Patents by Inventor Peter P. Narreau

Peter P. Narreau 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).

  • Economizer control for two-stage compressor systems
    Patent number: 5582022
    Abstract: In a refrigeration system having low and high stage compressors and a subcooler or economizer, economizer gas is selectively supplied to the compressor motors for cooling and to the suction of the high stage to increase capacity. By selectively controlling the delivery of the economizer gas, efficiency of the refrigeration system is increased.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: December 10, 1996
    Assignee: Carrier Corporation
    Inventors: Anton D. Heinrichs, Peter P. Narreau
  • Electronic control of liquid cooled compressor motors
    Patent number: 5475985
    Abstract: Liquid refrigerant is injected into the motor of a motor-compressor to cool the motor. Refrigerant is also injected to control the discharge temperature of the compressor. The refrigerant for controlling the discharge temperature may be either excess refrigerant for cooling the motor or refrigerant injected into the compressor under the control of a thermal expansion valve.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: December 19, 1995
    Assignee: Carrier Corporation
    Inventors: Anton D. Heinrichs, Peter P. Narreau
  • Economizer control with variable capacity
    Patent number: 5095712
    Abstract: A refrigeration circuit is provided in which economizer control is provided together with variable capacity control. Constant cooling is achieved by controlling an economizer cycle responsive to the suction pressure of the compressor. Additionally, compressor discharge temperature is controlled by controlling the portion of liquid refrigerant supplied to the interstage line.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: March 17, 1992
    Assignee: Carrier Corporation
    Inventor: Peter P. Narreau