DE102016110883A1 - clothes dryer - Google Patents

Abstract

The invention relates to a laundry dryer (1) with a laundry drum (15) for receiving laundry (5) to be dried and at least one contactless heating unit (2), which is designed and arranged to heat the laundry drum (15) without contact. The tumble dryer (1) is characterized by a liquid dispensing unit (4), which is designed and arranged to deliver a liquid (40) to the laundry drum (15).

Description

The invention relates to a tumble dryer according to the preamble of patent claim 1 and a method for moistening laundry by means of such a tumble dryer according to the patent claim 13.

For drying laundry laundry dryers have long been used. Here, the wet laundry to be dried is placed by a user through an opening of the tumble dryer in the laundry drum and closed this opening. The laundry drum is then rotated so that the laundry can be moved around. At the same time, hot process air is introduced into the laundry drum in the direction of the axis of rotation of the laundry drum rotation, which dries the laundry. The hot process air is supplied comparatively dry, so that they absorb moisture from the laundry and can carry out with him out of the laundry drum. In this way, the laundry can be dried.

Tumble dryers with steam smoothing or English steamfinishing are also available. The aim of this function is that the user can not remove the laundry completely dry but with a certain low residual moisture from the clothes dryer, so that the laundry, for example, the laundry. during the immediate subsequent ironing, it is easier to smooth and thus gentle.

For this it is known, for example, that the laundry in the tumble dryer is first completely dried. Then, in an additional step, water is sprayed from a nozzle onto the dry laundry. For this, e.g. By means of a pump, spray water is removed from the condensation container of the tumble dryer in order to avoid having to use additional water. However, since the sprayed water can not or hardly evaporate due to the relatively low temperature of the laundry, this is more a moistening of the laundry by spraying than by vapor deposition.

From the EP 1 507 033 A1 is a washing machine known which can produce water vapor. For this purpose, water is passed into a steam device inside the housing of the washing machine. In the steam device is a plate which can be heated by induction from a surrounding coil. The water evaporates on the plate and is then introduced as water vapor via a nozzle in the interior of the laundry drum. Thus, the laundry to be washed can be moistened by steam.

The disadvantage here is that to generate the steam a considerable effort through hoses, must be driven by the steam device and electrical leads of the coil. This not only causes additional costs but also requires additional space.

The present invention thus presents the problem of providing a clothes dryer described above, which can provide the possibility of a function "steam smoothing" in a simpler manner than previously known. At least an alternative to known clothes dryers should be created with this feature.

According to the invention this problem is solved by a tumble dryer with the features of claim 1 and by a method having the features of claim 13. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

The present invention thus relates to a clothes dryer with a laundry drum for receiving laundry to be dried and at least one contactless heating unit, which is designed and arranged to heat the laundry drum without contact. By this is meant that the heating unit can act directly on the laundry drum to heat or heat them. The heat drum can in turn heat the laundry that has absorbed it and thereby dry. Also, the air inside the laundry drum can be heated by the laundry drum. Additional or alternatively usable possibilities for heating and drying the laundry in the laundry drum are not excluded thereby.

The tumble dryer according to the invention is characterized by a liquid dispensing unit, which is designed and arranged to deliver a liquid to the laundry drum. Preferably, this liquid is water, which is preferably at least partially the condensation of moisture removed by the current or previous drying process of the laundry in the laundry drum. As a result, the use of additional water can be dispensed with, which can increase the environmental friendliness of the present invention.

The present invention is based on the idea that in a tumble dryer, the laundry drying is at least partially via a heating of the laundry drum, the heating or heating of the laundry drum can also be used to generate steam, if this, for example, as a function "steam smoothing" or "Steamfinish" should be enabled. Thus, means the contactless heating unit to set only a correspondingly high temperature of eg about 90 ° C and then deliver a liquid such as water to the laundry drum to achieve evaporation of the liquid on the laundry drum. In this way, steam can be generated within the laundry drum, so that the laundry can be moistened with steam. This can be done with water vapor instead of water spray. By using steam, a better smoothing of the laundry can be achieved than with the moistening of the laundry by the spraying with liquid.

It is advantageous in this case that no other technical components are required for steam generation to bring the moisture to evaporate. Thus, steam can be generated without much technical effort.

It is also advantageous that in tumble dryers, which already have the possibility of dispensing liquid on the laundry within the laundry drum, as described above, only the already existing liquid dispensing unit in the direction and, if necessary. In the strength of the delivery of the liquid is changed in that the liquid is dispensed onto the laundry drum instead of the laundry. Preferably, the liquid dispensing unit is to be directed to the upper region of the laundry drum, since this is usually laundry-free. This can be done with existing liquid dispensing units, for example via an adapter, which deflects the direction of the liquid delivery and, if necessary, the pressure increases here. In this way, an implementation of the present invention in existing dryers of this type can be done easily and quickly, without the need for the production of inventive dryer new clothes dryer must be made. Also, the position of the liquid dispensing unit may be. For this purpose be maintained.

According to one aspect of the present invention, the liquid dispensing unit is formed as a spray unit, so that the liquid can be sprayed onto the laundry drum. By spraying, the liquid can be separated into smaller to finer drops to a mist instead of a jet or instead of larger drops. The comparatively small amounts of liquid can reach a larger surface of the laundry drum and be evaporated faster or even completely, so that a more efficient and faster steam generation can be achieved.

According to another aspect of the present invention, the liquid dispensing unit is configured and arranged to deliver the liquid to the inside of the laundry drum. As a result, the steam generation can be done closer to the laundry, so that the laundry can be moistened faster with steam. Also, in this way, a higher proportion of the generated steam can be taken up by the laundry instead of condensing again on other surfaces within the laundry drum.

According to another aspect of the present invention, the non-contact heating unit and the liquid discharging unit are offset from each other in the circumferential direction of the laundry drum. In this way, the laundry drum can first be heated by the heating unit before the liquid is dispensed onto the laundry drum. This allows evaporation of the liquid at higher temperatures. For this purpose, the liquid dispensing unit is preferably arranged downstream of the heating unit in the direction of rotation of the laundry drum.

According to a further aspect of the present invention, the non-contact heating unit is arranged fixed radially outside the laundry drum. In this case, the non-contact heating unit can be arranged, for example, at a radial distance from the laundry drum of preferably up to 2.5 cm in order to maintain a sufficient distance, so that even during operation safe touches can be avoided, but at the same time can be done an efficient heating of the laundry drum. The fixed arrangement of the contactless heating unit, a simple electrical supply can be achieved. Furthermore, a secure and permanently durable positioning and alignment with respect to the rotatable laundry drum can be achieved.

The contactless heating unit may e.g. be placed in the top of one of the corners of the housing of the clothes dryer, where usually next to the cylindrical laundry drum is sufficient space for an additional non-contact heating unit. Furthermore, a sufficient distance to the low-lying region of the laundry drum can be taken in this way, so that the laundry, which can preferably accumulate down in the laundry drum, can be protected by the contactless heating unit before heating the laundry drum.

According to another aspect of the present invention, the non-contact heating unit is an induction heating unit. This may comprise a coil or a plurality of coils, which may be supplied with a high-frequency alternating current or may cause inductive heating by means of a primary magnetic field in the radially outer layer of the material of the laundry drum. For this purpose, the laundry drum is preferably formed from a ferromagnetic material or at least partially has a ferromagnetic material.

It is advantageous here that the use of inductive heating in washing machines and dryers is basically known and tested in practice, so that a safe technique can be used here. This can lead to a high level of customer acceptance for this type of additional heating.

It is also advantageous that the heating effect on ferromagnetic materials in the vicinity of the induction heating unit can be limited, so that unwanted effects on other elements within the tumble dryer can be avoided.

According to a further aspect of the present invention, the contactless heating unit is designed to be operated with a heating power as a function of the quantity of liquid discharged from the liquid dispensing unit onto the laundry drum, or vice versa. In this way, a control or regulation of the steam generation can be carried out by the temperature of the laundry drum can be adjusted by adjusting the heating power to the amount of liquid dispensed thereon. This can be achieved on the one hand, that the maximum possible amount of steam can be generated in order to accelerate this. At the same time it can be ensured that the discharged liquid can also be completely evaporated by the laundry drum in order to avoid wetting of the laundry by excess non-evaporated liquid.

According to a further aspect of the present invention, the contactless heating unit is designed to be operated with a heating power as a function of the speed of the laundry drum, or vice versa. In this way, the heating power can be optimized by e.g. it is ensured that the highest possible speed of the laundry drum driven, but this is below the contact speed. At the same time, the temperature of the laundry drum can be set as high as possible in order to achieve the highest possible heat conduction. Furthermore, the temperature of the laundry drum is kept low enough not to damage the items to be dried laundry. In this case, the temperature of the laundry drum via the contactless heating unit can be adapted to these requirements in order to achieve an optimum result. Therefore, the speed of the laundry drum decreases, so the performance of the contactless heating unit can be adjusted. In this case, the delivery of the liquid to the laundry drum can also be taken into account, as described above.

According to another aspect of the present invention, the clothes dryer further comprises a temperature sensor that is configured and arranged to detect a temperature of the laundry drum. As a result, a temperature detection of the laundry drum can take place in order, for example, to only to dispense liquid onto the laundry drum when and / or as long as the laundry drum is at a temperature of e.g. at least about 90 ° C, which can lead to an effective evaporation of the liquid. The required detection of the temperature of the laundry drum can be done via a temperature sensor.

The temperature sensor is preferably to be arranged at a location above the laundry drum or in the upper region of the space of the laundry drum, so that the temperature detection of the laundry drum can be made there, where usually no laundry is applied to the inside of the laundry drum, as this could falsify the measurement result. Furthermore, the contactless heating unit is usually arranged in this area of the tumble dryer, so that the laundry can not be overheated and damaged by the contactless heating unit if the laundry drum comes to a standstill during operation of the contactless heating unit at least for a short time. It can also be achieved hereby that the temperature sensor can detect the temperature of the laundry drum as directly as possible when this region of the laundry drum has passed the contactless heating unit and thus has its maximum temperature of the current revolution of the laundry drum.

According to a further aspect of the present invention, the temperature sensor is arranged fixed radially outside the laundry drum. This can simplify the electrical supply of the temperature sensor and signal transmission away from the temperature sensor and make safer. This can also be cheaper than a temperature sensor that would move with the laundry drum. Furthermore, a relative to the rotating laundry drum fixedly arranged temperature sensor can detect him passing rotating laundry drum over its entire circumference.

In accordance with another aspect of the present invention, the clothes dryer further includes a humidity sensor configured and arranged to detect moisture within the laundry drum. In this way, this measure can be detected, for example, to control or regulate the use of evaporation at all or the amount of steam generated depending on the moisture within the laundry drum.

According to another aspect of the present invention, the humidity sensor is disposed radially outwardly of the laundry drum. This can simplify the electrical supply of the moisture sensor and the signal transmission away from the moisture sensor and make it safer. This can also be cheaper than a moisture sensor that would move with the laundry drum.

The present invention also relates to a method for moistening laundry by means of a tumble dryer as described above with the steps:

• • start the rotation of the laundry drum,
• • after that time, start the contactless heating of the laundry drum, and
• • Start dispensing a liquid onto the laundry drum.

In this way, a previously described inventive generation of steam within a tumble dryer can be implemented as a method.

According to one aspect of the present invention, after starting the non-contact heating of the laundry drum, the temperature of the laundry drum is detected and the delivery of the liquid to the laundry drum is not started until a predetermined temperature of the laundry drum is reached. This temperature may e.g. at about 90 ° C, since from this temperature effective and rapid evaporation of the liquid can be achieved. In this way it can be ensured that the delivery of liquid to the laundry drum takes place only when the fastest possible and complete evaporation of the liquid due to the sufficient heating of the laundry drum can also be ensured. This can also ensure that the laundry is not moistened by non-evaporated liquid.

• • Beenden der Abgabe der Flüssigkeit auf die Wäschetrommel – in Abhängigkeit einer Zeitdauer seit dem Starten der Abgabe der Flüssigkeit auf die Wäschetrommel, und bzw. oder – in Abhängigkeit einer Anzahl von Umdrehungen der Wäschetrommel seit dem Starten der Abgabe der Flüssigkeit auf die Wäschetrommel, und bzw. oder – in Abhängigkeit der abgegebenen Menge der Flüssigkeit auf die Wäschetrommel, und bzw. oder – in Abhängigkeit des Unterschreitens einer vorbestimmten Temperatur der Wäschetrommel durch eine erfasste Temperatur, und bzw. oder – in Abhängigkeit des Erreichens einer vorbestimmten Feuchtigkeit innerhalb der Wäschetrommel durch eine erfasste Feuchtigkeit.

According to another aspect of the present invention, the method further comprises the subsequent step or steps:

• • terminating the delivery of the liquid to the laundry drum - in response to a period of time since the start of the delivery of the liquid to the laundry drum, and or or - in response to a number of revolutions of the laundry drum since starting the delivery of the liquid to the laundry drum, and or or - depending on the amount of liquid dispensed onto the laundry drum, and / or - in response to falling below a predetermined temperature of the laundry drum by a detected temperature, and / or - in response to reaching a predetermined humidity within the laundry drum a detected moisture.

By fulfilling one of the o.g. Conditions or more of the above. Conditions, the delivery of the liquid to the laundry drum and thus the steam generation can be stopped. This may be the case after a predetermined period of time, but also after a predetermined number of revolutions, after a predetermined amount of the dispensed liquid, falling below a predetermined lower limit temperature of the laundry drum and / or upon reaching a predetermined moisture level within the laundry drum. In this case, the abovementioned predetermined values can be fixed or can also be determined as a function of one another or of other further variables. For example, the period of time after which the discharge of the liquid to the laundry drum is stopped, depending on e.g. the detected temperature of the laundry drum are determined.

An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows

1 a perspective schematic view of a laundry dryer according to the invention;

2 the representation of 1 in section from above;

3 the representation of 1 in partial section from the front;

4 the representation of 1 in section from the left side;

5 a section of the representation of 4 ; and

6 a schematic side schematic diagram of the laundry dryer according to the invention.

1 shows a perspective schematic representation of a tumble dryer according to the invention 1 , 2 shows the representation of 1 in section from above. 3 shows the representation of 1 in partial section from the front. 4 shows the representation of 1 in the section from the left side. 5 shows a section B of the representation of 4 , The laundry dryer 1 extends at a height Z, a depth X and a width Y.

The laundry dryer 1 has a front 10 , a right side 11 , a left side 12 , a back 13 as well as a top 14 on, in the representation of the 1 and 3 the top 14 is omitted to the inside of the tumble dryer 1 at least partially visible. Inside the tumble dryer 1 is a cylindrical laundry drum 15 arranged, which can rotate about a rotation axis A. From the axis of rotation A, the radial direction R is pointing away (cf. 2 and 4 ). The laundry drum 15 can from the front 10 of the tumble dryer 1 through a laundry door 16 with laundry to be dried 5 which are then filled on the inside 15a the laundry drum 15 can be present (cf. 6 ).

The laundry dryer 1 has a heat pump unit 3 on, which is below the laundry drum 15 is arranged (see. 4 ). From the heat pump unit 3 can heated process air via a process air inlet 17 in the laundry drum 15 be initiated to dry the laundry located there (see. 3 and 4 ). The process air can then be via a process air outlet 18 back to the heat pump unit 3 be returned (cf. 1 and 4 ).

The laundry dryer 1 also has a contactless heating unit 2 on which as an induction heating unit 2 each with two induction heating elements 20 in the form of induction coils 20 is provided. The laundry drum 15 is formed accordingly from a ferromagnetic material. The induction heating unit 2 is right up in the corner of the inside of the tumble dryer 1 arranged so that the space available there can be used. Further, the induction heating unit 2 at this position by removing the top cover 14 easily and quickly accessible both during assembly and for maintenance or repair. Also, the induction heating unit 2 Generally far enough away from the laundry at this position, so as not to overrun the laundry drum 15 to overheat in this area.

In this way, an inductive heating of the laundry drum 15 through the induction heating unit 2 respectively. To the thus generated heat of the induction heating unit 2 as completely as possible the interior of the laundry drum 15 to supply, has the laundry drum 15 radially outside an insulation 19 on, which is magnetically permeable and thermally insulating. This is intended to be achieved or favored that the inductively in the laundry drum 15 heat generated as possible not dissipated to the outside but is used to heat the laundry to be dried by means of heat conduction.

That way, the laundry drum can 15 are heated to dry the adjacent laundry by means of heat conduction. Additionally or alternatively, the laundry may, as hitherto known by the process air of the heat pump unit 3 be dried. As a result, on the one hand, the drying time can be shortened. On the other hand, the efficiency of the tumble dryer can also be improved by increased enthalpy flow 1 increase. There are various combinations of the operation of the two heat sources, ie the induction heating unit 2 and the heat pump unit 3 , possible to achieve the optimum result according to various criteria such as the shortest possible drying time, the lowest possible energy consumption, as gentle as possible drying for different types of laundry or moisture levels of the laundry, etc.

According to the invention, the tumble dryer 1 a liquid dispensing unit 4 in the form of a spray unit 4 on which water 40 as a liquid 40 on the inside 15a the laundry drum 15 can give off spray (cf. 5 and 6 ). The spray unit 4 Can also be used as a water nozzle 4 be designated. In this way, according to the invention, the inductively heated laundry drum 15 or their inside 15a be used to steam if necessary 41 to moisten the laundry by creating the inside 15a the heated laundry drum 15 with water 40 is sprayed (see also 6 ).

6 shows a schematic side schematic diagram of the laundry dryer according to the invention 1 , On the basis of this schematic representation of a flow of a steam generation according to the invention will now be explained in more detail:
As in the presentation of 6 shown, the inventive clothes dryer 1 According to the present embodiment, further, a temperature sensor 42 on, which above the laundry drum 1 is arranged about its highest point and preferably approximately centrally in the depth Y. The temperature sensor 42 is to the outer surface of the laundry drum 15 aligned to detect their temperature value.

Further, in the immediate vicinity of the temperature sensor 42 a humidity sensor 43 arranged to set a value of humidity within the laundry drum 15 capture. The moisture sensor 43 However, it can also be in depth Y next to the temperature sensor 42 be arranged or eg on a vertical surface such as above the process air inlet 17 the laundry drum 15 if there the moisture value is easier and / or more accurate to capture.

The laundry drum 15 can move in operation in its circumferential direction U in two directions. In the presentation of the 6 finds one Rotation of the laundry drum 15 about the rotation axis A counterclockwise in a direction of rotation V instead. In this case, a comparatively low rotational speed in the range greater than 0 and less than 90 revolutions per minute, preferably greater than 0 and less than 50 revolutions per minute, is selected, so that the laundry 5 only slightly from the lowest point of the laundry drum 15 is taken by the rotational movement, but then back to the lowest point of the laundry drum 15 falling back. In this way, it can be ensured that the laundry 5 despite rotation of the laundry drum 15 a sufficient distance to the induction heating unit 2 and the inductively heated area of the laundry drum 15 maintains.

The induction heating unit 2 is now operated with such a high power that the moving past areas of the laundry drum 15 be heated inductively strong. In this case, the degree of heating over the subsequently arranged in the direction of rotation V temperature sensor 42 recorded, so that on the one hand, an overheating of the laundry drum 15 by timely limiting the power of the induction heating unit 2 can be avoided. On the other hand, the spraying of the inside 15a the laundry drum 15 be started as soon as the temperature sensor 42 it is detected that the laundry drum 15 has reached a temperature of, for example, at least 90 ° C. Then there is water 40 from the water nozzle 4 on the inside 15a the laundry drum 15 sprayed, which to steam 41 as evaporated liquid 41 evaporated.

The spraying is done after a full turn of the laundry drum 15 finished, so that the generated water vapor 41 from the laundry 5 can be included. Furthermore, the laundry drum has 15 by the evaporation of the water 40 cooled down, leaving the laundry drum 15 must first be inductively heated to about 90 ° C before again an effective evaporation can be made.

This water vapor 41 can do the laundry 5 Moisten so that a "steam smoothing" or "steamfinishing" function using water vapor 41 can be easily implemented and provided.

Alternatively, the spraying could also be terminated as soon as a temperature of, for example, 80 ° C is exceeded, since below this temperature evaporation can not be made so effectively that at least partially moisten the laundry 5 directly through the water 40 can be excluded.

Alternatively, the spraying could be terminated as soon as a predetermined amount of water, for example, between 0.1 liter and 1.2 liters on the inside 15a the laundry drum 15 was sprayed on.

Alternatively, the spraying could also be terminated as soon as a predetermined target moisture content within the laundry drum 15 was achieved.

LIST OF REFERENCE NUMBERS

A

Rotation axis of the laundry drum 15

B

Detail of the 4

R

 radial direction

U

 circumferential direction

V

Direction of rotation of the laundry drum 15

X

 Longitudinal direction; depth

Y

 Transverse direction; width

Z

 height

1

 clothes dryer

10

 front

11

 right side

12

 left side

13

 back

14

 top

15

 washing drum

15a

Inner side or inner surface of the laundry drum 15

16

 Washing drum door

17

Process air inlet of the laundry drum 15

18

Process air outlet of the laundry drum 15

19

External insulation of the laundry drum 15

2

 contactless heating unit; induction heating; Infrared heating unit

20

 Induction heating elements; inductors

3

 heat pump unit

4

 Liquid dispensing unit; spray; (Water) nozzle

40

 Liquid; water

41

 evaporated liquid; Steam

42

 temperature sensor

43

 humidity sensor

5

 Laundry

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

• EP 1507033 A1 [0005]

Claims (15)

Tumble dryer ( 1 ), with a laundry drum ( 15 ) for receiving laundry to be dried ( 5 ), and at least one contactless heating unit ( 2 ), which is formed and arranged, the laundry drum ( 15 ) contactlessly, characterized by a liquid dispensing unit ( 4 ), which is designed and arranged, a liquid ( 40 ) on the laundry drum ( 15 ). Tumble dryer ( 1 ) according to claim 1, wherein the liquid dispensing unit ( 4 ) as a spray unit ( 4 ) is formed so that the liquid ( 40 ) on the laundry drum ( 15 ) can be sprayed. Tumble dryer ( 1 ) according to claim 1 or 2, wherein the liquid dispensing unit ( 4 ) is formed and arranged, the liquid ( 40 ) on the inside ( 15a ) the laundry drum ( 15 ). Tumble dryer ( 1 ) according to one of the preceding claims, wherein the contactless heating unit ( 2 ) and the liquid dispensing unit ( 4 ) in the circumferential direction (U) of the laundry drum ( 15 ) are offset from one another. Tumble dryer ( 1 ) according to one of the preceding claims, wherein the contactless heating unit ( 2 ) radially outside the laundry drum ( 15 ) is fixed. Tumble dryer ( 1 ) according to one of the preceding claims, wherein the contactless heating unit ( 2 ) an induction heating unit ( 2 ). Tumble dryer ( 1 ) according to one of the preceding claims, wherein the contactless heating unit ( 2 ) is formed, with a heating power in dependence of the liquid dispensing unit ( 4 ) on the laundry drum ( 15 ) operated amount of liquid to be operated, or vice versa. Tumble dryer ( 1 ) according to one of the preceding claims, wherein the contactless heating unit ( 2 ) is formed, with a heating power as a function of the speed of the laundry drum ( 15 ) or vice versa. Tumble dryer ( 1 ) according to one of the preceding claims, further comprising a temperature sensor ( 42 ), which is designed and arranged, a temperature of the laundry drum ( 15 ) capture. Tumble dryer ( 1 ) according to claim 9, wherein the temperature sensor ( 42 ) radially outside the laundry drum ( 15 ) is fixed. Tumble dryer ( 1 ) according to one of the preceding claims, further comprising a moisture sensor ( 43 ), which is constructed and arranged, a moisture within laundry drum ( 15 ) capture, Tumble dryer ( 1 ) according to claim 11, wherein the humidity sensor ( 43 ) radially outside the laundry drum ( 15 ) is fixed. Method for moistening laundry ( 5 ) by means of a tumble dryer ( 1 ) according to one of claims 1 to 12, comprising the steps of: starting the rotation of the laundry drum ( 15 ), temporally hereafter, starting the contactless heating of the laundry drum ( 15 ), and starting the delivery of a liquid ( 40 ) on the laundry drum ( 15 ). The method of claim 13, wherein after starting the contactless heating of the laundry drum ( 15 ) the temperature of the laundry drum ( 15 ) and the delivery of the liquid ( 40 ) on the laundry drum ( 15 ) is started only when a predetermined temperature of the laundry drum ( 15 ) is reached. A method according to claim 13 or 14, further comprising the subsequent step (s): terminating the dispensing of the liquid ( 40 ) on the laundry drum ( 15 ) in dependence on a period of time since the start of the delivery of the liquid ( 40 ) on the laundry drum ( 15 ), and / or depending on a number of revolutions of the laundry drum ( 15 ) since starting the delivery of the liquid ( 40 ) on the laundry drum ( 15 ), and / or depending on the amount of liquid delivered ( 40 ) on the laundry drum ( 15 ), and / or depending on the falling below a predetermined temperature of the laundry drum ( 15 ) by a detected temperature, and / or depending on the reaching of a predetermined moisture within the laundry drum ( 15 ) by a detected moisture.

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