DD256886B1 - METHOD AND DEVICE FOR PURIFYING TEXTILE MATERIAL IN WASHING MACHINES - Google Patents

Description

For this 1 page drawing

Field of application of the invention

The invention relates to a method and a device for rinsing textiles in washing machines for household and commercial purposes.

Characteristic of the known state of the art

There are known solutions for household washing machines, in which the rinsing process with 4 to 5 rinses is carried out partly in single rinses, partly in continuous rinsing.

In order to improve the rinsing effect, in most washing machines a short amount of spin occurs during rinsing.

It is also known that, often during the last rinse, laundry aftertreatment agents are added automatically or by hand. With these laundry aftertreatment agents, the washed laundry is again given the properties which have been wholly or partially lost during the washing process (eg softness, stiffness, anti-static finish of the laundry). Overlaps of the individual properties are possible.

In order to conserve water, it has been proposed to lower the level of the rinse and to change the number of rinses and the duration of the rinse. Although water can be saved with this proposed solution, the reduction rate that is possible is extremely small if a sufficient rinsing effect is ensured.

Furthermore, a solution is known in which the Spülbadanzahl is reduced by changing the wash liquor.

The disadvantage of this solution is that another laundry treatment must be performed in the home and in the trade. This results in greater expenses in production and in warehousing in the trade and in the household.

In DE-AS 2950929 a technical solution is described in which the degree of contamination of the rinsing liquor of a corresponding measuring device is detected at the end of each rinse cycle. If the rinsing liquor has a reasonable degree of contamination, the still programmed, intermediate rinses are run over by the program control device, and only the last rinse is carried out.

In this last rinse then the remaining pollution of the rinse water should be flushed out. However, this solution has the following disadvantages:

On the one hand, it may lead to the start of the rinsing process, even if the total rinse liquor is still relatively impure, because the measuring device has detected spatially amplified, early rinsing effects and on the other hand, the use of a relatively turbid rinsing or Wäschenachbehandlungsmittels pretend pollution, so that unjustified the rinsing process is continued, which may possibly lose the effect of the detergent.

Object of the invention

The aim of the invention is to save water during the flushing process.

This is realized by flushing in a detergent at a time when the rinse still contains a greater amount of alkaline ingredients. Furthermore, the wear of the laundry is significantly reduced by the use of a special detergent.

Explanation of the essence of the invention

The technical problem to be solved by the invention is to provide a method and a device, which make it possible to save water while flushing the textile material and the constant elimination of incrustation on the electric heater during the flushing process.

According to the invention the object is achieved in that the final rinse a detergent with neutralizing component such as citric acid, acetic acid, adipic acid, phosphoric acid and / or organic phosphoric acid is added and with the treated rinse the rinsing process until reaching a pH of 6, 5 to 8 is maintained.

The device according to the invention for carrying out the method is characterized in that an adding counter for the number of rinsing cycles integrated in the programmer and connected via electrical lines with a contact, wherein upon closing of the contact the activated in the counter number of rinsing cycles is reset by a rinse cycle.

embodiment

The inventive method and the device for carrying out the method will be explained in more detail with reference to an embodiment.

The device shown in Figure 1 consists of the programmer 1, which operates on the basis of an electromechanical or electronic principle of action, the counter 2, the contact 3, a container 4 for receiving and dosing of the detergent with neutralizing component. 5

In the drawing are further shown the supply line 6 for the detergent with neutralizing component 5 from the container 4 in the tub 7, the electric heater 8, the bearings 9 for the washing drum 10 and the Trommelantriebsrad 11 and the electric motor 12 with the electrical line 13 to the programmer 1.

About the programmer 1 with the counter 2, the electric motor 12 and thus the duration and the number of rinses is controlled. By means of the programmer 1, according to the input of laundry-related data, the counter 2 is activated so that a number of rinse cycles is predetermined.

In the embodiment described here is the first rinse 14, the second rinse 15, the third rinse 16 and the

4th rinse 17.

The flow of the entire rinse process is shown in the rinse process diagram 18.

When filling the container 4 with detergent with neutralizing component 5, the contact 3 is closed, the counter 2 is activated so that the predetermined number of rinses is reduced by a rinse. In this case, this is the rinse 4 position 17. The same happens also by means of the mounted in the container 4 signal generator 22nd

The signal generator 22 is connected by the electric cable 23 to the programmer 1. Furthermore, a pH sensor 20 is arranged in the tub 7. This pH sensor 20 is also connected to the programmer 1 via an electrical connection line 21. The pH sensor 20 constantly monitors the pH of the rinsing liquor. If a pH of the rinse liquor of 6.5 to 8 is reached, the rinse is stopped. However, if a pH of 6.5 to 8 is not reached after the third rinse 16, a further rinse is added via the programmer 1 and the counter 2.

The third rinse 16 contains the chemically active phase, and several successive, highly overlapping process steps are realized.

By adding the rinsing agent with the neutralizing component 5, for example in the third rinse 16, the alkaline components in the rinsing liquor and on the fiber are chemically inactivated and transferred to the rinsing bath. At the same time, the fibers are coated with the detergent ingredients, with the neutralizing component 5 acting as a catalyst.

Furthermore, the magnesium and calcium components 19 accumulating from hard water at the electric heater 8 are constantly released from the electric heater 8, so that the electric heater 8 remains metallically bright.

Another advantage is that is given by the neutralizing component 5 is a very good rinsability of all components of the fiber.

Documents considered:

DE-AS 2950929 (D 06 F, 33/00)

Claims (2)

1. A method for rinsing textile material in washing machines to reduce the water consumption during the rinsing process, characterized in that the last rinse a detergent with neutralizing component (5) is added and with the treated rinsing the rinsing process until reaching a pH of 6, 5 to 8 is maintained. 2. Device for rinsing textiles in washing machines, characterized in that an adding counter (2) for the Spülganganzahl in the programmer (1) is integrated and connected via electrical lines with a contact (3), wherein when closing the contact (3) the rinse cycle number activated in the counter (2) is reset.