Patents Assigned to IGC-Polycold Systems, Inc.
  • Liquid chiller evaporator
    Patent number: 6886361
    Abstract: A shell and coil type heat exchanger evaporator provides cooling for industrial coolants characterized by high viscosity and a poor heat transfer coefficient. A large heat transfer surface area is provided within a limited volume, and without a high coolant pressure drop. A short initial cool down period is provided due to minimized heat exchanger mass and minimized volume of liquid coolant in the heat exchanger during initial cool down.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: May 3, 2005
    Assignee: IGC-Polycold Systems, Inc.
    Inventor: Kevin Flynn
  • High efficiency very-low temperature mixed refrigerant system with rapid cool down
    Patent number: 6722145
    Abstract: The present invention is a refrigeration system that uses a nonflammable, nonchlorinated refrigerant mixture to achieve very-low temperatures using a single compressor. The system is characterized by both high efficiency and rapid cool down time.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: April 20, 2004
    Assignee: IGC-Polycold Systems, Inc.
    Inventors: Oleg Podtchereniaev, Kevin Flynn, Tarrurisa Apparao, Mikhail Bolarski
  • Mixed refrigerant temperature control using a pressure regulating valve
    Patent number: 6560981
    Abstract: A standard refrigeration pressure regulating valve limits the minimum temperature produced by a refrigeration process, which uses a refrigerant mixture including at least two components whose normal boiling points differ by at least 50C. Limiting the lowest temperature prevents freezout of the individual refrigerant.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: May 13, 2003
    Assignee: IGC-Polycold Systems Inc.
    Inventor: Kevin Flynn
  • Nonflammable mixed refrigerants (MR) for use with very low temperature throttle-cycle refrigeration systems
    Patent number: 6502410
    Abstract: Refrigerants containing HCFC's are replaced with new blends by using R-236fa and R-125, or R-125 with R-245fa, or R-236ea, or R-134a with R-236fa in place of HCFC's. No hardware or oil composition changes are required to maintain temperatures, pressures and capacity substantially unchanged in a refrigeration system.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: January 7, 2003
    Assignee: IGC-Polycold Systems, Inc.
    Inventors: Oleg Podtchereniaev, Mikhail Boiarski, Tamirisa Apparao, Kevin Flynn, Boris Yudin, Vladimir Mogarichni