FI61093B - REGLERANORDNING FOER INBLAOSNINGSLUFT - Google Patents

Description

I. -., - "Ί Γ1 .... ANNOUNCEMENT £ ή Γ) Q 7 W« W (11) UTLAGG NI NGSSKRI FT 6IU ^ (45) '^' (51) Kv.lk?/Int.CI. 3 p 24 F 13/06 FINLAND I - FI NL AN D (21) P »unttlh» k «mu« - P «t« ntan * 6knlng 790083 (22) Hakcmlipilvl - Arwöknlng * d »g 10.01.79 (23) Alkupilvt —Glltlghatsdag 10.01.79 (41) Become public - Bllvit off.ntllg 11.07 · 80

National Board of Patents and Registration .... ...... ...,. , _ '. (44) Date of issue and date of issue. -

Patent- och registerstyrelsen v 'AndJktn utlagd och utl.ikrlft.n publlcarad 29-01.82 (32) (33) (31) Pyydetty «uolkau» —- Begird prlorltat (71) Fincoil -ollisuus Oy, 01230 Vantaa 23, Finland-Finland (FI) ^ (72) Pauli Grönberg, Espoo, Finland-Finland (FI) (74) Seppo Laine (54) Supply air control device - Re.gleranordning för inbläsningsluft The present invention relates to a control device according to the preamble of claim 1.

Perforated diffusers which can be mounted on the ceiling or in a free space are already known. These diffusers are used for air distribution in low and high rooms when a horizontal throw length as well as good miscibility of the room air is desired. In said diffuser, inlet air is blown from its side perforation along the ceiling, while through the perforation of the end of the diffuser, in particular the lower perforation, room air is mixed in the diffuser.

The above and other similar air dispersing means are used in a variety of applications so that it is often necessary to adjust the air throw length and throw pattern.

Methods are already known in which the air distribution member is provided with a high-pressure nozzle, the flow provided by which supports the main air flow from the diffuser 2 61093 and by which the discharge length of the main air flow is kept constant, e.g. These main air flow support methods based on the use of high-pressure nozzles are especially needed when low-temperature air is blown from the manifold and when it is necessary to adjust the amount of air to be blown and the throw length. A disadvantage of these previously known high-pressure nozzles has been that the throw length and throw pattern of the air distribution member could not be adjusted within a sufficiently wide range under varying operating conditions. The disadvantage has also been the complexity of the structure and arrangement of the previously known devices. It is an object of the present invention to avoid these drawbacks.

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Suomen Puhallintehdas OY 's publication "Air volume controlled OPTIVENT air conditioning system" is known for a structure with a higher pressure inlet pipe and an inlet diffuser, which can have a 2 - k direction. However, the shower openings in this structure cannot be individually covered and opened.

It is therefore an object of the present invention to provide a throw length and / or throw pattern adjustment device which allows the throw length and / or pattern to be adjusted within a wide range and which is simple and easily adaptable to previously used blowing and dispersing members.

In order to achieve the above objects, the invention is mainly characterized by what is set forth in the characterizing part of claim 1.

The invention will now be described in detail with reference to an embodiment of the invention shown in the figures of the accompanying drawing.

Figure 1 shows an axonometric view of an injection and dispersing element provided with a control device according to the invention.

Fig. 2 shows a schematic side view of the arrangement of a control device according to the invention in connection with an air conditioning duct.

Figure 3 shows a central vertical section of a control device according to the invention.

Figure H shows a section IV-IV in Figure 3.

3 61093

According to Figs. 1 and 2, a pressure relief device 11 is arranged in the air conditioning duct 10a, after which an air blowing and dispersing member known per se is arranged in the duct part 10b by means of a connecting pipe 10c. The pressure p ^ before the pressure reducing device 11 is 150 ... 600 Pa and the pressure p ^ in the channel part 10b is 40 ... 100 Pa.

The air blowing and dispersing member consists of a pipe section 14 with which it is connected to the connecting pipe 10c of the air conditioning duct. The dispersing member has a truncated pyramid-shaped body part 15 associated with the pipe part 1H, which is fixed, for example, in connection with a lowered roof 19. In the normal operating position, the diffuser has a horizontal perforated end plate 17. A side perforation 18 surrounds the outer circumference of the diffuser, through which the supply air is blown into the room, e.g. along the ceiling. This flow is illustrated by the arrow F. The lowering 17 of the end plate causes the mixing of room air in the diffuser.

According to the invention, a pipe 12 is led to the diffuser from a part 10a of the air duct having a higher pressure, i.e. a part before the pressure reducing device 11. A control device according to the invention is connected to the pipe 12 by a bend 13, the more detailed structure of which can be seen in Figures 3 and 4.

The adjusting device 20 comprises a pipe part 21 which goes tightly over the bend 13 of the pipe. The pipe part 21 enters the opening made in the perforated end plate 17. The pipe part 21 is sealed with ring parts 22a and 22b projecting from the inner surface of the pipe part 21. Thus, an effective seal is obtained using suitable adaptations. Instead of the ring parts 22a and 22b, only one ring part or, if necessary, more than two ring parts can be used. Separate, e.g. elastic, sealing rings can be used instead of ring parts of the same material as the tube part 21, although the structure shown in the figures is simpler and more cost-effective to manufacture.

The lower end of the pipe part 21 has a flange 23 to which an end plate 24 is fastened with screws 25. The end plate 24 has an edge part 26 into which four spray openings 28a, 28b, 28c and 28d are made according to Fig. 4, between which the edge parts 26 abut the lower surface. The screws 25 come at the points indicated by reference 27. Both the lower surface of the flange 23 and the upper surface of the end plate 24 have aligned arcuate grooves fitted with adjusting strips 30a, 30b, 30c and 30d for adjusting the size of the jet openings 28a, 28b, 28c, 28d. As shown in Figure 4, the strips 30a and 30c are moved to a position where the spray openings 28a and 28c are completely closed, while the strips 30b and 30d are 4 61093 in a position where the spray openings 28b and 28d are completely open. The outer end of the strips 30 has a small hole 31 into which a pointed spike can be inserted, by means of which the strips 30 can be moved in their grooves 29.

The above device works as follows. A flow F is discharged from the side perforation 18 of the dispersing member, having a certain throw length and throw pattern. From the control element 20 according to the invention, jets J with a higher velocity are directed under the flow F and thus the flow F is supported as is known per se. The higher the flow velocity of the jets J, the greater the support effect of the flow F and the longer the throw length of the flow F. Using the control device according to the invention, the speed of the jets J in the different radial directions of the diffuser can be controlled by means of the strips 30 and thus the throw length and the throw pattern can be controlled. For example, when the openings 28b and 28d are adjusted to be fully open according to Fig. 4 and the openings 28a and 28c blowing in opposite directions are completely closed, the maximum throw length is obtained in the directions of the openings 28b and 28d, i.e. the jets J (Fig. 4). directions, i.e. in the perpendicular radial direction, a minimum throw length is obtained. In this way, the throwing pattern of the air diffuser can be adjusted to be very elongated and narrow.

The invention is in no way limited to the details described above by way of example only, which may vary within the scope of the inventive idea defined by the following claims.

Claims (3)

5,61093 A device for adjusting the throw length and / or throw pattern of an air blowing and dispersing member arranged in connection with an end plate of a dispersing member, more preferably in the middle of a perforated end plate (17) surrounded by a side perforation (18) or similar gap through which the inlet air is blown, the control device consisting of a pipe part (21) fixed to the inlet pipe (12) of higher pressure (p 1) and having an end plate (2h), which has a jet opening arrangement (28a, 28b, 28c, 28d) in connection with the edge parts (26) ), which in turn has an adjustment strip arrangement (30a, 30b, 30c, 30d) by means of which the size of the jet orifice arrangement (28) and thus the support effect of the jets (j) coming through it can be adjusted, the jet orifice arrangement comprising at least two and preferably four jet orifices (28a, 28b, 28c, 28d), characterized in that the shower openings (28a, 28b, 28c, 28d) are arranged to be individually covered and opened by separate adjustment strips (30a, 30b, 30c, 30d). iksi. Device according to claim 1, characterized in that the adjusting strips (30a, 30b, 30c, 30d) are arranged to be displaceable in grooves (29) which are circular in shape and so arranged that each of them in pairs is located in the end plate (2h) of the adjusting member. and others in the end flange (23) of the pipe part (21) of the adjusting member. Device according to Claim 1 or 2, characterized in that the adjusting strips (30) are circular in shape and have a small hole (31) at one end into which the position of the adjusting strips can be changed by means of a push-in spike.