may include partitioned manifolds containing tubes of different heights. Multichannel tubes are also provided that include a bent section configured to locate a flow path near a leading edge of a tube within one section and near a trailing edge of the tube within another section.Type: GrantFiled: April 18, 2011Date of Patent: October 22, 2013Assignee: Johnson Controls Technology CompanyInventors: John T. Knight, William L. Kopko, Stephen B. Pickle, Jose Ruel Yalung de la Cruz, Tony Clive Coleman, Mahesh Valiya-Naduvath
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Patent number: 8281615Abstract: Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and heat exchangers are provided which include manifold configurations designed to promote mixing of vapor phase and liquid phase refrigerant. The manifolds contain flow mixers such as a helical tape, sectioned volumes, and partitions containing apertures. The flow mixers direct the flow of refrigerant within the manifold to promote a more homogenous distribution of fluid within the multichannel tubes.Type: GrantFiled: January 28, 2011Date of Patent: October 9, 2012Assignee: Johnson Controls Technology CompanyInventors: Jeffrey Lee Tucker, Mahesh Valiya-Naduvath, John T. Knight, Judd M. Vance
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Publication number: 20110192582Abstract: Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and multi-slab heat exchangers are provided that include fluid connections for transmitting fluid between groups of tubes. The fluid connections may include generally tubular members fluidly connected to manifold sections. The fluid connections also may include partitioned manifolds containing tubes of different heights. Multichannel tubes are also provided that include a bent section configured to locate a flow path near a leading edge of a tube within one section and near a trailing edge of the tube within another section.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANYInventors: John T. Knight, William L. Kopko, Stephen B. Pickle, Jose Ruel Yalung de la Cruz, Tony Clive Coleman, Mahesh Valiya-Naduvath
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Publication number: 20110132587Abstract: Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and heat exchangers are provided which include manifold configurations designed to promote mixing of vapor phase and liquid phase refrigerant. The manifolds contain flow mixers such as a helical tape, sectioned volumes, and partitions containing apertures. The flow mixers direct the flow of refrigerant within the manifold to promote a more homogenous distribution of fluid within the multichannel tubes.Type: ApplicationFiled: January 28, 2011Publication date: June 9, 2011Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANYInventors: Jeffrey Lee Tucker, Mahesh Valiya-Naduvath, John T. Knight, Judd M. Vance
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Patent number: 7942020Abstract: Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and multi-slab heat exchangers are provided that include fluid connections for transmitting fluid between groups of tubes. The fluid connections may include generally tubular members fluidly connected to manifold sections. The fluid connections also may include partitioned manifolds containing tubes of different heights. Multichannel tubes are also provided that include a bent section configured to locate a flow path near a leading edge of a tube within one section and near a trailing edge of the tube within another section.Type: GrantFiled: August 28, 2008Date of Patent: May 17, 2011Assignee: Johnson Controls Technology CompanyInventors: John T. Knight, William L. Kopko, Stephen B. Pickle, Jose Ruel Yalung de la Cruz, Tony Clive Coleman, Mahesh Valiya-Naduvath