EP1921202A2 - Procédé destiné à la détermination de la quantité de chargement dans un séche-linge et sèche-linge - Google Patents

Procédé destiné à la détermination de la quantité de chargement dans un séche-linge et sèche-linge Download PDF

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Publication number
EP1921202A2
EP1921202A2 EP07020564A EP07020564A EP1921202A2 EP 1921202 A2 EP1921202 A2 EP 1921202A2 EP 07020564 A EP07020564 A EP 07020564A EP 07020564 A EP07020564 A EP 07020564A EP 1921202 A2 EP1921202 A2 EP 1921202A2
Authority
EP
European Patent Office
Prior art keywords
absolute humidity
charge
values
amount
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.)
Withdrawn
Application number
EP07020564A
Other languages
German (de)
English (en)
Other versions
EP1921202A3 (fr
Inventor
Rainer Münzner
Kay Schmidt
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP1921202A2 publication Critical patent/EP1921202A2/fr
Publication of EP1921202A3 publication Critical patent/EP1921202A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • D06F2103/34—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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
    • 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

Definitions

  • the invention relates to a method for determining the amount of charge of laundry in a tumble dryer and a correspondingly constructed tumble dryer.
  • the invention has for its object to provide an aforementioned method and a corresponding dryer, with which disadvantages of the prior art can be avoided and in particular with limited effort, the amount of charge can be determined in laundry in a tumble dryer.
  • the absolute humidity is measured in the air outlet, which leads away from the hold of the tumble dryer.
  • Particularly advantageous is the application of the invention to exhaust air dryers which blow the moist air into the outside environment, but it is not limited thereto. According to the invention, in a first fundamental
  • Embodiment of the invention determines the amount of charge in the cargo space characterized in that the maximum value and / or the course of absolute humidity in the air outlet or in the air discharged from the hold of the tumble dryer is determined. For this purpose, so to speak, the measured values are repeatedly determined, and as soon as they fall again after an initial increase, the maximum value is just exceeded. For this purpose, usually a single humidity sensor is sufficient, which keeps the expenditure on components as well as on installation time within limits.
  • the individual values are compared with each other and of which the highest or the maximum value is used. This collection of values may be within a certain time window. Alternatively, it can be assumed that the maximum value has been detected if no further higher value has been detected for a certain time after the highest value so far, for example a few minutes.
  • the detection is slightly different if the course of the absolute humidity is monitored. Then, measured values are not compared with each other in terms of their absolute value, but they are compared relative to each other. If the vast majority of successive absolute humidity readings are above the previous one, the curve will increase. If the vast majority of measured values lie below the preceding one, the curve will drop. If a time window of a few minutes is selected for each of these, then the observation of the gradient of the course of the absolute air humidity can also be concluded approximately to the maximum.
  • the course of absolute humidity is usually such that it rises sharply after being loaded with wet laundry and starting to operate. Then it falls or flattens and reaches a rather shallow maximum to fall off relatively flat from there on. The more wet laundry in the cargo hold, the higher the maximum value of the course, and the flatter it falls off.
  • the differences of the maximum values as a function of the charge quantity are so great that they allow a determination of the charge quantity on the basis of the maximum value of different charges dependent on the charge quantity.
  • the advantage of determining the charge amount of laundry present in the load compartment is that automatic program sequences can be optimized or better adapted to the actual amount of charge present. This is mainly due to the fact that the moisture content of laundry after a washing process is usually in a relatively narrow range, that is about always the same, in particular a residual moisture content of about 50% to 70%, ie the weight of water contained based on the weight of Laundry. If the charge quantity is known, all the moisture in the cargo space can be determined and a program sequence can be tuned to it be, especially in terms of duration, intensity of heating, etc ..
  • values it is possible for values to be stored for a correlation of maximum values of the absolute air humidity with a specific charge quantity. This means that in the case of a residual moisture of the laundry which has been assumed to exist, a relationship is stored between the maximum value of the absolute humidity and the given amount of charge, in particular for a particular type of tumble dryer. By comparison in a control of the tumble dryer, the charge amount of laundry present in the hold can then be determined from the maximum value of the absolute humidity determined by measurement.
  • the amount of charge in the hold is determined according to the invention by determining a value of the absolute humidity in the air outlet of the hold at a certain defined time after the start of operation of the tumble dryer.
  • values for the absolute air humidity are stored at a particular point in time in correlation with a specific charge amount of laundry in the tumble dryer.
  • a comparison can be made of the measured absolute humidity at a certain time and with these stored values. From this, the amount of charge in the hold can then be determined again.
  • the respective values can be experimentally determined for a specific type of clothes dryer, and then stored in a controller.
  • the aforementioned specific time may advantageously be between 5 minutes and 40 minutes after the start of operation. It is advantageously taken into account that in the first 5 minutes, the value of the absolute humidity still increases so much that this behavior is essentially independent of the amount of charge. Only after an even longer time, the gradients change depending on the amount of charge.
  • the specific time is about 15 to 20 minutes. In many cases, this time is after reaching the maximum value, when the course is already falling again.
  • the time at which the gradient of the absolute air humidity that is to say the gradient of its curve, assumes a specific value is used to determine the charge quantity.
  • values for a correlation of different values of the gradient at specific times with a certain amount of charge dependent thereon are advantageously stored.
  • Control of the clothes dryer performs the comparison between the measured and recorded absolute humidity gradient and the time. From this, it is then possible to determine, as before, the amount of charge of wet laundry in the hold.
  • the aforementioned embodiment of the method of the time is used, to which the gradient of the absolute humidity is already negative again, ie after reaching the maximum value.
  • the advantage with this method is that a longer time is required, for example 20 to 30 minutes.
  • the above-mentioned profiles for the absolute humidity differ depending on the time depending on the amount of charge from each other. Even so, a distinction can be made.
  • the time when the Gradient of absolute humidity has become zero In particular, it may be a point in time at which the gradient thereof decreases again or decreases and is negative.
  • the duration of a plateau-like course of the absolute humidity is determined and from this the residual moisture is determined, which had the laundry after washing and before the drying process.
  • the longer the duration of the plateau phase the higher the residual moisture is assumed. Knowing this residual moisture, so you can determine the expected end of the drying process even more accurate.
  • the plateau phase can be defined in such a way that meanwhile a deviation of the absolute humidity of a maximum of 10% below the maximum value is allowed. The course of the absolute humidity is therefore relatively flat.
  • a humidity sensor located in the air outlet from the load compartment, located in the air outlet from the load compartment. It is connected to a control of the tumble dryer. This in turn is not only designed to record the measured values of the humidity sensor, but can also record the measured values or their course. Furthermore, the aforementioned values are stored in a memory of the controller for the said correlations. Finally, the control advantageously has a time recording for the time since the start of operation.
  • Fig. 1 an inventive clothes dryer 11 is shown.
  • the presentation is limited to the functionally necessary parts and is merely intended to illustrate how these functionally essential parts of the tumble dryer work.
  • a load compartment 12 is laundry 14 with a residual moisture after washing or spinning.
  • This cargo space is usually rotated or rotated, but this does not play a significant role for the invention.
  • Air is introduced into the loading space 12 via an air inlet 16.
  • the air flow is caused by the fan 17, 18 air is heated by the downstream heater for drying the laundry 14.
  • an air outlet 20 leads out of the load compartment 12 to the outside, which identifies the tumble dryer 11 as an exhaust air dryer.
  • the Warm air is thus, as known from such dryers, fed to the laundry 14, absorbs moisture and transports it via the air outlet 20 to the outside, so as to dry the laundry.
  • a humidity sensor 22 is arranged in the air outlet 20. Such a humidity sensor 22 is known to the person skilled in the art and need not be explained in detail here.
  • the humidity sensor 22 is connected to a controller 24, as well as the fan 17 and the heater 18.
  • the controller 24 has a memory 25, possibly also integrated, in which various values can be stored, which will be discussed in more detail below.
  • the invention can also be applied to a condensation dryer in a modified form.
  • a corresponding moisture sensor is provided in an air outlet of the cargo space in front of a downstream condensation device.
  • the absolute humidity in the exhaust air can be detected there as well.
  • Fig. 2 several curves of the humidity over time are shown.
  • the first course is for a case that in the clothes dryer 11 as shown in FIG. 1 in the hold 12 12 kg of laundry.
  • the second course shows a drying process for 3 kg of laundry and the third course for 1.5 kg.
  • the difference in the courses is also due to the fact that the absolute humidity in the air outlet 20 depends on the surface of the laundry 14. The surface in turn depends on the amount of laundry or the weight. You just want to find out. So can be closed by the amount of absolute humidity on the amount of laundry.
  • the second course for 3 kg of laundry runs over a longer time the same as the first course, flattens after about 10 minutes significantly, and then take a not very pronounced maximum value, from which he falls again steeply after about 16 minutes.
  • the first course for 5 kg of laundry flattens off a little later than the second course, namely at about 12 to 14 minutes. It reaches a maximum value of just over 30 minutes. At a bit over 40 minutes, the course begins, first slowly and then fall slightly more again.
  • each dashed line is shown, where or at which time a maximum value of the humidity is achieved.
  • Stored corresponding values can be retrieved in the memory 25 from the controller 24.
  • the controller 24 can already determine, based on the maximum values of the courses according to FIG. 2, how much laundry is approximately in the cargo space 12. Admittedly, however, especially in the course 1, the determination of a maximum value is subject to great inaccuracy. It does not need to be controlled exactly to one minute in the process of controlling the tumble dryer. An inaccuracy should stay within an area of a few minutes.
  • the value of the absolute humidity after a certain time can be used.
  • a time of slightly more than 16 minutes is suitable here.
  • the course 1 has not yet reached its maximum value
  • the course 2 is approaching its maximum value
  • the course 3 is already decreasing again.
  • the courses at this time or a similar time are sufficiently different to be distinguished from one another by comparison.
  • a gradient or the gradient of the course in particular at a later time or after exceeding the respective maximum value, can be detected.
  • a fixed time can be provided, for example at about 16 minutes, to detect a course similar to that of course 3 yet. This is indicated by lines corresponding to the value for the gradient.
  • the invention may again be provided to detect the gradient continuously. It can then be detected the time at which the gradient assumes a certain value. Also, by this characteristic, at which time one of the courses of FIG. 2 has a certain slope, the courses can be different from each other and thus ultimately determine the amount of laundry 14 in the hold 12 of the clothes dryer 11 again.
  • the controller 24 can turn off the course of the drying process with respect to time, air supply and possibly air temperature.
  • an optimized in terms of result and energy consumption drying process can be performed.
  • some of the determined values, in particular the amount of laundry and possibly even an existing residual moisture of the laundry in the load compartment 12, are displayed on a display on the tumble dryer 11 as information for a user.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Drying Of Solid Materials (AREA)
EP07020564A 2006-11-06 2007-10-20 Procédé destiné à la détermination de la quantité de chargement dans un séche-linge et sèche-linge Withdrawn EP1921202A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006053274A DE102006053274A1 (de) 2006-11-06 2006-11-06 Verfahren zum Ermitteln der Ladungsmenge in einem Wäschetrockner und Wäschetrockner

Publications (2)

Publication Number Publication Date
EP1921202A2 true EP1921202A2 (fr) 2008-05-14
EP1921202A3 EP1921202A3 (fr) 2009-10-07

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EP07020564A Withdrawn EP1921202A3 (fr) 2006-11-06 2007-10-20 Procédé destiné à la détermination de la quantité de chargement dans un séche-linge et sèche-linge

Country Status (5)

Country Link
US (1) US8112902B2 (fr)
EP (1) EP1921202A3 (fr)
CN (1) CN101177910A (fr)
DE (1) DE102006053274A1 (fr)
RU (1) RU2471903C2 (fr)

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US8782922B2 (en) 2010-11-24 2014-07-22 Ecolab Usa Inc. Dryer monitoring
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DE102011076220A1 (de) * 2011-05-20 2012-11-22 BSH Bosch und Siemens Hausgeräte GmbH Trockner mit Feuchtesensor sowie Verfahren zu seinem Betrieb
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EP2977503B1 (fr) * 2014-07-25 2019-04-24 Electrolux Appliances Aktiebolag Appareil de séchage de linge avec unité de chauffage à seuils de température réglables
DE102015217667A1 (de) 2015-09-15 2017-03-16 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Wäschetrockners
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DE102018219361A1 (de) 2018-11-13 2020-05-14 BSH Hausgeräte GmbH Wäschetrockner mit Beschleunigungssensor und Verfahren zu seinem Betrieb
DE102018219349A1 (de) 2018-11-13 2020-05-14 BSH Hausgeräte GmbH Wäschetrockner mit verbesserter Steuerung und Verfahren zu seinem Betrieb
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RU2471903C2 (ru) 2013-01-10
US8112902B2 (en) 2012-02-14
US20080104860A1 (en) 2008-05-08
EP1921202A3 (fr) 2009-10-07
DE102006053274A1 (de) 2008-05-08
RU2007140696A (ru) 2009-05-20

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