DE102023201349B3 - Method for operating a washing machine and washing machine - Google Patents

Abstract

In a method for operating a washing machine, a defined level of moisture is required for items of laundry in the drum. This is brought about in a determinable manner by alternately moistening the laundry items in the drum from below and from above. In between, the laundry items can be mixed up or loosened up by turning the drum. By determining the total amount of water admitted into the washing machine and comparing it with the amount of water not absorbed by the laundry items, the amount of water absorbed by the laundry items can be determined. This is assumed to be evenly distributed within the laundry items, and so the moisture content or moisture level of the laundry items can be determined. This means that different subsequent washing processes can be carried out in a more defined and overall better manner.

Description

FIELD OF APPLICATION AND STATE OF TECHNOLOGY

The invention relates to a method for operating a washing machine and such a washing machine, the method primarily involving moistening items of laundry in the washing machine with water in a controlled manner and to the desired extent.

It's from the DE 10 2020 213 968 B3 It is known to moisten laundry in a washing machine with water not via a partially filled drum container, as is usual in the prior art, but to apply water from above into the drum and onto the laundry items. This means the water can be applied more directly to the laundry items. Overall, less water is required because the drum container around the drum does not have to be filled to a certain level so that the laundry items can absorb water from below, so to speak. This washing machine includes an outlet from the drum container that can be filled with water, which can be closed using a drain valve, as well as elements of a water supply and a washing machine control, which is connected to the power supply for the drive motor and to the valves and the pump for controlling them.

From the DE 10 2021 207 441 B3 a method for operating a washing machine according to the characteristics is known, in which a dry weight of laundry items in the drum is recorded. To moisten the laundry, with the drain valve open, water is introduced from above via the fresh water inlet through a metering valve into the drum container and into the drum with the laundry items in it, whereby the amount of water introduced via the fresh water inlet is known and the drum is rotated slowly. The water is also applied to the laundry items in the drum from above using an injection device, with the drain being opened by means of the drain valve.

In the DE 10 2015 108 951 A1 a method for operating a washing machine is specified, in which a weight of laundry items in the drum is recorded and an amount of fresh water determined based on the weight is introduced from above into the drum container and into the drum with the laundry items in it via a fresh water inlet. The drum is slowly rotated in a reversing phase. Water is then applied to the items of laundry in the drum from above using an injection device as a spray head including a flooding system, with the drain open and the drum rotating. This describes rotating the drum with the laundry items in it at a speed of up to 500 rpm, with this step determining the amount of water flowing through the drain. According to this teaching, the water supply via the injection device and the rotation of the drum are repeated until the required moisture level is reached and a washing process can begin. The presence of the required moisture is detected based on a predetermined amount of water expelled when the drum rotates.

The DE 10 2014 104 088 A1 specifies a method for operating a washing machine, in which certain amounts of water are applied to the laundry items in the drum from above at rotation speeds of 350 to 450 rpm via a fresh water inlet into the drum container and by means of an injection device as a reflow nozzle with the outlet open. A volume flow in the reflow device and thus also a volume flow of the water draining through the drain is determined in order to determine an amount of water that needs to be refilled if necessary. Parameters of a recirculation pump are used as a criterion for achieving the desired laundry moisture.

The DE 10 2016 212 490 A1 relates in particular to a method for operating a washing machine in which, in order to moisten the laundry, water is applied from above to the laundry items in the drum by means of an injection device as an inlet nozzle. The drum drain is open and the drum does not rotate.

TASK AND SOLUTION

The invention is based on the object of creating a method mentioned above for operating a washing machine and a washing machine suitable for this purpose, with which problems of the prior art can be solved and in particular it is possible to moisten laundry or laundry items with water easily and to make it practical and preferably to be able to carry it out in a precisely controllable manner.

This object is achieved by a method for operating a washing machine with the features of claim 1 and by a washing machine with the features of claim 15. Advantageous and preferred embodiments of the invention are the subject of the further claims and are explained in more detail below. Some of the features are only described for the process or only for the washing machine. However, regardless of this, they should be suitable for both such a procedure and such a washing machine machine for its implementation can apply independently and independently of each other. The wording of the claims is incorporated into the content of the description by express reference.

The washing machine for the invention has a drum container in which a drum for receiving laundry or items of laundry is rotatably arranged therein, a drive motor for the drum being provided for the rotation thereof. It has a power supply for the drive motor, preferably with power electronics or as an inverter. It has an injection device, either in the upper area of the drum container or near a door or in a door seal. The injection device is used to introduce or inject water into the drum from above. The drum container has a drain including a drain valve, preferably at the bottom. The drain can be closed by means of the drain valve in such a way that the drum container can be filled with water at least in a lower area. As is well known, moistening can be carried out from below.

The washing machine has a water supply with water pipes, valves, a fresh water inlet into the washing machine, a wastewater drain from the washing machine, a pump, the drum container, the drain from the drum container, sensors and the injection device. In addition, other facilities such as filters, water reservoirs or the like can be used. be provided. It also has a washing machine control that is connected to the power supply for the drive motor and to the valves and the pump to control them.

In the method according to the invention, the steps described below are carried out. First, in step A, a dry weight of laundry items in the drum is recorded, for example by means of a weighing device on the washing machine or on the drum or on the drum container. Alternatively, this can be done by rotating the drum with the laundry items in it and monitoring and evaluating a motor current of the drive motor. Furthermore, a laundry-water ratio is specified that should be achieved, i.e. a degree of moisture penetration of the laundry items, so to speak. This can preferably be specified by a washing program or washing process set on the washing machine by a user and can be dependent on the washing program, i.e. differ, for example, in terms of washing temperature and, above all, type of laundry, in particular in terms of fiber type.

In a following step B, with the drain valve open, water is introduced from below through the drain into the drum container and into the drum with the laundry items in it, preferably via the fresh water inlet, whereby the water pressure applied to the fresh water inlet is advantageously used or is sufficient for this. In this case, no water has to be pumped by the pump. A water level in the drum container or in the drum can be a few cm, advantageously less than 10 cm more than 2 cm, so that the lower items of laundry are in the water and are therefore moistened or can absorb water. The amount of water introduced via the fresh water inlet is recorded or is known, possibly in transit using a flow sensor or a volume flow sensor, alternatively by detecting a water level in the drum container or, for example, in the aforementioned filter. Then either after introducing water or during this, the drum is rotated slowly or in several steps, preferably rotated a total of exactly one revolution. This serves to ensure that other items of laundry or areas of laundry are repeatedly immersed in the water below and are thus moistened or moistened.

In a subsequent step C, water is applied to the laundry items in the drum from above, advantageously via the fresh water inlet or fresh water from outside, by means of the injection device. Since at least some of the items of laundry are damp, the laundry will at least partially collapse, so that a free space is created in the upper area of the drum, so the drum is no longer completely filled to the top, so to speak. In this upper area, the injection device can apply water to the laundry items. The drain from the drum container is closed by means of the drain valve and the drum is preferably not rotated. Here, the amount of water introduced via the injection device can be detected, advantageously in a similar way as described above by means of a flow sensor or a volume flow sensor on the fresh water inlet. By closing the drain, any water that may escape downwards from the laundry items remains in the drum container and can contribute to moistening the laundry items from below. According to one possibility, it can be provided that the water previously introduced into the drum container from below is drained and, for example, temporarily stored, preferably in the filter, which can be connected downstream of the drain valve. The two amounts of water can then be kept separate from each other.

In a subsequent step D, the drum with the laundry items in it is rotated by means of the drive motor, advantageously with a relatively low rotational speed or a rotational speed of 70 rpm to 100 rpm. This relatively low rotational speed should be selected such that even in the area of an axis of rotation Drum or exactly on the axis of rotation, i.e. in the middle area of the drum, items of laundry are present. It should therefore be avoided that, due to a higher or a relatively high rotational speed, the items of laundry largely rest against the inner wall of the drum and a free tunnel is formed around the axis of rotation without items of laundry in it. In this step D, the drain valve is advantageously open and the presence of water and the amount of water draining through the drain can be detected. Since the total amount of water put into the washing machine and onto the laundry items is known as described above, and it is now also known how much water has drained from the drum container, it can be determined by simply forming the difference how much water is in or from the laundry has been vacuumed up by the laundry items.

In a subsequent step E, the drum is again not rotated while water is applied to the laundry items from above using the injection device with the drain valve closed. The laundry items are then moistened again, again from above.

In a subsequent step F, the procedure is similar or even the same as in step D, in that the drum is rotated and the drain valve is opened in order to allow water to drain out of the drum container through the drain. The amount of water flowing or expired through the drain is again recorded, advantageously as described above.

In a subsequent step G, the total amounts of water applied to the drum and onto the laundry items or the total amount of fresh water let into the washing machine and the amounts of water drained through the drain are recorded and compared, in particular the amount of water last drained through the drain. This determines how much water has been absorbed by the laundry items in the drum or how much water is in the laundry items. The remaining fresh water that was let into the washing machine must then have drained out through the drain. This water can, for example, be collected in the aforementioned filter due to its large volume and then this amount of water can be determined. If the ratio of this amount of water absorbed by the laundry items to the weight of the laundry items contained in the drum does not yet correspond to the specified laundry-water ratio from step A mentioned at the beginning, water is again applied to the laundry items from above using the injection device. For this purpose, water that is still in the water supply can be used; alternatively, fresh water could also be supplied again. This can be repeated under certain circumstances until the specified laundry to water ratio has been reached.

In a subsequent step H, a predetermined washing process for the laundry items begins as soon as the ratio of the amount of water absorbed by the laundry items in the drum to the weight of the laundry items contained in the drum corresponds to the predetermined laundry-water ratio from step A corresponding to this washing process. The items of laundry then have the appropriate or specified moisture content for this washing process in accordance with the ratio mentioned.

In an embodiment of the invention, an amount of additive required for a washing process, in particular detergent, can be calculated based on the known amount of water present in the washing machine and the known water absorption of the laundry items, i.e. their moisture content. For this purpose, specifications of a set or selected washing program can be included for the washing process. In this way, a specified amount of additives can be achieved for a specified moisture penetration. This means that the washing process can be carried out as optimally as possible.

In a further embodiment of the invention, a time for adding the additives during the washing process, in particular the detergent, can be adjusted and thus optimized. This can also be based on the fact that the amount of water in the washing machine or in the drum and in the items of laundry therein as well as the weight of the items of laundry are known. In this way, the temporal effect of the additive can be optimized.

In an advantageous embodiment of the invention, the laundry items can be rearranged or mixed in accordance with step B between individual steps B to H. This is advantageously done by moving the drum according to step B. A particularly advantageous way of reversing the direction of rotation of the drum can be carried out here. Such a reversal of the direction of rotation of the drum can generally be provided in between in order to better loosen the laundry items and/or to distribute more evenly. A rotation speed can then be set as previously described.

In an embodiment of the invention, the amount of water introduced can be adjusted such that the weight of the laundry items is twice to five times as high as the weight of the water introduced. This can correspond to a specified laundry-water ratio of 2:1 to 5:1. In this range, items of laundry are considered to be damp, either with a high degree of moisture penetration close to a ratio of 2:1 or with a low degree of moisture penetration close to a ratio of 5:1.

In an embodiment of the invention, water can be introduced permanently and evenly into the drum container in step B, whereby the drum is either permanently moved or rotated in partial steps for a maximum of 0.5 seconds to 5 seconds after every 10 ° to 45 ° rotation of the drum stops. In particular, this occurs after every 20° to 35° rotation of the drum. By avoiding rapid rotation of the drum, the laundry items are mixed or rearranged without water being thrown out of them.

In a further embodiment of the invention, after step B and before step C, the drum can be rotated in the opposite direction to step B, i.e. the aforementioned reversal of the direction of rotation can take place. The drum is advantageously rotated slowly or in several steps as described above.

In a possible embodiment of the invention, water can be introduced into the washing machine as fresh water from outside in step C in addition to the water introduced in step B. Alternatively, you can only use water that has already been let into the washing machine from above to moisten the laundry items, but of course this is only possible if enough water has drained out of the drain.

In a further embodiment of the invention, it can advantageously be detected in step D by means of a tunnel sensor device whether there are items of laundry in the area of the rotation axis of the drum or exactly on the rotation axis. This should be avoided or in this case the rotation speed would have to be reduced somewhat, at least until there are items of laundry here again. An already mentioned rotation speed of 70 rpm to 100 rpm can meet this condition in many cases. The tunnel sensor device can advantageously be designed in such a way that it works optically. It can be particularly advantageously designed as a light barrier or reflex light barrier with a lighting direction along the axis of rotation or parallel to the axis of rotation. Alternatively, it can have a camera and be provided with or work with appropriate image processing.

In an advantageous further embodiment of the invention, in step D the drum can be rotated at a speed that is 5% to 50%, preferably 10% to 30%, below the speed at which an area of 3 cm around the axis of rotation of the drum is free of laundry items. This can ensure that the speed is below a speed at which a clear tunnel of laundry items already forms in the drum. It can be provided that the drum is rotated and the speed is increased until an area of 3 cm around the axis of rotation of the drum is free of laundry items and / or for a period of at least 3 seconds to 10 seconds items of laundry remain. This can be detected using the tunnel sensor device. Based on this, the speed can then be reduced again by 5% to 50% or by 10% to 30% as desired. If the area mentioned around the axis of rotation of the drum only remains free for a short time or for a few seconds until this has been recognized by the sensor device, and then by reducing the speed there are again items of laundry here, there is no negative effect.

In a further development of the invention, the drain valve can be opened in step D and/or step F, whereby the amount of water that then flows out of the drum container through the drain is determined. During this process, no water should be brought into the drum or onto the laundry, regardless of how it is drained. The amount of water flowing out through the drain can advantageously be detected using a correspondingly designed quantity sensor, for example as a capacitive or optical sensor. In one embodiment of the invention, the quantity sensor can be arranged on or in a filter downstream of the drain, through which the water flows behind the drain and is filtered. The quantity sensor can be a fill level sensor; several fill level sensors can advantageously be provided on or in the filter. These can preferably be capacitive sensors or turbidity sensors. The amount of water can be determined when a respective filling level is reached. Alternatively, a flow rate sensor can be provided, as is known from the prior art.

In step E mentioned, water present in the water supply can first be applied to the laundry items using the injection device. This can be done until a laundry-water ratio specified in step A has not yet been reached. Water can then be admitted to the fresh water inlet, whereby the water applied can be taken from the water supply or from a reservoir arranged in the water supply. It is important that the amounts of water are recorded and known, so that it is always known overall how much water has been let into the washing machine and how much water has not been absorbed by the laundry but is present separately, for example stored in the aforementioned filter . In this way, the difference can always be formed, which is then present in the laundry according to the laundry-water ratio. In order to achieve the specified laundry-water ratio, the motor current of the drive motor can generally also be monitored in order to determine the weight of the damp laundry items in the drum. If the weight of the dry items of laundry is known, in addition to the check, the weight and thus the amount of water in the items of laundry can be determined.

These and other features emerge not only from the claims but also from the description and the drawings, with the individual features being implemented individually or in groups in the form of subcombinations in one embodiment of the invention and in other areas and being advantageous and protectable on their own may represent versions for which protection is claimed here. The division of the application into individual sections and subheadings does not limit the general validity of the statements made under them.

BRIEF DESCRIPTION OF DRAWINGS

• 1 eine schematische Vorderansicht einer erfindungsgemäßen Waschmaschine,
• 2 einen Ablauf des Durchfeuchtens von Wäschestücken in der Waschmaschine aus 1 von unten,
• 3 einen Ablauf des Durchfeuchtens von Wäschestücken von oben,
• 4 ein Blockdiagramm, das eine Möglichkeit zur Durchführung des erfindungsgemäßen Verfahrens zeigt.

Further advantages and aspects of the invention result from the claims and from the description of exemplary embodiments of the invention, which are explained below with reference to the figures. Show:

• 1 a schematic front view of a washing machine according to the invention,
• 2 a process of moistening laundry items in the washing machine 1 from underneath,
• 3 a process for moistening laundry items from above,
• 4 a block diagram showing one way of carrying out the method according to the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The schematically illustrated washing machine 11 with a washing machine control 12 has a drum 13 including a drive motor 14. The drum 13 is, as usual, arranged in a drum container 15, also called a tub. Below, a drain 17 leads out of the drum container 15, which is followed by a drain valve V1. A filter 20 is arranged behind the drain valve V1, which advantageously has different filter stages and is particularly advantageously designed for coarse filtering and fine filtering. Appropriate filter sieves or similar. are arranged in a large housing of the filter 20. A fill level sensor 21 is schematically arranged on the filter 20; advantageously, there can be several fill level sensors that can detect different fill levels of the filter 20 and thus different amounts of water.

A water line 22a leads from the filter 20 to a pump 24 with a heater 25. Corresponding pumps are known as so-called engine heat pumps. A further water line 22b leads from the pump 24 to a supply valve V2, which is designed as a three-way valve. A water path leads to a wastewater drain 27 from the washing machine 11 to the outside in order to pump water out of the washing machine 11. Another water path leads by means of a supply line 29 to an injection device 31 at the top of the drum container 15. Such injection devices for washing machines are also known, in particular for so-called recirculation washing machines. The injection device 31 can be arranged, for example, near a door or a door seal. Under certain circumstances, it can be designed to be controllable or adjustable in its injection direction. Not shown but easy to imagine is an aforementioned tunnel sensor device, advantageously on or in the drum 13. It can also possibly be arranged near the door or near a door seal.

At the bottom left, a fresh water inlet 33 leads into the washing machine 11. A first flow sensor 34 is attached to its water pipe. This flow sensor 34 can detect the amount of water flowing through the pipe. This serves in addition or as an alternative to a measurement with the fill level sensor 21 to record the amount of water let into or present in the washing machine 11. A fresh water valve V3 is used to supply fresh water steer. The fresh water introduced first goes into the filter 20. From there it can flow further to the pump 24, in particular in order to be injected from above into the drum 13 as water F onto the laundry items W via the injection device 31. Alternatively, the water can be let into the drum container 15 through the drain valve V1 and the drain 17 at the bottom in order to moisten the laundry items W in the drum 13 from below.

The washing machine control 12 is shown here schematically connected only to the drive motor 14, the pump 24 and the supply valve V2. In practice, of course, it is connected to all functional units and also the sensors. Furthermore, it is either connected to a separate weighing device of the washing machine 11 in order to determine the weight of the laundry items W in the dry state. Alternatively, this can be done by evaluating a motor current on the drive motor 14 or on its control or power supply.

In the 2 is shown in simplified form how, in phase 1 corresponding to step B, water is introduced from below through the drain valve V1 into the drum container 15 or into the drum 13. In the first picture, the drum 13 is, so to speak, completely filled with items of laundry W. In the second picture there is water F in the lower area of the drum 13. The drum is slowly rotated counterclockwise, as explained at the beginning, which can be seen in the third and fourth pictures. Here, so to speak, a layer of water F runs upwards in the direction of rotation. All items of laundry W that come into contact with this layer of water F are moistened or moistened. Overall, the drum 13 is rotated at least once, for example in 12 steps of 30° each.

In phase 2 according to 3 the items of laundry W, some of which have been moistened and have therefore become heavier, have partially collapsed, so that a free area S is formed at the top of the drum 13. The injection device 31 is arranged in this free area S, with which water is then injected into this free area S onto the items of laundry W underneath. The drum 13 is then rotated again, see in the second picture, whereby the items of laundry W mix completely again . Then the drum 13 is stopped in order to spray water again from above onto the laundry items W in a free area S that is formed by means of the injection device 31.

Using the previously described steps for calculating or determining the laundry-water ratio, this can be determined until it has been achieved. The corresponding washing program or a corresponding washing process can then be started, with items of laundry that are optimally moistened. In this way, not only time and water can be saved, but items that are too dry or too wet can also be avoided. This could disrupt a washing process or lead to an inadequate washing result, which can be avoided with the invention.

In the 4 the sequence of the method according to the invention is shown again with the essential steps in a block diagram for graphical clarity. Step A with loading the drum 13 with items of laundry W and recording their dry weight has already been carried out as previously described before the actual moistening or moistening starts. According to step B, water is admitted from below through the drain 17 into the drum container 15 as a water flow from below, with the fresh water valve V3 and the drain valve V1 being opened for this purpose. This admission of water can last for a period of time t1, during which the amount of water admitted is recorded. Either after the time period t1 has elapsed or while water is being let in, the drum 13 can be rotated as previously described in individual steps or intervals of 30° each. After each of the individual steps, a break with a duration of time t2 can be taken so that the laundry items W can absorb water. The time period t2 can be in the range of a few seconds, advantageously a maximum of 10 seconds or a maximum of 5 seconds. The drum 13 can advantageously be rotated in twelve individual steps of 30° each, i.e. one entire revolution. Then in a step B' it can be rotated in the opposite direction or reversion in exactly the same way or with the same specifications.

Then the drum 13 stops, the drain valve V1 is closed, while the fresh water valve V3 is opened for a period of time t3. Possibly supported by the pump 24 or solely due to the water pressure, water is allowed into circulation and, according to step C, is sprayed onto the laundry items W from above using the injection device 31. This can be done according to the 3 It can be planned that this happens several times or just once. It may then be possible to rotate the drum similar to step D and stop it again. The rotation speed can be relatively low and between 70 and 100 rpm. As described above, tunneling in the laundry items should be avoided, i.e. excessive rotation speed should definitely be avoided. This should be sensor-controlled or monitored. The already partially moistened items of laundry W fall len then come together again, and water is then applied to the laundry items again in the space that has become free at the top of the injection device 31. In between, the drain valve V1 can be opened according to step D in order to record the amount of water that runs out of the drum container 15 through the drain 17.

Next, according to step F, the drain valve V1 is opened again and the amount of water flowing out through the drain 17 is recorded. It may have been driven or thrown out of the laundry items W by rotation. By rotating the drum at low speed, for example below 100 rpm, the laundry items can be mixed in order to change or loosen the textile density. It can be seen that steps C and E as well as D and F are similar.

Then the drum stops. Subsequently, according to step G, the laundry-water ratio or the moisture level for a specific washing program is calculated or determined based on the previously recorded amounts of water. If this corresponds to the specified value, see step A, then either according to step H on the left, the moistening can be viewed as having been achieved and finished and a specified washing process for the laundry items can begin, for example a full wash cycle or a gentle wash cycle. If the ratio does not yet correspond to the specified value, i.e. the laundry is not yet sufficiently moistened or moistened, then the best thing to do again in step C or step E is to let in more water or use existing water and in any case moisten it Laundry items can be continued.

Claims (16)

Method for operating a washing machine (1), the washing machine having: - a drum container (15), in which a drum (13) is rotatably arranged for receiving items of laundry therein, - an injection device (31) for injecting water from above into the To introduce or inject the drum, - a drive motor (14) for the drum to rotate it, - a power supply for the drive motor, - a drain (17) including drain valve (V1) from the drum container, the drain being carried out by means of the drain valve can be closed in such a way that the drum container can be filled with water at least in a lower area, - a water supply with water pipes, valves, a fresh water inlet (33) into the washing machine, a waste water drain (27) from the washing machine, a pump (24), the drum container, the drain and the injection device, - a washing machine control (12), which is connected to the power supply for the drive motor and to the valves and the pump for controlling them, the following steps being carried out: A a dry weight of laundry items in the drum is recorded and a laundry-water ratio is specified, preferably by a washing program set on the washing machine by a user. B Water is supplied with the drain valve open via the fresh water inlet and from below through the drain into the drum container and into the drum with the Laundry items are introduced into it, whereby the amount of water introduced via the fresh water inlet is recorded or is known, after which or while the drum is rotated slowly or in several partial steps, preferably exactly one revolution in total, C water is injected from above onto the by means of the injection device Laundry items are placed in the drum, the drain being closed by means of the drain valve and the drum is not rotated, the amount of water introduced via the injection device being recorded, D the drum with the laundry items in it is rotated by means of the drive motor at a rotation speed of 70 rpm to 100 rpm in such a way that items of laundry are also present in the area of the rotation axis of the drum or exactly on the rotation axis, with the drain valve being opened in this step D and the presence of water and the amount of water draining through the drain being recorded, E the drum is not rotated and water is applied to the laundry items from above using the injection device with the drain valve closed, F Proceed as in step D with rotating the drum and opening the drain valve in order to drain water from the drum container through the drain to let, whereby the amount of water draining or expired through the drain is recorded, G the total amount of water applied to the drum and onto the laundry items or the total amount of fresh water let into the washing machine and the amount of water drained through the drain are recorded and compared, to determine how much water has been absorbed by the items of laundry in the drum, and if the ratio of this amount of water to the weight of the items of laundry contained in the drum does not yet correspond to the specified laundry-water ratio from step A, water is added again using the Injection device applied to the laundry items from above, H when the ratio of the amount of water absorbed by the laundry items in the drum is too the weight of the items of laundry contained in the drum corresponds to the specified laundry-water ratio from step A, a washing process for the items of laundry begins. Procedure according to Claim 1 , characterized in that an amount of additive required for a washing process, in particular detergent, is calculated based on the known amount of water present in the washing machine and the known water absorption of the laundry items, in particular taking into account specifications of a set or selected washing program for the washing process. Procedure according to Claim 2 , characterized in that a time for adding the additive during the washing process, in particular the detergent, is adjusted since the amount of water in the washing machine or in the drum and in the items of laundry therein as well as the weight of the items of laundry are known. Method according to one of the preceding claims, characterized in that between individual steps B to H the items of laundry are rearranged or mixed in accordance with step B. Method according to one of the preceding claims, characterized in that in step B fresh water is introduced into the drum container, the fresh water being admitted into the washing machine via the fresh water inlet, preferably without a pump. Method according to one of the preceding claims, characterized in that in step B the amount of water introduced is adjusted such that the weight of the laundry items is twice to five times as high as the weight of the water introduced as a predetermined laundry-water ratio corresponding to 2:1 to 5:1. Method according to one of the preceding claims, characterized in that in step B, water is introduced permanently and evenly into the drum container and the drum is constantly moved with a stop of at most 0.5 seconds to 5 seconds after every 10° to 45° of rotation the drum, especially after every 20° to 35° rotation of the drum. Method according to one of the preceding claims, characterized in that after step B and before step C the drum is rotated in the opposite direction to step B, the drum preferably being rotated slowly or in several partial steps. Method according to one of the preceding claims, characterized in that in step C, water is introduced as fresh water from outside in addition to the water introduced in step B. Method according to one of the preceding claims, characterized in that in step D a tunnel sensor device is used to detect whether items of laundry are present in the area of the rotation axis of the drum or exactly on the rotation axis, the tunnel sensor device preferably being designed to work optically Light barrier or reflex light barrier with light direction along the axis of rotation or parallel to the axis of rotation. Procedure according to Claim 10 , characterized in that in step D the drum is rotated at a speed that is 5% to 50%, preferably 10% to 30%, below the speed at which an area of 3 cm around the axis of rotation of the drum is free of Laundry items, in particular the drum is rotated and the speed is increased until it is detected by the tunnel sensor device that an area of 3 cm around the rotation axis of the drum is free of laundry items and / or for a period of remains free of laundry items for at least 3 seconds to 10 seconds, and then the speed is reduced by 5% to 50% or by 10% to 30%. Method according to one of the preceding claims, characterized in that in step D and/or in step F the drain valve is opened and the amount of water draining through the drain is determined, preferably no water being brought into the drum or onto the laundry items during this time is, in particular the amount of water flowing out through the drain being detected via a quantity sensor, the quantity sensor preferably being arranged on or in a filter downstream of the drain through which the water flows behind the drain, in particular the quantity sensor is at least one level sensor. Method according to one of the preceding claims, characterized in that in step E, water present in the water supply is first applied to the laundry items by means of the injection device until a laundry-water ratio specified in step A has not yet been reached, in which case water is added Fresh water inlet is let in, the applied water preferably being taken from the water supply or from a storage arranged in the water supply. Method according to one of the preceding claims, characterized in that in step G, fresh water is supplied via the fresh water inlet until the predetermined laundry-water ratio is reached, the achievement of the predetermined laundry-water ratio preferably being determined by monitoring the motor current of the Drive motor is monitored with determination of the weight of the damp laundry items in the drum. Washing machine for carrying out the method according to one of the preceding claims, comprising: - a drum container in which a drum is rotatably arranged to hold items of laundry therein, - an injection device to introduce or inject water into the drum from above, - a drive motor for the drum to rotate it, - a power supply for the drive motor, - a drain including drain valve from the drum container, the drain being closable by means of the drain valve in such a way that the drum container can be filled with water at least in the lower area, - a water supply with water pipes, valves, a fresh water inlet into the washing machine, a waste water drain from the washing machine, a pump, the drum container, the drain and the injection device, - A washing machine control which is connected to the power supply for the drive motor and to the valves and the pump for controlling them and which is designed to carry out the method according to one of the preceding claims. Washing machine after Claim 15 , characterized in that the water supply has at least one filter (20), which is preferably arranged behind or below the drain, in particular between the drain valve and the pump, with at least one fill level sensor (21) preferably being arranged in the filter.