EP1945849B1 - Trockner - Google Patents

Trockner Download PDF

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Publication number
EP1945849B1
EP1945849B1 EP06809630A EP06809630A EP1945849B1 EP 1945849 B1 EP1945849 B1 EP 1945849B1 EP 06809630 A EP06809630 A EP 06809630A EP 06809630 A EP06809630 A EP 06809630A EP 1945849 B1 EP1945849 B1 EP 1945849B1
Authority
EP
European Patent Office
Prior art keywords
pressure
dryer
pressure sensor
control card
time
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.)
Not-in-force
Application number
EP06809630A
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English (en)
French (fr)
Other versions
EP1945849A1 (de
Inventor
Murat Goktas
Arif Ozarslan
Hakan Ozkahraman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcelik AS
Original Assignee
Arcelik AS
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Filing date
Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Publication of EP1945849A1 publication Critical patent/EP1945849A1/de
Application granted granted Critical
Publication of EP1945849B1 publication Critical patent/EP1945849B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers
    • 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
    • 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
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2103/30—Pressure
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • D06F58/08—Driving arrangements

Definitions

  • the present invention relates to a dryer wherein the malfunctions that occur during the drying process are identified.
  • the malfunctions of the dryers such as blockage of the filter, obstruction of the air passageway, the motor not rotating, the fan being dislocated from the motor crank, breaking up of the belt, dislocation of the belt, loosening of the belt and scraping of the drum or load related errors such as excess loading or insufficient loading of the laundry in the dryer result in a decrease in the drying performance and damaging of the laundry.
  • various methods are employed to detect these malfunctions. The user is warned of the malfunctions that are identified by means of the sensors situated in the drum or in the air passageway that detect the changes in the parameters such as pressure or temperature and by measurement devices or similar means that control the operation of the drum motor.
  • sensors that control the parameters of the drying process are utilized in a laundry dryer and the pressure sensor detects the interruption of the dry air entering the drying chamber. Furthermore, the parameters detected by the pressure sensor are utilized in obtaining the optimum drying results, the amount of the dry air/circulating air is adjusted by a separating means according to the detected parameters.
  • the stuffed condition of the lint filter is detected by a pressure sensor utilized in the dryer.
  • a dryer according to the preamble of claim 1 is known for example from EP-A-1 568 817 .
  • the aim of the present invention is the realization of a dryer wherein the malfunctions that occur during the drying process can be detected correctly and on time.
  • the laundry is emplaced in a drum rotated by a belt that is actuated by means of a motor and the fan that is rotated by the same motor activates the drying air in the circulation channel to be passed over the laundry.
  • the pressure variations of the drying air with respect to time in the circulation channel is monitored by a pressure sensor situated in the circulation channel and the malfunctions that might arise in the drying process such as the snapping or detaching of the belt, blockage of the filter, blockage of the air circulation channel, the motor or the fan not rotating, excess load or insufficient load are detected by means of the monitored pressure characteristics.
  • the pressure values measured by the pressure sensor for detecting malfunctions are compared to the predetermined data recorded by the producer including pressure-time curves that can be observed when probable malfunctions occur in the drying process and the pressure-time curves recorded for a normal drying process.
  • Figure 1 - is the schematic view of dryer.
  • Figures 2 to 11 - are the pressure-time graphs showing changes of the pressure in the air circulation channel with respect to time.
  • the dryer (1) comprises a drum (2) inside which the load (L) namely the laundry to be dried is emplaced, a motor (3) that actuates the drum (2) to provide its rotation, a transmission means (4) that transmits the motion of the motor (3) to the drum (2), an air outlet (5) situated in front of the drum (2) through which the drying cycle air is discharged, and an air inlet (6) situated on the rear side of the drum (2) into which the dehumidified and heated air is redelivered to the drum (2), a circulation channel (7) in which the drying cycle air circulates, a fan (8) providing the circulation of the air in the drying cycle, a filter (9) providing to remove the fibers from the drying air, a pressure sensor (10) that detects the pressure (P) of the drying air in the circulation channel (7), and a control card (11) that evaluates the data received from the pressure sensor (10).
  • control card (11) compares the curve of the drying air pressure (P) value variations with respect to time (t), measured by the pressure sensor (10), to the probable pressure (P) - time (t) curves formed when possible malfunctions occur in the drying process, as predetermined, recorded by the producer, to decide on which type of a malfunction has occurred.
  • the malfunctions that can occur in the dryer (1) during the drying process are the malfunctioning of the transmission means (4), for example the breaking, dislocation or loosening of the belt rotating the drum (2), blockage of the filter (9), blockage of the air inlet (6) or the air outlet (5) by the load (L), the motor (3) or the fan (8) not rotating, excess load (L), insufficient load (L), dry load (L) or absence of load (L) and the control card (11) determines which of these malfunctions has occurred.
  • the pressure (P) characteristic of the drying air in the circulation channel (7) is detected as regular pressure oscillations around a nominal pressure value (Pn) by the pressure sensor (10) as a result of the air with a certain pressure (P) being circulated by the fan (8) in the air circulation channel (7), the drum (2) rotating to move the load (L) and the airflow being partly hindered at certain time intervals by the load (L) moving in between the air inlet (6) and the air outlet (5) ( Figure 2 ).
  • the curve of the drying air pressure (P) value variations with respect to time (t) in the circulation channel (7) measured by the pressure sensor (10) is compared to the pressure (P) -time (t) curve ( Figure 2 ) of a prerecorded normal drying process by the control card (11) to determine whether there is a malfunction or not, then by comparing to the pressure (P) - time (t) curves of probable malfunctions, the decision is given for what type of malfunction has occurred.
  • the curve of the drying air pressure (P) value variations with respect to time (t) in the circulation channel (7) measured by the pressure sensor (10) is first compared to the pressure (P) -time (t) curve of the most probable malfunctions, thus identifying the malfunction takes less time.
  • the comparison of the pressure (P) value variations with respect to time (t) measured by the pressure sensor (10) to the prerecorded pressure (P) -time (t) curves is carried out by the control card (11) at certain time intervals during the drying cycle and when a malfunction is detected the user is warned according to the type of the malfunction.
  • the control card (11) decides that the transmission means (4) is not functioning, that e.g. the belt is broken or dislocated ( Figure 3 ).
  • the transmission means (4) is out of order, the motor (3) and the fan (8) continues to operate, carrying on the air flow in the circulation channel (7) but since the drum (2) has stopped and hence the load (L) in the drum (2) does not move, an un-oscillated pressure (P) characteristic with a nearly constant value is observed.
  • the control card (11) decides that the transmission means (4) does not rotate the drum (2) from time to time, e.g. the belt is loosened and functions partly ( Figure 4 ).
  • the transmission means (4) rotates the drum (2) irregularly, the air flow continues in the drum (2) since the motor (3) and the fan (8) continue functioning regularly, however since the load (L) moves irregularly, a pressure (P) characteristic composed of irregular oscillations is observed.
  • the control card (11) decides the blockage of the filter (9) ( Figure 5 ). In this case, the fan (8) continues to deliver air into the drum (2) but the blockage of the filter (8) by the fibers cause the pressure (P) to increase.
  • the pressure sensor (10) can be positioned before or after the filter (9) in the dryer (1) in the direction of the air flow.
  • the control card (11) decides that the load (L) is stuck in the air outlet (5) or the air inlet (6) and obstructs the air flow ( Figure 6 ). In this case, the fan (8) continues to deliver air but the load (L) obstructing the air flow path causes the nominal pressure (Pn) to increase suddenly.
  • the control card (11) decides that the fan (8) is not functioning due to dislocation or break-up, or that the motor (3) is not rotating ( Figure 7 ).
  • the control card (11) decides that the amount of the load (L) in the drum (2) is insufficient ( Figure 8 ).
  • the insufficient amount of load (L) emplaced in the drum (2) tends to be swung as a bundle, blocking and opening the air passage as a bundle, causing the detected oscillation amplitude of the pressure (P) to be high.
  • the control card (11) decides that the load (L) in the drum (2) is dry ( Figure 9 ). Since the dry load (L) blocks the air flow less than the wet laundry, the amplitude of the pressure (P) decreases and the nominal pressure (Pn) is detected to decrease a little.
  • drying air pressure (P) values measured by the pressure sensor (10) are always above the nominal pressure (Pn) and low oscillation amplitude is detected, then the control card (11) decides that there is excess load (L) in the drum (2) ( Figure 10 ). Since excess load (L) blocks the air flow more than the normal load (L), the pressure (P) increases and its amplitude decreases.
  • the control card (11) decides that there is no load (L) in the drum (2) ( Figure 11 ). When there is no load (L), the air in the drum (2) continues flowing with an almost constant pressure (P) and pressure (P) oscillation cannot be detected since there is no load (L) barrier in its way.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Claims (14)

  1. Trockner (1), umfassend eine Trommel (2), in die die Wäsche gelegt wird, einen Motor (3), der die Trommel (2) betätigt, um Drehung bereitzustellen, ein Übertragungsmittel (4), das die Bewegung des Motors (3) auf die Trommel (2) überträgt, einen Zirkulationskanal (7), in dem die die Luft des Trockenzykluses zirkuliert, einen Luftauslass (5) und einen Lufteinlass (6), ein Gebläse (8), das für das Zirkulieren der Luft des Trockenzykluses sorgt, einen Filter (9), der dafür sorgt, dass die Fasern aus der Trockenluft entfernt werden, einen Drucksensor (10), der den Druck (P) der Trockenluft im Zirkulationskanal (7) erkennt, und gekennzeichnet durch eine Steuerkarte (11), die die Variationen der Oszillationsamplituden in der Kurve des Trockenluftdrucks (P) in Bezug auf Zeit (t), die vom Drucksensor (10) gemessen werden, mit den möglichen Druck-(P)-Zeit-(t)-Kurven vergleicht, die gebildet werden, wenn mögliche Fehlfunktionen im Trockenvorgang auftreten, und die vom Hersteller im Voraus bestimmt und aufgezeichnet werden, um festzustellen, welche Art von Fehlfunktion aufgetreten ist.
  2. Trockner (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Steuerkarte (11) anhand der Variationen der Oszillationsamplituden in der Kurve des Trockenluftdrucks (P) in Bezug auf Zeit (t), die vom Drucksensor (10) gemessen werden, ermittelt dessen Fehlfunktionen wie z. B. ein gestörtes Übertragungsmittel (4), eine Verstopfung des Filters (9), eine Verstopfung des Lufteinlasses (6) oder des Luftauslasses (5) durch die Beladung (L), nicht drehende Motor (3) oder Gebläse (8), übermäßige Beladung (L), unzureichende Beladung (L), trockene Beladung (L) oder die Abwesenheit von Beladung (L).
  3. Trockner (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Steuerkarte (11) die Kurve der Variationen der Werte des Trockenluftdrucks (P) der Oszillationsamplituden in Bezug auf Zeit (t), die vom Drucksensor (10) gemessen werden, zuerst mit den Druck-(P)-Zeit-(t)-Kurven der wahrscheinlichsten Fehlfunktionen vergleicht und die Art der Fehlfunktion in kurzer Zeit ermittelt.
  4. Trockner nach Anspruch 1, dadurch gekennzeichnet, dass die Steuerkarte (11) die Kurve der Variationen der Werte des Trockenluftdrucks (P) der Oszillationsamplituden in Bezug auf Zeit (t), die vom Drucksensor (10) gemessen werden, mit der im Voraus aufgezeichneten Druck-(P)-Zeit-(t)-Kurve eines normalen Trockenvorgangs vergleicht, um zu ermitteln, ob eine Fehlfunktion aufgetreten ist, und anschließend die Art der Fehlfunktion feststellt, indem sie einen Vergleich mit den Druck-(P)-Zeit-(t)-Kurven der möglichen Fehlfunktionen durchführt.
  5. Trockner (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Steuerkarte (11) die Kurve der Variationen der Werte des Trockenluftdrucks (P) der Oszillationsamplituden in Bezug auf Zeit (t), die vom Drucksensor (10) gemessen werden, in bestimmten Intervallen während des Trockenzyklus mit den Druck-(P)-Zeit-(t)-Kurven der vergleicht und den Benutzer je nach der Art der erkannten Fehlfunktion warnt, wenn eine Fehlfunktion erkannt wird.
  6. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) bestimmt, dass das Übertragungsmittel (4) gestört ist, wenn die Oszillationsamplitude der Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, plötzlich abfallen und dann auf einem konstanten Wert um den Nenndruck (Pn) herum bleiben, ohne dass Oszillationen erkannt werden.
  7. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) von Zeit zu Zeit bestimmt, dass das Übertragungsmittel (4) die Trommel (2) nicht dreht, wenn erkannt wird, dass die Oszillationsamplitude der Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, unregelmäßig abnehmen und sich die Werte des Luftdrucks (P) dem Nenndruck (Pn) annähern.
  8. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) bestimmt, dass die Verstopfung des Filters (9) vorliegt, wenn erkannt wird, dass die Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, inkrementell gegenüber dem Nenndruck (Pn) ansteigen und sich einem Hochdruckwert (P) annähern, während die Oszillationsamplitude abnimmt.
  9. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) bestimmt, dass die Beladung (L) im Luftauslass (5) oder im Lufteinlass (6) festsitzt und den Luftstrom behindert, wenn erkannt wird, dass die Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, plötzlich gegenüber dem Nenndruck (Pn) ansteigen und sich einem Hochdruckwert (P) annähern, während die Oszillationsamplitude abnimmt.
  10. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) bestimmt, dass das Gebläse (8) aufgrund einer Verschiebung oder eines Defekts gestört ist oder dass sich der Motor (3) nicht dreht, wenn erkannt wird, dass sich die Oszillationsamplituden der Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, Null annähern.
  11. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) bestimmt, dass die Beladung (L) der Trommel (2) unzureichend ist, wenn erkannt wird, dass die Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, im Vergleich zu normalen Bedingungen hohe Amplitudenoszillationen aufweisen.
  12. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) bestimmt, dass die Beladung (L) der Trommel (2) trocken ist, wenn erkannt wird, dass die Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, gegenüber dem Nenndruck (Pn) abnehmen und die Oszillationsamplitude abnimmt.
  13. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) bestimmt, dass eine übermäßige Beladung (L) der Trommel (2) vorliegt, wenn erkannt wird, dass die Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, stets über dem Nenndruck (Pn) liegen und eine niedrige Oszillationsamplitude ermittelt wird.
  14. Trockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerkarte (11) bestimmt, dass keine Beladung (L) der Trommel (2) vorliegt, wenn erkannt wird, dass die Werte des Trockenluftdrucks (P), die vom Drucksensor (10) gemessen werden, nahe dem Nenndruck (Pn) liegen und eine kontinuierliche Bewegung ohne Oszillationsamplitude ermittelt wird.
EP06809630A 2005-10-25 2006-10-18 Trockner Not-in-force EP1945849B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200504262 2005-10-25
PCT/IB2006/053828 WO2007049190A1 (en) 2005-10-25 2006-10-18 A dryer

Publications (2)

Publication Number Publication Date
EP1945849A1 EP1945849A1 (de) 2008-07-23
EP1945849B1 true EP1945849B1 (de) 2011-10-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06809630A Not-in-force EP1945849B1 (de) 2005-10-25 2006-10-18 Trockner

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Country Link
EP (1) EP1945849B1 (de)
AT (1) ATE528434T1 (de)
ES (1) ES2374752T3 (de)
WO (1) WO2007049190A1 (de)

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WO2008065106A1 (en) * 2006-11-29 2008-06-05 Arcelik Anonim Sirketi A washer/dryer
TR200904141T1 (tr) * 2006-12-26 2009-10-21 Ar�El�K Anon�M ��Rket� Tahrik kayışı kopmasının algılandığı bir yıkayıcı/kurutucu.
US7870799B2 (en) 2008-09-11 2011-01-18 Whirlpool Corporation Method and apparatus for testing the air flow in a clothes dryer
CN102108613A (zh) * 2009-12-24 2011-06-29 博西华电器（江苏）有限公司 衣物处理设备及其控制方法
DE102013210126A1 (de) * 2013-05-29 2014-12-04 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betrieb eines Trockners mit Beladungserkennung sowie hierzu geeigneter Trockner
DE102015221032A1 (de) * 2015-10-28 2017-05-04 BSH Hausgeräte GmbH Wäschetrocknungsgerät aufweisen einen Prozessluftkreislauf und eine Volumenstrom-Bestimmungseinrichtung
CN106779012B (zh) * 2016-12-18 2019-05-21 陈国平 在卡片上蜂鸣器的双向使用方法及其电路
EP3427632B1 (de) * 2017-07-12 2022-11-02 Miele & Cie. KG Betriebsverfahren für eine geschirrspülmaschine mit einem wärmepumpenkreislauf und geschirrspülmaschine mit einem wärmepumpenkreislauf
CN114622380B (zh) * 2020-12-11 2024-03-26 广州视源电子科技股份有限公司 烘干风机的检测方法、装置及存储介质

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JPH0385199A (ja) * 1989-08-29 1991-04-10 Toshiba Corp 衣類乾燥機
DE3930727A1 (de) * 1989-09-14 1991-03-28 Miele & Cie Anordnung und verfahren zur verschmutzungsgradueberwachung und -anzeige eines flusenfilters und/oder waermetauschers in einem waeschetrockner
DE19613310C2 (de) * 1995-04-05 2000-12-21 Miele & Cie Verfahren zum Trocknen von Wäsche
DE19755916A1 (de) * 1997-12-10 1999-06-17 Aeg Hausgeraete Gmbh Wäschetrockner
JP3958523B2 (ja) * 2001-02-09 2007-08-15 リンナイ株式会社 衣類乾燥機
US6785981B1 (en) * 2003-02-19 2004-09-07 In-O-Vate Technologies Restriction detecting systems for clothes dryer exhaust systems
DE10349712B4 (de) * 2003-10-23 2007-03-01 Miele & Cie. Kg Verfahren zum Trocknen von Wäsche und Wäschetrockner zur Durchführung des Verfahrens
DE602004015241D1 (de) * 2004-02-25 2008-09-04 Candy Spa Wäschetrockner

Also Published As

Publication number Publication date
EP1945849A1 (de) 2008-07-23
ATE528434T1 (de) 2011-10-15
ES2374752T3 (es) 2012-02-21
WO2007049190A1 (en) 2007-05-03

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