DE2537821A1 - Clothes drier with control according to moisture - with increased heat utilisation and reduced heat in final drying stage - Google Patents

Clothes drier with control according to moisture - with increased heat utilisation and reduced heat in final drying stage

Info

Publication number
DE2537821A1
DE2537821A1 DE19752537821 DE2537821A DE2537821A1 DE 2537821 A1 DE2537821 A1 DE 2537821A1 DE 19752537821 DE19752537821 DE 19752537821 DE 2537821 A DE2537821 A DE 2537821A DE 2537821 A1 DE2537821 A1 DE 2537821A1
Authority
DE
Germany
Prior art keywords
moisture content
moisture
drying stage
control circuit
heat
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Withdrawn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
DE19752537821
Other languages
German (de)
Inventor
Peter Dipl Ing Dr Zinkann
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to DE19752537821 priority Critical patent/DE2537821A1/en
Publication of DE2537821A1 publication Critical patent/DE2537821A1/en
Withdrawn legal-status Critical Current

Links

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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/08—Control circuits or arrangements thereof
    • 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
    • D06F2103/02—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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/12—Humidity or dryness 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

Abstract

Clothes drier with control of the drying process according to moisture. On reaching a given residual moisture content of the clothes, the moisture dependent control circuit effects switching over the reducing heating output, and is reprogrammed to the desired final residual moisture content the switch-over occurs at a moisture content of 10-15%. The redn. in heating may be obtd by different circuitry arrangements, or e.g. by an electronic servo component; or the heating may be switched on cyclically in the final drying stage by means of thermostats. The control circuit may cooperate with a mechanical or electronic timer which performs one or more switching steps on reaching the given moisture content. The process is performed with increased utilisation of heat, and the clothes are exposed to less heat in final drying stage.

Description

Wäschetrockner mit feuchtigkeitsabhängiger Steuerung des Trockenvorgangs Die Erfindung betrifft einen Wäschetrockner mit feuchtigkeitsabhängiger Steuerung des Trockenvorgangs. Tumble dryer with humidity-dependent control of the drying process The invention relates to a tumble dryer with humidity-dependent control the drying process.

Gebräuchliche Wäschetrockner der vorgenannten Art besitzen eine den Feuchtigkeitsgehalt der Wäsche messende Elektrodenstrecke und eine den Meßwert der Elektrodenstrecke auswertende, elektronische Steuerschaltung.Common tumble dryers of the aforementioned type have a An electrode range measuring the moisture content of the laundry and an electrode measuring the measured value of the Electronic control circuit evaluating the electrode path.

Die elektronische Steuerschaltung überwacht den Restfeuchtegehalt der Wäsche durch Messung ihres Leitwertes, und sie bewirkt die Beendigung des Trockenvorgangs, sobald der vorher über einen Wahlschalter eingegebene Feuchtegrad der Wäsche erreicht ist.The electronic control circuit monitors the residual moisture content the laundry by measuring its conductance, and it ends the drying process, as soon as the laundry moisture level previously entered via a selector switch is reached is.

Insbesondere bei Trocknungsprogrammen, die darauf abzielen, einen geringen Restfeuchtegehalt der Wäsche zu erreichen, stellt sich vor allem gegen Ende des Trocknungsvorgangs eine nicht unerhebliche Wirkungsgradverschlechterung ein. Dies liegt daran,daß die zur Verfügung stehende Heizenergie durch die nur noch mit geringer Feuchtigkeit behaftete Wäsche nicht mehr voll ausgenutzt werden kann.Especially with drying programs that aim to create a Achieving a low residual moisture content in the laundry is a particular challenge At the end of the drying process, a not inconsiderable deterioration in efficiency a. This is because the available heating energy through the only Laundry with little moisture can no longer be used to the full.

In dieser Phase des Trodcenprozesses ist es weiterhin nachteilig, daß der Überschuß an Heizenergie eine Temperaturerhöhung des Luftstromes zur Folge hat. Dies kann sich unter Umständen negativ auf in der Charge befindliche Wäschestücke aus empfindlichen Gewebearten auswirken.In this phase of the Trodcen process, it is still disadvantageous that the excess of heating energy results in an increase in the temperature of the air flow Has. Under certain circumstances, this can have a negative effect on items of laundry in the batch from sensitive tissue types.

Die Aufgabe der Erfindung ist es nun, einen Wäschetrockner mit fcuchtigkeitsabhängiger Steuerung des Trockenprozesses zu offenbaren, bei dem die vorbeschriebonen Nachteile vermieden lçerden. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß bei Erreichen eines vorbestimmten Restfeuchtegehaltes der Wäsche die feuchtigkeitsabhängige Steuerschaltung die Umschaltung auf eine reduzierte Heizleistung bewirkt und daß dabei die feuchtigkeitsabhängige Steuerschaltung auf den gewünschten Endwert der Restfeuchte neu programmiert wird.The object of the invention is now to provide a tumble dryer with a moisture-dependent To reveal control of the drying process, in which the above-described disadvantages avoided firing. According to the invention, this object is achieved by that when a predetermined residual moisture content of the laundry is reached, the moisture-dependent Control circuit causes the switch to a reduced heating power and that the humidity-dependent control circuit to the desired final value of the Residual moisture is reprogrammed.

In vorteilhafter Weise ist vorgesehen, daß die Umschaltung auf die reduzierte Heizleistung bei einem Restfeuchtewert zwischen 10 und 15 ffi erfolgt.It is advantageously provided that the switch to the Reduced heating output takes place with a residual moisture value between 10 and 15 ffi.

Die wesentlichen Vorteile bei der erfindungsgemäßen Maßnahme sind darin zu erblicken, daß der Trocknungsprozess mit einer besseren Wärmeausnutzung abläuft und daß die Wäsche in der Endphase des Trocknens nicht mehr einer erhöhten Temperatur ausgesetzt ist.The main advantages of the measure according to the invention are to see in it that the drying process with a better heat utilization expires and that the laundry in the final drying phase is no longer increased Temperature.

Im nachfolgenden wird der Gegenstand der Erfindung beispielhaft erläutert.The subject matter of the invention is explained below by way of example.

In der praktischen Ausführung könnte die Heizungsreduzierung erzielt werden durch unterschiedliche, allgemein bekannte Schaltungsmaßnahmen oder z.B. durch ein elektronisches Stellglied. Weiterhin wäre es denkbar, die Heizung in der Endphase des Trocknens mittels Thermostaten taktweise zuzuschalten.In the practical implementation, the heating reduction could be achieved are made by different, generally known circuit measures or e.g. by an electronic actuator. Furthermore, it would be conceivable to use the heater in the The final drying phase can be switched on in cycles by means of a thermostat.

Die feuchtigkeitsabhängige Steuerschaltung müßte mit einem mechanischen oder elektronischen Timer in der Weise zusammenwirken, daß bei Erreichen des vorbestimmten Restfeuchtegehaltes die elektronische Steuerschaltung den Timer veranlaßt, einen oder mehrere Schaltschritte auszuführen, wobei einmal die Heizungsreduzierung erfolgt und wobei zum anderen die feuchtigkeitsabhängige Steuerschaltung auf den Restfeuchtegehalt für die endgültige Beendigung des Trockenvorgangs umprogrammiert wird.The humidity-dependent control circuit would have to be with a mechanical or electronic timer cooperate in such a way that when the predetermined Residual moisture content the electronic control circuit causes the timer, a or to carry out several switching steps, with the heating reduction taking place once and on the other hand, the moisture-dependent control circuit on the residual moisture content is reprogrammed for the final termination of the drying process.

Claims (2)

Patentansprüche Claims Wäschetrockner mit feuchtigkeitsabhängiger Steuerung des Trockenvorgangs, dadurch gekennzeichnet, daß bei Erreichen eines vorbestimmten Restfeuchtegehaltes der Wäsche die feuchtigkeitsabhängige Steuerschaltung die Umschaltung auf eine reduzierte Heizleistung bewirkt und daß dabei die feuchtigkeitsabhängigo Steuerschaltung auf den gewünschten Endwert der Restfeuchte neu programmiert wird.Tumble dryer with humidity-dependent control of the drying process, characterized in that when a predetermined residual moisture content is reached of the laundry, the humidity-dependent control circuit switches to a reduced one Heating power causes and that thereby the humidity-dependent control circuit on the desired final value of the residual moisture is reprogrammed. 2. Wäschetrockner mit feuchtigkeitsabhängiger Steuerung des Trockenvorgangs nach Anspruch 1, dadurch gekennzeichnet, daß die Umschaltung auf die reduzierte Heizleistung bei einem Restfeuchtegehalt der Wäsche im Bereich zwischen 10 und 15 ß erfolgt.2. Tumble dryer with humidity-dependent control of the drying process according to claim 1, characterized in that the switchover to the reduced Heating output with a residual moisture content of the laundry in the range between 10 and 15 ß takes place.
DE19752537821 1975-08-26 1975-08-26 Clothes drier with control according to moisture - with increased heat utilisation and reduced heat in final drying stage Withdrawn DE2537821A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752537821 DE2537821A1 (en) 1975-08-26 1975-08-26 Clothes drier with control according to moisture - with increased heat utilisation and reduced heat in final drying stage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752537821 DE2537821A1 (en) 1975-08-26 1975-08-26 Clothes drier with control according to moisture - with increased heat utilisation and reduced heat in final drying stage

Publications (1)

Publication Number Publication Date
DE2537821A1 true DE2537821A1 (en) 1977-03-10

Family

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Family Applications (1)

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DE19752537821 Withdrawn DE2537821A1 (en) 1975-08-26 1975-08-26 Clothes drier with control according to moisture - with increased heat utilisation and reduced heat in final drying stage

Country Status (1)

Country Link
DE (1) DE2537821A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3206619A1 (en) * 1981-02-24 1982-09-23 Bristol-Myers Co., 10022 New York, N.Y. ELECTRIC HAIR DRYER
EP0362676A2 (en) * 1988-10-06 1990-04-11 INDUSTRIE ZANUSSI S.p.A. A laundry drying control device for a clothes drier
FR2717832A1 (en) * 1994-03-26 1995-09-29 Miele & Cie Method for controlling the full heating power of a tumble dryer
FR2770631A1 (en) * 1997-11-05 1999-05-07 Esswein Sa METHOD FOR OPTIMIZING THE ENERGY CONSUMPTION OF A DRYING MACHINE BY AIR STREAM OF PRODUCTS OR MATERIALS ARRANGED IN AN ENCLOSURE
EP2591162A2 (en) * 2010-07-09 2013-05-15 LG Electronics Inc. Method for operating clothes treating apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3206619A1 (en) * 1981-02-24 1982-09-23 Bristol-Myers Co., 10022 New York, N.Y. ELECTRIC HAIR DRYER
EP0362676A2 (en) * 1988-10-06 1990-04-11 INDUSTRIE ZANUSSI S.p.A. A laundry drying control device for a clothes drier
EP0362676A3 (en) * 1988-10-06 1992-03-11 INDUSTRIE ZANUSSI S.p.A. A laundry drying control device for a clothes drier
FR2717832A1 (en) * 1994-03-26 1995-09-29 Miele & Cie Method for controlling the full heating power of a tumble dryer
FR2770631A1 (en) * 1997-11-05 1999-05-07 Esswein Sa METHOD FOR OPTIMIZING THE ENERGY CONSUMPTION OF A DRYING MACHINE BY AIR STREAM OF PRODUCTS OR MATERIALS ARRANGED IN AN ENCLOSURE
EP0915199A1 (en) * 1997-11-05 1999-05-12 Esswein S.A. Method for optimizing the energy consumption in a laundry drier and drier using such method
EP2591162A2 (en) * 2010-07-09 2013-05-15 LG Electronics Inc. Method for operating clothes treating apparatus
EP2591162A4 (en) * 2010-07-09 2013-08-21 Lg Electronics Inc Method for operating clothes treating apparatus
US8806775B2 (en) 2010-07-09 2014-08-19 Lg Electronics Inc. Method for operating clothes treating apparatus

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