Electronic cabinet door air mixing dam

Details Electronic cabinet door air mixing dam Electronic cabinet door air mixing dam

1999-06-30

2001-02-13

Joyce, Harold (Department: 3749)

Ventilation

Electronic cabinet

C361S695000

Reexamination Certificate

active

06186890

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates generally to electrical cabinets and more particularly to cooling systems used to cool electrical components housed in such cabinets.
As is known in the art, air is typically used to cool electrical components stored within electrical cabinets. One technique for such cooling is to mount a fan in an aperture in the top of such cabinets. Such a fan creates an air flow through the cabinet, cooling the housed electrical components.
Typically, a flat door is used to seal the components within the cabinet. One type of door enables the fan to draw in air from a gap at the bottom of the door allows air to enter the gap and pass directly between the door and the electronic components stored in said cabinet.
SUMMARY OR THE INVENTION
In accordance with the present invention, a cabinet is provided having a plurality of compartments disposed in an interior of the cabinet. The interior is configured to house electrical components. The cabinet has a surface with an exhaust aperture formed therethrough. The cabinet has a fan mounted to the surface in registration with the exhaust aperture in the cabinet. The fan is adapted to produce a flow of air through the interior of the cabinet and to exhaust such flow of air externally of the cabinet. A door is disposed adjacent to the plurality of compartments. The door has an aperture formed therethrough to allow passage of the flow of air. The door also has an air dam extending from the door toward the plurality of compartments. The air dam is positioned on the door between the aperture in the door and the fan. The air dam is adapted to inhibit the flow of air along the interior door and redirect the flow of air through the plurality of compartments housing the electrical components.
Absent the dam, a low impedance path along the door creates a chimney effect diverting the fan produced airflow away from the components which the air was meant to cool. Such a loss in airflow over the components decreases efficiency in cooling the components, causing them to heat up with use. As a result, the higher temperatures at which these components operate leads to accelerated component failure. With the dam, the flow of air is redirected through the plurality of compartments housing the electrical components.


REFERENCES:
patent: 5544012 (1996-08-01), Koike
patent: 6052282 (2000-04-01), Sugiyama et al.
patent: 2-65608 (1990-03-01), None
patent: 4-209598 (1992-07-01), None

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