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AssigneeSiemens VDO Automotive Corporation
InventorsHerve Champeau, Olivier Forgerit
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This system is for ventilating a housing or a housing portion that has to house a contents (39) and has ventilation grids (33, 35) for said contents, said grids being formed from segments of material leaving a gap between them, characterized in that these segments of material are arranged at at least two levels (9a, 9b) offset depthwise in the general direction of entry of a gaseous fluid into the housing or the housing portion through the grid in question, in order to constitute, by grid, a multiple-grid system, the grids being offset depthwise with respect to one another.
A ventilation system on a housing or a housing portion that has to house a contents (39) and has ventilation grids (3;
The system as claimed in any one of the preceding claims, characterized in that, at the various levels, the segments of material (5a, 5b, 5c) forming the multiple-grid system consist of bars approximately parallel to one another.
The system as claimed in any one of the preceding claims, characterized in that it includes ribbing (13) extending transversely beneath the last level (9b) with respect to the direction of flow (11) of the ventilating fluid entering the housing.
A portion of a housing comprising a ventilation system as claimed in any one of the preceding claims, preferably with a distance between two adjacent segments of material (5a 5b) of less than about 1 mm, for an anti-intrusion effect.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Details: venting apertures; Constructional details thereof
Venting apertures; Constructional details thereof: with means preventing penetration of rain water or dust
Printed circuits
Term end not estimated
The invention relates to the ventilation of a housing, in particular a housing that may contain electronic components, in a land vehicle such as a car, under the engine hood (bonnet).
Ventilation systems formed on a housing or a housing portion that has to house a contents, and has ventilation grids for said contents that are formed from segments of material leaving a gap between them, are already known.
However, it transpires that, in particular when the housing has to contain members that heat up (such as the aforementioned electronic components) or more generally when it is desired to obtain a flow of air (gaseous fluid) in accordance with the expected ventilation of the contents of the housing (for example 0.2 m/s, without recourse to forced air), a conventional ventilation grid proved to be inappropriate.
Another more detailed description of the invention will now be provided in conjunction with the appended drawings in which:
FIGS. 1 to 3 show schematically, on different scales, the improved ventilation system of the invention on a housing wall;
FIG. 4 shows schematically two vertically offset segments of material;
FIG. 1 shows a wall 1 of a plastic housing comprising a ventilation system 3 according to the invention.
The wall 1 may consist of a wall part of one-piece housing or of a portion of a housing consisting of several portions that can be joined together to form a closed, complete housing.
In the present case, the ventilation system 3 is integral with the wall 1. It was manufactured by molding, at the same time as this wall. The material of which it is made is a rigid plastic.