FI74534B - Air supply device. - Google Patents

Description

1 74534

Supply Unit

BACKGROUND AND PRIOR ART The present invention relates to a ventilation device comprising a housing with perforated substantially planar front layers for admitting air into a room and means for connecting the housing to an air supply duct, and a distribution chamber formed inside the housing and adapted to receive air from the supply duct. towards a convex-curved wall provided with holes for the passage of air 10 towards the front layer and in a dispersed flow pattern.

With previous ventilation devices of this type, air has been led immediately from the air duct to the space behind the front floor. The air is then introduced into the room through the front layer, whereby the air introduced into the room is distributed planarly with respect to the front layer, i.e. without any substantial dispersion of the introduced air. Then, in order to obtain a better dispersion, the planar front layer is omitted and instead it is bent in different ways. The disadvantage of these latter devices is that they cannot be installed inside the walls and therefore the good dispersing effect is lost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ventilation device which allows good dispersion of the introduced air and which allows wall mounting and a device in which the front layer is: Y: 25 parallel and flush with the wall surface.

··· This is achieved according to the invention in that a bent, perforated wall has edge portions associated with a substantially planar rear wall of the housing, the distribution chamber being located between said rear wall and the bent wall, that ratio being bent, the linear distance between the depth of the perforated wall and the outer holes through which the outermost dispersed air jets of the dispersed flow flow is less than about 0.30, and that the dimensions of the substantially planar front layer and the shape of the holes are selected so that the outermost dispersed flow disperses the air jets flow through the front layer, and that the dispersing nature of the flow pattern changes in a small amount.

Thus, the advantage of the present invention is that the dispersed flow pattern obtained by the curved wall 74534 can be combined with the good possibilities of uniformly installing a planar front layer on walls and the like without deteriorating the import properties.

5 Brief description of the drawings

The invention will now be explained in more detail by means of some application examples, with reference to the accompanying drawings, in which Fig. 1 shows a partially sectioned perspective view of a ventilation device according to the invention, Fig. 2 shows a horizontal section of the ventilation device according to Fig. 1; moon-15 permits deflection member, Figures 4 and 5 show alternative designs of the curved wall illustrated in Figures 1 and 2.

DETAILED DESCRIPTION OF SOME PREFERRED EMBODIMENTS Figure 1 shows a ventilation device comprising a housing 1 with a substantially planar front layer 2. to the room and a means 3 for connecting the housing 1 to the air intake duct (not shown). Inside the housing 1 a distribution chamber 4 is formed, which is adapted to receive air from the inlet duct and has a planar -: · a convexly curved wall 5 »facing the front layer 2, provided with holes 6 for discharging air towards the front layer 2 flow pattern. The dimensions of the substantially planar front layer 2 and the design of the holes have been chosen in small amounts to change the dispersive nature of the flow pattern.

The rear wall 7 of the housing 1 is substantially rectangular, planar and provided with this planar wall: angled bending edges 11a 8a, 8b which are connectable to the front layer 2 by suitable means. The convex perforated wall 5 is fixed to the rear wall 7 of the housing 1 and sealed against it so that a dispensing chimney 4 is formed on said rear wall 7 and

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74534 3 Between Reva wall 5.

In the embodiment shown, the curved wall 5 is formed of a plurality of parallel pleats, so that the bent wall forms part of the cylindrical shell surface 5. Of course, a part of a genuine cylindrical jacket surface can also be used. In addition to the fastening previously described, the curved wall is fixed and sealed to the bending edges 8b of the housing 1 and sealed against them along the curved edges 9 of the curved wall 5. This applies to the embodiment shown 10, in which the curved wall 5 forms part of an approximately cylindrical shell surface. However, it is also possible to form the curved wall 5 as a part of the ball or approximately the ball, whereby the ball is fixed to the rear wall 7 and sealed only against it.

Deflection means 10 are arranged in the holes 6 of the curved wall 5 from the supply duct through the second bending edge 8b to which the connection socket 3 is fitted, for deflecting the air supplied through the holes 6 towards the front layer 2. The air flow flowing from the holes 6 has a curved wall 5; 20 is a flow diagram corresponding to 20 forms, wherein in the embodiment shown, this flow diagram shows a planarly distributed flow shown in Fig. 2, while the flow diagram in the plane i perpendicular to the above-mentioned plane is a parallel flow.

; ·; 25 The ratio between the thickness of the front layer 2 and the dimension or equivalent diameter of the hole of the front layer 2 is, to give a minimum change in direction to a flow pattern determined by the shape of the curved wall 5 less than about 1/3 · Equivalent diameter means a diameter which * *: 30 is a triangular, elongated or otherwise formed hole with certain areas that would be obtained if such a hole were formed round in the same area.

.M The above relationship is valid as long as the holes are; approximately equal dimension in different directions of the front layer level.

Further, the ratio between the depth t of the curved wall 5 and the linear distance k between the outermost holes 6 'through which the outermost air jets of the diffuse flow il 74534 flow is less than about 0.30. In addition, the ratio between the latter distance and the rectilinear distance 1 ', measured in the same direction as the distance k, from the outermost holes at the other edge of the planar front layer 5 to the outermost holes at the opposite edge of the planar front layer is less than about 0.80.

The planar torn front layer 2, when projected on the curved wall 5 to provide a minimal change of direction to the metaphor determined by the curved wall 5, has a substantially equal open area throughout the planar front layer 2 through which air enters the ventilator.

One way to achieve the above-mentioned uniform area is to provide a perforated front layer 2 with an open area which, when projected on a planar parallel substrate, grows towards the edges of the front layer 2 through which the outermost dispersed air jets 20 can flow. This open area is changed by dividing the holes · .: and / or their size.

A: Another way to obtain the above-mentioned equal area is to fit the holes of the planar layer in such a way that their orientation throughout the front layer forms a curved wall normal, i.e. the orientation of the holes will vary over the front layer.

It should be noted that the possibilities for providing a front layer that slightly alters the dispersive nature of the flow pattern are many, and only some examples and parameters are provided herein that are relevant. They can thus be combined in a number of ways, including However, some of the parameters have certain practical measuring limits, such as, for example, the height h of the bends and the width of the housing 1, etc. ;, is • · approximately the same as the distance 1 '# when the wall thickness and the distance between the locks on the walls have given these measurements.

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74534 raj at.

Finally, in order to further illustrate the different possibilities for providing the front layer 2, which slightly changes the diffuse nature of the flow pattern 5 from the curved wall 5> here is a further example based on forming the holes of the front layer 2 into slots extending completely or partially across the front layer 2. 2 of the outermost dispersed air jets 10 at one end towards the outermost dispersed air jets at the other edge 11 of the front layer 2. In the embodiment shown, which has a curvature similar to the surface of a cylinder, the slits made of suitable length are parallel, while in one embodiment where the wall 15 has a spherical curvature, the slits are at a certain angular relationship to each other, i.e. spray from the center of the ball.

The deflection member 10 shown in Fig. 3 also provides a very good directional effect of the air jets after the deflection. This directing effect can also be achieved in another way, for example by the device shown in Fig. 2, which has a relatively large thickness with respect to the hole area. The material between the holes is, among other things, preferably a suitable mixed material from a weight point of view.

This device is intended to be used instead of the wall 5 shown in Figures 1 and 2: V: 25 with its associated deflection means 10.

A further way to achieve this directing effect, as shown in Fig. 5, is to use the plate with extruded holes, whereby the extruded material stretches out, so that the depth c of the hole clearly exceeds the thickness of the plate and the depth of the hole becomes relatively large with respect to the hole area. The thickness of the walls 12 of the hole decreases away from the parts 13 between the holes: ”. This device can also replace the wall 5 shown in Figures 1 and 2 with its associated: V: 35 deflection members 10.

It is self-evident that the invention is not limited only to the embodiments described above, but that many modifications are possible without departing from the basic idea of the invention. For example, the connecting member 3 »if there is space, is fitted to the rear wall 7, which provides a more even distribution of air in the holes 6. Furthermore, it is not necessary to form the fold edges 8 at right angles to the rear wall 7, but instead send them towards a point behind the rear wall 7.

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Claims (10)

A supply air device comprising a housing (1) having a heel-provided substantially flat front layer (2) for releasing the air into a room, means for connecting the housing (1) to an air supply duct, and an interior formed (1) distribution chamber (4) arranged to receive air from the supply duct, said distribution chamber (4) having a convex curved wall (5) facing the flat front layer (5) which is provided for release of air towards the front layer (2) in a divergent flow pattern, characterized in that the curved heeled wall (5) has edge portions which connect to a substantially posterior wall (7) in the housing, the distribution chamber (4) being located between said rear wall (7) and the curved wall (5). 5) that the ratio between the depth (t) of the curved heeled wall (5) and the rectilinear distance (k) between the peripheral heels (6 ') flowing through the outermost divergent air jets of the divergent flow is less than about 0.30; and that it The substantially planar front layer (2) dimensions and heel shape are selected such that the front layer (2) is permeated by the extreme divergent flow of the divergent flow::: air jets and the divergent nature of the flow pattern is modestly modified. 2. Supply air device according to claim 1 or 2, characterized in that the curvature of the curved heeled wall (5) is formed by a number of folds. • V 3. Supply air device according to any preceding claim, characterized in that the heel (6) in the curved heel-provided wall (5) is provided with deflection means (10) for deflection of air flowing inside the distribution chamber (4). this through the heel (6). 10 74534 4. A supply air device according to the preceding claim, wherein the ratio between the thickness of the heeled front layer (2) and the diameter or equivalent diameter of a shark is less than 1/3. 5. Supply air device according to some previous claim, characterized in that the flat heeled front layer (2), when projecting towards the curved heeled wall (5), has a substantially equal open area over the entire flat front layer (2). ) which is supposed to be flowing through air. 6. Supply air device according to some previous claim, characterized in that the open area of the well-fronted front layer (2), when projecting towards a flat parallel support, increases in the direction towards the edges (11) of the front layer (2). ) which are intended to flow through the outermost divergent air jets of the divergent flow. 7. Supply air device according to some previous claim, characterized in that the heel of the flat front layer (2) is made up of heels, whose alignment everywhere on the front layer (2) essentially forms a normal to the curved wall (5). 8. Supply air device according to some previous claim, characterized in that the heel of the front layer (2) consists of slits extending across the front layer (2) in. **: direction from the outermost divergent air jets at «one edge of the front layer (2). ), and against the outermost divergent air jets at the other edge (11) of the front ·: - layer (2). - · · 9. Supply air device according to any preceding claim, characterized in that the ratio between the rectangular distance (k) and that, measured in the same direction as the distance (k), the rectangular distance (1 ') from the peripheral heels at one edge (11) of the flat front layer (2) across to the peripheral heel at the opposing edge (11) of the flat front layer (2) is less than about 0.80. • · · * 10. Supply air device according to some previous claim, characterized in that the convex curvature wall (5) * ·; is sf is 1 ninth. Il