Ventilation – Electronic cabinet
Patent
1995-09-22
1998-09-01
Joyce, Harold
Ventilation
Electronic cabinet
361695, H05K 720
Patent
active
058002588
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a ventilation system for cabinets with doors which are partly equipped with louvers in which electrical functional units are stacked, tower fashion, one above another, the functional units containing components which produce considerable heat, especially for data processing.
2. Description of the Prior Art
Particularly in data processing, functional units are frequently contained in a cabinet, the functional units having electrical components which produce considerable heat. The functional units are arranged in tower fashion one above another. For cooling and for discharging the air, fans are provided for the individual functional units, by means of which the hot air is frequently only blown out at the top of the cabinets. It is frequently also desirable, however, to discharge the hot air at another location.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a ventilation system which permits the hot air to be discharged from the cabinet in the horizontal direction at a location which is at the mid-height of the cabinet.
To achieve this object, the ventilation system according to the invention has four identical fan units arranged inside and at a middle (relative to its height) of a cabinet. The fan units are arranged in pairs with two fan units of each pair disposed one above the other and one rotated with respect to the other by 180.degree.. The two fan unit pairs are disposed next to each other. Each fan unit has a fan housing which is open at its two longitudinal sides and in which there is at least one axial-intake radial discharge fan (diagonal fan) which is arranged with its axis of rotation perpendicular to the bottom surface and top surface of the fan housing, that. In one pair, the two fan units lie directly one above the other, whereas fan units the two of the other pair are arranged a distance apart thus forming a horizontal air duct between them. The respective backs or fronts of the fan units are covered or blocked by structural elements of the cabinets.
Part of the cabinet door or of the rear wall can be used in this case as the blocking structural element, depending on the desired discharge opening for the hot air. In addition, cross-members or covers can also be provided in the interior of the cabinet for the blocking.
Since the two fan units in each pair are oriented with one fan unit rotated by 180.degree. relative to the other, the respective air intake directions of the two fan units in each pair are directed toward each other, and thus the fan units in a pair draw air away from the respective functional unit which they face. As a result of the aforementioned blocking, the fan units of the pair disposed directly above one another discharge air sideways into the duct formed between the fan units of the other pair, the duct conducting the discharged air out of the cabinet. Those spaced-apart fan units, in turn, as a result of the partitioning discharge air sideways out of the cabinet.
These measures make it possible for the air flow in the cabinet to be deflected from the vertical into the horizontal direction in a simple manner. As a result, the functional units can be ventilated in an optimum manner, and by this means it is also made possible for the hot air to be discharged at the back or front of the particular cabinet.
The direction in which the air is discharged is determined in a simple manner by varying the installation positions of the four fan units.
DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a cabinet with functional units assembled tower fashion and with the fans installed at mid-height, constructed in accordance with the principles of the present invention.
FIGS. 2a, 2b and 2c respectively show a fan unit constructed in accordance with the principles of the present invention in top, side and front views and FIG. 2d shows a side view of the other fan unit of that pair.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Electronic functional units 8 are arranged, as show
REFERENCES:
patent: 4674004 (1987-06-01), Smith et al.
patent: 4758925 (1988-07-01), Obata et al.
patent: 5136464 (1992-08-01), Ohmori
"Bis zu 600 m.sup.3 /H Luftdurschsatz mit Diagonalluftern," Markt & Technik, No. 9, Feb. 26, 1993, pp. 35 & 37.
Knoop Franz-Josef
Schmidt Heinrich
Joyce Harold
Siemens Nixdorf Informationssysteme Aktiengesellschaft
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