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EP0761864B1 - Method and machine for drying the laundry - Google Patents

Method and machine for drying the laundry Download PDF

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Publication number
EP0761864B1
EP0761864B1 EP96401864A EP96401864A EP0761864B1 EP 0761864 B1 EP0761864 B1 EP 0761864B1 EP 96401864 A EP96401864 A EP 96401864A EP 96401864 A EP96401864 A EP 96401864A EP 0761864 B1 EP0761864 B1 EP 0761864B1
Authority
EP
European Patent Office
Prior art keywords
drying
speed
laundry
drum
improved
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
EP96401864A
Other languages
German (de)
French (fr)
Other versions
EP0761864A1 (en
Inventor
Daniel Remeur
Pascal Chabanne
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.)
Esswein SA
Original Assignee
Esswein SA
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 Esswein SA filed Critical Esswein SA
Publication of EP0761864A1 publication Critical patent/EP0761864A1/en
Application granted granted Critical
Publication of EP0761864B1 publication Critical patent/EP0761864B1/en
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
    • D06F58/30—Drying processes 
    • 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
    • D06F2103/34—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
    • D06F2103/44—Current or voltage
    • 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
    • D06F58/32—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 subject of the present invention is a drying process improved linen and a machine using it.
  • the subject of the present invention is a method allowing improve the drying of laundry in a washer-dryer machine or drying, decreasing, at equal efficiency, the drying time, and this, as simply as possible.
  • the present invention also relates to a machine implementing the method of the invention.
  • the process of the invention consists, in the drying phase of the laundry, rotating the drum at an "improved drying" speed slightly lower than the centrifugation speed of its contents. In a way advantageous, this speed is between 65 and 70 revolutions / min approximately.
  • the phase has several stages, during each of which the drum rotation speed is different from one step to the next, advantageously by alternating steps at higher speed, at high speed equal and at lower speed than the speed of "improved drying".
  • the speed can vary, for example, by a speed minimum of about 35 to 50 rpm at a maximum speed of about 70 to 100 rpm.
  • the present invention relates equally to machines washer-dryers than only drying machines, these machines can be front loading or top loading. For simplify, in the following description, they will be qualified only as machines.
  • the machine 1 represented in FIGS. 1 and 2, comprises, between others, a drum 2 rotating around its axis 3 in a tank 4.
  • the hot air circulation circuit of the machine 1 comprises a turbine 5 of which the air suction pipe 6 is connected to the upper part of the tank 4, and whose air injection pipe 7 is connected to the tank, coaxially with axis 3.
  • the other parts of the mixing circuit hot air have not been shown.
  • the "pipe” 9 has a diameter which depends on the speed of rotation of the drum, and which is equal or slightly greater than the diameter of the pipe 7.
  • the laundry items near hose 9 are much less subject to centrifugal force than those which are further away from this pipe, and can move relative to others pieces of laundry, migrating from the axis to the periphery of the drum, ensuring thus a brewing of linen and improving the uniformity of drying.
  • the speed drum rotation in drying mode is not maintained constant. It can vary in stages or gradually around the improved drying speed, between two limits which are for example 35 rpm and approximately 100 rpm, and can alternately increase and decrease between these two limits. It is advantageous to plan short breaks during the drying phase, allowing the laundry to fall to the bottom of the drum when it stops, and be distributed differently when the drum resumes rotation.
  • the different speed steps or different drum rotation speeds can correspond to different stages of drying the laundry: start, middle and end of drying, and linen cooling. At each stop, the drum can change direction rotation, so as not to tangle the laundry, to promote uniformity drying and limit wrinkling of this laundry.

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

Description

La présente invention a pour objet un procédé de séchage amélioré du linge et une machine le mettant en oeuvre.The subject of the present invention is a drying process improved linen and a machine using it.

Dans la plupart des machines lavantes-séchantes ou séchantes actuelles, l'air chaud est injecté au centre du tambour et doit sortir par la périphérie de ce tambour. Cependant, assez souvent, le linge s'agglomère en un tas qui obture le centre du tambour pendant la phase de séchage, empêchant ainsi l'entrée normale de l'air chaud dans le tambour, ainsi que l'évacuation correcte de l'air chaud ayant pu pénétrer dans le centre du tambour, et qui passe par un "court-circuit", c'est à dire sort aussitôt du tambour en traversant le minimum de linge.In most washer-dryer or dryer machines hot air is injected into the center of the drum and must exit through the periphery of this drum. However, quite often, the laundry agglomerates in a pile which closes the center of the drum during the drying phase, thus preventing the normal entry of hot air into the drum, as well as the correct evacuation of hot air that may have entered the center of the drum, and which goes through a "short circuit", that is to say immediately leaves the drum through the minimum amount of laundry.

On connaít d'après le document DE-A-30 17 109 un sêche-linge, dont on augmente momentanément la vitesse du tambour à une valeur (200 à 450 t/min) ne permettant pas de détasser correctement le linge, qui est plaqué contre le tambour.We know from document DE-A-30 17 109 a dryer, which the drum speed is temporarily increased to a value (200 at 450 rpm) does not allow the laundry to be properly loosened, which is pressed against the drum.

La présente invention a pour objet un procédé permettant d'améliorer le séchage du linge d'une machine lavante-séchante ou séchante, en diminuant, à efficacité égale, le temps de séchage, et ce, le plus simplement possible. La présente invention a également pour objet une machine mettant en oeuvre le procédé de l'invention.The subject of the present invention is a method allowing improve the drying of laundry in a washer-dryer machine or drying, decreasing, at equal efficiency, the drying time, and this, as simply as possible. The present invention also relates to a machine implementing the method of the invention.

Le procédé de l'invention consiste, en phase de séchage du linge, à faire tourner le tambour à une vitesse "de séchage amélioré" légèrement inférieure à la vitesse de centrifugation de son contenu. De façon avantageuse, cette vitesse est comprise entre 65 et 70 tours/min environ.The process of the invention consists, in the drying phase of the laundry, rotating the drum at an "improved drying" speed slightly lower than the centrifugation speed of its contents. In a way advantageous, this speed is between 65 and 70 revolutions / min approximately.

Selon un aspect avantageux du procédé de l'invention, la phase de séchage comporte plusieurs étapes, pendant chacune desquelles la vitesse de rotation du tambour est différente d'une étape à la suivante, avantageusement en alternant des étapes à vitesse supérieure, à vitesse égale et à vitesse inférieure à la vitesse de "séchage amélioré". Dans une même étape de séchage, la vitesse peut varier, par exemple, d'une vitesse minimale d'environ 35 à 50 t/min à une vitesse maximale d'environ 70 à 100 t/min. According to an advantageous aspect of the process of the invention, the phase has several stages, during each of which the drum rotation speed is different from one step to the next, advantageously by alternating steps at higher speed, at high speed equal and at lower speed than the speed of "improved drying". In same drying step, the speed can vary, for example, by a speed minimum of about 35 to 50 rpm at a maximum speed of about 70 to 100 rpm.

La présente invention sera mieux comprise à la lecture de la description détaillée d'un mode de réalisation, pris à titre d'exemple non limitatif et illustré par le dessin annexé, sur lequel :

  • les figures 1 et 2 sont respectivement une vue schématisée de côté et une vue schématisée de dessus d'une machine lavante-séchante de l'art antérieur en phase de séchage de linge, et
  • les figures 3 et 4 sont respectivement une vue schématisée de côté et une vue schématisée de dessus d'une machine lavante-séchante conforme à l'invention, en phase de séchage de linge.
The present invention will be better understood on reading the detailed description of an embodiment, taken by way of nonlimiting example and illustrated by the appended drawing, in which:
  • FIGS. 1 and 2 are respectively a schematic side view and a schematic top view of a washer-dryer machine of the prior art in the laundry drying phase, and
  • Figures 3 and 4 are respectively a schematic side view and a schematic top view of a washer-dryer machine according to the invention, in the laundry drying phase.

La présente invention se rapporte aussi bien aux machines lavantes-séchantes qu'aux machines seulement séchantes, ces machines pouvant être à chargement frontal ou à chargement par le dessus. Pour simplifier, dans la suite de la description, on les qualifiera uniquement de machines.The present invention relates equally to machines washer-dryers than only drying machines, these machines can be front loading or top loading. For simplify, in the following description, they will be qualified only as machines.

La machine 1, représentée en figures 1 et 2, comporte, entre autres, un tambour 2 tournant autour de son axe 3 dans une cuve 4. Le circuit de brassage d'air chaud de la machine 1 comporte une turbine 5 dont la conduite d'aspiration d'air 6 est reliée à la partie supérieure de la cuve 4, et dont la conduite d'injection d'air 7 est reliée à la cuve, coaxialement à l'axe 3. Pour simplifier le dessin, les autres parties du circuit de brassage d'air chaud (éléments chauffants et condenseur) n'ont pas été représentés.The machine 1, represented in FIGS. 1 and 2, comprises, between others, a drum 2 rotating around its axis 3 in a tank 4. The hot air circulation circuit of the machine 1 comprises a turbine 5 of which the air suction pipe 6 is connected to the upper part of the tank 4, and whose air injection pipe 7 is connected to the tank, coaxially with axis 3. To simplify the drawing, the other parts of the mixing circuit hot air (heating elements and condenser) have not been shown.

Dans une machine de l'art antérieur (figures 1 et 2), le tambour tourne, en régime de séchage, à la même vitesse qu'en régime de lavage ou de rinçage (dans le cas d'une machine lavante), ce qui permet de simplifier la commande du moteur d'entraínement du tambour. Ceci a pour effet, lorsque la quantité de linge à sécher est telle que ce linge remplit au moins la moitié du tambour (à l'arrêt du celui-ci), de rassembler le linge 8 en une masse relativement compacte qui obstrue au moins partiellement la conduite d'injection d'air chaud 7. Il en résulte que l'air chaud arrivant par la conduite 7 dans le tambour suit un trajet de "court-circuit" entre la conduite 7 et la conduite 6, c'est à dire qu'il longe la paroi latérale du tambour 2 proche de la conduite 7 en traversant à peine le linge 8 qui est trop tassé pour offrir un passage à cet air chaud.In a machine of the prior art (Figures 1 and 2), the drum rotates in drying mode at the same speed as in washing mode or of rinsing (in the case of a washing machine), which makes it possible to simplify the control of the drum drive motor. This has the effect, when the quantity of laundry to be dried is such that the laundry fills at least half of the drum (when it stops), gather the laundry 8 in one relatively compact mass that at least partially obstructs the pipe hot air injection 7. As a result, the hot air arriving through the pipe 7 in the drum follows a "short circuit" path between the pipe 7 and the line 6, that is to say it runs along the side wall of the drum 2 close to the line 7 barely crossing the laundry 8 which is too tightly packed to offer a passage to this hot air.

Par contre, grâce au procédé de l'invention, (figures 3 et 4) selon lequel on fait tourner le tambour, en phase de séchage, à une vitesse de "séchage amélioré" inférieure à la vitesse de centrifugation de son contenu, fonction du diamètre du tambour, d'environ 65 à 70 t/min, on répartit sensiblement uniformément le linge 8' en couronne autour d'un "tuyau" central 9 vide de linge, qui constitue le prolongement de la conduite 7. L'air chaud passe naturellement dans ce tuyau 9 et traverse le linge 8' dans tout son volume, puisque celui-ci, du fait qu'il est beaucoup moins tassé que dans le cas précédent (figures 1 et 2), offre relativement peu de résistance au passage de l'air chaud. En outre, du fait qu'il est moins tassé, le linge est moins froissé après séchage. Le "tuyau" 9 a un diamètre qui dépend de la vitesse de rotation du tambour, et qui est égal ou légèrement supérieur au diamètre de la conduite 7. Ainsi, par rapport à l'art antérieur, on améliore le séchage du linge et on diminue le temps de séchage à degré de séchage égal, et par conséquent on diminue aussi la consommation en énergie électrique. De plus, les pièces de linge se trouvant près du tuyau 9 sont beaucoup moins sujettes à la force centrifuge que celles qui sont les plus éloignées de ce tuyau, et peuvent se déplacer par rapport aux autres pièces de linge, en migrant de l'axe vers la périphérie du tambour, assurant ainsi un brassage de linge et améliorant l'homogénéité du séchage.On the other hand, thanks to the method of the invention, (Figures 3 and 4) according to which the drum is rotated, in the drying phase, at a speed of "improved drying" lower than the speed of centrifugation of its content, depending on the diameter of the drum, about 65 to 70 rpm, we distributes the linen 8 ′ in a substantially uniform fashion around a central "pipe" 9 empty of linen, which constitutes the extension of the pipe 7. The hot air naturally passes through this pipe 9 and passes through the laundry 8 ' in all its volume, since this one, of the fact that it is much less packed as in the previous case (Figures 1 and 2), offers relatively little resistance to the passage of hot air. In addition, because it is less packed, the laundry is less wrinkled after drying. The "pipe" 9 has a diameter which depends on the speed of rotation of the drum, and which is equal or slightly greater than the diameter of the pipe 7. Thus, compared to the prior art, we improves the drying of the laundry and the drying time is reduced to a degree equal drying, and therefore the consumption in electric energy. In addition, the laundry items near hose 9 are much less subject to centrifugal force than those which are further away from this pipe, and can move relative to others pieces of laundry, migrating from the axis to the periphery of the drum, ensuring thus a brewing of linen and improving the uniformity of drying.

Selon un aspect avantageux du procédé de l'invention, la vitesse de rotation du tambour en régime de séchage n'est pas maintenue constante. Elle peut varier par paliers ou progressivement autour de la vitesse de séchage amélioré, entre deux limites qui sont par exemple 35 t/mm et 100 t/min environ, et peut alternativement augmenter et diminuer entre ces deux limites. On peut avantageusement prévoir de courtes pauses durant la phase de séchage, permettant au linge de retomber au fond du tambour à l'arrêt de celui-ci, et de se répartir différemment lorsque le tambour reprend sa rotation. Les différents paliers de vitesse ou les différentes vitesses de rotation du tambour peuvent correspondre à différentes étapes de séchage du linge : début, milieu et fin du séchage, et refroidissement du linge. A chaque arrêt, le tambour peut changer de sens de rotation, de manière à ne pas emmêler le linge, à favoriser l'homogénéité du séchage et à limiter le froissage de ce linge.According to an advantageous aspect of the process of the invention, the speed drum rotation in drying mode is not maintained constant. It can vary in stages or gradually around the improved drying speed, between two limits which are for example 35 rpm and approximately 100 rpm, and can alternately increase and decrease between these two limits. It is advantageous to plan short breaks during the drying phase, allowing the laundry to fall to the bottom of the drum when it stops, and be distributed differently when the drum resumes rotation. The different speed steps or different drum rotation speeds can correspond to different stages of drying the laundry: start, middle and end of drying, and linen cooling. At each stop, the drum can change direction rotation, so as not to tangle the laundry, to promote uniformity drying and limit wrinkling of this laundry.

Claims (8)

  1. Method for the improved drying of laundry in a washing/drying or drying machine (1), characterized in that, during the laundry drying phase, which may comprise a plurality of steps, the drum (2) is rotated at a so-called "improved-drying" speed below the spinning speed of its contents, this improved-drying speed being between approximately 65 and 70 rpm.
  2. Method according to Claim 1, characterized in that, during the drying phase, the rotation speed of the drum (2) is varied around the improved-drying speed.
  3. Method according to Claim 2, characterized in that the drying phase comprises a plurality of steps, during each of which the rotation speed of the drum is different from one step to the next.
  4. Method according to Claim 3, characterized in that steps at a speed above, at a speed equal to and at a speed below the improved-drying speed are alternated.
  5. Method according to Claim 4, characterized in that, in the same drying step, the speed of the drum may vary from a minimum speed of approximately 35 to 50 rpm to a maximum speed of approximately 70 to 100 rpm.
  6. Method according to one of the preceding claims, characterized in that intermissions are provided during the laundry drying phase.
  7. Method according to Claim 6, characterized in that, whenever the drum stops, its direction of rotation is changed.
  8. Laundry washer/drier or laundry drier, characterized in that it carries out the method according to one of Claims 1 to 7.
EP96401864A 1995-09-01 1996-08-30 Method and machine for drying the laundry Expired - Lifetime EP0761864B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9510300 1995-09-01
FR9510300A FR2738262B1 (en) 1995-09-01 1995-09-01 IMPROVED DRYING PROCESS FOR LAUNDRY AND MACHINE USING THE SAME

Publications (2)

Publication Number Publication Date
EP0761864A1 EP0761864A1 (en) 1997-03-12
EP0761864B1 true EP0761864B1 (en) 2001-08-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401864A Expired - Lifetime EP0761864B1 (en) 1995-09-01 1996-08-30 Method and machine for drying the laundry

Country Status (3)

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EP (1) EP0761864B1 (en)
DE (1) DE69614328D1 (en)
FR (1) FR2738262B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101053580B1 (en) * 2004-02-17 2011-08-03 엘지전자 주식회사 Drying operation control method of drum washing machine
KR101053581B1 (en) * 2004-02-17 2011-08-03 엘지전자 주식회사 Dry air supply structure for drum washing machine and its operation control method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2200301T3 (en) * 1998-02-24 2004-03-01 Antonio Merloni S.P.A. PROCEDURE FOR DRYING OF COLADA, OR SIMILAR, IN WASHERS-DRYERS, OR SIMILAR.
KR100803119B1 (en) * 2003-08-26 2008-02-14 엘지전자 주식회사 Drying stroke control method of combined-use drum washing machine
EP1577433B2 (en) 2004-02-17 2015-11-25 LG Electronics, Inc. Operation control method for a drum type washing machine
FR2907806B1 (en) * 2006-10-25 2008-12-05 Brandt Ind Sas METHOD FOR DRYING THE LAUNDRY OF A DRYING MACHINE
KR20100095107A (en) * 2009-02-20 2010-08-30 엘지전자 주식회사 Washing device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017109A1 (en) * 1980-05-03 1981-11-05 Miele & Cie GmbH & Co, 4830 Gütersloh Tumble-dry procedure for combined washing and drying machine - interrupts slow drum rotation with short-period fast rotation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101053580B1 (en) * 2004-02-17 2011-08-03 엘지전자 주식회사 Drying operation control method of drum washing machine
KR101053581B1 (en) * 2004-02-17 2011-08-03 엘지전자 주식회사 Dry air supply structure for drum washing machine and its operation control method

Also Published As

Publication number Publication date
EP0761864A1 (en) 1997-03-12
DE69614328D1 (en) 2001-09-13
FR2738262B1 (en) 1997-09-26
FR2738262A1 (en) 1997-03-07

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