FR2489920A1 - HOT WATER MIXER WITH MANOEUVRE LEVER AND CYLINDRICAL SEALING MEMBRANE FOR SAID TAP - Google Patents

Abstract

A.ROBINET HOT WATER MIXER WITH OPERATING LEVER AND CYLINDRICAL SEALING MEMBRANE. B. CHARACTERIZED IN THAT THE MEMBRANE IS THIN IN A NARROW AREA ALONG A LINE SURROUNDING THE WATER INLET PORT IN THE CHAMBER. C. MEMBRANE APPLICABLE TO A HOT WATER MIXING VALVE.

Description

The present invention relates to a water mixing valve with a lever of

maneuver provided with a membrane

  ring-shaped sealing ring made of elastic material

  rubber, tap, with operating lever, and a cylindrical chamber which has substantially the same diameter as the outer periphery of the membrane, in the periphery of which opens at least one water inlet, and wherein the membrane of sealing can be mounted in such a way that it covers this water inlet, and with a pressure body disposed inside the chamber and the membrane, which, by actuation of the valve operating lever, is pushed back in the field of the water supply, against the inner periphery of the membrane which thus comes to apply sealing against

  the edge of the finish and closes it.

  A membrane of this kind is known as well as a

  valve provided with this membrane according to patent DE 11 76 943.

  In the known embodiment, this is

  mixer tap with operating lever, in the chamber

  Cylindrical head which open, at opposite points, a supply of cold water, and a supply of hot water. The pressure body is guided to move in a slide parallel to the line of junction between the two arrivals. It is moved by means of an eccentric engaged with it, which can be actuated by pivoting the valve operating lever. In an extreme position, the pressure body and the waterproofing membrane are pushed in front of one of the arrivals, out of which consequently no water can escape. In

  the other extreme position is the other arrival which is closed.

  Intermediate positions provide a mixture at a time

  determined temperature. The water passes, free circulation, through the slot between the waterproofing membrane and in front of the inner periphery of the cylindrical chamber in the axial direction

  and it is transmitted inside the membrane.

  The operation of such a mixing valve essentially depends on the rigidity and elasticity of the sealing membrane. In the known embodiment, the membrane has, in the two areas of seal, a substantially identical thickness. As a result, it is inherently relatively rigid and the operating lever of the mixing valve must be rotated at a relatively large angle to obtain specified flow rates for both water supplies. This is particularly noticeable in the case where it is a mixing valve in the hot water supply of which is provided a circulating water heater which requires for its start a minimum flow determined, that is to say say a difference

  determined minimum pressure. The particular property

  of the known waterproofing membrane, because of its inevitable rigidity, consisting of a relatively delayed release of the water supply in question, has the consequence that the operating lever must first be rotated by an angle

  really important until the heater turns on.

  However, this already leads to the shutter body at least partially closing the supply of cold water, so that when the hot water supply flow is established, it is in the presence of a some excess hot water and that the mixture is very hot at once. The position adjustment domain of the

  operating lever for determining different temperatures

  the temperature of the cold water to the full hot water temperature is in a relatively low pivot range of the faucet lever, which requires great attention when adjusting the water temperature of

mixture provided.

  The aim of the invention is to produce a membrane

  according to the preceding description, and a tap

  corresponding mixer, as they respond more quickly to changes in the position of the operating lever and the body

pressure.

  For this purpose, the mixing valve according to the invention is characterized in that the membrane is thinned in its thickness in a narrow zone, along a line

surrounding one of the water supplies.

  This gives the domain ensuring the

  and, on the other hand, allowing the exit of the water in the periphery of the water inlet, is separated, by the thinned zone of the surrounding area from the wall of the membrane, and that

  makes it easy to move in the radial direction

  the thinned zone. A fool of windows is thus formed.

  which is movable almost independently of the surrounding outer areas of the membrane. In any case, the

  displacement occurs more easily than if the membrane pre-

  felt everywhere the same thickness and that, consequently, the displacement of the part directly in front of the supply

  had to occur through a curvature of the wall and deformation

  of it throughout its entire thickness. It has been found in tests that, thanks to the invention, already during a very small displacement of the pressure body, the membrane releases for the water a passage under

  the effect of the pressure of the water present in this feed.

  In the case of a mixing valve with operating lever, the flow of hot water, already for small pivoting angles of the control lever, results in a flow of water sufficient to trigger a flow. of the water heater. At these little ones

  turning angles, the supply of cold water is still

  that completely released, so that the mixing water still contains a relatively large proportion of cold water. Thus, already for low angles of rotation of the

  operating lever, hot water is available, the tempera-

  can be increased at will by one more rotation

  important of the operating lever. This increase in the

  The mixing water temperature with pivoting leverage is essentially slower, and the temperature setting is less critical than in known mixer models. In addition, it has been found that the production of noise is significantly lower than with the membranes

known sealing.

  According to the invention, the thinning is formed by a groove in the peripheral surface of the membrane, and preferably on the outer face of the membrane to avoid complications in its cooperation with the pressure body. According to the invention, the inner radial limit of the groove is formed with formation of a lip surrounding the water supply. In this way, the window limiting the groove is surrounded by a chamber formed in the valve relative to the inner periphery of the cylindrical chamber. This lip seals the inlet of blocked water, thanks to this

pressure effect of water.

  According to the invention, the groove has, on the periphery of the membrane, a U-shape, whose branches extend to the edge of the membrane. On the other hand, the edge of the membrane has a hollow in the axial direction, which extends over a large part of the edge area between the branches of the U, and forms the lip acting against

  the outer circumference of the membrane. -

  The invention extends to a cylindrical membrane and a mixing valve designed specifically for the tap

of the kind described above.

  The following description refers to an example

  Embodiment of the invention with reference to the accompanying drawings, in which - Figure 1 is a vertical sectional view.

  through a mixing valve with operating lever and mem-

brane according to the invention.

  - Figure 2 is an elevational view through the

bottom of the membrane.

  FIG. 3 is a sectional view through III-III

of Figure 2.

  FIG. 4 is a side elevational view

of the membrane.

  FIG. 5 is a sectional view through V-V of

Figure 4.

  - Figure 6 is a graph of the temperature

  mixing water according to the swivel angle

of the operating lever.

  In Figure 1, there is shown a tap

  mixer with a single operating lever designated as a whole

  10. It comprises a casing 4 with an attachment

  - Dice of attachment 2 to a single bore, and provided with the cold water inlet 5 and hot water 6, and a hose 3 outlet flow of the mixing water. In the casing 1 is formed a cylindrical chamber 4, in the cylindrical periphery surface 4 'from which open the hot water supply

6 and cold water 5.

  In the cylindrical chamber 4, is mounted a

  ring-shaped cylindrical sealing membrane 7 made of

  a rubber-elastic element which covers the water inlets and 6 and which is held in a ring 8. This membrane 7 does not extend over the entire height of the cylindrical chamber 4, but leaves its lower part 9 free. The membrane 7 is constituted in such a way that, under the action of the pressure

  hot water arriving via the supply 6 and cold water arriving

  5, it is pushed back and away from the inner periphery 4 'of the cylindrical chamber 4, so that the water can pass between this periphery 4' and the membrane 7, so that

  to reach the lower part of the chamber, where

  then draws a mixture of water from each of the feeds and 6. This mixing water passes into the channel 12 and from there

  it reaches the outlet pipe 3.

  Inside the cylindrical membrane 7, is disposed a pressure body 14 which is guided in a slide to move parallel to the dummy junction line between the water supply 5 and 6. This body can be moved, at the

  medium of an eccentric 43 engaged with him, from a posi-

  1, in which it is applied on the side of the supply, from the inside, against the diaphragm 7 and closes this supply, towards an offset position, in which it is applied against the inner face. of the membrane 7. The

  representation of water in Figure 1 corresponds to the situation

  for which previously mixed water is first delivered, after which water switching occurs.

  cold and the outlet pipe is closed.

  The actuation of the eccentric 43 is carried out

  by a rotational movement of the head 16 of the mixing valve

  10 by means of the operating lever 15 about the axis 14.

  The amount of mixture delivered to the outlet 3 is adjusted by pivoting the operating lever 15 upwards or downwards in the direction of the arrow 17. In this way, a ceramic plate 18 is moved which is disposed between two other ceramic plates 19 and 20 which are mounted in the upper part of the mixing valve 10. These ceramic plates 18, 19, 20 are sealingly applied to one another by their planar face. They have through passages 22 which can be made to overlap more or less by pivoting the operating lever 15 in the direction

  arrows 17, so that a section of

  wise variable for mixing water discharged through the pipe of

exit 3.

  The membrane 7 is in the form of a short section of pipe and is shown in particular in FIGS. 2 to 5. It has, on each of the sides which are in front of the feed orifices 5 and 6, a groove 23 which surrounds the zone of application, which extends in U-shape and which opens, with the branches of the U, on the lower edge 24 of the membrane 7. The groove 23 constitutes a thinned area in the thickness of the membrane 7, so that the inner portion 25 shaped window (Figure 4) which is directly in front of the

  5, 6 can move radially with distortion

  of the thinned zone in the area corresponding to the groove 23. The membrane zone which serves to seal or to release

  a section of passage on the zones 25 of the surrounding membrane.

  As a result, the feed orifices 5 and 6 can be moved relatively easily, without the need for significant curvature deformation of the wall portions.

  in the vicinity of the supply orifices 5 and 6.

  The cup 23 is cut back towards the inner area 25 at 26, so that a sealing lip is formed essentially bypassing the supply orifices 5, 6, which facilitates sealing inside the membrane. already created by the inner pressure. So that the effect of the lip occurs even on the lower edge 24 of the membrane 7, it is provided substantially in all of the part of its periphery lying in the zone

  25, of a V-shaped groove 27, as shown in FIG.

  The groove 27 also forms a sealing lip 37, which is completed with the sealing lip 28 in the U-shaped groove 23. The pressure body 14 acts inside the

  radially against the inner circumference of the mem-

  7. In the areas situated between them 29, provision is made

  flat recess 30, which serves to reduce the thickness of the mem-

  in these areas and thereby increase the mobility of

areas 25.

  In Figure 6 is mounted, with a mixing valve provided with an operating lever, a circulating water heater in the hot water supply pipe. The graph shows the temperature curve of the water mixture as a function of the pivot angle of the operating lever 15 about axis 14.

  Curve 31 designates a dependence of the time

  in the case of a mixer tap of construction

  known to this day while in curve 32, is reproduced

  the variation of the temperature in the case of a valve provided with a membrane according to the invention. The water heater mounted in the water pipe

  For its start, a hot water flow

  mine. Due to the inevitable relative stiffness of known cylindrical membranes, this point is reached only after a

  relatively large swivel angle, which in the example

  represented, amounts to about 70 degrees. The water heater, in the known embodiment, therefore only triggers

point 33.

  In the embodiment with a membrane according to the invention, which is represented by the curve 32, the operating trigger of the water heater already occurs for a much lower deviation of the lever of

  maneuver 15, namely for only 40 degrees, at point 34.

  The range of the curve disposed between the brackets 35, which includes mixing temperatures usually considered pleasing, extends with a much more flattened appearance than the corresponding domain of the curve 31 which corresponds to the old embodiment. In the field 35 which

  extends, in the exemplary embodiment, to a pivot angle

  Between 50 and 120 degrees of the operating lever, the increase in the temperature of the mixture is much slower than in the curve 31 corresponding to the old model. The desired mixing temperature in the range of 30 to 400 can thus be set much more

easily.

Claims (4)

  1) Water mixing valve (10) with operating lever provided with an annular cylindrical sealing membrane of rubber elastic material (7), valve with operating lever, and a cylindrical chamber (4) which has substantially the same diameter as the outer periphery of the membrane (7), in the periphery of which opens at least one water inlet (5, 6), and wherein the sealing membrane can be mounted in such a way that it covers this water inlet, and with a pressure body (14) disposed inside the chamber and the membrane, which, by actuation of the operating lever (15) of the tap, is pushed back, in the area of the water supply, against the inner periphery of the membrane which thus comes to apply to sealing   against the edge of the arrival and closes it, a typical faucet   in that the membrane (7) is thinned in a narrow zone   along an outer surrounding line the water inlet (5, 6).   ) Valve with sealing membrane according to claim 1, characterized in that the thickness thinning is formed by a groove (23) provided in the surface around the membrane (7).   ) Faucet with membrane according to the claim   2, characterized in that the groove (23) is provided on the   outer face of the membrane (7).   40) Tap according to one of claims 2   or 3, characterized in that the inner radial restriction of the groove is cut backwards to form a lip   sealing member (28) surrounding one of the water inlets (5, 6).   ) Faucet according to any one of the   2 to 4, characterized in that the groove (23) has on the outer periphery of the membrane (7) a U-shape   whose branches extend to the edge (24) of the membrane.   6) Diaphragm valve according to any one   conque of claims 1 to 5, characterized in that the edge   (24) of the membrane (7) has a hollow (27) forming a sealing lip acting against the periphery of the membrane   (7) and extending in an axial direction over an important portion   edge aunt (24) lying between the branches of 1'U.   7) Elastic Rubber Rubber Sealing Membrane, specially designed for   valve according to any one of claims 1 to 6.