DE2947228A1 - Safety water mixer tap coupled to low pressure reservoir - has openings in relatively rotatable discs arranged to give wide regulation range - Google Patents

Abstract

The tap has a stationary control disc (1) with three openings (3,4,5) through it, communicating with the cold water feed, the discharge line and a low pressure reservoir. The control disc (1) is overlaid by a regulating disc which rotates relative to it and has two openings overlapping the first opening (3) in the control disc (1) in all axial positions and progressively uncovering the second opening (4) in the control disc (1) in dependence on its angular position. The second and third openings (4,5) in the control disc (1) crescent shaped. The angle covered by the sum of the openings in both the discs is greater than 360Deg.

Description

PATENT LAWYERS

ζ ·

DR. ULRICH OSTERTAQ

DR. REINHARD OSTERTAQ

ElBENWEQ 10, 7000 STUTTGART 70, TELEPHONE 07 11 * 76 08 48, CABLE: OSPAT

Safety mixer tap for low pressure storage

Applicant:

Hansa Metallwerke AG Sigmaringerstr. 107 7000 Stuttgart 81

Lawyer file:

841

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description

The invention relates to a safety mixer for Low pressure accumulator with

a) a fixed control disc (fixed disc) with a first passage opening, which is connected to a cold water inlet channel communicates; with a second passage opening, which communicates with a channel leading to the outlet; with a third passage opening, which communicates with a channel leading to the low-pressure accumulator;

b) one lying on the fixed disk, opposite this rotatable second control disk (regulating disk) with at least two passage openings; c) a device which creates a watertight connection between the two passage openings of the regulating disk manufactures;

the first passage opening of the regulating disk at least the first opening in all open positions of the valve the fixed disk at least partially overlaps and the second opening of the regulating disk when rotating in the opening direction first releases the second opening of the fixed disk progressively and then, with further rotation in the same direction, the second opening closes to the same extent as it closes the

third opening of the fixed disk releases, according to patent

(Patent application P 29 12 909.7).

In the case of the safety mixer of the type mentioned proposed in the main application, the passage Openings of the two control discs take the form of circular ring segments. The radially outer and radially inner boundary lines these passage openings lie on two concentric circles, the center of which with the center the control disks coincides.

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Due to the function of this safety mixer, the minimum number of passage openings is in the two Control discs specified. The chosen arrangement and design of the passage openings requires that the sum the included angle cannot exceed 360 °; these 360 ° are only a limit anyway, the therefore cannot be achieved because separating webs have to remain between the individual passage openings. Due to these circumstances, it is only to a limited extent with the proposed safety mixer tap possible to increase the control range by setting the mixed water temperature. This would be for convenience however, highly desirable to the user. In addition, the effective flow cross-sections the passage openings can only be enlarged by that the radii of the control disks are selected to be correspondingly larger.

The object of the present invention is to provide a safety mixer tap of the type mentioned in such a way that, with a compact design, large control ranges and large flow cross-sections can be achieved.

This object is achieved in that the two passage openings of the regulating wheel one in the circumferential direction (azimuthally) extending boundary line, whose radial distance from the center of the control disk varies (sickle-shaped passage openings) and that the sum of the passage openings of the two Control discs included angle is greater than 360 °.

With the design of the passage openings according to the invention The radial dimensions of the control disks are also used in the two control disks. To this Way can one end of a passage opening in one

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Control disk a passage opening of the other control disk "submerge" in the closed position, as described in more detail below.

5 Advantageous developments of the safety mixer tap according to the invention are specified in the subclaims.

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An embodiment of the invention is based on the following the drawing explained in more detail; show it

Fig. 1 is a plan view of a stationary according to the invention Control disk (fixed disk);

2 shows the plan view of a rotatable control disk (regulating disk);

Fig. 3 schematically shows the control disks of FIGS. 1 and 2, one above the other in the closed position;

Figs. 4a and 4b schematically show the control disks of FIGS. 1 and 2 in different open positions, one above the other.

The control disk 1 shown in Fig. 1 is positively locked on a not shown company or guide part arranged so that it can be rotated by hand.

It is therefore also referred to below as the regulating wheel. The positive locking is effected by projections not shown, which engage in circumferential recesses 2 of the regulating wheel 1. The regulating wheel 1 has three passage openings 3, 4 and 5, the function of which will become clear below. The first passage opening 3 is circular in cross section and concentric to the regulating wheel 2. The other two passage openings 4 and 5, the ones on both sides of the center point are arranged, are characterized by a "sickle-shaped" shape. That is, the width of these through openings 4, 5 changes in the circumferential direction, in the illustrated Embodiment grows clockwise. This shape can be obtained, for example, in that one of the two running in the circumferential direction (azimuthal) Boundary lines is an arc of a circle, the center of which coincides with the center of the pane (at the opening

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4 the one located radially on the outside, at the opening 5 the radial one inside), while the other azimuthal boundary line is an arc, the center of which is opposite the Disk center point is offset (with opening 5 the radial outer boundary line.)

Of course, the sickle shape of the openings 4 and 5 can also be implemented using other than circular arc-shaped boundary lines.

The side of the regulating wheel 1 facing away from the viewer is polished to a high quality in a known manner and is located in the installed state on an appropriately treated area a second, non-rotatable control disk 6, hereinafter referred to as the fixed disk.

The fixed disk 6 is shown in FIG. 2 in plan view. It contains in the illustrated embodiment four passage openings 7, 8, 9 and 10. The first passage opening 7 is again circular and concentric to the fixed disk 6. Two passage openings 9, 10 are essentially conventionally, i.e. designed as circular ring segments. So their width changes in the circumferential direction not. The passage opening 9 extends only over a relatively short angular range and is relative wide. The passage opening 10, on the other hand, extends over a very large angular range, is included but relatively narrow. The areas of the two passage openings 9, 10 are approximately the same size. the radially outer boundary lines of the passage openings 9, 10 lie on a common, concentric to the fixed disk 6 Circle.

The passage opening 8 is in turn sickle-shaped.

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forms. Its radially outer boundary line is an arc eccentric to the center of the fixed disk 6, while its radially inner boundary line is a circular arc concentric with the fixed disk 6. In contrast to the passage openings 4 and 5 of the regulating disk 1, the passage opening 8 of the fixed disk 6 becomes narrower in the clockwise direction.

The fixed disk 6 also has circumferential recesses 11 which engage positively in projections of a fitting or cartridge housing (not shown) to prevent rotation. The polished surface of the fixed disk 6 in FIG. 2 faces the viewer.

In FIGS. 3, 4a and 4b is the regulating wheel 1 of FIG Shown lying above the fixed disk 6 of FIG. 2, as these control disks 1, 6 are installed in a fitting will.

3 shows the closed position of the control disks 1, 6 or the valve. It is characterized by the fact that besides of course the circular, central ones Passages 3 and 7 - no passage 4, 5 of the regulating disk 1 overlaps with a passage opening 8, 9 or 10 of the fixed disk 6. Despite the proportionate large angular extent of the individual openings, this is possible because the sickle-shaped shape the radial dimension of the control disks 1, 6 is also opened up. So the narrower end of the "submerges" Regulating disc passage opening 5 the fixed disc passage opening 10; the narrower end of the fixed disk passage opening 8 "submerges" the narrower end of the Regulating pulley passage opening 4. From Fig. 3 it becomes clear

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borrowed / that the sum of the various passage openings included angle significantly exceeds 360 °. This would not be possible without overlapping if only the azimuthal, that is, dimension of the control disks 1, 6 pointing in the circumferential direction is utilized.

The further description is now made taking into account the special area of application for which the illustrated Control disks 1, 6 are intended: for a low-pressure safety mixer tap.

For this purpose, the fixed disk is in a cartridge or fitting housing used that the following communications exist: the central opening 7 of the fixed disk 6 is with the hot water pipe coming from the low pressure storage tank. It also communicates via the head office Opening 3 of the regulating wheel 1 with the outlet of the fitting. The opening 9 also communicates with the valve outlet, preferably by being connected to the central fixed disk opening 7 is connected via a recess in the housing base on which the fixed disk 6 rests.

The fixed disk passage opening 10 is connected to a line in connection, via which cold water is supplied to the low-pressure storage device. The fixed disk passage opening Finally, 9 is connected to the cold water supply line (house line).

The relationships with the regulating wheel 1 are as follows: the passage openings 4, 5 are directly connected to one another, for example by a corresponding recess in a plastic guide part, which is on the regulating wheel 1 is placed with the interposition of seals, in the circumferential recesses 2 of the regulating wheel 1 engages positively and on the society

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is attached, via which the regulating wheel 1 is rotated. It has already been pointed out above that the regulating wheel passage opening 3 on the one hand with the valve outlet and on the other hand via the fixed disk passage opening 7 communicates with the hot water side of the low-pressure storage device.

From FIGS. 3, 4a and 4b the following dimensional relationships can also be recognized:

The radially inner boundary line of the regulating wheel passage opening 5 lies with the radially inner boundary line of the passage opening 8 of the fixed disk 6 on one common circle concentric to the control disks 1, 6.

The radially outer boundary line of the regulating wheel passage opening is also located 4 with the radially outer boundary line of the fixed disk passage opening 9 on one common circle concentric to the control disks 1, 6. The maximum width of the regulating wheel opening 5 corresponds to the maximum width of the fixed disk passage opening 8. The maximum width of the regulating wheel passage opening 4 corresponds to the (constant) width of the fixed disk passage opening 9. The width of the fixed disc passage opening Finally, 10 is approximately equal to the minimum width of the regulating wheel passage opening

The function of the control disks 1, 6 described, built into a low-pressure safety mixer fitting as described, is as follows:
30th

Fig. 3 shows, as already mentioned above, the closed position of the valve. Apart from the central openings 3, 7, there is no overlap between openings in regulating disk 1 and openings in fixed disk 6. In particular is the one communicating with the cold water supply line

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rende fixed disk passage opening 8 from the regulating disk 1 covered.

If you now turn the regulating disc 1 from the position shown in Fig. 1 in relation to the fixed disc 6 in a clockwise direction, so the regulating disk passage opening 5 begins to overlap the fixed disk passage opening 8. Simultaneously the regulating disc passage opening 4 begins to overlap the fixed disc passage opening 9. this has with the result that cold water from the fixed disk passage opening 8 into the regulating disk passage opening 5 and due to the communication with the regulating wheel opening 4 crosses over to the latter and into the fixed disk passage opening 9 is incorporated. Since this, as mentioned above, is connected to the outlet of the fitting cold water flows out of the tap. If the regulating wheel 1 is turned further clockwise, the Opening cross-sections expanded. The amount of cold water flowing out increases until the position shown in FIG. 4a is reached. This is where the maximum amount of cold water flows.

If the regulating disk 1 is now rotated further in a clockwise direction relative to the fixed disk 6, the opening of the regulating disk begins 4 also to overlap the fixed disk opening 10. This means that cold water now also through the fixed disk passage opening 10 can flow, from where, as mentioned above, it reaches the low-pressure storage device. there it presses out an equivalent amount of hot water, which in turn passes through the openings 3, 7 of the control disks 1, 6 flows to the outlet of the valve. In doing so, it continues to mix with the (initially) via the fixed disk through-opening 9 running cold water: mixed water comes out of the fitting.

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From the consideration of Fig. 4b it becomes clear: to the same extent that when the regulating wheel 1 rotates, the one Fixed disk opening 10 is released, the other Fixed disk opening 9 closed. The opening 9 is initially closed by the fact that the width of the regulating disk passage opening 9 moving past smaller will. The effect is that after full opening of the cold water flow a further rotation of the regulating wheel 1 does not change the amount, but the temperature of the out of the armatures outflowing water causes. The end position is reached when the fixed disk passage opening 9 through the regulating disc 1 is completely covered and the fixed disc passage opening 10 is completely released through the regulating disk passage opening 4: now pure flows Hot water.

If desired, despite the irregular shape of the various passage openings in the control disks 1, 6 a linear characteristic can be achieved. This means that on the one hand when the cold water path is opened the same angular rotations of the regulating wheel 1 lead to the same quantity changes and that on the other hand in the mixed water area the same angular rotations of the regulating wheel 1 lead to the same changes in the mixing ratio, the amount of water remaining constant.

The following should be noted: the irregular shape of the fixed disk passage opening 8 and the regulating disk passage opening 5 is irrelevant for the characteristics of the valve, as there is no decisive volume restriction here takes place.

The cold water opening behavior is determined by the overlap the passage openings 9 and 4 determined. As can be seen from FIG. 4a, the regulating disk passage opening has a sickle shape 4 over the angular extent of the fixed

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disc passage opening 9 away practically negligible. It is therefore not necessary - which would be possible in and of itself - the radially inner boundary line of the Regulating disc passage opening 4 in the area in which it overlaps the fixed disc passage opening 9 in FIG. 4a, to run parallel to the radially outer boundary line. This would give an exactly linear characteristic.

The hot water opening behavior is determined by the overlap the openings 6 and 10 are determined. Due to the regular shape of the fixed disk opening 10, the irregular The shape of the regulating disk passage opening 4 is evident not matter.

From the above description it can be seen: through the development the radial dimension of the control disks are angular extensions of the passage openings in one size possible that would otherwise not be feasible. However, large angular extensions mean a large control path. This is mainly This is particularly important when setting the mixing ratio, as this enables the choice of the individually pleasant ones Temperature is relieved. The "sickle-shaped" design of the passage openings also makes flow cross-sections possible, which could not be achieved with the same disk radius using conventional technology.

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Claims (14)

841 / UO / r - / - 10/30/79 Claims Γ " M. J Safety mixer for low pressure accumulator with a) a fixed control disc (fixed disc) with a first passage opening, which with a Communicates cold water inlet channel; with a second passage opening, which with one to the outlet leading channel communicates; with a third passage opening, which with one to the low-pressure accumulator leading channel communicates; b) one lying on the fixed disk, opposite this rotatable second control disk (regulating disk) with at least two passage openings; c) a device which creates a watertight connection between two passage openings of the regulating disk manufactures; the first passage opening of the regulating disk at least the first opening in all open positions of the valve the fixed disk at least partially overlaps and the second opening of the regulating disk when rotating in the opening direction first progressively releases the second opening of the fixed disk and then, with further rotation in the same direction, the second opening closes to the same extent, according to patent (Patent application P 29 12 909.7), characterized in that two passage openings (4, 5) of the regulating disc (1) one in the circumferential direction (azimuthally) have boundary lines whose radial distance from the center of the control disks (1, 6) varies ("sickle-shaped" openings) and that the sum of the through openings (4, 5, 8, 9, 10) of the two control disks enclosed Angle is greater than 360 °. 2. Safety mixer tap according to claim 1, characterized in that that in addition the first passage opening (8) of the fixed disk (6) is sickle-shaped. 130023/0125 - 2 - ORIGINAL INSPECTED 841 / UO / r - 2 - 10/30/79 2947229 3. Safety mixer tap according to claim 2, characterized in that that the second (9) and the third (10) Passage opening of the fixed disk (6) have the shape of circular ring segments in a known manner. 5 4. Safety mixer tap according to claim 3, characterized in that that the azimuthal extent of the second passage opening (9) of the fixed disk (6) is compared with the azimuthal extension of the third passage opening (10) of the fixed disk (6) is relatively small. 5. Safety mixer tap according to claim 4, characterized in that that the area of the second passage opening (9) is equal to the area of the third passage opening (10) is. 6. Safety mixer tap according to claim 4 or 5, characterized in that the maximum width of the second passage opening (4) of the regulating disc (1) the same the width of the second passage opening (9) of the fixed disk (6). 7. Safety mixer tap according to one of claims 4 to 6, characterized in that the minimum width the second passage opening (4) of the regulating disc (1) is equal to the width of the third passage opening (10) of the fixed disk (6). 8. Safety mixer tap according to one of claims 1 to 7, characterized in that at least part of the sickle-shaped passage openings (5, 8) has a circumferential (azimuthal) boundary line which is a circular arc concentric _{to the center of the control discs (1 f 6)} , while the other azimuthal boundary line a to the center of the control discs (1,6) 130023/0125 841 / UO / r - 3 - 10/30/79 eccentric arc. 9. Safety mixer tap according to claim 8, characterized in that the radially inner, azimuthal boundary line of the first passage opening (8) of the fixed disc (6) and the radially inner azimuthal boundary line of the first passage opening (5) of the regulating disc (1) to the control discs (1, 6) are concentric circular arcs with the same radius.
10 10. Safety mixer tap according to claim 9, characterized in that that the maximum width of the first The passage opening (8) of the fixed disc (6) is equal to the maximum width of the first passage opening (5) of the regulating disc (1) is. 11. Safety mixer tap according to one of claims 8 to 10, characterized in that the radially outer The boundary line of the second passage opening (4) of the regulating disk (1) is an arc concentric to the center of the control disks (1, 6), the radius of which is the radius of the radially outer boundary line of the second (9) and the third (10) passage opening of the fixed disk ( 6) matches.
25th 12. Safety mixer tap according to claim 11, characterized in that that the radially inner boundary line of the two passage openings (4) of the regulating disc (1) so is performed that the area covered by it of the second passage opening (9) of the fixed disk (6) is equal to the released Area of the third passage opening (10) of the Fixed disc (6) is. 13. Safety mixer tap according to one of claims 1 to 12, characterized in that the two sickle 130023/0125 841 / UO / r - 4 - 10/30/79 shaped passage openings (4, 5) of the regulating disc (1) become wider in the same angular direction (e.g. clockwise). 14. Safety mixer tap according to claim 13, characterized in that that the first passage opening (8) of the fixed disc (6) in the opposite angular direction as the The passage openings (4, 5) of the regulating wheel (1) (e.g. counterclockwise) become wider. 10 130023/0125