Patents by Inventor Pete Hrejsa
Pete Hrejsa 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: 20230417437Abstract: A system includes multiple HVAC systems. After receiving a demand request, a multiple-system controller a first anticipated power consumption associated with operating a first HVAC system at a first temperature setpoint during a future period of time of the demand response request and a second anticipated power consumption associated with operating a second HVAC system at a second temperature setpoint during the future period of time. Based at least in part on the first and the second anticipated power consumptions, a staging schedule is determined that indicates when to operate the first and second HVAC systems.Type: ApplicationFiled: September 7, 2023Publication date: December 28, 2023Inventors: Rohini Brahme, Chao Xia, Pete Hrejsa
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Publication number: 20230366581Abstract: An HVAC system includes one or more air quality sensors, each configured to measure an air quality and a thermostat communicatively coupled to the one or more air quality sensors. The thermostat receives indoor air quality measurements from the one or more air quality sensors. An indoor air quality score is determined based at least in part on the received indoor air quality measurements. The thermostat determines, based at least in part on the indoor air quality score, a mitigation action, wherein the mitigation action comprises one or more actions selected from the group of: (i) a filtering action comprising filtering air provided to the space using an air purification subsystem, and (ii) a ventilation action comprising ventilating the space using a ventilation subsystem. The mitigation action is executed, or implemented, by adjusting one or more components of the HVAC system.Type: ApplicationFiled: May 11, 2022Publication date: November 16, 2023Inventors: Sanjeev Hingorani, Henry Greist, Elena Smirnova, Pete Hrejsa, Emile Abi-Habib, Dhishan Kande
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Patent number: 11802703Abstract: A system includes multiple HVAC systems. After receiving a demand request, a multiple-system controller determines a first anticipated power consumption associated with operating a first HVAC system at a first temperature setpoint during a future period of time of the demand response request and a second anticipated power consumption associated with operating a second HVAC system at a second temperature setpoint during the future period of time. Based at least in part on the first and the second anticipated power consumptions, a staging schedule is determined that indicates when to operate the first and second HVAC systems.Type: GrantFiled: January 13, 2022Date of Patent: October 31, 2023Assignee: Lennox Industries Inc.Inventors: Rohini Brahme, Chao Xia, Pete Hrejsa
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Publication number: 20230296277Abstract: An HVAC system includes a variable speed compressor. A controller determines that the HVAC system is requested to operate according to a demand response during a demand response time. A curtailment compressor speed is determined that achieves the reduced power consumption requested by the demand response. At a start of the demand response time, the controller begins operating the variable speed compressor at the curtailment speed. During the demand response time, the controller adjusts the speed of the variable speed compressor using dynamic control logic with an offset setpoint temperature used as the control setpoint value when an indoor air temperature of the space is less than the offset setpoint temperature and greater than the baseline setpoint temperature.Type: ApplicationFiled: March 21, 2022Publication date: September 21, 2023Inventors: Rohini Brahme, Pete Hrejsa
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Publication number: 20230221028Abstract: A system includes multiple HVAC systems. After receiving a demand request, a multiple-system controller a first anticipated power consumption associated with operating a first HVAC system at a first temperature setpoint during a future period of time of the demand response request and a second anticipated power consumption associated with operating a second HVAC system at a second temperature setpoint during the future period of time. Based at least in part on the first and the second anticipated power consumptions, a staging schedule is determined that indicates when to operate the first and second HVAC systems.Type: ApplicationFiled: January 13, 2022Publication date: July 13, 2023Inventors: Rohini Brahme, Chao Xia, Pete Hrejsa
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Patent number: 11629900Abstract: A defrost method for a heat pump system includes running the heat pump system in a heating mode to provide heat to an enclosed space and determining if an outdoor temperature is less than an outdoor threshold temperature. Responsive to a determination that the outdoor temperature is below the outdoor threshold temperature, determining if a calibration state has been previously run. Responsive to a determination that the calibration state has not been previously run, running the heat pump system in the calibration state. Responsive to a determination that the calibration state has been previously run, determining if a temperature difference between a temperature of an evaporator coil of the heat pump system and the outdoor temperature exceeds a temperature threshold value. Responsive to a determination that the temperature difference between the evaporator coil and the outdoor temperature is greater than the temperature threshold value, running the heat pump system in a defrost state.Type: GrantFiled: May 23, 2022Date of Patent: April 18, 2023Assignee: Lennox Industries Inc.Inventors: Eric Berg, Pete Hrejsa
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Publication number: 20220282896Abstract: A defrost method for a heat pump system includes running the heat pump system in a heating mode to provide heat to an enclosed space and determining if an outdoor temperature is less than an outdoor threshold temperature. Responsive to a determination that the outdoor temperature is below the outdoor threshold temperature, determining if a calibration state has been previously run. Responsive to a determination that the calibration state has not been previously run, running the heat pump system in the calibration state. Responsive to a determination that the calibration state has been previously run, determining if a temperature difference between a temperature of an evaporator coil of the heat pump system and the outdoor temperature exceeds a temperature threshold value. Responsive to a determination that the temperature difference between the evaporator coil and the outdoor temperature is greater than the temperature threshold value, running the heat pump system in a defrost state.Type: ApplicationFiled: May 23, 2022Publication date: September 8, 2022Applicant: Lennox Industries Inc.Inventors: Eric BERG, Pete HREJSA
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Patent number: 11371762Abstract: A defrost method for a heat pump system includes running the heat pump system in a heating mode to provide heat to an enclosed space and determining if an outdoor temperature is less than an outdoor threshold temperature. Responsive to a determination that the outdoor temperature is below the outdoor threshold temperature, determining if a calibration state has been previously run. Responsive to a determination that the calibration state has not been previously run, running the heat pump system in the calibration state. Responsive to a determination that the calibration state has been previously run, determining if a temperature difference between a temperature of an evaporator coil of the heat pump system and the outdoor temperature exceeds a temperature threshold value. Responsive to a determination that the temperature difference between the evaporator coil and the outdoor temperature is greater than the temperature threshold value, running the heat pump system in a defrost state.Type: GrantFiled: May 22, 2020Date of Patent: June 28, 2022Assignee: Lennox Industries Inc.Inventors: Eric Berg, Pete Hrejsa
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Publication number: 20210364207Abstract: A defrost method for a heat pump system includes running the heat pump system in a heating mode to provide heat to an enclosed space and determining if an outdoor temperature is less than an outdoor threshold temperature. Responsive to a determination that the outdoor temperature is below the outdoor threshold temperature, determining if a calibration state has been previously run. Responsive to a determination that the calibration state has not been previously run, running the heat pump system in the calibration state. Responsive to a determination that the calibration state has been previously run, determining if a temperature difference between a temperature of an evaporator coil of the heat pump system and the outdoor temperature exceeds a temperature threshold value. Responsive to a determination that the temperature difference between the evaporator coil and the outdoor temperature is greater than the temperature threshold value, running the heat pump system in a defrost state.Type: ApplicationFiled: May 22, 2020Publication date: November 25, 2021Applicant: Lennox Industries Inc.Inventors: Eric BERG, Pete HREJSA
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Patent number: 10458691Abstract: In various implementations, a request for operation of an air conditioner may be received. The air conditioner may include a cooling mode and/or a dehumidifying mode. In some implementations, a compressor speed for a compressor of the air conditioner may be determined, and which mode(s) of the air conditioner to allow may be determined based at least partially on the determined compressor speed.Type: GrantFiled: October 27, 2017Date of Patent: October 29, 2019Assignee: Lennox Industries Inc.Inventors: Yi Qu, Pete Hrejsa, Eric Berg
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Patent number: 10215464Abstract: One aspect presents a controller that comprises a control board, a microprocessor located on and electrically coupled to the control board, and a memory coupled to the microprocessor and located on and electrically coupled to the control board. The controller is configured to receive an operating parameter signal and recalculate a first maximum heating % demand to a second maximum heating % demand that is greater than the first maximum heating % demand, when a value of the operating parameter signal exceeds a predetermined value, and operate the HP system based on the second maximum heating % demand.Type: GrantFiled: August 10, 2017Date of Patent: February 26, 2019Assignee: Lennox Industries Inc.Inventors: Rakesh Goel, Eric Berg, Pete Hrejsa
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Patent number: 9933200Abstract: In various implementations, defrost operations may be managed. A change in the temperature of a heat exchanger may be determined. A determination whether to allow a defrost operation may be at least partially based on the determined change in the temperature of the heat exchanger.Type: GrantFiled: November 27, 2013Date of Patent: April 3, 2018Assignee: Lennox Industries Inc.Inventors: Yi Qu, Pete Hrejsa
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Publication number: 20180051923Abstract: In various implementations, a request for operation of an air conditioner may be received. The air conditioner may include a cooling mode and/or a dehumidifying mode. In some implementations, a compressor speed for a compressor of the air conditioner may be determined, and which mode(s) of the air conditioner to allow may be determined based at least partially on the determined compressor speed.Type: ApplicationFiled: October 27, 2017Publication date: February 22, 2018Applicant: Lennox Industries Inc.Inventors: Yi Qu, Pete Hrejsa, Eric Berg
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Patent number: 9869500Abstract: One aspect presents an controller that comprises a control board, a microprocessor located on and electrically coupled to the control board, and a memory coupled to the microprocessor and located on and electrically coupled to the control board. The controller is configured to receive a trip signal from a refrigerant high pressure sensor and set a maximum heating % demand of the heat pump system based on the trip signal, recalculate a heating % demand based on at least one of the recalculated heating % demand or the maximum heating % demand.Type: GrantFiled: November 22, 2013Date of Patent: January 16, 2018Assignee: Lennox Industries Inc.Inventors: Rakesh Goel, Eric Berg, Pete Hrejsa
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Publication number: 20170336117Abstract: One aspect presents a controller that comprises a control board, a microprocessor located on and electrically coupled to the control board, and a memory coupled to the microprocessor and located on and electrically coupled to the control board. The controller is configured to receive an operating parameter signal and recalculate a first maximum heating % demand to a second maximum heating % demand that is greater than the first maximum heating % demand, when a value of the operating parameter signal exceeds a predetermined value, and operate the HP system based on the second maximum heating % demand.Type: ApplicationFiled: August 10, 2017Publication date: November 23, 2017Applicant: Lennox Industries Inc.Inventors: Rakesh GOEL, Eric Berg, Pete Hrejsa
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Patent number: 9810467Abstract: In various implementations, a request for operation of an air conditioner may be received. The air conditioner may include a cooling mode and/or a dehumidifying mode. In some implementations, a compressor speed for a compressor of the air conditioner may be determined, and which mode(s) of the air conditioner to allow may be determined based at least partially on the determined compressor speed.Type: GrantFiled: December 13, 2012Date of Patent: November 7, 2017Assignee: Lennox Industries Inc.Inventors: Yi Qu, Pete Hrejsa, Eric Berg
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Patent number: 9759466Abstract: One aspect presents a controller that comprises a control board, a microprocessor located on and electrically coupled to the control board, and a memory coupled to the microprocessor and located on and electrically coupled to the control board. The controller is configured to receive an operating parameter signal and recalculate a first maximum heating % demand to a second maximum heating % demand that is greater than the first maximum heating % demand, when a value of the operating parameter signal exceeds a predetermined value, and operate the HP system based on the second maximum heating % demand.Type: GrantFiled: March 5, 2014Date of Patent: September 12, 2017Assignee: Lennox Industries Inc.Inventors: Rakesh Goel, Eric Berg, Pete Hrejsa
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Patent number: 9719715Abstract: A method of operating a heat pump system is provided, the heat pump system having at least a controller and configured to operate at least two defrost cycles. The method comprises receiving, at the controller, weather data for a defined geographic area proximate to an installed location of the heat pump system; and selecting, based on said weather data, one of the at least two defrost cycles.Type: GrantFiled: September 27, 2013Date of Patent: August 1, 2017Assignee: LENNOX INDUSTRIES INC.Inventors: Yi Qu, Pete Hrejsa
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Publication number: 20150253050Abstract: One aspect presents a controller that comprises a control board, a microprocessor located on and electrically coupled to the control board, and a memory coupled to the microprocessor and located on and electrically coupled to the control board. The controller is configured to receive an operating parameter signal and recalculate a first maximum heating % demand to a second maximum heating % demand that is greater than the first maximum heating % demand, when a value of the operating parameter signal exceeds a predetermined value, and operate the HP system based on the second maximum heating % demand.Type: ApplicationFiled: March 5, 2014Publication date: September 10, 2015Applicant: Lennox Industries Inc.Inventors: Rakesh Goel, Eric Berg, Pete Hrejsa
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Publication number: 20150143825Abstract: In various implementations, defrost operations may be managed. A change in the temperature of a heat exchanger may be determined. A determination whether to allow a defrost operation may be at least partially based on the determined change in the temperature of the heat exchanger.Type: ApplicationFiled: November 27, 2013Publication date: May 28, 2015Applicant: Lennox Industries Inc.Inventors: Yi Qu, Pete Hrejsa