FI58823C - ENHANDSREGLERAD BLANDNINGSVENTIL - Google Patents

Description

1. ^, 1 [B] ^ .INCLOSURE 588 2 3

Ma l J l 'utläggningsskrift j C Patent granted 10 04 1031

Patent meddelat ^ 'r ~ ^ (51) Kv.lk? /lnt.CI.3 p 16 K 19/00, 47/02 FINLAND - FINLAND (21) P »tunttlhuk * mu« - P * t * nt »n * 8kiiil | 77020 ^ (22) HakamltpUvi - Aiu6knlng * dag 21.01.77 (23) Alkuplivl — Glltl | h «tsdt | 21.01.77 (11) Come Public Revenue - Bllvlt offuntllg 22.07.78

Patent · js rakUterihallittn Niht »y» k.ip «o« |. date of month. _

Patent · och regtoterstyralten AntBkan uttagd oeh utl.tkrlfwn published 31.12.80 (32) (33) () 1) «tiMlkMt — Bugftrd prlorltet (71) K. Oras Oy, Rauhankatu 28, 28100 Rauma 10, Suomi-Finland (FI) (72) Risto Antero Saarisalo, Kuolimaa, Jorma Tapani Koppanen, Rauma,

Suomi-Finland (FI) (7 * +) Berggren Oy Ab (51 *) Single lever mixer valve - Enhandsreglerad blandningsventil

The present invention relates to a mixing valve adjustable by a single operating lever according to the preamble of the appended claim. Mixing valves of this type are already known, for example, from F1 patent application 760655 and DE publication 1 282 395.

The object of the present invention is to improve the operating characteristics of the mixing valve and in particular to reduce the noise caused by the valve compared to known solutions, and to fulfill this function the invention is characterized by rounded edges of the openings in the movable ceramic plate.

Although rounding the edges of the flow channels in the valves is known per se, it has not previously been possible in this type of mixing valves, where the edges of these openings have at the same time acted as closing edges and thus sharp edges have been necessary for valve operation.

2 58823

The invention and its other features and advantages will be described in more detail below by way of example with reference to the accompanying drawings, in which Figure 1 shows a cross-section of a mixing valve according to the invention, Figure 2 shows the closure of Figure 1 in a bottom perspective view seen, Fig. 4 is a perspective view of the lower ceramic plate seen from below, and Figs. 5-7 show the mutual positions of the ceramic plates.

The structure of the mixer is shown in Figure 1. The body of the mixer is marked with the number 1 and the cold and hot water come through pipes 2 and 3. The solid ceramic plate is marked with the number 4 and the inlet waters discharge through the solid ceramic plate through the openings 5 and 6 joining the pipes 2 and 3. The fixed plate 4 also has a mixed water discharge opening 13. In cooperation with the fixed ceramic plate 4 and its openings 5 and 6, there is a movable ceramic plate 8 with corresponding openings 9 and 10. The operation between the plates will be described in more detail in connection with Figures 2-4.

The upper movable ceramic plate 8 is connected to a movable mixing body 14, which may be of plastic, and which is articulated to the lever 7 to provide an adjustment movement. The body 14 has a pin, i.e. a projection 15, which is guided in a groove 16 in the body of the mixer. The sealing of the connection between the shutter body 14 and the ceramic plate 8 is ensured by a sealing ring 17.

The connection of the plate 8 to the mixing body 14 is effected through the pins 23 and the recesses 24 in the plate (cf. Figures 2 and 3) in the sliding direction of the ceramic plates fixedly and resiliently in the direction perpendicular thereto. There is a notch on the edge of the fixed ceramic plate 4 (Fig. 4) to prevent it from twisting.

3 58823

The relative positions of the ceramic plates 4 and 8 are shown in Figures 5-7. Figure 5 shows the water inlet completely closed. Fig. 6 shows a case where water mixing takes place, and Fig. 7 shows a case where only another, for example warm water, can flow when the cold water inlet is closed.

Water is discharged through the openings 9 and 10 in the upper ceramic plate into a wide uniform mixing chamber 11 formed by the mixing body 14 and the ceramic plate 8.

In the mixing chamber structure shown, the water pressure cannot in any case separate the ceramic plates from each other. For example, in the closed position (Fig. 5), the pressure acts to lift the plate 8 from below through the cross-section of the holes 5 and 6, but the lower plate 4 follows with the effect of its flexible supports 18 and 19.

A more difficult case occurs if water flows from the valve and there is back pressure in the outflow channel 13. In this case, the pressure acting on the entire opening surfaces 9, 10 and 12 of the sealing plates could tend to push the plates apart, but the vertically flexible connection of the ceramic plate 8 and the mixing body 14 acts so that the area of the resilient seal 17 counteracts the above release force. a very pressure-resistant construction is obtained with a small amount of raw material.

Measurements have shown that the mixer tends to be loud if the mixing chamber 11 is narrow. The sound can be slightly attenuated in a manner known per se by fitting into the mixing chamber, e.g. However, this is relatively susceptible to clogging.

A better result is obtained by making the mixing chamber sufficiently spacious as shown in the figures and by shaping the inner curves 20, 21 and 22 of the openings (Figure 3b) in accordance with the invention to be flowable. This is made possible in practice by the separate parts 8 and 14 both economically and technically, and this is correspondingly not possible if a recess has been made in the movable plate, as in the case of the previous patents. The loudness is significantly reduced, especially when the volume of the chamber is so large that the flow rate in the chamber drops to less than half the speed at the inlets.