Refrigeration – With means for charging closed refrigeration producing system
Reexamination Certificate
1999-12-22
2001-07-31
Doerrler, William (Department: 3744)
Refrigeration
With means for charging closed refrigeration producing system
C062S077000
Reexamination Certificate
active
06266971
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to refrigerant systems and, more specifically, to a charge valve for a refrigerant system in a motor vehicle.
2. Description of the Related Art
It is known to provide a refrigerant system in a vehicle such as a motor vehicle. Typically, the refrigerant system includes a plurality of refrigerant system components such as aluminum tubing through which a refrigerant flows. To provide access to the refrigerant system, it is known to provide an aperture in the aluminum tubing and to dispose a refrigerant system device in the aperture. The refrigerant system device is brazed to the aluminum tubing. Also, to charge the refrigerant system, it is known to provide an aperture in the aluminum tubing and to dispose a refrigerant system charging device in the aperture. The refrigerant system charging device is also brazed to the aluminum tubing.
Although the above refrigerant system has worked, it is desirable to provide a charge valve that allows charging of the refrigerant system when transcritical carbon dioxide is used as the refrigerant. It is also desirable to provide a charge valve for a refrigerant system that precludes permeation and has zero leakage. It is further desirable to provide a charge valve for a refrigerant system that uses metal to metal sealing. Therefore, there is a need in the art to provide a charge valve for a refrigerant system of a motor vehicle that meets these desires.
SUMMARY OF THE INVENTION
Accordingly, the present invention is a refrigerant charge valve for a refrigerant system including a housing adapted to receive a refrigerant system component of the refrigerant system having refrigerant flowing therethrough. The housing has a cavity and a passageway fluidly communicating with a refrigerant charge port of the refrigerant system component. The refrigerant charge valve also includes a valve core disposed in the cavity of the housing to open and close the passageway to allow and prevent access to the refrigerant.
One advantage of the present invention is that a refrigerant charge valve is provided for a refrigerant system. Another advantage of the present invention is that the refrigerant charge valve allows charging of a refrigerant system for a motor vehicle when transcritical carbon dioxide is used as the refrigerant. Yet another advantage of the present invention is that the refrigerant charge valve uses metal to metal sealing for primary seal and secondary seals. Still another advantage of the present invention is that the refrigerant charge valve has zero leakage and precludes permeation and decompression.
Other features and advantages of the present invention will be readily appreciated, as the same becomes better understood, after reading the subsequent description taken in conjunction with the accompanying drawings.
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Nader, Jr. Joseph
Schroder Fred Georg
Zeng Zhongping
Doerrler William
Jones Melvin
Shelton Larry I.
Visteon Global Technologies Inc.
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