FI59665C - LUFTKONDITIONERINGSVENTIL FOER ETT RUM ELLER LIKNANDE - Google Patents

Description

@ FINLAND — FINLAND patent publication — patentskrift 59665 (g) Kv.lk. ^ Int.Cl.3 F 24 F 13/02 ® (g) Patent application - Patentansöknlng 700220 ® (g) Application date - Ansöknlngsdag 2U.01.78. @ Starting date - Giltlghetsdag 2U.01.78 g) Made public - Blivlt offentllg 25.07-79 @ Date of sighting and hearing publication— „

Ansökan utlagd och utl.skriften pubi Ice rad <-9 · 0,). 01

National Board of Patents and Registration <§> Patent granted - Patent meddelat 21.06.82

Patent- oeh registerstyrelsen @@ (31) Privilege requested - Begärd priorltet (73) Rakennusvalmiste Oy, 30U20 Forssa U2, Alpo Halme, Norotie 12 C, 0l600 Vantaa 60, Finland-Finland (FI) (72) Timo Aalto, Forssa, Olavi Laurinen, Forssa, Finland-Finland (FI) (7U) Seppo Laine (5U) Room or similar air conditioning valve - Luftkonditionerinps-ventil för ett rum eller liknande The present invention relates to the preamble of claim 1. air conditioning valve.

FI patent publication 5U 19U discloses a silencer for air conditioning ducts, the purpose of which is to attenuate the sound propagating past it in the air conditioning duct or a similar duct by mainly absorbing it. The muffler consists of an elongate absorber body and an elongate annular space between this outer surface and the duct wall. The absorbent body consists of a sheath which may be perforated and which contains a sound-absorbing material. In addition, the absorber body is attached to a valve plate at the mouth of the splice channel manifold.

A disadvantage of the known structure described above is that when the absorber body is cylindrical in shape, the conical ring-shaped flow channel surrounding the valve plate changes from a discontinuous to a cylindrical ring-shaped channel. There are two disadvantages to this flow channel discontinuity. On the one hand, using a conical ring groove to adjust the amount of air becomes cumbersome and, on the other hand, harmful sound formation occurs at the point of discontinuity.

The object of the present invention is to obviate the above-mentioned disadvantages and to provide a new type of air-conditioning valve which, with its damping and flow properties, is more advantageous than previously known.

The invention is based on the idea that the conversion of the conical ring-shaped flow channel into a cylindrical ring takes place in accordance with the profile of the valve-plate jacket by means of an annular recess in the cartridge.

More specifically, the air conditioning valve according to the invention is characterized by what is set forth in the characterizing part of claim 1.

By means of the invention, a very efficient sound attenuation has been achieved by simple means and at the same time a simple possibility of replacing the attenuation element compared to the prior art. The invention will now be examined in more detail by means of exemplary embodiments according to the accompanying drawing.

Figure 1 shows a sectional view of a valve structure arranged in a thick wall.

Figure 2 shows a sectional view of a valve structure fitted to a thinner wall, respectively.

Figure 3 is a partial sectional side view of a sound attenuation cartridge according to the invention.

In the embodiment according to Fig. 1, the valve comprises a duct consisting of a frustoconical part 12 and a cylindrical part 13 leading to the air conditioning flue 10. The duct 12, 13 is horizontal. The valve plate 1 comprises a jacket surface which, like the opening part 12 of the channel, is also in the shape of a frustoconical. It is displaceable in the axial direction of the channel 13 in a manner known per se to adjust the width of the first annular gap 6 between the valve plate 1 and the opening 12.

In the case of the exemplary embodiment, the elongate cylindrical sound-absorbing cartridge 2, which is made of a soft, absorbent material, is attached to the valve plate 1 at its opening from the opening side in a manner known per se so as to move with it. For example, the cartridge is made of glass wool, rock wool or cellular plastic. Its cross-section follows the cross-section of the channel 13 so that a second axial annular gap U with a width of about 15 mm is formed between the channel 13 and the cartridge 2. This gap H can vary in width, for example in the range of 10-20 mm. The other end of the cartridge 2 extends almost to the flue 10 end of the channel 13.

3,59665

The cartridge 2 has an annular recess 3 »close to the inner edge of the opening 12, the profile of which extends along the profile of the jacket of the valve plate 1. In this way, favorable flow conditions are obtained so that the valve itself does not generate an interfering sound.

In the solutions according to Figures 1 and 2, the recess is provided by one tensioning strip 5. In the case according to Figure 3, the number of strips 5 is three. The recess 3 can, of course, also be obtained by removing the material. In the example case, the total length of the cartridge 2 is 133 mm, the diameter 60 mm, the diameter at the recess 50 mm, the width of the recess 35 mm and the axial parts of the cartridge on each side of the recess 50 mm.

In the case of Figure 3, the annular recess 3 is provided by using three 0.8 mm thick galvanized bonding wires.

The structure according to Fig. 2 differs in principle from that according to Fig. 1 only in that it has an additional piece 11 used to extend the channel 13, which causes the entire valve structure to protrude outwards from the thinner wall 9.

The tricky cartridge 2 of the invention can also be attached directly to the channel 13 so that it does not move with the valve plate 1.

The cartridge 2 is preferably split from the valve plate side end so that the plate-like structure 8 starting from the bottom of the valve plate 1 for fastening can protrude into the slit 7 in the cartridge 2.

An axial through passage 7 passes through the cartridge 2 ·

Claims (3)

59665 A room or the like air conditioning valve comprising - preferably a horizontal duct (13) having a room-side opening (12) at least approximately frustoconical, - a valve plate (1) having a jacket surface parallel to the opening (12) as well as at least approximately frustoconical and axially displaceable by the duct (13) for adjusting the cross-sectional area of the first annular gap (6) between the valve plate (1) and the opening (12), and , for example of glass wool, rock wool or cellular plastic, whereby one other axial gap (U) of the material is formed between the channel (13) and the cartridge (2), the width of which does not exceed 30 mm, characterized in that the cartridge (2) has an opening (12) an annular recess (3) at the inner edge, the profile of which at least approximately follows the profile of the jacket of the valve plate (1). Air conditioning valve according to Claim 1, characterized in that the profile of the recess (3) is at least approximately circular. Air conditioning valve according to Claim 1, characterized in that the recess (3) is provided by removing material. Air conditioning valve according to Claim 1, characterized in that the recess (3) is provided by one or more tensioning strips (5) or the like.