EP0110448B1 - Washing machine for laundry or the like with a safety or alarm device in case the drain hose drops on the floor - Google Patents

Washing machine for laundry or the like with a safety or alarm device in case the drain hose drops on the floor Download PDF

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Publication number
EP0110448B1
EP0110448B1 EP83201529A EP83201529A EP0110448B1 EP 0110448 B1 EP0110448 B1 EP 0110448B1 EP 83201529 A EP83201529 A EP 83201529A EP 83201529 A EP83201529 A EP 83201529A EP 0110448 B1 EP0110448 B1 EP 0110448B1
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EP
European Patent Office
Prior art keywords
pump
pressure
discharge
tube
washing machine
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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
Application number
EP83201529A
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German (de)
French (fr)
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EP0110448A1 (en
Inventor
Michel Steers
Jean-Pierre Hazan
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Whirlpool International BV
Original Assignee
Laboratoires dElectronique et de Physique Appliquee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/10—Power supply arrangements, e.g. stand-by circuits

Definitions

  • the present invention relates to a washing machine or the like the evacuation of water of which is effected by means of a drain pipe and which is provided with a safety and alarm device against flooding in case of said rod falling on the ground.
  • a washing machine is described, the drainage circuit of which comprises, between its end opening into the waste water pipe and the bottom of the washing tank and downstream of the drain pump, an inverted U-shaped tube, the top of which is at a level at least equal to that of the maximum level provided in the tank, the ascending branch being connected to the drain pump and the descending branch connected to the wastewater pipe.
  • the top of the top is vented using a tube connected to the U-shaped tube and opens into the top of the washing tub above the maximum level reached by the water.
  • the device is designed so as to avoid any siphoning both of the water from the tank to the waste water pipe and from the latter to the washing tank.
  • the invention relates precisely to washing machines for which the evacuation of water is effected by means of a hose which is not fixed in a sealed manner to the sewage pipe and more particularly those of which the outlet evacuation hose is mobile and is called "drain rod" because of its butt end.
  • This drain rod is generally made of flexible material to be adapted on the rim of a sink, a washbasin or a bathtub, its height being able to be included in a fairly wide range, for example 0.6 to 1 m above the base of the machine.
  • the object of the invention is to guard against the drawbacks due to the mobility of this drain rod and to the fact that this rod can fall to the ground and that it may result in flooding.
  • the object of the invention is to guard against this danger of flooding when the pump is stopped (for example washing phase) but also when this pump is running (for example draining phase).
  • the invention provides a washing machine with washing tub provided at its lower part with an orifice followed by a drain pump with connected outlet, as according to US-AN patent 3346000, to the ascending branch of an inverted U-shaped pipe whose top, located at a height at least equal to that of the maximum water level in the tank, is vented and whose descending branch brings the drained water towards the sewer line, remarkable in that the downward branch of the inverted U is connected to said line by means of a removable drain pipe, a pressure detector being connected at the connection point of said descending branch and of the drain rod, and in that it comprises alarm and stop or start control means of the drain pump supplied electrically by a circuit including associated control means pressure sensor.
  • the invention is based on the fact that the value of the pressure in the waste water evacuation pipe at the connection of the descending branch of the U and the drain pipe is a function of the position of the drain pipe, either in the air, either on the ground, and also a function of the on or off state of the drain pump and that the values of this pressure can be classified in relation to each other according to the circumstances: if P o and P 1 are the values of this pressure, pump stopped, drain stick respectively on the ground and in the air, and P z , P 3 the values of this pressure, pump running, drain stick respectively on land and in the air, all of these values are such that:
  • control means associated with the pressure detector and inserted into the electrical supply circuits of the drain pump and alarm means have several independent degrees of sensitivity and in conjunction with the different pressure values indicated above.
  • the washing machine is not shown completely.
  • the washing tub 11 provided at its base with a drain orifice 12 to which is connected the pipe 13 which opens into the drain pump 14.
  • the water evacuation pipe comprises the inverted U-shaped tube 15, the top of which is 10 and the ascending and descending branches respectively 16 and 17.
  • the descending branch is connected to the drain rod 18 comprising, in the normal operating position, an ascending part 19 and a butt 20, which butt is for example suitable for the descent of wastewater 22.
  • the U-shaped tube is connected in the vicinity of the top 10 in the open air or more precisely in the washing tank above the maximum water level in this tank using the hose 23.
  • the washing machine includes a pressure sensor in the drain pipe at the level of the junction of the downward part of the inverted U and the drain rod.
  • This detector comprises for example a tube (24) initially filled with air connected to the pipeline at point A substantially at the location of said junction.
  • the tube ends in a cylindrical manometric chamber with two bodies respectively 25 and 27 separated by the movable membrane 26.
  • the displacement of 26 in the chamber which takes place perpendicular to itself depends on the level of water reached in the tube 24, which is linked to the pressure in the flow pipe at point A, which itself depends on the position of the drain rod, adapted to 22 or on the ground, and also of the stop or running state of the drain pump, this level being higher the higher the pressure in A in the pipeline.
  • the water levels in the tube 24 and the water pressure at point A are respectively h o h, h 2 h 3 and P o P, P 2 P 3 satisfying the inequalities :
  • Fig. 2 shows by way of example according to an embodiment of the invention, how the latter takes advantage of this pressure gradation to design and organize means which, in the event of the drain rod falling to the ground, emit a alarm and practically simultaneously cause the drain pump to stop if it is running, these means being controlled using means associated with the pressure detector at point A in FIG. 1.
  • the control is effected by the displacement of this membrane 26.
  • the membrane 26 is provided on the side of the body 27 of the part 31. This part is fixed in a non-deformable manner to 26.
  • lever arms 34 and 35 which are connected elastically to the wall 36 by means of springs respectively 37 and 38 acting in compression and are movable around the axes respectively 39 and 40 perpendicular to the plane of the sheet.
  • These lever arms are electrically conductive on their part extending from their respective axis to points K and L respectively. The stroke of the rotational movement of these partly conductive lever arms extends for each of them, during of the movement of the membrane 26, between the pairs of studs 41,42 and 43, 44 respectively.
  • the studs 42 and 44 are each connected to the ground potential respectively through the drain pump 45 and an apparatus 46 emitting an alarm ( sound or light), while the studs 41 and 43 are isolated or grounded.
  • the axes 39 and 40 are both brought to the potential of the HV supply voltage of said pump and alarm.
  • the height positions of the studs 41 and 42 in the chamber body 27 are determined so that when the pressure in the evacuation pipe at point A corresponding to P 2 and P 3 and therefore for the corresponding positions of the membrane 26, the lever 34 is in contact for its conductive part with the pads 41 and 42 respectively, which corresponds respectively to the stop or the running of the drain pump for a position of the drain rod which, let us recall, is respectively on the ground or in the air.
  • the positions of the pads 44 and 43 are determined in relation to those of the pad 41 so that when the pressure in the pipeline corresponds respectively to the pump stopped, the rod on land (P o ) or in the air (P i ), and for positions corresponding to the diaphragm 26, the lever arm 35 is in contact respectively with 44 or 43, the contact between 41 and 34 being ensured, which causes the activation or not of the alarm 46, depending on whether the pressure is P o or P ,.
  • the invention provides for priming the drain rod.
  • the pump is supplied by a circuit comprising the contactor 47 with two positions 48 and 49 respectively, this contactor being in position 48.
  • This contactor is linked to the time relay 50 by means of the link 51, said relay in series with the resistor 53 and the diode 54 being placed in parallel on the supply of the pump.
  • This relay whose action constant is of the order of a few seconds, depending on the capacity 52 and the resistance 53, switches the contactor from position 48 to 49.
  • the part of the system described first can then operate as already explained, "note” the position of the drain rod on the ground or in the air and possibly take the appropriate preventive measures.
  • the pressure detector at point A may have a deformable membrane, the deformation of said membrane then controlling the electrical circuits supplying the pump and the alarm transmitter.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Description

La présente invention concerne une machine à laver le linge ou autre dont l'évacuation de l'eau s'effectue au moyen d'une canne de vidange et qui est munie d'un dispositif de sécurité et d'alarme contre l'inondation en cas de chute de ladite canne sur le sol.The present invention relates to a washing machine or the like the evacuation of water of which is effected by means of a drain pipe and which is provided with a safety and alarm device against flooding in case of said rod falling on the ground.

Dans le brevet US-A N° 3346000, il est décrit une machine à laver dont le circuit de vidange comporte entre son extrémité débouchant dans la canalisation des eaux usées et le bas de la cuve de lavage et en aval de la pompe de vidange, un tube en U renversé dont le sommet se trouve à un niveau au moins égal à celui du niveau maximum prévu dans la cuve, la branche ascendante étant connectée à la pompe de vidange et la branche descendante reliéeà la canalisation d'eaux usées. De plus, le haut du sommet est mis à l'air libre à l'aide d'un tube connecté au tube en U et débouchant dans le haut de la cuve de lavage au-dessus du niveau maximum atteint par l'eau.In patent US-A No. 3346000, a washing machine is described, the drainage circuit of which comprises, between its end opening into the waste water pipe and the bottom of the washing tank and downstream of the drain pump, an inverted U-shaped tube, the top of which is at a level at least equal to that of the maximum level provided in the tank, the ascending branch being connected to the drain pump and the descending branch connected to the wastewater pipe. In addition, the top of the top is vented using a tube connected to the U-shaped tube and opens into the top of the washing tub above the maximum level reached by the water.

Le dispositif est conçu de manière à éviter tout siphonage aussi bien de l'eau de la cuve vers la canalisation d'eaux usées que de cette dernière vers la cuve de lavage.The device is designed so as to avoid any siphoning both of the water from the tank to the waste water pipe and from the latter to the washing tank.

Il faut remarquer de plus qu'un résultat supplémentaire obtenu à l'aide de ce dispositif, au cas où la connexion de la branche descendante de l'U avec la canalisation d'eaux usées viendrait à être défectueuse ou débranchée accidentellement, est que l'existence du U renversé offre l'avantage lorsque la cuve est remplie d'eau et que la pompe est arrêtée (en phase lavage par exemple) que cette eau ne peut s'écouler en dehors de la machine et provoquer des inondations. Par contre, lorsque la pompe est en fonctionnement, cet U n'est d'aucun secours.It should also be noted that an additional result obtained with the aid of this device, in the event that the connection of the descending branch of the U with the waste water pipe becomes defective or accidentally disconnected, is that the he existence of the inverted U offers the advantage when the tank is filled with water and the pump is stopped (in the washing phase for example) that this water cannot flow out of the machine and cause flooding. On the other hand, when the pump is in operation, this U is of no help.

L'invention intéresse justement les machines à laver pour lesquelles l'évacuation des eaux s'effectue au moyen d'un tuyau non fixé d'une façon étanche à la canalisation des eaux usées et plus particulièrement celles dont le tuyau d'évacuation en sortie est mobile et s'àppelle «canne de vidange» du fait de son extrémité en crosse. Cette canne de vidange est généralement réalisée en matériau flexible pour être adaptée sur le rebord d'un évier, d'un lavabo ou d'une baignoire, sa hauteur pouvant être comprise dans une plage assez large, par exemple 0,6 à 1 m au-dessus du socle de la machine.The invention relates precisely to washing machines for which the evacuation of water is effected by means of a hose which is not fixed in a sealed manner to the sewage pipe and more particularly those of which the outlet evacuation hose is mobile and is called "drain rod" because of its butt end. This drain rod is generally made of flexible material to be adapted on the rim of a sink, a washbasin or a bathtub, its height being able to be included in a fairly wide range, for example 0.6 to 1 m above the base of the machine.

Le but de l'invention est de se prémunir des inconvénients dus à la mobilité de cette canne de vidange et au fait que cette canne peut tomber à terre et qu'il peut en résulter des inondations.The object of the invention is to guard against the drawbacks due to the mobility of this drain rod and to the fact that this rod can fall to the ground and that it may result in flooding.

Le but de l'invention est de se prémunir de ce danger d'inondation lorsque la pompe est à l'arrêt (par exemple phase de lavage) mais aussi lorsque cette pompe est en marche (par exemple phase de vidange).The object of the invention is to guard against this danger of flooding when the pump is stopped (for example washing phase) but also when this pump is running (for example draining phase).

Pour parvenir à ces buts, l'invention propose une machine à laver avec cuve de lavage munie à sa partie inférieure d'un orifice suivi d'une pompe de vidange avec sortie connectée, comme selon le brevet US-AN° 3346000, à la branche ascendante d'un tuyau en forme de U renversé dont le sommet, situé à une hauteur au moins égale à celle du niveau d'eau maximum dans la cuve, est mis à l'air libre et dont la branche descendante amène les eaux vidangées en direction de la canalisation d'égout, remarquable en ce que la branche descendante de l'U renversé est connectée à ladite canalisation par l'intermédiaire d'une canne de vidange amovible, un détecteur de pression étant connecté à l'endroit du raccordement de ladite branche descendante et de la canne de vidange, et en ce qu'elle comporte des moyens d'alarme et de commande d'arrêt ou de marche de la pompe de vidange alimentés électriquement par un circuit in- serrant des moyens de commande associés au détecteur de pression.To achieve these goals, the invention provides a washing machine with washing tub provided at its lower part with an orifice followed by a drain pump with connected outlet, as according to US-AN patent 3346000, to the ascending branch of an inverted U-shaped pipe whose top, located at a height at least equal to that of the maximum water level in the tank, is vented and whose descending branch brings the drained water towards the sewer line, remarkable in that the downward branch of the inverted U is connected to said line by means of a removable drain pipe, a pressure detector being connected at the connection point of said descending branch and of the drain rod, and in that it comprises alarm and stop or start control means of the drain pump supplied electrically by a circuit including associated control means pressure sensor.

L'invention sefonde sur le fait que la valeur de la pression dans la canalisation d'évacuation des eaux usées au niveau du raccordement de la branche descendante du U et de la canne de vidange est fonction de la position de la canne de vidange, soit en l'air, soit à terre, et également fonction de l'état en marche ou arrêt de fa pompe de vidange et que l'on peut classer l'une par rapport à l'autre les valeurs de cette pression suivant les circonstances: si Po et P1 sont les valeurs de cette pression, pompe à l'arrêt, crosse de vidange respectivement à terre et en l'air, et Pz, P3 les valeurs de cette pression, pompe en marche, crosse de vidange respectivement à terre et en l'air, l'ensemble de ces valeurs est tel que:The invention is based on the fact that the value of the pressure in the waste water evacuation pipe at the connection of the descending branch of the U and the drain pipe is a function of the position of the drain pipe, either in the air, either on the ground, and also a function of the on or off state of the drain pump and that the values of this pressure can be classified in relation to each other according to the circumstances: if P o and P 1 are the values of this pressure, pump stopped, drain stick respectively on the ground and in the air, and P z , P 3 the values of this pressure, pump running, drain stick respectively on land and in the air, all of these values are such that:

Figure imgb0001
De manière que l'invention puisse intervenir en toute circonstance etau cours des différentes phases de fonctionnement de la machine lorsque la canne de vidange viendrait à tomber, les moyens de commande associés au détecteur de pression et inserrés dans les circuits d'alimentation électrique de la pompe de vidange et des moyens d'alarme, comportent plusieurs degrés de sensibilité indépendants et en liaison avec les différentes valeurs de pression indiquées précédemment.
Figure imgb0001
 So that the invention can intervene in any circumstance and during the various operating phases of the machine when the drain rod falls, the control means associated with the pressure detector and inserted into the electrical supply circuits of the drain pump and alarm means, have several independent degrees of sensitivity and in conjunction with the different pressure values indicated above.

L'invention sera mieux comprise à l'aide de la description suivante accompagnée de dessins qui représentent:

  • Fig. 1: un schéma partiel de la machine à laver avec son système d'évacuation d'eau.
  • Fig. 2: un schéma des moyens d'alarme et commande de pompe de vidange en cas de chute à terre de la canne de vidange.
The invention will be better understood with the aid of the following description accompanied by drawings which represent:
  • Fig. 1: a partial diagram of the washing machine with its water drainage system.
  • Fig. 2: a diagram of the means of alarm and control of the drain pump in the event of a fall to the ground of the drain rod.

Sur la fig. 1, la machine à laver n'est pas représentée complètement. Apparaît la cuve de lavage 11 munie à sa base d'un orifice de vidange 12 auquel est connecté le tuyau 13 qui débouche dans la pompe de vidange 14. Au-delà de la pompe de vidange, la canalisation d'évacuation d'eau comprend le tube en U renversé 15 dont le sommet est 10 et les branches ascendante et descendante respectivement 16 et 17. La branche descendante est connectée à la canne de vidange 18 comportant en position normale de fonctionnement une partie ascendante 19 et une crosse 20, laquelle crosse est par exemple adaptée sur la descente d'eaux usées 22. Le tube en U est relié au voisinage du sommet 10 à l'air libre ou plus précisément à la cuve de lavage au-dessus du niveau d'eau maximal dans cette cuve à l'aide du tuyau 23. La machine à laver comporte un détecteur de la pression dans la canalisation de vidange au niveau de la jonction de la partie descendante de l'U renversé et de la canne de vidange. Ce détecteur comporte par exemple un tube (24) initialement rempli d'air connecté à la canalisation au point A sensiblement à l'endroit de ladite jonction. Le tube se termine par une chambre cylindrique manométrique à deux corps respectivement 25 et 27 séparés par la membrane mobile 26. Le déplacement de 26 dans la chambre qui s'effectue perpendiculaire à lui-même est fonction du niveau d'eau atteint dans le tube 24, lequel est lié à la pression dans la canalisation d'écoulement au point A, elle-même fonction de la position de la canne de vidange, adaptée sur 22 ou à terre, et aussi de l'état d'arrêt ou marche de la pompe de vidange, ce niveau étant d'autant plus grand que la pression en A dans la canalisation est plus forte.In fig. 1, the washing machine is not shown completely. Appears the washing tub 11 provided at its base with a drain orifice 12 to which is connected the pipe 13 which opens into the drain pump 14. Beyond the drain pump, the water evacuation pipe comprises the inverted U-shaped tube 15, the top of which is 10 and the ascending and descending branches respectively 16 and 17. The descending branch is connected to the drain rod 18 comprising, in the normal operating position, an ascending part 19 and a butt 20, which butt is for example suitable for the descent of wastewater 22. The U-shaped tube is connected in the vicinity of the top 10 in the open air or more precisely in the washing tank above the maximum water level in this tank using the hose 23. The washing machine includes a pressure sensor in the drain pipe at the level of the junction of the downward part of the inverted U and the drain rod. This detector comprises for example a tube (24) initially filled with air connected to the pipeline at point A substantially at the location of said junction. The tube ends in a cylindrical manometric chamber with two bodies respectively 25 and 27 separated by the movable membrane 26. The displacement of 26 in the chamber which takes place perpendicular to itself depends on the level of water reached in the tube 24, which is linked to the pressure in the flow pipe at point A, which itself depends on the position of the drain rod, adapted to 22 or on the ground, and also of the stop or running state of the drain pump, this level being higher the higher the pressure in A in the pipeline.

Différents cas sont à considérer:

  • a) la pompe est à l'arrêt, la cuve est soit vide ou remplie d'eau, la canne 18 est en l'air (adaptée sur la descente 22). Le niveau d'eau dans la branche descendante 17 et la canne 18 sont égaux. Le niveau d'eau dans 24 est ht correspondant à la pression P1 au point A;
  • b) la pompe est à l'arrêt, la cuve est vide ou remplie d'eau, la canne venant à tomber à terre. Du fait de la prise d'air 23, aucun siphonage en provenance de la cuve n'est possible, seule s'écoule à terre l'eau contenue dans la branche 17, la canne de vidange et le tube 24, le niveau ho dans celui-ci devenant sensiblement 0 correspondant à la pression Po au point A qui n'est autre que la pression atmosphérique avec les relations:
    Figure imgb0002
  • c) la pompe est en marche, la cuve remplie d'eau, la canne est à terre. Du fait du pompage, la branche 17 n'est pas vide de même que la canne. De l'eau se trouve refoulée dans le tube 24 jusqu'à un niveau h2. La pression P2 au pointAet le niveau h2 se trouvent satisfaire aux inégalités:
    Figure imgb0003
  • d) la pompe est en marche, la cuve remplie d'eau, la canne en l'air. La branche 17 et la canne 18 sont remplies d'eau. Du fait du refoulement de l'eau par la pompe de lavage et d'une certaine hauteur d'eau dans la canne de vidange, la pression P3 au point A et le niveau h3 dans le tube 24 se trouvent satisfaire aux inégalités:
    Figure imgb0004
Different cases are to be considered:
  • a) the pump is stopped, the tank is either empty or filled with water, the rod 18 is in the air (adapted on the descent 22). The water level in the descending branch 17 and the rod 18 are equal. The water level in 24 is h t corresponding to the pressure P 1 at point A;
  • b) the pump is stopped, the tank is empty or filled with water, the cane falling to the ground. Due to the air intake 23, no siphoning from the tank is possible, only the water contained in the branch 17 flows to the ground, the drain rod and the tube 24, the level h o in it becoming substantially 0 corresponding to the pressure P o at point A which is none other than atmospheric pressure with the relationships:
    Figure imgb0002
  • c) the pump is running, the tank filled with water, the cane is on the ground. Due to the pumping, the branch 17 is not empty as is the cane. Water is forced back into the tube 24 to a level h 2 . The pressure P 2 at point A and the level h 2 are found to satisfy the inequalities:
    Figure imgb0003
  • d) the pump is running, the tank filled with water, the cane in the air. The branch 17 and the cane 18 are filled with water. Due to the backflow of water by the washing pump and a certain height of water in the drain pipe, the pressure P 3 at point A and the level h 3 in the tube 24 are found to satisfy the inequalities:
    Figure imgb0004

Finalement, suivant les circonstances correspondant aux cas a b c d, les niveaux d'eau dans le tube 24 et la pression d'eau au point A sont respectivement ho h, h2 h3 et Po P, P2 P3 satisfaisant aux inégalités:

Figure imgb0005
Finally, according to the circumstances corresponding to the cases abcd, the water levels in the tube 24 and the water pressure at point A are respectively h o h, h 2 h 3 and P o P, P 2 P 3 satisfying the inequalities :
Figure imgb0005

La fig. 2 montre à titre d'exemple selon un mode de réalisation de l'invention, comment celle-ci met à profit cette gradation de pression pour concevoir et organiser des moyens qui, en cas de chute à terre de la canne de vidange, émettent une alarme et pratiquement simultanément provoquent l'arrêt de la pompe de vidange si celle-ci est en marche, ces moyens étant commandés à l'aide de moyens associés au détecteur de pression au point A de la fig. 1. Dans le cas du manomètre à membrane mobile de la fig. 1 et repris sur la fig. 2, la commande s'effectue par le déplacement de cette membrane 26. A cette fin, la membrane 26 est munie du côté du corps 27 de la pièce 31. Cette pièce est fixée d'une manière indéformable à 26. Ses extrémités 32 et 33 en forme de sphère par exemple appuient sur les bras de levier respectivement 34 et 35, lesquels sont liés élastiquement à la paroi 36 au moyen de ressorts respectivement 37 et 38 agissant en comression et sont mobiles autour des axes respectivement 39 et 40 perpendiculaires au plan de la feuille. Ces bras de levier sont conducteurs électriques sur leur partie s'étendant depuis leur axe respectif jusqu'aux points respectivement K et L. La course du mouvement de rotation de ces bras de levier en partie conducteurs s'étend pour chacun d'eux, lors du mouvement de la membrane 26, entre les couples de plots respectivement 41,42 et 43, 44. Les plots 42 et 44 sont reliés chacun au potentiel de la masse à travers respectivement la pompe de vidange 45 et un appareil 46 émettant une alarme (sonore ou lumineuse), tandis que les plots 41 et 43 sont isolés ou reliés à la masse. Les axes 39 et 40 sont portés tous deux au potentiel de la tension HT d'alimentation desdites pompe et alarme. Les positions en hauteur des plots 41 et 42 dans le corps de chambre 27 sont déterminées pour que lorsque la pression dans la canalisation d'évacuation au point A correspondant à P2 et P3 et donc pour les positions correspondantes de la membrane 26, le levier 34 soit en contact pour sa partie conductrice avec les plots respectivement 41 et 42, ce qui correspond respectivement à l'arrêt ou la marche de la pompe de vidange pour une position de canne de vidange qui, rappelons-le, est respectivement à terre ou en l'air. Les positions des plots 44 et 43 sont déterminées en rapport avec celles du plot 41 pour que lorsque la pression dans la canalisation corresponde respectivement à pompe arrêtée canne à terre (Po) ou en l'air (Pi ), et pour des positions correspondantes de la membrane 26, le bras de levier 35 soit en contact respectivement avec 44 ou 43, le contact entre 41 et 34 étant assuré, ce qui entraîne la mise en activité ou non de l'alarme 46, suivant que la pression est Po ou P,.Fig. 2 shows by way of example according to an embodiment of the invention, how the latter takes advantage of this pressure gradation to design and organize means which, in the event of the drain rod falling to the ground, emit a alarm and practically simultaneously cause the drain pump to stop if it is running, these means being controlled using means associated with the pressure detector at point A in FIG. 1. In the case of the moving diaphragm pressure gauge in fig. 1 and shown in fig. 2, the control is effected by the displacement of this membrane 26. To this end, the membrane 26 is provided on the side of the body 27 of the part 31. This part is fixed in a non-deformable manner to 26. Its ends 32 and 33 in the form of a sphere for example press on the lever arms respectively 34 and 35, which are connected elastically to the wall 36 by means of springs respectively 37 and 38 acting in compression and are movable around the axes respectively 39 and 40 perpendicular to the plane of the sheet. These lever arms are electrically conductive on their part extending from their respective axis to points K and L respectively. The stroke of the rotational movement of these partly conductive lever arms extends for each of them, during of the movement of the membrane 26, between the pairs of studs 41,42 and 43, 44 respectively. The studs 42 and 44 are each connected to the ground potential respectively through the drain pump 45 and an apparatus 46 emitting an alarm ( sound or light), while the studs 41 and 43 are isolated or grounded. The axes 39 and 40 are both brought to the potential of the HV supply voltage of said pump and alarm. The height positions of the studs 41 and 42 in the chamber body 27 are determined so that when the pressure in the evacuation pipe at point A corresponding to P 2 and P 3 and therefore for the corresponding positions of the membrane 26, the lever 34 is in contact for its conductive part with the pads 41 and 42 respectively, which corresponds respectively to the stop or the running of the drain pump for a position of the drain rod which, let us recall, is respectively on the ground or in the air. The positions of the pads 44 and 43 are determined in relation to those of the pad 41 so that when the pressure in the pipeline corresponds respectively to the pump stopped, the rod on land (P o ) or in the air (P i ), and for positions corresponding to the diaphragm 26, the lever arm 35 is in contact respectively with 44 or 43, the contact between 41 and 34 being ensured, which causes the activation or not of the alarm 46, depending on whether the pressure is P o or P ,.

Il s'ensuit, avec un tel système, que d'une part, en cas de canne de vidange tombant à terre alors que la pompe est en marche, on assiste successivement ou pratiquement en même temps à l'arrêt .de la pompe, puis la pression passant de P2 à Po, à l'activation de l'alarme, et que d'autre part, en cas de canne de vidange tombant à terre alors que la pompe n'est pas en marche, celle-ci reste à l'arrêt et l'alarme est activée.It follows, with such a system, that on the one hand, in the event of a drain rod falling to the ground while the pump is running, there is successively or practically at the same time stopping the pump, then the pressure going from P 2 to P o , when the alarm is activated, and on the other hand, in the event of a drain rod falling to the ground when the pump is not running, it remains stationary and the alarm is activated.

Ce système pourrait être mis en défaut et sujet à fausse alarme lorsque la canne de vidange étant en l'air elle ne contiendrait pas d'eau (pression en A: Po). Ce pourrait être le cas lorsque après une chute à terre, celle-ci aurait été remise à sa place normale. II convient alors de tester le système, par exemple au début d'un cycle de lavage. L'invention a prévu un amorçage de la canne de vidange. En début de cycle la pompe est alimentée par un circuit comportant le contacteur 47 à deux positions respectivement 48 et 49, ce contacteur étant dans la position 48. Ce contacteur est lié au relais temporisé 50 au moyen de la liaison 51, ledit relais en série avec la résistance 53 et la diode 54 étant placé en parallèle sur l'alimentation de la pompe. Ce relais dont la constante d'action est de l'ordre de quelques secondes, fonction de la capacité 52 et de la résistance 53, fait basculer le contacteur de la position 48 à 49. La partie du système décrite en premier lieu peut alors fonctionner comme déjà expliqué, «constater» la position de la canne de vidange à terre ou en l'air et prendre éventuellement les mesures de préventions adéquates.This system could be faulted and subject to false alarm when the drain rod is in the air it would not contain water (pressure in A: P o ). This could be the case when after falling to the ground, it would have been returned to its normal place. It is then advisable to test the system, for example at the start of a washing cycle. The invention provides for priming the drain rod. At the start of the cycle, the pump is supplied by a circuit comprising the contactor 47 with two positions 48 and 49 respectively, this contactor being in position 48. This contactor is linked to the time relay 50 by means of the link 51, said relay in series with the resistor 53 and the diode 54 being placed in parallel on the supply of the pump. This relay whose action constant is of the order of a few seconds, depending on the capacity 52 and the resistance 53, switches the contactor from position 48 to 49. The part of the system described first can then operate as already explained, "note" the position of the drain rod on the ground or in the air and possibly take the appropriate preventive measures.

II va desoi que le système décrit peut faire l'objet de variantes qui s'inspirent de ce qui vient d'être décrit et font partie de l'invention. En particulier, le détecteur de pression au point A peut être à membrane déformable, la déformation de ladite membrane commandant alors les circuits électriques d'alimentation de la pompe et de l'émetteur d'alarme.It goes without saying that the system described can be the subject of variants which are inspired by what has just been described and form part of the invention. In particular, the pressure detector at point A may have a deformable membrane, the deformation of said membrane then controlling the electrical circuits supplying the pump and the alarm transmitter.

Claims (5)

1. A laundry or other washing machine comprising a washing tub in whose bottom an outlet is formed to which the discharge pump is connected, the pump outlet being connected to the rising leg of a tube having an inverted U-shape whose top portion, which is situated at a level which is at least equal to the maximum water level in the tub, is vented to the atmosphere via a tube connected to said top portion and terminating in the empty upper part of the tub, and whose falling leg feeds the water to be drained towards the sewer system, characterized in that the falling leg of the U is connected to said sewer system via a detachable discharge tube having an inverted-J shape, which tube is normally in a substantially vertical position, a pressure detector is connected to the water- discharge system at the point where said falling leg and the inverted-J tube are connected to each other, and there are provided alarm and discharge- pump start/stop control means, which means are electrically energized via a circuit including means associated with said pressure detector.
2. A laundry or other washing machine as claimed in Claim 1, characterized in that the control means associated with the pressure detector in this decreasing order respond to pressure values P3, P2, Po, Po being the pressure which is detected when the dischare pump is inoperative and the inverted-J discharge tube lies on the floor, P2 being the pressure which is detected when the discharge pump is operative and the inverted-J discharge lies on the floor, and P3 being the pressure which is detected when the discharge pump is operative and the inverted-J discharge tube is in the correct position.
3. A laundry or other washing machine as claimed in Claim 1 or 2, characterized in that the pressure detector is of a type comprising a tube which is connected to the discharge system and which terminates in a cylindrical detector chamber comprising two compartments separated by a diaphragm which moves perpendicularly to itself under the influence of a pressure variation, and the control means comprise an element which is rigidly connected to the diaphragm and two two-position contactors which are secured to the upper compartment of the detector chamber, said contactors being arranged in the power-supply circuits of the discharge pump and an alarm system respectively, said element causing the two contactors to change over when the pressure varies from P3 to Po, to interrupt the power-supply circuit of the discharge pump for the value P2 and to close the alarm circuit for the value Po.
4. A laundry or other washing machine as claimed in Claim 1 or 2, characterized in that the pressure detector is of a type comprising a tube which is connected to the discharge system and which opens into a detector chamber comprising two compartments separated by a deformable diaphragm, and the control means comprise elements which are rigidly connected to the diaphragm, which are responsive to the deformation of the diaphragm and which supply a control signal to open or close the power-supply circuit of the discharge pump and the alarm system respectively when the pressure varies from P3 to Po.
5. A laundry or other washing machine as claimed in anyone of the Claims 1 to 4, characterized in that the power-supply circuit for the discharge pump comprises two auxiliary circuits arranged in parallel with the actual power-supply of said pump, namely one circuit comprising a time- lag relay and its timing elements and the other circuit comprising a two-position contactor in series with the discharge pump, the armature of the relay being connected to the contactor and causing the contactor to change-over from the closed position to the open position.
EP83201529A 1982-10-29 1983-10-25 Washing machine for laundry or the like with a safety or alarm device in case the drain hose drops on the floor Expired EP0110448B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8218257A FR2535354A1 (en) 1982-10-29 1982-10-29 WASHING MACHINE OR OTHERWISE PROVIDED WITH A SAFETY DEVICE OR ALARM IN THE EVENT OF FALLING THE CANE OF DRAINING WATER ON THE GROUND
FR8218257 1982-10-29

Publications (2)

Publication Number Publication Date
EP0110448A1 EP0110448A1 (en) 1984-06-13
EP0110448B1 true EP0110448B1 (en) 1986-01-29

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EP83201529A Expired EP0110448B1 (en) 1982-10-29 1983-10-25 Washing machine for laundry or the like with a safety or alarm device in case the drain hose drops on the floor

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EP (1) EP0110448B1 (en)
JP (1) JPS5995098A (en)
DE (1) DE3362037D1 (en)
FR (1) FR2535354A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831555B4 (en) * 1998-07-14 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Fluid-carrying household appliance with monitoring of the drain hose
KR100751763B1 (en) * 2005-12-16 2007-08-24 주식회사 대우일렉트로닉스 Cuff structure of drum type washing machine
DE102010040444B4 (en) * 2010-09-08 2017-08-10 BSH Hausgeräte GmbH Water-conducting household appliance, in particular dishwasher
TR201717071T1 (en) * 2015-07-06 2018-07-23 Arcelik As A Safe Operated Dishwasher
CN108553063B (en) * 2018-06-06 2024-05-17 广东洁诺生活电器有限公司 Dish washer drainage detecting system and dish washer
CN114687156B (en) * 2020-12-30 2023-11-03 无锡小天鹅电器有限公司 Clothes treatment equipment and control method thereof
CN113397323B (en) * 2021-06-22 2022-06-21 上海工程技术大学 Integrated intelligent kitchen appliance convenient to maintain

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US3091111A (en) * 1962-08-20 1963-05-28 Paul B Cruse Washing machine overflow control unit
US3346000A (en) * 1963-09-26 1967-10-10 Gen Electric Anti-siphon device for an automatic washer
DE2226698C3 (en) * 1972-05-25 1980-10-30 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Washing machine or dishwasher
US4069837A (en) * 1976-03-23 1978-01-24 Jirasek James D Washing machine overflow control means

Also Published As

Publication number Publication date
JPS5995098A (en) 1984-05-31
FR2535354A1 (en) 1984-05-04
EP0110448A1 (en) 1984-06-13
FR2535354B1 (en) 1985-02-01
DE3362037D1 (en) 1986-03-13

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