EP0424781A2 - Sèche-linge domestique - Google Patents

Sèche-linge domestique Download PDF

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Publication number
EP0424781A2
EP0424781A2 EP19900119801 EP90119801A EP0424781A2 EP 0424781 A2 EP0424781 A2 EP 0424781A2 EP 19900119801 EP19900119801 EP 19900119801 EP 90119801 A EP90119801 A EP 90119801A EP 0424781 A2 EP0424781 A2 EP 0424781A2
Authority
EP
European Patent Office
Prior art keywords
duration
phase
laundry
ratio
during
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
Application number
EP19900119801
Other languages
German (de)
English (en)
Other versions
EP0424781A3 (en
EP0424781B1 (fr
Inventor
Armin Dipl.-Ing. Zibold (Fh)
Klaus Dipl.-Ing. Grunert (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT9090119801T priority Critical patent/ATE104709T1/de
Publication of EP0424781A2 publication Critical patent/EP0424781A2/fr
Publication of EP0424781A3 publication Critical patent/EP0424781A3/de
Application granted granted Critical
Publication of EP0424781B1 publication Critical patent/EP0424781B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • 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
    • D06F2101/02—Characteristics of laundry or load
    • D06F2101/06—Type or material
    • 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
    • D06F2101/20—Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/08—Humidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/36—Flow or velocity
    • 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
    • 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
    • D06F2105/24—Flow or velocity
    • 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
    • D06F58/46—Control of the operating time
    • 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
    • D06F58/48—Control of the energy consumption

Definitions

  • the invention relates to a household tumble dryer with a horizontally rotatably mounted laundry drum and a drive motor which at the same time drives the laundry drum and a fan, which is used to transport air flowing past a radiator through the laundry drum, and with a program sequence in at least 4 phases, namely a heating phase, a moisture expulsion phase, a post-drying phase and a cooling phase, whereby during the post-drying phase the respective duration of the drive phases in which the fan runs with the intended direction of rotation (preferred direction) is longer than the respective duration of the drive phases with the opposite direction of fan rotation (Opposite direction).
  • Such a tumble dryer is known from European patent application 328 250.
  • the drying air which is heated much higher in the opposite direction, can damage the laundry, it is stipulated that the ratio of the drive times in the preferred direction and in the opposite direction is greater than 2: 1, 4: 1 or 8: 1 should be.
  • Such a working wise helps to protect the laundry, but is only necessary as soon as the laundry is almost or completely dry.
  • such an operating mode can lead to an acceleration of the drying program even when the heating is switched off in the cooling phase.
  • the object of the invention is to further reduce the amount of heating energy required in a household tumble dryer mentioned at the outset compared to the prior art and to further shorten the time required for drying.
  • this object is achieved in that during the heating phase the duration of the preferred direction has a ratio of approximately 1:10 to approximately 1:50 compared to the duration of the opposite direction. Due to the substantial increase in the on-time of the opposite direction compared to the on-time of the preferred direction, the temperature level of the drying air can be kept very high during the heating phase without the laundry, which is contaminated with a considerable amount of water, being damaged. On the one hand, the water remaining in the laundry cannot reach a temperature higher than 100 ° C and, furthermore, the temperature at the laundry is kept considerably below 100 ° C due to the evaporation heat extraction which is already taking place at far lower temperatures. The higher temperature level during the heating phase, however, allows the washing and drying system to reach the temperature level required for the moisture phase in a considerably shorter time, so that this heating phase is considerably shorter than in the prior art. This can significantly shorten the entire drying program.
  • a further shortening of the drying program results from an advantageous development of the invention, in which, during the cooling phase, the duration of the preferred direction compared to the duration of the opposite direction has a ratio of approximately 10: 1 to approximately 50: 1.
  • the heating is not switched on during the cooling phase; only cool air is blown through the laundry.
  • it is particularly advantageous to let the blower run longer in the preferred direction than in the opposite direction.
  • a ratio of approximately 1: 5 to approximately 5: 1 can be set for the duration of the preferred direction compared to the duration of the opposite direction.
  • the selection of a ratio between the specified ratio limits can be determined, for example, by the type of laundry to be dried. This information is given by the operator when setting a drying program by actuating the handles provided for this purpose. For example, a ratio of about 1: 5 can be selected when drying cotton laundry, which is considerably more heat-resistant, while a drying ratio of about 5: 1 can be selected for drying laundry that is not so highly heat-resistant (e.g. synthetics) Duty cycle of the preferred direction compared to the opposite direction the general temperature level is lower. In the same way, ratio selections can be made depending on the amount of initial residual moisture in the laundry, i.e. the speed at which the laundry was previously spun.
  • the invention can be further developed in that the ratio can be changed smoothly or in stages from about 1: 5 to about 5: 1 in the course of the moisture expulsion phase. Since the residual moisture in the item of laundry decreases in the course of the moisture expulsion phase, the duty cycle ratio can be changed from initially, for example, 1: 5 to approximately 5: 1 towards the end of the moisture expulsion phase in order to make the temperature level in the laundry more uniform.
  • the tumble dryer shown in Fig. 1 has a laundry drum 1 which is rotatably mounted about a horizontal axis. Its front drum opening opens into a fixed porthole 2, which has on its underside an opening covered with a sieve to an exhaust air duct 3, which opens axially to an impeller 4 in the spiral housing 5.
  • the impeller is driven by an electric motor 6, on the armature shaft of which, in addition to the impeller 4, there is also a drive pinion which is partially wrapped around by a belt 7 which is stretched over the jacket of the laundry drum 1.
  • the drying air sucked out of the laundry drum is fed to a duct system 8, which can contain, for example, a condenser (not shown) in order to condense the moisture out of the exhaust air.
  • this duct system 8 can contain openings (not shown) for blowing off the exhaust air and drawing in the fresh air.
  • a heating device 10 is arranged in the supply air duct 9 and the supply air flows around it. The heated supply air finally returns through the rear drum bottom sieve 11 into the laundry drum 1.
  • the reversing operating mode of the laundry drum has proven to be advantageous so that the laundry item lying in the laundry drum and to be dried is not wound into a ball during the drying process.
  • the reversing ratio that is the duty cycle of the drive motor 6 in the clockwise direction of the drum to the duty cycle in the counterclockwise direction, is set to 1: 1.
  • the drum is moved in this way during all operating phases of the drying process.
  • the first operating phase is the so-called heating phase and is used to set the so-called static state with a temperature level at which the amount of heating heat supplied is balanced by the amount of evaporation heat absorbed when the laundry moisture evaporates.
  • This static state is maintained in the subsequent moisture expansion phase. From a certain amount of the sinking residual moisture, this absorbed amount of evaporation heat becomes so small that the temperature level in the laundry very quickly increases.
  • the post-drying phase begins, which is essentially characterized in that the temperature level maintained in the moisture expulsion phase is substantially maintained by reducing the amount of heat supplied.
  • this post-drying phase which is generally time-controlled, the residual moisture in the laundry can still be reduced to a desired value depending on its duration.
  • the cooling phase follows, in which the drying air continues to be blown through the laundry without heating. As a result, the constantly moving laundry cools down without creasing. On the other hand, this also avoids uncomfortable touching of the operator's hands with the hot laundry.
  • a blower for the drying air is generally a so-called radial blower, as shown in FIG. 2.
  • the impeller 4 has a series of at least approximately radially standing air blades, which centrifugally throws off the air hitting the impeller centrally.
  • the pressure that builds up on the circumference of the impeller 4 flows off in the direction of the arrow VS via the fan housing 5, which gradually widened in a spiral in the direction of rotation of the impeller (preferred direction VR).
  • the impeller 4 rotates in the opposite direction GR, an air flow GS also arises, but because of the unfavorable shaping of the fan housing 5 in this direction of rotation, it is considerably smaller than the preferred direction flow VS. This is also made clear by the arrows VS and GS of different lengths.
  • the ratio of the on-time of the preferred direction VR compared to the on-time of the opposite direction GR is set to about 1:10 to about 1:50 during the heating phase. As already explained above, this results in a higher temperature level of the incoming drying air during the heating phase, which means that both the moisture-laden laundry and the entire drying system heat up considerably faster than with a reversing ratio of about 1: 1 in accordance with the previous procedure. If the process sequence described in EP-A-328 250 is used, in which the duration of the preferred direction compared to the duration of the opposite direction has a ratio of at least 2: 1, the heating phase is even extended compared to the previous practice.
  • a ratio of the duty cycle of the preferred direction compared to the opposite direction of approximately 10: 1 to approximately 50: 1 during the cooling phase is particularly advantageous with regard to the shortening of the total process time.
  • the cooling air throughput through the laundry drum can be increased considerably compared to the tumble dryer known from EP-A-328 250, without the laundry thereby being damaged or even becoming entangled when shortened reversing.
  • a reversing ratio of 5: 1 to about 50: 1 has proven to be favorable, the setting of the ratio again being dependent on the type of laundry item; for cotton laundry closer to 5: 1, for synthetic laundry closer to 50: 1.
  • the temperature level of the incoming drying air can be relatively high, so that a reversing ratio of about 1: 5 can prove to be favorable.
  • this ratio can be changed slowly towards 1: 1 or beyond 1: 1 after about 5: 1 towards the end of the moisture expansion phase, at which the residual moisture reached is only comparatively low (e.g. 20%) .
  • the setting of the reversing ratio between about 1: 5 and about 5: 1 can be made alone or additionally dependent on the laundry item to be processed. This affects both the amount of laundry to be dried and the type of fabric. With a large amount with a correspondingly large amount of moisture, the reversing ratio can be closer to 1: 5 than with a smaller amount of laundry with a smaller amount of moisture. Accordingly, the reversing ratio can be 1: 5 if the laundry item to be processed consists of a temperature-resistant natural fiber, e.g. Cotton or linen. In contrast, a reversing ratio towards 5: 1 should be set if the laundry item to be processed is composed of temperature-sensitive laundry, e.g. certain synthetic fibers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detergent Compositions (AREA)
EP90119801A 1989-10-24 1990-10-16 Sèche-linge domestique Expired - Lifetime EP0424781B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9090119801T ATE104709T1 (de) 1989-10-24 1990-10-16 Haushalt-waeschetrockner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3935415A DE3935415A1 (de) 1989-10-24 1989-10-24 Haushalt-waeschetrockner
DE3935415 1989-10-24

Publications (3)

Publication Number Publication Date
EP0424781A2 true EP0424781A2 (fr) 1991-05-02
EP0424781A3 EP0424781A3 (en) 1991-08-21
EP0424781B1 EP0424781B1 (fr) 1994-04-20

Family

ID=6392107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119801A Expired - Lifetime EP0424781B1 (fr) 1989-10-24 1990-10-16 Sèche-linge domestique

Country Status (4)

Country Link
EP (1) EP0424781B1 (fr)
AT (1) ATE104709T1 (fr)
DE (2) DE3935415A1 (fr)
HK (1) HK91795A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1108812A1 (fr) * 1999-12-13 2001-06-20 BSH Bosch und Siemens Hausgeräte GmbH Sèche-linge a condensation domestique et sa méthode de mise en oeuvre
WO2008052906A2 (fr) * 2006-10-31 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour faire fonctionner un appareil électroménager destiné à l'entretien du linge
US8104191B2 (en) 2008-07-31 2012-01-31 Electrolux Home Products, Inc. Laundry dryer providing moisture application during tumbling and reduced airflow
WO2013167486A3 (fr) * 2012-05-09 2014-05-08 BSH Bosch und Siemens Hausgeräte GmbH Procédé permettant de faire fonctionner un sèche-linge à régime variable du moteur pendant une phase de chauffe et sèche-linge permettant la mise en oeuvre dudit procédé
EP2832921A1 (fr) * 2013-07-29 2015-02-04 Miele & Cie. KG Sèche-linge doté d'un entraînement monomoteur pour un tambour de lavage et ventilateur d'air de processus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008042757A1 (de) 2008-10-10 2010-04-15 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrockner und Verfahren zum Betreiben desselben

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1062258A (en) * 1963-10-01 1967-03-22 Philco Corp Improvements in or relating to domestic dryers for laundry or the like
EP0328250A1 (fr) * 1988-01-13 1989-08-16 Creda Limited Séchoir à tambour

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1062258A (en) * 1963-10-01 1967-03-22 Philco Corp Improvements in or relating to domestic dryers for laundry or the like
EP0328250A1 (fr) * 1988-01-13 1989-08-16 Creda Limited Séchoir à tambour

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1108812A1 (fr) * 1999-12-13 2001-06-20 BSH Bosch und Siemens Hausgeräte GmbH Sèche-linge a condensation domestique et sa méthode de mise en oeuvre
WO2008052906A2 (fr) * 2006-10-31 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour faire fonctionner un appareil électroménager destiné à l'entretien du linge
WO2008052906A3 (fr) * 2006-10-31 2008-06-19 Bsh Bosch Siemens Hausgeraete Procédé pour faire fonctionner un appareil électroménager destiné à l'entretien du linge
US8104191B2 (en) 2008-07-31 2012-01-31 Electrolux Home Products, Inc. Laundry dryer providing moisture application during tumbling and reduced airflow
US8276293B2 (en) 2008-07-31 2012-10-02 Electrolux Home Products, Inc. Laundry dryer providing drum rotation reversals and associated altered airflows
WO2013167486A3 (fr) * 2012-05-09 2014-05-08 BSH Bosch und Siemens Hausgeräte GmbH Procédé permettant de faire fonctionner un sèche-linge à régime variable du moteur pendant une phase de chauffe et sèche-linge permettant la mise en oeuvre dudit procédé
EP2832921A1 (fr) * 2013-07-29 2015-02-04 Miele & Cie. KG Sèche-linge doté d'un entraînement monomoteur pour un tambour de lavage et ventilateur d'air de processus

Also Published As

Publication number Publication date
HK91795A (en) 1995-06-16
DE3935415A1 (de) 1991-04-25
ATE104709T1 (de) 1994-05-15
DE59005439D1 (de) 1994-05-26
EP0424781A3 (en) 1991-08-21
EP0424781B1 (fr) 1994-04-20

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