[go: up one dir, main page]

EP0080948A1 - Low noise dish washer with limited water consumption - Google Patents

Low noise dish washer with limited water consumption Download PDF

Info

Publication number
EP0080948A1
EP0080948A1 EP82402158A EP82402158A EP0080948A1 EP 0080948 A1 EP0080948 A1 EP 0080948A1 EP 82402158 A EP82402158 A EP 82402158A EP 82402158 A EP82402158 A EP 82402158A EP 0080948 A1 EP0080948 A1 EP 0080948A1
Authority
EP
European Patent Office
Prior art keywords
pump
cycling
water
filling
dishwasher according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82402158A
Other languages
German (de)
French (fr)
Other versions
EP0080948B1 (en
Inventor
Benoit Gailledrat
Laurent Didier
Camille Barbier
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 EP0080948A1 publication Critical patent/EP0080948A1/en
Application granted granted Critical
Publication of EP0080948B1 publication Critical patent/EP0080948B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4244—Water-level measuring or regulating arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4209—Insulation arrangements, e.g. for sound damping or heat insulation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/50—Racks ; Baskets
    • A47L15/507—Arrangements for extracting racks, e.g. roller supports

Definitions

  • the invention relates to a dishwasher.
  • a dishwasher usually includes a cycling pump that draws water from a tank to spray it onto the dishes to be cleaned. After this projection the water falls back into the tank and is again sucked up by the pump through a filter. There is also a drain pump to empty the tank at the end of the wash.
  • This pump which rotates during this filling, then sucks in a mixture of air and water and the pressure in the pump body is relatively low. This pressure rises suddenly when water enters said conduit, the pump then sucking more air but only water. This sudden increase in pressure is used to interrupt the filling of water.
  • the dishwasher according to the invention which is of the same type as that of US Patent 3,415,261, does not have this drawback.
  • the dishwasher is arranged in such a way that, during said filling, the water can only enter the pump body through its lower part, the upper part being in communication with the atmosphere via said drove.
  • the cycling pump may have additional vanes facing the duct which suck in air during filling and help keep the cycling pump primed.
  • the drain pump and the cycling pump are driven by the same motor and, to reduce the noise during draining, the cycling pump has auxiliary vanes (which can be confused with the additional blades mentioned above) defusing this pump from the start of the emptying, the pump body being in connection with the atmosphere via a chimney opening above the free surface of the water in the tank.
  • This chimney thus has a double function: it keeps the cycling pump deactivated during filling and it also serves to deactivate this pump during emptying.
  • the vertical duct, or chimney is coaxial with the wheel of the cycling pump.
  • the dishwasher comprises at its base a tank or tank 10 in the bottom of which is disposed the drain pump 12 driven by the shaft 13 of an electric motor 14 installed under the bottom of the tank 10.
  • This shaft 13 is therefore vertical and extends above the drain pump 12 to drive the cycling pump 15, the purpose of which is to draw the water 11 in order to spray it under pressure towards baskets (not shown) containing the dishes to be cleaned.
  • the body 16 of the cycling pump 15 is connected to a first pipe 17 opening into a rotating reel 18 projecting the water onto the dishes.
  • the body of the cycling pump is also connected to another pipe 19 opening into another reel (not shown) located in the upper position in the frame of the dishwasher.
  • the water which has been projected onto the dishes falls back into the tank 10 and is sucked in again by the pump 15 after passing through a filter 40.
  • the pump 15 comprises a wheel driven by the shaft 13.
  • This wheel comprises a flange 20 (FIG. 2) from the lower face of which protruding vanes 21 intended to ensure the actual cycling and from the upper face of which are protruding other vanes 23 of height slightly lower than that of the vanes 21 and whose role is to deactivate the pump during emptying in order to avoid annoying noises and to prevent priming during filling.
  • the vanes 21 and 23 do not have a radial position; they occupy a certain angular sector.
  • Each vane 21 has a circumferential end 21a and an inner end 21b: the angular sector is traversed in the direction of counterclockwise from 21 to 21 b.
  • each blade 23 has a circumferential end 23a and an inner end 23b.
  • the angular sector is traversed in the opposite direction to that of the needles of a watch from 23a to 23 b '
  • the orientation of the blades 23 is in the opposite direction to the orientation of the blades 21.
  • the body 25 of the drain pump 12 is connected to the evacuation pipe 26 by means of a non-return valve 27 preventing the suction, by the pump 12, of liquid in the pipe 26.
  • the suction end 28 of the cycling pump 15 is at the base of the body 16 of this pump.
  • the body 16 of the cycling pump is extended upwards by a duct or chimney 30 whose axis coincides with that of the shaft 13 and therefore with that of the wheels of the pumps 12 and 15.
  • the body of the cycling pump 15 is in relation to a pressure switch 31 a which thus detects the water pressure produced by this pump.
  • the pressure switch 31 controls a solenoid valve 32 which is open when the tank 10 is to be filled with water.
  • This pressure switch is such that as long as the water pressure it detects is below a PN value ( Figure 3) the solenoid valve 32 remains open while this solenoid valve is closed when the pressure has reached this value p N .
  • this cycling pump can hardly be started as long as the upper end 31 of the chimney 30 is in the air.
  • the water pressure delivered by this pump is therefore relatively low. Its value is noted p l in FIG. 3. Although this value does not allow jets of water having the pressure necessary to carry out the washing, however, with this pressure, the pump produces small jets which spray the dishes. These small jets of water allow, when the dishwasher is supplied directly with hot water, progressive heating of the dishes and, after washing with hot water, progressive cooling before rinsing with cold water.
  • the pump 15 does not start until the free surface of the filling water has reached the end 31 and thus enters the body 16 through the chimney 30.
  • the outlet pressure of the pump, detected by the pressure switch 31a, then rises sharply and reaches the value p N.
  • the solenoid valve 32 is then closed to stop filling.
  • the pressure p is plotted on the ordinate and the quantity q of water introduced into the reservoir is shown on the abscissa.
  • the quantity q corresponds to the moment when the water begins to enter the chimney 30, the free surface having reached the end 31.
  • the pump Once the pump has been primed, it sucks up a greater quantity of water than before it was primed and, consequently, the free surface of the water drops sharply below the level of the end 31. This is however not bothersome because it has been found that the pump does not prime.
  • the solenoid valve 32 is closed as soon as the pressure detected by the pressure switch 31a reaches the value p N, the quantity of water introduced is the quantity q 1 .
  • a control means is provided to keep the solenoid valve 32 open for a determined time after detection of the priming of the pump. Under these conditions the level of the free surface of the water may, when washing the dishes, be above the level of the end 31.
  • the operation is not noisy because the pump 15 mainly mixes air. It has in fact been found that the pump is noisy when it sucks in a mixture of water and air. As shown in Figure 3, the pump hardly ever works with such a mixture of air and water because the transition between the defused state and the primed state is sudden; this transition is represented by a line segment 35 parallel to the ordinate axis P.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detergent Compositions (AREA)

Abstract

1. Dish-washer wherein the stopping of the water supply is controlled when the pressure within the body (16) of the cycling pump (15), which is operative during the supply, rises suddenly, this body (16) communicating with the atmosphere during the supply through a conduit (30) the upper end of which (31) is substantially located at the desired level of the free surface of the water within the dish-washer, characterized in that the cycling pump comprises above the arms (21) used for the cycling and in the neighbourhood of the conduit (30) auxiliary arms (23) for aspirating air during the water supply so that in the course of this supply the pump substantially moves but air, these auxiliary arms further permitting the emptying of the cycling pump during discharge and in that the body (16) of the cycling pump (15) is such that during the water supply the water (11) can penetrate into this body only through its lower portion (28).

Description

L'invention est relative à un lave-vaisselle.The invention relates to a dishwasher.

Un lave-vaisselle comprend habituellement une pompe de cyclage aspirant l'eau d'un réservoir pour la projeter sur la vaisselle à nettoyer. Après cette projection l'eau retombe dans le réservoir et est de nouveau aspirée par la pompe à travers un filtre. On prévoit également une pompe de vidange pour vider le réservoir en fin de lavage.A dishwasher usually includes a cycling pump that draws water from a tank to spray it onto the dishes to be cleaned. After this projection the water falls back into the tank and is again sucked up by the pump through a filter. There is also a drain pump to empty the tank at the end of the wash.

On sait qu'on a intérêt à limiter la quantité d'eau utilisée pour laver la vaisselle afin de réduire, pour l'utilisateur, les frais de fonctionnement de la machine en raison, d'une part, du prix de l'eau proprement dite et, d'autre part, du prix du chauffage de cette eau. C'est pourquoi on a déjà proposé des moyens permettant d'atteindre avec précision le niveau d'eau souhaité dans le lave-vaisselle. Ainsi dans le brevet US 3 415 261 est décrit un lave-vaisselle dans lequel l'arrêt du remplissage en eau est interrompu quand l'eau atteint le niveau supérieur d'un conduit, ce niveau correspondant à celui souhaité pour l'eau dans le réservoir. Ce conduit met en communication le corps de la pompe de cyclage avec l'atmosphère lors du remplissage. Cette pompe, qui tourne lors de ce remplissage, aspire alors un mélange d'air et d'eau et la pression dans le corps de pompe est relativement faible. Cette pression s'élève brusquement lorsque l'eau pénètre dans ledit conduit, la pompe n'aspirant alors plus d'air mais seulement de l'eau. Cette brusque élévation de pression est mise à profit pour interrompre le remplissage en eau.We know that it is in our interest to limit the amount of water used to wash dishes in order to reduce, for the user, the operating costs of the machine due, on the one hand, to the price of the water itself said and, on the other hand, the price of heating this water. This is why we have already proposed means making it possible to precisely reach the desired level of water in the dishwasher. Thus, in US Pat. No. 3,415,261, a dishwasher is described in which the stopping of filling with water is interrupted when the water reaches the upper level of a duct, this level corresponding to that desired for the water in the tank. This duct communicates the body of the cycling pump with the atmosphere during filling. This pump, which rotates during this filling, then sucks in a mixture of air and water and the pressure in the pump body is relatively low. This pressure rises suddenly when water enters said conduit, the pump then sucking more air but only water. This sudden increase in pressure is used to interrupt the filling of water.

Mais l'aspiration d'un mélange d'air et d'eau lors du remplissage provoque une cavitation et, ainsi (comme on l'a constaté) un bruit relativement important, ce qui est particulièrement gênant pour un appareil ménager.But the suction of a mixture of air and water during filling causes cavitation and, thus (as has been observed) a relatively large noise, which is particularly annoying for a household appliance.

Le lave-vaisselle selon l'invention, qui est du même type que celui du brevet US 3 415 261, ne présente pas cet inconvénient.The dishwasher according to the invention, which is of the same type as that of US Patent 3,415,261, does not have this drawback.

Il est caractérisé en ce qu'il est agencé pour que, lors du remplissage, la pompe de cyclage aspire exclusivement (ou presque exclusivement) de l'air. De cette manière le fonctionnement est peu bruyant au remplissage tout en restant économe en eau.It is characterized in that it is arranged so that, during filling, the cycling pump sucks exclusively (or almost exclusively) air. In this way the operation is noisy during filling while remaining economical in water.

Dans une réalisation le lave-vaisselle est agencé de façon telle que, lors dudit remplissage, l'eau ne peut pénétrer dans le corps de pompe que par sa partie inférieure, la partie supérieure étant en communication avec l'atmosphère par l'intermédiaire dudit conduit.In one embodiment, the dishwasher is arranged in such a way that, during said filling, the water can only enter the pump body through its lower part, the upper part being in communication with the atmosphere via said drove.

La pompe de cyclage peut comporter des aubes supplémentaires tournées vers le conduit qui aspirent l'air lors du remplissage et contribuent à maintenir la pompe de cyclage désamorcée.The cycling pump may have additional vanes facing the duct which suck in air during filling and help keep the cycling pump primed.

Dans le mode de réalisation préféré de l'invention, la pompe de vidange et la pompe de cyclage sont entrainées par le même moteur et, pour réduire le bruit lors de la vidange, la pompe de cyclage présente des aubes auxiliaires (qui peuvent être confondues avec les aubes supplémentaires mentionnées ci-dessus) désamorçant cette pompe dès le début de la vidange, le corps de pompe étant en liaison avec l'atmosphère par l'intermédiaire d'une cheminée débouchant au-dessus de la surface libre de l'eau dans le réservoir. Cette cheminée a ainsi une double fonction : elle maintient la pompe de cyclage désamorcée au cours du remplissage et elle sert également à désamorcer cette pompe au cours de la vidange.In the preferred embodiment of the invention, the drain pump and the cycling pump are driven by the same motor and, to reduce the noise during draining, the cycling pump has auxiliary vanes (which can be confused with the additional blades mentioned above) defusing this pump from the start of the emptying, the pump body being in connection with the atmosphere via a chimney opening above the free surface of the water in the tank. This chimney thus has a double function: it keeps the cycling pump deactivated during filling and it also serves to deactivate this pump during emptying.

De préférence le conduit vertical, ou cheminée, est coaxial à la roue de la pompe de cyclage.Preferably the vertical duct, or chimney, is coaxial with the wheel of the cycling pump.

D'autres caractéristiques et avantages de `l'invention apparaîtront avec la description de l'un de ses modes de réalisation, celle-ci étant effectuée en se référant aux dessins ci-annexés sur lesquels :

  • - la figure 1 est une coupe schématique d'une partie d'un lave-vaisselle selon l'invention,
  • - la figure 2 est un schéma de la roue d'une pompe de cyclage du lave-vaisselle de la figure 1, et
  • - la figure 3 est un diagramme illustrant le fonctionnement du lave-vaisselle de l'invention.
Other characteristics and advantages of the invention will appear with the description of one of its embodiments, this being carried out with reference to the attached drawings in which:
  • FIG. 1 is a schematic section of part of a dishwasher according to the invention,
  • FIG. 2 is a diagram of the impeller of a cycling pump of the dishwasher of FIG. 1, and
  • - Figure 3 is a diagram illustrating the operation of the dishwasher of the invention.

Le lave-vaisselle comprend à sa base un réservoir ou cuve 10 dans le fond duquel est disposée la pompe de vidange 12 entrainée par l'arbre 13 d'un moteur électrique 14 installé sous le fond de la cuve 10. Cet arbre 13 est donc vertical et se prolonge au-dessus de la pompe de vidange 12 pour entrainer la pompe de cyclage 15 dont le but est d'aspirer l'eau 11 pour la projeter sous pression vers des paniers (non représentés) contenant la vaisselle à nettoyer. A cet effet le corps 16 de la pompe de cyclage 15 est relié à une première canalisation 17 débouchant dans un moulinet tournant 18 projetant l'eau sur la vaisselle. Le corps de la pompe de cyclage est également relié à une autre canalisation 19 débouchant dans un autre moulinet (non représenté) se trouvant en position supérieure dans le bâti du lave-vaisselle.The dishwasher comprises at its base a tank or tank 10 in the bottom of which is disposed the drain pump 12 driven by the shaft 13 of an electric motor 14 installed under the bottom of the tank 10. This shaft 13 is therefore vertical and extends above the drain pump 12 to drive the cycling pump 15, the purpose of which is to draw the water 11 in order to spray it under pressure towards baskets (not shown) containing the dishes to be cleaned. To this end, the body 16 of the cycling pump 15 is connected to a first pipe 17 opening into a rotating reel 18 projecting the water onto the dishes. The body of the cycling pump is also connected to another pipe 19 opening into another reel (not shown) located in the upper position in the frame of the dishwasher.

L'eau qui a été projetée sur la vaisselle retombe dans la cuve 10 et est aspirée de nouveau par la pompe 15 après passage à travers un filtre 40.The water which has been projected onto the dishes falls back into the tank 10 and is sucked in again by the pump 15 after passing through a filter 40.

La pompe 15 comprend une roue entrainée par l'arbre 13. Cette roue comporte un flasque 20 (figure 2) de la face inférieure duquel sont en saillie des aubes 21 destinées à assurer le cyclage proprement dit et de la face supérieure duquel sont en saillie d'autres aubes 23 de hauteur légèrement inférieure à celle des aubes 21 et dont le rôle est de désamorcer la pompe lors de la vidange afin d'éviter les bruits gênants et d'empêcher l'amorçage lors du remplissage.The pump 15 comprises a wheel driven by the shaft 13. This wheel comprises a flange 20 (FIG. 2) from the lower face of which protruding vanes 21 intended to ensure the actual cycling and from the upper face of which are protruding other vanes 23 of height slightly lower than that of the vanes 21 and whose role is to deactivate the pump during emptying in order to avoid annoying noises and to prevent priming during filling.

Les aubes 21 et 23 n'ont pas une position radiale; elles occupent un certain secteur angulaire. Chaque aube 21 présente une extrémité périphérique 21a et une extrémité interne 21b : le secteur angulaire est parcouru dans le sens des aiguilles d'une montre de 21a à 21b. De même chaque aube 23 présente une extrémité périphérique 23a et une extrémité interne 23b. Le secteur angulaire est parcouru dans le sens contraire de celui des aiguilles d'une montre de 23a à 23b' En d'autres termes l'orientation des aubes 23 est en sens contraire de l'orientation des aubes 21.The vanes 21 and 23 do not have a radial position; they occupy a certain angular sector. Each vane 21 has a circumferential end 21a and an inner end 21b: the angular sector is traversed in the direction of counterclockwise from 21 to 21 b. Similarly, each blade 23 has a circumferential end 23a and an inner end 23b. The angular sector is traversed in the opposite direction to that of the needles of a watch from 23a to 23 b ' In other words the orientation of the blades 23 is in the opposite direction to the orientation of the blades 21.

Le corps 25 de la pompe de vidange 12 est relié à la canalisation 26 d'évacuation par l'intermédiaire d'une vanne 27 anti-retour empêchant l'aspiration, par la pompe 12, de liquide dans la canalisation 26.The body 25 of the drain pump 12 is connected to the evacuation pipe 26 by means of a non-return valve 27 preventing the suction, by the pump 12, of liquid in the pipe 26.

L'extrémité d'aspiration 28 de la pompe de cyclage 15 est à la base du corps 16 de cette pompe.The suction end 28 of the cycling pump 15 is at the base of the body 16 of this pump.

Le corps 16 de la pompe de cyclage est prolongé vers le haut par un conduit ou cheminée 30 dont l'axe est confondu avec celui de l'arbre 13 et donc avec celui des roues des pompes 12 et 15.The body 16 of the cycling pump is extended upwards by a duct or chimney 30 whose axis coincides with that of the shaft 13 and therefore with that of the wheels of the pumps 12 and 15.

Le corps de la pompe de cyclage 15 est en relation avec un pressostat 31 a qui détecte ainsi la pression d'eau produite par cette pompe. Le pressostat 31 a commande une électrovanne 32 qui est ouverte lorsqu'on veut remplir d'eau la cuve 10.The body of the cycling pump 15 is in relation to a pressure switch 31 a which thus detects the water pressure produced by this pump. The pressure switch 31 controls a solenoid valve 32 which is open when the tank 10 is to be filled with water.

Le réglage de ce pressostat est tel que tant que la pression d'eau qu'il détecte est inférieure à une valeur PN (figure 3) l'électrovanne 32 reste ouverte tandis que cette électrovanne est fermée lorsque la pression a atteint cette valeur pN.The setting of this pressure switch is such that as long as the water pressure it detects is below a PN value (Figure 3) the solenoid valve 32 remains open while this solenoid valve is closed when the pressure has reached this value p N .

Le fonctionnement est le suivant :

  • Pour le remplissage du réservoir 10 l'électrovanne 32 est ouverte. Le moteur 14 est alors mis sous tension et tourne dans le sens de la flèche F (figure 2) correspondant au fonctionnement normal de la pompe de cyclage 21 et au sens inverse du fonctionnement normal de la pompe de vidange.
The operation is as follows:
  • For filling the reservoir 10 the solenoid valve 32 is open. The motor 14 is then energized and rotates in the direction of the arrow F (FIG. 2) corresponding to the normal operation of the cycling pump 21 and to the opposite direction of the normal operation of the drain pump.

Du fait de la présence, d'une part, de la cheminée 30 qui met le corps 16 de pompe 15 en communication avec l'atmosphère et, d'autre part, des aubes auxiliaires 23 qui créent une (faible) aspiration d'air lors du remplissage, cette pompe de cyclage ne peut pratiquement pas s'amorcer tant que l'extrémité supérieure 31 de la cheminée 30 est à l'air. La pression d'eau refoulée par cette pompe est donc relativement faible. Sa valeur est notée pl sur la figure 3. Bien que cette valeur ne permette pas des jets d'eau ayant la pression nécessaire pour effectuer le lavage, cependant, avec cette pression, la pompe produit des petits jets qui aspergent la vaisselle. Ces petits jets d'eau permettent, lorsque le lave-vaisselle est alimenté directement en eau chaude, un chauffage progressif de la vaisselle et, après le lavage en eau chaude, un refroidissement progressif avant le rinçage en eau froide.Due to the presence, on the one hand, of the chimney 30 which puts the pump body 16 15 in communication with the atmosphere and, on the other hand, auxiliary vanes 23 which create a (weak) air intake during filling, this cycling pump can hardly be started as long as the upper end 31 of the chimney 30 is in the air. The water pressure delivered by this pump is therefore relatively low. Its value is noted p l in FIG. 3. Although this value does not allow jets of water having the pressure necessary to carry out the washing, however, with this pressure, the pump produces small jets which spray the dishes. These small jets of water allow, when the dishwasher is supplied directly with hot water, progressive heating of the dishes and, after washing with hot water, progressive cooling before rinsing with cold water.

La pompe 15 ne s'amorce que lorsque la surface libre de l'eau de remplissage a atteint l'extrémité 31 et pénètre ainsi dans le corps 16 par la cheminée 30. La pression de sortie de la pompe, détectée par le pressostat 31a, monté alors brusquerrent et atteint la valeur pN. L'électrovanne 32 est alors fermée pour arrêter le remplissage.The pump 15 does not start until the free surface of the filling water has reached the end 31 and thus enters the body 16 through the chimney 30. The outlet pressure of the pump, detected by the pressure switch 31a, then rises sharply and reaches the value p N. The solenoid valve 32 is then closed to stop filling.

Sur la figure 3 on a porté en ordonnées la pression p et en abscisses la quantité q d'eau introduite dans le réservoir 10. La quantité q correspond au moment où l'eau commence à pénétrer dans la cheminée 30, la surface libre ayant atteint l'extrémité 31.In FIG. 3, the pressure p is plotted on the ordinate and the quantity q of water introduced into the reservoir is shown on the abscissa. The quantity q corresponds to the moment when the water begins to enter the chimney 30, the free surface having reached the end 31.

Une fois la pompe amorcée celle-ci aspire une plus grande quantité d'eau qu'avant son amorçage et en conséquence la surface libre de l'eau descend brusquement au-dessous du niveau de l'extrémité 31. Ceci n'est cependant pas gênant car on a constaté que la pompe ne se désamorce pas.Once the pump has been primed, it sucks up a greater quantity of water than before it was primed and, consequently, the free surface of the water drops sharply below the level of the end 31. This is however not bothersome because it has been found that the pump does not prime.

Si l'électrovanne 32 est fermée dès que la pression détectée par le pressostat 31a atteint la valeur pN la quantité d'eau introduite est la quantité q1.If the solenoid valve 32 is closed as soon as the pressure detected by the pressure switch 31a reaches the value p N, the quantity of water introduced is the quantity q 1 .

Si l'on désire une quantité supplémentaire, par exemple q2 (figure 3), on prévoit un moyen de commande pour maintenir ouverte l'électrovanne 32 pendant un temps déterminé après détection de l'amorçage de la pompe. Dans ces conditions le niveau de la surface libre de l'eau peut, lors du lavage de la vaisselle, être au-dessus du niveau de l'extrémité 31.If an additional quantity is desired, for example q 2 (FIG. 3), a control means is provided to keep the solenoid valve 32 open for a determined time after detection of the priming of the pump. Under these conditions the level of the free surface of the water may, when washing the dishes, be above the level of the end 31.

Au remplissage le fonctionnement n'est pas bruyant car la pompe 15 brasse surtout de l'air. On a en effet constaté que la pompe est bruyante lorsqu'elle aspire un mélange d'eau et d'air. Comme le montre la figure 3, la pompe ne fonctionne pratiquement jamais avec un tel mélange d'air et d'eau car la transition entre l'état désamorcé et l'état amorcé est brusque; cette transition est représentée par un segment de droite 35 parallèle à l'axe des ordonnées P.During filling, the operation is not noisy because the pump 15 mainly mixes air. It has in fact been found that the pump is noisy when it sucks in a mixture of water and air. As shown in Figure 3, the pump hardly ever works with such a mixture of air and water because the transition between the defused state and the primed state is sudden; this transition is represented by a line segment 35 parallel to the ordinate axis P.

En outre la quantité d'eau introduite est extrêmement précise et il n'est donc pas besoin de mettre plus d'eau que nécessaire.In addition, the amount of water introduced is extremely precise and there is therefore no need to add more water than necessary.

Pour la vidange le sens de rotation du moteur est inversé. La pompe tourne dans le sens de la flèche f (figure 2). C'est la présence simultanée de la cheminée 30 mettant à l'air le corps de pompe 16 et des aubes 23 tournées en sens inverse des aubes 21 qui permet, au cours de la vidange, de désamorcer la pompe 15 et donc un fonctionnement peu bruyant lors de cette vidange. Toutefois, à l'instant où le cyclage est arrêté la vidange n'est pas encore intervenue et l'eau projetée retombe dans le réservoir 10, ce qui peut submerger la cheminée 30 et provoquer un fonctionnement bruyant au tout début de la phase de vidange. Mais cette particularité n'est pas gênante car, si un tel bruit intervient, il ne dure qu'une fraction de seconde.For emptying the direction of rotation of the motor is reversed. The pump rotates in the direction of arrow f (figure 2). It is the simultaneous presence of the chimney 30 venting the pump body 16 and vanes 23 turned in the opposite direction to the vanes 21 which makes it possible, during the emptying, to deactivate the pump 15 and therefore little operation. noisy during this emptying. However, at the moment when the cycling is stopped, the emptying has not yet taken place and the projected water falls back into the tank 10, which can submerge the chimney 30 and cause noisy operation at the very start of the emptying phase. . But this feature is not a problem, because if such noise occurs, it lasts only a fraction of a second.

Claims (10)

1. Lave-vaisselle dans lequel J'arrêt du remplissage en eau est commandé lorsque la pression régnant dans le corps (16) de la pompe de cyclage (15), qui est en fonctionnement lors du remplissage, augmente brusquement, ce corps (16) étant, lors du remplissage, en communication avec l'atmosphère par l'intermédiaire d'un conduit (30) dont l'extrémité supérieure (31) est sensiblement au niveau souhaité pour la surface libre de l'eau dans le lave-vaisselle, caractérisé en ce qu'il est agencé pour que, lors du remplissage, quand la surface libre de l'eau est au-dessous de l'extrémité supérieure (31), la pompe brasse pratiquement seulement de l'air afin que ce remplissage soit peu bruyant.1. Dishwasher in which I stop filling with water is controlled when the pressure prevailing in the body (16) of the cycling pump (15), which is in operation during filling, increases suddenly, this body (16 ) being, during filling, in communication with the atmosphere via a conduit (30) whose upper end (31) is substantially at the level desired for the free surface of the water in the dishwasher , characterized in that it is arranged so that, during filling, when the free surface of the water is below the upper end (31), the pump essentially mixes air only so that this filling be little noisy. 2. Lave-vaisselle selon la revendication 1, caractérisé en ce que le corps (16) de la pompe de cyclage (15) est tel que, lors du remplissage en eau, cette dernière (11) ne peut pénétrer dans ce corps que par sa partie inférieure (28), la partie supérieure dudit corps communiquant alors exclusivement avec l'atmosphère.2. Dishwasher according to claim 1, characterized in that the body (16) of the cycling pump (15) is such that, when filling with water, the latter (11) can only enter this body by its lower part (28), the upper part of said body then communicating exclusively with the atmosphere. 3. Lave-vaisselle selon la revendication 2, caractérisé en ce que la pompe de cyclage comporte des aubes supplémentaires (23) au voisinage du conduit (30), et qui aspirent de l'air lors du remplissage en eau du lave-vaisselle.3. Dishwasher according to claim 2, characterized in that the cycling pump has additional vanes (23) in the vicinity of the duct (30), and which suck in air when filling the dishwasher with water. 4. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que le conduit (30) est vertical.4. Dishwasher according to any one of the preceding claims, characterized in that the duct (30) is vertical. 5. Lave-vaisselle selon la revendication 4, caractérisé en ce que le conduit (30) est coaxial à la roue (20, 21, 23) de la pompe de cyclage.5. Dishwasher according to claim 4, characterized in that the duct (30) is coaxial with the wheel (20, 21, 23) of the cycling pump. 6. Lave-vaisselle selon la revendication 5, caractérisé en ce que la pompe de cyclage (15) est entrainée par un arbre (13) entrainant également la pompe de vidange (12), cet arbre (13) étant lui-même entrainé par un moteur électrique (14) tournant dans un sens pour le cyclage et dans le sens contraire pour la vidange.6. Dishwasher according to claim 5, characterized in that the cycling pump (15) is driven by a shaft (13) also driving the drain pump (12), this shaft (13) being itself driven by an electric motor (14) rotating in one direction for cycling and in the opposite direction for emptying. 7. Lave-vaisselle selon la revendication 6, caractérisé en ce que la pompe de cyclage (15) comporte des aubes auxiliaires (23) au-dessus des aubes (21) destinées au cyclage, ces aubes auxiliaires permettant de désamorcer la pompe lors de la vidange et évitant ainsi le bruit.7. Dishwasher according to claim 6, characterized in that the cycling pump (15) comprises auxiliary vanes (23) au- above vanes (21) intended for cycling, these auxiliary vanes making it possible to deactivate the pump during emptying and thus avoiding noise. 8. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce que la pompe de cyclage engendre, lors du remplissage, une faible pression d'eau permettant cependant d'asperger la vaisselle.8. Dishwasher according to any one of the preceding claims, characterized in that the cycling pump generates, during filling, a low water pressure making it possible, however, to spray the dishes. 9. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un pressostat (31 ) sensible à la pression régnant dans le corps (16) de la pompe de cyclage (15) et commandant l'arrêt du remplissage dès que la pression dans le corps de la pompe correspond à un amorçage de cette dernière.9. Dishwasher according to any one of the preceding claims, characterized in that it comprises a pressure switch (31) sensitive to the pressure prevailing in the body (16) of the cycling pump (15) and controlling the stopping filling as soon as the pressure in the pump body corresponds to priming of the latter. 10. Lave-vaisselle selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un moyen pour introduire une quantité déterminée d'eau après qu'ait été détectée la pression (PN) correspondant à l'amorçage de la pompe de cyclage.10. Dishwasher according to any one of the preceding claims, characterized in that it comprises means for introducing a determined quantity of water after the pressure ( PN ) corresponding to the priming of the pump has been detected. cycling.
EP82402158A 1981-12-02 1982-11-26 Low noise dish washer with limited water consumption Expired EP0080948B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122587 1981-12-02
FR8122587A FR2517194B1 (en) 1981-12-02 1981-12-02 DISHWASHER USING A LIMITED QUANTITY OF WATER

Publications (2)

Publication Number Publication Date
EP0080948A1 true EP0080948A1 (en) 1983-06-08
EP0080948B1 EP0080948B1 (en) 1986-11-12

Family

ID=9264595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82402158A Expired EP0080948B1 (en) 1981-12-02 1982-11-26 Low noise dish washer with limited water consumption

Country Status (7)

Country Link
EP (1) EP0080948B1 (en)
AU (1) AU561252B2 (en)
DE (1) DE3274183D1 (en)
FI (1) FI74604C (en)
FR (1) FR2517194B1 (en)
GR (1) GR77111B (en)
NO (1) NO155374C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU766582B2 (en) * 1999-03-11 2003-10-16 Mind-Guard Ltd. Implantable stroke preventing device
EP2283759A1 (en) * 2009-08-05 2011-02-16 Electrolux Home Products Corporation N.V. Washer, such as a dishwasher or a washing machine, and method for operating a washer
EP2283760A1 (en) * 2009-08-05 2011-02-16 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating such a washer
US9751115B2 (en) 2009-08-05 2017-09-05 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating a washer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11284773B2 (en) 2020-01-31 2022-03-29 Haier Us Appliance Solutions, Inc. System and method for controlling the water fill level within a dishwasher appliance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294102A (en) * 1964-12-09 1966-12-27 Whirlpool Co Dishwashing apparatus having improved pump means
US3415261A (en) * 1966-02-28 1968-12-10 Westinghouse Electric Corp Dishwasher control

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294102A (en) * 1964-12-09 1966-12-27 Whirlpool Co Dishwashing apparatus having improved pump means
US3415261A (en) * 1966-02-28 1968-12-10 Westinghouse Electric Corp Dishwasher control

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU766582B2 (en) * 1999-03-11 2003-10-16 Mind-Guard Ltd. Implantable stroke preventing device
EP2283759A1 (en) * 2009-08-05 2011-02-16 Electrolux Home Products Corporation N.V. Washer, such as a dishwasher or a washing machine, and method for operating a washer
EP2283760A1 (en) * 2009-08-05 2011-02-16 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating such a washer
WO2011015314A3 (en) * 2009-08-05 2011-04-14 Electrolux Home Products Corporation N. V. Washer such as a dishwasher or a washing machine and method for operating such a washer
CN102573596A (en) * 2009-08-05 2012-07-11 伊莱克斯家用产品公司 Washing machines such as dishwashers or washing machines and methods of operating washing machines
US8845813B2 (en) 2009-08-05 2014-09-30 Electrolux Home Products Corporation N.V. Washer, such as a dishwasher or a washing machine, and method for operating a washer
US8845814B2 (en) 2009-08-05 2014-09-30 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating a washer
CN102573596B (en) * 2009-08-05 2014-11-05 伊莱克斯家用产品公司 Washing machines such as dishwashers or washing machines and methods of operating washing machines
AU2010281009B2 (en) * 2009-08-05 2016-04-14 Electrolux Home Products Corporation N. V. Washer such as a dishwasher or a washing machine and method for operating such a washer
US9751115B2 (en) 2009-08-05 2017-09-05 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating a washer

Also Published As

Publication number Publication date
FR2517194A1 (en) 1983-06-03
AU561252B2 (en) 1987-05-07
GR77111B (en) 1984-09-06
NO155374B (en) 1986-12-15
FI824100L (en) 1983-06-03
AU9102982A (en) 1983-06-09
EP0080948B1 (en) 1986-11-12
DE3274183D1 (en) 1987-01-02
FI74604C (en) 1988-03-10
FR2517194B1 (en) 1985-08-09
NO824029L (en) 1983-06-03
FI74604B (en) 1987-11-30
FI824100A0 (en) 1982-11-29
NO155374C (en) 1987-03-25

Similar Documents

Publication Publication Date Title
EP0080948B1 (en) Low noise dish washer with limited water consumption
FR2556952A1 (en) DISHWASHER FOR HOUSEHOLD USE
FR2618857A3 (en) Turbopump with a pumping chamber produced in a pump casing, in which is arranged a pump rotor
EP2441373B1 (en) Device for dispensing liquid products
FR2523430A3 (en) DISHWASHER WITH CIRCULATION PUMP MADE IN THE FORM OF A CENTRIFUGAL PUMP
FR2718494A1 (en) Condensate pump for a dryer.
FR2505643A1 (en) Dishwashing machine with alternate zones for washing - uses valve in pump outlet to direct water to upper or lower sprays or simultaneously to both
FR2517375A1 (en) DEVICE FOR THE INDIVIDUAL TRANSFER OF DOSE OF SEVERAL ACTIVE AGENTS THAT CAN BE PUMPS
EP0076739B1 (en) Device for pumping liquid, and apparatus fitted with such a device
FR2669207A1 (en) Dishwasher in which the motor of the pump unit is reversible
EP2441876B1 (en) Device for dispensing liquid products
EP0335452B1 (en) Washing machine with an overflow
FR2523431A3 (en) CIRCULATION PUMP FOR A HOUSEHOLD DISHWASHER
JPH0623756Y2 (en) Vertical pump
EP2584083B1 (en) Waschmaschine, die mit einer Vorrichtung zur Wasserrückführung ausgestattet ist
CN218684246U (en) Washing water circulation system and washing electric appliance with same
FR2528690A3 (en) Pump rotor and drive motor arrangement for washer - uses horizontal drain with centrifugal pump wheel mounted on vertical axis having electric motor directly above it
CN218376916U (en) Marine horizontal centrifugal pump capable of automatically injecting water
EP0548432B1 (en) Automatic lifting device for domestic waste water
JPH07204151A (en) Dishwasher
EP4012092A1 (en) Method for washing laundry, washing machine and programme implementing such a method
FR2658067A1 (en) WASHING MACHINE WITH CENTRIFUGAL WATER CIRCULATION PUMP WITH ADJUSTABLE FLOW.
FR2669208A1 (en) Dishwasher in which the motor of the pump unit is reversible
JP2685647B2 (en) Vertical pump
FR2619836A1 (en) METHOD AND DEVICE FOR DRAINING AND SUPPLYING WATER IN A WATERTIGHT DRUM

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE GB IT LI SE

17P Request for examination filed

Effective date: 19830615

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE GB IT LI SE

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3274183

Country of ref document: DE

Date of ref document: 19870102

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Free format text: ESSWEIN S.A.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19901015

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19901019

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19901022

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19911126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19911130

Ref country code: CH

Effective date: 19911130

Ref country code: BE

Effective date: 19911130

BERE Be: lapsed

Owner name: ESSWEIN S.A.

Effective date: 19911130

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 82402158.8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19961019

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19961021

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980801

EUG Se: european patent has lapsed

Ref document number: 82402158.8