Patents by Inventor Shobin Balakrishnan
Shobin Balakrishnan 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: 11800940Abstract: A method for reducing sweating in a temperature-controlled display device includes receiving values of an ambient temperature, a door frame temperature, and relative humidity. The method can also include estimating a value of a dewpoint temperature using the values of the ambient temperature and the relative humidity. The method can also include determining control decisions for a door frame heater of the temperature-controlled display device using the value of the dewpoint temperature and the door frame temperature, and transitioning the door frame heater between an on-state and an off-state using the control decisions to maintain the value of the door frame temperature at or above the value of the dewpoint temperature.Type: GrantFiled: September 20, 2021Date of Patent: October 31, 2023Assignee: Hill Phoenix, Inc.Inventors: Naresh Kumar Krishnamoorthy, Shobin Balakrishnan
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Publication number: 20230221051Abstract: A refrigerated display case having a housing defining a temperature controlled space and a refrigeration system coupled to the housing is provided. The refrigeration system is configured to be operable to affect a temperature of the temperature controlled space. The refrigeration system includes an actuator, a controller, and a sensor. The controller is configured to continuously update a stored position of the actuator based on measurement of an electric current provided to the actuator, retrieve the stored position after a power failure, and restart control based on the stored position of the actuator. The sensor is configured to communicate with the controller.Type: ApplicationFiled: March 15, 2023Publication date: July 13, 2023Inventors: Naresh Kumar Krishnamoorthy, Shobin Balakrishnan
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Publication number: 20230160615Abstract: A method of detecting electrical failure in a refrigeration system is provided. The method includes determining whether a present superheat of the refrigeration system is between a maximum superheat and a minimum superheat for the refrigeration system, the maximum superheat and the minimum superheat defining a normal operating range. The method also includes detecting an electrical property of an expansion valve assembly of the refrigeration system responsive to the superheat being outside the normal operating range. The method further includes determining whether the expansion valve assembly as experienced an electrical failure based on at least the electrical property. A signal indicating that the expansion valve has experienced an electrical failure is generated based on a determination that the expansion valve assembly has experienced the electrical failure.Type: ApplicationFiled: November 28, 2022Publication date: May 25, 2023Inventors: Naresh Kumar Krishnamoorthy, Shobin Balakrishnan
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Patent number: 11624536Abstract: A refrigerated display case having a housing defining a temperature controlled space and a refrigeration system coupled to the housing is provided. The refrigeration system is configured to be operable to affect a temperature of the temperature controlled space. The refrigeration system includes an actuator, a controller, and a sensor. The controller is configured to continuously update a stored position of the actuator based on measurement of an electric current provided to the actuator, retrieve the stored position after a power failure, and restart control based on the stored position of the actuator. The sensor is configured to communicate with the controller.Type: GrantFiled: May 7, 2020Date of Patent: April 11, 2023Assignee: Hill Phoenix, Inc.Inventors: Naresh Kumar Krishnamoorthy, Shobin Balakrishnan
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Patent number: 11512884Abstract: A method of detecting electrical failure in a refrigeration system is provided. The method includes determining whether a present superheat of the refrigeration system is between a maximum superheat and a minimum superheat for the refrigeration system, the maximum superheat and the minimum superheat defining a normal operating range. The method also includes detecting an electrical property of an expansion valve assembly of the refrigeration system responsive to the superheat being outside the normal operating range. The method further includes determining whether the expansion valve assembly as experienced an electrical failure based on at least the electrical property. A signal indicating that the expansion valve has experienced an electrical failure is generated based on a determination that the expansion valve assembly has experienced the electrical failure.Type: GrantFiled: May 7, 2020Date of Patent: November 29, 2022Assignee: Hill Phoenix, Inc.Inventors: Naresh Kumar Krishnamoorthy, Shobin Balakrishnan
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Publication number: 20220071412Abstract: A method for reducing sweating in a temperature-controlled display device includes receiving values of an ambient temperature, a door frame temperature, and relative humidity. The method can also include estimating a value of a dewpoint temperature using the values of the ambient temperature and the relative humidity. The method can also include determining control decisions for a door frame heater of the temperature-controlled display device using the value of the dewpoint temperature and the door frame temperature, and transitioning the door frame heater between an on-state and an off-state using the control decisions to maintain the value of the door frame temperature at or above the value of the dewpoint temperature.Type: ApplicationFiled: September 20, 2021Publication date: March 10, 2022Inventors: Naresh Kumar Krishnamoorthy, Shobin Balakrishnan
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Publication number: 20210348819Abstract: A refrigerated display case having a housing defining a temperature controlled space and a refrigeration system coupled to the housing is provided. The refrigeration system is configured to be operable to affect a temperature of the temperature controlled space. The refrigeration system includes an actuator, a controller, and a sensor. The controller is configured to continuously update a stored position of the actuator based on measurement of an electric current provided to the actuator, retrieve the stored position after a power failure, and restart control based on the stored position of the actuator. The sensor is configured to communicate with the controller.Type: ApplicationFiled: May 7, 2020Publication date: November 11, 2021Applicant: Hill Phoenix, Inc.Inventors: NARESH KUMAR KRISHNAMOORTHY, SHOBIN BALAKRISHNAN
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Publication number: 20210348818Abstract: A method of detecting electrical failure in a refrigeration system is provided. The method includes determining whether a present superheat of the refrigeration system is between a maximum superheat and a minimum superheat for the refrigeration system, the maximum superheat and the minimum superheat defining a normal operating range. The method also includes detecting an electrical property of an expansion valve assembly of the refrigeration system responsive to the superheat being outside the normal operating range. The method further includes determining whether the expansion valve assembly as experienced an electrical failure based on at least the electrical property. A signal indicating that the expansion valve has experienced an electrical failure is generated based on a determination that the expansion valve assembly has experienced the electrical failure.Type: ApplicationFiled: May 7, 2020Publication date: November 11, 2021Applicant: Hill Phoenix, Inc.Inventors: NARESH KUMAR KRISHNAMOORTHY, SHOBIN BALAKRISHNAN
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Patent number: 11160393Abstract: A method for reducing sweating in a temperature-controlled display device includes receiving values of an ambient temperature, a door frame temperature, and relative humidity. The method can also include estimating a value of a dewpoint temperature using the values of the ambient temperature and the relative humidity. The method can also include determining control decisions for a door frame heater of the temperature-controlled display device using the value of the dewpoint temperature and the door frame temperature, and transitioning the door frame heater between an on-state and an off-state using the control decisions to maintain the value of the door frame temperature at or above the value of the dewpoint temperature.Type: GrantFiled: October 30, 2019Date of Patent: November 2, 2021Assignee: Hill Phoenix, Inc.Inventors: Naresh Kumar Kirshnamoorthy, Shobin Balakrishnan
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Publication number: 20210127854Abstract: A method for reducing sweating in a temperature-controlled display device includes receiving values of an ambient temperature, a door frame temperature, and relative humidity. The method can also include estimating a value of a dewpoint temperature using the values of the ambient temperature and the relative humidity. The method can also include determining control decisions for a door frame heater of the temperature-controlled display device using the value of the dewpoint temperature and the door frame temperature, and transitioning the door frame heater between an on-state and an off-state using the control decisions to maintain the value of the door frame temperature at or above the value of the dewpoint temperature.Type: ApplicationFiled: October 30, 2019Publication date: May 6, 2021Applicant: Hill Phoenix, Inc.Inventors: Naresh Kumar Krishnamoorthy, Shobin Balakrishnan