Air supply device

SWEDEN (19) SE (12) PUBLICATION WRITING IBld) 8306695-1 (5i) International class ⁴ F24F 13/068

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(44) Application published and publication published (41) Application widely available (22) Patent application filed (24) Lapday ATENTVERETET (62) Staman application number (86) International filing date (86) Filing date for European patent application (30) Priority information ( 11) Publication 86-05-26 number 445 069

85-06-06

83-12-05 . .

. Application received as.

8312-05 Swedish patent application □ Completed international patent application with number

Q converted European patent application with number

Ί) Applicant Anders Odelros, Jökelvägen 20 803 60 Gävle SE '2) Inventor Search

4) Representative Gävle patent office A8)

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Designation Supply air supply

Published publications SE 411

Summary

146 (F24F 13/02) US 4,316,406 (98-40R)

A supply air device comprises a housing (1) having a substantially flat apertured front layer (2) for releasing the air into a room, and means (3) for connecting the housing (1) to a supply air supply. Inside the housing (1) is formed a distribution chamber which is arranged to receive air from the supply duct and has a convexly curved wall (5) which is convexly curved to discharge the air in the direction of the front layer (2) in a divergent flow rates. The dimensions and the hollow shape of the substantially flat front layer (2) are selected to slightly modify the divergent character of the flow pattern.

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BACKGROUND OF THE INVENTION AND PRIOR ART

The present invention relates to a supply air device comprising a housing with a hollow substantially flat front layer for discharging the air into a room, means for connecting the housing to an air supply duct, and a distribution chamber formed inside the housing which is adapted to receive air from the supply duct, which distribution chamber has a convexly curved wall facing the flat front layer which is provided for discharge of air in the direction of the front layer in a divergent flow pattern.

Previously known supply air devices have been supplied with air directly from the supply air duct to the space behind the front layer. The air has then been supplied to the room through the front layer, whereby the air supplied to the room has spread in relation to the flat front layer, i.e. without any significant spread of the supplied air. In order to get a better spread, they have deviated from the flat front layer and instead designed it curved in different ways. The disadvantage of these later is that they cannot be built into walls and the like because the good spreading effect would then be lost.

Examples of a device which combines the curved hole-provided wall with a substantially flat front surface are, however, shown in the Swedish lay-out document 7613876-7, but this device does not intend to give a divergent flow pattern outside the front surface. Specifically, the curved apertured surface consists of a pipe which distributes the supplied air. The flow image just outside the tube periphery thus obtains a divergent character, but the flow image a bit from the tube periphery is

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8306695-1 is no longer divergent due to the fact that some of the divergent air streams are directed to the rear wall of the device and are reflected back so that the divergent flow is disturbed. Thus, this known device also does not give a satisfactory spreading effect to the air supply.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a supply air device which provides a good spread of the supplied air and which allows for installation in walls and the like with the front layer parallel and even with the wall surface.

According to the invention, this is achieved by having the curved aperture wall having edge portions which connect to a substantially flat rear wall of the housing, the distribution chamber being located between said posterior wall and the curving wall, so that the relationship between the depth of the curved apertured wall and the rectilinear distance between the the peripheral holes flowing through the outermost divergent air jets of the divergent flow is less than about 0.30; and that the substantially planar front layer dimensions and aperture are selected such that the front layer is flowed by the outermost divergent air jets of the divergent flow and that the divergent nature of the flow pattern is modestly modified.

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The present invention thus has the advantage that the divergent flow pattern obtained with a curved wall can be combined with the good potential of the flat front layer for integrated installation in walls and the like without deteriorating the air supply properties.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described in more detail with the aid of exemplary embodiments with reference to the drawings which show: Fig. 1 is a partially sectioned perspective view of the inventive supply air device.

Figure 2 is a horizontal section through the supply air device of Figure 1.

Fig. 3 is a sectional view taken along the line III-III in Fig. 2 illustrating a deflection member included in the supply air device.

Figures 4 and 5 show alternative embodiments of the curved wall illustrated in Figures 1 and 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Fig. 1 shows a supply air device comprising a housing 1 with a substantially flat front layer 2 for discharging the air into a room, and means 3 for connecting the housing 1 to an air supply duct (not shown). Inside the housing 1 is formed a distribution chamber 4, which is arranged to receive air from the supply duct and has a convexly curved wall 5 against the planar front layer, which is provided with holes 6 for discharging the air in the direction of the front layer 2 in a divergent. .ingsmönster. The essentially flat front layer 2 lim. tones and hole designs are selected to modestly alter the divergent nature of flow conditions.

The rear wall 7 of the casing 1 is substantially rectangular, flat and provided with collar edges 8a, 8b angled from this planar wall, which are interconnectable with the front layer 2 by suitable means. The curved hole wall

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8306695-1 is attached to and sealed against the rear wall 7 of the housing 1, so that the distribution chamber 4 is formed between said rear wall 7 and the curved wall 5.

In the embodiment shown, the curved wall 5 is formed by a number of parallel creases such that the curved wall approximately forms part of the casing surface of a cylinder. Of course, your part of a clean cylindrical casing surface can also be used. In addition to the attachment previously described, the curved wall is also attached to and sealed to the collar edges 8b of the housing 1 along the curved edges 9 of the curved wall 5. This is true in the embodiment shown, where the curved wall 5 approximately forms part of the cylinder surface of the cylinder. However, it is also possible to design the curved wall 5 as part of your sphere or approximate sphere, the sphere being attached to and sealed to only the rear wall 7.

In the holes 6 of the curved wall 5 there are provided deflection means 10 for deflecting it from the supply duct through one collar edge 8b, on which the connection socket 3 is arranged, the air supplied through the holes 6 is directed towards the front layer.

2nd The air flow flowing from the holes 6 exhibits a flow image corresponding to the shape of the curved wall 5, the flow image in the embodiment shown having a divergent flow shown in FIG. 2, while the flow image in the plane perpendicular to the above plane shows a parallel flow.

The ratio of the thickness of the front layer 2 to the diameter or equivalent diameter of a hole of the front layer is, to give minimal direction change to the flow image determined by the shape of the curved wall 5, less than about 1/3. By equivalent diameter is meant the diameter that a triangular, oblong or otherwise shaped hole with a given area would obtain if such a hole were formed circularly with the same area. The above-mentioned relationship is valid as long as the heel is approximately equal in the different directions of the frontal plane.

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Furthermore, the ratio of the depth t of the curved wall 5 to the rectilinear distance k between the peripheral holes 6 'flowing through the outermost divergent air jets of the divergent flow is less than about 0.30. In addition, the ratio of the latter distance k to the rectangular distance 1, measured in the same direction as the distance k, is from the peripheral holes at one edge 11 of the flat front layer 2 across to the peripheral holes at the opposite edge of the flat front layer, less than about 0.80.

The flat apertured front layer 2, when projecting towards the curved wall 5, to give minimal directional change to the flow image determined by the curved wall 5, has a substantially equal open area over the entire flat front layer 2 to be flowed through the air supply. air.

One way to achieve the above-mentioned equal area is to design the apertured front layer 2 with an open area which, when projecting against a flat parallel support, increases in direction towards the edges 11 of the front layer 2 which are intended to flow through the outermost of the divergent flow. divergent air jets. The open area is varied by the hole distribution and / or the hole size.

Another way to achieve the above-mentioned Equal Area is to arrange the flat, layer holes in such a way that their alignment throughout the front layer substantially forms a normal to the curved wall, i.e., the alignment of the holes will vary across the front layer.

It should be noted that the possibilities of obtaining a front layer that modifies the divergent rate to a small extent ·&gt;: n of the flow pattern are many and we have here one-Zf proven example of this and we have some parameters that are

r. ' BEF. of targets. These can thus be combined in a number of ways, with a view to the law, above all, economy and supply, now, hospitality aspects. However, some parameters have some practical dimension limits, such as the height h of the collar edges and the width of the housing 1 which are approximately the same as j spacers 1, where these measurement limits are given by the thickness of the wall and the distance between the rules in wall &lt;-n.

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Finally, to further elucidate the various possibilities of obtaining a front layer 2 which modifies to a minor extent the divergent character of the flow pattern from the curved wall 5, Here is given another example, which is based on forming the holes in the front layer 2 into slits extending completely or partially across the front layer 2 in the direction from the outermost divergent air jets at one edge 11 of the frontal layer 2 and against the outermost divergent air jets at it. the second edge 11 of the front layer 2. Thus, in the shown embodiment with cylindrical surface-like curvature, the slots formed of suitable length would be parallel, while in an embodiment with sphere-like curvature, they would stand in a certain angular relationship to each other, ie, radiate out from the center of the sphere.

The deflection member 10 shown in Fig. 3, after deflection, also provides a very good directional action of the air jets. This directional effect can also be achieved in other ways, for example by means of the device shown in Fig. 4, which is designed with a relatively large thickness in relation to the hollow area. The material between the holes is, for example, by weight point of view preferably of any suitable composite material. This device is intended to be used in place of the wall 5 shown in Figures 1 and 2 with associated deflection means 10.

A further way of effecting this directional action is to use, as shown in Fig. 5, a plate with extruded holes, in which the extruded material is stretched so that the hole depth c clearly exceeds the plate thickness and so that the hole depth. becomes relatively large in relation to the hollow area. The thickness of the hole walls 12 decreases in the direction away from the portions 13 between the holes. This device is also intended to replace the wall 5 shown in Figures 1 and 2 with associated deflection means 10.

Of course, the invention is not limited to the embodiments described above, but many modifications are possible without departing from the basic idea of ​​the invention.

·!?: · ·, Ι^; vats. connection space 3, if space exists, is arranged in the rear wall 7, thereby obtaining a more even distribution of air to the holes 6. Furthermore, the collar edges 8 need not form a right angle with the rear wall 7, but instead they could converge towards a point located behind the rear wall 7.

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