EP2260138B1 - Clothes drier - Google Patents

Clothes drier Download PDF

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Publication number
EP2260138B1
EP2260138B1 EP09729448.2A EP09729448A EP2260138B1 EP 2260138 B1 EP2260138 B1 EP 2260138B1 EP 09729448 A EP09729448 A EP 09729448A EP 2260138 B1 EP2260138 B1 EP 2260138B1
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EP
European Patent Office
Prior art keywords
drying drum
electric motor
detected
process air
drive motor
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.)
Revoked
Application number
EP09729448.2A
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German (de)
French (fr)
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EP2260138A1 (en
Inventor
Michael Zinke
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Diehl AKO Stiftung and Co KG
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Diehl AKO Stiftung and Co KG
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Application filed by Diehl AKO Stiftung and Co KG filed Critical Diehl AKO Stiftung and Co KG
Priority to PL09729448T priority Critical patent/PL2260138T3/en
Publication of EP2260138A1 publication Critical patent/EP2260138A1/en
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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
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers
    • 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
    • D06F2103/08—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
    • D06F2103/24—Spin speed; Drum movements
    • 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
    • D06F2103/44—Current or voltage
    • D06F2103/46—Current or voltage of the motor driving the drum
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • 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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • D06F58/08—Driving arrangements

Definitions

  • the present invention relates to a tumble dryer according to the preamble of claim 1.
  • the rotary drive of the drying drum is usually carried out by a single-phase operable asynchronous motor with auxiliary winding, wherein the necessary for generating the rotating field phase shift of the current in the auxiliary winding in a known manner by series connection of a capacitor or caused by different resistance ratios of the main and auxiliary winding.
  • This drive motor for the drying drum usually runs with a fixed, load-dependent speed and also serves to drive a process air blower and a cooling air blower, as for example in the DE 199 04 993 C2 or the DE 10 2004 055 927 A1 is described.
  • this drive motor is equipped with a temperature protection switch to prevent its overheating when the drive is blocked or overloaded.
  • the temperature of the process air through the drying drum or the electrical resistance of the laundry in the drying drum to determine the degree of drying of the laundry can be detected ( DE 199 04 993 C2 ). Furthermore, it can be concluded from the behavior of a rotational speed of the drive motor during deceleration and acceleration processes on the loading amount in the drying drum ( DE 199 28 657 A1 . DE 103 05 675 B3 ).
  • a clothes dryer with the features of the preamble of claim 1 is in US 2004 0515 40 disclosed.
  • the invention has for its object to provide a clothes dryer with a rotatably mounted drying drum, which allows improved operation over known clothes dryers. Another object of the invention is to provide an improved method of operating a tumble dryer with a rotatably mounted drying drum.
  • the tumble dryer has a rotatably mounted drying drum for receiving laundry to be dried (load) and a drive motor for rotary drive of this drying drum.
  • the drive motor is a single-phase or multi-phase electric motor, which is controlled by a frequency converter.
  • the rotary drive of the drying drum can be carried out with the optimum speed for the current operation (drying program, operating state) of the tumble drier, whereby the drying process of the tumble dryer can be improved and the operational reliability of the tumble dryer can be increased ,
  • the frequency converter includes a power drive for the single- or multi-phase electric motor and a phase current measuring device for detecting the phase currents and / or phase voltages.
  • a rotational speed measuring device for detecting the rotational speed and / or a position measuring device for detecting the rotational angle of the electric motor is also provided.
  • an increased mechanical load of the electric motor can be determined, so that the electric motor can optionally be switched off before the motor winding reaches inadmissibly high temperatures.
  • a loading amount and / or type of the drying drum can be determined.
  • a degree of drying of the laundry in the drying drum can be determined. The drying process of the tumble dryer can then be optimized to the parameters thus determined.
  • a heater for heating a process air by the drying drum is further provided and this heating is associated with a switching means for switching on and off of the heater.
  • This switching means is optionally integrated in the frequency converter or in a main control of the tumble dryer.
  • a blocking of the electric motor for the drying drum can be determined, for example, so that the heater can optionally be switched off for safety reasons.
  • a faulty rotary drive of the drying drum by the electric motor eg broken or cracked belt
  • a process air blower for blowing a process air through the drying drum.
  • the drive motor of the drying drum can then also be designed to drive this process air blower in order to achieve a compact construction of the entire drive of the tumble dryer.
  • FIG. 1 a highly simplified representation of the construction of a clothes dryer according to the present invention.
  • FIG. 1 shows a drying drum 1 of a clothes dryer, which can be loaded in a known manner with laundry to be dried 3.
  • the drying drum 1 is rotatably mounted in the housing of the clothes dryer and is driven in rotation by a drive motor 4 via a belt 2.
  • the drive motor 4 for the drying drum 1 is generally a single- or multi-phase electric motor.
  • three-phase electric motors such as three-phase asynchronous motors, BLDC motors (brushless DC motors), PMAC motors (permanent magnet AC motors) or BLPM motors (brushless permanent magnet motors) are suitable without the invention on these special engine types should be limited.
  • the invention will be explained in detail below using the example of a three-phase asynchronous motor.
  • the drive motor 4 for the drying drum 1 is driven by a frequency converter 14.
  • the frequency converter 14 has a mains connection 13, a mains rectifier 11 connected thereto, a three-phase power control 8 connected downstream of the mains rectifier 11, and a DC link capacitor 10 connected between the mains rectifier 11 and the power control 8. Since the construction and operation of such a frequency converter 14 are well known to those skilled in the art, a more detailed description can be dispensed with. In addition, the skilled person will be able to easily adapt the frequency converter 14 to the respective electric motor 4 for driving the drying drum 1.
  • the frequency converter 14 is preferably coupled to a main controller 15 of the clothes dryer (e.g., by serial bus communication).
  • This main controller 15 usually includes a microcontroller and in turn is connected to an input device via which a user can select, for example, a drying program.
  • the tumble dryer furthermore has a process air blower (not shown) for blowing a process air 7 through the drying drum 1 and a heater 6 for heating this process air 7.
  • a process air blower (not shown) for blowing a process air 7 through the drying drum 1 and a heater 6 for heating this process air 7.
  • a switching means 12 is provided for switching on and off of the heater 6.
  • This switching means 12 is used in particular for the safety shutdown of the heater 6, wherein different operating states of the tumble dryer or its components may require or make desirable a heater shutdown.
  • the switching means 12 associated with the heater 6 of the process air 7 may for example be integrated in the frequency converter 14, as in the embodiment shown, or may also be arranged in the main controller 15.
  • the drive motor 4 can be used for the drying drum 1 or a separate drive motor (not shown) can be used.
  • a common drive motor 4 results in a compact design, as for example from the above-mentioned publications DE 199 04 993 C2 and DE 10 2004 055 927 A1 is known.
  • the drive motor 4 is then used in a condensation clothes dryer usually also for driving a cooling air blower (not shown) for a heat exchanger of a condensing device.
  • a drive motor 4 separate from the drive motor 4 for the drying drum 1 drive motor is used for the process air blower (and the cooling air blower).
  • this drive motor is advantageously also a single- or multi-phase electric motor used, so that the fan can be operated at variable speed.
  • the process air stream 7 can be adapted to the aerodynamic resistance of the exhaust air duct or the air flow profile can be optimized in the further program sequence.
  • an asynchronous motor which can be operated in single phase on the network with an auxiliary winding for driving the process air blower.
  • this drive motor is advantageously also used for a cooling air blower of a condensation tumble dryer. in principle but is also the use of a total of three separate drive motors for these components conceivable.
  • a speed measuring device 5 for detecting the rotational speed of the drive motor 4 and an integrated in the frequency converter 14 phase current measuring device 9 are provided for detecting the applied from the power drive 8 of the frequency converter 14 to the three phases of the drive motor 4 motor currents in this dryer.
  • the clothes dryer may additionally be provided with other sensor arrangements known from conventional clothes dryers (e.g., sensors for measuring voltage, current, power, torque, temperature, weight, etc.).
  • the two mentioned measuring devices 5 and 9 are in a multi-phase electric motor 4, which is driven by a frequency converter 14, usually present anyway, so that for the drive motor 4 of the tumble dryer, a standard motor without the need for modifications can be used (sensorless variant).
  • the heater 6 is switched by means of the switching means 12 off. This ensures that at standstill of the drying drum 1 no overheating or even ignition located near the air inlet laundry items 3 by the heater 6, which is usually operated at high power takes place.
  • the drive motor 4 is switched off via the power control 8 of the frequency converter 14 before the Motor winding reaches impermissibly high temperatures (thermal motor protection).
  • More complex speed profiles for determining the load on the determination of the moment of inertia of the drying drum are, for example, from the above-mentioned publications DE 199 28 657 A1 and DE 103 05 675 B3 known.
  • the degree of drying or dewatering of the laundry 3 in the drying drum 1 can be determined by the loading / mass inertia decreasing in the course of the drying process. This information can be used advantageously to terminate the drying process upon reaching a predetermined degree of drying or dewatering.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Description

Die vorliegende Erfindung betrifft einen Wäschetrockner nach dem Oberbegriff des Anspruchs 1.The present invention relates to a tumble dryer according to the preamble of claim 1.

Der Drehantrieb der Trockentrommel erfolgt üblicherweise durch einen einphasig am Netz betreibbaren Asynchronmotor mit Hilfswicklung, wobei die zur Erzeugung des Drehfeldes notwendige Phasenverschiebung des Stromes in der Hilfswicklung in bekannter Weise durch Reihenschaltung eines Kondensators erfolgt oder durch unterschiedliche Widerstandsverhältnisse von Haupt- und Hilfswicklung hervorgerufen wird. Dieser Antriebsmotor für die Trockentrommel läuft üblicherweise mit einer festen, lastabhängigen Drehzahl und dient gleichzeitig dem Antrieb eines Prozessluftgebläses und eines Kühlluftgebläses, wie dies zum Beispiel in der DE 199 04 993 C2 oder der DE 10 2004 055 927 A1 beschrieben ist. Im Allgemeinen ist dieser Antriebsmotor zur Vermeidung seiner Überhitzung bei blockiertem oder überlastetem Antrieb mit einem Temperaturschutzschalter ausgestattet.The rotary drive of the drying drum is usually carried out by a single-phase operable asynchronous motor with auxiliary winding, wherein the necessary for generating the rotating field phase shift of the current in the auxiliary winding in a known manner by series connection of a capacitor or caused by different resistance ratios of the main and auxiliary winding. This drive motor for the drying drum usually runs with a fixed, load-dependent speed and also serves to drive a process air blower and a cooling air blower, as for example in the DE 199 04 993 C2 or the DE 10 2004 055 927 A1 is described. In general, this drive motor is equipped with a temperature protection switch to prevent its overheating when the drive is blocked or overloaded.

Zur Optimierung des Trocknungsprozesses sind außerdem verschiedene Sensoranordnungen zum Erfassen unterschiedlicher Parameter bekannt. So können zum Beispiel die Temperatur der Prozessluft durch die Trockentrommel oder der elektrische Widerstand der Wäsche in der Trockentrommel zur Bestimmung des Trocknungsgrades der Wäsche erfasst werden ( DE 199 04 993 C2 ). Ferner kann aus dem Verhalten einer Drehzahl des Antriebsmotors während Abbrems- und Beschleunigungsvorgängen auf die Beladungsmenge in der Trockentrommel geschlossen werden ( DE 199 28 657 A1 , DE 103 05 675 B3 ).To optimize the drying process, various sensor arrangements for detecting different parameters are also known. Thus, for example, the temperature of the process air through the drying drum or the electrical resistance of the laundry in the drying drum to determine the degree of drying of the laundry can be detected ( DE 199 04 993 C2 ). Furthermore, it can be concluded from the behavior of a rotational speed of the drive motor during deceleration and acceleration processes on the loading amount in the drying drum ( DE 199 28 657 A1 . DE 103 05 675 B3 ).

Ein Wäschetrockner mit den Merkmalen des Oberbegriffs des Anspruchs 1 ist im US 2004 0515 40 offenbart.A clothes dryer with the features of the preamble of claim 1 is in US 2004 0515 40 disclosed.

Der Erfindung liegt die Aufgabe zugrunde, einen Wäschetrockner mit einer drehbar gelagerten Trockentrommel zu schaffen, der einen verbesserten Betrieb gegenüber bekannten Wäschetrocknern ermöglicht. Eine weitere Aufgabe der Erfindung ist es, ein verbessertes Verfahren zum Betrieb eines Wäschetrockners mit einer drehbar gelagerten Trockentrommel vorzusehen.The invention has for its object to provide a clothes dryer with a rotatably mounted drying drum, which allows improved operation over known clothes dryers. Another object of the invention is to provide an improved method of operating a tumble dryer with a rotatably mounted drying drum.

Diese Aufgabe wird gelöst durch einen Wäschetrockner mit den Merkmalen des Anspruchs 1 bzw. ein Verfahren zum Betrieb eines Wäschetrockners mit den Merkmalen des Anspruchs 9. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der jeweiligen abhängigen Ansprüche.This object is achieved by a tumble dryer with the features of claim 1 and a method of operating a tumble dryer with the features of claim 9. Advantageous embodiments and further developments of the invention are the subject of the respective dependent claims.

Der Wäschetrockner hat eine drehbar gelagerte Trockentrommel zur Aufnahme zu trocknender Wäsche (Beladung) und einen Antriebsmotor zum Drehantrieb dieser Trockentrommel. Erfindungsgemäß ist der Antriebsmotor ein ein- oder ein mehrphasiger Elektromotor, der von einem Frequenzumrichter angesteuert wird.The tumble dryer has a rotatably mounted drying drum for receiving laundry to be dried (load) and a drive motor for rotary drive of this drying drum. According to the invention, the drive motor is a single-phase or multi-phase electric motor, which is controlled by a frequency converter.

Da ein mittels eines Frequenzumrichters angesteuerter Elektromotor zum drehzahlveränderlichen Antrieb geeignet ist, kann der Drehantrieb der Trockentrommel jeweils mit der für den aktuellen Betrieb (Trocknungsprogramm, Betriebszustand) des Wäschetrockners optimalen Drehzahl erfolgen, wodurch der Trocknungsprozess des Wäschetrockners verbessert und die Betriebssicherheit des Wäschetrockners erhöht werden können.Since an electric motor controlled by means of a frequency converter is suitable for the variable-speed drive, the rotary drive of the drying drum can be carried out with the optimum speed for the current operation (drying program, operating state) of the tumble drier, whereby the drying process of the tumble dryer can be improved and the operational reliability of the tumble dryer can be increased ,

In einer Ausgestaltung der Erfindung enthält der Frequenzumrichter eine Leistungsansteuerung für den ein- oder mehrphasigen Elektromotor sowie eine Phasenstrom-Messvorrichtung zum Erfassen der Phasenströme und/oder Phasenspannungen. Alternativ oder bevorzugt zusätzlich ist außerdem eine Drehzahl-Messvorrichtung zum Erfassen der Drehzahl und/oder eine Positions-Messvorrichtung zum Erfassen des Drehwinkels des Elektromotors vorgesehen.In one embodiment of the invention, the frequency converter includes a power drive for the single- or multi-phase electric motor and a phase current measuring device for detecting the phase currents and / or phase voltages. Alternatively or preferably additionally, a rotational speed measuring device for detecting the rotational speed and / or a position measuring device for detecting the rotational angle of the electric motor is also provided.

Auf der Basis der erfassten Phasenströme und/oder Phasenspannungen und/oder der erfassten Drehzahl und/oder des Drehwinkels des Elektromotors ist zum Beispiel eine erhöhte mechanische Belastung des Elektromotors bestimmbar, sodass der Elektromotor gegebenenfalls abgeschaltet werden kann, bevor die Motorwicklung unzulässig hohe Temperaturen erreicht.On the basis of the detected phase currents and / or phase voltages and / or the detected rotational speed and / or the rotational angle of the electric motor, for example, an increased mechanical load of the electric motor can be determined, so that the electric motor can optionally be switched off before the motor winding reaches inadmissibly high temperatures.

Auf der Basis der erfassten Phasenströme und/oder der erfassten Phasenspannungen und/oder der erfassten Drehzahl und/oder des erfassten Drehwinkels des Elektromotors kann zum Beispiel auch eine Beladungsmenge und/oder -art der Trockentrommel bestimmt werden. Ebenso kann auf der Basis der erfassten Phasenströme und/oder der erfassten Phasenspannungen und/oder der erfassten Drehzahl und/oder des erfassten Drehwinkels des Elektromotors ein Trocknungsgrad der Wäsche in der Trockentrommel bestimmt werden. Der Trocknungsprozess des Wäschetrockners kann dann auf die so bestimmten Parameter optimiert werden.On the basis of the detected phase currents and / or the detected phase voltages and / or the detected rotational speed and / or the detected rotational angle of the electric motor, for example, a loading amount and / or type of the drying drum can be determined. Likewise, on the basis of the detected phase currents and / or the detected phase voltages and / or the detected rotational speed and / or the detected rotational angle of the electric motor, a degree of drying of the laundry in the drying drum can be determined. The drying process of the tumble dryer can then be optimized to the parameters thus determined.

In einer weiteren Ausgestaltung der Erfindung ist ferner eine Heizung zum Erwärmen einer Prozessluft durch die Trockentrommel vorgesehen und dieser Heizung ist ein Schaltmittel zum Ein- und Abschalten der Heizung zugeordnet. Dieses Schaltmittel ist wahlweise in den Frequenzumrichter oder in eine Hauptsteuerung des Wäschetrockners integriert.In a further embodiment of the invention, a heater for heating a process air by the drying drum is further provided and this heating is associated with a switching means for switching on and off of the heater. This switching means is optionally integrated in the frequency converter or in a main control of the tumble dryer.

Auf der Basis der erfassten Phasenströme und/oder der erfassten Phasenspannungen und/oder der erfassten Drehzahl und/oder des erfassten Drehwinkels des Elektromotors ist zum Beispiel ein Blockieren des Elektromotors für die Trockentrommel bestimmbar, sodass die Heizung gegebenenfalls aus Sicherheitsgründen abgeschaltet werden kann.On the basis of the detected phase currents and / or the detected phase voltages and / or the detected rotational speed and / or the detected rotational angle of the electric motor, a blocking of the electric motor for the drying drum can be determined, for example, so that the heater can optionally be switched off for safety reasons.

Ebenso kann auf der Basis der erfassten Phasenströme und/oder der erfassten Phasenspannungen und/oder der erfassten Drehzahl und/oder des erfassten Drehwinkels des Elektromotors ein fehlerhafter Drehantrieb der Trockentrommel durch den Elektromotor (z.B. gerissener oder herunter gesprungener Riemen) bestimmt werden, sodass die Heizung gegebenenfalls aus Sicherheitsgründen abgeschaltet werden kann.Likewise, on the basis of the detected phase currents and / or the detected phase voltages and / or the detected rotational speed and / or the detected rotational angle of the electric motor, a faulty rotary drive of the drying drum by the electric motor (eg broken or cracked belt) be determined so that the heater can be switched off for safety reasons, if necessary.

In einer noch weiteren Ausgestaltung der Erfindung ist ferner ein Prozessluftgebläse zum Blasen einer Prozessluft durch die Trockentrommel vorgesehen. Der Antriebsmotor der Trockentrommel kann dann auch zum Antrieb dieses Prozessluftgebläses ausgebildet sein, um eine kompakte Bauweise des gesamten Antriebs des Wäschetrockners zu erzielen.In a still further embodiment of the invention, a process air blower for blowing a process air through the drying drum is further provided. The drive motor of the drying drum can then also be designed to drive this process air blower in order to achieve a compact construction of the entire drive of the tumble dryer.

Alternativ kann für den Antrieb des Prozessluftgebläses auch ein von dem Antriebsmotor für die Trockentrommel separater Antriebsmotor vorgesehen sein. Diese Variante hat den Vorteil, dass die Drehzahlen für den Antrieb der Trockentrommel und den Antrieb des Prozessluftgebläses unabhängig voneinander und somit jeweils optimiert gesteuert werden können.Alternatively it can be provided for driving the process air blower also a separate from the drive motor for the drying drum drive motor. This variant has the advantage that the rotational speeds for driving the drying drum and the drive of the process air blower can be controlled independently of each other and thus each optimized.

Obige sowie weitere Merkmale und Vorteile der Erfindung werden aus der nachfolgenden Beschreibung eines bevorzugten, nicht-einschränkenden Ausführungsbeispiels unter Bezug auf die beiliegenden Zeichnungen besser verständlich. Darin zeigt die einzige Figur 1 eine stark vereinfachte Darstellung des Aufbaus eines Wäschetrockners gemäß der vorliegenden Erfindung.The above and other features and advantages of the invention will become more apparent from the following description of a preferred, non-limiting embodiment thereof with reference to the accompanying drawings. In it shows the only one FIG. 1 a highly simplified representation of the construction of a clothes dryer according to the present invention.

Figur 1 zeigt eine Trockentrommel 1 eines Wäschetrockners, die in bekannter Weise mit zu trocknender Wäsche 3 beladen werden kann. Die Trockentrommel 1 ist im Gehäuse des Wäschetrockners drehbar gelagert und wird durch einen Antriebsmotor 4 über einen Riemen 2 drehend angetrieben. FIG. 1 shows a drying drum 1 of a clothes dryer, which can be loaded in a known manner with laundry to be dried 3. The drying drum 1 is rotatably mounted in the housing of the clothes dryer and is driven in rotation by a drive motor 4 via a belt 2.

Bei dem Antriebsmotor 4 für die Trockentrommel 1 handelt es sich allgemein um einen ein- oder mehrphasigen Elektromotor. Für den Antriebsmotor 4 sind insbesondere dreiphasige Elektromotoren wie zum Beispiel dreiphasige Asynchronmotoren, BLDC-Motoren (bürstenlose Gleichstrom-Motoren), PMAC-Motoren (Permanentmagnet-Wechselstrom-Motoren) oder BLPM-Motoren (bürstenlose Permanentmagnet-Motoren) geeignet, ohne dass die Erfindung auf diese speziellen Motortypen beschränkt sein soll. Die Erfindung wird nachfolgend am Beispiel eines dreiphasigen Asynchronmotors beispielhaft im Detail erläutert.The drive motor 4 for the drying drum 1 is generally a single- or multi-phase electric motor. For the drive motor 4 in particular three-phase electric motors such as three-phase asynchronous motors, BLDC motors (brushless DC motors), PMAC motors (permanent magnet AC motors) or BLPM motors (brushless permanent magnet motors) are suitable without the invention on these special engine types should be limited. The invention will be explained in detail below using the example of a three-phase asynchronous motor.

Der Antriebsmotor 4 für die Trockentrommel 1 wird von einem Frequenzumrichter 14 angesteuert. Der Frequenzumrichter 14 weist zu diesem Zweck einen Netzanschluss 13, einen mit diesem verbundenen Netzgleichrichter 11, eine dem Netzgleichrichter 11 nachgeschaltete dreiphasige Leistungsansteuerung 8 sowie einen zwischen den Netzgleichrichter 11 und die Leistungsansteuerung 8 geschalteten Zwischenkreiskondensator 10 auf. Da Aufbau und Funktionsweise eines derartigen Frequenzumrichters 14 dem Fachmann hinlänglich bekannt sind, kann auf eine detailliertere Beschreibung verzichtet werden. Außerdem wird der Fachmann den Frequenzumrichter 14 problemlos an den jeweiligen Elektromotor 4 für den Antrieb der Trockentrommel 1 anpassen können.The drive motor 4 for the drying drum 1 is driven by a frequency converter 14. For this purpose, the frequency converter 14 has a mains connection 13, a mains rectifier 11 connected thereto, a three-phase power control 8 connected downstream of the mains rectifier 11, and a DC link capacitor 10 connected between the mains rectifier 11 and the power control 8. Since the construction and operation of such a frequency converter 14 are well known to those skilled in the art, a more detailed description can be dispensed with. In addition, the skilled person will be able to easily adapt the frequency converter 14 to the respective electric motor 4 for driving the drying drum 1.

Der Frequenzumrichter 14 ist vorzugsweise mit einer Hauptsteuerung 15 des Wäschetrockners gekoppelt (z.B. mittels serieller Buskommunikation). Diese Hauptsteuerung 15 enthält üblicherweise einen Mikrocontroller und ist ihrerseits mit einer Eingabevorrichtung verbunden, über welche ein Benutzer zum Beispiel ein Trockenprogramm auswählen kann.The frequency converter 14 is preferably coupled to a main controller 15 of the clothes dryer (e.g., by serial bus communication). This main controller 15 usually includes a microcontroller and in turn is connected to an input device via which a user can select, for example, a drying program.

Durch die Verwendung eines ein- oder mehrphasigen Elektromotors als Antriebsmotor 4 für die Trockentrommel 1 ist eine variable Drehzahlsteuerung möglich, sodass die Drehzahl als zusätzlicher Freiheitsgrad für unterschiedliche Trocknungsprogramme, zum Beispiel optimiert für unterschiedliche Beladungsmengen und -arten sowie Zeit- und Temperaturprofile, angepasst werden kann. Außerdem können beim Starten und Stoppen des Drehantriebs der Trockentrommel die mechanische Belastung des Antriebssystems (insbesondere des Riemens 2) sowie die Geräuschentwicklung reduziert werden.By using a single- or multi-phase electric motor as the drive motor 4 for the drying drum 1, a variable speed control is possible, so that the speed can be adjusted as an additional degree of freedom for different drying programs, for example, optimized for different loading quantities and types and time and temperature profiles , In addition, when starting and stopping the rotary drive of the drying drum, the mechanical load on the drive system (especially the belt 2) and the noise can be reduced.

Der Wäschetrockner weist ferner ein Prozessluftgebläse (nicht dargestellt) zum Blasen einer Prozessluft 7 durch die Trockentrommel 1 sowie eine Heizung 6 zum Erwärmen dieser Prozessluft 7 auf. Wie in Fig. 1 dargestellt, ist die Heizung 6 ebenfalls mit dem Netzanschluss 13 des Wäschetrockners verbunden, wobei in den Zuleitungen ein Schaltmittel 12 zum Ein- und Abschalten der Heizung 6 vorgesehen ist. Dieses Schaltmittel 12 wird insbesondere zur Sicherheitsabschaltung der Heizung 6 benutzt, wobei verschiedene Betriebszustände des Wäschetrockners bzw. seiner Komponenten eine Heizungsabschaltung erforderlich bzw. wünschenswert machen können. Das der Heizung 6 der Prozessluft 7 zugeordnete Schaltmittel 12 kann zum Beispiel in dem Frequenzumrichter 14 integriert sein, wie in dem gezeigten Ausführungsbeispiel, oder auch in der Hauptsteuerung 15 angeordnet sein.The tumble dryer furthermore has a process air blower (not shown) for blowing a process air 7 through the drying drum 1 and a heater 6 for heating this process air 7. As in Fig. 1 shown, is the heater 6 also connected to the mains connection 13 of the tumble dryer, wherein in the supply lines, a switching means 12 is provided for switching on and off of the heater 6. This switching means 12 is used in particular for the safety shutdown of the heater 6, wherein different operating states of the tumble dryer or its components may require or make desirable a heater shutdown. The switching means 12 associated with the heater 6 of the process air 7 may for example be integrated in the frequency converter 14, as in the embodiment shown, or may also be arranged in the main controller 15.

Zum Antrieb des Prozessluftgebläses kann entweder der Antriebsmotor 4 für die Trockentrommel 1 verwendet oder ein separater Antriebsmotor (nicht dargestellt) eingesetzt werden. Im erstgenannten Fall eines gemeinsamen Antriebsmotors 4 ergibt sich eine kompakte Bauweise, wie dies zum Beispiel aus den eingangs bereits genannten Druckschriften DE 199 04 993 C2 und DE 10 2004 055 927 A1 bekannt ist. Der Antriebsmotor 4 wird dann bei einem Kondensationswäschetrockner üblicherweise auch zum Antrieb eines Kühlluftgebläses (nicht dargestellt) für einen Wärmetauscher einer Kondensationseinrichtung benutzt.For driving the process air blower either the drive motor 4 can be used for the drying drum 1 or a separate drive motor (not shown) can be used. In the former case of a common drive motor 4 results in a compact design, as for example from the above-mentioned publications DE 199 04 993 C2 and DE 10 2004 055 927 A1 is known. The drive motor 4 is then used in a condensation clothes dryer usually also for driving a cooling air blower (not shown) for a heat exchanger of a condensing device.

Vorzugsweise wird für das Prozessluftgebläse (und das Kühlluftgebläse) jedoch ein vom Antriebsmotor 4 für die Trockentrommel 1 separater Antriebsmotor verwendet. Für diesen Antriebsmotor wird vorteilhafterweise ebenfalls ein ein- oder mehrphasiger Elektromotor verwendet, sodass das Gebläse mit variabler Drehzahl betrieben werden kann. Auf diese Weise können zum Beispiel der Prozessluftstrom 7 an den aerodynamischen Widerstand des Abluftkanals angepasst oder das Luftmengenprofil im weiteren Programmablauf optimiert werden. Selbstverständlich ist aber auch der Einsatz z.B. eines einphasig am Netz betreibbaren Asynchronmotors mit Hilfswicklung zum Antrieb des Prozessluftgebläses möglich. Im Fall des separaten Antriebsmotors für das Prozessluftgebläse wird dieser Antriebsmotor vorteilhafterweise auch für ein Kühlluftgebläse eines Kondensationswäschetrockners verwendet. Grundsätzlich ist aber auch der Einsatz von insgesamt drei separaten Antriebsmotoren für diese Komponenten denkbar.Preferably, however, a drive motor 4 separate from the drive motor 4 for the drying drum 1 drive motor is used for the process air blower (and the cooling air blower). For this drive motor is advantageously also a single- or multi-phase electric motor used, so that the fan can be operated at variable speed. In this way, for example, the process air stream 7 can be adapted to the aerodynamic resistance of the exhaust air duct or the air flow profile can be optimized in the further program sequence. Of course, however, it is also possible to use, for example, an asynchronous motor which can be operated in single phase on the network with an auxiliary winding for driving the process air blower. In the case of the separate drive motor for the process air blower, this drive motor is advantageously also used for a cooling air blower of a condensation tumble dryer. in principle but is also the use of a total of three separate drive motors for these components conceivable.

Durch den Einsatz separater Antriebsmotoren für die Trockentrommel 1 und das Prozessluftgebläse (sowie ggf. das Kühlluftgebläse) erhält man eine Unabhängigkeit der jeweiligen Drehzahlen. Hierdurch kann zum Beispiel ein Stillstand oder ein Rückwärtslaufen (mit geringerem aerodynamischen Wirkungsgrad) des Prozessluftgebläses in den Reversierpausen bzw. beim Reversieren vermieden werden, was sich bei einem gemeinsamen Antriebsmotor 4 zwangsläufig ergeben würde.The use of separate drive motors for the drying drum 1 and the process air blower (and possibly the cooling air blower) gives independence of the respective speeds. In this way, for example, a standstill or a reverse running (with lower aerodynamic efficiency) of the process air blower in the reversing pauses or reversing can be avoided, which would inevitably result in a common drive motor 4.

Als Sensorik sind bei diesem Wäschetrockner eine Drehzahl-Messvorrichtung 5 zum Erfassen der Drehzahl des Antriebsmotors 4 und eine in dem Frequenzumrichter 14 integrierte Phasenstrom-Messvorrichtung 9 zum Erfassen der von der Leistungsansteuerung 8 des Frequenzumrichters 14 an die drei Phasen des Antriebsmotors 4 angelegten Motorströme vorgesehen. Selbstverständlich kann der Wäschetrockner zusätzlich mit weiteren Sensoranordnungen ausgestattet sein, die aus herkömmlichen Wäschetrocknern bekannt sind (z.B. Sensoren zur Messung von Spannung, Strom, Leistung, Drehmoment, Temperatur, Gewicht, usw.).As a sensor, a speed measuring device 5 for detecting the rotational speed of the drive motor 4 and an integrated in the frequency converter 14 phase current measuring device 9 are provided for detecting the applied from the power drive 8 of the frequency converter 14 to the three phases of the drive motor 4 motor currents in this dryer. Of course, the clothes dryer may additionally be provided with other sensor arrangements known from conventional clothes dryers (e.g., sensors for measuring voltage, current, power, torque, temperature, weight, etc.).

Die beiden genannten Messvorrichtungen 5 und 9 sind bei einem mehrphasigen Elektromotor 4, der von einem Frequenzumrichter 14 angesteuert wird, üblicherweise ohnehin vorhanden, sodass für den Antriebsmotor 4 des Wäschetrockners ein Standard-Motor ohne die Notwendigkeit von Modifikationen eingesetzt werden kann (sensorlose Variante).The two mentioned measuring devices 5 and 9 are in a multi-phase electric motor 4, which is driven by a frequency converter 14, usually present anyway, so that for the drive motor 4 of the tumble dryer, a standard motor without the need for modifications can be used (sensorless variant).

Es werden nun verschiedene Betriebsabläufe des Wäschetrockners mit dem obigen Aufbau erläutert, die neben den bekannten Standard-Programmabläufen eines Wäschetrockners aufgrund der erfindungsgemäßen Konstruktion durchführbar sind.There will now be explained various operations of the clothes dryer with the above structure, which are feasible in addition to the known standard program sequences of a clothes dryer due to the construction according to the invention.

a) Sicherheitsabschaltung der Heizung bei blockiertem Antriebsmotora) Safety shutdown of the heater with blocked drive motor

Wird mittels der Drehzahl-Messvorrichtung 5 und/oder durch Auswerten der von der Phasenstrom-Messvorrichtung 9 erfassten Motorspeisegrößen ein Stillstand des Antriebsmotors 4 erkannt, obwohl durch die Leistungsansteuerung 8 des Frequenzumrichters 14 ein Drehfeld vorgegeben wird, so wird die Heizung 6 mittels des Schaltmittels 12 abgeschaltet. Hierdurch wird sichergestellt, dass beim Stillstand der Trockentrommel 1 kein Überhitzen oder gar Entzünden von in der Nähe des Lufteinlasses befindlichen Wäschestücken 3 durch die Heizung 6, welche üblicherweise mit hoher Leistung betrieben wird, stattfindet.If, by means of the rotational speed measuring device 5 and / or by evaluating the motor feed variables detected by the phase current measuring device 9, a stoppage of the drive motor 4 is detected, although a rotating field is predetermined by the power drive 8 of the frequency converter 14, then the heater 6 is switched by means of the switching means 12 off. This ensures that at standstill of the drying drum 1 no overheating or even ignition located near the air inlet laundry items 3 by the heater 6, which is usually operated at high power takes place.

b) Sicherheitsabschaltung der Heizung bei fehlerhaften Antrieb der Trockentrommelb) Safety shutdown of the heater in case of faulty drive of the drying drum

Werden während des Betriebs des Wäschetrockners mittels der Drehzahl-Messvorrichtung 5 und/oder der Phasenstrom-Messvorrichtung 9 Kenngrößen des Antriebsmotors 4 ermittelt, welche auf eine signifikant niedrige mechanische Belastung oder eine signifikant niedrige Schwankung der Ist-Drehzahl des Antriebsmotors 4 hindeuten, so wird die Heizung 6 mittels des Schaltmittels 12 abgeschaltet. Dies ist notwendig, da sich in einem solchen Fall die Trockentrommel 1 offensichtlich nicht mehr dreht, was durch einen gerissenen oder herunter gesprungenen Riemen 2 verursacht sein kann. Auch in diesem Fall kann somit ein Überhitzen oder gar Entzünden von Wäschestücken 3 in der Nähe des Lufteinlasses der Trockentrommel 1 sicher vermieden werden.If characteristic values of the drive motor 4 are determined during operation of the tumble dryer by means of the rotational speed measuring device 5 and / or the phase current measuring device 9, which indicate a significantly low mechanical load or a significantly low fluctuation of the actual rotational speed of the drive motor 4, the Heater 6 is turned off by means of the switching means 12. This is necessary because in such a case, the drying drum 1 is obviously no longer rotating, which may be caused by a broken or broken belt 2. In this case as well, overheating or even ignition of laundry items 3 in the vicinity of the air inlet of the drying drum 1 can thus be reliably avoided.

c) Sicherheitsabschaltung des Antriebsmotors bei Überlastc) Safety shutdown of the drive motor in case of overload

Werden während des Betriebs des Wäschetrockners mittels der Drehzahl-Messvorrichtung 5 und/oder der Phasenstrom-Messvorrichtung 9 Kenngrößen des Antriebsmotors 4 ermittelt, welche auf eine überhöhte mechanische Belastung des Antriebsmotors 4 hindeuten, so wird der Antriebsmotor 4 über die Leistungsansteuerung 8 des Frequenzumrichters 14 abgeschaltet, bevor die Motorwicklung unzulässig hohe Temperaturen erreicht (thermischer Motorschutz).If characteristic values of the drive motor 4 are determined during operation of the tumble dryer by means of the speed measuring device 5 and / or the phase current measuring device 9, which indicate an excessive mechanical load of the drive motor 4, the drive motor 4 is switched off via the power control 8 of the frequency converter 14 before the Motor winding reaches impermissibly high temperatures (thermal motor protection).

d) Beladungsmessung (Menge und Art)d) Load measurement (quantity and type)

Werden während des Betriebs des Wäschetrockners mittels der Drehzahl-Messvorrichtung 5 und/oder der Phasenstrom-Messvorrichtung 9 Kenngrößen des Antriebsmotors 4 ermittelt, so kann man aus deren Absolutwerten Rückschlüsse auf die Beladungsmenge der Trockentrommel 1 (z.B. höher Leistung -> größere Beladungsmenge) und aus deren Schwankungsbreiten Rückschlüsse auf die Art der Beladung 3 der Trockentrommel 1 (z.B. große Drehzahlschwankungen -> große Wäschestücke) ziehen. Diese Informationen lassen sich in vorteilhafter Weise zur Optimierung des weiteren Programmablaufs (Temperaturprofil, Zeitprofil, etc.) verwenden. Dieses Verfahren kann entweder vom Frequenzumrichter 14 selbst oder unter Einbeziehung der gegebenenfalls zusätzlich vorhandenen Hauptsteuerung 15 ausgeführt und ausgewertet werden.If characteristic values of the drive motor 4 are determined during operation of the tumble dryer by means of the rotational speed measuring device 5 and / or the phase current measuring device 9, conclusions can be drawn from the absolute values of the loading quantity of the drying drum 1 (eg higher power -> larger load quantity) and off whose fluctuation ranges draw conclusions about the type of loading 3 of the drying drum 1 (eg large speed fluctuations -> large items of laundry). This information can be advantageously used to optimize the further program sequence (temperature profile, time profile, etc.). This method can be carried out and evaluated either by the frequency converter 14 itself or with the involvement of the possibly additionally present main controller 15.

Komplexere Drehzahlprofile zur Ermittlung der Beladung über die Bestimmung des Massenträgheitsmoments der Trockentrommel sind zum Beispiel aus den eingangs bereits erwähnten Druckschriften DE 199 28 657 A1 und DE 103 05 675 B3 bekannt.More complex speed profiles for determining the load on the determination of the moment of inertia of the drying drum are, for example, from the above-mentioned publications DE 199 28 657 A1 and DE 103 05 675 B3 known.

e) Bestimmung des Trocknungs- / Entwässerungsgrades der Wäschee) Determination of the degree of drying / dewatering of the laundry

Wird die oben beschriebene Beladungsmessung nicht nur einmalig (am Programmanfang), sondern kontinuierlich während des Trocknungsvorgangs durchgeführt, so kann über die im Laufe des Trocknungsprozesses abnehmende Beladung / Massenträgheit der Trocknungs- bzw. Entwässerungsgrad der Wäsche 3 in der Trockentrommel 1 bestimmt werden. Diese Information lässt sich in vorteilhafter Weise zum Beenden des Trocknungsvorgangs bei Erreichen eines vorgegebenen Trocknungs- bzw. Entwässerungsgrades verwenden.If the load measurement described above is carried out not only once (at the start of the program) but continuously during the drying process, then the degree of drying or dewatering of the laundry 3 in the drying drum 1 can be determined by the loading / mass inertia decreasing in the course of the drying process. This information can be used advantageously to terminate the drying process upon reaching a predetermined degree of drying or dewatering.

BEZUGSZIFFERNLISTEREFERENCE NUMBER LIST

11 Trockentrommeldry drum 22 Riemenbelt 33 Wäsche / BeladungLaundry / load 44 Elektromotorelectric motor 55 Drehzahl-MessvorrichtungSpeed measuring device 66 Heizungheater 77 Prozessluftprocess air 88th Leistungsansteuerungpower control 99 Phasenstrom-MessvorrichtungPhase current measurement device 1010 ZwischenkreiskondensatorLink capacitor 1111 NetzgleichrichterMains rectifier 1212 Schaltmittelswitching means 1313 Netzanschlussmains connection 1414 Frequenzumrichterfrequency converter 1515 Hauptsteuerungmain control

Claims (16)

  1. Clothes drier with a rotatably mounted drying drum (1) for accommodating clothes (3) to be dried and a drive motor (4) for rotational driving of the drying drum (1), wherein the drive motor (4) is a single-phase or a polyphase electric motor; and wherein a frequency converter (14) is provided.for activating the electric motor (4), characterized in that the frequency converter (14) contains a power activation device (8) for the single-phase or polyphase electric motor (4) and a phase current measurement apparatus (9) for detecting the phase currents and/or phase voltages.
  2. Clothes drier according to Claim 1, characterized in that, in addition, a speed measurement apparatus (5) for detecting the speed and/or a position measurement apparatus for detecting the rotary angle of the electric motor (4) is/are provided.
  3. Clothes drier according to Claim 1 or 2, characterized in that, in addition, a heater (6) for heating a process air (7) through the drying drum (1) is provided; and
    in that a switching means (12) for switching the heater on and off is associated with the heater (6).
  4. Clothes drier according to Claim 3, characterized in that the switching means (12) for the heater (6) is integrated in the frequency converter (4).
  5. Clothes drier according to Claim 3, characterized in that the switching means (12) for the heater (6) is integrated in a main controller (15) of the clothes drier.
  6. Clothes drier according to one of Claims 1 to 5, characterized in that, in addition, a process air fan for blowing a process air (7) through the drying drum (1) is provided; and
    in that the drive motor (4) of the drying drum (1) is also designed to drive the process air fan.
  7. Clothes drier according to one of Claims 1 to 5, characterized in that, in addition, a process air fan for blowing a process air (7) through the drying drum (1) is provided; and
    in that a drive motor which is separate from the drive motor (4) for the drying drum (1) is provided for driving the process air fan.
  8. Method for operating a clothes drier with a rotatably mounted drying drum (1) for accommodating clothes (3) to be dried and a drive motor (4) for rotary driving of the drying drum (1), wherein the drive motor (4) is a single-phase or a polyphase electric motor; and wherein the electric motor (4) is activated by a frequency converter (14), characterized in that the frequency converter (14) detects the phase currents and/or the phase voltages for the single-phase or polyphase electric motor (4).
  9. Method according to Claim 8, characterized in that, in addition, a speed and/or a rotary angle of the electric motor (4) is/are detected.
  10. Method according to Claim 8 or 9, characterized in that an increased mechanical load on the electric motor (4) can be determined on the basis of the detected phase currents and/or the detected phase voltages and/or the detected speed and/or the detected rotary angle of the electric motor (4); and
    in that, in the event of the determination of an increased mechanical load on the electric motor (4), the electric motor (4) is disconnected.
  11. Method according to one of Claims 8 to 10, characterized in that a load quantity and/or a load type of the drying drum (1) is determined on the basis of the detected phase currents and/or the detected phase voltages and/or the detected speed and/or the detected rotary angle of the electric motor (4).
  12. Method according to one of Claims 8 to 11, characterized in that a degree of drying or a degree of water removal of/from the clothes (3) in the drying drum (1) is determined on the basis of the detected phase currents and/or the detected phase voltages and/or the detected speed and/or the detected rotary angle of the electric motor (4).
  13. Method according to one of Claims 8 to 12, characterized in that, in addition, a heater (6) for heating a process air (7) through the drying drum (1) is provided; in that blocking of the electric motor (4) can be determined on the basis of the detected phase currents and/or the detected phase voltages and/or the detected speed and/or the detected rotary angle of the electric motor (4); and in that, in the event of the determination of blocking of the electric motor (4), the heater (6) is disconnected.
  14. Method according to one of Claims 8 to 13, characterized in that, in addition, a heater (6) for heating a process air (7) through the drying drum (1) is provided; in that faulty rotary driving of the drying drum (1) by the electric motor (4) can be determined on the basis of the detected phase currents and/or the detected phase voltages and/or the detected speed and/or the detected rotary angle of the electric motor (4); and in that, in the event of the determination of faulty rotary driving of the drying drum (1) by the electric motor (4), the heater (6) is disconnected.
  15. Method according to one of Claims 8 to 14, characterized
    in that, in addition, a process air fan for blowing a process air (7) through the drying drum (1) is provided; and in that the process air fan is likewise driven by the drive motor (4) for the drying drum (1).
  16. Method according to one of Claims 8 to 14, characterized in that, in addition, a process air fan for blowing a process air (7) through the drying drum (1) is provided; and in that the process air fan is driven by a drive motor which is separate from the drive motor (4) for the drying drum (1).
EP09729448.2A 2008-04-11 2009-04-08 Clothes drier Revoked EP2260138B1 (en)

Priority Applications (1)

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PL09729448T PL2260138T3 (en) 2008-04-11 2009-04-08 Clothes drier

Applications Claiming Priority (2)

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DE102008018356A DE102008018356A1 (en) 2008-04-11 2008-04-11 clothes dryer
PCT/EP2009/002583 WO2009124736A1 (en) 2008-04-11 2009-04-08 Clothes drier

Publications (2)

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EP2260138A1 EP2260138A1 (en) 2010-12-15
EP2260138B1 true EP2260138B1 (en) 2013-06-12

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US (1) US20110023322A1 (en)
EP (1) EP2260138B1 (en)
DE (1) DE102008018356A1 (en)
ES (1) ES2425494T3 (en)
PL (1) PL2260138T3 (en)
WO (1) WO2009124736A1 (en)

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DE10305675B3 (en) * 2003-02-12 2004-05-27 Diehl Ako Stiftung & Co. Kg Drum loading determination method for laundry machine using measured electrical power requirements of electric drive motor for loaded laundry drum
CN100417004C (en) * 2003-07-23 2008-09-03 松下电器产业株式会社 Motor controlling equipment and washer and dryer using the same
JP4254472B2 (en) * 2003-10-15 2009-04-15 パナソニック株式会社 Washing machine
DE10361405A1 (en) * 2003-12-29 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Laundry treatment device with a control arrangement for operating an electric motor
WO2006042382A1 (en) * 2004-10-22 2006-04-27 Alliance International, Besloten Vennootschap Met Beperkte Aansprakelijkheid Washing machine, dryer or the like comprising a rotatable drum shield
DE102004055927A1 (en) 2004-11-19 2006-05-24 BSH Bosch und Siemens Hausgeräte GmbH Condensing washer dryer has motor fixed in base with shafts to drive both drum and fan that is partly encapsulated by bearing shield

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2281935A1 (en) 2009-08-07 2011-02-09 BSH Bosch und Siemens Hausgeräte GmbH Laundry appliance with an electric motor

Also Published As

Publication number Publication date
WO2009124736A1 (en) 2009-10-15
US20110023322A1 (en) 2011-02-03
PL2260138T3 (en) 2013-11-29
ES2425494T3 (en) 2013-10-15
DE102008018356A1 (en) 2009-10-15
EP2260138A1 (en) 2010-12-15

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