EP0067896A1 - Procédé pour le séchage de linge et machine pour la mise en oeuvre du procédé - Google Patents

Procédé pour le séchage de linge et machine pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0067896A1
EP0067896A1 EP81104732A EP81104732A EP0067896A1 EP 0067896 A1 EP0067896 A1 EP 0067896A1 EP 81104732 A EP81104732 A EP 81104732A EP 81104732 A EP81104732 A EP 81104732A EP 0067896 A1 EP0067896 A1 EP 0067896A1
Authority
EP
European Patent Office
Prior art keywords
laundry
heating
heating power
temperature
drying
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
Application number
EP81104732A
Other languages
German (de)
English (en)
Other versions
EP0067896B1 (fr
Inventor
Hans Spieler
Willi Ulmer
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.)
V-Zug AG
Original Assignee
Verzinkerei Zug AG
V-Zug AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8187779&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0067896(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Verzinkerei Zug AG, V-Zug AG filed Critical Verzinkerei Zug AG
Priority to DE8181104732T priority Critical patent/DE3171805D1/de
Priority to EP81104732A priority patent/EP0067896B1/fr
Priority to AT81104732T priority patent/ATE14902T1/de
Publication of EP0067896A1 publication Critical patent/EP0067896A1/fr
Application granted granted Critical
Publication of EP0067896B1 publication Critical patent/EP0067896B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • D06F2103/02—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
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2103/36—Flow or velocity
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/14—Temperature of laundry
    • 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
    • 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
    • D06F2105/50—Starting machine operation, e.g. delayed start or re-start after power cut
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight

Definitions

  • the present invention relates to a method for drying laundry and a machine for carrying out this method.
  • a tumble dryer which is provided with a device which makes it possible to dry with reduced heating power.
  • This device is used to dry heat-sensitive laundry items at a reduced drying temperature. Furthermore, this device is used as a means of energy-saving drying, whereby it must be accepted that the drying process is extended.
  • Drying with a reduced heating output only makes sense if the dryer is filled with no more than about half the maximum permissible amount. is. If more is added, the drying time increases significantly, so that the dry goods are subjected to inadmissible mechanical stress, which can ultimately lead to wear and tear on the laundry.
  • the influence of the room temperature is related to this. At a high room temperature, a larger filling quantity with reduced heating capacity can be used be dried. At low room temperature, however, the laundry drying machine should be less heavily loaded.
  • Drying with only a lower heating level is inadequate, particularly for machines with a large drum content.
  • several heating levels or a continuous adjustment of the heating make operating the machine even more difficult. Success can hardly be achieved in practice, and undesirable side effects can also occur more frequently.
  • the object of the present invention is to provide a method and a machine for carrying out this method, which make it possible to carry out the drying process with an optimal effect without the operator having to have any experience in this regard.
  • this object is achieved according to the invention by determining the size of the amount of laundry to be dried and by adapting the size of the heating power required for drying to this size.
  • a machine which is characterized in that a device is provided for determining the amount of the material to be dried, and that on the off gang this device a device for controlling the heating power is connected.
  • a laundry drying machine also called a tumbler or drum dryer, contains a perforated drum or a drum which is supported on the end face.
  • the jacket of the tumbler surrounds the drum, a heating register, a blower and a program control device.
  • the hot air generated by the heating coil is passed through the inner drum with the aid of the fan. It dries the damp laundry while loosening it up.
  • the temperature of the air emerging from the drum can be measured at the outlet from the drum.
  • the machine is also equipped with a device that slows down the drying process in order to achieve the optimal drying effect.
  • the machine can be provided with a device which allows the device mentioned to be switched off partially or completely. Only partial switch-off means that by changing the adaptation characteristics for extremely small filling quantities, the reduction in heating output is retained and thus damage to the dry goods too high a process temperature is avoided.
  • the present method can proceed in such a way that after a certain amount of laundry has been put into the machine and after starting a drying program or choosing a drying time, the machine automatically determines which amount of laundry has been added. Then, taking into account the prevailing room temperature, it selects the economically and technically correct heating output parameters.
  • the heating output can be adjusted in several stages or continuously.
  • the heating output was adjusted right at the beginning of the drying process.
  • the heating output is only adapted to the amount of laundry loaded after a certain period of time after the start of the drying process.
  • the main advantage of this method is that at the beginning, i.e. initially dries with full heating power, which shortens the drying process, although at the same time the task mentioned in the introduction is also solved.
  • a simple method for determining the filling quantity or for assigning a specific heating output to a given filling quantity range is based.
  • the size of the heating output can either be left undiminished, or the heating output can be reduced as necessary.
  • the heating output can be reduced continuously or in stages.
  • the tumble dryer which is designed to carry out such a method, can be equipped with three heating elements 1, 2, 3 (FIG. 1), each 1/3 of the total heating power. Two of these heating elements 1 and 2 can be switched off by means of thermostats 4 and 5, which are arranged in the air flow near the drum outlet. The switching temperatures of thermostats 4 and 5 are selected so that one thermostat opens its contact at a temperature that is lower than the switching temperature of the other thermostat. In parallel with the switching contacts 6, 16 of the thermostats 4 and 5, contacts 7 and 8 are connected, which are controlled by a control device 9 of the machine.
  • a program or a drying time is selected and the machine is started up. Since all contacts 6, 7, 8, 16 are initially closed, the air is first heated to full heating power. After a certain time, the contacts 7 and 8 are opened by the control device 9. During this period, the thermostats 4 and 5 were exposed to the air emerging from the drum.
  • Another option for adaptation is the choice of the number of heating levels. For machines with a small drum volume, a great effect can be achieved with just two heating levels.
  • the distribution of the heating power can also be uneven, e.g. two stages with 1/3 and 2/3 of the maximum heating output.
  • thermo-dependent elements are used to determine the temperature.
  • the specified time period and the signals emitted by these temperature-dependent elements can be processed with the aid of ICs or with the aid of microcomputers.
  • the adjustment characteristic can be selected according to different criteria. For example, the drying time or the specific energy consumption can be kept almost constant over the entire filling area of the machine.
  • a major advantage of the method described last is. that the level of the ambient temperature of the tumble dryer is also taken into account.
  • the drying process can also be designed so that the laundry filled into the machine is first brought to a certain operating temperature by means of a fully heated air stream. The period of time required to reach the operating temperature is measured. Based on the length of the determined period of time, the size of the heating power used can then be reduced or not.
  • Such a method can in turn be carried out with the aid of a device with a plurality of heating elements in the heating register of the tumble dryer, which can be switched off depending on the length of the period mentioned.
  • the temperature level of the drying process is higher for machines with a closed air circuit than for machines with an open air circuit.
  • the process temperatures which are dangerously high for the dry material with a small filling quantity can now be avoided without any other disadvantages.
  • the method described below is particularly advantageous for tumble dryers with a closed air circuit.
  • Most tumble dryers contain a circuit for moisture level control.
  • Such a circuit arrangement (FIG. 2) contains a scanner 10 arranged in the drum space, which is connected to an evaluation circuit 11. With the help of these parts, the electrical conductivity of the dry material is continuously monitored during the drying process.
  • a first output of the evaluation circuit 11 is connected to a humidity degree control device 12.
  • the elements of the circuit arrangement just mentioned are part of a conventional clothes dryer.
  • the time gate 13 shown in Fig. 2 is also part of a conventional clothes dryer.
  • the moisture degree control device 12 and the time gate 13 are components of the program control device of the clothes dryer.
  • the number of pulses registered in the counter module 14 can be compared with a predetermined value by means of the procedure just explained and with the aid of the “hit” pulses mentioned. If the number of said pulses exceeds the specified value, the power of the heating elements is reduced to the next lower level.
  • the scanning device 1C as usual for the Humidity control used.
  • This device can also be used to adjust the heating output in several stages or continuously. Here too there is the possibility of linking the program control device with the automatic adaptation. Likewise, the device can also be partially or completely switched off here by means of an operating element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP81104732A 1981-06-19 1981-06-19 Procédé pour le séchage de linge et machine pour la mise en oeuvre du procédé Expired EP0067896B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8181104732T DE3171805D1 (en) 1981-06-19 1981-06-19 Method of drying laundry and machine for carrying out the method
EP81104732A EP0067896B1 (fr) 1981-06-19 1981-06-19 Procédé pour le séchage de linge et machine pour la mise en oeuvre du procédé
AT81104732T ATE14902T1 (de) 1981-06-19 1981-06-19 Verfahren zum trocknen von waesche und maschine zur durchfuehrung dieses verfahrens.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81104732A EP0067896B1 (fr) 1981-06-19 1981-06-19 Procédé pour le séchage de linge et machine pour la mise en oeuvre du procédé

Publications (2)

Publication Number Publication Date
EP0067896A1 true EP0067896A1 (fr) 1982-12-29
EP0067896B1 EP0067896B1 (fr) 1985-08-14

Family

ID=8187779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104732A Expired EP0067896B1 (fr) 1981-06-19 1981-06-19 Procédé pour le séchage de linge et machine pour la mise en oeuvre du procédé

Country Status (3)

Country Link
EP (1) EP0067896B1 (fr)
AT (1) ATE14902T1 (fr)
DE (1) DE3171805D1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574645A1 (fr) * 1984-12-14 1986-06-20 Esswein Sa Procede de determination de la charge en vaisselle, et lave-vaisselle mettant en oeuvre un tel procede
EP0226209A2 (fr) * 1985-12-16 1987-06-24 Kabushiki Kaisha Toshiba Séchoir
DE4403625A1 (de) * 1994-02-05 1995-08-10 Miele & Cie Wäschetrockner mit einer Vorrichtung zur Ermittlung der Beladungsmenge
EP0898008A1 (fr) * 1997-08-21 1999-02-24 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour déterminer le chargement d'un sèche -linge
EP1433894A1 (fr) 2002-12-24 2004-06-30 Lg Electronics Inc. Commande automatique d'un sèche-linge basée sur des informations de charge
EP1630279A1 (fr) * 2004-08-27 2006-03-01 Electrolux Home Products Corporation N.V. Sèche-linge domestique à haute efficacité
DE102007048249B4 (de) * 2006-10-09 2014-10-23 Lg Electronics Inc. Heizsystem und Verfahren zum Steuern des Heizsystems
DE102014216853A1 (de) 2013-10-25 2015-04-30 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum beladungsabhängigen Betrieb eines Trockners sowie hierfür geeigneter Trockner
CN106498678A (zh) * 2015-09-07 2017-03-15 青岛海尔洗衣机有限公司 干衣机控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714186A1 (de) * 1976-03-30 1977-10-20 Hoover Ltd Waeschetrockner mit heissluftgeblaese
DE2813144A1 (de) * 1977-03-24 1978-10-05 Thorn Domestic Appliances Ltd Trockner, insbesondere fuer bekleidungsstuecke
DE2817750A1 (de) * 1978-04-22 1979-10-31 Miele & Cie Verfahren zum betreiben eines feuchtigkeitsabhaengig gesteuerten waeschetrockners
DE2917230A1 (de) * 1978-04-28 1979-11-08 Mallory & Co Inc P R Verfahren und steuersystem zur steuerung des betriebs eines geraetes
DE2945696A1 (de) * 1979-11-13 1981-05-21 Ako-Werke Gmbh & Co., 7988 Wangen Schaltungsanordnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714186A1 (de) * 1976-03-30 1977-10-20 Hoover Ltd Waeschetrockner mit heissluftgeblaese
DE2813144A1 (de) * 1977-03-24 1978-10-05 Thorn Domestic Appliances Ltd Trockner, insbesondere fuer bekleidungsstuecke
DE2817750A1 (de) * 1978-04-22 1979-10-31 Miele & Cie Verfahren zum betreiben eines feuchtigkeitsabhaengig gesteuerten waeschetrockners
DE2917230A1 (de) * 1978-04-28 1979-11-08 Mallory & Co Inc P R Verfahren und steuersystem zur steuerung des betriebs eines geraetes
DE2945696A1 (de) * 1979-11-13 1981-05-21 Ako-Werke Gmbh & Co., 7988 Wangen Schaltungsanordnung

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574645A1 (fr) * 1984-12-14 1986-06-20 Esswein Sa Procede de determination de la charge en vaisselle, et lave-vaisselle mettant en oeuvre un tel procede
EP0226209A2 (fr) * 1985-12-16 1987-06-24 Kabushiki Kaisha Toshiba Séchoir
EP0226209A3 (en) * 1985-12-16 1988-05-25 Kabushiki Kaisha Toshiba Drying machine
DE4403625C2 (de) * 1994-02-05 2003-08-07 Miele & Cie Wäschetrockner mit einer Vorrichtung zur Ermittlung des Füllgrades in der Trommel
DE4403625A1 (de) * 1994-02-05 1995-08-10 Miele & Cie Wäschetrockner mit einer Vorrichtung zur Ermittlung der Beladungsmenge
EP0898008A1 (fr) * 1997-08-21 1999-02-24 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour déterminer le chargement d'un sèche -linge
US6466037B1 (en) 1997-08-21 2002-10-15 BSH Bosch und Siemens Hausgeräte GmbH Method for determining the load in a tumble dryer
EP1433894A1 (fr) 2002-12-24 2004-06-30 Lg Electronics Inc. Commande automatique d'un sèche-linge basée sur des informations de charge
US7735239B2 (en) 2002-12-24 2010-06-15 Lg Electronics Inc. Automatic dryer control based on load information
US8567091B2 (en) 2002-12-24 2013-10-29 Lg Electronics Inc Automatic dryer control based on load information
EP1630279A1 (fr) * 2004-08-27 2006-03-01 Electrolux Home Products Corporation N.V. Sèche-linge domestique à haute efficacité
DE102007048249B4 (de) * 2006-10-09 2014-10-23 Lg Electronics Inc. Heizsystem und Verfahren zum Steuern des Heizsystems
DE102014216853A1 (de) 2013-10-25 2015-04-30 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum beladungsabhängigen Betrieb eines Trockners sowie hierfür geeigneter Trockner
DE102014216853B4 (de) 2013-10-25 2022-03-24 BSH Hausgeräte GmbH Verfahren zum beladungsabhängigen Betrieb eines Trockners sowie hierfür geeigneter Trockner
CN106498678A (zh) * 2015-09-07 2017-03-15 青岛海尔洗衣机有限公司 干衣机控制方法

Also Published As

Publication number Publication date
DE3171805D1 (en) 1985-09-19
ATE14902T1 (de) 1985-08-15
EP0067896B1 (fr) 1985-08-14

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