Linearly actuated automatic fresh air exchange

Details Linearly actuated automatic fresh air exchange Linearly actuated automatic fresh air exchange

2005-09-20

2005-09-20

Jones, Melvin (Department: 3744)

Refrigeration

Gas controller or director

Cooled gas directed relative to cooled enclosure

C062S190000, C062S244000

Reexamination Certificate

active

06945071

ABSTRACT:
Fresh air exchange is achieved by uncovering two ports which, respectively, allow stale air to leave the trailer through a high pressure duct and fresh outside air to enter the trailer through a low pressure duct. The trailer end of the ducts are connected to the refrigeration unit evaporator section where the evaporator fan provides the pressure differential. The opposite ends of the ducts are connected to a bracket mounted on the refrigeration unit frame and are exposed to the outside fresh air through a hole in the refrigeration unit's grille when the cover over the ducts has been opened by the linear solenoid under the control of the microprocessor.

REFERENCES:
patent: 5265437 (1993-11-01), Saperstein et al.
patent: 5458188 (1995-10-01), Roehrich et al.
patent: 6694765 (2004-02-01), Waldschmidt et al.
patent: 6698212 (2004-03-01), Viegas et al.

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