DE102009029240A1 - Method for handling clothes in program-controllable washing machine with liquor outflow system, involves adding predetermined water amount in drum - Google Patents

Abstract

The method involves adding a predetermined water amount (M-1) in a drum (2). The drum is rotated with a retention speed. Another predetermined water amount (M-2) is added in the drum.

Description

The invention relates to a method for the treatment of laundry in a program-controlled washing machine, which is equipped with a rotatably mounted drum and a sensor, and a particularly suitable for performing this method washing machine. In particular, the invention relates to a method for wetting laundry with a wetting phase in which the rotation of the drum is controlled and the addition of water is controlled by comparing measured values of the sensor with a predetermined threshold value.

When adjusting the amount of water required for washing on the type and amount of laundry to be washed in a program-controlled washing machine, the wetting phase should be optimized so that each batch of laundry with a coordinated amount of water in the tub or in the drum (hereinafter referred to as "laundry drum" designated) is completely and evenly wetted before the actual washing process in the shortest possible time.

The amounts of water used for the wetting should also be reproducible, so that in particular a reproducible entry of heat energy is ensured in the water.

In the DE 10 2004 039 662 A1 a program-controlled washing machine is described with a wetting process, which can be tuned to the amount of laundry in a washing drum rotatably mounted in a tub around a non-vertical axis by means of a water supply system and a control device. The inflow of water into the tub is time controllable, wherein the wetting process is divided into as many phases (Ph1 to Ph3) as quantity levels (small, medium, large) are provided for the laundry to be treated.

In addition, the realization of the wetting is known in that after the entry of a certain amount of water in a drum containing a washing and a Durchfeuchtungsphase a rotating drum is stopped. Water then drips from the laundry until an approximately stable state is reached, which can be demonstrated by means of a nearly constant or only slightly changing pressure value for the hydrostatic pressure of the water. Depending on the extent of pressure increase at standstill of the drum is then decided whether the laundry are saturated with water.

From the DE 199 06 723 C5 a method for washing laundry in a program-controlled washing machine with a tub arranged in a rotatable washing drum is known, with the creasing of the laundry to be washed from the outset largely prevented or at least reduced so much that manual ironing may not or only still needs to be carried out to a small extent. For this purpose, the washing drum is operated in the wetting section with a nearly 100% proportion of movement (mechanics) and the laundry is washed in the main or final wash phase with a proportion of movement of the laundry drum of about 75 to 95%.

The previously known wetting processes or phases can be further optimized. For example, the wetting phase for small laundry items often takes too long, measured by their wetting success. In addition, in the known wetting processes, the uniformity of wetting can be further improved. Finally, it is desirable if the transition from a mesh phase to a wash phase is improved so that the actual washing of the wash can begin relatively early.

The object of the invention was therefore to provide a method for treating laundry in a program-controlled washing machine, in which the wetting phase can be controlled so that a laundry item contained in the drum quickly and reproducibly, d. H. especially with a reproducible amount of water, is wetted. Preferably, especially small items of laundry should be able to be wetted efficiently. Preferably, moreover, the type of laundry to be treated (cotton fibers, synthetic fibers) should be considered in an optimal way.

It was also an object to show a suitable washing machine for carrying out this method.

The object underlying the invention is achieved by a method for the treatment of laundry in a program-controlled washing machine and a corresponding washing machine according to the independent claims. Preferred embodiments of the invention are listed in the respective dependent claims. Preferred embodiments of the method correspond to preferred embodiments of the washing machine, even if not separately pointed out here in each case.

• a) Zugabe einer ersten vorgegebenen Wassermenge M₁ in die Trommel;
• b) Drehen der Trommel mit einer Schöpfgeschwindigkeit;
• c) Zugabe einer zweiten vorgegebenen Wassermenge M₂ in die Trommel;
• d) Drehen der Trommel mit einer Schöpfgeschwindigkeit;
• e) Durchführen der folgenden für die Fälle e1) bis e3) vorgegebenen Schritte e1) für den Fall, dass der gemessene Druckwert p einen vorgegebenen unteren Druckwert P_lim1 erreicht oder unterschreitet, Zugabe einer weiteren Wassermenge M_n (n = 3 bis 100) und, vorausgesetzt, dass keine der Voraussetzungen unter e2) oder e3) erfüllt ist, Wiederholen von Schritt e) mit der Maßgabe, dass der vorgegebene untere Druckwert P_lim2 beträgt und P_lim2 ungleich oder gleich P_lim1 ist; e2) für den Fall, dass die Summe der Wassermengen M_n (n = 1 bis 100) eine vorgegebene Wassermenge M_max erreicht oder überschreitet, Beendigen der Netzphase und Einleiten einer Waschphase; und e3) für den Fall, dass nach Schritt a) ein vorgegebener Zeitraum Δt_max erreicht oder überschritten ist, Beendigen der Netzphase und Einleiten einer Waschphase.

The invention thus relates to a method for the treatment of laundry in a program-controlled washing machine with a liquor outlet system arranged at the bottom of a tub with a drain pump, with a sensor for determining a pressure value P for the laundry hydrostatic pressure (hereinafter also abbreviated to "pressure") of the liquid in the tub, wherein the hydrostatic pressure is measured during the process, a rotatably mounted drum having scooping devices, and a control device comprising in a wetting phase the following steps:

• a) adding a first predetermined amount of water M ₁ in the drum;
• b) rotating the drum at a speed of scooping;
• c) adding a second predetermined amount of water M ₂ in the drum;
• d) rotating the drum at a speed of scooping;
• e) performing the following for the cases e1) to e3) given steps e1) for the case that the measured pressure value p reaches or _{falls below} a predetermined lower pressure value P _lim1 , adding a further amount of water M _n (n = 3 to 100) and provided that none of the conditions in e2) or e3) is satisfied, repeating step e), provided that the predetermined lower pressure value P is _lim2 and P _{lim2 is} not equal to or equal to P _lim1 ; e2) in the event that the sum of the amounts of water M _n (n = 1 to 100) reaches or exceeds a predetermined amount of water M _max , terminating the network phase and initiating a washing phase; and e3) in the event that a predetermined period of time Δt _{max is} reached or exceeded after step a), terminating the network phase and initiating a washing phase.

"Ending the net phase and initiating a washing phase" means, in particular, that a movement program of the drum is coordinated with regard to the performance of a washing process. For this purpose, different reversing rhythms can be set, in which the drum is rotated in different directions for different periods of time. The rotational speed of the drum is adjusted to the optimum mechanical treatment of the laundry and not to an optimal scooping action. Thus, in sensitive laundry with a relatively low speed of rotation of the drum is used.

The detergent needed for washing is preferably already added to the water in the drum during the wetting phase, preferably being rinsed with water into the drum.

Preferably, in the process according to the invention, when one of the cases e1), e2) or e3) occurs, the spinning of the drum is ended at the speed of scooping.

In the method according to the invention, the drum is rotated at a speed of scooping. "Scooping speed" in the sense of the invention is a rotational speed of the drum in which the scooping devices present in the drum are capable of scooping up water and of raining off laundry lying in the drum. In general, there is an optimal scooping speed at which a maximum amount of water is scooped and sprinkled on the laundry ("maximum scooping effect"). The maximum scooping action and thus the optimum scooping speed can be determined, for example, by measuring the change in the hydrostatic pressure P as a function of the scooping speed. If the measured hydrostatic pressure P of the water is minimal, this means that a maximum proportion of the water is scooped and raining off on the laundry. Then there is a maximum scooping action or a maximum scooping speed.

Preferably, the process according to the invention uses a scoop rate which is in the range from -15% to + 15% of the optimum scoop rate.

The spinning of the drum at the speed of discharge presupposes that the scooping devices are principally capable of scooping up water during the rotation of the drum. For scooping devices which are designed so that they are only capable of scooping water in a scooping direction, the drum must be rotated in this so-called scooping direction for this purpose.

The pouring speed is preferably in the range of 25 to 40 revolutions per minute (rpm).

In the method according to the invention, it is preferred that the drum stands still during the addition of the first amount of water M ₁ or is rotated at a speed below the speed of addition.

The amounts of water M ₁ , M ₂ and generally M _n (n = 3 to 100) can vary according to the invention within wide limits, wherein the individual amounts of water can be different in size.

It is preferred that the first amount of water M _{1 is} 20 to 100% of the amount of water M ₂ .

In a preferred embodiment of the method according to the invention, before the steps a) to e) are carried out or before the steps b) to e) are carried out, a load of laundry is determined or predetermined. This is in the In general, the controller used to help.

The determination of the load can be done for example by measuring the increase in weight of the drum due to the load with laundry. Alternatively or in addition, the wicking behavior of water may be analyzed by analyzing the change in hydrostatic pressure during the addition of water to the dry wash.

Thus, for example, in method step a), the hydrostatic pressure P measured with the aid of the sensor can be compared with the amount of water charged. The laundry in the drum absorbs water. The absorbed water can not contribute to an increase of the hydrostatic pressure. By comparing the measured hydrostatic pressure P and the accumulated amount of water - the absolute values and their temporal change - with corresponding, stored in the controller of the washing machine or a storage and comparison unit contained therein, stored values for the moistening of laundry can be the load on laundry and, if necessary, determine their degree of wetness (degree of wetting).

For the determination of the filled amount of water, a measuring device may be present, for example a time measuring device for determining the opening period of a feed valve for the water or a liquid amount measuring device for measuring the amount of water introduced.

However, the loading quantity can also be preset manually by a user of the washing machine, whereby the latter may have previously determined or estimated the loading quantity in another way.

Preferably, the pressure value P _lim1 , the pressure value P _lim2 , the amount of water M _max and / or the period .DELTA.t _{max are set} as a function of the determined or predetermined loading amount of laundry. In this case, the predetermined pressure value P _lim1 and / or the pressure value P _{lim2 may decrease} with increasing loading _amount .

It is furthermore preferred if the pressure value P _lim1 , the pressure value P _lim2 , the amount of water M _max and / or the time period Δt _{max are determined} as a function of the type of wash.

The process according to the invention can be used for a wide range of loadings with laundry. However, the process according to the invention is used particularly advantageously for the treatment of laundry in an amount of up to 3 kg.

The method according to the invention is characterized in that, advantageously, the water in the drum can be heated with a heating device. Preferably, the water can be heated with the heater to a temperature in the range of 25 to 50 ° C.

• a) Zugabe einer ersten vorgegebenen Wassermenge M₁ in die Trommel;
• b) Drehen der Trommel mit einer Schöpfgeschwindigkeit;
• c) Zugabe einer zweiten vorgegebenen Wassermenge M₂ in die Trommel;
• d) Drehen der Trommel mit einer Schöpfgeschwindigkeit;
• e) Durchführen der folgenden für die Fälle e1) bis e3) vorgegebenen Schritte e1) für den Fall, dass der gemessene Druckwert p einen vorgegebenen unteren Druckwert P_lim1 erreicht oder unterschreitet, Zugabe einer weiteren Wassermenge M_n (n = 3 bis 100) und, vorausgesetzt, dass keine der Voraussetzungen unter e2) oder e3) erfüllt ist, Wiederholen von Schritt (e) mit der Maßgabe, dass der vorgegebene untere Druckwert P_lim2 beträgt und P_lim2 ungleich oder gleich P_lim1 ist; e2) für den Fall, dass die Summe der Wassermengen M_n (n = 1 bis 100) eine vorgegebene Wassermenge M_max erreicht oder überschreitet, Beendigen der Netzphase und Einleiten einer Waschphase; und e3) für den Fall, dass nach Schritt a) ein vorgegebener Zeitraum Δt_max erreicht oder überschritten ist, Beendigen der Netzphase und Einleiten einer Waschphase.

The subject of the invention is also a program-controlled washing machine with a liquor drainage system arranged at the bottom of a tub with a drain pump, with a sensor for determining a pressure value P for the hydrostatic pressure of a liquid in the tub, a rotatably mounted drum having scooping devices, and a control device wherein the control device has a storage and comparison unit which is set up to carry out a wetting phase with the following steps:

• a) adding a first predetermined amount of water M ₁ in the drum;
• b) rotating the drum at a speed of scooping;
• c) adding a second predetermined amount of water M ₂ in the drum;
• d) rotating the drum at a speed of scooping;
• e) performing the following for the cases e1) to e3) given steps e1) for the case that the measured pressure value p reaches or _{falls below} a predetermined lower pressure value P _lim1 , adding a further amount of water M _n (n = 3 to 100) and provided that none of the conditions in e2) or e3) is satisfied, repeating step (e) with the proviso that the predetermined lower pressure value P is _lim2 and P _{lim2 is} not equal to or equal to P _lim1 ; e2) in the event that the sum of the amounts of water M _n (n = 1 to 100) reaches or exceeds a predetermined amount of water M _max , terminating the network phase and initiating a washing phase; and e3) in the event that a predetermined period of time Δt _{max is} reached or exceeded after step a), terminating the network phase and initiating a washing phase.

The rotatably mounted drum is preferably mounted rotatably about a substantially horizontal axis in the tub.

The method according to the invention has the advantage that a wetting phase can be controlled very well, with the amount of water and energy used in it being able to be determined reproducibly and with the wetting phase as a whole can be optimally designed in view of the speed and the uniformity of the wetting.

The invention will be described below with reference to the in the 1 to 3 illustrated in the drawings exemplary embodiments.

1 is a schematic representation of the presently relevant parts of a washing machine, in which a method to be explained below can be performed.

2 shows the time course of such a method based on the representation of the time course of the amount of water present in the tub ("water"), measured with a pressure sensor hydrostatic pressure P ("pressure") and the rotational speed of the drum ("speed").

3 shows the time course for a further embodiment of such a method based on the time course of the amount of water present in the tub ("water"), the measured with a pressure sensor hydrostatic pressure P ("pressure") and the rotational speed of the drum ("speed" ).

1 is a schematic representation of relevant for the following explanation parts of a washing machine in which a method to be explained now can be performed. Other embodiments are conceivable. The washing machine of the 1 embodiment shown has a tub 1 in which a drum 2 rotatably mounted and by a drive motor 14 can be operated. According to recent findings for the ergonomics in dealing with such washing machines is the axis of rotation 3 the drum 2 from the horizontal by a small angle (eg 13 °) directed forward above, giving you easier access and insight into the interior of the drum 2 Has. By this arrangement, in cooperation with specially shaped Wäschemitnehmern 4 and scooping devices 5 for the wash liquor 6 on the inner surface of the drum shell also also an intensification of the flood of the laundry 7 achieved with washing liquor and a reduction of the free liquor, so the amount of wash in the tub 1 which can no longer be absorbed by the wash saturated with wash liquor.

The scooping devices 5 the in 1 shown washing machine are designed so that they are here by the arrow 17 displayed clockwise rotation of drum 2 can draw optimal water. This leaves less water in the drum and that of a pressure sensor 15 measured hydrostatic pressure P is lower.

At a standstill of the drum enters the laundry 7 as well as the suds transported with her and in her 6 with a more or less long delay to the bottom of the drum 2 , As a result, the pressure sensor rises 15 measured pressure P.

The method is not limited to a washing machine with such an inclined drum axis, but can also be used in other washing machines with a rotatable in a tub, in particular about a substantially horizontal axis rotatably arranged drum.

• a) Zugabe einer ersten vorgegebenen Wassermenge M₁ in die Trommel 2;
• b) Drehen der Trommel 2 mit einer Schöpfgeschwindigkeit;
• c) Zugabe einer zweiten vorgegebenen Wassermenge M₂ in die Trommel 2;
• d) Drehen der Trommel 2 mit einer Schöpfgeschwindigkeit;
• e) Durchführen der folgenden für die Fälle e1) bis e3) vorgegebenen Schritte e1) für den Fall, dass der gemessene Druckwert P einen vorgegebenen unteren Druckwert P_lim1 erreicht oder unterschreitet, Zugabe einer weiteren Wassermenge M_n (n = 3 bis 100) und, vorausgesetzt, dass keine der Voraussetzungen unter e2) oder e3) erfüllt ist, Wiederholen von Schritt (e) mit der Maßgabe, dass der vorgegebene untere Druckwert P_lim2 beträgt und P_lim2 ungleich oder gleich P_lim1 ist; e2) für den Fall, dass die Summe der Wassermengen M_n (n = 1 bis 100) eine vorgegebene Wassermenge M_max erreicht oder überschreitet, Beendigen der Netzphase und Einleiten einer Waschphase; und e3) für den Fall, dass nach Schritt a) ein vorgegebener Zeitraum Δt_max erreicht oder überschritten ist, Beendigen der Netzphase und Einleiten einer Waschphase.

The washing machine also has a liquor inlet system, which is a water connection fitting for the domestic water network 8th , an electrically controllable valve 9 and a supply line 10 to the tub 1 optionally also via a Waschmitteleinspüleinrichtung ("Einspülschale") 11 may be performed from the feed water detergent portions in the tub 1 can transport. It is also in the tub 1 a heating device 13 , The valve 9 as well as the heater 13 can by a control device 12 be controlled in accordance with a schedule which may be tied to a time schedule and / or the achievement of certain measurements of parameters such as liquor level, liquor temperature, laundry drum speed, etc. within the washing machine. In particular, the control of the addition of amounts of water M _n (n = 3 to 100) and / or the completion of the wetting phase and the initiation of a washing phase by means of the control device 12 on the basis of a sensor 15 for the measurement of the hydrostatic pressure P in the tub 1 (Pressure sensor 15 ) measured duck values. In this case, the control device 12 in a wetting phase in particular the following steps are controlled:

• a) adding a first predetermined amount of water M ₁ in the drum 2 ;
• b) Turn the drum 2 with a scooping speed;
• c) adding a second predetermined amount of water M ₂ in the drum 2 ;
• d) turning the drum 2 with a scooping speed;
• e) performing the following for the cases e1) to e3) given steps e1) for the case that the measured pressure value P reaches or _{falls below} a predetermined lower pressure value P _lim1 , adding a further amount of water M _n (n = 3 to 100) and provided that none of the conditions in e2) or e3) is satisfied, repeating step (e) with the proviso that the predetermined lower pressure value P is _lim2 and P _{lim2 is} not equal to or equal to P _lim1 ; e2) in the event that the sum of the amounts of water M _n (n = 1 to 100) reaches or exceeds a predetermined amount of water M _max , terminating the network phase and initiating a washing phase; and e3) in the event that a predetermined period of time Δt _{max is} reached or exceeded after step a), terminating the network phase and initiating a washing phase.

In the embodiment shown here, the pressure value P _lim1 the pressure value P _lim2 , the amount of water M _max and / or the period .DELTA.t _max depending on the determined or predetermined loading amount based on in the control device 12 deposited relationships between these sizes and the loading amount of laundry set.

The hydrostatic pressure P results from the level H which is in the tub 1 training free fleet. In addition, the washing machine comprises a measuring device 16 for determining the filled amount of water. It can be designed, for example, as a water meter or as a flowmeter. In the case of a flow meter, the amount of water flowed in is calculated in conjunction with a detected filling time. The flow can also be determined by measuring the time to reach a given level height, which corresponds to a certain fixed amount of water. The signals from drive motor 14 , Pressure sensor 15 and measuring equipment 16 become the controller 12 fed.

2 shows the time course of a corresponding method based on the representation of the time course of the amount of water present in the tub ("water") (curve 21 ), the measured with a pressure sensor hydrostatic pressure P ("pressure") (curve 20 ) and the rotational speed of the drum ("speed") (curve 22 ).

At the in 2 shown embodiment of the method, a first predetermined amount of water M ₁ is first added while the drum is stationary (curve part 23 ). Subsequently (recognizable by the course after the intersection between the curves 21 and 22 ), a second predetermined amount of water M _{2 is} added while the drum is rotated at a scooping rate, here a speed of 35 rpm, in the scooping direction, ie, in a direction of scooping efficiency. This addition of water, the movement of the drum and the wetting of the laundry results in the curve 20 Course shown for the hydrostatic pressure in the tub. In particular, it can be seen that the pressure after completion of water addition (kink in the curve 21 ) gradually decreases.

In this embodiment, lower pressure values P _lim are indicated for two different load _quantities . Curve 18 shows the predetermined lower pressure P _lim1 for a load of laundry up to 1 kg and curve 19 shows the predetermined lower pressure P _lim1 for a load of laundry of greater than 1 kg to 2.5 kg. The sloping part of the curve 20 for the hydrostatic pressure, none of the curves intersect in the embodiment shown here 18 or 19 although the amount of laundry used was not more than 2.5 kg. In addition, it can be seen on the time course of the rotational speed that the rotation of the drum with the scooping rate and thus the wetting phase after a certain time, the predetermined time .DELTA.t _max , has ended and then a reversing rhythm has been selected therefor for rotating the drum in a washing phase. In the embodiment shown here, the case e3) of the method according to the invention has thus been realized.

At the in 2 In the embodiment shown, after the second amount of water M _{2 has been} added, the drum is stopped briefly (for example for up to 10 seconds) (rotational speed: 0 rpm). However, during the addition of M ₁ and / or M _2, and beyond, until the end of the wetting phase, the drum may be moved at a sifting rate.

3 shows the time course for a further embodiment of the method with reference to the time course of the amount of water present in the tub ("water") (curve 21 ), the measured with a pressure sensor hydrostatic pressure P ("pressure") (curve 20 ) and the rotational speed of the drum ("speed") (curve 22 ).

At the in 3 shown embodiment of the method, a first predetermined amount of water M ₁ is first added while the drum is stationary (curve part 23 ). Subsequently (recognizable also on the course after the intersection between the curves 21 and 22 ), a second predetermined amount of water M _{2 is} added while the drum is rotated at a scooping rate, here a speed of 35 rpm, in the scooping direction, ie, in a direction of scooping efficiency. This addition of water, the movement of the drum and the wetting of the laundry results in the curve 20 Course shown for the hydrostatic pressure in the tub. In particular, it can be seen that the pressure initially increases due to the addition of water during drum standstill, but drops slightly with the onset of movement of the drum at the speed of discharge. This effect is compensated with increasing water addition. After completion of water addition (kink in the curve 21 ) the pressure drops gradually.

In 3 are given for two different load amounts lower pressure P _lim . Curve 18 shows the predetermined lower pressure (value) P _lim1 for a load of laundry of up to 1 kg and curve 19 shows the predetermined lower pressure (value) P _lim1 for a load of laundry of greater than 1 kg to 2.5 kg. For carrying out the method according to the invention described here is curve 19 for a load of laundry greater than 1 kg to 2.5 kg. If, in the embodiment shown here, the sloping part of the curve 20 for the hydrostatic pressure curve 19 This means that the lower pressure (value) P _{lim1 has been reached} for a load of laundry of greater than 1 kg to 2.5 kg, and thus this load has not been adequately wetted. Therefore, an amount of water M _{3 was} added. Thereafter, the hydrostatic pressure increased to drop after complete addition of M ₃ again. Within the predetermined period .DELTA.t _max , the pressure no longer reached the predetermined lower pressure value P _lim1 (curve 19 ), so that sufficient wetting was recognized and the wetting phase was terminated.

It can be seen here in the time course of the rotational speed that the spinning of the drum at the speed of draining has ended after a certain time Δt _max and then a reversing rhythm has been selected thereon for rotating the drum in a washing phase. Thus, in the embodiment shown here, the above-defined case e3) of the method has been realized, ie the wetting phase has ended due to the reaching of the predetermined period Δt _max .

At the in 3 In the embodiment shown, after the addition of the second quantity of water M ₂ and immediately after the beginning and after the end of the addition of the third quantity of water M ₃ , the drum is stopped briefly (for example for up to 10 seconds) (rotational speed: 0 rpm). However, during the addition of M ₁ , M ₂ and / or M ₃ and beyond until the end of the wetting phase, the drum can be moved at a sudsing speed.

LIST OF REFERENCE NUMBERS

1

tub

2

drum

3

axis of rotation

4

laundry agitator

5

scoop

6

suds

7

Laundry

8th

Water connection fitting for the domestic water network

9

electrically controllable valve

10

Supply line to the tub

11

Washing agent

12

control device

13

heater

14

drive motor

15

pressure sensor

16

Measuring device for determining the filled amount of water

17

optimal direction of rotation for the scooping device

18

predetermined lower pressure P _lim1 for a load of up to 1 kg

19

predetermined lower pressure P _lim1 f for a load of greater than 1 kg to 2.5 kg

20

Course of (hydrostatic) pressure

21

Amount of water in the tub

22

Speed (rotational speed) of the drum

23

Drum arrest

121

Storage and comparison unit

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102004039662 A1 [0004]
• DE 19906723 C5 [0006]

Claims (12)

Process for the treatment of laundry in a program-controlled washing machine with one at the bottom of a tub ( 1 ) arranged liquor drainage system with a drain pump, with a sensor ( 15 ) for determining a pressure value P for the hydrostatic pressure of the in the tub ( 1 ), wherein the hydrostatic pressure is measured during the process, a rotatably mounted drum ( 2 ), which scooping devices ( 5 ), and a control device ( 12 ), comprising in a wetting phase the following steps: f) adding a first predetermined amount of water M ₁ into the drum ( 2 ); g) turning the drum ( 2 ) with a scooping speed; h) adding a second predetermined amount of water M ₂ into the drum ( 2 ); i) turning the drum ( 2 ) with a scooping speed; j) performing the following for the cases e1) to e3) given steps e1) for the case that the measured pressure value P reaches or _{falls below} a predetermined lower pressure value P _lim1 , adding a further amount of water M _n (n = 3 to 100) and provided that none of the conditions in e2) or e3) is satisfied, repeating step (e) with the proviso that the predetermined lower pressure value P is _lim2 and P _{lim2 is} not equal to or equal to P _lim1 ; e2) in the event that the sum of the amounts of water M _n (n = 1 to 100) reaches or exceeds a predetermined amount of water M _max , terminating the network phase and initiating a washing phase; and e3) in the event that a predetermined period of time Δt _{max is} reached or exceeded after step a), terminating the network phase and initiating a washing phase. Method according to Claim 1, characterized in that, when one of the cases e1), e2) or e3) occurs, the rotation of the drum ( 2 ) is ended at the speed of scooping. A method according to claim 1 or 2, characterized in that the scooping speed is in the range of 25 to 40 revolutions per minute (rpm). Method according to one of claims 1 to 3, characterized in that the drum ( 2 ) stands still during the addition of the first amount of water M ₁ or is rotated at a speed below the speed of addition. A method according to claim 4, characterized in that the first amount of water M _{1 is} 20 to 100% of the amount of water M ₂ . Method according to one of claims 1 to 5, characterized in that before the implementation of steps a) to e) the loading amount of laundry is determined or predetermined. A method according to claim 6, characterized in that the pressure value P _lim1 the pressure value P _lim2 , the amount of water M _max and / or the period .DELTA.t _{max is set} in dependence on the determined or predetermined loading amount of laundry. A method according to claim 7, characterized in that the predetermined pressure value P _lim1 and / or the pressure value P _{lim2 decrease} with increasing loading _amount . Method according to one of claims 1 to 8, characterized in that the pressure value P _lim1 , the pressure value P _lim2 , the amount of water M _max and / or the time period Δt _{max is determined} as a function of the type of laundry. Method according to one of claims 1 to 9, characterized in that laundry is used in an amount of up to 3 kg. Method according to one of claims 1 to 10, characterized in that the water in the drum ( 2 ) with a heating device ( 13 ) is heated to a temperature in the range of 25 to 50 ° C. Program-controlled washing machine with a at the bottom of a tub ( 1 ) arranged liquor drainage system with a drain pump, with a sensor ( 15 ) for determining a pressure value P for the hydrostatic pressure of the in the tub ( 1 ), a rotatably mounted drum ( 2 ), which scooping devices ( 5 ), and a control device ( 12 ), characterized in that the control device ( 12 ) a storage and comparison unit ( 121 ), which is adapted to carry out a wetting phase with the following steps: a) adding a first predetermined amount of water M ₁ into the drum ( 2 ); b) turning the drum ( 2 ) with a scooping speed; c) adding a second predetermined amount of water M ₂ into the drum ( 2 ); d) turning the drum ( 2 ) with a scooping speed; e) performing the following for the cases e1) to e3) given steps e1) for the case that the measured pressure value P reaches or _{falls below} a predetermined lower pressure value P _lim1 , adding a further amount of water M _n (n = 3 to 100) and Repeating step (e) with the proviso that the given lower one _Pressure value P _lim2 is and P _{lim2 is} not equal to or equal to P _lim1 ; e2) in the event that the sum of the amounts of water M _n (n = 1 to 100) reaches or exceeds a predetermined amount of water M _max , terminating the network phase and initiating a washing phase; and e3) in the event that a predetermined period of time Δt _{max is} reached or exceeded after step a), terminating the network phase and initiating a washing phase.

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