EP0707107A1 - Vorrichtung zum Bestimmen der Trocknungszeit in Wäschetrocknern - Google Patents

Vorrichtung zum Bestimmen der Trocknungszeit in Wäschetrocknern Download PDF

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Publication number
EP0707107A1
EP0707107A1 EP95114450A EP95114450A EP0707107A1 EP 0707107 A1 EP0707107 A1 EP 0707107A1 EP 95114450 A EP95114450 A EP 95114450A EP 95114450 A EP95114450 A EP 95114450A EP 0707107 A1 EP0707107 A1 EP 0707107A1
Authority
EP
European Patent Office
Prior art keywords
drying
clothes
machine
dryness
cycle
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.)
Withdrawn
Application number
EP95114450A
Other languages
English (en)
French (fr)
Inventor
Ingo Haberl
Fabio Marcuzzi
Francesco Drius
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.)
Electrolux Zanussi Elettrodomestici SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
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
Application filed by Electrolux Zanussi Elettrodomestici SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0707107A1 publication Critical patent/EP0707107A1/de
Withdrawn legal-status Critical Current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
    • 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
    • D06F2103/06—Type or 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
    • 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
    • D06F2103/38—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
    • D06F2105/62—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
    • D06F58/46—Control of the operating time

Definitions

  • the present invention refers to a drying process, in particular a clothes drying process, which does not terminate its drying cycle on the basis of a time to be pre-set by the user, or the machine itself, through a timer, but rather on the basis of the actual contents of residual moisture in the clothes making up the drying load.
  • a peculiar feature of such a method lies in the operational contrivances enabling the time needed to reach a pre-determined degree of dryness of the clothes to be determined not only quite early in the process, but also in a fully automatic manner.
  • Clothes drying machines are known in the state of the art which are equipped with devices to automatically calculate the time needed to reach a pre-determined dryness level or degree. So, for instance, the German patent specification DE 3030864 to Bosch-Siemens Haustechnik discloses an automatic clothes drying process in which the duration of the drying cycle is determined on the basis of the type of the clothes making up the drying load, as well as by processing out the temperature gradient as calculated between two subsequent moments during the initial temperature rise stage.
  • Such a method has a main drawback in that the user is each time requested to perfectly know what kind and type of fabrics he or she is loading into the drum of the machine for drying, and then to pass on this information to the machine itself. Furthermore, since the calculation is based on a single measurement, ie. on an initial gradient of temperature, the method turns out to be quite inaccurate owing to the effect that is brought in by other factors having an influence on the drying time.
  • the Japanese patent specification J 62148698 to Matsushita discloses a clothes drying machine in which the drying cycle is programmed on the basis of a plurality of experiments run on the machine, the gradient of temperature during an actual drying phase of the process, and some other information such as the humidity contents, the type of contact and the like, as detected by appropriate sensors.
  • Such a machine is actually capable of ensuring a greater accuracy in automatically calculating the expected time needed to reach a pre-determined drying level of the clothes, but it nevertheless has a main drawback in that it requires the use of additional sensors, with the accompanying functional and construction complications.
  • the patent specification GB 2 034 451 teaches a method according to which the drying cycle of a clothes drying machine can be terminated on the basis of the measurement and the assessment of the rise gradient of the temperature of the exhaust air.
  • a solution is actually rather inaccurate, since the temperature rise pattern depends also on a number of other important factors whose effect is not yet known.
  • water will be used to indifferently mean also wash liquor and rinse water.
  • a simplification will not affect the clearness or understandability of the illustration owing to the context in which such a term is used, as anyone skilled in the art will readily appreciate along with the fact that the present invention applies to combined clothes washing and drying machines as well, for that part of their cycle and for those devices and arrangements of such machines which are devoted to or used during their drying phase alone.
  • the proposed method is based on the calculation of the drying time, as performed after the first phase of the drying cycle when steady-state temperature conditions start practically to prevail inside the machine.
  • the temperature of the air rises at a more or less quick rate, while the actual evolution is influenced by a number of prevailing factors, ie.:
  • Such an algorithm utilizes the principle of neural networks, which is known to those skilled in the art, but of which a non-exclusive example is given below for purposes of a more complete documentation.
  • neural networks can be found for instance in the publication "NEURALE NETZE” by Monik Koehle, ed. Springer Verlag Wien-New York, as well as in the publication "NEURAL NETWORK EXPERIMENTS ON PERSONAL COMPUTERS AND WORKSTATIONS”.
  • the neuron A1 receives 6 inputs, combines them and sends in turn 4 outputs to the neurons B1, B2, B3, B4.
  • the valuableness of neural networks comes from their peculiarity according to which, through an appropriate selection of the coefficients a1, a2 ... etc., as well as b, it is possible for the behaviour of physical systems to be reproduced, ie. for the output from the input signals to be calculated much in the same way as the actual physical system would respond to said inputs.
  • This last step can anyway be automated through the use of available computational software packages that enable the coefficients a1, a2 ... b to be assessed on the basis of experimental input and related output data.
  • An automatic calculation and control device such as for instance a microprocessor, stores the desired level of dryness in its memory and, during the first phase of the drying cycle, stores also a plurality n of temperatures T1, T2 ... Tn that are detected at regular intervals in correspondence of respective instants t1, t2 ... tn (see Fig. 3).
  • Said function is obtained by using a learning algorithm according to the principles of neural networks (for instance, of the "perceptron" type) to classify in an adequately differentiated manner the possible historical data sets, by processing the respective data obtained experimentally for each machine capable of performing said process, while sequentially and methodically varying, and storing, the most significant parameters (as selected on the basis of thermodynamic considerations and fine-tuned experimentally), as referred to instant values, average values, differences of the temperature values making up the historical data set, as well as all most significant factors having an influence on the drying process, such as the amount and the type of clothes in the drying load, the room temperature and the machine temperature, the heat capacity of the machine, etc., along with the drying times as measured experimentally in correspondence of respective levels of dryness.
  • the most significant parameters as selected on the basis of thermodynamic considerations and fine-tuned experimentally
  • the difference lies in the fact that, with the method according to the present invention, the concept of temperature gradient (which is the cornerstone of the afore cited patents) is dropped in favour of the concept, and the corresponding mathematical-experimental techniques, of historical sets, wherein various methods of classification of historical sets are applied in view of establishing a correlation between the results and the drying times needed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Drying Of Solid Materials (AREA)
EP95114450A 1994-10-11 1995-09-14 Vorrichtung zum Bestimmen der Trocknungszeit in Wäschetrocknern Withdrawn EP0707107A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN940061 1994-10-11
IT94PN000061A IT1267590B1 (it) 1994-10-11 1994-10-11 Asciugabiancheria con dispositivi perfezionati per la determinazione del tempo di asciugatura

Publications (1)

Publication Number Publication Date
EP0707107A1 true EP0707107A1 (de) 1996-04-17

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ID=11394953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95114450A Withdrawn EP0707107A1 (de) 1994-10-11 1995-09-14 Vorrichtung zum Bestimmen der Trocknungszeit in Wäschetrocknern

Country Status (3)

Country Link
EP (1) EP0707107A1 (de)
JP (1) JPH08117493A (de)
IT (1) IT1267590B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017207601A1 (de) * 2017-05-05 2018-11-08 BSH Hausgeräte GmbH Betreiben eines Wäschetrocknungsgeräts
CN113062094A (zh) * 2021-02-26 2021-07-02 无锡小天鹅电器有限公司 一种烘干控制方法、装置、衣物处理设备及存储介质
CN113622148A (zh) * 2021-07-29 2021-11-09 无锡飞翎电子有限公司 衣物处理设备及其负载量判断方法、装置及存储介质
CN114182510A (zh) * 2021-12-31 2022-03-15 广东美的白色家电技术创新中心有限公司 干衣机控制方法、装置、干衣机及存储介质

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014136544A1 (ja) * 2013-03-05 2014-09-12 三菱電機株式会社 除湿機
EP2977504A4 (de) * 2013-03-19 2016-08-24 Mitsubishi Electric Corp Entfeuchter
CN115244243A (zh) * 2021-02-25 2022-10-25 松下知识产权经营株式会社 干燥时间预测方法、干燥时间预测系统及干燥机
CN115244242A (zh) * 2021-02-25 2022-10-25 松下知识产权经营株式会社 预测方法、程序、预测系统、服务器及显示装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2034451A (en) 1978-10-19 1980-06-04 Junga Verkstaeder Ab Tumbler dryer
DE3030864A1 (de) 1980-08-14 1982-02-25 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum automatischen steuern des trocknungsvorganges in einem waeschetrocknungssystem und einrichtung zur durchfuehrung des verfahrens
DE3102843A1 (de) * 1981-01-29 1982-08-19 Miele & Cie GmbH & Co, 4830 Gütersloh Verfahren zur steuerung des trocknungsgrades in einem waeschetrockner
EP0060698A1 (de) * 1981-03-12 1982-09-22 T.I. Domestic Appliances Limited Trommeltrockner
JPS62148698A (ja) 1985-12-20 1987-07-02 松下電器産業株式会社 衣類乾燥機の乾燥終了予想時間の表示方法
JPS6252598B2 (de) 1979-10-15 1987-11-06 Hitachi Ltd
US5172490A (en) * 1991-02-28 1992-12-22 Kabushiki Kaisha Toshiba Clothes dryer with neurocontrol device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2034451A (en) 1978-10-19 1980-06-04 Junga Verkstaeder Ab Tumbler dryer
JPS6252598B2 (de) 1979-10-15 1987-11-06 Hitachi Ltd
DE3030864A1 (de) 1980-08-14 1982-02-25 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum automatischen steuern des trocknungsvorganges in einem waeschetrocknungssystem und einrichtung zur durchfuehrung des verfahrens
DE3102843A1 (de) * 1981-01-29 1982-08-19 Miele & Cie GmbH & Co, 4830 Gütersloh Verfahren zur steuerung des trocknungsgrades in einem waeschetrockner
EP0060698A1 (de) * 1981-03-12 1982-09-22 T.I. Domestic Appliances Limited Trommeltrockner
JPS62148698A (ja) 1985-12-20 1987-07-02 松下電器産業株式会社 衣類乾燥機の乾燥終了予想時間の表示方法
US5172490A (en) * 1991-02-28 1992-12-22 Kabushiki Kaisha Toshiba Clothes dryer with neurocontrol device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017207601A1 (de) * 2017-05-05 2018-11-08 BSH Hausgeräte GmbH Betreiben eines Wäschetrocknungsgeräts
CN113062094A (zh) * 2021-02-26 2021-07-02 无锡小天鹅电器有限公司 一种烘干控制方法、装置、衣物处理设备及存储介质
CN113062094B (zh) * 2021-02-26 2022-06-14 无锡小天鹅电器有限公司 一种烘干控制方法、装置、衣物处理设备及存储介质
CN113622148A (zh) * 2021-07-29 2021-11-09 无锡飞翎电子有限公司 衣物处理设备及其负载量判断方法、装置及存储介质
WO2023005574A1 (zh) * 2021-07-29 2023-02-02 无锡飞翎电子有限公司 衣物处理设备及其负载量判断方法、装置及存储介质
CN113622148B (zh) * 2021-07-29 2024-03-26 无锡飞翎电子有限公司 衣物处理设备及其负载量判断方法、装置及存储介质
CN114182510A (zh) * 2021-12-31 2022-03-15 广东美的白色家电技术创新中心有限公司 干衣机控制方法、装置、干衣机及存储介质

Also Published As

Publication number Publication date
JPH08117493A (ja) 1996-05-14
ITPN940061A0 (it) 1994-10-11
IT1267590B1 (it) 1997-02-07
ITPN940061A1 (it) 1996-04-11

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