DE1792488A1 - Device for displaying the consumption of the regeneration salt used to regenerate the ion exchange resin in water softening filters for household electrical appliances - Google Patents

Description

PATENT LAWYERS

DR.-ING. OF KREISLER DR-! NG. SCHÖNWALD DR.-ING. TH. MEYER DR. FUES DIPL-CHEM. ALEK VON KREISLER DIPL.-CHEM. CAROLA KELLER DR.-ING. KLDPSCH

September 6, 1968 Sch-DB / ls

ELETTRODOMESTICI SAN GIORGIO S.p.A., Via Privata Oto La Spezia, Italy

Device for displaying the consumption of the regeneration of the ion exchange resin in water softening filters regeneration salt used for household electrical appliances,

As is well known, it is extremely important in electrical household appliances, and in particular in dishwashers, to To have available softened water that has been freed from calcium and magnesium salts. This is usually the case achieved in that a filter is used which contains cationic exchange resins which periodically with an alkali chloride solution, especially sodium chloride solution, must be regenerated. The ones with an automatic Devices equipped with a regeneration device for the resins must have their own container in which Sodium chloride is introduced and dissolved in a certain operating phase of the device and

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exchange resin flows through it. In numerous cases it will here a container is used which contains a sufficient amount of salt for several regenerations, so that there is no need to refill salt after each work cycle. However, this has the disadvantage . that the salt supply in the container can run out without this being observed, so that the softening filter is ineffective and not in the household appliance Softened water flows in.

The invention makes it simple and economical Type allows to indicate that the regeneration salt consumed in the undissolved state and has already completely passed into solution, so that it is renewed must become. This is achieved according to the invention in that on the solid salt supply in the container a corresponding formed and guided element made of ferromagnetic material rests under its own weight, so that this element, once the salt is completely dissolved ", the bottom of the container from non-magnetic Material touches. Below the salt storage container there is a switch, the movable contact of which has a Permanent magnets. When the ferromagnetic element placed over the salt is on the bottom of the container rests, it attracts the permanent magnet, which closes the switch. The switch is up in an electrical circuit, with a power source and an optical or acoustic indicator that is closed when the Switch is energized and shows the consumption of the salt supply.

The invention is explained in more detail with reference to the drawing using an exemplary embodiment.

Water flows into the container 1 through an inlet A

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and through an outlet B. There is in the container Table salt S-, which can be introduced through an opening that can be closed by a cover 2. On the cap 2, a rod J5 is mounted on the inside, on which an element 4 made of magnetic material slide can. After pouring the salt into the container

this is closed by the cover, the rod 3 penetrating into the salt layer, while the element 4 remains on the salt layer, as indicated by the position labeled ^{4 f.} The free end of the rod 3 has a stop by which the displacement of the element 4 is limited. If undissolved salt is contained in the container, element A occupies position 4 ', since it cannot penetrate the salt layer because of its shape. If the salt is completely dissolved, the element 4 reaches the bottom of the container 1 due to its own weight, transferring a permanent magnet 5 attached to the movable contact of a switch 6 from its rest position 5 ¹ to a raised position. In this way, the switch 6 closes the Circuit with power source 7 and display element 8..

M98467 U53

Claims (4)

V / 324E8 claims 1. Device for displaying the consumption of the used to regenerate the ion exchange resin Regeneration salt in water softening filters for electrical household appliances with a storage container for sufficient for several regenerations Amount of regeneration salt, characterized by one below the off non-magnetic material produced bottom of the container (1) arranged, movable switching contact a. (5) in an electrical indicator circuit and through a counter-element (4) resting on the surface of the salt in the container, at least one of which of these interacting elements (5, 4) is magnetic and the other consists of a material which is attracted by the magnet. 2. Device according to claim 1, characterized in that that one element (4) consists of a ferromagnetic material and the Switching contact (5) has a permanent magnet. J5. Device according to claim 1 or 2, since d u r c h £ marked that on the salt EUsnent (4) lying lengthways inside the container a vertical rod (j5) is freely movable. 4. Apparatus according to claim 1 or 2, characterized in that the on the surface of the salt within the container resting element (4) attached to the lid (2) of the container hanging is. 109846 / U S3