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US 5,961,702 AGranted
Air replenishment unit
AssigneeGebhardt Ventilatoren GmbH & Co.
InventorWolfgang Doneit
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AssigneeGebhardt Ventilatoren GmbH & Co.
InventorWolfgang Doneit
Estimating the term…
An air replenishment unit more particularly for suspension under ceilings of clean rooms, including a housing whose wall is provided with a fan on the intake side, an outlet opening of the housing being functionally connected with an air filter arrangement. The strip-like housing having the fan is bent on the intake side at two opposite sides in an arcuate manner toward the output side, the two longitudinal edges of such wall being joined to two side walls, which are essentially parallel to each other, by folded sheet joints. The free edges, not having any folded joints, of the strip-like wall and the side walls essentially define an outlet opening. Such a housing together with a fan may be produced simply, economically and with a light weight using only three pre-stamped parts using folded or crimped seams and then constitutes a single-piece downwardly open hood-like housing with high class flow properties.
An air replenishment unit for suspension under ceilings of clean rooms, comprising a housing having a strip shaped wall provided with a fan on the intake side, an outlet opening of the housing being functionally connected with an air filter arrangement, wherein the strip shaped wall having the fan is bent on the intake side at two opposite sides in an arcuate manner toward the output side, two longitudinal edges of the strip shaped wall being respectively joined to two parallel sides walls of the housing by means of folded joints and free edges of the strip shaped wall and the side walls essentially defining the outlet opening of the housing.
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening: arrangement or mounting of filters
By purification, e.g. by filtering; by sterilisation; by ozonisation: clean rooms, i.e. enclosed spaces in which a uniform flow of filtered air is…
Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening: means for preventing or…
Details or features not otherwise provided for: mounted on the ceiling
Term ended 17 Feb 2018 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Technical Field of the Invention
The invention relates to an air replenishment unit more particularly for suspension under ceilings of clean rooms, comprising a housing whose wall is provided with a fan on the intake side, an outlet opening of the housing being functionally connected with an air filter arrangement.
2. The Prior Art
Further advantageous developments and convenient forms of the invention will be understood from the following detailed descriptive disclosure of embodiments thereof in conjunction with the accompanying drawings.
FIG. 1 shows a longitudinal sectional view of an air replenishment unit borne by a ceiling rail arrangement in a clean room as a first embodiment of the invention.
FIG. 2 is a cross sectional view of the same air replenishment unit.
In the case of the embodiment depicted in FIGS. 1 and 2 a housing 10 comprises two vertical and mutually parallel side walls 11 and 12 and an upper strip-like peripheral wall 13. The side walls 11 and 12 possess an essentially semi-elliptical form, the longitudinal side edges extending essentially in parallelism in the central region and the top longitudinal side edge extending at the two end region arcuately toward the bottom longitudinal side edge. The two parallel longitudinal side edges of the strip-like peripheral wall 13 are connected in a sealing manner with the top longitudinal side edges, which are in part arcuate, of the two side walls 11 and 12 by means of a folded or crimped seams 14 and 15, such seams being in the present case in the form of turned-out or elbow seams. This means that a single-piece hood-like housing 10 is formed, which is open in a downward direction, the bottom longitudinal side edges of the side walls 11 and 12 and the two transverse walls of the peripheral wall 13 defining a bottom outlet opening. The top peripheral wall 13 is curved to correspond to the configuration of the side walls 11 and 12. The outlet opening may in this respect--as is illustrated--assume the form of an elongated rectangle, although it may also however be in the form of a square.
The side walls 11 and 12 and the peripheral wall 13 may for example consist of galvanized and/or powder-coated or stainless steel sheet or of aluminum sheet.
Generally in the middle the top peripheral wall 13 a fan 16 is provided in the form of a radial fan. Such fan draws in air from above and blows it through the housing and laterally and radially out again, as is indicated by arrows in FIG. 1. The air current follows the curvature of the peripheral wall 13. The fan 16 is inserted downward into the opening as a pre-assembled, adjusted and calibrated fan module and fixed in place on the peripheral wall 13. It is more especially in a case in which the fan 16 is, and unlike the case of FIG. 1, does not possess any module housing of its own. For attachment of the fan 16 it is also possible to employ a holding frame, as is for example illustrated and described in the said European patent publication 0 735 329 A.