GB2338546A

GB2338546A - A ceiling air outlet

Info

Publication number: GB2338546A
Application number: GB9908577A
Authority: GB
Inventors: Juergen F Eidmann; Reimund Jaeger
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-17
Filing date: 1999-04-16
Publication date: 1999-12-22
Anticipated expiration: 2019-04-16
Also published as: GB9908577D0; DE19827012C1; FR2780141A1; GB2338546B; FR2780141B1; CH693185A5

Abstract

An air outlet comprising an air conduction nozzle (1) and a hub (2), and comprising guide vanes (4) disposed at a predetermined pitch angle. The nozzle wall (3) has assembly recesses (5a) for the guide vanes (4) which are disposed corresponding to the respective pitch angle of the guide vanes (4). The same applies to the hub (2), wherein the guide vanes (4) also fit into the assembly recesses (5a, 5b) by means of assembly studs (8a, 8b) on their outside and inside, and can be fixed in the air conduction nozzle (1) with different directions of swirl by pressing the hub upper part (6) and the hub lower part (7) together.

Description

1 An air outlet, particularly a ceiling air outlet 2338546 This invention

relates to an air outlet, particularly a ceiling air outlet, comprising an air conduction nozzle having a central hub and having guide vanes for swirl generation which are disposed at a predetermined pitch angle in the air conduction nozzle between the nozzle wall and the hub.

Air outlets of this type are known in which the nozzle wall and the hub have assembly slots for the insertion of the guide vanes. The guide vanes are welded or adhesively bonded in these assembly slots. This is a costly assembly technique. One particular disadvantage is that with forms of construction such as this it is only one defined direction of swirl either clockwise or anti-clockwise -which can be effected. This is because the respective direction of swirl is predetermined by the course of the assembly slots. This disadvantage is also exhibited by those air outlets which are produced as one-piece components by an injection moulding or die casting route and which consist of plastics or of aluminium. The present invention aims to provide a remedy here.

A basic object of the present invention is to create an air outlet, particularly a ceiling air outlet, of the form of construction described at the outset, in which opposite directions of swirl can be achieved according to choice and in a simple and efficient manner, using identical components in the course of fabrication.

According to the present invention, there is provided an air outlet, particularly a ceiling air outlet, comprising an air conduction nozzle having a central hub and having guide vanes for swirl generation which are disposed at a predetermined pitch angle in the air conduction nozzle between the nozzle wall and the hub, wherein the nozzle wall comprises assembly recesses for the guide vanes, which assembly recesses are disposed corresponding to the respective pitch angle of the guide vanes, that the hub comprises a hub upper part and a hub lower part and 2 comprises assembly recesses for the guide vanes which assembly recesses are disposed between the hub upper part and the hub lower part, that the guide vanes have assembly studs on their outside and inside for fitting into the assembly recesses, and that the guide vanes are fixed in the air conduction nozzle with a direction of swirl which is either clockwise or anticlockwise by pressing the hub upper part and the hub lower part together.

The invention stems from the recognition that the guide vanes can be inserted between the nozzle wall and the hub corresponding to two opposite directions of swirl. This is achieved due to the arrangement firstly of the assembly recesses in the nozzle wall, and secondly of the assembly recesses between the hub upper part and the hub lower part, taking into account the fact that the guide vanes have corresponding assembly studs. Consequently, two different pitch angles can be produced in the course of installing the guide vanes, because the alignment of the guide vanes is no longer predetermined by assembly slots, firstly in the nozzle wall and secondly in the hub. Within the scope of the invention, the creation of two opposite directions of swirl is achieved with the use of identical components, because the air conduction nozzle, the guide vanes and the hub comprising the hub upper part and the hub lower part which are required in this respect are always of unchanged design. At the same time, the air conduction nozzle can comprise the flange on the air outlet side which is customary for an air outlet. The fact that it is always only the same components which are required for the air outlet according to the invention, even for opposite directions of swirl, inevitably results in a simplified and efficient mode of fabrication for the air outlet according to the invention.

Other features which are essential to the invention are listed below. Thus the invention provides for the nozzle wall to have an upper ring and a lower ring with assembly recesses disposed over the nozzle periphery in a predetermined distribution (the assembly recesses are therefore disposed in rings, as it were), and for the guide vanes each to have two assembly studs 3 on their outside, the spacing of which corresponds to the diagonal spacing of adjacent assembly recesses in the upper ring and lower ring, so that the assembly studs can therefore be inserted or suspended in the assembly recesses with changeable diagonals and consequently with changeable angles of pitch and with opposite directions of swirl of the guide vanes which result therefrom, because the assembly recesses, at least in the nozzle wall, are preferably formed as holes. The assembly recesses of the upper ring are advantageously aligned axially with the assembly recesses of the lower ring, and are each disposed at the same spacing, both axially and radially. The invention flu-ther provides for the guide vanes to have only one assembly stud on their inside, e.g. a centrally disposed assembly stud, which in the course of fabrication permits a swivelling movement of the guide vanes into one or the other directions of swirl corresponding to one or the other angles of pitch. To achieve a perfect fit between the guide vanes and the nozzle wall on the one hand and between the guide vanes and the hub on the other hand, the guide vanes advantageously have an arcuate shape on their outside and inside which is matched to the internal radius of the nozzle wall and to the external radius of the hub, respectively, and which corresponds to a theoretical line of intersection between the slanting guide vanes and the nozzle wall on the one hand and between the slanting guide vanes and the hub on the other hand.

According to one proposal of the invention which is important in its own right, provision is made for a toothed disc, which can be turned over, to be inserted between the hub upper part and the hub lower part, wherein the tooth gaps of the toothed disc form the assembly recesses on the hub side. In this respect, the tooth gaps can be formed as gaps which are slanted clockwise and which after turning over the toothed disc are slanted anti-clockwise. In this manner, a form of construction which is particularly simple as regards the fabrication technology employed is put into effect for producing the assembly recesses in the region of the hub so as to be able to insert and fix the guide vanes with opposite directions of swirl. The invention further provides 4 for the hub upper part, the toothed disc and the hub lower part to be threaded on a tubular rivet and for them to be riveted to each other at assembly studs of the guide vanes which fit into the tooth gaps. During the riveting operation, the hub upper part, the toothed disc and the hub lower part are therefore compressed with each other, as it were, which results in a central anchoring point for the guide vanes which are inserted in the nozzle wall or in the assembly recesses or holes thereof.

A mode of assembly of the guide vanes is thus achieved which is particularly simple and efficient as regards the fabrication technology employed.

The invention is explained in greater detail below with reference to the drawings, which merely illustrate an example of an embodiment, and where:

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 is a plan view of an air outlet according to the invention; shows the subject of Figure 1 with an opposite direction of swirl; is a side view of the air outlet according to the invention; shows a guide vane for the subject of Figure 1; and is an exploded view of the hub comprising the hub upper part, the toothed disc, the hub lower part and the tubular rivet.

The Figures illustrate an air outlet, particularly a ceiling air outlet, the basic construction of which comprises an air conduction nozzle 1 having a central hub 2 and having guide vanes 4 for swirl generation which are disposed radially/axially and at a predetermined pitch angle in the air conduction nozzle 1 between the nozzle wall 3 and the hub 2. The nozzle wall 3 comprises assembly recesses 5a for the guide vanes 4, which assembly recesses are disposed corresponding to the respective pitch angle of the guide vanes 4. The hub 2 comprises a hub upper part 6 and a hub lower part 7 and comprises assembly recesses 5b, which are disposed between the hub upper part 6 and the hub lower part 7, for the guide vanes 4. The guide vanes 4 have assembly studs 8a, 8b on their outside and inside for fitting into the assembly recesses 5a, 5b. The guide vanes 4 can be fixed or are fixed in the air conduction nozzle 1 with a direction of swirl which is either clockwise or anti-clockwise by pressing the hub upper part 6 and the hub lower part 7 together. The nozzle wall 3 has an upper ring and a lower ring with assembly recesses 5a disposed over the nozzle periphery in a predetermined distribution. The guide vanes 4 each have two assembly studs 8a on their outside, the spacing of which corresponds to the diagonal spacing A of adjacent assembly recesses 5a in the upper ring and lower ring. The assembly recesses 5A in the nozzle wall are forined as holes. The assembly recesses 5a of the upper ring or perforated ring are in axial alignment with the assembly recesses 5a of the lower ring. The guide vanes 4 only have one assembly stud 8b on their inside, e.g. a centrally disposed assembly stud. In addition, the guide vanes 4 have an arcuate shape on their outside and inside which is matched to the internal radius of the nozzle wall 3 and to the external radius of the hub 2, respectively. In the embodiment exemplified, a toothed disc 9 can be inserted and can be turned over according to choice between the hub upper part 6 and the hub lower part 7, and the tooth gaps of the toothed disc 9 form the assembly recesses 5b on the hub side. The tooth gaps 5b are formed as gaps which are slanted clockwise and which after turning over the toothed disc 9 are slanted anticlockwise. The hub upper part 6, the toothed disc 9 and the hub lower part 7 are threaded on a tubular rivet 10 and can be riveted to each other or can be riveted by compression at assembly studs 8b of the guide vanes 4 which fit into the tooth gaps 5b.

6

Claims

1. An air outlet, particularly a ceiling air outlet, comprising an air conduction nozzle having a central hub and having guide vanes for swirl generation which are disposed at a predetermined pitch angle in the air conduction nozzle between the nozzle wall and the hub, wherein the nozzle wall comprises assembly recesses for the guide vanes, which assembly recesses are disposed corresponding to the respective pitch angle of the guide vanes, that the hub comprises a hub upper part and a hub lower part and comprises assembly recesses for the guide vanes, which assembly recesses are disposed between the hub upper part and the hub lower part, that the guide vanes have assembly studs on their outside and inside for fitting into the assembly recesses, and that the guide vanes are fixed in the air conduction nozzle with a direction of swirl which is either clockwise or anticlockwise by pressing the hub upper part and the hub lower part together.

An air outlet according to claim 1, wherein the nozzle wall has an upper ring and a lower ring with assembly recesses disposed over the nozzle periphery in a predetermined distribution, and that the guide vanes each have two assembly studs on their outside, the spacing of which corresponds to the diagonal spacing of adjacent assembly recesses in the upper ring and lower ring.

An air outlet according to claims 1 or 2, wherein the assembly recesses in the nozzle wall are formed as holes.

An air outlet according to any one of claims 1 to 3, wherein the assembly recesses of the upper ring are in axial alignment with the assembly recesses of the lower ring.

An air outlet according to any one of claims 1 to 4, wherein the guide vanes only hav one assembly stud on their inside, e.g. a centrally disposed assembly stud.

4.

5.

1 7 6. An air outlet according to any one of claims 1 to 5, wherein the guide vanes have an arcuate shape on their outside and inside which is matched to the internal radius of the nozzle wall and to the external radius of the hub, respectively.

An air outlet according to any one of claims 1 to 6, wherein a toothed disc can be inserted and turned over between the hub upper part and the hub lower part, and that the tooth gaps of the toothed disc form the assembly recesses on the hub side.

8. An air outlet according to any one of claims 1 to 7, wherein the tooth gaps are formed as gaps which are slanted clockwise and which after turning over the toothed disc are slanted anti-clockwise. An air outlet according to any one of claims 1 to 8, wherein the hub upper part, the toothed disc and the hub lower part are threaded on a tubular rivet and can be riveted to each other at assembly studs of the guide vanes which fit into the tooth gaps.

10. An air outlet substantially as herein before described with reference to the accompanying drawing(s).