FI70636B - SPJAELSPAELL - Google Patents

Description

70636 Slatted damper Spjälspäll

The invention relates to a slat damper for use as a shut-off / control damper in ventilation and air-conditioning systems, comprising a jacket and slats operatively connected to each other in a rectangular flow channel limited by the jacket, the slats being adapted to seal at their ends the slats are adapted to seal together.

There are numerous drawbacks to the slats known today. First, the tightness of the 10 in the closed position is unsatisfactory at best. The installation of a damper has a decisive effect on the tightness and functionality of the damper and its success is usually random. In general, tightness deteriorates significantly with wear phenomena. The damper and its sealing are very sensitive to freezing phenomena. Likewise, thermal expansions and contractions 15 affect the tightness and performance of the damper. A lot of force is required from the damper actuator to obtain a functional tapping solution. The power requirement of the actuator depends on conditions such as temperature, fouling and fogging. This need for power is usually very difficult to predict. The damper is difficult and expensive to manufacture and due to the construction the quality variations are large.

With regard to the state of the art, reference is made, for example, to U.S. Patent No. 3,885,347, GB Patent No. 1,598,645, DE Application Publication No. 2,614,284 and GB Application Publication No. 2,004,054, which disclose the above. described 25 known damper solutions.

For the reasons mentioned above, ventilation and air conditioning plants generally have an energy economy problem, controllability problems and even freezing problems.

70636 1 It is an object of the invention to provide an improvement over the currently known slatted sheet metal solutions. It is a more detailed object of the invention to provide a damper in which the disadvantages of the currently known slats are overcome.

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The objects of the invention are achieved by a slat damper, which is mainly characterized in that the slats are substantially thinner at their end parts than the other structure of the slat.

Other features of the damper according to the invention are set out in claims 2-9.

The slatted damper according to the invention achieves a number of significant advantages. In the slat damper according to the invention, the sealing takes place substantially on the center line of the axes of the slat 15. In the solution according to the invention, the same type of seal can be used both as a slate end seal and as an edge seal. In the sealing solution according to the invention, the sealing member is a substantially tubular sealing member which compresses or compresses. This makes it possible for the solution according to the invention to require only a small amount of power and not for the seal to slide or drag. The sealing solution according to the invention can be fastened in a groove or by means of fastening strips. This solution allows easy replacement of the worn seal.

The invention will be explained in detail with reference to a preferred embodiment of the invention shown in the figures of the accompanying drawing, to which, however, the invention is not intended to be exclusively limited.

Figure 1 shows a preferred embodiment of a damper according to the invention as seen from the flow direction.

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Figure 2 shows a section along the line II-I1 in Figure 1 on a larger scale.

Fig. 3A is a sectional view of a slat damper 35 with oppositely rotating slats.

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Fig. 3B shows a sectional view of a slat damper with parallel-rotating slats.

In the embodiment according to Figures 1-3A, 3B, the damper 5 according to the invention is generally indicated by reference numeral 10. The damper 10 comprises a casing 11 and pivotable slats 12. Reference numeral 13 denotes a seal between the pivotable slats 12. Correspondingly, reference numeral 14 denotes a seal between the edge of the slat and the side 11a parallel to the slat of the casing. Reference numeral 15 denotes a seal 10 between the slat end and the side 11b parallel to the slat end of the casing. Reference numeral 16 denotes the pivot axis of the slats 12.

As shown in Figure 2, the end of the slat 12 has an end portion 17 which forms the cladding surface of the end seal 15. The locking member of the pivot shafts 12 of the slats 12 is indicated by the reference numeral 18 and the bearing of the pivot shafts 16 by the reference number 19. The sealing surface of the edge of the slat 12 is denoted by the reference number 20,20a. The end portion 17 is thinner than the other structure of the slat 12 and is preferably straight.

If the slats 12 in the slat damper 10 turn in different directions, as shown in Fig. 3A, the sealing surface 20a at the edges of the slats 12 seals against the edge seal 14. Correspondingly, the sealing surface 17 at the ends of the slats 12 seals against the end seal 15. In the gaps 13 of the slats 12, it is advantageous to use a pipe seal 13 known per se.

In Fig. 3A, the outer surfaces of the slat are denoted by reference numerals 12a and correspond to 12b, respectively.

If the slats 12 turn in the same direction, as shown in Fig. 3B, a sealing surface 20a can also be used even between the slats 12.

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Thus, in the solution according to the invention, it is essential that the sealing members 13, 20, 14, 20a and 15, 17 are arranged to form a seal with each other in the area substantially delimited by the outer surfaces 12a and 12b of the slats 12 and preferably in the center line. Naturally, the parts forming the middle of the seal 35 can change position, whereby e.g. a tubular seal 15 is fitted at the end of the slat 12 and correspondingly a jacket part 4 70636 sa lib is a sealing surface against which the tubular seal member 15 is arranged to press. All seals 13, 1A and 15 are preferably completely identical.

The sealing members 13, IA and 15 are preferably tubular sealing members.

The sealing of the end of the slat 12 takes place when the end part 17 of the slat 12 presses against the seal 15. Correspondingly, the sealing between the edge of the slat 12 and the jacket 11a takes place when the sealing surface 20a of the edge of the slat 12 presses against the seal IA. The seal 13 between the slats 12 presses against the sealing surface 20 or 20a of the tii-10. The seal 13 is compressed against the seals IA and 15, the seals 13 and IA and 13 and 15 being crosswise.

The mutual position 15 of the end sealing surface 17 of the slat 12 and the end seal 15 in the axial direction of the slat 12 is secured by locking elements 18 on the shafts 16.

Only a preferred embodiment of the invention has been described above, and it will be clear to a person skilled in the art that numerous modifications can be made to it within the scope of the inventive idea set out in the appended claims.

Claims (10)

1. Damper (10) intended to be used as closing / regulating damper in ventilation and air-conditioning systems, to which damper 5 (10) includes a sheath (41) and reversibly mutually operably connected dampers (12) in the mannequin (11) rectangular flow duct, which dampers (12) are arranged to seal from the ends (17) to the male ends (11b), the outermost dampers (12) are arranged to seal from one end (20,20a) to the male ends (11a) and adjacent flaps (12) are arranged to seal between each other, characterized in that the end portions (17) of the slats (12) are substantially thinner than the other construction of the slats. 1 Patent claim Damper damper according to claim 1, characterized in that the cover of the end (17) of the damper (12) takes place while the end seal (15) of the damper is pressed against the sealing surface (17). Damper damper according to claim 1 or 2, characterized in that the sealing between the edge of the damper (12) and the manifold (11a) occurs while the seal (14) is pressed between the edge of the damper (12) and the manifold (11a). 20a). Damper damper according to claim 1,2 or 3, characterized in that the sealing between the dampers (12) occurs while the seal (13) between the dampers (12) is pressed against the sealing surface (20, 20a). Damper damper according to any of claims 1-4, characterized in that the sealing means (13, 14 and 15) are tubular. Damper damper according to any of claims 1-5, characterized in that the mutual position between the sealing surface (17) at the end of the damper (12) and the seal (15) is insured in the axial direction of the damper (12) with welding means (18). shoulders (16). Damper damper according to any one of claims 1-6, characterized in that the sealing surfaces (17, 20, 20a) are straight surfaces.