Patents by Inventor Lou Monnier

Lou Monnier 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).

  • Patent number: 9980413
    Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: May 22, 2018
    Assignee: Liebert Corporation
    Inventors: John F. Judge, Timothy J. Schrader, Stephen Sillato, Roger Noll, Gary A. Helmink, Pierpaolo Barbato, Giuseppe Dalla Mana, Lou Monnier, Zhiyong Lin, Benedict J. Dolcich, Daniel J. Schutte, Greg Haggy
  • Patent number: 9829233
    Abstract: A method including: determining a cooling value; and comparing the cooling value to an activation point of a lead compressor. The lead compressor is in a tandem set of scroll compressors of a cooling system. The tandem set of compressors comprises a lag compressor. The method further includes: activating the lead compressor when the cooling value is greater than the activation point; activating the lag compressor subsequent to activating the lead compressor; and determining whether conditions exist including: an alarm associated with the lag compressor being generated, and the lead compressor being deactivated. The method further includes deactivating the lag compressor when at least one of the conditions exists in the cooling system.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: November 28, 2017
    Assignee: Liebert Corporation
    Inventors: Roger Noll, Lou Monnier, Zhiyong Lin, Daniel J. Schutte, Benedict J. Dolcich
  • Patent number: 9476624
    Abstract: A method including determining whether an OFF criterion is satisfied for a lag compressor of a tandem set of scroll compressors. The tandem set of scroll compressors includes a lead compressor. The method further includes: initiating at least one process when the OFF criterion is satisfied; and maintaining the lag compressor in an ON state for a predetermined period subsequent to the OFF criterion being satisfied. The at least one process includes at least one of: operating the lead compressor at a maximum level; overriding a motor overload protection method, wherein the motor overload protection method protects motors of the lead compressor and the lag compressor; and overriding a proportional integral derivative (PID) method to reduce a speed of a condenser fan. The PID method controls the speed of the condenser fan. A system including the lag compressor module and the lead compressor module.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: October 25, 2016
    Assignee: Liebert Corporation
    Inventors: Roger Noll, Lou Monnier, Gary A. Helmink, Zhiyong Lin, Daniel J. Schutte, Benedict J. Dolcich
  • Patent number: 9477235
    Abstract: A method includes determining a pressure difference across a scroll compressor of a cooling system. The pressure difference is compared to a minimum differential pressure value. Pressure differences across the scroll compressor that are less than the minimum differential pressure value are associated with unloading the scroll compressor. Parameters including a pressure set point value and an absolute minimum pressure value are increased when the pressure difference is less than the minimum differential pressure value. Subsequent to the increasing of the parameters, the parameters are decreased when the pressure difference is greater than a sum of the minimum differential pressure value and a hysteresis value.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: October 25, 2016
    Assignee: Liebert Corporation
    Inventors: Roger Noll, Lou Monnier, Gary A. Helmink
  • Publication number: 20150230367
    Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.
    Type: Application
    Filed: April 22, 2015
    Publication date: August 13, 2015
    Applicant: Liebert Corporation
    Inventors: John F. JUDGE, Timothy J. SCHRADER, Stephen SILLATO, Roger NOLL, Gary A. HELMINK, Pierpaolo BARBATO, Giuseppe Dalla MANA, Lou MONNIER, Zhiyong LIN, Benedict J. DOLCICH, Daniel J. SCHUTTE, Greg HAGGY
  • Patent number: 9038404
    Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: May 26, 2015
    Assignee: Liebert Corporation
    Inventors: John F. Judge, Timothy J. Schrader, Stephen Sillato, Roger Noll, Gary A. Helmink, Pierpaolo Barbato, Giuseppe Dalla Mana, Lou Monnier, Zhiyong Lin, Benedict J. Dolcich, Daniel J. Schutte, Greg Haggy, Thomas Harvey, Zongtao Lu
  • Patent number: 8881541
    Abstract: A cooling system has a tandem compressor, a condenser, an electronic expansion valve and an evaporator arranged in a direct expansion cooling circuit. The tandem compressor includes a variable capacity compressor and a fixed capacity compressor. A controller controls the electronic expansion valve and selects which of a plurality of superheat control modes to use in operating the electronic expansion valve based on control parameters and a current operating status of each of the variable capacity compressor and fixed capacity compressor of the tandem compressor.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: November 11, 2014
    Assignee: Liebert Corporation
    Inventors: Roger Noll, Gary A. Helmink, Pierpaolo Barbato, Giuseppe Dalla Mana, Lou Monnier
  • Publication number: 20140230467
    Abstract: A method including determining whether an OFF criterion is satisfied for a lag compressor of a tandem set of scroll compressors. The tandem set of scroll compressors includes a lead compressor. The method further includes: initiating at least one process when the OFF criterion is satisfied; and maintaining the lag compressor in an ON state for a predetermined period subsequent to the OFF criterion being satisfied. The at least one process includes at least one of: operating the lead compressor at a maximum level; overriding a motor overload protection method, wherein the motor overload protection method protects motors of the lead compressor and the lag compressor; and overriding a proportional integral derivative (PID) method to reduce a speed of a condenser fan. The PID method controls the speed of the condenser fan.
    Type: Application
    Filed: January 31, 2014
    Publication date: August 21, 2014
    Inventors: Roger NOLL, Lou MONNIER, Gary A. HELMINK, Zhiyong LIN, Daniel J. SCHUTTE, Benedict J. DOLCICH
  • Publication number: 20140230466
    Abstract: A method including: determining a cooling value; and comparing the cooling value to an activation point of a lead compressor. The lead compressor is in a tandem set of scroll compressors of a cooling system. The tandem set of compressors comprises a lag compressor. The method further includes: activating the lead compressor when the cooling value is greater than the activation point; activating the lag compressor subsequent to activating the lead compressor; and determining whether conditions exist including: an alarm associated with the lag compressor being generated, and the lead compressor being deactivated. The method further includes deactivating the lag compressor when at least one of the conditions exists in the cooling system.
    Type: Application
    Filed: January 31, 2014
    Publication date: August 21, 2014
    Inventors: Roger NOLL, Lou MONNIER, Zhiyong LIN, Daniel J. SCHUTTE, Benedict J. DOLCICH
  • Publication number: 20140236361
    Abstract: A method includes determining a pressure difference across a scroll compressor of a cooling system. The pressure difference is compared to a minimum differential pressure value. Pressure differences across the scroll compressor that are less than the minimum differential pressure value are associated with unloading the scroll compressor. Parameters including a pressure set point value and an absolute minimum pressure value are increased when the pressure difference is less than the minimum differential pressure value. Subsequent to the increasing of the parameters, the parameters are decreased when the pressure difference is greater than a sum of the minimum differential pressure value and a hysteresis value.
    Type: Application
    Filed: January 31, 2014
    Publication date: August 21, 2014
    Inventors: Roger NOLL, Lou MONNIER, Gary A. HELMINK
  • Publication number: 20130098085
    Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.
    Type: Application
    Filed: April 13, 2012
    Publication date: April 25, 2013
    Applicant: Liebert Corporation
    Inventors: John F. Judge, Timothy J. Schrader, Stephen Sillato, Roger Noll, Gary A. Helmink, Pierpaolo Barbato, Giuseppe Dalla Mana, Lou Monnier, Zhiyong Lin, Benedict J. Dolcich, Daniel J. Schutte, Greg Haggy, Thomas Harvey, Zongtao Lu
  • Publication number: 20130098087
    Abstract: A cooling system has a tandem compressor, a condenser, an electronic expansion valve and an evaporator arranged in a direct expansion cooling circuit. The tandem compressor includes a variable capacity compressor and a fixed capacity compressor. A controller controls the electronic expansion valve and selects which of a plurality of superheat control modes to use in operating the electronic expansion valve based on control parameters and a current operating status of each of the variable capacity compressor and fixed capacity compressor of the tandem compressor.
    Type: Application
    Filed: April 13, 2012
    Publication date: April 25, 2013
    Applicant: Liebert Corporation
    Inventors: Roger Noll, Gary A. Helmink, Pierpaolo Barbato, Giuseppe Dalla Mana, Lou Monnier
  • Publication number: 20130091874
    Abstract: A variable flow refrigerant system having a compressor and one or a plurality of evaporators. The suction at one or the plurality of evaporators for the input to the compressor is monitored and generally corresponds to the minimum pressure of the refrigerant. The pressure is associated with a temperature and is controlled to always be above the dew point temperature of the room.
    Type: Application
    Filed: April 3, 2012
    Publication date: April 18, 2013
    Applicant: LIEBERT CORPORATION
    Inventors: Stephen Sillato, Timothy J. Schrader, Lou Monnier, John F. Judge