DE2757930A1 - Dish washer operation accelerating soln. of cleaning agents - permits usage of cheaper salts normally dissolving more slowly - Google Patents

Abstract

The cleaning agent stock tank of a dish washing machine is modified so that the washing agent contg active chlorine and polyphosphates is dissolved more easily. A sieve is fitted, the mesh of which is so small that the washing agent in the solid state cannot pass through, and the water level is maintained above that of the chemical mixt. Beneath the sieve an inclined plate with passages at the top and bottom edges stimulates circulation of the water, and the soln. of the chemical agent for dosage into the washing water. Caking of the chemicals at the bottom of the stock tank is not only prevented, but the improved speed of soln. makes it possible to use cheaper sodium instead of potassium salts.

Description

Method for the masehinellerl S4? Oiling of dishes

Subject of the patent. . . (Patent application P 27 46 843.5) is a method for machine washing of dishes with the addition of an active chlorine and polyphosphate cleaning agents in liquid form, in which solid, A detergent mixture consisting essentially of potassium salts in one for several A sufficient amount of rinsing cycles in one used in or near the dishwasher Bring storage container and dissolve in water or the corresponding freshly made The detergent solution fills the storage tank and the rinsing water each a partial amount metered in.

It is important that the detergent mixture is high and fast Has solubility in water, otherwise the product may clump together can occur at the bottom of the dissolving tank and then only the further dissolution done very slowly. Because of the better solubility are therefore essentially Cleaning mixtures consisting of potassium salts are used. Is disadvantageous however, the relatively high price of potassium salts.

In a further development of the process it was found that one also Detergent mixtures made of the more slowly soluble sodium salts or mixtures of sodium and potassium salts can use when in the storage container The mesh size of the sieve is such that the solid detergent mixture cannot pass through the sieve can pass and the sieve should be at a height that the on The solid detergent mixture lying on the sieve is just completely covered by the water is.

According to the invention, an intensive exchange of concentration takes place here between the solution below the sieve and the powder, so there the product is completely dissolved and no lumps are left behind.

In another embodiment, the screen can be movable. on in this way one achieves an acceleration of the dissolution process.

The loosening is also accelerated when in the storage vessel (Dissolving vessel) below the sieve a sloping channel is attached so that the concentrated cleaning solution hitting the gutter from above against the floor of the vessel is diverted and through the passages a and b of Figure 3 a Cycle of solution comes about.

According to the invention, all cleaners, regardless of whether they are sodium salts, Potassium salts or mixtures of alkali salts are used. So is it is possible, for example, to use sodium salts such as polymeric phosphates e.g. sodium trimetaphosphate, Sodium tripolyphosphate or polymeric phosphates, according to the German patent specification 938 423 are manufactured, sodium silicates such as sodium trimetasilicate or their Hydrates to be used as cleaning components. In all cases a residue-free fast resolution achieved.

It is advantageous to proceed in such a way that one goes into the storage container first fills in the water, with the water standing above the built-in sieve. That Solid detergent mixture is then poured into the container above the sieve.

The close-meshed sieve holds back the detergent that has not yet been dissolved. Through the exchange of concentration between the solution below the sieve and the Powder dissolves quickly.

But you can also first put the solid detergent mixture into the storage container fill with the built-in sieve and add enough water until the sieve with the The cleaning agent lying on it is completely surrounded by water.

Example 1 In a container with a built-in sieve (Fig. 1) Filled in 2520 ml of tap water (180C). The water stood above the built-in Sieves. A mixture of 780 was then poured in above the sieve g sodium metasilicate pentahydrate (260 g / l), 555 g sodium hexametaphosphate (185 g / l) and 25.5 g potassium dichloroisocyanurate (8.5 g / l). The cleaning mixture lying on the sieve was just covered with water. The container was not shaken. The resolution was complete after a period of 3 hours.

Comparative example: In a container that did not have a built-in sieve, the same amount of water and solid detergent mixture was added as in Example 1. The dissolution was not yet complete after 24 hours.

Example 2: In a container with a movable sieve (Fig. 2) the cleaning solution described in Example 1 prepared. By appearing five times and moving the sieve away, the solid detergent mixture was dissolved in about 1/4 hour.

Example 3: The cleaning solution described in Example 1 was how described there, in a container with a built-in sieve and a sloping channel below the sieve (Fig. 3). The container was not shaken. The cleaning agent mixture was completely dissolved in 1 1/2 hours.

Claims (3)

Claims: Method for the machine washing of dishes under Adding a detergent containing active chlorine and polyphosphate in liquid Form in which the solid detergent mixture is used in one that is sufficient for several wash cycles Amount in a storage container in or on the dishwasher dissolves in water: and a partial amount is added to the rinse water, according to the patent .. ... (Patentanir # ld # lng P 27 46 843.5>, characterized in that in the Reservoir a sieve such mesh size is available that the solid detergent mixture cannot pass through the sieve and the sieve must be at such a height should that the solid detergent mixture lying on the sieve with water is just perfect is covered. 2. The method according to claim 1, characterized in that the storage container contains a movable sieve. 3. The method according to claim 1, characterized in that the storage container contains a sieve, under which there is a crooked groove.