SK29296A3 - Outlet valve of the rinsing tank - Google Patents

Abstract

Outlet valve in which the side wall (3) has a venting opening (10) arranged at a distance from the cover wall (8) determined by the volume of air. An apron (11) is fitted below the venting opening on the side wall. The venting opening is so dimensioned that after a large flushing action the air in the float (7) can escape during the period of filling-up to the venting opening (10). With a short time closure of the outlet valve during a small flushing action no air escapes via the venting opening.

Description

Flush cistern drain valve

Area, techniques

BACKGROUND OF THE INVENTION The invention relates to a flushing cistern outlet, in particular a toilet flushing cistern, with a flush-mounted housing at the bottom of the flushing cistern, in which a float with a downwardly open air chamber is provided. cabinets can be lifted.

BACKGROUND OF THE INVENTION

Drain valves of this kind have long been known. Float buoyancy after flushing is provided by the air present in the float air chamber. These drain valves can be designed so that premature flushing is possible. Drain valves are also known which allow for so-called two-stage flushing. When the button is operated, the flushing tank is automatically drained. When actuating the second button, only part of the flushing water contained in the flushing tank, for example 6 liters, is also released automatically. Practice has shown that such two-stage flushing, with a specified amount of flushing water, is superior to the flushing interruption specified by the user. In two-stage flushing, optimum flushing water savings are possible when the flushing water quantity is always exactly the same for a small flushing.

SUMMARY OF THE INVENTION

The inventor has found that with little research

- Flushing and when using drain valves of this kind, air can escape from the float and, as a result, water can enter the float underneath. Therefore, the buoyancy of the float and hence the amount of flushing water can change uncontrollably. As a result, too little or too little water is released with a small flush. The inventor has therefore set himself the task of providing a drain valve of the kind mentioned, which works more precisely in the small flushing process and which is therefore not substantially more complex and expensive to manufacture.

The problem is achieved in a drain valve of this kind in that the side wall of the air chamber has at least one venting opening at a distance determined by the air volume from the cover wall. The solution is surprisingly simple, but nevertheless functionally safe. In the drain valve according to the invention, after each flushing, the float is filled with water from the bottom up to the air vents. The water level in the float and thus the volume of the air chamber are always precisely determined. As a result, the same buoyancy of the float always occurs. For example, the vent hole may be through a small bore, thereby avoiding the need for appropriate mention. A layer of water in the float below the air vent prevents air from escaping from the float with a small flush.

Further advantageous features are apparent from the dependent claims, the following description and the drawing.

Overview of the figures in the drawing

An exemplary embodiment of the invention will be explained in more detail by a single figure showing, in a schematic representation, a cross-section of a drain valve according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

The drain valve 5 is mounted in a known manner in the flush tank 1 above the outlet opening 3 in the bottom 2 of the flush tank. In the valve housing 6, the valve tube 4 with the float 2 is fixedly lifted above it. In the shown position, the opening 3 is closed by the valve plate 13 of the valve tube 4. If the valve tube 4 is lifted by a conventional control device 14, the opening 3 and flushing water 17 through the windows 11 of the cabinet 6 flows through the opening 3 into a toilet bowl (not shown). The valve tube 4 is held in the housing 6 by buoyancy of the air chamber 16 until the required amount of flushing water is discharged.

To release a small amount of flushing water, a closing weight 15 is disposed on the valve tube 4 in a known manner, which, in the case of a small flush, loads the valve tube 4 and moves it prematurely to the closed position. In such a small flushing, the water level A of the fully filled flushing tank is lowered up to the level B. After a small flushing, the residual amount of water, for example 3 liters, remains in the flushing tank. In the case of large flushing of soles, the valve tube 4 does not burden the closing weight 15 and therefore remains raised until the flushing cistern 1 is completely emptied.

The float 2 has the shape of an inverted cup and has a cover wall

8. and approximately cylindrical side wall j). In the lower region of the side wall, one or more vent holes 10 are arranged at a distance from the cover wall 5. These holes 10 are small in comparison and preferably have a diameter of several millimeters, for example two millimeters. The apertures 10 may also be in the form of narrow slots, or may have other shapes. As shown in the figure, the float 2 also has a cylindrical apron 11 below the vent holes 10. This extends to the lower edge 12 which defines the lower opening

-4boat 7.

In the rest position, there is a plurality of water 18 in the float 11, the level of which C is determined by the air vents 10. The apron 11 is sized such that air cannot be drawn from the float chamber 16 in a small flush. Exact values can be readily determined by practical experiments.

The air vents 10 are sized so that air cannot escape from them during a short flush during a small flush. This is guaranteed for bores with a diameter of, for example, 2 to 5 mm. The air vents 10 must be at least large enough that, in the case of large flushing, air from the apron region 11 can escape through the apertures 10 and water 18 can enter the float 7 from the bottom.

Claims (5)

PATENT CLAIMS 1. A flushing cistern outlet valve, in particular a flush cistern having an air chamber. toilet tanks, with a bottom-mounted cabinet, a float with a downwardly open float which is arranged on a closing body liftable in the cabinet and has a cover wall and a side wall, characterized in that the side wall (9) is spaced apart from the side wall (8), determined by the volume of air, at least one air vent (10). Drain valve according to claim 1, characterized in that an apron (11) is arranged on the side wall (9) below the vent opening (10). Drain valve according to claim 1 or 2, characterized in that the venting opening (10) is sized such that, after a large flushing, air can escape substantially up to the opening (10) during the filling time of the flushing tank (1). float / 7 /. Drain valve according to one of Claims 1 to 3, characterized in that the vent opening (10) is sized such that substantially no air can escape from the opening (10) during short flushing of the drain valve (5). . Drain valve according to one of Claims 1 to 3, having means (15) for automatically interrupting the flushing. -66. Outlet valve according to one of the features, characterized in that it is cup-shaped. of claims 1 to 5, that the float (7) is Outlet valve according to one of Claims 1 to 6, characterized in that the venting openings (10) comprise several comparatively small openings.