EP2192224B1 - Verbesserter Wäschetrockner - Google Patents

Verbesserter Wäschetrockner Download PDF

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Publication number
EP2192224B1
EP2192224B1 EP08170117A EP08170117A EP2192224B1 EP 2192224 B1 EP2192224 B1 EP 2192224B1 EP 08170117 A EP08170117 A EP 08170117A EP 08170117 A EP08170117 A EP 08170117A EP 2192224 B1 EP2192224 B1 EP 2192224B1
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EP
European Patent Office
Prior art keywords
control loop
control
signal
airflow
temperature
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.)
Expired - Fee Related
Application number
EP08170117A
Other languages
English (en)
French (fr)
Other versions
EP2192224A1 (de
Inventor
Davide Colombo
Francesco Jatta
Davide Parachini
Cristiano Pastore
Enrico Bellinetto
Ralf Haselmeier
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Whirlpool Corp
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Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to PL08170117T priority Critical patent/PL2192224T3/pl
Priority to EP08170117A priority patent/EP2192224B1/de
Priority to ES08170117T priority patent/ES2362691T3/es
Publication of EP2192224A1 publication Critical patent/EP2192224A1/de
Application granted granted Critical
Publication of EP2192224B1 publication Critical patent/EP2192224B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F34/26—Condition of the drying air, e.g. air humidity or temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2101/00—User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2101/12—Washing temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—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
    • D06F2103/12—Temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/16—Air properties
    • D06F2105/20—Temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • 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 present invention relates to a household tumble dryer having improved performances in terms of drying cycle efficiency, energy consumption and safety. Household tumble dryers are quite popular nowadays.
  • these appliances generally comprise a rotatable drum that defines an interior drying volume for receiving a wash load to be dried.
  • the rotatable drum is actuated by an electric motor to tumble the wash load during the drying cycle.
  • Dryers may be of the vented type, in which an airflow is taken from the outside of the appliance during the drying cycle.
  • the airflow is heated by a heating element and it is forced to pass through the drying volume to remove humidity from the wash load.
  • the humid exhaust air is then blown outside.
  • the airflow follows a closed path that is fully inside the appliance. After being heated, the airflow passes through the drying volume and it is circulated to a condenser for de-humidification. Then, the airflow is conveyed to the heating element for being heated again.
  • Available dryers generally comprise a control system, which regulates the dryer operation and manages the drying cycle.
  • control system regulates the flow rate of the airflow passing though the drying volume and the temperature of the heating means to achieve desired temperature levels and ensure safety.
  • hysteresis control for which the heater is placed in the air channel and therein controlled by means of a temperature sensing element and it is switched on when the feedback temperature is below a predefined threshold and switched off when it is above a second predefined threshold in order to not exceed the safety temperature limit for the air channel.
  • the temperature within the air channel varies with a "saw-teeth" profile.
  • the average temperature within the air channel is higher than the average temperature in the drying chamber and this last is further pushed down during the drying cycle by continuous energy interruptions of the heater.
  • This behaviour is particularly critical in the final drying phase whenever the maximum power should be provided to the laundry for obtaining high quality drying performances.
  • the average temperature of the drying chamber is not optimized because it is relatively low and stays below a value that could be reached when controlling the heater, in a more stable manner, near the highest temperature limit allowed in the air channel (preferably below a temperature safety threshold). Therefore, this hysteresis control strategy results in inefficient energy consumption, which derives form a longer drying (time) process executed at lower temperature, compared to a drying cycle whenever the temperature of the heater is kept closer the predetermined upper temperature limit temperature (preferably below a temperature safety threshold), without being controlled in an (predominant) oscillating manner, as it happens with the on-off or hysteresis control.
  • the main aim of the present invention is to provide a household tumble dryer, which allows the overcoming of the drawbacks mentioned above.
  • control system is capable of offering improved performances in terms of drying cycle efficiency, drying time reduction, energy consumption reduction and control robustness.
  • the present invention provides a household tumble dryer according to the following claim 1.
  • the household tumble dryer according to the present invention comprises a control system that is provided at least with a first control loop and a second control loop, which are capable of cooperating in order to control the operation of said heating means.
  • Another object of the present invention is to provide a tumble dryer wherein the heater is controlled by means of a PI control, causing the difference between the average temperature of the air channel and the average temperature of the drying chamber (with or without laundry inside) to be minimized.
  • the present invention relates to a household tumble dryer 1, which comprises a rotatable drum 2 that is preferable actuated by an electric motor 3.
  • the rotatable drum 2 defines an interior drying volume 200 for receiving a wash load 100 for drying.
  • the drying volume 200 comprises an air inlet portion 201, through which an airflow 20 can enter the drying volume 200, and an air outlet portion 202, through which the airflow 20 exits from the drying volume 200 after having passed through it.
  • the dryer 1 is structured as a vented dryer.
  • the airflow 20 is thus taken directly from outside the dryer 1 and it is blown again in the external environment, after having passed through the drying volume 200.
  • the airflow 20 is heated by heating means 5, such as an electric heater.
  • the dryer 1 may be configured as a condensing dryer.
  • the airflow 20 follows a substantially closed loop, which is interior the dryer. After having passed through the drying volume 200, the airflow 20 is directed through condensing means 9 for dehumidification and then again to the heating means 5.
  • the correct circulation of the airflow 20 is ensured by properly positioned air ducts (not shown) and by a fan 8.
  • the dryer 1 comprises first sensor means 6A and second sensor means 6B for detecting respectively the temperature T H of the airflow 20 at the air inlet portion 201 and the temperature T A at the air outlet portion 202.
  • the temperature T H substantially coincides with the temperature of the heating means 5 while the temperature T A is substantially the actual temperature of the wash load 100.
  • the sensor means 6A-6B comprise temperature sensors that are able to provide signals indicative of the detected temperatures, e.g. thermocouples.
  • temperature sensors of different kind may be used.
  • the dryer 1 comprises a control system 7, which in general terms may be defined as the entire set of control arrangements used for controlling the dryer 1, in particular for managing the drying cycle of the dryer 1.
  • drying cycle means the sequence of steps needed for performing drying operations of the wash load 100.
  • the control system 7 preferably comprises a control unit 70, which controls the operating drying cycle of the dryer 1 by sending proper command signals 71 to the heating means 5, the motor 3 and the fan 8 and which receives from the sensor means 6A-6B signals 61 that are indicative of the temperature of the airflow 20 respectively at the air inlet and outlet portions 201, 202.
  • the control system 7 comprises also a plurality of control loops, which preferably involve the control unit 70 in their physical implementation, as it will be more apparent in the following.
  • control system 7 comprises a first control loop 51 ( figures 3 , 4 ) for regulating the temperature T H of the airflow 20 at the air inlet portion 201 and a second control loop 52 for regulating the temperature T A of the airflow 20 at the air outlet portion 202.
  • control loops 51 and 52 are configured, so as to be capable of cooperating for controlling the operation of the heating means 5.
  • the first control loop 51 receives in input a first feedback signal Y TH from the first sensor means 6A, the signal Y TH being indicative of the temperature T H .
  • the second control loop 52 instead preferably receives in input a second feedback signal Y TA from the second sensor means 6B, the signal Y TA being indicative of the temperature T A .
  • control system 7 controls the operation of the heating means 5 by means of two concurrent loops 51 and 52, which work on the base of different feedback signals.
  • the control loop 51 works on the base of a first feedback signal Y TH that is indicative of the temperature T H substantially coincident with the temperature of the heating means 5. In its control action, the first control loop 51 thus takes into account control parameters that substantially depend on the operating conditions of the heating means 5 and/or on related safety requirements.
  • the control loop 52 instead works on the base of a second feedback signal Y TA indicative of the temperature T A that substantially coincides with the actual temperature of the wash load 100. Its control action, the second control loop 52 is therefore influenced by different control parameters that substantially depend on the actual status of the wash load 100 or other environmental conditions, such as for example the actual level of lint obstruction at the outlet portion 202.
  • control loops 51 and 52 may be arranged according to different configurations and may comprise one or more logic blocks such as adders, controllers, switches and the like.
  • Said logic blocks may be hardware implemented as self standing devices or as circuits/boards of the control unit 70.
  • these logic blocks may be implemented as software programmes, modules or routines that are executed by a suitable processing unit, for example by a microprocessor (not shown) of the control unit 70.
  • control loops 51 and 52 may be arranged according to a cascade configuration, in which the control loop 51 is positioned downstream with respect to the control loop 52.
  • control loops 51 and 52 are mutually nested and they can mutually interact to control the heating means 5.
  • the first control loop 51 receives in input a first reference signal Y R1 that is provided by the second control loop 52.
  • the reference signal Y R1 may be indicative of the desired temperature for the heating means 5.
  • the reference signal Y R1 may express the temperature profile to be followed by the heating means 5 during a certain interval of the drying cycle.
  • the first loop 51 advantageously works as a retroactive loop and it thus comprises a first controller 511 that receives in input a first error signal Y E1 obtained from a first adder 512 that calculates the difference between the first reference signal Y R1 and the first feedback signal Y TH .
  • the controller 511 provides in output a first control signal Y H1 for regulating the operation of the heating means 5, which (from a logic point of view) may be represented as a logic block receiving in input the control signal Y H1 and providing in output a temperature value T H , which is detected by the first sensor means 6A that provide the feedback signal Y TH .
  • the wash load 100 may in turn be modelled as a logic block that receives in input a temperature value T H and provides in output a temperature value T A , which is detected by the second sensor means 6B that provide the feedback signal Y TA .
  • the second control loop 52 receives in input a second reference signal Y R2 that may be indicative of a desired temperature for the wash load 100.
  • the signal Y R2 may be represented by a predefined temperature profile for the wash load 100 that is selected by the control unit 7 on the base of a manual selection operated by the user or depending from other environmental conditions, such as the presence of lint obstructions at the outlet portion 202.
  • the second control loop 52 preferably comprises a second controller 521 that receives in input a second error signal Y E2 that is obtained from the difference between the second reference signal Y R2 and the second feedback signal Y TA , which difference is advantageously calculated by means of an adder 522.
  • the second controller 521 generates in output the first reference signal Y R1 for the first control loop 51.
  • first control loop 51 can be modelled as a logic block that receives in input the first reference signal Y R1 and provides in output a temperature value T A for the wash load 100.
  • the first control loop 51 retroactively regulates the operation of the heating means 5 on the base of the first reference signal Y R1 that is in turn generated by the second control loop 52 on the base of a second reference signal Y R2 that may be generated on the base of the wash load conditions and/or environmental conditions.
  • the regulation of the heating means 5 can easily take into account additional external factors that are not strictly linked to the functioning of the heating means themselves or to safety reasons.
  • control loops 51 and 52 may be arranged according to a parallel configuration.
  • each control loop 51 and 52 works in a substantially independent manner and it is selectively activated on the base of signals that are indicative of the operative status of the dryer 1.
  • the first control loop 51 may be activated in order to rapidly bring the heating means to a full functioning and quickly reach a certain temperature level T H at the inlet portion 201.
  • the second control loop 52 may be enabled and the first control loop 51 may be excluded, so to as to control the operation of the heating means 5 on the base of the temperature T A of the wash load 100, i.e. on the base of different factors such as the wash load conditions and/or environmental conditions.
  • the first control loop 51 may be again enabled if the operating conditions of the dryer 1 so requires, for example in case the temperature T H overcomes predefined safety levels.
  • the first control loop 51 receives in input a third reference signal Y R3 , which may be advantageously indicative of the desired profile temperature for the heating means 5, when the first control loop 51 is active.
  • the first control loop 51 comprises also a third controller 513 that receives in input a third error signal Y E3 , which is obtained from an adder 514 that calculates the difference between the third reference signal Y R3 and the first feedback signal Y TH coming from the first sensor means 6A.
  • the controller 513 generates in output a second control signal Y H2 for regulating the operation of the heating means 5.
  • the second control loop 52 receives in input a fourth reference signal Y R4 , which may instead be indicative of the desired temperature for the wash load 100.
  • the second control loop 52 comprises advantageously a fourth controller 523 that receives in input a fourth error signal Y E4 , which is obtained from the adder 524 that calculates the difference between the reference signal Y R4 and the second feedback signal Y TA coming from the second sensor means 6B.
  • controller 523 generates in output a third control signal Y H3 for regulating the operation of the heating means 5.
  • switching means 555 are provided, which receive in input the control signals Y H2 and Y H3 and select which control signal has to be enabled for controlling the heating means 5.
  • signals I S that are indicative of the operative status of the dryer 1.
  • said signals I S may be alarm signals coming from additional sensors (not shown) or from the sensor means 6A and/or 6B.
  • the signals I S may be command signals generated by the control unit 70.
  • the heater 5 when the temperature at the inlet portion 201 (the air channel) raises above a first predefined temperature threshold T HR1 , which is above a temperature safety limit T S , the heater 5 is energized only if the fan 8 is energized (rotated), in a synchronized manner.
  • the fan 8 is mounted on the shaft of the rotating drum, and is rotated together with drum motor 3. With these constructions and under the described conditions, the heater is energized in synchronism with the drum and with the fan 8.
  • the heater 5 can be activated also only when the airflow measurable (by means of known measurement tools) at inlet portion 201 is above a predetermined airflow threshold A TH .
  • this airflow threshold A TH corresponds to the reduced airflow achieved when the rotational direction of the drum is reversed.
  • This control method avoids that the temperature in the air channel 201, especially around the heater 5, to rise above to the safety thresholds T S , but it still maintains the temperature at an acceptable level, without sudden drops.
  • the power delivered by the heater can be controlled in order to be reduced or temporarily discontinued, with the aim to reduce the magnitude of the temperature oscillation in the air channel 20 and in order to reduce the drying time, (by maintaining an higher temperature in the air channel 20) and, as a consequence, to reduce the energy consumption.
  • the synchronized activation is not required because the temperature of the air channel is far enough from the temperature safety limit and the safety of the machine is not at risk.
  • the tumble dryer 1 according to the present invention fully allows the achievement of the intended aims and objects.
  • the drying cycle can be managed taking into account also the actual wash load conditions and other additional environmental conditions.
  • the possibility of incurring in wash load over-drying or under-drying conditions is thus dramatically reduced and the dryer 1 can work in a more efficient manner, with a lower energy consumption and a reduce drying time.
  • the adoption of retroactive control loops ensures noticeable control robustness, with high level of safety.
  • control loops 51 and 52 can work with the dryer 1 in a vented or condensing configuration, without the need of additional hardware/software resources.
  • the dryer 1 has a simple structure, which has been proven to be easy to manufacture at industrial level, at competitive costs, since standard hardware components may be used or relatively simple software procedures may be adopted.

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

Claims (15)

  1. Ein Haushaltswäschetrockner (1) umfassend:
    - eine rotierbare Trommel (2), welche ein internes Trockenvolumen (200) besitzt zum Aufnehmen einer Waschladung (100) zum Trocknen, wobei das innere Trockenvolumen einen Lufteinlassteil (201) besitzt, durch welchen ein Luftstrom (20) in das innere Trockenvolumen eintritt, und einen Luftauslassteil (202), durch welchen der Luftstrom das innere Trockenvolumen verlässt;
    - Heizmittel (5) zum Heizen des Luftstroms bevor der Luftstrom durch den Lufteinlassteil strömt;
    - erste Sensormittel (6A) zum Ermitteln der Temperatur (TH) des Luftstroms am Lufteinlassteil; und
    - zweite Sensormittel (6B) zum Ermitteln der Temperatur (TA) der Luftstroms am Luftauslassteil; und
    - ein Regelungssystem (7) zum Regeln des Betriebs des Trockners (1);
    gekennzeichnet dadurch, dass das Regelungssystem eine erste Regelungsschleife (51) zum Regulieren der Temperatur (TH) des Luftstroms am Lufteinlassteil (201) umfasst und eine zweite Regelungsschleife (52) zum Regulieren der Temperatur (TA) des Luftstroms am Luftauslassteil (202), wobei die erste Regelungsschleife und die zweite Regelungsschleife zusammenwirken, um das Heizmittel (5) zu regeln.
  2. Ein Haushaltswäschetrockner nach Anspruch 1,
    gekennzeichnet dadurch, dass die erste Regelungsschleife ein erstes Rückmeldesignal (YTH) empfängt, welches die Temperatur(TH) des Luftstroms am Lufteinlassteil anzeigt, wobei das erste Rückmeldesignal vom ersten Sensormittel bereitgestellt wird.
  3. Ein Haushaltswäschetrockner nach Ansprüchen 1 oder 2,
    gekennzeichnet dadurch, dass die zweite Regelungsschleife ein zweites Regelungssignal (YTA) empfängt, welches die Temperatur(TA) des Luftstroms am Luftauslassteil anzeigt, wobei das zweite Rückmeldesignal vom zweiten Sensormittel bereitgestellt wird.
  4. Ein Haushaltswäschetrockner nach einem oder mehreren der vorhergehenden Ansprüchen, gekennzeichnet dadurch, dass die erste Regelungsschleife und die zweite Regelungsschleife hintereinander angeordnet sind, wobei die erste Regelungsschleife bezüglich der zweiten Regelungsschleife nachgeordnet positioniert ist.
  5. Ein Haushaltswäschetrockner nach Anspruch 4,
    gekennzeichnet dadurch, dass die erste Regelungsschleife ein erstes Referenzsignal (YR1) empfängt, wobei die erste Regelungsschleife einen ersten Regler (511) umfasst, welcher ein erstes Fehlersignal (YE1) empfängt, welches aus der Differenz zwischen dem ersten Referenzsignal (YR1) und dem ersten Rückmeldesignal (YTH) bestimmt wird, wobei der erste Regler ein erstes Steuersignal (YH1) erzeugt, um das Heizmittel zu regeln.
  6. Ein Haushaltswäschetrockner nach Anspruch 5,
    gekennzeichnet dadurch, dass die zweite Regelungsschleife ein zweites Referenzsignal (YR2) empfängt, wobei die zweite Regelungsschleife einen zweiten Regler (521) umfasst, welcher ein zweites Fehlersignal (YE2) empfängt, welches aus der Differenz zwischen dem zweiten Referenzsignal (YR2) und dem zweiten Rückmeldesignal (YTA) bestimmt wird, wobei der zweite Regler das erste Referenzsignal (YR1) erzeugt.
  7. Ein Haushaltswäschetrockner nach einem oder mehreren der Ansprüche 1 bis 3, gekennzeichnet dadurch, dass die erste Regelungsschleife und die zweite Regelungsschleife parallel angeordnet sind.
  8. Ein Haushaltswäschetrockner nach Anspruch 7,
    gekennzeichnet dadurch, dass die erste Regelungsschleife oder die zweite Regelungsschleife selektiv aktiviert wird, auf Basis von Signalen (IS), welche den Arbeitszustand des Trockners anzeigen.
  9. Ein Haushaltswäschetrockner nach Anspruch 8,
    gekennzeichnet dadurch, dass die erste Regelungsschleife ein drittes Referenzsignal (YR3) empfängt, wobei die erste Regelungsschleife einen dritten Regler (513) umfasst, welcher ein drittes Fehlersignal (YE3) empfängt, welches aus der Differenz zwischen dem dritten Referenzsignal (YR3) und dem ersten Rückmeldesignal (YTH) bestimmt wird, wobei der dritte Regler ein zweites Steuersignal (YH2) erzeugt, um das Heizmittel zu regeln.
  10. Ein Haushaltswäschetrockner nach Anspruch 8 oder 9,
    gekennzeichnet dadurch, dass die zweite Regelungsschleife ein viertes Referenzsignal (YR4) empfängt, wobei die zweite Regelungsschleife einen vierten Regler (523) umfasst, welcher ein viertes Fehlersignal (YE4) empfängt, welches aus der Differenz zwischen dem vierten Referenzsignal (YR4) und dem zweiten Rückmeldesignal (YTA) bestimmt wird, wobei der zweite Regler ein drittes Steuersignal (YH3) erzeugt, um das Heizmittel zu regeln.
  11. Ein Haushaltswäschetrockner nach Ansprüchen 9 und 10,
    gekennzeichnet dadurch, dass ein Schaltmittel (555) das zweite Steuersignal (YH2) und das dritte Steuersignal (YH3) empfängt, wobei das Schaltmittel das erste Steuersignal (YH1) oder das zweite Steuersignal (YH2) auswählt, um den Betrieb des Heizmittels zu regeln.
  12. Ein Haushaltswäschetrockner nach Anspruch 11,
    gekennzeichnet dadurch, dass das Schaltmittel das zweite Steuersignal (YH2) oder das dritte Steuersignal (YH3) auswählt auf der Basis der Signale (IS), welche den Arbeitszustand des Trockners anzeigen.
  13. Ein Haushaltswäschetrockner nach einem oder mehreren der Ansprüche von 1 bis 12, gekennzeichnet dadurch, dass dieser vom Kondenstyp oder vom Belüftungstyp ist.
  14. Eine Verfahren zum Regeln des Haushaltswäschetrockners nach einem der vorhergehenden Ansprüche weiterhin umfassend einen Lüfter (8), wobei das Heizmittel (5) nur mit Energie versorgt wird, wenn die Temperatur am Einlassteil (201) über einen ersten, vordefinierten Temperaturschwellenwert (THR1) steigt.
  15. Eine Verfahren zum Regeln des Haushaltswäschetrockners nach einem der vorhergehenden Ansprüche weiterhin umfassend einen Lüfter (8), wobei das Heizmittel (5) nur mit Energie versorgt wird, wenn ein Luftstrom am Einlassteil (201) über einem vordefinierten Luftstromschwellenwert (ATH) liegt.
EP08170117A 2008-11-27 2008-11-27 Verbesserter Wäschetrockner Expired - Fee Related EP2192224B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL08170117T PL2192224T3 (pl) 2008-11-27 2008-11-27 Udoskonalona suszarka bębnowa
EP08170117A EP2192224B1 (de) 2008-11-27 2008-11-27 Verbesserter Wäschetrockner
ES08170117T ES2362691T3 (es) 2008-11-27 2008-11-27 Una secadora mejorada.

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Application Number Priority Date Filing Date Title
EP08170117A EP2192224B1 (de) 2008-11-27 2008-11-27 Verbesserter Wäschetrockner

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EP2192224A1 EP2192224A1 (de) 2010-06-02
EP2192224B1 true EP2192224B1 (de) 2011-06-01

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PL (1) PL2192224T3 (de)

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