Patents by Inventor Calvin Andrew Nelson

Calvin Andrew Nelson 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).

  • Publication number: 20230228467
    Abstract: Embodiments of the present disclosure are directed toward purge units of vapor compression systems, and methods of control thereof, that improve efficiency by selectively activating and deactivating the purge unit in response to one or more conditions to, for example, enable refrigerant-to-air ratios within the purge unit within certain industry standards while still minimizing the durations of the purge cycles. For example, in certain embodiments, these conditions may include conditions within the chiller condenser, time since last purge activation, time since last venting of non-condensables, and combinations thereof.
    Type: Application
    Filed: March 23, 2023
    Publication date: July 20, 2023
    Inventors: David Andrew Bradshaw, Andrew Michael Welch, Curtis C. Crane, Calvin Andrew Nelson
  • Patent number: 11635238
    Abstract: Embodiments of the present disclosure are directed toward purge units of vapor compression systems, and methods of control thereof, that improve efficiency by selectively activating and deactivating the purge unit in response to one or more conditions to, for example, enable refrigerant-to-air ratios within the purge unit within certain industry standards while still minimizing the durations of the purge cycles. For example, in certain embodiments, these conditions may include conditions within the chiller condenser, time since last purge activation, time since last venting of non-condensables, and combinations thereof. By reducing an amount of time that the purge unit would be active without removing a substantial amount non-condensables from the vapor compression system, present embodiments reduce the power consumption of the purge unit, as well as the vapor compression system as a whole.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: April 25, 2023
    Assignee: Johnson Controls Tyco IP Holdings LLP
    Inventors: David Andrew Bradshaw, Andrew Michael Welch, Curtis C. Crane, Calvin Andrew Nelson
  • Patent number: 11466912
    Abstract: Embodiments of the present disclosure are directed toward purge units of vapor compression systems, and methods of control thereof, that selectively activate and deactivate the purge unit in response to one or more conditions to, for example, control refrigerant-to-air ratios while still minimizing the durations of the purge cycles. For example, in certain embodiments, these conditions may include conditions within the chiller condenser, time since last purge activation, time since last venting of non-condensables, and combinations thereof. By reducing an amount of time that the purge unit would be active without removing a substantial amount non-condensables from the vapor compression system, present embodiments reduce the power consumption of the purge unit, as well as the vapor compression system as a whole, while still being responsive to prevent or mitigate a loss of efficiency due to a substantial accumulation of non-condensables in the condenser of the vapor compression system.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: October 11, 2022
    Assignee: Johnson Controls TYCO IP Holdings LLP
    Inventors: David Andrew Bradshaw, Andrew Michael Welch, Curtis C. Crane, Calvin Andrew Nelson
  • Publication number: 20200240685
    Abstract: Embodiments of the present disclosure are directed toward purge units of vapor compression systems, and methods of control thereof, that improve efficiency by selectively activating and deactivating the purge unit in response to one or more conditions to, for example, enable refrigerant-to-air ratios within the purge unit within certain industry standards while still minimizing the durations of the purge cycles. For example, in certain embodiments, these conditions may include conditions within the chiller condenser, time since last purge activation, time since last venting of non-condensables, and combinations thereof.
    Type: Application
    Filed: October 4, 2018
    Publication date: July 30, 2020
    Inventors: David Andrew Bradshaw, Andrew Michael Welch, Curtis C. Crane, Calvin Andrew Nelson
  • Publication number: 20200240690
    Abstract: Embodiments of the present disclosure are directed toward purge units of vapor compression systems, and methods of control thereof, that improve efficiency by selectively activating and deactivating the purge unit in response to one or more conditions to, for example, enable refrigerant-to-air ratios within the purge unit within certain industry standards while still minimizing the durations of the purge cycles. For example, in certain embodiments, these conditions may include conditions within the chiller condenser, time since last purge activation, time since last venting of non-condensables, and combinations thereof.
    Type: Application
    Filed: October 4, 2018
    Publication date: July 30, 2020
    Inventors: David Andrew Bradshaw, Andrew Michael Welch, Curtis C. Crane, Calvin Andrew Nelson