EP2052106B1 - Method and household appliance for drying wet laundry - Google Patents
Method and household appliance for drying wet laundry Download PDFInfo
- Publication number
- EP2052106B1 EP2052106B1 EP07787370.1A EP07787370A EP2052106B1 EP 2052106 B1 EP2052106 B1 EP 2052106B1 EP 07787370 A EP07787370 A EP 07787370A EP 2052106 B1 EP2052106 B1 EP 2052106B1
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- EP
- European Patent Office
- Prior art keywords
- laundry
- temperature
- drying
- drum
- moisture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
- D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/28—Air properties
- D06F2103/32—Temperature
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/28—Electric heating
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/62—Stopping or disabling machine operation
Definitions
- the present invention relates to a method for controlling the drying of wet laundry in a laundry drum of a domestic appliance for drying wet laundry in which hot air is generated and in which a drying process is terminated taking into account at least one moisture value or a corresponding reading of the laundry to be dried ,
- the invention relates to a household appliance for drying damp laundry, in particular a clothes dryer or washer dryer, for controlling the drying of wet laundry by means of a hot air generated by a heater, with a laundry drum accommodating the laundry, which is driven by a motor, which together with said heating device is controllable by a control device, and with at least one measuring device which measures at least one moisture value or a corresponding measured value of the laundry to be dried for evaluation and termination of the respective drying process by the control device.
- a washer-dryer is understood here to mean a corresponding domestic appliance in which laundry is washed and e.g. can be dried afterwards;
- a tumble dryer is understood to mean a corresponding household appliance in which moist laundry can only be dried.
- a current-carrying measuring device in a laundry drum or washing drum is usually used (see, for example, US Pat DE 36 42 459 C3 ).
- the respective washing drum or washing drum mentioned measuring device is touched by the laundry to be dried.
- the ohmic measuring resistor in the measuring device is inversely proportional to the laundry moisture.
- the laundry In high humidity after washing and spinning, the laundry has a resistance of a few ohms, and in the dry state, the resistance is up to several megohms.
- a program control it is possible to compare a voltage value corresponding to the respective resistance as a voltage actual value with a predetermined voltage set value, and when the voltage set value is exceeded by the voltage actual value, the drying process can be ended.
- process variables - such as the actual elapsed time since program start, temperature values and humidity values of the laundry to be dried - are measured continuously or at least periodically several times per second.
- predetermined threshold values depending on the program parameters entered, the type, quantity and / or initial moisture content of the laundry relating to each call of a plurality of stored process sequences is sent to the memory unit for outputting to the program control device and for processing.
- a first reason for this problem is that measurement errors can occur during the drying process, depending on the particular type of laundry. In such cases, the respective measured value can reach a preset setpoint significantly earlier than expected and thus cause the process to be switched off with too much laundry moisture.
- An example of such an adverse case is e.g. drying of fed anoraks. In this case, the anorak plastic fiber can dry very quickly and, in resistance measurement, provide a signal to finish the drying process even though the interior of the anorak is still wet.
- a second reason is given by the fact that at very low loading of the laundry drum, a poor contact between the laundry items therein and the moisture sensors protruding into the laundry drum for laundry resistance can prevail and then incorrect values are passed to the associated control unit.
- a third reason is that the residual moisture in the laundry changes rather slowly during an advanced drying process. For this reason, only a relatively inaccurate estimation of the progress of the drying process by evaluating the residual moisture values is possible under given manufacturing and measurement tolerances for the humidity sensors.
- a threshold value for terminating the drying process can only be defined with a sufficient safety margin, which leads to a certain extension of the drying process beyond what is actually necessary. Also, this method can cause an undesirable over-drying of the laundry in fast-drying types of laundry.
- the invention is therefore based on the object to show a way, as in a method and a household appliance for drying damp laundry of the type mentioned in a relatively simple manner or with relatively little effort while avoiding one of the respective type of laundry and / or quantity Dependent over- or under-drying of the laundry, a shutdown of the household appliance after running the respective drying process can be guaranteed at the desired time in each case.
- the above-described object is achieved in a method of the type mentioned in the present invention by additionally determining a drying value of the laundry during or after reaching a predetermined moisture value or a corresponding measured value, the respective laundry type and / or the respective loading state of the laundry drum corresponding temperature size is used for targeted termination of drying.
- the invention has the advantage that it is ensured in a particularly simple manner that depending on the particular type and amount of laundry over- or under-drying is avoided and that the respective drying process can be ended at the respectively desired right time, so then when the laundry in question is dried in the desired manner. This is achieved by additionally using the mentioned temperature variable in correlation to a specific moisture value or a corresponding measured value.
- the invention is based on the finding that the temperature of the exhaust air flowing out of the laundry drum after an initial increase caused by the heating of the laundry and the appliance over the course of the drying process shows only a slight change and increases significantly again towards the end of the drying process. It is assumed that the temperature of the supply air flowing into the laundry drum is kept substantially constant, as it also corresponds to common practice. In a case in which such constancy is not given, what is said applies the difference between the temperatures of the supply air and the exhaust air.
- the slight change in the temperature of the exhaust air or the difference over large parts of the drying process is due to the fact that a steady state is formed in which the moisture is evaporated from the surface of the fibers of the laundry to be dried and removed with the exhaust air.
- An expedient development of the invention is to evaluate the absolute values of the drying temperature. This brings with it the advantage of a particularly simple measurement.
- the temperature of the exhaust air at the drum outlet of the tumble dryer from the beginning of the drying phase preferably be measured periodically.
- variations in the heating, the mains voltage, the loading of the laundry drum, the ambient temperature and the maintenance status of the device are taken into account.
- the gradient of the drying temperature profile is evaluated.
- the advantage is achieved that the dryness state of the laundry in the laundry drum can be detected even more precisely.
- the temperature changes of the exhaust air are detected at the drum outlet, and the associated measured values are stored for evaluation in an existing control device. These values representing actual values can then be compared in the respective control device with the predetermined temperature setpoint values corresponding to the respective type of laundry and / or the respective loading state of the laundry drum.
- the above object is achieved in a household appliance for drying damp laundry by means of a hot air generated by a heater, with a washing drum receiving the laundry, which is drivable by a motor which is controllable together with said heating means by a control device, and at least a measuring device which measures at least one moisture value or a corresponding measured value of the laundry to be dried for evaluation and termination of the respective drying operation by the control device, according to the invention achieved in that in addition a temperature-measuring device is provided by the one when drying the laundry during or after reaching a predetermined moisture value or a measured value corresponding to this, the respective size of the laundry and / or the respective loading state of the laundry drum corresponding temperature size of the control device for targeted Ending the drying is evaluable.
- the temperature value of the particular drying temperature absolute value is to be processed by the control device. This results in an advantageous manner with a particularly low measurement effort.
- the temperature variable to be processed by the control device is the gradient of a drying temperature profile given by at least two temperature measured values.
- This can be the Control device to control a drying process in response to changes in temperature even more accurate. After a required moisture limit value of the laundry is reached, namely, as will be seen below, the temperature curve increases even more, and only in this area, the gradient of the relevant temperature profile is determined as the actual size, with a predetermined size representing predetermined temperature can be compared.
- the temperature variable is derived from exhaust air emerging from the laundry drum.
- the temperature measuring device is in particular placed on the laundry drum outlet, and it functions as a temperature sensor for measuring the exhaust air of the clothes dryer exiting through an exhaust air duct.
- the measured values of the exhaust air temperature provide the additional information about the dryness state of the laundry in the tumble dryer.
- Fig. 1 shows a schematic representation of a washing or drying machine 1, which essentially comprises a washing drum 2 for receiving each laundry to be dried, the laundry drum 2 in rotation staggering motor 3 and a controlling this control device 4, which also control a heater 5 allowed.
- This heater 5 is in Fig. 1 as heating resistor 5 indicated, which is connected with its remote from the control device 4 end to a terminal 6, which is connected for example to the neutral of a mains AC voltage source (not shown).
- the control device 4 allows the connected to the end of the heating resistor 5 to supply a phase voltage of said AC mains voltage source, for example via a normally open contact of a mechanical relay.
- the heated by this or this heated air by means of a fan blade, not shown here, also driven by the motor 3 is introduced into the laundry drum 2 as a hot air stream. With this stream of hot air is then dried in the laundry drum 2 located wet laundry. The moisture of the laundry to be dried with leading hot air flow is then removed as exhaust air from the laundry or dryer 1.
- a resistance measuring device 7 In the laundry drum 2 is a resistance measuring device 7 with two spaced-apart electrodes 8, 9. With this resistance measuring device 7, a respective moisture value of the laundry drum 2 located in the laundry to be dried corresponding resistance measurement value is determined. With wet laundry, the resistance to be measured between the two measuring electrodes 8, 9 is of the order of a few ohms, and in the case of dry laundry the relevant resistance value is up to several megohms. It should be noted at this point that, in principle, the moisture value of the laundry in each case located in the laundry drum 2 can also be measured by means of a moisture meter; in the Fig. 1 However, shown arrangement with the resistance-measuring device 7 is preferably used because of its simplicity and robustness in washing or tumble driers.
- a temperature sensor 10 is further provided, which is a temperature-measuring device with which, as will be explained below, for example, the temperature of the exiting the laundry drum 2 exhaust air is determined.
- the two measuring electrodes 8, 9 comprehensive resistance measuring device 7 is according to Fig. 1 connected in series with an ohmic resistor 11 to a DC voltage source 12, which outputs a DC voltage of, for example, 1.5V.
- the resistance measuring device 7 and the ohmic resistor 11 thus constitute a voltage divider, with the resistance measuring device 7, a measuring device 13 is connected, which is in the present case, a voltage-measuring device.
- This voltage measuring device measures the respective voltage drop across the resistance measuring device 7 from the DC voltage source 12. This voltage corresponds to the respective moisture value of the laundry to be dried located in the laundry drum 2.
- the relevant voltage-measuring device 13 is the output side one of the respectively measured voltage corresponding output signal, for example, a corresponding output voltage from which is supplied to the one input of a comparator unit 14, which is supplied to a voltage applied to a terminal 15 threshold voltage at another input.
- This comparator unit 14 may be designed so that when the threshold voltage is not exceeded by the output voltage of the voltage measuring device 13 output side, for example, a binary "0" is issued and that when exceeding the threshold voltage by the aforementioned output voltage of the voltage measuring device 13 output a binary signal "1" is delivered.
- the respective binary signals "0" and "1" are fed to the control device 4 on the input side.
- the said control device 4 is on the input side still connected to a program selector 16, by its setting, for example, different drying programs and thus running times of the engine 3 and heating times or types of the heater 5 can be set. With the relevant setting, the drying of different types of laundry and / or different loading conditions of the laundry drum 2 can be taken into account and corresponding setpoint values of the control device 4 for a targeted shutdown of the respective drying process can be supplied. In the control device then takes place a target value-actual value comparison between a respective predetermined setpoint temperature variable and the actual measured temperature measured in each case, as will be seen below in more detail.
- the relative laundry moisture WF in the laundry drum 2 according to Fig. 1 70% linen to be dried.
- the temperature ⁇ at this time is at an ambient temperature of, for example, 25 ° C.
- the temperature 9 increases to a time of about 80 minutes only by about 20 ° C, while the relative laundry moisture WF has dropped according to the moisture profile 17 up to this time (80 min) to a few percent and only slightly changed.
- the relative laundry moisture WF of the laundry to be dried contained in the laundry drum 2 is not directly measured by a humidity meter, but a measured value corresponding to the respective humidity between the measuring electrodes 8 and 9 of the resistance measuring device 7 is determined.
- the relevant reading is according to Fig. 1 a voltage measured value which is determined by means of the voltage measuring device 13, the output signal of which is then compared or evaluated in the comparator unit 14 with a threshold value.
- the comparator unit 14 emits a binary signal "1" indicating the exceeding of the relevant threshold value by the output signal output by the voltage measuring device 13, for example at a point in time to which the voltage measuring device 13 a voltage value is measured, the relative laundry moisture WF in Fig. 2 in the moisture range indicated therein 20 corresponds - in this humidity range 20, the relative laundry moisture WF, for example, 10%.
- the control device 4 With the delivery of the aforementioned binary signal "1" from the comparator unit 14, the control device 4 according to Fig. 1 causes the determined by the temperature sensor 10 in the exhaust air of the laundry drum 2 temperature 9 for a targeted termination of the drying use. In this case, either the absolute value of the temperature ⁇ determined by the temperature sensor 10 or the gradient of the temperature profile 18 according to FIG Fig. 2 be evaluated by the controller 4.
- this temperature profile 18 it has been shown that towards the end of the drying process, ie when the moisture remaining in the laundry corresponds to a customary desirable residual moisture, it has a temperature rise region 21.
- This increase 21 thus marks a time range in which the drying process should be stopped, and this with a significantly greater clarity than would be possible under evaluation of the laundry moisture 20.
- the necessary temperature evaluation is carried out by the control device 4, namely by carrying out a setpoint-actual value comparison between a set by the program selector 16 according to the respective type of laundry and / or the respective load state of the laundry drum 2 setpoint temperature and the determined by the temperature sensor 10 actual value -Temperature.
- the temperature increase 21 is determined by measuring and evaluating the temperature of the exhaust air, in order to then terminate the drying in the tumble dryer 1 in a targeted manner.
- the gradient of the temperature profile in the control device 4 can be set in this by the program selector 16 of the respective type of laundry and / or the respective load state of the laundry drum 2 corresponding setpoint temperature gradient.
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- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
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Description
Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Steuern des Trocknens feuchter Wäsche in einer Wäschetrommel eines Hausgeräts zum Trocknen feuchter Wäsche, in welchem Warmluft erzeugt wird und in welchem ein Trocknungsvorgang unter Berücksichtigung zumindest eines Feuchtigkeitswertes oder eines diesem entsprechenden Messwertes der zu trocknenden Wäsche beendet wird.The present invention relates to a method for controlling the drying of wet laundry in a laundry drum of a domestic appliance for drying wet laundry in which hot air is generated and in which a drying process is terminated taking into account at least one moisture value or a corresponding reading of the laundry to be dried ,
Außerdem bezieht sich die Erfindung auf ein Hausgerät zum Trocknen feuchter Wäsche, insbesondere einen Wäschetrockner oder Waschtrockner, zum Steuern des Trocknens von feuchter Wäsche mittels durch eine Heizeinrichtung erzeugter Warmluft, mit einer die Wäsche aufnehmenden Wäschetrommel, die von einem Motor antreibbar ist, der zusammen mit der genannten Heizeinrichtung durch eine Steuereinrichtung steuerbar ist, und mit wenigstens einer Messeinrichtung, die zumindest einen Feuchtigkeitswert oder einen diesem entsprechenden Messwert der zu trocknenden Wäsche für eine Auswertung und Beendigung des jeweiligen Trocknungsvorgangs durch die Steuereinrichtung misst.In addition, the invention relates to a household appliance for drying damp laundry, in particular a clothes dryer or washer dryer, for controlling the drying of wet laundry by means of a hot air generated by a heater, with a laundry drum accommodating the laundry, which is driven by a motor, which together with said heating device is controllable by a control device, and with at least one measuring device which measures at least one moisture value or a corresponding measured value of the laundry to be dried for evaluation and termination of the respective drying process by the control device.
Unter einem Waschtrockner wird vorliegend ein entsprechendes Hausgerät verstanden, in welchem Wäsche gewaschen und z.B. im Anschluss daran getrocknet werden kann; unter einem Wäschetrockner wird ein entsprechendes Hausgerät verstanden, in welchem feuchte Wäsche lediglich getrocknet werden kann.A washer-dryer is understood here to mean a corresponding domestic appliance in which laundry is washed and e.g. can be dried afterwards; a tumble dryer is understood to mean a corresponding household appliance in which moist laundry can only be dried.
Zur wäschefeuchtigkeitsabhängigen Steuerung eines Hausgeräts zum Trocknen feuchter Wäsche wird üblicherweise eine stromdurchflossene Messvorrichtung in einer Wäschetrommel bzw. Waschtrommel verwendet (siehe z.B.
Weiterhin ist versucht worden, die Temperatur der Abluft, die nach dem Durchtritt durch die Wäsche aus der Wäschetrommel austritt, als Hilfsgröße für das Beenden des Trocknungsprogramms zu verwenden. Dabei nutzt man den Effekt aus, dass bei zunehmend trockener Wäsche weniger Wärmeenergie zum Verdunsten des in der Wäsche enthaltenen Wassers verwendet wird und damit die Temperatur der Luft am Wäschetrommelaustritt ansteigt. Dieses Verfahren ist jedoch nicht genau genug, um die jetzt bestehenden hohen Anforderungen an die Abschaltgenauigkeit von Haushaltswäschetrocknern zu erfüllen.Furthermore, it has been tried to use the temperature of the exhaust air, which exits after passing through the laundry from the laundry drum, as an auxiliary size for the termination of the drying program. It uses the effect that with increasingly dry laundry less heat energy is used to evaporate the water contained in the laundry and thus increases the temperature of the air at the laundry drum outlet. However, this method is not accurate enough to meet the high demands now placed on the shutdown accuracy of household tumble driers.
Es ist auch schon ein Verfahren zum Steuern von Trocknungsvorgängen in einem Hausgerät zum Trocknen feuchter Wäsche bekannt (
Es ist ferner ein Verfahren zum Verändern des Programmablaufes in einem Hausgerät zum Trocknen feuchter Wäsche bekannt (
Ein erster Grund für dieses Problem besteht darin, dass während des Trocknungsprozesses abhängig von der jeweiligen Wäscheart Messfehler entstehen können. In solchen Fällen kann der jeweilige Messwert deutlich früher als erwartet einen voreingestellten Sollwert erreichen und somit eine Abschaltung des Prozesses mit einer zu hohen Wäschefeuchtigkeit bewirken. Ein Beispiel für einen derartigen ungünstigen Fall stellt z.B. die Trocknung von gefütterten Anoraks dar. In diesem Fall kann die Anorak-Kunststofffaser sehr schnell trocknen und bei der Widerstandsmessung die Lieferung eines Signals zur Beendigung des Trocknungsvorgangs bewirken, obwohl das Innere des Anoraks noch feucht ist.A first reason for this problem is that measurement errors can occur during the drying process, depending on the particular type of laundry. In such cases, the respective measured value can reach a preset setpoint significantly earlier than expected and thus cause the process to be switched off with too much laundry moisture. An example of such an adverse case is e.g. drying of fed anoraks. In this case, the anorak plastic fiber can dry very quickly and, in resistance measurement, provide a signal to finish the drying process even though the interior of the anorak is still wet.
Ein zweiter Grund ist dadurch gegeben, dass bei sehr geringer Beladung der Wäschetrommel ein schlechter Kontakt zwischen den darin befindlichen Wäschestücken und den zur Wäschewiderstandsmessung in die Wäschetrommel ragenden Feuchtesensoren vorherrschen kann und daraufhin falsche Werte an die zugehörige Steuereinheit geleitet werden.A second reason is given by the fact that at very low loading of the laundry drum, a poor contact between the laundry items therein and the moisture sensors protruding into the laundry drum for laundry resistance can prevail and then incorrect values are passed to the associated control unit.
Ein dritter Grund besteht darin, dass die Restfeuchte in der Wäsche bei fortgeschrittenem Trocknungsprozess sich eher langsam verändert. Schon deshalb ist unter gegebenen Fertigungs- und Messtoleranzen für die Feuchtesensoren nur eine relativ ungenaue Abschätzung des Fortschritts des Trocknungsprozesses durch Auswertung der Restfeuchtewerte möglich. Insbesondere kann ein Schwellwert zur Beendung des Trocknungsprozesses nur mit einer hinreichenden Sicherheitsmarge definiert werden, was zu einer gewissen Verlängerung des Trocknungsprozesses über das eigentlich notwendige Maß führt. Auch kann dieses Verfahren bei schnell trocknenden Wäschearten ein unerwünschtes Übertrocknen der Wäsche verursachen.A third reason is that the residual moisture in the laundry changes rather slowly during an advanced drying process. For this reason, only a relatively inaccurate estimation of the progress of the drying process by evaluating the residual moisture values is possible under given manufacturing and measurement tolerances for the humidity sensors. In particular, a threshold value for terminating the drying process can only be defined with a sufficient safety margin, which leads to a certain extension of the drying process beyond what is actually necessary. Also, this method can cause an undesirable over-drying of the laundry in fast-drying types of laundry.
Ferner wird auf
Der Erfindung liegt daher die Aufgabe zugrunde, einen Weg zu zeigen, wie bei einem Verfahren und einem Hausgerät zum Trocknen feuchter Wäsche der eingangs genannten Art auf relativ einfache Weise bzw. mit relativ geringem Aufwand unter Vermeidung einer von der jeweiligen Wäscheart und/oder -menge abhängigen Über- oder Untertrocknung der Wäsche eine Abschaltung des Hausgeräts nach Ausführen des jeweiligen Trocknungsvorgangs zum jeweils gewünschten richtigen Zeitpunkt gewährleistet werden kann. Bezogen auf die im Zusammenhang mit den zuletzt betrachteten Fällen von in einer Trommel zu trocknender Wäsche heißt dies, dass zum einen z.B. gefütterte Anoraks solange getrocknet werden sollen, bis auch das jeweilige Anorakfutter frei von Feuchtigkeit ist, und dass zum anderen bei geringer Beladung der Wäschetrommel keine Übertrocknung der von dieser aufgenommenen Wäsche erfolgt, also eine Übertrocknung vermieden wird.The invention is therefore based on the object to show a way, as in a method and a household appliance for drying damp laundry of the type mentioned in a relatively simple manner or with relatively little effort while avoiding one of the respective type of laundry and / or quantity Dependent over- or under-drying of the laundry, a shutdown of the household appliance after running the respective drying process can be guaranteed at the desired time in each case. With reference to the last considered cases of laundry to be dried in a drum, this means that, for example, fed anoraks should be dried until the respective Anorakfutter is free of moisture, and that on the other hand at low loading of the laundry drum does not over-dry the laundry received by this, so overdrying is avoided.
Zum einen wird die vorstehend aufgezeigte Aufgabe bei einem Verfahren der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass zusätzlich eine beim Trocknen der Wäsche bei oder nach Erreichen eines vorgegebenen Feuchtigkeitswertes oder eines diesem entsprechenden Messwertes ermittelte, der jeweiligen Wäscheart und/oder dem jeweiligen Beladungszustand der Wäschetrommel entsprechende Temperaturgröße zum gezielten Beenden des Trocknens herangezogen wird.On the one hand, the above-described object is achieved in a method of the type mentioned in the present invention by additionally determining a drying value of the laundry during or after reaching a predetermined moisture value or a corresponding measured value, the respective laundry type and / or the respective loading state of the laundry drum corresponding temperature size is used for targeted termination of drying.
Die Erfindung bringt den Vorteil mit sich, dass auf besonders einfache Weise sichergestellt ist, dass eine von der jeweiligen Wäscheart und -menge abhängige Über- oder Untertrocknung vermieden ist und dass der jeweilige Trocknungsvorgang zum jeweils gewünschten richtigen Zeitpunkt beendet werden kann, also dann, wenn die betreffende Wäsche in gewünschter Weise getrocknet ist. Erreicht wird dies dadurch, dass die erwähnte Temperaturgröße in Korrelation zu einem bestimmten Feuchtigkeitswert oder einem diesem entsprechenden Messwert zusätzlich herangezogen wird.The invention has the advantage that it is ensured in a particularly simple manner that depending on the particular type and amount of laundry over- or under-drying is avoided and that the respective drying process can be ended at the respectively desired right time, so then when the laundry in question is dried in the desired manner. This is achieved by additionally using the mentioned temperature variable in correlation to a specific moisture value or a corresponding measured value.
Die Erfindung geht aus von der Erkenntnis, dass die Temperatur der der Wäschetrommel entströmenden Abluft nach einem anfänglichen, durch die Aufheizung der Wäsche und des Geräts selbst verursachten Anstieg über den Verlauf des Trocknungsprozesses eine nur geringe Veränderung zeigt und gegen Ende des Trocknungsprozesses wieder deutlich ansteigt. Dabei ist unterstellt, dass die Temperatur der Zuluft, die in die Wäschetrommel einströmt, weitgehend konstant gehalten wird, wie es auch geläufiger Praxis entspricht. In einem Fall, in dem eine solche Konstanz nicht gegeben ist, gilt das Gesagte für die Differenz zwischen den Temperaturen der Zuluft und der Abluft. Die geringe Veränderung der Temperatur der Abluft bzw. der Differenz über weite Teile des Trocknungsprozesses lieget daran, dass sich ein Fließgleichgewicht ausbildet, bei dem die Feuchtigkeit von der Oberfläche der Fasern der zu trocknenden Wäsche verdampft und mit der Abluft abgeführt wird. Ist der Trocknungsprozess weit genug fortgeschritten und der überwiegende Teil der Feuchtigkeit aus der Wäsche abgeführt, so liegt an der Oberfläche der zu trocknenden Wäsche nicht mehr ausreichend Feuchtigkeit vor, die verdampft werden könnte, und es kommt zu einem Verdampfen der Feuchtigkeit im Inneren der Fasern. Dabei wird das Fließgleichgewicht gestört; das Verdampfen der Feuchtigkeit im Inneren der Fasern erfordert eine höhere Temperatur, was schließlich zu einer deutlichen Erhöhung der Temperatur der Abluft bzw. einer Verringerung der Differenz führt. Erfindungsgemäß ist erkannt worden, dass diese Temperaturerhöhung mehr oder weniger dann erfolgt, wenn die Feuchtigkeit in der Wäsche bis auf eine einem üblicherweise gewünschten Trocknungsgrad entsprechenden Restfeuchte entzogen ist, und diese Temperaturerhöhung deshalb als guter Indikator zum Beenden des Trocknungsprozesses heranziehbar ist.The invention is based on the finding that the temperature of the exhaust air flowing out of the laundry drum after an initial increase caused by the heating of the laundry and the appliance over the course of the drying process shows only a slight change and increases significantly again towards the end of the drying process. It is assumed that the temperature of the supply air flowing into the laundry drum is kept substantially constant, as it also corresponds to common practice. In a case in which such constancy is not given, what is said applies the difference between the temperatures of the supply air and the exhaust air. The slight change in the temperature of the exhaust air or the difference over large parts of the drying process is due to the fact that a steady state is formed in which the moisture is evaporated from the surface of the fibers of the laundry to be dried and removed with the exhaust air. If the drying process has progressed far enough and most of the moisture has been removed from the laundry, there is no longer sufficient moisture on the surface of the laundry to be dried that could be vaporized, and moisture evaporates inside the fibers. The flow equilibrium is disturbed; the evaporation of moisture inside the fibers requires a higher temperature, which eventually leads to a significant increase in the temperature of the exhaust air or a reduction in the difference. According to the invention, it has been recognized that this temperature increase takes place more or less when the moisture in the laundry is withdrawn to a residual moisture which is usually desired, and this temperature increase can therefore be used as a good indicator for terminating the drying process.
Eine zweckmäßige Weiterbildung der Erfindung besteht darin, die Absolutwerte der Trocknungstemperatur zu bewerten. Dies bringt den Vorteil einer besonders einfachen Messung mit sich. So kann die Temperatur der Abluft am Trommelaustritt des Wäschetrockners vom Beginn der Trocknungsphase an vorzugsweise periodisch gemessen werden. In vorteilhafter Weise werden dabei Schwankungen der Heizung, der Netzspannung, der Beladung der Wäschetrommel, der Umgebungstemperatur sowie der Wartungszustand des Gerätes mit berücksichtigt.An expedient development of the invention is to evaluate the absolute values of the drying temperature. This brings with it the advantage of a particularly simple measurement. Thus, the temperature of the exhaust air at the drum outlet of the tumble dryer from the beginning of the drying phase, preferably be measured periodically. Advantageously, variations in the heating, the mains voltage, the loading of the laundry drum, the ambient temperature and the maintenance status of the device are taken into account.
Gemäß einer anderen zweckmäßigen Ausgestaltung der Erfindung wird der Gradient des Trocknungstemperaturverlaufes bewertet. Dadurch wird der Vorteil erzielt, dass sich der Trockenheitszustand der Wäsche in der Wäschetrommel noch präzisier erfassen lässt.According to another expedient embodiment of the invention, the gradient of the drying temperature profile is evaluated. As a result, the advantage is achieved that the dryness state of the laundry in the laundry drum can be detected even more precisely.
Vorzugsweise werden die Temperaturänderungen der Abluft am Trommelaustritt erfasst, und die zugehörigen Messwerte werden zur Bewertung in einer vorhandenen Steuereinrichtung gespeichert. Diese Istwerte darstellenden Werte können sodann in der betreffenden Steuereinrichtung mit der jeweiligen Wäscheart und/oder dem jeweiligen Beladungszustand der Wäschetrommel entsprechenden vorgegebenen Temperatursollwerten verglichen werden.Preferably, the temperature changes of the exhaust air are detected at the drum outlet, and the associated measured values are stored for evaluation in an existing control device. These values representing actual values can then be compared in the respective control device with the predetermined temperature setpoint values corresponding to the respective type of laundry and / or the respective loading state of the laundry drum.
Zum anderen wird die oben angegebene Aufgabe bei einem Hausgerät zum Trocknen feuchter Wäsche mittels durch eine Heizeinrichtung erzeugter Warmluft, mit einer die Wäsche aufnehmenden Wäschetrommel, die von einem Motor antreibbar ist, der zusammen mit der genannten Heizeinrichtung durch eine Steuereinrichtung steuerbar ist, und mit wenigstens einer Messeinrichtung, die zumindest einen Feuchtigkeitswert oder einen diesem entsprechenden Messwert der zu trocknenden Wäsche für eine Auswertung und Beendigung des jeweiligen Trocknungsvorgangs durch die Steuereinrichtung misst, erfindungsgemäß dadurch gelöst, dass zusätzlich eine Temperatur-Messeinrichtung vorgesehen ist, von der eine beim Trocknen der Wäsche erst bei oder nach Erreichen eines vorgegebenen Feuchtigkeitswertes oder eines diesem entsprechenden Messwertes ermittelte, der jeweiligen Wäscheart und/oder dem jeweiligen Beladungszustand der Wäschetrommel entsprechende Temperaturgröße von der Steuereinrichtung zum gezielten Beenden des Trocknens auswertbar ist.On the other hand, the above object is achieved in a household appliance for drying damp laundry by means of a hot air generated by a heater, with a washing drum receiving the laundry, which is drivable by a motor which is controllable together with said heating means by a control device, and at least a measuring device which measures at least one moisture value or a corresponding measured value of the laundry to be dried for evaluation and termination of the respective drying operation by the control device, according to the invention achieved in that in addition a temperature-measuring device is provided by the one when drying the laundry during or after reaching a predetermined moisture value or a measured value corresponding to this, the respective size of the laundry and / or the respective loading state of the laundry drum corresponding temperature size of the control device for targeted Ending the drying is evaluable.
Dies bringt den Vorteil mit sich, dass mit einem besonders geringen Aufwand ausgekommen werden kann, um in dem das Verfahren gemäß der Erfindung ausführenden Hausgerät das Trocknen feuchter Wäsche so steuern zu können, dass eine von der jeweiligen Wäscheart und -menge abhängige Über- oder Untertrocknung vermieden ist und dass der jeweilige Trocknungsvorgang zum jeweils gewünschten richtigen Zeitpunkt beendet werden kann, also dann, wenn die betreffende Wäsche in gewünschter Weise getrocknet ist. Erreicht wird dies dadurch, dass die erwähnte Temperaturgröße in Korrelation zu einem bestimmten Feuchtigkeitswert oder einem diesem entsprechenden Messwert zusätzlich herangezogen wird. Im Übrigen ist dadurch einfach und sicher verhindert, dass der Wäschetrockner auf Grund einer Fehlmessung der Wäschefeuchtigkeit zu früh abschaltet, indem die erwähnte Temperaturgröße als Hilfsgröße zusätzlich berücksichtigt wird.This has the advantage that can be done with a very low cost to control in the running the method according to the invention household appliance drying the wet laundry so that depending on the particular type and amount of laundry over- or under-drying is avoided and that the respective drying process can be completed at the respectively desired right time, that is, when the laundry in question is dried in the desired manner. This is achieved by additionally using the mentioned temperature variable in correlation to a specific moisture value or a corresponding measured value. Incidentally, this simply and reliably prevents the tumble dryer from switching off too early due to a faulty measurement of the tumble moisture, in that the aforementioned temperature variable is additionally taken into account as an auxiliary variable.
Gemäß einer weiteren zweckmäßigen Ausgestaltung der Erfindung ist als Temperaturgröße der jeweilige Trocknungstemperatur-Absolutwert von der Steuereinrichtung zu verarbeiten. Hierdurch kommt man in vorteilhafter Weise mit einem besonders geringen Messaufwand aus.According to a further expedient embodiment of the invention, the temperature value of the particular drying temperature absolute value is to be processed by the control device. This results in an advantageous manner with a particularly low measurement effort.
Gemäß einer anderen zweckmäßigen Ausgestaltung der Erfindung ist als Temperaturgröße der Gradient eines durch wenigstens zwei Temperaturmesswerte gegebenen Trocknungstemperaturverlaufs von der Steuereinrichtung zu verarbeiten. Damit kann die Steuereinrichtung einen Trocknungsprozess in Abhängigkeit von Temperaturänderungen noch genauer steuern. Nachdem ein geforderter Feuchtigkeitsgrenzwert der Wäsche erreicht ist, steigt nämlich, wie weiter unten noch näher ersichtlich werden wird, der Temperaturverlauf noch kurz an, und lediglich in diesem Bereich wird der Gradient des betreffenden Temperaturverlaufs als Istgröße ermittelt, die mit einer eine Sollgröße darstellenden vorgegebenen Temperatur verglichen werden kann.According to another expedient embodiment of the invention, the temperature variable to be processed by the control device is the gradient of a drying temperature profile given by at least two temperature measured values. This can be the Control device to control a drying process in response to changes in temperature even more accurate. After a required moisture limit value of the laundry is reached, namely, as will be seen below, the temperature curve increases even more, and only in this area, the gradient of the relevant temperature profile is determined as the actual size, with a predetermined size representing predetermined temperature can be compared.
Gemäß einer besonders vorteilhaften Ausgestaltung der Erfindung ist die Temperaturgröße aus Abluft abgeleitet, die aus der Wäschetrommel austritt. Die Temperatur-Messeinrichtung ist insbesondere am Wäschetrommelauslass platziert, und sie funktioniert als Temperatursensor zur Messung der durch einen Abluftkanal austretenden Abluft des Wäschetrockners. Die Messwerte der Ablufttemperatur liefern die Zusatzinformation über den Trockenheitszustand der Wäsche im Wäschetrockner.According to a particularly advantageous embodiment of the invention, the temperature variable is derived from exhaust air emerging from the laundry drum. The temperature measuring device is in particular placed on the laundry drum outlet, and it functions as a temperature sensor for measuring the exhaust air of the clothes dryer exiting through an exhaust air duct. The measured values of the exhaust air temperature provide the additional information about the dryness state of the laundry in the tumble dryer.
Anhand einer Zeichnung wird die Erfindung nachstehend beispielhaft näher erläutert.
- Fig.1
- zeigt in einer schematischen Darstellung den prinzipiellen Aufbau eines Hausgeräts zum Trocknen feuchter Wäsche;
- Fig.2
- zeigt in einem Diagramm den zeitabhängigen Temperatur- und Wäschefeuchtigkeitsverlauf eines Wäschepostens im Zuge seines Trocknens in einem Hausgerät zum Trocknen feuchter Wäsche.
- Fig.1
- shows a schematic representation of the basic structure of a household appliance for drying damp laundry;
- Fig.2
- shows in a diagram the time-dependent temperature and Wäschepeuchtigkeitsverlauf a Wäschepostens in the course of its drying in a household appliance for drying damp laundry.
Bezüglich der Heizeinrichtung bzw. des Heizwiderstandes 5 sei hier noch angemerkt, dass die von dieser bzw. diesem erwärmte Luft mittels eines hier nicht dargestellten, ebenfalls von dem Motor 3 angetriebenen Lüfterflügels in die Wäschetrommel 2 als Warmluftstrom eingeführt wird. Mit diesem Warmluftstrom wird dann in der Wäschetrommel 2 befindliche feuchte Wäsche getrocknet. Der Feuchtigkeit der zu trocknenden Wäsche mit sich führende Warmluftstrom wird dann als Abluft aus dem Wasch- bzw. Wäschetrockner 1 abgeführt.With respect to the heating device or the
In der Wäschetrommel 2 befindet sich eine Widerstands-Messeinrichtung 7 mit zwei in Abstand voneinander vorgesehenen Elektroden 8, 9. Mit dieser Widerstands-Messeinrichtung 7 wird ein dem jeweiligen Feuchtigkeitswert der in der Wäschetrommel 2 befindlichen zu trocknenden Wäsche entsprechender Widerstands-Messwert ermittelt. Bei feuchter Wäsche liegt der Widerstand, der zwischen den beiden Messelektroden 8, 9 zu messen ist, in der Größenordnung von einigen Ohm, und bei trockner Wäsche beträgt der betreffende Widerstands-Messwert bis zu mehreren Megohm. Es sei an dieser Stelle bemerkt, dass grundsätzlich der Feuchtigkeitswert der jeweils in der Wäschetrommel 2 befindlichen Wäsche auch mittels eines Feuchtigkeitsmessers gemessen werden kann; die in
In der Wäschetrommel 2 ist ferner ein Temperatursensor 10 vorgesehen, der eine Temperatur-Messeinrichtung darstellt, mit der, wie weiter unten noch erläutert wird, beispielsweise die Temperatur der aus der Wäschetrommel 2 austretenden Abluft ermittelt wird.In the laundry drum 2, a
Die die beiden Messelektroden 8, 9 umfassende Widerstands-Messeinrichtung 7 ist gemäß
Die genannte Steuereinrichtung 4 ist eingangsseitig noch mit einem Programmwähler 16 verbunden, durch dessen Einstellung beispielsweise unterschiedliche Trocknungsprogramme und damit Laufzeiten des Motors 3 und Heizzeiten bzw. -arten der Heizeinrichtung 5 festgelegt werden können. Mit der betreffenden Einstellung können auch das Trocknen von unterschiedlichen Wäschearten und/oder unterschiedliche Beladungszustände der Wäschetrommel 2 berücksichtigt und entsprechende Sollwerte der Steuereinrichtung 4 für ein gezieltes Abschalten des jeweiligen Trocknungsvorgangs zugeführt werden. In der Steuereinrichtung findet dann ein Sollwert-Istwert-Vergleich zwischen einer jeweils vorgegebenen Sollwert-Temperaturgröße und der jeweils gemessenen Istwert-Temperatur statt, wie dies weiter unten noch näher ersichtlich werden wird.The said
Nachdem zuvor an Hand von
Wie aus dem Diagramm gemäß
Wie aus
Ab dem zuvor erwähnten Schnittpunkt 19 erhöht sich die Temperatur 9 bis zu einem Zeitpunkt von etwa 80 min nur noch um etwa 20°C, während die relative Wäschefeuchtigkeit WF entsprechend dem Feuchtigkeitsverlauf 17 bis zu diesem Zeitpunkt (80 min) auf einige wenige Prozente abgesunken ist und sich nur noch geringfügig verändert.From the
Wie im Zusammenhang mit
Mit der Abgabe des zuvor genannten Binärsignals "1" von der Vergleichereinheit 14 wird die Steuereinrichtung 4 gemäß
Bezüglich dieses Temperaturverlaufes 18 hat sich nämlich gezeigt, dass dieser gegen Ende des Trocknungsprozesses, also wenn die in der Wäsche verbliebene Feuchtigkeit einer üblichen wünschenswerten Restfeuchte entspricht, einen Temperatur-Anstiegsbereich 21 aufweist. Die Ursache dafür ist oben erläutert worden. Dieser Anstieg 21 markiert also einen Zeitbereich, in welchem der Trocknungsprozess abgebrochen werden sollte, und dies mit einer bedeutend größeren Deutlichkeit, als dies unter Auswertung der Wäschefeuchtigkeit 20 möglich wäre. Die genaue Festlegung des Zeitpunktes, zu welchem der Trocknungsprozess nach erfolgtem Nachweis des Anstiegs 21 durch Abschalten der Heizung beendet wird, ist gegebenenfalls in einem Probelauf zu ermitteln und entsprechend festzulegen. Dieser Zeitpunkt ist in
bei unveränderter Heizleistung durch die Heizeinrichtung 5 zeigt.with unchanged heating power by the
Die notwendige Temperaturbewertung erfolgt durch die Steuereinrichtung 4, und zwar durch Ausführen eines Sollwert-Istwert-Vergleichs zwischen einer durch den Programmwähler 16 entsprechend der jeweiligen Wäscheart und/oder dem jeweiligen Beladungszustand der Wäschetrommel 2 eingestellten Sollwert-Temperatur und der durch den Temperatursensor 10 ermittelten Istwert-Temperatur. Dabei wird im einfachsten Fall der Temperaturanstieg 21 festgestellt durch Messen und Bewerten der Temperatur der Abluft, um daraufhin das Trocknen im Wäschetrockner 1 gezielt zu beenden. Es ist aber auch möglich, in dem Temperatur-Anstiegsbereich 21 vielfach wenigstens zwei Messpunkte zu berücksichtigen und auf deren Grundlage den Gradienten des Temperaturverlaufs in der Steuereinrichtung 4 zu bewerten, um das Trocknen in dem Wäsche- bzw. Waschtrockner 1 gezielt zu beenden. Im Falle der Berücksichtigung des Gradienten des Temperaturverlaufs in der Steuereinrichtung 4 kann in dieser durch den Programmwähler 16 ein der jeweiligen Wäscheart und/oder dem jeweiligen Beladungszustand der Wäschetrommel 2 entsprechender Sollwert-Temperaturgradient eingestellt werden. Durch die Berücksichtigung der jeweils ermittelten Istwert-Temperaturgröße bei oder nach Erreichen eines vorgegebenen Feuchtigkeitswertes oder eines diesem entsprechenden Messwertes und durch die Einbeziehung dieser Istwert-Temperaturgröße in den erwähnten Sollwert-Istwert-Vergleich lässt sich somit auf besonders einfache, aber wirksame Weise eine von der jeweiligen Wäscheart abhängige Über- oder Untertrocknung der Wäsche vermeiden.
Claims (4)
- Method for controlling the drying of moist laundry in a laundry drum (2) of a domestic appliance for drying moist laundry (1), in which hot air is generated and in which a drying process is terminated with consideration of at least one moisture value or a measurement value corresponding therewith of the laundry to be dried, wherein in addition utilisation is made, for selective termination of the drying, of a temperature magnitude (21) which is detected during drying of the laundry at or after attainment of the predetermined moisture value or of a measurement value corresponding therewith and which corresponds with the respective kind of laundry and/or with the respective load state of the laundry drum (2), characterised in that a gradient of the drying temperature plot is evaluated as temperature magnitude (21; 22; 23).
- Method according to claim 1, characterised in that the temperature magnitude (21) is detected in exhaust air issuing from the laundry drum (2).
- Domestic appliance for drying moist laundry (1) by means of hot air generated by a heating device (5), with a laundry drum (2), which receives the laundry and which is drivable by a motor (3), which is controlled together with the said heating device (5) by a control device (4), and with at least one measuring device (8, 9, 13) which measures at least one moisture value or a measurement value corresponding therewith of the laundry to be dried for evaluation by the control device (4), wherein in addition a temperature measuring device (10) is provided from which a temperature magnitude (21), which is detected during drying of the laundry only at or after attainment of the predetermined moisture value (20) or a measurement value corresponding therewith and which corresponds with the respective kind of laundry and/or with the respective load state of the laundry drum, can be evaluated by the control device (4) for selective termination of the drying, characterised in that a gradient of a drying temperature plot, which is given by at least two temperature measurement values, is to be processed by the control device (4) as temperature magnitude (21).
- Domestic appliance according to claim 3, characterised in that the temperature measuring device (10) is arranged for measuring the temperature magnitude (21) in exhaust air issuing from the laundry drum (2).
Priority Applications (1)
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PL07787370T PL2052106T3 (en) | 2006-08-09 | 2007-07-11 | Method and household appliance for drying wet laundry |
Applications Claiming Priority (2)
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DE102006037239A DE102006037239A1 (en) | 2006-08-09 | 2006-08-09 | Method and tumble dryer for controlling the drying of wet laundry |
PCT/EP2007/057096 WO2008017565A1 (en) | 2006-08-09 | 2007-07-11 | Method and household appliance for drying wet laundry |
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EP2052106B1 true EP2052106B1 (en) | 2013-07-03 |
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EP (1) | EP2052106B1 (en) |
KR (1) | KR20090036577A (en) |
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DE4447270A1 (en) * | 1994-12-30 | 1996-07-04 | Bosch Siemens Hausgeraete | Method for controlling drying processes in household clothes dryers |
JPH10279376A (en) * | 1997-03-31 | 1998-10-20 | Toyo Tanso Kk | Member for continuous casting using carbon-silicon carbide composite material |
DE19719661C2 (en) * | 1997-05-09 | 2002-09-12 | Miele & Cie | Process for controlling the residual moisture content of the laundry in a program-controlled clothes dryer |
DE19725536C2 (en) * | 1997-06-17 | 2000-06-15 | Miele & Cie | Process for controlling the heating power of a clothes dryer |
DE19728197A1 (en) * | 1997-07-02 | 1999-01-07 | Bosch Siemens Hausgeraete | Method for detecting inadmissible operating states in a clothes dryer and clothes dryer with such a detection method |
FR2772898B1 (en) * | 1997-12-19 | 2000-03-17 | Esswein Sa | METHOD FOR DETERMINING THE EVOLUTION OF DRYING IN A DRYING PROCESS, AND IMPLEMENTING MACHINE |
DE19842644A1 (en) * | 1998-09-17 | 2000-03-23 | Bsh Bosch Siemens Hausgeraete | Domestic laundry drying appliance has sensors to monitor the air flow temps to vary the power supply to the air heater to control its heating action |
DE19939273A1 (en) * | 1999-08-19 | 2001-02-22 | Bsh Bosch Siemens Hausgeraete | Determining drying time for washer dyer with moisture-controlled drying programme involves measuring at least two mutually independent parameters as soon as possible after starting |
KR20020062446A (en) * | 2001-01-20 | 2002-07-26 | 엘지전자주식회사 | The apparatus and the method for sensing drying degree for exhaust type dryer |
DE10103905A1 (en) * | 2001-01-30 | 2002-08-01 | T E M Technologische Entwicklu | Hygienic drying of laundry using ozonizers |
DE10200975C2 (en) * | 2001-03-02 | 2003-08-28 | Whirlpool Co | Procedure for changing the program sequence for a household clothes dryer |
DE10134971A1 (en) * | 2001-07-24 | 2003-02-06 | Kannegiesser H Gmbh Co | Process for drying laundry |
DE10162923A1 (en) * | 2001-12-20 | 2003-07-03 | Bsh Bosch Siemens Hausgeraete | Method and device for drying textiles |
US7005618B2 (en) * | 2003-06-27 | 2006-02-28 | General Electric Company | Clothes dryer apparatus and method |
US20050132599A1 (en) * | 2003-12-18 | 2005-06-23 | Lg Electronics Inc. | Drying method of washing machine and apparatus thereof |
-
2006
- 2006-08-09 DE DE102006037239A patent/DE102006037239A1/en not_active Withdrawn
-
2007
- 2007-07-11 EA EA200970183A patent/EA012994B1/en not_active IP Right Cessation
- 2007-07-11 KR KR1020097002475A patent/KR20090036577A/en not_active Application Discontinuation
- 2007-07-11 US US12/309,995 patent/US20090313848A1/en not_active Abandoned
- 2007-07-11 WO PCT/EP2007/057096 patent/WO2008017565A1/en active Application Filing
- 2007-07-11 CN CN2007800296441A patent/CN101501266B/en active Active
- 2007-07-11 EP EP07787370.1A patent/EP2052106B1/en not_active Revoked
- 2007-07-11 PL PL07787370T patent/PL2052106T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
PL2052106T3 (en) | 2013-12-31 |
CN101501266B (en) | 2013-01-09 |
WO2008017565A1 (en) | 2008-02-14 |
EA012994B1 (en) | 2010-02-26 |
EP2052106A1 (en) | 2009-04-29 |
EA200970183A1 (en) | 2009-10-30 |
KR20090036577A (en) | 2009-04-14 |
US20090313848A1 (en) | 2009-12-24 |
CN101501266A (en) | 2009-08-05 |
DE102006037239A1 (en) | 2008-02-14 |
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