DE3106604A1 - Device for preventing losses of washing agent in washing machines and dishwashers - Google Patents

Abstract

The invention relates to a flow-off closure device, especially for large domestic appliances, such as washing machines and dishwashers, the flow-off being closed by means of a floatable body. The object of the invention is, at the least possible outlay and without any mutual influence of the programme cycle, existing feed systems and flow-off shut-off devices, as regards all commercially available washing and care agents to prevent losses during feeding into the tub and to guarantee the prescribed lye concentration. This is achieved, according to the invention, in that a floatable body can move in a guide with two degrees of freedom, the opening and closing of the tub orifice being guaranteed by the suction generated when the lye pump is put into operation and, on the other hand, by the buoyancy of the floatable body during the inflow of fresh water into the tub. <IMAGE>

Description

Device to prevent detergent loss

in washing machines and dishwashers The invention relates to a Flow closure device, in particular for large household appliances, such as washing machines and dishwasher, the drain being closed by a float.

Conventional solutions of the flow systems have the disadvantage that no suitable detergents and care products have been flushed into the eye container Einricktungen are available to the occurring losses of solid or liquid Exclude detergents and pesticides. This means a reduction in the concentration of wash liquor and thus a deterioration in the washing results.

All known designs have the disadvantage that additional connecting lines between the container and the drain pump. (DE-OS 2 229 505; DE-OS 2 655 556) These solutions contain additional sealing points and require a higher one Manufacturing effort.

Another disadvantage is that the washing or

Care products to a percentage due to the design in the drainage system can reach unhindered and after rinsing in the water The aforementioned connecting lines aim to flush back into the container.

Furthermore, a solution is known in which the axial play of the lye pump rotor enlarged and the Punipenflügel is designed as a shut-off element. The closed position is realized through an external force. The disadvantage of this solution is that the tub drain and the pump inlet in line with a small distance must be in relation to each other in order to achieve a high reduction in ash and care product losses to achieve.

(DD-PS 142 902) The invention should be done with the least amount of effort and without any mutual influence of the program sequence or existing induction systems and a flow shut-off device for all commercially available washing and care products the losses when flushing into the suds container are excluded and the prescribed Caustic concentration can be guaranteed.

The otherwise necessary components are in their function to use, and not to use any additional mechanically operated components.

The invention is based on the object of creating a device with which a direct shut-off effect without influencing other assemblies, is achieved.

According to the invention this is achieved in that a buoyant Body can move in a guide in two degrees of freedom, opening and Closing of the suds container opening due to the resulting suction during commissioning the lye pump and on the other hand through the buoyancy of the scllvJiDmBähigen body is guaranteed when the fresh water enters the caustic pot.

The movement space of the swimmable body is designed in such a way that that the function of the same and the performance parameters of the subsequent components are not impaired in the drainage system Another feature of the invention is that the freedom of movement of the buoyant body to the following components of the drainage system is limited in the form of a protective device. For functional reliability This facility is important to ensure a constant self-cleaning effect is to achieve a safe and sufficient sealing effect on the tub.

According to the invention this is achieved in that the buoyant Body on its outer surface swirl-shaped depressions which it through set the water flowing past in rotation and thereby any foreign bodies adhering to it be rinsed off. The upper cover surface only has a sealing effect.

The invention will be explained below using an example.

They show: FIG. 1 a drain shut-off system; FIG. 2 a buoyant body Fig. 1 shows the schematic representation of the Abflußabsperrssystem with the buoyant Body 4.

The guide 2 is tightly connected to the eye container 1.

In the guide 2 is the buoyant body 4, which is limited downwards by the protective device 3.

The Laugenpunpe 5 is located under the protective device 30 Das A water that has reached the drainage system at the start of the flushing-in process fills the duct 2 so far that the capable body 4 as a result of its sprouting is pressed against the container drain 9 with the upper cover surface 7 and closes it. The undissolved that arrived at the container drain 9 in the further course of the flushing-in process Detergent can no longer get into the flow system and thus into the rest of the way Washing process get lost.

By reversing the drum 10 and heating it up, this becomes Detergent dissolved and is fully available for the rest of the ash process.

After the washing process has been completed, the eye pump is started up 5 the detergent solution is pumped out. As a result of the suction effect, the body capable of scbwia gives 4 the container drain 9 free, so that an unimpeded pumping out of the detergent solution the tub 1 can be done.

Due to the introduced into the lateral surface 5 of the buoyant body 4 The swirl-shaped depressions 8 become buoyant due to the flow of the washing liquor Body 4 is set in a rotary movement. This means that the jacket surface is self-cleaning 6 and the upper cover surface 7 guaranteed.

Reference symbols used 1 i, outer container 2 guide 3 protective device 4 buoyant body 5 drain pump 6 outer surface 7 upper cover surface 8 swirl-shaped Wells 9 container drain 10 drum

Claims (3)

Invention claims 1 device for preventing detergent losses in washing machines and dishwashers with an operationally filled with liquid Long containers in a swinging or rigid construction, which, in addition to the liquid, contain additives, in particular in solid and liquid form, characterized in that the Device is attached directly to the tub (1) and a buoyant Body (4) that can move in two freedoms; Jraden contains itself in one Guide (2) is located and is fluidically designed so that the closure and opening the container drain (9) without affecting the performance parameters subsequent components in the drainage system is guaranteed. 2. Device to prevent detergent loss in washing machines and dishwashers according to item 1, characterized in that the movement space of the buoyant body (4) has a limitation in the discharge direction, which at the same time is designed as a protective device (3) for the thawing pump (5). 3. Device to prevent detergent loss according to point 1 and 2, characterized in that the buoyant body (4) av. Its outer surface (6) has spiral-shaped depressions (8) and the upper cover surface (7) is rotationally symmetrical is trained.