EP0424781B1 - Sèche-linge domestique - Google Patents

Sèche-linge domestique Download PDF

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Publication number
EP0424781B1
EP0424781B1 EP90119801A EP90119801A EP0424781B1 EP 0424781 B1 EP0424781 B1 EP 0424781B1 EP 90119801 A EP90119801 A EP 90119801A EP 90119801 A EP90119801 A EP 90119801A EP 0424781 B1 EP0424781 B1 EP 0424781B1
Authority
EP
European Patent Office
Prior art keywords
duration
phase
ratio
laundry
opposite direction
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 - Lifetime
Application number
EP90119801A
Other languages
German (de)
English (en)
Other versions
EP0424781A3 (en
EP0424781A2 (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 heated much higher in the opposite direction can damage the laundry, it is specified 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 way of working contributes to protecting 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 assume 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 already beginning at far lower temperatures. However, the higher temperature level during the heating phase allows the washing and drying system to reach the temperature level required for the moisture expulsion phase in a considerably shorter time, so that this heating phase becomes significantly 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 further development of the invention, in which during the cooling phase the duration of the preferred direction has a ratio of approximately 10: 1 to approximately 50: 1 compared to the duration of the opposite direction.
  • 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 fan 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.
  • a ratio of about 1: 5 can be selected when drying cotton laundry, which can be subjected to significantly higher temperatures
  • a ratio of about 5: 1 can be selected for drying laundry that is not as highly temperature-resistant (e.g. synthetics) Duty cycle of the preferred direction compared to the opposite direction the general temperature level is lower.
  • ratio choices 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 on its underside has 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 fan wheel is driven by an electric motor 6, on the armature shaft of which, in addition to the fan wheel 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, around which the supply air flows. The heated supply air finally passes 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 phases of the drying process.
  • the first operating phase is the so-called heating phase and serves 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 essentially maintained by reducing the amount of heat supplied.
  • this post-drying phase which is generally time-controlled, the residual moisture in the laundry can 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 unpleasant touches 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 centrifugally throws off the air hitting the impeller.
  • 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 widens in the direction of rotation of the impeller (preferred direction VR).
  • the impeller 4 rotates in the opposite direction GR, there is also an air flow GS, which, however, is considerably smaller than the preferred direction flow VS because of the unfavorable shape of the fan housing 5 in this direction of rotation. This is 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 previously customary 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-up phase is even extended compared to 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 overall 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 reversing ratio can be adapt to the progress of the drying process during the moisture expulsion phase.
  • 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 expulsion phase, at which the residual moisture reached is only comparatively low (e.g. 20%) .
  • the setting of the reversing ratio between approximately 1: 5 and approximately 5: 1 can be made dependent on the laundry item to be processed, either alone or in addition. 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 item of laundry 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)

Claims (5)

  1. Sèche-linge ménager comportant un tambour à linge (1) rotatif horizontal, un moteur d'entraînement (6) qui entraîne de manière alternée simultanément le tambour à linge et un ventilateur (4) servant à faire circuler dans le tambour à linge de l'air qui passe sur un élément chauffaut (10) et un programme avec au moins quatre phases, à savoir une phase de chauffage, une phase d'élimination de l'humidité, une phase de postséchage et une phase de refroidissement, la durée des périodes pendant lesquelles le ventilateur est entraîné dans un sens de rotation déterminé (sens préférentiel) pendant la phase de post-séchage étant supérieure à la durée des périodes pendant lesquelles le ventilateur est entraîné dans le sens de rotation opposé (sens opposé), caractérisé par le fait que pendant la phase de chauffage, la durée d'entraînement dans le sens préférentiel (VR) par rapport à la durée d'entraînement dans le sens opposé (GR) se situe dans un rapport compris entre environ 1:10 et environ 1:50.
  2. Lave-linge ménager selon la revendication 1, caractérisé par le fait que pendant la phase de refroidissement, la durée d'entraînement dans le sens préférentiel (VR) par rapport à la durée d'entraînement dans le sens opposé (GR) se situe dans un rapport d'environ 10:1 à environ 50:1.
  3. Lave-linge ménager selon la revendication 1 ou 2, caractérisé par le fait que pendant la phase de post-séchage, la durée d'entraînement dans le sens préférentiel (VR) par rapport à la durée d'entraînement dans le sens opposé (GR) se situe dans un rapport d'environ 5:1 à environ 50:1.
  4. Lave-linge ménager selon l'une des revendications précédentes, caractérisé par le fait que pendant la phase d'élimination de l'humidité, la durée d'entraînement dans le sens préférentiel (VR) par rapport à la durée d'entraînement dans le sens opposé (GR) se situe dans un rapport d'environ 1:5 à environ 5:1.
  5. Lave-linge ménager selon la revendication 5, caractérisé par le fait que l'on peut faire varier de manière progressive ou par paliers le rapport d'environ 1:5 à environ 5:1 au cours de la phase d'élimination de l'humidité.
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 EP0424781A2 (fr) 1991-05-02
EP0424781A3 EP0424781A3 (en) 1991-08-21
EP0424781B1 true 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 (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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19959977A1 (de) * 1999-12-13 2001-06-21 Bsh Bosch Siemens Hausgeraete Haushaltkondenswäschetrockner und Verfahren zu seinem Betrieb
DE102006051505A1 (de) * 2006-10-31 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines Hausgeräts zur Pflege von Wäschestücken
US8104191B2 (en) 2008-07-31 2012-01-31 Electrolux Home Products, Inc. Laundry dryer providing moisture application during tumbling and reduced airflow
DE102012207741A1 (de) * 2012-05-09 2013-11-14 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betrieb eines Trockners mit variabler Motordrehzahl während einer Aufheizphase sowie hierfür geeigneter Trockner
DE102013108061A1 (de) * 2013-07-29 2015-01-29 Miele & Cie. Kg Wäschetrockner mit einem Einmotorenantrieb für die Wäschetrommel und das Prozessluftgebläse

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264750A (en) * 1963-10-01 1966-08-09 Philco Corp Dryer control apparatus
GB2214623B (en) * 1988-01-13 1991-09-11 Creda Ltd Tumble driers

Cited By (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

Also Published As

Publication number Publication date
HK91795A (en) 1995-06-16
ATE104709T1 (de) 1994-05-15
DE59005439D1 (de) 1994-05-26
EP0424781A3 (en) 1991-08-21
DE3935415A1 (de) 1991-04-25
EP0424781A2 (fr) 1991-05-02

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