DE2354662B2 - Signal device for water decalcifying agents, in particular for dishwashers - Google Patents

Description

The invention relates to water decalcifying agents on ■ ' Resin base with ion exchange, especially for dishwashers.

It is known that the η in the Wasserentkalkei ion exchange resins used must be periodically regenerated by salt water is passed between the grains a <<current. For this purpose, the decalcifying agents are connected to a container, κη a metered amount of salt is added periodically in order to achieve a suitable salt solution through the action of the water flowing through the container, which is used to regenerate the resins. For reasons of space, the capacity of the container is such that only a limited number of regeneration cycles is possible. It is clear that the concentration of the salt solution depends directly on the amount of salt in the container. until a value is reached below which the salt solution no longer regenerates.

Accordingly, it has become necessary to provide the decalcifying agents <· ■> with means that indicate the depletion of the salt or the concentration value of the salt solution, in order to avoid the risk of resins not being regenerated. Normally a float of such dimensions and weight is used that it swims as long as the concentration value is above a critical value; if the concentration drops below this, the float will sink to the bottom of the container. ^;

In order to know the concentration level, the swimmer must be observed accordingly can. As in dishwashers, the descaler or at least the salt container below the washing tub and is accessible via a threaded cover that can protrude from the aforementioned floor The observation can be made possible by the fact that the cover is transparent or a movable pointer which is displaced by the movement of the swimmer. In any case, observation can only done when the machine is empty and it is not always convenient, as there are spray devices, baskets or the like.

The object of the invention is to eliminate the disadvantages and to create a signaling device which Exceeding the limit value of the concentration of the saline solution indicates that urgent action should be taken cause.

Another object of the invention is to create a signaling device of the aforementioned type in FIG simple design and easy to assemble as well as safe and permanent functionality.

Another object of the invention is to provide signaling apparatus of the type mentioned above Installation does not require any major changes to the descaler or at least to the salt container

The object is achieved by a device according to claim 1

The main feature of the signaling device according to the invention is that a float is vertical in the Container for water is performed and has a permanent magnet and that a reed switch that is on magnetic attraction reacts, lies outside the salt container in such a position that a cooperation with the magnet is possible when it is at the lower end of its possible stroke has arrived after the critical value of the saline solution has been reached, which means that a Outside control lamp, which is attached so that it is easily visible, causes.

Further features and advantages essential to the invention emerge from the subclaims and from The following description, in which exemplary embodiments are explained with reference to the drawings will.

Time in the drawings

F i g. Fig. 1 is a partial sectional view of a dishwasher descaler with a display device according to the invention,

2 shows a partial axial section along the line H-II the fig. 1,

F i g. 3 shows a schematic front view of a special feature of the device, and

F i g. 4 is a partial sectional view similar to FIG. 2 with a variant.

With 1 a decalcifier is indicated, which consists in a known manner of one piece, the one contains cylindrical container 2 for salt for the purpose of forming the salt solution which provides for the regeneration and with an appendix 3 with a plurality of vertical columns in which the ion exchange resins are housed. The salt container 2 is with a sleeve 4 on the bottom 5 of the washing tub of the dishwasher connected and is provided with a threaded cover 6, which allows refilling of salt.

In the inner cavity of the container 2 is a vertical

tubular guide 7 attached, the gradations has, which allows insertion into vertical protrusions 9, which with the inner surface of the container are firmly connected. This guide has a plurality of calibrated openings 8 functioning as filters on. which are capable of retaining oversized grains, the cavity being in hydraulic communication with the main cavity of the container

A float 10 is arranged inside this guide, which moves vertically under the action of Can shift the load-bearing capacity that he receives from the salt solution as long as the salt concentration value does not reaches the critical area below which regeneration is no longer possible Concentration reaches the aforementioned threshold value, the float is no longer carried by the solution and sinks to the bottom of the container, where he comes to rest on an upper stand 12 on the ground. The float 10 contains a permanent magnet 11, which is preferably arranged on the lower wall

It is important to precisely calibrate the weight of the swimmer in relation to its volume in order to function safe to design, since the shift only depends on the change in density of the salt solution as a function of the Dilution of the same is effected.

The permanent magnet 11 acts with a reed switch 15 together, whose electrical contacts 16,17 thin, magnetically sensitive tongues exist. This switch has a housing 13 that extends outside the iu The container is inserted at the corresponding protrusions 14 The housing is provided with contacts, which are connected by means of conductors to a control lamp 16, which, for example, on the Dashboard of the dishwasher in a well t. visible location

When the concentration of the saline solution is normal or

is in any case above the limit value is located the float in a raised position, as shown in dashed lines in FIG. 2 and the indicator lamp is off. If the concentration of the saline solution falls below the limit value, the float descends and bends on the floor as shown in solid line in FIG. 2 specified. Under these conditions the position of the permanent magnet 11 is such that the closing of the spring tongues 16 and 17 of the reed switch is effected and with it the lighting up of the control lamp 18, which indicates that salt is in the container 2 must be refilled

The control lamp can work continuously or intermittently or alternatively can be with one acoustic signal generator to clarify the situation.

Ik Fig.4 is shown a constructive variant in which the reed switch 15 is pushed into a tubular housing 20 from below into a Groove 19 can be inserted, which is recessed at the bottom of the container 2 The aforementioned Space must of course be separated from the space of the container 3 in order to avoid any contact between the Switch and avoid the saline solution. The tubular container 20 can be characterized by a clamp elastomeric material 21, which is supported by a support 22 which is attached to the bottom of the The container is fastened by means of a screw 23. The aforementioned casing is made with electrical contacts be provided, which are suitable to be connected to the conductors for the purpose of supplying the control lamp will.

It is important that all parts near the switch or magnet be made from non-magnetic materials exist and that the switch does not exert an attraction suitable for the swimmer to ascend after refilling with salt to prevent.

For this purpose 2 sheets of drawings

Claims (4)

Patent claims: 1. Signal device for water limers, in particular for dishwashers of the type in addition to the columns carrying the ion exchange resins, a container containing the salt to form the resin regeneration solution, characterized by a float (10), which can be moved vertically in a guide in the container (2) for the salt, and a permanent magnet (11) and a reed switch (15) that reacts to magnetic attraction and outside the container for the salt in such a Position is appropriate that it can interact with the magnet of the float when the latter due to the reaching of a critical value of the concentration of the salt solution in its lower End position has moved, then the commissioning an outside control lamp (18) is effected, which is attached in an easily visible position 2. Apparatus according to claim 1, characterized in that the reed switch (15) in a tubular Housing (20) is pushed into a groove (19) on the bottom of the salt container is inserted. 3. Apparatus according to claim 1, characterized in that the reed switch (15) on one Housing (13) rests, which can be fastened by snapping into place outside of the salt container. 4. Apparatus according to claim 1, characterized in that the float (10) in one Vertical guide (7) is housed, which engages on the inner wall of the salt container (2) and as Has filter acting calibration openings (8).