Refrigeration – Structural installation
Patent
1998-09-03
2000-07-25
Bennett, Henry
Refrigeration
Structural installation
62248, F25D 2312
Patent
active
060923849
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The invention relates in general to a cooling device that can be placed on a covering wall of a control box, and more specifically to a cooling device that can be connected to a control box by means of an inlet opening.
BACKGROUND OF THE INVENTION
A control box that is surrounded on all sides by a shell is specified in DE295 19 260 U1. Such a cooling device which can be placed on the cover wall of the control box includes a roof element that, while connected to the upper side of the cooling device, projects beyond the cooling device housing on all sides.
As a rule, cooling devices such as the one disclosed in DE 37 10 566 C2, have an air inlet in the side wall for fresh air, and an air outlet for warmed exhaust air. The air inlet and air outlet are then covered by means of a ventilation screen. While such a ventilation screen is useful in preventing moisture and dirt particles from entering the air inlet once the cooling device is in operation, it offers no guarantee that moisture and dirt particles will not penetrate into the control box through the air conditioner while the control box and air conditioner are being set up in the field.
OBJECT OF THE INVENTION
An object of the invention is to provide a cooling device that overcomes some of the problems and shortcomings of the prior art.
Another object of the invention is to provide a cooling device that improves the protection afforded the cooling device and the control box with regard to moisture, in particular rain or the like, and particles of dirt. How these and other objects are accomplished will become apparent from the following descriptions and from the drawings.
SUMMARY OF THE INVENTION
This invention involves a cooling device that is connected to a cover wall of a control box by an inlet opening in such a manner that the housing of the upper side of the cooling device that faces away from the control box is provided with both an air inlet and an air outlet. A roof element covers the upper side of the cooling device. Said roof element, which is separated by a space from the cooling device housing, projects beyond the cooling device housing on all sides thereby forming a circumscribing ventilation slot that is open in a downward direction. At least two chambers, which are connected to both the air inlet and outlet, are formed in the roof element by means of separating sheet metal.
In one embodiment of the invention, the lateral walls of the cooling device housing can be closed completely. In such an embodiment, rain and the like drips off over the edge of the roof element. Also, the air inlet and the air outlet are covered by the roof element thus, protecting them from various forms of precipitation as well as dirt particles. Greater protection from the elements can also be provided by covering at least the air inlet with a ventilation screen.
In yet another embodiment, protection from rain is improved in that the roof element is provided with a circumscribing downwardly-inclined edge that overlaps at least one of the lateral walls of the cooling device. Rain runoff is thereby simplified by having the roof element feature a horizontally oriented cover plate that transitions into the edge by means of inclined transition sections that drop off. Furthermore, the corners of the roof element are beveled in the area of the roof edge and the transition sections.
In still another embodiment, the design of the cooling device is adapted to the cross sectional shape of the control box and is characterized by the fact that the cooling device housing is rectangular in cross section with a substantially centered separating wall that is oriented parallel to the narrow sides of the cooling device housing. In such an embodiment, the air inlet and outlet chambers are positioned one behind the other in the direction of the longitudinal sides of the cooling device housing.
In a preferred embodiment of the invention, the formation of the ventilation slot and the air inlet and outlet chambers in the area of the roof element results from the
REFERENCES:
patent: 4043143 (1977-08-01), Fluder et al.
patent: 4609126 (1986-09-01), Janda
patent: 4641502 (1987-02-01), Aldrich et al.
patent: 4905478 (1990-03-01), Matsuda et al.
patent: 5029452 (1991-07-01), Mourabet et al.
patent: 5184474 (1993-02-01), Ferdows
Diebel Michael
Edelmann Achim
Kuster Frank
Bennett Henry
Jones Melvin
Rittal--Werk Rudolf Loh GmbH & Co. KG
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