EP0574296B1 - Dryer with a mechanical device for controlling the heating - Google Patents

Dryer with a mechanical device for controlling the heating Download PDF

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Publication number
EP0574296B1
EP0574296B1 EP93401448A EP93401448A EP0574296B1 EP 0574296 B1 EP0574296 B1 EP 0574296B1 EP 93401448 A EP93401448 A EP 93401448A EP 93401448 A EP93401448 A EP 93401448A EP 0574296 B1 EP0574296 B1 EP 0574296B1
Authority
EP
European Patent Office
Prior art keywords
fan
heating
drum
laundry
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93401448A
Other languages
German (de)
French (fr)
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EP0574296A1 (en
Inventor
Patrick D'ambrosio
Marc-Antoine Rabin
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.)
Compagnie Industrielle dAppareils Menagers SA CIAPEM
Original Assignee
Compagnie Industrielle dAppareils Menagers SA CIAPEM
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Publication of EP0574296A1 publication Critical patent/EP0574296A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry 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
    • 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
    • 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
    • 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
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers

Definitions

  • the present invention relates to a device for managing the heating in a dryer.
  • a dryer comprises a drum in which the laundry is placed, a heating element intended to raise the temperature of the air surrounding the laundry and a paddle turbine intended to ventilate the heated air towards the laundry.
  • An English patent application GB 2,051,330 discloses a dryer comprising a heating control system.
  • the drum In order to brew the laundry, the drum is rotated. In order to prevent the laundry from becoming knotted, the direction of rotation of the drum is regularly reversed during the heating cycle.
  • a single motor drives both the drum and the turbine.
  • the blades of the turbine are chosen curved in order to improve the air flow, which has the advantage of reducing the drying time.
  • the heating must be switched off during the rotation of the drum in the opposite direction.
  • the heating is switched off either using the contacts of a programmer, or using the contacts of a relay controlled by a control card. In the devices according to the prior art it is therefore necessary to provide specific electrical circuits making it possible to cut off the supply to the heating element during the heating cycle.
  • the invention does not have this drawback.
  • the subject of the present invention is a dryer as described by claim 1.
  • An advantage of the invention is therefore to simplify the electrical circuits making it possible to manage the heating in a dryer.
  • FIG. 1 shows the block diagram of a dryer according to the prior art.
  • a motor 1 drives, by means of a belt 2, a drum 3.
  • the tension of the belt is adjusted both by means of the roller 4, integral with the motor 1, and by means of the spring 5, which is also secured to the motor 1 via the lug 6.
  • the heating switch 8 closes under the action of the command C1. Management of the heating element supply is then carried out using the C2 command which acts on the reversing switch 9.
  • the reversing switch 9 When the drum is rotated in the forward direction, the reversing switch 9 is closed and the heating element 7 is supplied. When the drum is rotated in the opposite direction, the reversing switch 9 is open and the heating element 7 is no longer supplied.
  • the commands C1 and C2 come from a timer device not shown in the figure.
  • Figure 2A shows the block diagram of a dryer according to the preferred embodiment of the invention, when the rotation of the drum is carried out in the direct direction.
  • the motor 1 is slidably mounted on its fixing rings 10.
  • the stator of the motor turns on itself in the opposite direction of rotation of the rotor (arrow A in the figure) until that a first lug 11, integral with the stator, comes into abutment in the lumen 15 of the mechanical part 16.
  • a second lug 12, also integral with the stator, is then supported on a third lug 13 belonging to the micro-contact 14 so as to close said micro-contact.
  • the switch 8 being closed, heating is authorized.
  • FIG. 2B represents the block diagram of a dryer according to the preferred embodiment of the invention, when the rotation of the drum takes place in the opposite direction.
  • the stator of the motor 1, slidably mounted on its fixing rings 10, turns on itself in the opposite direction to the direction of rotation of the rotor at the time of the inversion.
  • the first lug 11 is then positioned in abutment in the lumen 15 of the mechanical part 16, but this time at the other end of said lumen.
  • the second lug 12 is then released from the position which allowed it to put pressure on the third lug 13.
  • the microswitch 14 opens and heating is no longer authorized.
  • the dimensions of the light 15 are adjusted so as to ensure the proper functioning of the micro-contact 14.
  • the belt is of the "elastic" type and does not therefore require a tensioning system. It is the belt which, according to this embodiment, positions the lug 11 in abutment in the heir so that the principle of managing the heating can be achieved as described in FIGS. 2A and 2B.
  • the belt can also be tensioned using specific belt tensioning systems. These systems are known to those skilled in the art and it is therefore unnecessary to recall them here.
  • An advantage of the invention lies in that the microswitch 14 detects the direction of rotation of the turbine directly via the motor.
  • Figure 3 shows the block diagram of a dryer according to the invention in the case where the drum drive belt is broken.
  • a thermostat keeps the temperature of the drum constant when it reaches a given value.
  • the motor 1 abuts in the lumen 17 of the mechanical part 16 when the belt is broken.
  • the second lug 12 can no longer make contact with the third lug 13 and the heating is no longer authorized. It is under the action of its own weight that the motor 1 is placed in this position.
  • a spring 18 can possibly contribute to positioning the motor as described above. This spring is shown in Figure 3 but its presence is not essential.
  • the lumen 17 of the mechanical part 16 must have a clearance allowing the motor to sag under the action of its own weight with or without the contribution of the spring 18.
  • Another advantage of the invention is therefore that there is no longer any need for a thermostat in order to prevent the drum from overheating when the belt breaks.
  • the spring 18 can also be used so that the microswitch 14 no longer authorizes heating when the engine is stopped, for example following a breakdown of the electrical circuit controlling the engine.
  • the spring 18 in fact makes it possible to pull the stator slidably mounted, so that the two pins 12 and 13 are no longer in contact.
  • the same motor drives the drum and the turbine. It is obvious that the invention can also be applied to tumble dryers whose motor which drives the drum is different from the motor which drives the turbine.
  • the turbine blades are curved in order to improve the air flow in the direct direction of rotation. It is obvious that the invention can also be applied to turbines with flat blades.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention relates to a laundry dryer comprising a drum (3), in which the laundry is placed, the said drum being driven in rotation by means of a drive motor, a heating element (7) intended for raising the temperature of the air surrounding the laundry, a blade turbine intended for ventilating the heated air in the direction of the laundry, the said turbine being driven by a drive motor, and means for controlling the heating, which are intended, on the one hand, for allowing heating when the turbine rotates in a first direction (A) and, on the other hand, for interrupting the said heating when the turbine rotates in a second direction (B), characterised in that the means for controlling the heating consist of mechanical means and of a microcontact (14) placed in series with the heating element (7), the said mechanical means making it possible to control the opening and closing of the said microcontact. <IMAGE>

Description

La présente invention concerne un dispositif permettant de gérer le chauffage dans un sèche-linge.The present invention relates to a device for managing the heating in a dryer.

De façon générale, un sèche-linge comprend un tambour dans lequel est placé le linge, un élément chauffant destiné à élever la température de l'air environnant le linge et une turbine à pales destinée à ventiler l'air chauffé en direction du linge.In general, a dryer comprises a drum in which the laundry is placed, a heating element intended to raise the temperature of the air surrounding the laundry and a paddle turbine intended to ventilate the heated air towards the laundry.

Une demande de brevet anglais GB 2 051 330 présente un sèche-linge comportant un système de contrôle du chauffage.An English patent application GB 2,051,330 discloses a dryer comprising a heating control system.

Afin de brasser le linge, le tambour est animé d'un mouvement de rotation. De façon à éviter que le linge ne se noue, le sens de rotation du tambour est régulièrement inversé durant le cycle de chauffage.In order to brew the laundry, the drum is rotated. In order to prevent the laundry from becoming knotted, the direction of rotation of the drum is regularly reversed during the heating cycle.

Selon un mode de réalisation très répandu, un seul moteur entraîne à la fois le tambour et la turbine. D'autre part, les pales de la turbine sont choisies courbes afin d'améliorer le débit d'air, ce qui a pour conséquence avantage de réduire le temps de séchage.According to a very common embodiment, a single motor drives both the drum and the turbine. On the other hand, the blades of the turbine are chosen curved in order to improve the air flow, which has the advantage of reducing the drying time.

Cependant, du fait que les pales présentent une courbure, le débit d'air ne se trouve amélioré que dans un seul sens de rotation de la turbine. Dans la suite de la demande ce sens de rotation sera nommé "sens direct".However, because the blades have a curvature, the air flow is only improved in one direction of rotation of the turbine. In the rest of the request, this direction of rotation will be called "direct direction".

Lorsque la rotation de la turbine est en sens inverse du sens direct, le débit d'air est fortement réduit. L'air n'est pas assez brassé. La température atteinte dans le tambour et dans l'environnement de l'élément chauffant peut alors dépasser la température maximale que peut supporter le linge et les pièces constituant cet environnement. Dans la suite de la demande ce sens de rotation sera nommé "sens inverse".When the turbine rotation is in the opposite direction to the direct direction, the air flow is greatly reduced. The air is not sufficiently stirred. The temperature reached in the drum and in the environment of the heating element can then exceed the maximum temperature that the linen and the parts constituting this environment can withstand. In the rest of the request, this direction of rotation will be called "reverse direction".

Même une réduction de la durée de brassage en sens inverse n'est pas suffisante pour diminuer l'échauffement excessif du linge. Ainsi, le chauffage doit-il être coupé pendant la rotation du tambour en sens inverse. La coupure du chauffage est mise en oeuvre soit à l'aide de contacts d'un programmateur, soit à l'aide de contacts d'un relais contrôlés par une carte de commande. Dans les dispositifs selon l'art antérieur il est donc nécessaire de prévoir des circuits électriques spécifiques permettant de couper l'alimentation de l'élément chauffant pendant le cycle de chauffage.Even a reduction in the brewing time in the opposite direction is not sufficient to reduce the excessive heating of the laundry. Thus, the heating must be switched off during the rotation of the drum in the opposite direction. The heating is switched off either using the contacts of a programmer, or using the contacts of a relay controlled by a control card. In the devices according to the prior art it is therefore necessary to provide specific electrical circuits making it possible to cut off the supply to the heating element during the heating cycle.

L'invention ne présente pas cet inconvénient.The invention does not have this drawback.

La présente invention a pour objet un sèche-linge tel que décrit par la revendication 1.The subject of the present invention is a dryer as described by claim 1.

Un avantage de l'invention est donc de simplifier les circuits électriques permettant de gérer le chauffage dans un sèche-linge.An advantage of the invention is therefore to simplify the electrical circuits making it possible to manage the heating in a dryer.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture d'un mode de réalisation préférentiel fait avec référence aux figures ci-annexées dans lesquelles :

  • la figure 1 représente le schéma de principe d'un sèche-linge selon l'art antérieur ;
  • la figure 2A représente le schéma de principe d'un sèche-linge selon l'invention lorsque la rotation du tambour s'effectue dans le sens direct
  • la figure 2B représente le schéma de principe d'un sèche-linge selon l'invention lorsque la rotation du tambour s'effectue dans le sens inverse du sens direct ;
  • la figure 3 représente le schéma de principe d'un sèche-linge selon l'invention dans le cas où la courroie d'entraînement du tambour est rompue.
Other characteristics and advantages of the invention will appear on reading a preferred embodiment made with reference to the appended figures in which:
  • Figure 1 shows the block diagram of a dryer according to the prior art;
  • Figure 2A shows the block diagram of a dryer according to the invention when the drum is rotated in the direct direction
  • FIG. 2B represents the block diagram of a dryer according to the invention when the rotation of the drum takes place in the opposite direction to the direct direction;
  • Figure 3 shows the block diagram of a dryer according to the invention in the case where the drum drive belt is broken.

Sur toutes les figures, les mêmes repères désignent les mêmes éléments.In all the figures, the same references designate the same elements.

La figure 1 représente le schéma de principe d'un sèche-linge selon l'art antérieur. Un moteur 1 entraîne, par l'intermédiaire d'une- courroie 2, un tambour 3. La tension de la courroie est ajustée à la fois à l'aide du galet 4, solidaire du moteur 1, et à l'aide du ressort 5, lui aussi solidaire du moteur 1 par l'intermédiaire de l'ergot 6. Lorsque le cycle de chauffage est programmé, l'interrupteur de chauffage 8 se ferme sous l'action de la commande C1. La gestion de l'alimentation de l'élément chauffant est alors effectuée à l'aide de la commande C2 qui agit sur l'interrupteur d'inversion 9.Figure 1 shows the block diagram of a dryer according to the prior art. A motor 1 drives, by means of a belt 2, a drum 3. The tension of the belt is adjusted both by means of the roller 4, integral with the motor 1, and by means of the spring 5, which is also secured to the motor 1 via the lug 6. When the heating cycle is programmed, the heating switch 8 closes under the action of the command C1. Management of the heating element supply is then carried out using the C2 command which acts on the reversing switch 9.

Lors de la rotation du tambour dans le sens direct, l'interrupteur d'inversion 9 est fermé et l'élément de chauffage 7 est alimenté. Lors de la rotation du tambour dans le sens inverse, l'interrupteur d'inversion 9 est ouvert et l'élément de chauffage 7 n'est plus alimenté. Les commandes C1 et C2 sont issues d'un dispositif de minuterie non représenté sur la figure.When the drum is rotated in the forward direction, the reversing switch 9 is closed and the heating element 7 is supplied. When the drum is rotated in the opposite direction, the reversing switch 9 is open and the heating element 7 is no longer supplied. The commands C1 and C2 come from a timer device not shown in the figure.

La figure 2A représente le schéma de principe d'un sèche-linge selon le mode de réalisation préférentiel de l'invention, lorsque la rotation du tambour s'effectue dans le sens direct.Figure 2A shows the block diagram of a dryer according to the preferred embodiment of the invention, when the rotation of the drum is carried out in the direct direction.

Le moteur 1 est monté coulissant sur ses bagues de fixation 10. Lorsque le moteur entraîne le tambour dans le sens direct le stator du moteur tourne sur lui-même dans le sens inverse de rotation du rotor (flèche A sur la figure) jusqu'à ce qu'un premier ergot 11, solidaire du stator, vienne en butée dans la lumière 15 de la pièce mécanique 16. Un deuxième ergot 12, lui aussi solidaire du stator, est alors en appui sur un troisième ergot 13 appartenant au micro-contact 14 de façon à fermer ledit micro-contact. L'interrupteur 8 étant fermé, le chauffage est autorisé.The motor 1 is slidably mounted on its fixing rings 10. When the motor drives the drum in the direct direction, the stator of the motor turns on itself in the opposite direction of rotation of the rotor (arrow A in the figure) until that a first lug 11, integral with the stator, comes into abutment in the lumen 15 of the mechanical part 16. A second lug 12, also integral with the stator, is then supported on a third lug 13 belonging to the micro-contact 14 so as to close said micro-contact. The switch 8 being closed, heating is authorized.

La figure 2B représente le schéma de principe d'un sèche-linge selon le mode de réalisation préférentiel de l'invention, lorsque la rotation du tambour s'effectue dans le sens inverse.FIG. 2B represents the block diagram of a dryer according to the preferred embodiment of the invention, when the rotation of the drum takes place in the opposite direction.

Le stator du moteur 1, monté coulissant sur ses bagues de fixation 10, tourne sur lui-même dans le sens inverse du sens de rotation du rotor au moment de l'inversion. Le premier ergot 11 vient alors se positionner en butée dans la lumière 15 de la pièce mécanique 16, mais cette fois à l'autre extrémité de ladite lumière. Le deuxième ergot 12 est alors dégagé de la position qui lui permettait de faire pression sur le troisième ergot 13. Le micro-contact 14 s'ouvre et le chauffage n'est plus autorisé. Les dimensions de la lumière 15 sont ajustées de façon à assurer le bon fonctionnement du micro-contact 14.The stator of the motor 1, slidably mounted on its fixing rings 10, turns on itself in the opposite direction to the direction of rotation of the rotor at the time of the inversion. The first lug 11 is then positioned in abutment in the lumen 15 of the mechanical part 16, but this time at the other end of said lumen. The second lug 12 is then released from the position which allowed it to put pressure on the third lug 13. The microswitch 14 opens and heating is no longer authorized. The dimensions of the light 15 are adjusted so as to ensure the proper functioning of the micro-contact 14.

Selon le mode de réalisation préférentiel de l'invention, la courroie est du type "élastique" et ne nécessite pas, en, conséquence, de système de tension. C'est la courroie qui, selon ce mode de réalisation, positionne l'ergot 11 en butée dans la himière de façon que le principe de gestion du chauffage puisse être réalisé tel que décrit en figures 2A et 2B.According to the preferred embodiment of the invention, the belt is of the "elastic" type and does not therefore require a tensioning system. It is the belt which, according to this embodiment, positions the lug 11 in abutment in the heir so that the principle of managing the heating can be achieved as described in FIGS. 2A and 2B.

Selon d'autres modes de réalisation, la courroie peut aussi être tendue à l'aide de systèmes spécifiques de tension de courroie. Ces systèmes sont connus de l'homme de l'art et il n'est donc pas nécessaire de les rappeler ici.According to other embodiments, the belt can also be tensioned using specific belt tensioning systems. These systems are known to those skilled in the art and it is therefore unnecessary to recall them here.

Un avantage de l'invention réside en ce que le micro-contact 14 détecte le sens de rotatlon de la turbine directement via le moteur.An advantage of the invention lies in that the microswitch 14 detects the direction of rotation of the turbine directly via the motor.

Il n'est donc pas nécessaire d'utiliser d'interrupteurs d'inversion du type de celui de l'art antérieur et le dispositif de minuterie se trouve simplifié puisque les circuits spécifiques permettant de générer la commande C2 ne sont plus nécessaires.It is therefore not necessary to use reversing switches of the type of that of the prior art and the timer device is simplified since the specific circuits making it possible to generate the command C2 are no longer necessary.

La figure 3 représente le schéma de principe d'un sèche-linge selon l'invention dans le cas où la courroie d'entraînement du tambour est rompue.Figure 3 shows the block diagram of a dryer according to the invention in the case where the drum drive belt is broken.

Parmi les pannes auxquelles les sèches-linges donnent lieu, l'une est la rupture de la courroie.Among the breakdowns to which the tumble dryers give rise, one is the rupture of the belt.

Lorsque la courroie se rompt le tambour n'est plus entraîné. Il est alors nécessaire de détecter l'élévation de température des flasques du tambour. Selon l'art antérieur, un thermostat permet de maintenir la température du tambour constante lorsque celle-ci atteint une valeur donnée.When the belt breaks the drum is no longer driven. It is then necessary to detect the rise in temperature of the flanges of the drum. According to the prior art, a thermostat keeps the temperature of the drum constant when it reaches a given value.

Selon l'invention, le moteur 1 vient en butée dans la lumière 17 de la pièce mécanique 16 quand la courroie est cassée. Ainsi, quel que soit le sens de rotation initial du moteur, le deuxième ergot 12 ne peut plus faire contact avec le troisième ergot 13 et le chauffage n'est plus autorisé. C'est sous l'action de son propre poids que le moteur 1 se place dans cette position. Un ressort 18 peut éventuellement contribuer à positionner le moteur comme décrit ci-dessus. Ce ressort est représenté sur la figure 3 mais sa présence n'est pas indispensable.According to the invention, the motor 1 abuts in the lumen 17 of the mechanical part 16 when the belt is broken. Thus, whatever the initial direction of rotation of the motor, the second lug 12 can no longer make contact with the third lug 13 and the heating is no longer authorized. It is under the action of its own weight that the motor 1 is placed in this position. A spring 18 can possibly contribute to positioning the motor as described above. This spring is shown in Figure 3 but its presence is not essential.

Selon l'invention, la lumière 17 de la pièce mécanique 16 doit présenter un dégagement permettant au moteur de s'affaisser sous l'action de son propre poids avec ou sans la contribution du ressort 18.According to the invention, the lumen 17 of the mechanical part 16 must have a clearance allowing the motor to sag under the action of its own weight with or without the contribution of the spring 18.

Un autre avantage de l'invention est donc de ne plus nécessiter de thermostat afin d'éviter l'échauffement du tambour lors de la cassure de la courroie.Another advantage of the invention is therefore that there is no longer any need for a thermostat in order to prevent the drum from overheating when the belt breaks.

De façon plus générale, le ressort 18 peut aussi être utilisé de façon que le micro-contact 14 n'autorise plus le chauffage lorsque le moteur est à l'arrêt, par exemple suite à une panne du circuit électrique de commande du moteur. Le ressort 18 permet en effet de tirer le stator monté coulissant, de façon que les deux ergots 12 et 13 ne soient plus en contact.More generally, the spring 18 can also be used so that the microswitch 14 no longer authorizes heating when the engine is stopped, for example following a breakdown of the electrical circuit controlling the engine. The spring 18 in fact makes it possible to pull the stator slidably mounted, so that the two pins 12 and 13 are no longer in contact.

Selon le mode de réalisation préférentiel décrit précédemment, le même moteur entraîne le tambour et la turbine. Il est évident que l'invention peut aussi s'appliquer à des sèches-linges dont le moteur qui entraîne le tambour est différent du moteur qui entraîne la turbine.According to the preferred embodiment described above, the same motor drives the drum and the turbine. It is obvious that the invention can also be applied to tumble dryers whose motor which drives the drum is different from the motor which drives the turbine.

De même, selon ce même mode de réalisation préférentiel, les pales de la turbine sont courbes afin d'améliorer le débit d'air dans le sens de rotation direct. Il est évident que l'invention peut aussi s'appliquer à des turbines à pales plates.Similarly, according to this same preferred embodiment, the turbine blades are curved in order to improve the air flow in the direct direction of rotation. It is obvious that the invention can also be applied to turbines with flat blades.

Claims (7)

  1. Laundry dryer comprising a drum (3) in which the laundry is placed, the said drum being driven in rotation with the aid of a drive motor, a heating element (7) intended to raise the temperature of the air around the laundry, a fan with blades which is intended to blow the heated air towards the laundry, the said fan being driven by a drive motor, and heating-control means intended, on the one hand, to allow heating when the fan is turning in a first direction (A) and, on the other hand, to interrupt the said heating when the fan is turning in a second direction (B), characterized in that the heating-control means consist of mechanical means (11, 12, 16) and a micro-contact (14) placed in series with the heating element (7), the said mechanical means making it possible to open and to close the said micro-contact, the mechanical means (11, 12, 16) including a mechanical component (16) in which a slot (15) is made, a first stub (11) and a second stub (12), both integral with the stator of the motor driving the fan, the said first stub (11) being positioned at one of the two ends of the slot (15) when the fan is turning in the first direction (A) and at the other end of the slot when the fan is turning in the second direction, and the said second stub (12) coming to bear on a third stub (13) belonging to the micro-contact (14) so as to close the latter when the fan is turning in the first direction (A), and no longer being in contact with the said third stub (13) so as to open the micro-contact when the fan is turning in the second direction (B).
  2. Laundry dryer according to Claim 1, characterized in that the motor (1) for driving the drum is the one which drives the fan.
  3. Laundry dryer according to either one of the preceding claims, characterized in that it contains an elastic belt (2) allowing the drum (3) to be driven.
  4. Laundry dryer according to either one of Claims 1 and 2, characterized in that it contains a belt (2) allowing the drum (3) to be driven, and a system for tensioning the said belt.
  5. Laundry dryer according to either one of Claims 3 and 4, characterized in that the mechanical component (16) comprises a second slot (17) allowing the rings (10) for attaching the motor to come into abutment on one end of the said second slot when the motor (1) drops down under the action of its own weight following snapping of the belt (2), so as to open the micro-contact (14).
  6. Laundry dryer according to any one of the preceding claims, characterized in that the blades of the fan are curved.
  7. Laundry dryer according to any one of Claims 1 to 6, characterized in that the blades of the fan are flat.
EP93401448A 1992-06-12 1993-06-08 Dryer with a mechanical device for controlling the heating Expired - Lifetime EP0574296B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9207106 1992-06-12
FR929207106A FR2692289B1 (en) 1992-06-12 1992-06-12 DRYER COMPRISING A MECHANICAL HEATING MANAGEMENT DEVICE.

Publications (2)

Publication Number Publication Date
EP0574296A1 EP0574296A1 (en) 1993-12-15
EP0574296B1 true EP0574296B1 (en) 1997-03-05

Family

ID=9430670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401448A Expired - Lifetime EP0574296B1 (en) 1992-06-12 1993-06-08 Dryer with a mechanical device for controlling the heating

Country Status (5)

Country Link
EP (1) EP0574296B1 (en)
AT (1) ATE149590T1 (en)
DE (1) DE69308389T2 (en)
ES (1) ES2100484T3 (en)
FR (1) FR2692289B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007046068B4 (en) 2006-10-02 2018-06-28 Lg Electronics Inc. Device for detecting a belt separation in a dryer and method for detecting this process
CN111218794B (en) * 2018-11-26 2022-08-02 无锡飞翎电子有限公司 Electric appliance and load weighing method and device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1585962A1 (en) * 1963-09-02 1969-09-25 Siemens Elektrogeraete Gmbh A laundry treatment machine, especially a laundry dryer, that works according to the drum principle
US3623378A (en) * 1970-04-06 1971-11-30 Fedders Corp Clutching apparatus
GB2051330A (en) * 1979-06-15 1981-01-14 Philips Electronic Associated Clothes dryer

Also Published As

Publication number Publication date
EP0574296A1 (en) 1993-12-15
ATE149590T1 (en) 1997-03-15
DE69308389D1 (en) 1997-04-10
DE69308389T2 (en) 1997-06-19
ES2100484T3 (en) 1997-06-16
FR2692289B1 (en) 1994-07-29
FR2692289A1 (en) 1993-12-17

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