Patents by Inventor Larry D. Burns
Larry D. Burns 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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Patent number: 11835244Abstract: An HVAC/R system having: an HVAC/R component that has a heat exchanger, the HVAC/R component configured to allow a refrigerant to flow therethrough; a housing with the heat exchanger disposed there therein, and a supply side air conduit connected to the housing, the supply side air conduit being operably coupled to the HVAC/R component; a supply side leak mitigation damper operably coupled to the supply side air conduit; and wherein the supply side leak mitigation conduit is configured to selectively block airflow through the supply side air conduit.Type: GrantFiled: September 10, 2020Date of Patent: December 5, 2023Assignee: CARRIER CORPORATIONInventors: Richard G. Lord, Larry D. Burns
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Patent number: 11761703Abstract: A refrigerated transport system comprises a body enclosing a refrigerated compartment. A refrigeration system (29) comprises first and second vapor compression loops each having: a refrigerant charge; a compressor (36A,B) for driving the refrigerant of the refrigerant charge; a first heat exchanger (38A,B) positioned to reject heat to an external environment in a cooling mode; and a second heat exchanger (42A,B) positioned to absorb heat from the refrigerated compartment in the cooling mode.Type: GrantFiled: November 9, 2016Date of Patent: September 19, 2023Assignee: Carrier CorporationInventors: Renee A. Eddy, Jeffrey J. Burchill, Giorgio Rusignuolo, Robert A. Chopko, Larry D. Burns, Ciara N. Poolman, Paul Papas, Ivan Rydkin
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Publication number: 20230064418Abstract: A refrigeration system configured for controlling operation of a compressor is disclosed. The refrigeration system comprises an electronic expansion device operatively coupled with the compressor. The refrigeration system comprises a controller operatively coupled with the electronic expansion device. The controller is configured to control the electronic expansion valve based on a superheat setpoint range. The controller is further configured to adjust the superheat setpoint range in response to an operating point of the compressor being within a threshold distance from a boundary of an operational envelope for the compressor.Type: ApplicationFiled: July 18, 2022Publication date: March 2, 2023Inventors: Matthew Clark, Larry D. Burns, Jun Pyo Lee, Keyu Li, Runfu Shi
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Publication number: 20220333806Abstract: Disclosed is an air conditioning system having: a first HVAC assembly comprising an indoor heat exchanger and a fan; a first sensor, configured to sense a first temperature reading, operably coupled to the indoor heat exchanger; a second sensor, configured to sense a second temperature reading, positioned downstream of the first sensor and detached from the indoor heat exchanger; and a system controller configured to activate the fan to deliver airflow across the indoor heat exchanger when the difference between the first temperature reading and the second temperature reading is greater than or equal to a predetermined threshold, the temperate differing being checked when the first HVAC assembly is in an inactive mode and the fan and a compressor operably connected to the first HVAC assembly are in an inactive mode.Type: ApplicationFiled: September 11, 2020Publication date: October 20, 2022Inventors: Richard G. Lord, Larry D. Burns
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Publication number: 20220325929Abstract: A method for diluting a leaked refrigerant in a refrigeration system according to an example of the present disclosure includes operating the refrigeration system in a purge mode based on at least one purge condition prior to initiating a compressor of the refrigeration system. A refrigeration system according to an example of the present disclosure includes a compressor configured to compress refrigerant in a refrigerant line, a heat exchanger configured to exchange heat with the refrigerant line in a heat exchange mode, a fan configured to pass air through the heat exchanger to an indoor space, and a controller configured to operate the refrigeration system in a purge mode based on at least one purge condition prior to initiating the compressor.Type: ApplicationFiled: September 10, 2020Publication date: October 13, 2022Inventors: Richard G. Lord, Larry D. Burns, Cheng Chen
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Publication number: 20220307711Abstract: Disclosed is a HVAC/R system including: an HVAC/R component that has a heat exchanger, the HVAC/R component configured to allow a refrigerant to flow therethrough; a housing with the heat exchanger disposed there therein, and a supply side air conduit connected to the housing, the supply side air conduit being operably coupled to the HVAC/R component; a supply side leak mitigation damper operably coupled to the supply side air conduit; and wherein the supply side leak mitigation conduit is configured to selectively block airflow through the supply side air conduit.Type: ApplicationFiled: September 10, 2020Publication date: September 29, 2022Inventors: Richard G. Lord, Larry D. Burns
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Patent number: 11408624Abstract: A refrigerant detection assembly for detecting moderate-to-low GWP value refrigerants, an air conditioning system for incorporating the same, and a method of detecting refrigerant leaks using the refrigerant detection assembly are provided. The refrigerant detection assembly may be disposed proximate to an indoor heat exchanger. The refrigerant detection assembly includes a nondispersive infrared (NDIR) sensor, a fan disposed adjacent to the nondispersive infrared sensor, the fan configured to direct a sample to the nondispersive infrared sensor, and a controller operatively connected to the nondispersive infrared sensor and the fan. The controller is configured to operate the fan in constant operation and trigger a response when the refrigerant detection assembly detects at least 25% lower flammability limit (LWL) in the sample.Type: GrantFiled: September 25, 2020Date of Patent: August 9, 2022Assignee: Carrier CorporationInventors: Sotiri T. Hovardas, Larry D. Burns, Mark E. Hemphill
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Publication number: 20220049879Abstract: A refrigeration system includes a compressor connected to a first heat exchanger and a second heat exchanger. An expansion device is connected between the first heat exchanger and the second heat exchanger. A ratio of a volume of the first heat exchanger to a volume of the second heat exchanger is between 0.6 and 1.8.Type: ApplicationFiled: September 9, 2020Publication date: February 17, 2022Inventors: Larry D. Burns, Richard G. Lord
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Publication number: 20220042727Abstract: An outdoor HVAC unit includes a housing. A compressor is located within the housing. A heat exchanger is located within the housing and is in fluid communication with the compressor. At least one expansion device is located within the housing and is in fluid communication with the heat exchanger.Type: ApplicationFiled: September 9, 2020Publication date: February 10, 2022Inventors: Cheng Chen, Larry D. Burns
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Patent number: 11092566Abstract: An HVAC system is provided having an air supply system, a refrigerant circuit configured to condition air in the air supply system, and an electrochemical sensor configured to detect a refrigerant leak from the refrigerant circuit.Type: GrantFiled: October 11, 2019Date of Patent: August 17, 2021Assignee: CARRIER CORPORATIONInventors: Lei Chen, Zhiwei Yang, Warren Clough, Larry D. Burns, Ivan Rydkin
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Publication number: 20210247096Abstract: A contactor, and an air conditioning system incorporating the contactor are provided. The contactor includes a body with an upper surface, a line-side electrical terminal located on one end of the body, a load-side electrical terminal located on the other side of the body, a switching element within the body, the switching element coupled between the line-side electrical terminal and the load-side electrical terminal, and a refrigerant mitigating element disposed on the upper surface. The line-side electrical terminal is configured to receive electrical power from an electrical grid. The load-side electrical terminal is configured to transfer at least a portion of the electrical power to at least one component of the outdoor unit. The switching element is configured to electrically connect the line-side electrical terminal and the load-side electrical terminal when activated. The refrigerant mitigating element may help mitigate the ignition of a refrigerant.Type: ApplicationFiled: January 20, 2021Publication date: August 12, 2021Inventors: Sotiri T. Hovardas, Larry D. Burns
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Patent number: 11079149Abstract: A mitigation damper operably coupled to a return conduit. The return conduit includes an opening. The mitigation damper is positioned adjacent to the opening. The mitigation damper is configured to selectively allow airflow through the opening in response to a detected refrigerant leak.Type: GrantFiled: May 18, 2016Date of Patent: August 3, 2021Assignee: CARRIER CORPORATIONInventors: Paul Papas, Parmesh Verma, Richard G. Lord, Larry D. Burns
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Publication number: 20210207831Abstract: A method for a refrigeration system according to an example of the present disclosure includes monitoring a performance characteristic of a refrigeration system, and based on the performance characteristic deviating from a predefined expected value by more than a predefined threshold: determining that the refrigeration system is leaking refrigerant, and operating a fan configured to pass air through a heat exchanger of the refrigeration system to dissipate the leaked refrigerant. A refrigeration system is also disclosed that is operable to detect and mitigate refrigerant leaks.Type: ApplicationFiled: September 10, 2020Publication date: July 8, 2021Inventors: Richard G. Lord, Larry D. Burns, Cheng Chen
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Publication number: 20210108820Abstract: A refrigerant detection assembly for detecting moderate-to-low GWP value refrigerants, an air conditioning system for incorporating the same, and a method of detecting refrigerant leaks using the refrigerant detection assembly are provided. The refrigerant detection assembly may be disposed proximate to an indoor heat exchanger. The refrigerant detection assembly includes a nondispersive infrared (NDIR) sensor, a fan disposed adjacent to the nondispersive infrared sensor, the fan configured to direct a sample to the nondispersive infrared sensor, and a controller operatively connected to the nondispersive infrared sensor and the fan. The controller is configured to operate the fan in constant operation and trigger a response when the refrigerant detection assembly detects at least 25% lower flammability limit (LWL) in the sample.Type: ApplicationFiled: September 25, 2020Publication date: April 15, 2021Inventors: Sotiri T. Hovardas, Larry D. Burns, Mark E. Hemphill
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Patent number: 10670322Abstract: A refrigerated transport system (20) comprises a body (22) enclosing a refrigerated compartment (69). A refrigeration system (30) comprises: a vapor compression loop (31) having a first heat exchanger (38) positioned to reject heat to an external environment in a cooling mode. A heat transfer loop (32) has a second heat exchanger (58) positioned to absorb heat from the refrigerated compartment in the cooling mode. An inter-loop heat exchanger (44) has a first leg (42) along the vapor compression loop and a second leg (43) along the heat transfer loop in heat exchange relation with the first leg.Type: GrantFiled: November 9, 2016Date of Patent: June 2, 2020Assignee: Carrier CorporationInventors: Renee A. Eddy, Jeffrey J. Burchill, Giorgio Rusignuolo, Robert A. Chopko, Larry D. Burns, Ivan Rydkin, Ciara N. Poolman, Paul Papas, Parmesh Verma
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Patent number: 10648702Abstract: A system (20; 300) comprises: a vapor compression loop (38; 338); a low-pressure or medium-pressure refrigerant in the loop; a centrifugal compressor (42) along the vapor compression loop and comprising: a housing (120); an inlet (44); an outlet (46); an impeller (140); an electric motor (122) coupled to the impeller to drive rotation of the impeller; and one or more refrigerant-lubricated bearings (130, 132).Type: GrantFiled: August 11, 2016Date of Patent: May 12, 2020Assignee: Carrier CorporationInventors: Parmesh Verma, Frederick J. Cogswell, William T. Cousins, Vishnu M. Sishtla, Ulf J. Jonsson, Larry D. Burns
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Publication number: 20200049362Abstract: An HVAC system is provided having an air supply system, a refrigerant circuit configured to condition air in the air supply system, and an electrochemical sensor configured to detect a refrigerant leak from the refrigerant circuit.Type: ApplicationFiled: October 11, 2019Publication date: February 13, 2020Inventors: Lei Chen, Zhiwei Yang, Warren Clough, Larry D. Burns, Ivan Rydkin
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Patent number: 10488065Abstract: An HVAC system is provided having an air supply system, a refrigerant circuit configured to condition air in the air supply system, and an electrochemical sensor configured to detect a refrigerant leak from the refrigerant circuit.Type: GrantFiled: December 8, 2015Date of Patent: November 26, 2019Assignee: CARRIER CORPORATIONInventors: Lei Chen, Zhiwei Yang, Warren Clough, Larry D. Burns, Ivan Rydkin
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Publication number: 20180347896Abstract: A refrigerated transport system comprises a body enclosing a refrigerated compartment. A refrigeration system (29) comprises first and second vapor compression loops each having: a refrigerant charge; a compressor (36A,B) for driving the refrigerant of the refrigerant charge; a first heat exchanger (38A,B) positioned to reject heat to an external environment in a cooling mode; and a second heat exchanger (42A,B) positioned to absorb heat from the refrigerated compartment in the cooling mode.Type: ApplicationFiled: November 9, 2016Publication date: December 6, 2018Applicant: Carrier CorporationInventors: Renee A. Eddy, Jeffrey J. Burchill, Giorgio Rusignuolo, Robert A. Chopko, Larry D. Burns, Ciara N. Poolman, Paul Papas, Ivan Rydkin
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Publication number: 20180327179Abstract: A refrigerated transport system (20) comprises: a body (22) enclosing a refrigerated compartment. A refrigeration system (30) comprises: a charge of refrigerant; a compressor (36) for driving the refrigerant along a refrigerant flowpath (34); a first heat exchanger (38) along the refrigerant flowpath and positioned to reject heat to an external environment in a cooling mode; and a second heat exchanger (42) along the refrigerant flowpath and positioned to absorb heat from the refrigerated compartment in the cooling mode. The refrigerated transport system has a detector (232) for detecting leakage of the refrigerant.Type: ApplicationFiled: November 9, 2016Publication date: November 15, 2018Applicant: Carrier CorporationInventors: Paul Papas, Ciara N. Poolman, Larry D. Burns, Giorgio Rusignuolo, Renee A. Eddy, Michael J. Dormer, Robert A. Chopko, Jeffrey J. Burchill, Ivan Rydkin