Patents Assigned to Lennox Industries LLC
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Patent number: 10753664Abstract: An HVAC system includes an indoor unit having a return air duct and a supply air duct in an enclosed space. The HVAC system includes an outdoor unit having a variable-speed condenser fan. A first temperature sensor is disposed in at least one of the return air duct, the supply air duct, or an enclosed space. A controller is operatively coupled to the first temperature sensor, and the variable-speed condenser fan. The controller is configured to determine whether at least one of over-cooling or over-heating of air in the enclosed space is occurring. Responsive to a determination that at least one of over-cooling or over-heating of air in the enclosed space is occurring, the controller adjusts a speed of the variable-speed condenser fan.Type: GrantFiled: September 21, 2018Date of Patent: August 25, 2020Assignee: Lennox Industries LLCInventors: Rakesh Goel, Eric Berg
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Patent number: 10641516Abstract: The HVAC system includes an evaporator coil and a metering device fluidly coupled to the evaporator coil via a distribution line. The HVAC system includes a variable-speed circulation fan for circulating air around the evaporator coil. A temperature sensor is thermally exposed to the distribution line. At least one controller is operatively coupled to the temperature sensor and to the variable-speed circulation fan. The at least one controller adjusts a speed of the variable-speed circulation fan to increase latent capacity of the HVAC system responsive to a determination that a temperature of fluid in the distribution line exceeds an optimal distribution line temperature.Type: GrantFiled: May 24, 2019Date of Patent: May 5, 2020Assignee: Lennox Industries LLCInventors: Rakesh Goel, Derek Phillips
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Patent number: 10635060Abstract: A method of controlling operations of an HVAC system includes measuring temperature within an enclosed space, receiving a setpoint temperature within the enclosed space, calculating a temperature difference between the measured temperature and the received setpoint temperature, and determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a first predetermined temperature differential value. If the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to the first predetermined temperature differential value, determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a second predetermined temperature differential value.Type: GrantFiled: June 6, 2019Date of Patent: April 28, 2020Assignee: Lennox Industries LLCInventors: Rosa Maria Leal, Alan Edens Bennett, Krag Wilson Mercer, Farhad Nick Abrishamkar
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Publication number: 20190286084Abstract: A method of controlling operations of an HVAC system includes measuring temperature within an enclosed space, receiving a setpoint temperature within the enclosed space, calculating a temperature difference between the measured temperature and the received setpoint temperature, and determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a first predetermined temperature differential value. If the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to the first predetermined temperature differential value, determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a second predetermined temperature differential value.Type: ApplicationFiled: June 6, 2019Publication date: September 19, 2019Applicant: Lennox Industries LLCInventors: Rosa Maria LEAL, Alan Edens BENNETT, Krag Wilson MERCER, Farhad Nick ABRISHAMKAR
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Publication number: 20190277533Abstract: The HVAC system includes an evaporator coil and a metering device fluidly coupled to the evaporator coil via a distribution line. The HVAC system includes a variable-speed circulation fan for circulating air around the evaporator coil. A temperature sensor is thermally exposed to the distribution line. At least one controller is operatively coupled to the temperature sensor and to the variable-speed circulation fan. The at least one controller adjusts a speed of the variable-speed circulation fan to increase latent capacity of the HVAC system responsive to a determination that a temperature of fluid in the distribution line exceeds an optimal distribution line temperature.Type: ApplicationFiled: May 24, 2019Publication date: September 12, 2019Applicant: Lennox Industries LLCInventors: Rakesh GOEL, Derek Phillips
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Patent number: 10337755Abstract: The HVAC system includes an evaporator coil and a metering device fluidly coupled to the evaporator coil via a distribution line. The HVAC system includes a variable-speed circulation fan for circulating air around the evaporator coil. A temperature sensor is thermally exposed to the distribution line. At least one controller is operatively coupled to the temperature sensor and to the variable-speed circulation fan. The at least one controller adjusts a speed of the variable-speed circulation fan to increase latent capacity of the HVAC system responsive to a determination that a temperature of fluid in the distribution line exceeds an optimal distribution line temperature.Type: GrantFiled: November 30, 2015Date of Patent: July 2, 2019Assignee: Lennox Industries LLCInventors: Rakesh Goel, Derek Phillips
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Patent number: 10338546Abstract: A method of controlling operations of an HVAC system includes measuring temperature within an enclosed space, receiving a setpoint temperature within the enclosed space, calculating a temperature difference between the measured temperature and the received setpoint temperature, and determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a first predetermined temperature differential value. If the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to the first predetermined temperature differential value, determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a second predetermined temperature differential value.Type: GrantFiled: March 2, 2016Date of Patent: July 2, 2019Assignee: Lennox Industries LLCInventors: Rosa Maria Leal, Alan Edens Bennett, Krag Wilson Mercer, Farhad Nick Abrishamkar
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Patent number: 10309679Abstract: A method of controlling a heating, ventilation and air-conditioning (HVAC) system includes measuring an ambient temperature and determining whether the ambient temperature is below a threshold temperature value. Responsive to a determination that the ambient temperature is below the threshold temperature value, measuring a condenser-fan cycle time of the HVAC system and setting a speed of the compressor based on the measured condenser-fan cycle time.Type: GrantFiled: March 1, 2018Date of Patent: June 4, 2019Assignee: Lennox Industries LLCInventors: Siddarth Rajan, John Tran, N., Rakesh Goel, Clay Toombs
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Publication number: 20190024959Abstract: An HVAC system includes an indoor unit having a return air duct and a supply air duct in an enclosed space. The HVAC system includes an outdoor unit having a variable-speed condenser fan. A first temperature sensor is disposed in at least one of the return air duct, the supply air duct, or an enclosed space. A controller is operatively coupled to the first temperature sensor, and the variable-speed condenser fan. The controller is configured to determine whether at least one of over-cooling or over-heating of air in the enclosed space is occurring. Responsive to a determination that at least one of over-cooling or over-heating of air in the enclosed space is occurring, the controller adjusts a speed of the variable-speed condenser fan.Type: ApplicationFiled: September 21, 2018Publication date: January 24, 2019Applicant: Lennox Industries LLCInventors: Rakesh GOEL, Eric BERG
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Patent number: 10161662Abstract: An HVAC system includes an indoor unit having a return air duct and a supply air duct in an enclosed space. The HVAC system includes an outdoor unit having a variable-speed condenser fan. A first temperature sensor is disposed in at least one of the return air duct, the supply air duct, or an enclosed space. A controller is operatively coupled to the first temperature sensor, and the variable-speed condenser fan. The controller is configured to determine whether at least one of over-cooling or over-heating of air in the enclosed space is occurring. Responsive to a determination that at least one of over-cooling or over-heating of air in the enclosed space is occurring, the controller adjusts a speed of the variable-speed condenser fan.Type: GrantFiled: November 30, 2015Date of Patent: December 25, 2018Assignee: Lennox Industries LLCInventors: Rakesh Goel, Eric Berg
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Publication number: 20180187916Abstract: A method of controlling a heating, ventilation and air-conditioning (HVAC) system includes measuring an ambient temperature and determining whether the ambient temperature is below a threshold temperature value. Responsive to a determination that the ambient temperature is below the threshold temperature value, measuring a condenser-fan cycle time of the HVAC system and setting a speed of the compressor based on the measured condenser-fan cycle time.Type: ApplicationFiled: March 1, 2018Publication date: July 5, 2018Applicant: Lennox Industries LLCInventors: Siddarth Rajan, John Tran, Rakesh Goel, Clay Toombs
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Patent number: 9933181Abstract: A method of controlling a heating, ventilation and air-conditioning (HVAC) system includes measuring an ambient temperature and determining whether the ambient temperature is below a threshold temperature value. Responsive to a determination that the ambient temperature is below the threshold temperature value, measuring a condenser-fan cycle time of the HVAC system and setting a speed of the compressor based on the measured condenser-fan cycle time.Type: GrantFiled: February 4, 2016Date of Patent: April 3, 2018Assignee: Lennox Industries LLCInventors: Siddarth Rajan, John Tran, Rakesh Goel, Clay Toombs
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Publication number: 20170254553Abstract: A method of controlling operations of an HVAC system includes measuring temperature within an enclosed space, receiving a setpoint temperature within the enclosed space, calculating a temperature difference between the measured temperature and the received setpoint temperature, and determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a first predetermined temperature differential value. If the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to the first predetermined temperature differential value, determining whether the temperature difference between the measured temperature and the received setpoint temperature is greater than or equal to a second predetermined temperature differential value.Type: ApplicationFiled: March 2, 2016Publication date: September 7, 2017Applicant: Lennox Industries LLCInventors: Rosa Maria LEAL, Alan Edens BENNETT, Krag Wilson MERCER, Farhad Nick ABRISHAMKAR
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Publication number: 20170227246Abstract: A method of controlling a heating, ventilation and air-conditioning (HVAC) system includes measuring an ambient temperature and determining whether the ambient temperature is below a threshold temperature value. Responsive to a determination that the ambient temperature is below the threshold temperature value, measuring a condenser-fan cycle time of the HVAC system and setting a speed of the compressor based on the measured condenser-fan cycle time.Type: ApplicationFiled: February 4, 2016Publication date: August 10, 2017Applicant: Lennox Industries LLCInventors: Siddarth RAJAN, John Tran, Rakesh Goel, Clay Toombs
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Publication number: 20170153052Abstract: An HVAC system includes an indoor unit having a return air duct and a supply air duct in an enclosed space. The HVAC system includes an outdoor unit having a variable-speed condenser fan. A first temperature sensor is disposed in at least one of the return air duct, the supply air duct, or an enclosed space. A controller is operatively coupled to the first temperature sensor, and the variable-speed condenser fan. The controller is configured to determine whether at least one of over-cooling or over-heating of air in the enclosed space is occurring. Responsive to a determination that at least one of over-cooling or over-heating of air in the enclosed space is occurring, the controller adjusts a speed of the variable-speed condenser fan.Type: ApplicationFiled: November 30, 2015Publication date: June 1, 2017Applicant: Lennox Industries LLCInventors: Rakesh GOEL, Eric Berg
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Publication number: 20170153037Abstract: The HVAC system includes an evaporator coil and a metering device fluidly coupled to the evaporator coil via a distribution line. The HVAC system includes a variable-speed circulation fan for circulating air around the evaporator coil. A temperature sensor is thermally exposed to the distribution line. At least one controller is operatively coupled to the temperature sensor and to the variable-speed circulation fan. The at least one controller adjusts a speed of the variable-speed circulation fan to increase latent capacity of the HVAC system responsive to a determination that a temperature of fluid in the distribution line exceeds an optimal distribution line temperature.Type: ApplicationFiled: November 30, 2015Publication date: June 1, 2017Applicant: Lennox Industries LLCInventors: Rakesh Goel, Derek Phillips