Patents by Inventor Vagn Helberg

Vagn Helberg 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).

  • Method and a device for detecting flash gas
    Patent number: 7681407
    Abstract: A method and a device for detecting flash gas in a vapor-compression refrigeration or heat pump system comprising a compressor, a condenser, an expansion device, and an evaporator interconnected by conduits providing a flow path for a refrigerant, by determining a first rate of heat flow of a heat exchange fluid flow across a heat exchanger of the system and a second rate of heat flow of the refrigerant across the heat exchanger, and using the rates of heat flow for establishing an energy balance from which a parameter for monitoring the refrigerant flow is derived, to thereby provide early detection of flash gas with a minimum number of false alarms.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: March 23, 2010
    Assignee: Danfoss A/S
    Inventors: Claus Thybo, Bjarne Dindler Rasmussen, Steen Lauridsen, Vagn Helberg
  • Method and a device for detecting flash gas
    Publication number: 20050166609
    Abstract: A method and a device for detecting flash gas in a vapour-compression refrigeration or heat pump system comprising a compressor, a condenser, an expansion device, and an evaporator interconnected by conduits providing a flow path for a refrigerant, by determining a first rate of heat flow of a heat exchange fluid flow across a heat exchanger of the system and a second rate of heat flow of the refrigerant across the heat exchanger, and using the rates of heat flow for establishing an energy balance from which a parameter for monitoring the refrigerant flow is derived, to thereby provide early detection of flash gas with a minimum number of false alarms.
    Type: Application
    Filed: July 3, 2003
    Publication date: August 4, 2005
    Applicant: Danfoss A/S
    Inventors: Claus Thybo, Bjarne Rasmussen, Steen Lauridsen, Vagn Helberg