1983-05-27
1985-08-27
Yuen, Henry C.
981211, F24F 1306
Patent
active
045371180
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a flow distributor of the kind comprising a perforated defining wall of a duct or chamber having at least one further defining wall, said duct or chamber being arranged to receive a main flow or medium and exhibiting adjacent said perforations deflecting means which project inwardly into the path of the main flow of said fluid and which divide said flow into a plurality of part flows which exit to the other side wall through said perforations transversally of said main flow, said perforated defining wall comprising a profiled plate having profile sections or wall sections which extend transversally of the direction of the main flow.
STATE OF THE ART
A flow distributor in the form of a pipe or tube is described in U.S. Pat. No. 4,170,930 (Lind). The perforations may optionally house a plurality of nozzles which project into the path of the main flow and divide said flow into a corresponding number of uniformly distributed part flows of mutually equal magnitude. The nozzles are suitably formed so that the flow rate of the part flows corresponds substantially to the flow rate of the main flow upstream of the first nozzle.
Another flow distributor is described in German Open-to-public print 29 41 276 (Lind). This distributor comprises a planar wall provided with inwardly projecting lips or nozzles.
German Lay-out print 1,124,658 (Krantz) describes a perforated air-duct comprising obliquely directed wall portions in the region of the holes or perforations for the exit of air. The object of said sloping wall portions is to compensate for the oblique component of the air's flow velocity. Thus, there are no deflecting means of the kind here under concern which project into the path of the main flow. Separate wall portions which are present and which extend transversally of the main flow are namely not intended to serve such a purpose and, further, cannot do so as they are positioned too far away from the holes or perforations.
German Open-to-public print 1,759,782 (Gebr. Sulzer) describes a roof having openings for the exit of air. The exit openings are provided in an airtight flexible membrane which may have a corrugated shape. No separate deflecting means are present.
OBJECT OF INVENTION
One object of the present invention is to provide a multi-purpose flow distributor which is simpler and more efficient than known flow distributors.
BRIEF DISCLOSURE OF THE INVENTION
In its widest aspect, a flow distributor according to the invention is mainly characterized in that the profile sections extending transversally of the direction of the main flow are positioned immediately downstreams of one or more perforations and form its or their deflection means.
A flow distributor comprising a profiled plate in accordance with the invention can be produced much more cheaply than, for example, a tubular flow distributor, and enables, for example, a flow of medium to be effectively distributed and deflected in a given direction over a wide area, which is often desirable of such distributors or is a requirement thereof.
The flow distributor according to the invention can be used, for example, to distribute a main flow of medium across a surface for ventilation purposes, for example. The flow distributor can also be used in hot-air ovens and rapid-cooling apparatus where hot or cold air is to be uniformly distributed over products to be heated or cooled. Other fields where the flow distributor according to the invention can be used include drying plants and fluidized beds.
There is no limitation with regard to the dimensions of the perforations or apertures. Small apertures (some few millimeters in size) can be used when a laminar flow is desired, while large apertures can be used when a strong turbulence is required, as with drying plants or furnaces.
By giving the profile sections and the exit apertures a suitable shape and size, it is possible to obtain the same pressure in all said exit apertures, while the profile sections extending transversally of the direction of t
REFERENCES:
patent: 173722 (1876-02-01), Hayes
patent: 173786 (1876-02-01), Hayes
patent: 1520142 (1924-12-01), Roth
patent: 4170930 (1979-10-01), Lind
patent: 4316406 (1982-02-01), Lind
Kwon John
Yuen Henry C.
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