DE4432055A1 - Method for determining the duration of a drying operation - Google Patents
Method for determining the duration of a drying operationInfo
- Publication number
- DE4432055A1 DE4432055A1 DE4432055A DE4432055A DE4432055A1 DE 4432055 A1 DE4432055 A1 DE 4432055A1 DE 4432055 A DE4432055 A DE 4432055A DE 4432055 A DE4432055 A DE 4432055A DE 4432055 A1 DE4432055 A1 DE 4432055A1
- Authority
- DE
- Germany
- Prior art keywords
- drying process
- duration
- determining
- value
- procedure
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
-
- 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
- D06F58/46—Control of the operating time
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
-
- 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
- D06F2103/10—Humidity expressed as capacitance or resistance
-
- 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
- D06F2103/38—Time, e.g. duration
-
- 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
- D06F2103/44—Current or voltage
-
- 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
- D06F2105/58—Indications or alarms to the control system or to the user
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Ermittlung der Dauer eines Trocknungsvor gangs in einem programmgesteuerten Wäschetrockner mit einer elektronischen Programmsteuerung.The invention relates to a method for determining the duration of a drying before gangs in a program-controlled clothes dryer with an electronic Program control.
Aus der DE-PS 30 30 864 ist bereits ein Verfahren zum automatischen Steuern des Trocknungsvorgangs bis zum Erreichen eines gewünschten Trockengrades bekannt, bei dem der Gradient der ansteigenden Temperatur während einer frühen Phase des Trocknungsvorgangs ermittelt wird und in Abhängigkeit von diesem die erforderliche Betriebsdauer errechnet wird. Bei einem derartigen Verfahren wird es als besonders nachteilig empfunden, daß bei der Ermittlung der Aufheiz geschwindigkeit die Temperaturdifferenz zwischen Wäschetrocknungssystem und Umgebungsluft berücksichtigt werden muß, um ein repräsentatives Meßergebnis für die erforderliche Betriebsdauer zu erhalten. Beschränkt man sich bei den vor gegebenen Verfahren allein auf die Ermittlung der Aufheizgeschwindigkeit, werden Umgebungseinflüsse, wie z. B. die Anfangstemperatur der Wäsche, die Anfangs temperatur des Wäschetrocknungssystems und die Umgebungstemperatur nicht berücksichtigt, so daß der Programmsteuereinrichtung ein ungenauer Zeitwert für die erforderliche Betriebsdauer vorgegeben wird. Ein ungenauer Wert wird außer dem auch bei Netzspannungsschwankungen ermittelt, da die Aufheizgeschwin digkeit von Heizleistung abhängig ist und die Netzspannung quadratisch in die Heizleistung eingeht. Ein weiterer Nachteil besteht darin, daß durch die Aufheizzeit eine relativ späte Erstanzeige (nach 10 min) erfolgt.From DE-PS 30 30 864 is already a method for automatic control the drying process until a desired degree of dryness is reached known in which the gradient of the rising temperature during an early Phase of the drying process is determined and depending on this the required operating time is calculated. With such a method it will found to be particularly disadvantageous that when determining the heating speed the temperature difference between the laundry drying system and Ambient air must be considered to get a representative measurement result for the required operating time. One restricts oneself with the given methods solely on the determination of the heating rate Environmental influences, such as B. the initial temperature of the laundry, the initial temperature of the laundry drying system and the ambient temperature is not is taken into account, so that the program control device has an inaccurate time value for the required operating time is specified. An inaccurate value will be excluded which is also determined in the event of mains voltage fluctuations, since the heating-up speed is dependent on heating power and the mains voltage squared into the Heating output is received. Another disadvantage is that Warm-up time there is a relatively late initial display (after 10 min).
Um diesen Nachteil zu vermeiden, ist es aus der DE-OS 40 13 543 bekannt, die restliche Dauer eines Trocknungsvorgangs nach Erreichen einer vorgegebenen Solltemperatur in Abhängigkeit von der Abkühlgeschwindigkeit im Trocknungssy stem zu ermitteln. Hierbei besteht der Nachteil, daß die Anzeige der Dauer erst zu einem relativ späten Zeitpunkt erfolgt und nicht sofort nach dem Einschalten des Gerätes. To avoid this disadvantage, it is known from DE-OS 40 13 543, the remaining duration of a drying process after reaching a predetermined one Target temperature depending on the cooling rate in the drying system stem to be determined. The disadvantage here is that the duration is only displayed a relatively late point in time and not immediately after switching on the Device.
Der Erfindung stellt sich somit das Problem, ein möglichst genaues Verfahren zur Ermittlung der Dauer eines Trockenvorgangs in einem programmgesteuerten Wä schetrockner zu schaffen, bei dem die Anzeige schnell nach der Inbetriebnahme erfolgt.The invention therefore presents the problem of a method that is as accurate as possible Determination of the duration of a drying process in a program-controlled laundry to create a dryer that will display quickly after commissioning he follows.
Erfindungsgemäß wird dieses Problem durch ein Verfahren gelöst, bei dem der Widerstand der zu trocknenden Wäsche unter Verwendung einer an sich bekann ten Vorrichtung zur Messung des Restfeuchtegehalts zu einem frühen Zeitpunkt des Trocknungsvorgangs ermittelt und in Abhängigkeit von dem ermittelten Wi derstandswert ein in einem nichtflüchtigen Speicher abgelegter Zeitwert in einer Anzeigevorrichtung signalisiert wird.According to the invention this problem is solved by a method in which the Resistance of laundry to be dried using one known per se device for measuring the residual moisture content at an early stage of the drying process determined and depending on the determined Wi the current value is a time value stored in a non-volatile memory in a Display device is signaled.
Der mit der Erfindung erreichbare Vorteil besteht insbesondere darin, daß bei die sem Verfahren eine bereits im Trockner installierte Vorrichtung zur Messung des Restfeuchtegehalts verwendet wird, so daß keine zusätzlichen Meßvorrichtungen erforderlich sind. Daneben liegt der Vorteil in der frühen und trotzdem genauen Anzeige der Dauer des Trocknungsvorgangs. Die Messung des elektrischen Wi derstandes kann ca. 1 Minute nach dem Einschalten des Wäschetrockners vorge nommen werden, anschließend erfolgt sofort die Anzeige des Zeitwerts für die Dauer des Programms.The advantage achievable with the invention is, in particular, that the This method a device already installed in the dryer for measuring the Residual moisture content is used, so that no additional measuring devices required are. In addition, the advantage lies in the early, yet precise Displays the duration of the drying process. Measurement of the electrical Wi This can be done approx. 1 minute after switching on the tumble dryer are taken, then the time value for the Duration of the program.
Es hat sich als vorteilhaft erwiesen, daß der angezeigte Zeitwert in Abhängigkeit von der Trocknungsdauer korrigiert wird. Dies kann insbesondere dadurch erfol gen, daß eine für den jeweiligen Trocknungsvorgang gemessene Laufzeit mit dem abgespeicherten Zeitwert verglichen und der abgespeicherte Zeitwert in Abhän gigkeit von der gemessenen Laufzeit korrigiert wird. Hierdurch besitzt das Verfah ren eine "Lernfähigkeit" und stellt sich auf unterschiedliche Umgebungsbedingun gen, beispielsweise verschiedene Wasser-Leitwerte ein.It has proven to be advantageous that the displayed time value is dependent on is corrected by the drying time. This can be done in particular conditions that a running time measured for the respective drying process with the stored time value compared and the stored time value in dependency corrected from the measured transit time. As a result, the procedure ren a "learning ability" and adapts to different environmental conditions conditions, for example different water conductance values.
Eine andere vorteilhafte Ausführungsform ist dadurch gekennzeichnet, daß der angezeigte Zeitwert in Abhängigkeit vom Minimum des von der Vorrichtung zur Restfeuchteerfassung abgegebenen Signals korrigiert wird.Another advantageous embodiment is characterized in that the displayed time value depending on the minimum of the device Residual moisture detection output signal is corrected.
Hierbei wird der Umstand ausgenutzt daß zunächst durch die Erwärmung des in der Wäsche enthaltenen Wassers eine Erhöhung des Leitwerts erfolgt. Mit steigender Erwärmung der Wäsche erfolgt durch deren Trocknung eine Abnahme der Feuchtigkeit, wodurch der Leitwert wieder sinkt. Demnach durchschreitet das vom Wäschewiderstand abhängige Signal ein Minimum, dessen Höhe von der Beladung der Trommel und der Temperatur der Trocknungsluft abhängig ist. Da diese beiden Faktoren auch für die Dauer des Trockenvorgangs ausschlaggebend sind, ist nach dem Durchschreiten des Minimums des Restfeuchtesignals eine Korrektur des angezeigten Zeitwerts möglich.Here the fact is exploited that initially by heating the in the water contained in the laundry increases the conductivity. With increasing warming of the laundry results in a decrease as it dries moisture, which reduces the conductivity again. Accordingly, it passes through signal dependent on the laundry resistance a minimum, the level of which Loading of the drum and the temperature of the drying air. There these two factors are also decisive for the duration of the drying process after passing the minimum of the residual moisture signal is one Correction of the displayed time value possible.
Es hat sich weiterhin als vorteilhaft erwiesen, daß vor der Ermittlung des Zeit werts der gemessene Widerstandswert mit einem Referenzwert verglichen wird, und daß bei Überschreiten des Referenzwertes die Anzeige einer Unterbeladung bzw. eines Leerbetriebs erfolgt und/oder das Trocknungsprogramm abgebrochen wird. Da bei starker Unterbeladung oder bei Leerbetrieb sehr große Widerstands werte gemessen werden, führen diese zu Fehlanzeigen und zur Verfälschung des oben beschriebenen Lernprozesses. Dies kann durch die vorgenannte Messung und den Abbruch des Verfahrens zur Ermittlung der Dauer des Trocknungsvor gangs verhindert werden.It has also proven advantageous that before the time is determined the measured resistance value is compared with a reference value, and that when the reference value is exceeded, the display of an underload or an empty operation and / or the drying program is interrupted becomes. Because there is a lot of resistance when the vehicle is heavily underloaded or idle values are measured, this leads to false indications and falsification of the learning process described above. This can be done by the aforementioned measurement and the termination of the procedure for determining the duration of the drying pre can be prevented.
Eine solches Verfahren zur Anzeige und/oder Verhinderung eines unwirtschaftli chen Betriebs kann auch in Trocknern ohne Anzeige der Dauer des Programms als Sicherheitskontrolle durchgeführt werden. Der Referenzwert beträgt dabei ein Vielfaches, insbesondere das 2- bis 5fache, des Widerstandswertes von bügel feuchter Wäsche. Durch ein solches Verfahren ist ein umweltschonender, energiesparender Betrieb möglich.Such a method for displaying and / or preventing an uneconomical Chen operation can also be performed in dryers without displaying the duration of the program Security check to be carried out. The reference value is one Many times, especially 2 to 5 times, the resistance value of bracket damp laundry. Such a process is an environmentally friendly, energy-saving operation possible.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4432055A DE4432055C2 (en) | 1993-09-15 | 1994-09-09 | Procedure for determining the duration of a drying process |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4331295 | 1993-09-15 | ||
DE4432055A DE4432055C2 (en) | 1993-09-15 | 1994-09-09 | Procedure for determining the duration of a drying process |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4432055A1 true DE4432055A1 (en) | 1995-03-16 |
DE4432055C2 DE4432055C2 (en) | 1999-07-01 |
Family
ID=6497764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4432055A Expired - Fee Related DE4432055C2 (en) | 1993-09-15 | 1994-09-09 | Procedure for determining the duration of a drying process |
Country Status (1)
Country | Link |
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DE (1) | DE4432055C2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2734067A1 (en) * | 1995-05-10 | 1996-11-15 | Eastman Kodak Co | APPARATUS AND METHOD FOR DRYING PHOTOSENSITIVE MATERIAL |
EP1048996A1 (en) * | 1999-04-26 | 2000-11-02 | BSH Bosch und Siemens Hausgeräte GmbH | Method for estimating load and drying duration in household laundry driers before the drying process run |
WO2009056443A1 (en) * | 2007-10-31 | 2009-05-07 | BSH Bosch und Siemens Hausgeräte GmbH | Method for determining the switch-off moment of a care process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10134971A1 (en) * | 2001-07-24 | 2003-02-06 | Kannegiesser H Gmbh Co | Process for drying laundry |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2806150A1 (en) * | 1978-02-14 | 1979-08-16 | Bauknecht Gmbh G | PROGRAM CONTROL DEVICE |
DE2817750A1 (en) * | 1978-04-22 | 1979-10-31 | Miele & Cie | Operation of linen dryer controlled by humidity detector - with energising of measuring electrodes delayed pending satisfactory running |
DE3150617A1 (en) * | 1980-12-30 | 1982-07-08 | Etablissements Carpano & Pons, 74302 Cluses, Haute-Savoie | CONTROL ARRANGEMENT FOR A LAUNDRY DRYER |
DE3030864C2 (en) * | 1980-08-14 | 1985-04-25 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Method for automatically controlling the drying process in a laundry drying system and device for carrying out the method |
DE3417482A1 (en) * | 1984-05-11 | 1985-11-14 | Miele & Cie GmbH & Co, 4830 Gütersloh | METHOD FOR REMAINING HUMIDITY OF A LAUNDRY DRYER |
DE3440038A1 (en) * | 1984-11-02 | 1986-05-07 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Control arrangement for a laundry dryer working on the drum principle |
DE3832807A1 (en) * | 1988-09-28 | 1990-03-29 | Miele & Cie | Method for controlling the residual moisture content of the laundry in a drier |
DE4013543A1 (en) * | 1990-04-27 | 1991-10-31 | Miele & Cie | Registering residual running time of drying process - in program-controlled laundry dryer by switching off heating source for short time |
DE4121015A1 (en) * | 1991-06-26 | 1993-01-14 | Licentia Gmbh | Program-controlled laundry dryer, enabling preselection of ending time - by registering parameters by measuring installations evaluated by microprocessor to subsequently control drying cycle |
-
1994
- 1994-09-09 DE DE4432055A patent/DE4432055C2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2806150A1 (en) * | 1978-02-14 | 1979-08-16 | Bauknecht Gmbh G | PROGRAM CONTROL DEVICE |
DE2817750A1 (en) * | 1978-04-22 | 1979-10-31 | Miele & Cie | Operation of linen dryer controlled by humidity detector - with energising of measuring electrodes delayed pending satisfactory running |
DE3030864C2 (en) * | 1980-08-14 | 1985-04-25 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Method for automatically controlling the drying process in a laundry drying system and device for carrying out the method |
DE3150617A1 (en) * | 1980-12-30 | 1982-07-08 | Etablissements Carpano & Pons, 74302 Cluses, Haute-Savoie | CONTROL ARRANGEMENT FOR A LAUNDRY DRYER |
DE3417482A1 (en) * | 1984-05-11 | 1985-11-14 | Miele & Cie GmbH & Co, 4830 Gütersloh | METHOD FOR REMAINING HUMIDITY OF A LAUNDRY DRYER |
DE3440038A1 (en) * | 1984-11-02 | 1986-05-07 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Control arrangement for a laundry dryer working on the drum principle |
DE3832807A1 (en) * | 1988-09-28 | 1990-03-29 | Miele & Cie | Method for controlling the residual moisture content of the laundry in a drier |
DE4013543A1 (en) * | 1990-04-27 | 1991-10-31 | Miele & Cie | Registering residual running time of drying process - in program-controlled laundry dryer by switching off heating source for short time |
DE4121015A1 (en) * | 1991-06-26 | 1993-01-14 | Licentia Gmbh | Program-controlled laundry dryer, enabling preselection of ending time - by registering parameters by measuring installations evaluated by microprocessor to subsequently control drying cycle |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2734067A1 (en) * | 1995-05-10 | 1996-11-15 | Eastman Kodak Co | APPARATUS AND METHOD FOR DRYING PHOTOSENSITIVE MATERIAL |
EP1048996A1 (en) * | 1999-04-26 | 2000-11-02 | BSH Bosch und Siemens Hausgeräte GmbH | Method for estimating load and drying duration in household laundry driers before the drying process run |
WO2009056443A1 (en) * | 2007-10-31 | 2009-05-07 | BSH Bosch und Siemens Hausgeräte GmbH | Method for determining the switch-off moment of a care process |
CN102409509A (en) * | 2007-10-31 | 2012-04-11 | Bsh博世和西门子家用器具有限公司 | Method for determining the switch-off moment of a care process |
CN101842532B (en) * | 2007-10-31 | 2012-04-25 | Bsh博世和西门子家用器具有限公司 | Method for determining the switch-off moment of a care process |
EA017959B1 (en) * | 2007-10-31 | 2013-04-30 | Бсх Бош Унд Сименс Хаусгерете Гмбх | Method for determining the switch-off moment of a care process |
Also Published As
Publication number | Publication date |
---|---|
DE4432055C2 (en) | 1999-07-01 |
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8120 | Willingness to grant licences paragraph 23 | ||
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: MIELE & CIE. KG, 33332 GUETERSLOH, DE |
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8339 | Ceased/non-payment of the annual fee |