EP3561173A1 - Scanner for a device for measuring moisture content of laundry, device and laundry dryer - Google Patents
Scanner for a device for measuring moisture content of laundry, device and laundry dryer Download PDFInfo
- Publication number
- EP3561173A1 EP3561173A1 EP19169708.5A EP19169708A EP3561173A1 EP 3561173 A1 EP3561173 A1 EP 3561173A1 EP 19169708 A EP19169708 A EP 19169708A EP 3561173 A1 EP3561173 A1 EP 3561173A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drying drum
- laundry
- scanner
- contact
- moisture content
- 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
Links
- 238000001035 drying Methods 0.000 claims abstract description 35
- 229920003023 plastic Polymers 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000007774 longterm Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
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
- 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
- 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
Definitions
- the invention relates to a scanner for a device for detecting a moisture content of a laundry located in a tumble dryer with a rotary drying drum referred to in the preamble of claim 1, a device for detecting a moisture content of a laundry dryer located in a rotary drying drum laundry in the preamble of claim 5 type and a tumble dryer with a rotatable drying drum referred to in the preamble of claim 6 Art.
- the known sliding contacts are designed as carbon contacts. See, for example, the EP 2 028 314 B1 , From the EP 2 377 989 A1 is a clothes dryer with a device for detecting a moisture content in the laundry, in which the contact strip is formed of an electrically conductive plastic.
- the invention thus provides the problem of providing a scanner, a device for detecting a moisture content of a laundry and a tumble dryer with such a device, in which a proper function of detecting the moisture content of the laundry over a long period is ensured.
- this problem is solved by a scanner for a device for detecting a moisture content of a laundry located in a tumble dryer with a rotary drying drum with the features of claim 1, after which the sliding contact is formed of an electrically conductive plastic. Furthermore, the problem of the invention by a device for detecting a moisture content of a located in a tumble dryer with a rotary drying drum laundry with the features of claim 5 and a tumble dryer with a rotatable Drying drum solved with the features of claim 6.
- the advantage achievable with the invention is in particular that a proper function of the detection of the moisture content of the laundry is ensured over a long period of time. Accordingly, the life of the scanner according to the invention, the inventive device for detecting the moisture content of the laundry and equipped with such a device according to the invention laundry dryer extended. Thus, the number of related service calls is reduced. For example, it is conceivable that the scanner according to the invention, the device according to the invention and the tumble dryer according to the invention need not be serviced or repaired in the components relevant to the invention over their entire service life, ie over their total service life.
- the advantages of the invention apply equally to household appliances as well as professional dryers.
- the invention has an advantageous effect on tumble dryers for the professional sector, since these tumble dryers are subjected to particularly high loads. Due to the larger drum diameters, the samplers are subject to higher peripheral speeds and, compared to household appliances, have a longer running distance over the service life. The more varied number of textile types to be dried in the professional sector also contributes to the intensive wear of the scanning carbon. Accordingly, a solution to the problem of wear in the sliding contacts in professional devices even more important than in the home appliances.
- the sliding contact is designed as an electrically conductive plastic. Electrically conductive plastics are available in a variety of embodiments and material properties and thus advantageously used for a variety of different applications.
- the scanner according to the invention is freely selectable in terms of type, material, dimensioning, shape, arrangement and number within wide suitable limits. The same applies to the at least one sliding contact of the scanner.
- the sliding contact has a Gleitreibwert, dynamic against steel, of less than or equal to 0.6, preferably of less than or equal to 0.4, more preferably of less than or equal to 0.2.
- the friction between the sliding contact on the one hand and the drying drum or arranged on the drying drum contact band on the other side reduced. Accordingly, the wear of the at least one sliding contact is substantially reduced.
- a further advantageous development of the scanner according to the invention provides that the sliding contact has an electrical resistance of less than or equal to 100 ohms, preferably of less than or equal to 1 ohm, more preferably of less than or equal to 0.01 ohms.
- the detection of the moisture content of the laundry located in the drying drum is improved. Deviations due to the electrical resistance of the sliding contact are thus substantially reduced. The detection of the moisture content is thus simplified, since a compensation of such deviations is not required or possible by simple means.
- a particularly advantageous embodiment of the scanner according to the invention provides that the sliding contact for a long-term application at a temperature of greater than or equal to 140 ° C and for a short-term application at a temperature of greater than or equal to 180 ° C is designed to be suitable. In this way, in particular, professional applications over a long period without maintenance or repair of the scanner are possible.
- FIG. 1 an embodiment of a laundry drier 2 according to the invention is partially shown in a partial sectional view.
- the tumble dryer 2 is designed as a tumble dryer for the household, so for non-professional use.
- the tumble dryer 2 has a drying drum 4, in which drum ribs 6 are arranged. At least one of the drum ribs 6 is electrically conductively connected to a first contact band 8 in a manner known to those skilled in the art.
- the first contact band 8 is arranged on an outer surface of a drum shell of the drying drum 4 and opposite the drum shell of the drying drum 4 electrically isolated.
- a second contact strip 10 is electrically conductively connected to the outer surface of the drum shell of the drying drum 4 and arranged parallel to the first contact strip 8.
- the scanner 14 has a holder 16 on which a first sliding contact 18 and a second sliding contact 20 are each mounted resiliently.
- the scanner 14 with the holder 16 and the resiliently mounted sliding contacts 18, 20 is arranged relative to the contact strips 8, 10 such that the first sliding contact 18 with its free end against the first contact band 8 and the second sliding contact 20 with its free end is pressed against the second contact strip 10.
- the two sliding contacts 18, 20 are thus at a rotation of the rotatable about a rotation axis 22 rotatably mounted on the housing 12 of the tumble dryer 2 2 drying drum 4 to the respective corresponding contact strip 8, 10 at.
- the first and the second sliding contact 18, 20 are each connected in a manner known to those skilled in electrical conduction with a control of the tumble dryer 2, not shown.
- first sliding contact 18 which abrades the first contact strip 8, which is electrically conductively connected to one of the ribs 6, and the second sliding contact 20, which abrades the second contact strip 10, which is electrically conductively connected to the outer surface of the drum shell of the drying drum 4 it is now possible to detect the moisture content of a laundry 24 located in the drying drum 4 in a manner known to those skilled in the art and to utilize it in the control of the laundry dryer 2 for controlling or regulating the laundry dryer 2.
- the first and the second sliding contact 18, 20 are made of the same material made of an electrically conductive plastic.
- the electrically conductive plastic has a sliding friction ⁇ , dynamic against steel, from about 0.1 to about 0.39. Furthermore, the electrical resistance of the electrically conductive plastic is less than 100 ohms.
- the electrically conductive plastic is also adapted for long term use at a temperature of about 140 ° C and for short term use at a temperature of about 180 ° C.
- the scanner 14 and the means for detecting the moisture content is designed such that a maintenance or repair of the Scanner 14 over the entire service life of the dryer 2, so over its entire lifetime, is not required. In this respect, customer service calls are unnecessary.
- the invention is not limited to the present embodiment.
- the invention can be advantageously used in particular in the professional field, ie in tumble dryers for professional use.
- the other sliding contact can then abut, for example, directly on the outer surface of the drum shell of the drying drum. This training is common in the professional field.
- one of the contacts of the device for detecting the moisture content of the laundry is not applied to the drum shell, but rubbing against a drum bottom of the drying drum.
- one of the contacts is not formed as a sliding contact. For example, it is conceivable to arrange such a contact on a drum cap of the drying drum.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Die Erfindung betrifft einen Abtaster (14) für eine Einrichtung zur Erfassung eines Feuchtegehalts einer in einem Wäschetrockner (2) mit einer drehbaren Trockentrommel (4) befindlichen Wäsche (24), umfassend einen Halter (16) und mindestens einen an dem Halter (16) federnd gelagerten Schleifkontakt (18, 20) zur schleifenden Anlage an einem an der Trockentrommel (4) angeordneten Kontaktband (8, 10) oder der Trockentrommel des Wäschetrockners.Um einen Abtaster (14), eine Einrichtung zur Erfassung eines Feuchtegehalts einer Wäsche (24) und einen Wäschetrockner (2) mit einer derartigen Einrichtung anzugeben, bei denen eine ordnungsgemäße Funktion der Erfassung des Feuchtegehalts der Wäsche (24) über einen langen Zeitraum gewährleistet ist, wird vorgeschlagen, dass der Schleifkontakt (18, 20) aus einem elektrisch leitfähigen Kunststoff ausgebildet ist.Ferner betrifft die Erfindung eine Einrichtung zur Erfassung eines Feuchtegehalts und einen Wäschetrockner (2) mit einer drehbaren Trockentrommel (4).The invention relates to a scanner (14) for a device for detecting a moisture content of laundry (24) located in a laundry dryer (2) with a rotatable drying drum (4), comprising a holder (16) and at least one on the holder (16) spring-mounted sliding contact (18, 20) for grinding contact on a contact belt (8, 10) arranged on the drying drum (4) or on the drying drum of the clothes dryer. and to provide a laundry dryer (2) with such a device, in which a proper function of the detection of the moisture content of the laundry (24) is ensured over a long period of time, it is proposed that the sliding contact (18, 20) be made of an electrically conductive plastic The invention further relates to a device for detecting a moisture content and a clothes dryer (2) with a rotatable one drying drum (4).
Description
Die Erfindung betrifft einen Abtaster für eine Einrichtung zur Erfassung eines Feuchtegehalts einer in einem Wäschetrockner mit einer drehbaren Trockentrommel befindlichen Wäsche der im Oberbegriff des Anspruchs 1 genannten Art, eine Einrichtung zur Erfassung eines Feuchtegehalts einer in einem Wäschetrockner mit einer drehbaren Trockentrommel befindlichen Wäsche der im Oberbegriff des Anspruchs 5 genannten Art und einen Wäschetrockner mit einer drehbaren Trockentrommel der im Oberbegriff des Anspruchs 6 genannten Art.The invention relates to a scanner for a device for detecting a moisture content of a laundry located in a tumble dryer with a rotary drying drum referred to in the preamble of claim 1, a device for detecting a moisture content of a laundry dryer located in a rotary drying drum laundry in the preamble of claim 5 type and a tumble dryer with a rotatable drying drum referred to in the preamble of
Derartige Wäschetrockner, Einrichtungen und Abtaster sind aus dem Stand der Technik bereits in vielfältigen Ausführungsformen bekannt.Such clothes dryers, devices and scanners are already known from the prior art in various embodiments.
Beispielsweise ist aus der
Der Erfindung stellt sich somit das Problem einen Abtaster, eine Einrichtung zur Erfassung eines Feuchtegehalts einer Wäsche und einen Wäschetrockner mit einer derartigen Einrichtung anzugeben, bei denen eine ordnungsgemäße Funktion der Erfassung des Feuchtegehalts der Wäsche über einen langen Zeitraum gewährleistet ist.The invention thus provides the problem of providing a scanner, a device for detecting a moisture content of a laundry and a tumble dryer with such a device, in which a proper function of detecting the moisture content of the laundry over a long period is ensured.
Erfindungsgemäß wird dieses Problem durch einen Abtaster für eine Einrichtung zur Erfassung eines Feuchtegehalts einer in einem Wäschetrockner mit einer drehbaren Trockentrommel befindlichen Wäsche mit den Merkmalen des Patentanspruchs 1 gelöst, wonach der Schleifkontakt aus einem elektrisch leitfähigen Kunststoff ausgebildet ist. Ferner wird das erfindungsgemäße Problem durch eine Einrichtung zur Erfassung eines Feuchtegehalts einer in einem Wäschetrockner mit einer drehbaren Trockentrommel befindlichen Wäsche mit den Merkmalen des Patentanspruchs 5 und einen Wäschetrockner mit einer drehbaren Trockentrommel mit den Merkmalen des Patentanspruchs 6 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention, this problem is solved by a scanner for a device for detecting a moisture content of a laundry located in a tumble dryer with a rotary drying drum with the features of claim 1, after which the sliding contact is formed of an electrically conductive plastic. Furthermore, the problem of the invention by a device for detecting a moisture content of a located in a tumble dryer with a rotary drying drum laundry with the features of claim 5 and a tumble dryer with a rotatable Drying drum solved with the features of
Der mit der Erfindung erreichbare Vorteil besteht insbesondere darin, dass eine ordnungsgemäße Funktion der Erfassung des Feuchtegehalts der Wäsche über einen langen Zeitraum gewährleistet ist. Entsprechend verlängert sich die Standzeit des erfindungsgemäßen Abtasters, der erfindungsgemäßen Einrichtung zur Erfassung des Feuchtegehalts der Wäsche und des mit einer derartigen Einrichtung ausgestatteten erfindungsgemäßen Wäschetrockners. Somit reduziert sich die Anzahl der diesbezüglichen Kundendiensteinsätze. Beispielsweise ist es denkbar, dass der erfindungsgemäße Abtaster, die erfindungsgemäße Einrichtung und der erfindungsgemäße Wäschetrockner über deren gesamte Laufzeit, also über deren Gesamtgebrauchszeitraum, in den für die Erfindung relevanten Bauteilen nicht gewartet oder repariert werden müssen.The advantage achievable with the invention is in particular that a proper function of the detection of the moisture content of the laundry is ensured over a long period of time. Accordingly, the life of the scanner according to the invention, the inventive device for detecting the moisture content of the laundry and equipped with such a device according to the invention laundry dryer extended. Thus, the number of related service calls is reduced. For example, it is conceivable that the scanner according to the invention, the device according to the invention and the tumble dryer according to the invention need not be serviced or repaired in the components relevant to the invention over their entire service life, ie over their total service life.
Die erfindungsgemäßen Vorteile gelten gleichermaßen für Haushaltsgeräte wie auch für professionelle Wäschetrockner. Insbesondere wirkt sich die Erfindung jedoch bei Wäschetrocknern für den professionellen Bereich vorteilhaft aus, da diese Wäschetrockner besonders stark beansprucht werden.
Durch die größeren Trommeldurchmessern unterliegen die Abtaster höheren Umfangsgeschwindigkeiten und legen im Vergleich zu Haushaltsgeräten eine längere Laufstrecke über die Lebensdauer ab. Die vielfältigere Anzahl der zu trocknenden Textilarten im Professional-Bereich trägt zum intensiven Verschleiß der Abtasterkohle darüber hinaus bei. Entsprechend ist eine Lösung der Verschleißproblematik bei den Schleifkontakten bei professionellen Geräten noch wichtiger als bei den Haushaltsgeräten.The advantages of the invention apply equally to household appliances as well as professional dryers. In particular, however, the invention has an advantageous effect on tumble dryers for the professional sector, since these tumble dryers are subjected to particularly high loads.
Due to the larger drum diameters, the samplers are subject to higher peripheral speeds and, compared to household appliances, have a longer running distance over the service life. The more varied number of textile types to be dried in the professional sector also contributes to the intensive wear of the scanning carbon. Accordingly, a solution to the problem of wear in the sliding contacts in professional devices even more important than in the home appliances.
Der Schleifkontakt ist als ein elektrisch leitfähiger Kunststoff ausgebildet. Elektrisch leitfähige Kunststoffe sind in einer Vielzahl von Ausführungsformen und Materialeigenschaften verfügbar und somit für eine Vielzahl von voneinander verschiedenen Anwendungsfällen vorteilhaft einsetzbar.The sliding contact is designed as an electrically conductive plastic. Electrically conductive plastics are available in a variety of embodiments and material properties and thus advantageously used for a variety of different applications.
Grundsätzlich ist der erfindungsgemäße Abtaster nach Art, Material, Dimensionierung, Form, Anordnung und Anzahl in weiten geeigneten Grenzen frei wählbar. Gleiches gilt für den mindestens einen Schleifkontakt des Abtasters.In principle, the scanner according to the invention is freely selectable in terms of type, material, dimensioning, shape, arrangement and number within wide suitable limits. The same applies to the at least one sliding contact of the scanner.
Eine vorteilhafte Weiterbildung des erfindungsgemäßen Abtasters sieht vor, dass der Schleifkontakt einen Gleitreibwert, dynamisch gegen Stahl, von kleiner oder gleich 0,6, bevorzugt von kleiner oder gleich 0,4, besonders bevorzugt von kleiner oder gleich 0,2, aufweist. Auf diese Weise ist die Reibung zwischen dem Schleifkontakt auf der einen Seite und der Trockentrommel oder dem an der Trockentrommel angeordneten Kontaktband auf der anderen Seite reduziert. Entsprechend ist auch der Verschleiß des mindestens einen Schleifkontakts wesentlich vermindert.An advantageous development of the scanner according to the invention provides that the sliding contact has a Gleitreibwert, dynamic against steel, of less than or equal to 0.6, preferably of less than or equal to 0.4, more preferably of less than or equal to 0.2. In this way, the friction between the sliding contact on the one hand and the drying drum or arranged on the drying drum contact band on the other side reduced. Accordingly, the wear of the at least one sliding contact is substantially reduced.
Eine weitere vorteilhafte Weiterbildung des erfindungsgemäßen Abtasters sieht vor, dass der Schleifkontakt einen elektrischen Widerstand von kleiner oder gleich 100 Ohm, bevorzugt von kleiner oder gleich 1 Ohm, besonders bevorzugt von kleiner oder gleich 0,01 Ohm, aufweist. Hierdurch ist die Erfassung des Feuchtegehalts der in der Trockentrommel befindlichen Wäsche verbessert. Abweichungen aufgrund des elektrischen Widerstands des Schleifkontakts sind somit wesentlich reduziert. Die Erfassung des Feuchtegehalts ist somit vereinfacht, da eine Kompensation derartiger Abweichungen nicht erforderlich oder mit einfachen Mitteln möglich ist.A further advantageous development of the scanner according to the invention provides that the sliding contact has an electrical resistance of less than or equal to 100 ohms, preferably of less than or equal to 1 ohm, more preferably of less than or equal to 0.01 ohms. As a result, the detection of the moisture content of the laundry located in the drying drum is improved. Deviations due to the electrical resistance of the sliding contact are thus substantially reduced. The detection of the moisture content is thus simplified, since a compensation of such deviations is not required or possible by simple means.
Eine besonders vorteilhafte Weiterbildung des erfindungsgemäßen Abtasters sieht vor, dass der Schleifkontakt für eine Langzeitanwendung bei einer Temperatur von größer oder gleich 140°C und für eine Kurzzeitanwendung bei einer Temperatur von größer oder gleich 180°C geeignet ausgebildet ist. Auf diese Weise sind insbesondere Anwendungen im professionellen Bereich über einen langen Zeitraum ohne Wartung oder Reparatur des Abtasters ermöglicht.A particularly advantageous embodiment of the scanner according to the invention provides that the sliding contact for a long-term application at a temperature of greater than or equal to 140 ° C and for a short-term application at a temperature of greater than or equal to 180 ° C is designed to be suitable. In this way, in particular, professional applications over a long period without maintenance or repair of the scanner are possible.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt die einzige
- Figur 1
- ein Ausführungsbeispiel eines erfindungsgemäßen Wäschetrockners, mit einer erfindungsgemäßen Einrichtung zur Erfassung eines Feuchtegehalts einer Wäsche und einem erfindungsgemäßen Abtaster, in einer teilweise geschnittenen Seitenansicht, in teilweiser Darstellung.
- FIG. 1
- An embodiment of a tumble dryer according to the invention, with a device according to the invention for detecting a moisture content of a laundry and a scanner according to the invention, in a partially sectioned side view, in partial representation.
In
An einem Gehäuse 12 des Wäschetrockners 2 ist ein als Abtastarm ausgebildeter Abtaster 14 befestigt. Der Abtaster 14 weist einen Halter 16 auf, an dem ein erster Schleifkontakt 18 und ein zweiter Schleifkontakt 20 jeweils federnd gelagert sind. Hierfür sind der erste und der zweite Schleifkontakt 18, 20 mit einem Ende des jeweiligen Schleifkontakts 18, 20 auf dem Fachmann bekannte Weise in den Halter 16 einseitig eingespannt. Der Abtaster 14 mit dem Halter 16 und den daran federnd gelagerten Schleifkontakten 18, 20 ist relativ zu den Kontaktbändern 8, 10 derart angeordnet, dass der erste Schleifkontakt 18 mit dessen freien Ende gegen das erste Kontaktband 8 und der zweite Schleifkontakt 20 mit dessen freien Ende gegen das zweite Kontaktband 10 gedrückt wird. Die beiden Schleifkontakte 18, 20 liegen somit bei einer Drehung der um eine Drehachse 22 drehbar an dem Gehäuse 12 des Wäschetrockners 2 gelagerten Trockentrommel 4 schleifend an dem jeweils korrespondierenden Kontaktband 8, 10 an.On a
Der erste und der zweite Schleifkontakt 18, 20 sind jeweils auf dem Fachmann bekannte Weise elektrisch leitend mit einer nicht dargestellten Steuerung des Wäschetrockners 2 verbunden. Mittels des ersten Schleifkontakts 18, der schleifend an dem mit einer der Rippen 6 elektrisch leitend verbundenen ersten Kontaktband 8 anliegt, und dem zweiten Schleifkontakt 20, der schleifend an dem mit der Außenfläche des Trommelmantels der Trockentrommel 4 elektrisch leitend verbundenen zweiten Kontaktband 10 anliegt, ist es nun möglich, den Feuchtegehalt einer in der Trockentrommel 4 befindlichen Wäsche 24 auf dem Fachmann bekannte Weise zu erfassen und in der Steuerung des Wäschetrockners 2 zur Steuerung oder Regelung des Wäschetrockners 2 zu verwerten.The first and the second sliding
Der erste und der zweite Schleifkontakt 18, 20 sind materialgleich aus einem elektrisch leitfähigen Kunststoff ausgebildet. Der elektrisch leitfähige Kunststoff weist einen Gleitreibwert µ, dynamisch gegen Stahl, von etwa 0,1 bis etwa 0,39 auf. Ferner beträgt der elektrische Widerstand bei dem elektrisch leitfähigen Kunststoff weniger als 100 Ohm. Der elektrisch leitfähige Kunststoff ist darüber hinaus für eine Langzeitanwendung bei einer Temperatur von etwa 140°C und für eine Kurzzeitanwendung bei einer Temperatur von etwa 180°C geeignet ausgebildet.The first and the second sliding
Mittels der Erfindung gemäß dem vorliegenden Ausführungsbeispiel ist es möglich, den Feuchtegehalt der Wäsche 24, beispielsweise zur Bestimmung der Restfeuchte der Wäsche 24, über eine sehr lange Standzeit des Abtasters 14 und damit über eine sehr lange Standzeit der Einrichtung zur Erfassung des Feuchtegehalts der Wäsche 24 und des Wäschetrockners 2 ordnungsgemäß zu erfassen und für die Steuerung oder Regelung des Wäschetrockners 2 zu verwenden. Bei dem vorliegenden Ausführungsbeispiel ist der Abtaster 14 und die Einrichtung zur Erfassung des Feuchtegehalts derart ausgebildet, dass eine Wartung oder Reparatur des Abtasters 14 über die Gesamtgebrauchsdauer des Wäschetrockners 2, also über dessen gesamte Lebenszeit, nicht erforderlich ist. Diesbezügliche Kundendiensteinsätze sind somit entbehrlich.By means of the invention according to the present embodiment, it is possible, the moisture content of the
Die Erfindung ist nicht auf das vorliegende Ausführungsbeispiel beschränkt. Beispielsweise ist die Erfindung insbesondere in dem professionellen Bereich, also bei Wäschetrocknern für den professionellen Einsatz, vorteilhaft verwendbar. Anstelle von zwei Kontaktbändern ist es auch möglich, lediglich ein einziges mit einer der Trommelrippen elektrisch leitfähig verbundenes Kontaktband zu verwenden. Der andere Schleifkontakt kann dann beispielsweise direkt auf der Außenfläche des Trommelmantels der Trockentrommel schleifend anliegen. Diese Ausbildung ist in dem professionellen Bereich üblich. Denkbar ist jedoch auch, dass einer der Kontakte der Einrichtung zur Erfassung des Feuchtegehalts der Wäsche nicht an dem Trommelmantel, sondern an einem Trommelboden der Trockentrommel schleifend anliegt. Auch ist es möglich, dass einer der Kontakte nicht als ein Schleifkontakt ausgebildet ist. Beispielsweise ist es denkbar, einen derartigen Kontakt an einer Trommelkappe der Trockentrommel anzuordnen.The invention is not limited to the present embodiment. For example, the invention can be advantageously used in particular in the professional field, ie in tumble dryers for professional use. Instead of two contact bands, it is also possible to use only a single contact strip electrically conductively connected to one of the drum ribs. The other sliding contact can then abut, for example, directly on the outer surface of the drum shell of the drying drum. This training is common in the professional field. It is also conceivable, however, that one of the contacts of the device for detecting the moisture content of the laundry is not applied to the drum shell, but rubbing against a drum bottom of the drying drum. It is also possible that one of the contacts is not formed as a sliding contact. For example, it is conceivable to arrange such a contact on a drum cap of the drying drum.
Bei einer Mehrzahl von Schleifkontakten ist es nicht zwingend erforderlich, dass die einzelnen Schleifkontakte zueinander materialgleich ausgeführt sind. Entsprechend ist es möglich, den elektrisch leitfähigen Kunststoff je nach den Erfordernissen des Einzelfalls bei der jeweiligen Paarung von Schleifkontakt und Trockentrommel oder Schleifkontakt und Kontaktband geeignet auszuwählen.In the case of a plurality of sliding contacts, it is not absolutely necessary for the individual sliding contacts to have the same material as one another. Accordingly, it is possible to suitably select the electroconductive resin according to the requirements of the case of the respective pairing of the sliding contact and the drying drum or the sliding contact and the contact band.
Claims (6)
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DE102018109894.4A DE102018109894A1 (en) | 2018-04-25 | 2018-04-25 | Scanner for a device for detecting a moisture content of a laundry, device and tumble dryer |
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EP3561173A1 true EP3561173A1 (en) | 2019-10-30 |
EP3561173B1 EP3561173B1 (en) | 2020-06-24 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6214900A (en) * | 1985-07-12 | 1987-01-23 | 株式会社東芝 | Operation controller of dryer |
DE4437635A1 (en) * | 1994-10-21 | 1996-04-25 | Miele & Cie | Laundry dryer |
EP2377989A1 (en) * | 2010-04-13 | 2011-10-19 | Electrolux Home Products Corporation N.V. | Method of assembling the drum of a laundry drier and drum for laundry driers |
Family Cites Families (1)
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DE102007039707A1 (en) * | 2007-08-22 | 2009-07-30 | Miele & Cie. Kg | Clothes dryer with a holding device |
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2018
- 2018-04-25 DE DE102018109894.4A patent/DE102018109894A1/en active Granted
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6214900A (en) * | 1985-07-12 | 1987-01-23 | 株式会社東芝 | Operation controller of dryer |
DE4437635A1 (en) * | 1994-10-21 | 1996-04-25 | Miele & Cie | Laundry dryer |
EP2377989A1 (en) * | 2010-04-13 | 2011-10-19 | Electrolux Home Products Corporation N.V. | Method of assembling the drum of a laundry drier and drum for laundry driers |
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EP3561173B1 (en) | 2020-06-24 |
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