FI66067C - LJUDDAEMPNINGSANORDNING FOER EN BLANDNINGSVENTIL - Google Patents

Description

J'Vw! ΛΜ .. ADVERTISEMENT

W (11) utlAgoningsskrift 660 6 7 ^ T ^ (51) KrJk? Flnt.CL3 F 16 K 47/02, 19/00 FINLAND —FINLAND (21) Ρ * · η «Ι ^ · ιη« ι «—Ptt. nwndJtolni 802787 (22) Hikwntapllv · —AiwOknlngadag 05.09.80 '^ (23) Alkupttvt — Glltl | h * tKUf 0 5.0 9.80 (41) Tullut jtf IMmIuI - Bllvlt ofr «ntll (06.03.82

Patent · la register held * ... .......... . „_. . (44} Date *) Date of entry and date of issue. -

Patent · och regiaterstjrrelsen Anaekan utbfd och uti.xkrtfc «n publtcend 30.04.84 (32) (33) (31) Pyy * ·» / «uolkaua — B« (trd prlorltut (71) K. Oras Oy, Rauhankatu 28, 26100 Rauma 10, Finland-Finland (FI) (72) Risto Antero Saarisalo, Kuolimaa, Jorma Tapani Koppanen, Rauma, Finland-Finland (FI) (74) Berggren Oy Ab (54) Silencer for mixing valves -Ljuddämpningsanordning för en blandningsventi1

The present invention relates to a sound attenuation device in a mixing valve comprising a valve body, a fixed ceramic plate housed in a housing in the body having hot and cold water inlets and a mixed water discharge port, a movable ceramic plate having a hot plate orifice cooperating with the hot plate openings for controlling flows, wherein a plastic body is attached to the movable plate, the recess in the lower surface of which together with the movable plate forms a water flow space, and the lower surface of the plastic body has integral ribs extending parallel to and substantially in the normal plane of the moving plate.

It is already known to design the water mixing chamber in different ways in order to provide sound attenuation. It is known to place screens, various sound-absorbing materials and air-filled rubber pads in the chamber, and it is also known to shape the chamber, in particular to provide its bottom with grooves and protrusions to provide sound attenuation.

On the basis of FI patent application 773703, it is still known to provide the bottom of a movable plate with mutually parallel recesses and protrusions for damping the sound of water flow. The application describes protrusions transverse to the flow direction, which cannot provide laminar flow. There is also a mention in the text that the ridges may be parallel to the flow, although this is not further illustrated. It should be noted, however, that the teaching of the application is that the protrusions are provided directly on the ceramic plate, as a result of which it is already clear that the protrusions cannot be so high as to provide substantial sound attenuation due to flow control.

The object of the present invention is to ensure laminar flow and through it effective sound attenuation in mixing valves of the type mentioned in the introduction, in which a plastic body attached to a movable ceramic plate is used to form a mixing chamber. The sound attenuation device according to the invention is characterized in that said ribs at opposite edges of the opening of the movable plate extend down substantially to the interface between the movable plate and the fixed plate.

The ribs according to the invention can thus be molded simultaneously with the production of the plastic body and the ribs can advantageously be curved at their lower edges when viewed in the water flow direction, the longest parts of the ribs being naturally located at the opening of the movable plate.

The invention and its other features will now be described in more detail by way of example and with reference to the accompanying drawings, in which Figure 1 shows a sectional and side view of a one-handed mixing valve equipped with a silencer according to the invention, Figure 2 shows a mixing chamber silencer on a larger scale a section similar to Figure 2 of a slightly modified silencer.

3 66067

The mixing valve shown is of a generally known type and its operation will not be described in detail in this connection. The valve comprises a body 1, in the housing of which the essential parts of the valve are placed. A fixed ceramic plate 2 is sealed relative to the body, with hot and cold water inlets 7 on the right side of Fig. 1 (only the second shown) and a mixed water discharge opening 8 on the left side. A surface-moving ceramic plate 3 is sealed with respect to the fixed plate 2. is further tightly attached to the movable plastic body 4. The movement of the plastic body and the movable ceramic plate is effected by a lever 5 mounted on the frame, to which the hand lever 6 is attached.

The movable plate 3 has an opening cooperating with the openings 7 of the fixed plate, which regulates the flow of hot and cold water in a known manner and which, together with the plastic body, also forms a water flow space. From the discharge opening 8, water enters the billing pipe 9.

It is essential in the invention that the lower surface of the plastic body 4 is formed with one parallel ribs 10 extending thereto and extending substantially in the direction of water flow. The arrangement of the fins is best seen in Figure 2. They provide good sound attenuation and at the same time are simple to manufacture. The ribs 10 are preferably curved at their lower edges, as shown in Figure 1. At the edges of the opening of the movable plate 3, the ribs extend downwards to the interface between the plates 2 and 3. The thickness of the ribs may be, for example, about 0.6 mm and their spacing about 0.6 mm.

Figure 3 shows a slightly different implementation from Figure 2, in which the middle rib 10 extends along its entire length down to the interface between the plates. In this way, a separation of hot and cold water channels known per se is provided before the discharge opening 8.

Claims (3)

A sound-absorbing device according to claim 1, wherein the fixed plate (2) has, on one side, hot and cold water inlets (7) on one side and a mixed water discharge opening (8) on the other side, characterized in that the lower edges of said ribs (10) with the exception of the rib, are curved in said direction so that the ribs extend deeper downwards at the inlet openings and the discharge opening. Sound-absorbing device according to Claim 2, characterized in that the central rib (10) extends over its entire length up to the interface between the downwardly moving and the fixed plate. 1. In the case of air conditioning and cleaning valves, to which the valves are exposed (1), to the fast ceramic body (2) to be used in the manufacture of air valves (7) for the purpose of bleaching the wool, in the case of a ceramic wool (3), in which the wool is used for the adjustment of the wool and the wool of the wool in the case of the wool