EP0247918B1 - Tub with an integrated pressure chamber member - Google Patents

Tub with an integrated pressure chamber member Download PDF

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Publication number
EP0247918B1
EP0247918B1 EP87401009A EP87401009A EP0247918B1 EP 0247918 B1 EP0247918 B1 EP 0247918B1 EP 87401009 A EP87401009 A EP 87401009A EP 87401009 A EP87401009 A EP 87401009A EP 0247918 B1 EP0247918 B1 EP 0247918B1
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EP
European Patent Office
Prior art keywords
tub
tank
pressure chamber
compression chamber
chamber
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
EP87401009A
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German (de)
French (fr)
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EP0247918A1 (en
Inventor
Henri Grabarcsyk
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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Priority to AT87401009T priority Critical patent/ATE52114T1/en
Publication of EP0247918A1 publication Critical patent/EP0247918A1/en
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Publication of EP0247918B1 publication Critical patent/EP0247918B1/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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
    • D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • 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
    • D06F39/087—Water level measuring or regulating devices

Definitions

  • the present invention relates to a tank with integrated compression chamber, and in particular a molded tank made of synthetic material from a washing machine or dishwasher, provided with an integrated compression chamber.
  • a washing machine for example usually comprises a tank, a washing drum, a drum driving device, a water supply system, a device for emptying the tank, etc.
  • Water is often a controlled water level supply system.
  • the system frequently comprises a solenoid valve ensuring a supply of water to the tank of the machine, an air compression chamber converting a variation of the level of water in the tank, into a variation of air pressure, a pressure switch sensitive to the air pressure in the compression chamber, which controls the operation of this solenoid valve in cooperation with a programmer of the machine, to ensure the opening and closing of this solenoid valve, a pipe connecting the lower end of this chamber compression of air, at the lowest part of the tank of the machine, to bring the water level in this tank into contact with the volume of air in this compression chamber, and an air duct transmitting to this pressure switch the variation of air pressure in this compression chamber, and possibly a drip trap constituted by a container which collects water escaping from this compression chamber or produced by condensation and prevents it from reaching this pressure switch,
  • the air compression chamber is a separate part from the tank, and the pipe connecting the air compression chamber and the tank, is often mounted on a tubular outlet formed either in the bottom of the tank, either in the wall of a connection pipe which connects the tank to an inlet of a drain pump.
  • the manufacture and assembly of such an air compression chamber and the formation of a tubular outlet either in the bottom of the tank or in the connection pipe "tank-drain pump" are long and expensive operations which increase the cost price of known washing machines.
  • washing machines have a molded plastic tub, the drain pipe of which is paired with an integrated compression chamber, the end of which protrudes or penetrates inside the tub.
  • an integrated compression chamber one of the ends of which protrudes inside the tank and which may or may not be combined with a drainage pipe for this tank, entails a complex demolding operation which results in a loss of time. , a difficulty in the mass production of this tank, and an increase in the cost price of the latter, and therefore that of the washing machine.
  • the aim of the present invention is to avoid these drawbacks and makes it possible to produce, for washing machines or dishwashers, a tank with an integrated compression chamber, made of molded or injected synthetic material, easy to be demolded and produced in large series.
  • the invention is applicable to both a washing machine and a dishwasher.
  • a washing machine 1 according to an exemplary embodiment of the invention schematically illustrated in FIGS. 1 to 3 comprises a body 2, a tank made of synthetic material or a moldable material 3, a washing drum 4, an electric drive motor - ment 5 of the laundry drum, a drain pump 6, and a water supply system 7 which comprises an air compression chamber 8, a pressure switch 9, a solenoid valve 10, and operates in cooperation with a programmer 11 to supply water to the tank 3 at a predetermined level.
  • the other known members of lavelinge 1 are not described and illustrated, with a view to making clear the description of the invention.
  • the plastic molded or injected tank 3 having a tubular shape defining an es interior space 12 substantially cylindrical, intended to receive the laundry drum 4, is closed at one of its ends by an integrated wall 13 and covered at its other end by a removable waterproof cover 14, and provided in its upper part, d 'an access opening 15.
  • the tank 3 comprises outside its internal space 12 and in its lower zone, that is to say in the zone where the bottom 16 of the tank 3 is located, an integrated compression chamber 8 in communication with the bottom 16 by a pressure tapping opening 17, and having on the one hand, an upper part or end 18 extending outside the tank 3, above the level of this bottom 16, and provided with an air intake pipe 19, and on the other hand, a part or lower end 20 open downwards.
  • the compression chamber 8 is formed simultaneously with the plastic tank 3 during the molding of the latter.
  • the arrangement of the compression chamber 8 outside the interior space 12 of the tank 3 and open by its lower end 20, facilitates demolding of the tank 3-integrated compression chamber 8 assembly.
  • the integrated compression chamber 8 is formed near one of the ends 13, 14 of the tank 3.
  • the pressure tapping opening 17 which connects the compression chamber 8 to the bottom or bottom 16 of the tank 3 is then advantageously in a free space delimited by the washing drum 4 and the adjacent end 13 or 14 of the tank 3, where the liquid remaining in the tank 3 is not subjected to a strong disturbance created by a rotation of the laundry drum 4 or accentuated by an alternating rotation of this drum 4 in two opposite directions, and the compression chamber 8 can then translate with greater precision or better regularity, a variation in the level of liquid in the tank 3 and consequently of the liquid level in its lower part, in a variation of pressure of air trapped in its upper part, and transmit this variation of pressure to the pressure switch 9 through the air intake manifold 19.
  • the integrated compression chamber 8 comprises an open lower end 20 accessible from the outside of the tank 3 and connected by a pipe 21, to the inlet of the drain pump 6, and an upper end 18 placed in communication with the pressure switch 9 by a pipe 22 mounted on the air intake pipe 19, of diameter smaller than that of the body of the chamber 8.
  • the open lower part 20 of the compression chamber 8 performs a double function, that of a part of a compression chamber intended for receiving the liquid and that of a drain pipe from the tank 3, and the opening 17 for communication between tank 3 and chamber 8 also fulfills a double function, that of a pressure tapping opening of the compression chamber 8 and that of a liquid outlet opening of the tank 3.
  • the compression chamber 8 which is located near the integrated end wall 13 of the tank 3, has an advantage indicated in a previous paragraph that of being in communication with a space where the liquid remaining in the tank 3 is relatively calm or less disturbed by a rotation of the laundry drum 4.
  • the compression chamber 8 is independent of a drain circuit 24 of the tank 3.
  • the tank 3 in this case comprises drain pipe 25 which communicates with the bottom 16 of the tank 3 by an opening (not shown), distinct from the pressure tap opening 17 which places the bottom 16 of the tank 3 in communication with the compression chamber 8.
  • the lower part 20 of this compression chamber 8 is in this case closed in a sealed manner at its end by a part constituted either by a tight plug or by a thermostat 26 intended to measure the temperature of the liquid remaining in the tank 3, this thermostat being provided with a seal.
  • the tank 3 comprises a first of its ends hermetically closed by an integrated wall 28, and a second end provided in the plane of its rim 29, with a lateral tab 30, and closed in a leaktight manner by means of a seal 31, by a hollow cover 32 which covers the flange 29 and this tongue 30.
  • the tank 3 comprises outside its internal space 12 and in the zone where the bottom 16 of the tank 3 is located, an integrated compression chamber 35.
  • the compression chamber 35 comprises a lower part or end 36 which opens into the rim 29 of the tank 3 and forms in the lateral tab 30, an opening 37 facing the hollow of the end cover 32, and an upper part or end 38 which extends outside the tank 3 above the level d u bottom 16 of the latter and is extended by an air intake tube 39.
  • the lower end 36 of the compression chamber 35 is in communication with the hollow of this cover 32 and therefore with the interior space 12 of the tank 3, through its opening 37.
  • the opening 37 of the compression chamber 35 then acts as a pressure tapping opening. This pressure tap opening 37 is thus located in a zone of the interior space 12 of the tank 3 where the liquid staying in this tank 3 is not subjected to a strong disturbance created by a rotation of the laundry drum 4.
  • the compression chamber 35 can thus translate with good precision, a variation of the liquid level in its lower part 36, that is to say a variation of the liquid level in the tank 3, into a variation of air pressure trapped in its upper part 38 and transmit this variation in pressure to the pressure switch 9 through its air intake pipe 39 and a pipe 40 for connecting "pressure switch 9 - compression chamber 35".
  • the compression chamber 8 or 35 comprises in its upper part an air intake pipe 19 or 39 which is formed laterally on its wall instead of being coaxial with the compression chamber 8 ( Figures 2 to 4) or oriented vertically as shown in Figure 6.
  • the tubing 19 is in one piece with the body of the chamber 8.
  • the chamber 8 has a uniform section and the pressure switch pipe 45 ends in a cap 46 covering the end 18 of chamber 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Refuse Collection And Transfer (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Processing Of Solid Wastes (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Braking Systems And Boosters (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Debugging And Monitoring (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Ink Jet (AREA)

Abstract

1. A tub with an integrated pressure chamber produced by casting or injection molding, characterized in that outside its interior space (12) and in the zone comprising it bottom (16) it comprises an integrated pressure chamber (8 and 35) communicating with this bottom (16 and 34) by way of a pressure outlet orifice (17 and 37) and having on the one hand an upper part (18) located on the outside of the tub (3) above the level of this bottom (19) and on the other hand a lower part (20 and 36) open in a downward direction.

Description

La présente invention concerne une cuve à chambre intégrée de compression, et en particulier une cuve moulée en matière synthétique de lave-linge ou lave-vaisselle, munie d'une chambre intégreé de compression.The present invention relates to a tank with integrated compression chamber, and in particular a molded tank made of synthetic material from a washing machine or dishwasher, provided with an integrated compression chamber.

Un lave-linge par exemple comprend habituellement une cuve, un tambour à linge, un dispositif d'entrainement du tambour, un système d'alimentation en eau, un dispositif de vidange de la cuve, etc... Ce système d'alimentation en eau est souvent un système d'alimentation à niveau d'eau contrôlé. Le système comprend fréquemment une électrovanne assurant un approvisionnement en eau de la cuve de la machine, une chambre de compression d'air convertissant une variation du niveau d'eau dans la cuve, en une variation de pression d'air, un pressostat sensible à la pression d'air dans la chambre de compression, qui commande le fonctionnement de cette électrovanne en coopération avec un programmateur de la machine, pour assurer l'ouverture et la fermeture de cette électrovanne, une canalisation reliant l'extrémité inférieure de cette chambre de compression d'air, à une partie la plus basse de la cuve de la machine, pour mettre en contact le niveau d'eau dans cette cuve et le volume d'air dans cette chambre de compression, et une canalisation d'air transmettant à ce pressostat la variation de pression d'air dans cette chambre de compression, et éventuellement un piège-à-gouttes constitué par un récipient qui recueille de l'eau échappant de cette chambre de compression ou produite par condensation et l'empêche de parvenir à ce pressostat, car une entrée de l'eau dans le pressostat perturbe le fonctionnement normal de ce dernier.A washing machine for example usually comprises a tank, a washing drum, a drum driving device, a water supply system, a device for emptying the tank, etc. Water is often a controlled water level supply system. The system frequently comprises a solenoid valve ensuring a supply of water to the tank of the machine, an air compression chamber converting a variation of the level of water in the tank, into a variation of air pressure, a pressure switch sensitive to the air pressure in the compression chamber, which controls the operation of this solenoid valve in cooperation with a programmer of the machine, to ensure the opening and closing of this solenoid valve, a pipe connecting the lower end of this chamber compression of air, at the lowest part of the tank of the machine, to bring the water level in this tank into contact with the volume of air in this compression chamber, and an air duct transmitting to this pressure switch the variation of air pressure in this compression chamber, and possibly a drip trap constituted by a container which collects water escaping from this compression chamber or produced by condensation and prevents it from reaching this pressure switch, because an entry of water into the pressure switch disturbs the normal functioning of the latter.

Dans la plupart des lave-linge connus, la chambre de compression d'air est une pièce distincte de la cuve, et la canalisation reliant la chambre de compression d'air et la cuve, est souvent montée sur une sortie tubulaire formée soit dans le fond de la cuve, soit dans la paroi d'un tuyau de raccordement qui relie la cuve à une entrée d'une pompe de vidange. La fabrication et le montage d'une telle chambre de compression d'air et la formation d'une sortie tubulaire soit dans le fond de la cuve soit dans le tuyau de raccordement "cuve-pompe de vidange" sont des opérations longues et onéreuses qui grèvent le prix de revient des lave-linge connus.In most known washing machines, the air compression chamber is a separate part from the tank, and the pipe connecting the air compression chamber and the tank, is often mounted on a tubular outlet formed either in the bottom of the tank, either in the wall of a connection pipe which connects the tank to an inlet of a drain pump. The manufacture and assembly of such an air compression chamber and the formation of a tubular outlet either in the bottom of the tank or in the connection pipe "tank-drain pump" are long and expensive operations which increase the cost price of known washing machines.

Certains autres lave-linge connus ont une cuve en matière plastique moulée dont la tubulure de vidange est jumelée avec une chambre intégrée de compression dont l'extrémité fait saillie ou pénètre à l'intérieur de la cuve. Dans ces lave-linge l'inconvénient des opérations longues et onéreuses de fabrication et de montage d'une chambre distincte de compression, constaté et rappelé dans un paragraphe précédent, est évité. Cependant une telle chambre intégrée de compression dont l'une des extrémités fait saillie à l'intérieur de la cuve et qui est jumelée ou non avec une tubulure de vidange de cette cuve entraîne une opération complexe de démoulage qui se traduit par une perte de temps, une difficulté dans la fabrication en grande série de cette cuve, et une augmentation du prix de revient de cette dernière, et par conséquent celle du lave-linge.Certain other known washing machines have a molded plastic tub, the drain pipe of which is paired with an integrated compression chamber, the end of which protrudes or penetrates inside the tub. In these washing machines the disadvantage of long and expensive operations of manufacturing and mounting a separate compression chamber, noted and recalled in a previous paragraph, is avoided. However, such an integrated compression chamber, one of the ends of which protrudes inside the tank and which may or may not be combined with a drainage pipe for this tank, entails a complex demolding operation which results in a loss of time. , a difficulty in the mass production of this tank, and an increase in the cost price of the latter, and therefore that of the washing machine.

La présente invention ayant pour but d'éviter ces inconvénients, permet de réaliser, pour des lave- linge ou lave-vaisselle, une cuve à chambre intégrée de compression économique, en matière synthétique moulée ou injectée, facile à être démoulée et fabriquée en grande série.The aim of the present invention is to avoid these drawbacks and makes it possible to produce, for washing machines or dishwashers, a tank with an integrated compression chamber, made of molded or injected synthetic material, easy to be demolded and produced in large series.

Selon l'invention, une cuve à chambre intégrée de compression, réalisée par moulage ou injection, est caractérisée en ce qu'elle comprend à l'extérieur de son espace intérieur et dans la zone comportant son fond, une chambre intégrée de compression communiquant avec ce fond par une ouverture de prise de pression, et ayant d'une part une partie supérieure s'étendant à l'extérieur de la cuve, au dessus du niveau de ce fond et munie d'une tubulure de prise d'air, et d'autre part une partie inférieure ouverte vers le bas. Pour mieux faire comprendre l'invention on en décrit ci-après un certain nombre d'exemples de réalisation illustrés par des dessins ci-annexés dont :

  • - la figure 1 représente une vue partielle schématique d'une machine à laver munie d'une cuve en matière synthétique moulée ou injectée réalisée selon l'invention,
  • - la figure 2 représente à une autre échelle, une vue frontale schématique partielle de la cuve de la figure 1,
  • - la figure 3 représente à une autre échelle, une vue schématique, partielle, en coupe tranversale suivant le plan III-III de la cuve de la figure 2,
  • - la figure 3a est un schéma d'une variante d'une partie de la cuve de la figure 3,
  • - la figure 4 représente à une autre échelle, une vue frontale schématique partielle d'une première variante de réalisation de la cuve de la figure 2,
  • - la figure 5 représente à une autre échelle, une vue en perspective, schématique partielle d'une deuxième variante de réalisation de la cuve de la figure 2, montrant la cuve dont le couvercle est enlevé, et
  • - la figure 6 représente à une autre échelle, une vue frontale schématique partielle de la cuve de la figure 5 montrant la cuve munie de son couvercle.
According to the invention, a tank with integrated compression chamber, produced by molding or injection, is characterized in that it comprises, outside its internal space and in the zone comprising its bottom, an integrated compression chamber communicating with this bottom by a pressure tapping opening, and having on the one hand an upper part extending outside the tank, above the level of this bottom and provided with an air intake pipe, and on the other hand a lower part open towards the bottom. To better understand the invention, a certain number of embodiments are described below, illustrated by the appended drawings, including:
  • FIG. 1 represents a schematic partial view of a washing machine provided with a molded or injected plastic tank produced according to the invention,
  • FIG. 2 represents, on another scale, a partial schematic front view of the tank of FIG. 1,
  • FIG. 3 represents, on another scale, a schematic, partial view, in transverse section along the plane III-III of the tank of FIG. 2,
  • FIG. 3a is a diagram of a variant of part of the tank of FIG. 3,
  • FIG. 4 represents, on another scale, a partial schematic front view of a first alternative embodiment of the tank of FIG. 2,
  • FIG. 5 represents, on another scale, a perspective view, partial schematic of a second alternative embodiment of the tank of FIG. 2, showing the tank from which the cover is removed, and
  • - Figure 6 shows on another scale, a partial schematic front view of the tank of Figure 5 showing the tank with its cover.

L'invention est applicable aussi bien à un lave-linge qu'à un lave-vaisselle.The invention is applicable to both a washing machine and a dishwasher.

Un lave-linge 1 selon un exemple de réalisation de l'invention schématiquement illustré dans les figures 1 à 3 comprend une carrosserie 2, une cuve en matière synthétique ou une matière moulable 3, un tambour à linge 4, un moteur électrique d'entraine- ment 5 du tambour à linge, une pompe de vidange 6, et un système d'alimentation en eau 7 qui comporte une chambre de compression d'air 8, un pressostat 9, une électrovanne 10, et fonctionne en coopération avec un programmateur 11 pour alimenter en eau la cuve 3 à un niveau prédéterminé. Les autres organes connus du lavelinge 1 ne sont pas décrits et illustrés, en vue de rendre clair l'exposé de l'invention.A washing machine 1 according to an exemplary embodiment of the invention schematically illustrated in FIGS. 1 to 3 comprises a body 2, a tank made of synthetic material or a moldable material 3, a washing drum 4, an electric drive motor - ment 5 of the laundry drum, a drain pump 6, and a water supply system 7 which comprises an air compression chamber 8, a pressure switch 9, a solenoid valve 10, and operates in cooperation with a programmer 11 to supply water to the tank 3 at a predetermined level. The other known members of lavelinge 1 are not described and illustrated, with a view to making clear the description of the invention.

La cuve en matière synthétique moulée ou injectée 3, ayant une forme tubulaire définissant un espace intérieur 12 sensiblement cylindrique, destiné à recevoir le tambour à linge 4, est fermée à l'une de ses extrémités par une paroi intégrée 13 et couverte à son autre extrémité par un couvercle étanche amovible 14, et munie dans sa partie supérieure, d'une ouverture d'accès 15.The plastic molded or injected tank 3, having a tubular shape defining an es interior space 12 substantially cylindrical, intended to receive the laundry drum 4, is closed at one of its ends by an integrated wall 13 and covered at its other end by a removable waterproof cover 14, and provided in its upper part, d 'an access opening 15.

Selon une caractéristique importante, la cuve 3 comprend à l'extérieur de son espace intérieur 12 et dans sa zone inférieure c'est-à-dire dans la zone où se trouve le fond 16 de la cuve 3, une chambre intégrée de compression 8 en communication avec le fond 16 par une ouverture de prise de pression 17, et ayant d'une part, une partie ou extrémité supérieure 18 s'étendant à l'extérieur de la cuve 3, au-dessus du niveau de ce fond 16, et munie d'une tubulure de prise d'air 19, et d'autre part, une partie ou extrémité inférieure 20 ouverte vers le bas. La chambre de compression 8 est formée simultanément avec la cuve en matière synthétique 3 lors du moulage de cette dernière. La disposition de la chambre de compression 8 à l'extérieur de l'espace intérieur 12 de la cuve 3 et ouverte par son extrémité inférieure 20, facilite le démoulage de l'ensemble cuve 3-chambre intégrée de compression 8.According to an important characteristic, the tank 3 comprises outside its internal space 12 and in its lower zone, that is to say in the zone where the bottom 16 of the tank 3 is located, an integrated compression chamber 8 in communication with the bottom 16 by a pressure tapping opening 17, and having on the one hand, an upper part or end 18 extending outside the tank 3, above the level of this bottom 16, and provided with an air intake pipe 19, and on the other hand, a part or lower end 20 open downwards. The compression chamber 8 is formed simultaneously with the plastic tank 3 during the molding of the latter. The arrangement of the compression chamber 8 outside the interior space 12 of the tank 3 and open by its lower end 20, facilitates demolding of the tank 3-integrated compression chamber 8 assembly.

Selon une autre caractéristique, la chambre intégrée de compression 8 est formée à proximité de l'une des extrémités 13, 14 de la cuve 3. L'ouverture de prise de pression 17 qui relie la chambre de compression 8 à la partie inférieure ou fond 16 de la cuve 3 se trouve alors avantageusement dans un espace libre délimité par le tambour à linge 4 et l'extrémité adjacente 13 ou 14 de la cuve 3, où le liquide séjournant dans la cuve 3 n'est pas soumis à une forte perturbation créée par une rotation du tambour à linge 4 ou accentuée par une rotation alternée de ce tambour 4 dans deux sens opposés, et la chambre de compression 8 peut alors traduire avec une plus grande précision ou une meilleure régularité, une variation du niveau de liquide dans la cuve 3 et par conséquent du niveau de liquide dans sa partie inférieure, en une variation de pression d'air emprisonné dans sa partie supérieure, et transmettre cette variation de pression au pressostat 9 à travers la tubulure de prise d'air 19.According to another characteristic, the integrated compression chamber 8 is formed near one of the ends 13, 14 of the tank 3. The pressure tapping opening 17 which connects the compression chamber 8 to the bottom or bottom 16 of the tank 3 is then advantageously in a free space delimited by the washing drum 4 and the adjacent end 13 or 14 of the tank 3, where the liquid remaining in the tank 3 is not subjected to a strong disturbance created by a rotation of the laundry drum 4 or accentuated by an alternating rotation of this drum 4 in two opposite directions, and the compression chamber 8 can then translate with greater precision or better regularity, a variation in the level of liquid in the tank 3 and consequently of the liquid level in its lower part, in a variation of pressure of air trapped in its upper part, and transmit this variation of pressure to the pressure switch 9 through the air intake manifold 19.

Dans l'exemple illustré à la figure 2, la chambre intégrée de compression 8 comprend une extrémité inférieure ouverte 20 accessible de l'extérieur de la cuve 3 et reliée par un tuyau 21, à l'entrée de la pompe de vidange 6, et une extrémité supérieure 18 mise en communication avec le pressostat 9 par un tuyau 22 monté sur la tubulure de prise d'air 19, de diamètre inférieur à celui du corps de la chambre 8.In the example illustrated in FIG. 2, the integrated compression chamber 8 comprises an open lower end 20 accessible from the outside of the tank 3 and connected by a pipe 21, to the inlet of the drain pump 6, and an upper end 18 placed in communication with the pressure switch 9 by a pipe 22 mounted on the air intake pipe 19, of diameter smaller than that of the body of the chamber 8.

Dans cet exemple, la partie inférieure ouverte 20 de la chambre de compression 8 accomplit une double fonction celle d'une partie d'une chambre de compression destinée à la réception du liquide et celle d'une tubulure de vidange de la cuve 3, et l'ouverture 17 de communication entre cuve 3 et chambre 8 remplit une double fonction également, celle d'une ouverture de prise de pression de la chambre de compression 8 et celle d'une ouverture de sortie de liquide de la cuve 3.In this example, the open lower part 20 of the compression chamber 8 performs a double function, that of a part of a compression chamber intended for receiving the liquid and that of a drain pipe from the tank 3, and the opening 17 for communication between tank 3 and chamber 8 also fulfills a double function, that of a pressure tapping opening of the compression chamber 8 and that of a liquid outlet opening of the tank 3.

Dans cet exemple, la chambre de compression 8 qui se trouve à proximité de la paroi intégrée d'extrémité 13 de la cuve 3, bénéficie d'un avantage indiqué dans un paragraphe précédent celui d'être en communication avec un espace où le liquide séjournant dans la cuve 3 est relativement calme ou moins perturbé par une rotation du tambour à linge 4.In this example, the compression chamber 8 which is located near the integrated end wall 13 of the tank 3, has an advantage indicated in a previous paragraph that of being in communication with a space where the liquid remaining in the tank 3 is relatively calm or less disturbed by a rotation of the laundry drum 4.

Dans une première variante de réalisation schématiquement illustrée dans la figure 4, la chambre de compression 8 est indépendante d'un circuit de vidange 24 de la cuve 3. La cuve 3 comprend dans ce cas tubulure de vidange 25 qui communique avec le fond 16 de la cuve 3 par une ouverture non représentée, distincte de l'ouverture de prise de pression 17 qui met en communication le fond 16 de la cuve 3 avec la chambre de compression 8. La partie inférieure 20 de cette chambre de compression 8 est dans ce cas fermée d'une manière étanche à son extrémité par une pièce constituée soit par un bouchon étanche soit par un thermostat 26 destiné à mesurer la température du liquide séjournant dans la cuve 3, ce thermostat étant muni d'un joint d'étanchéité.In a first embodiment schematically illustrated in FIG. 4, the compression chamber 8 is independent of a drain circuit 24 of the tank 3. The tank 3 in this case comprises drain pipe 25 which communicates with the bottom 16 of the tank 3 by an opening (not shown), distinct from the pressure tap opening 17 which places the bottom 16 of the tank 3 in communication with the compression chamber 8. The lower part 20 of this compression chamber 8 is in this case closed in a sealed manner at its end by a part constituted either by a tight plug or by a thermostat 26 intended to measure the temperature of the liquid remaining in the tank 3, this thermostat being provided with a seal.

Dans une deuxième variante de réalisation de l'invention illustrée dans les figures 5 et 6, la cuve 3 comprend une première de ses extrémités hermétiquement fermée par une paroi intégrée 28, et une deuxième extrémité munie dans le plan de son rebord 29, d'une languette latérale 30, et fermée d'une manière étanche par l'intermédiaire d'un joint d'étanchéité 31, par un couvercle creux 32 qui recouvre le rebord 29 et cette languette 30. Dans cette deuxième variante de réalisation, la cuve 3 comprend à l'extérieur de son espace intérieur 12 et dans la zone où se trouve le fond 16 de la cuve 3, une chambre intégrée de compression 35. La chambre de compression 35 comprend une partie ou extrémité inférieure 36 qui débouche dans le rebord 29 de la cuve 3 et forme dans la languette latérale 30, une ouverture 37 face au creux du couvercle d'extrémité 32, et une partie ou extrémité supérieure 38 qui s'étend à l'extérieur de la cuve 3 au-dessus du niveau du fond 16 de cette dernière et se prolonge par une tubulure de prise d'air 39. Lors de la fermeture de la cuve 3 par le couvercle creux 32, l'extrémité inférieure 36 de la chambre de compression 35 est en communication avec le creux de ce couvercle 32 et par conséquent avec l'espace intérieur 12 de la cuve 3, par son ouverture 37. L'ouverture 37 de la chambre de compression 35 joue alors le rôle d'une ouverture de prise de pression. Cette ouverture de prise de pression 37 se trouve ainsi dans une zone de l'espace intérieur 12 de la cuve 3 où le liquide séjournant dans cette cuve 3 n'est pas soumis à une forte perturbation créée par une rotation du tambour à linge 4. La chambre de compression 35 peut traduire ainsi avec une bonne précision, une variation du niveau de liquide dans sa partie inférieure 36 c'est-à-dire une variation du niveau de liquide dans la cuve 3, en une variation de pression d'air emprisonné dans sa partie supérieure 38 et transmettre cette variation de pression au pressostat 9 à travers sa tubulure de prise d'air 39 et un tuyau 40 de liaison "pressostat 9 - chambre de compression 35".In a second alternative embodiment of the invention illustrated in FIGS. 5 and 6, the tank 3 comprises a first of its ends hermetically closed by an integrated wall 28, and a second end provided in the plane of its rim 29, with a lateral tab 30, and closed in a leaktight manner by means of a seal 31, by a hollow cover 32 which covers the flange 29 and this tongue 30. In this second variant embodiment, the tank 3 comprises outside its internal space 12 and in the zone where the bottom 16 of the tank 3 is located, an integrated compression chamber 35. The compression chamber 35 comprises a lower part or end 36 which opens into the rim 29 of the tank 3 and forms in the lateral tab 30, an opening 37 facing the hollow of the end cover 32, and an upper part or end 38 which extends outside the tank 3 above the level d u bottom 16 of the latter and is extended by an air intake tube 39. When the tank 3 is closed by the hollow cover 32, the lower end 36 of the compression chamber 35 is in communication with the hollow of this cover 32 and therefore with the interior space 12 of the tank 3, through its opening 37. The opening 37 of the compression chamber 35 then acts as a pressure tapping opening. This pressure tap opening 37 is thus located in a zone of the interior space 12 of the tank 3 where the liquid staying in this tank 3 is not subjected to a strong disturbance created by a rotation of the laundry drum 4. The compression chamber 35 can thus translate with good precision, a variation of the liquid level in its lower part 36, that is to say a variation of the liquid level in the tank 3, into a variation of air pressure trapped in its upper part 38 and transmit this variation in pressure to the pressure switch 9 through its air intake pipe 39 and a pipe 40 for connecting "pressure switch 9 - compression chamber 35".

Une telle disposition de la chambre de compression 35 à l'extérieur de la cuve 3, et ouverte vers le bas, facilite le démoulage de l'ensemble cuve 3 - chambre intégrée de compression 35, de la même manière que celle de la chambre de compresion 8 des exemples précédents.Such an arrangement of the compression chamber 35 outside the tank 3, and open downwards, facilitates the demolding of the tank 3 assembly - integrated compression chamber 35, in the same way as that of the compression chamber 8 of the previous examples.

Dans une autre variante de réalisation non représentée la chambre de compression 8 ou 35 comprend dans sa partie supérieure une tubulure de prise d'air 19 ou 39 qui est formée latéralement à sa paroi au lieu d'être coaxiale à la chambre de compression 8 (figures 2 à 4) ou orientée verticalement comme le montre la figure 6.In another variant not shown, the compression chamber 8 or 35 comprises in its upper part an air intake pipe 19 or 39 which is formed laterally on its wall instead of being coaxial with the compression chamber 8 ( Figures 2 to 4) or oriented vertically as shown in Figure 6.

Dans les exemples la tubulure 19 est d'un seul tenant avec le corps de la chambre 8. Dans une variante (figure 3a), pour faciliter le moulage, la chambre 8 a une section uniforme et le tuyau 45 de pressostat se termine par un capuchon 46 coiffant l'extrémité 18 de la chambre 8.In the examples, the tubing 19 is in one piece with the body of the chamber 8. In a variant (FIG. 3a), to facilitate molding, the chamber 8 has a uniform section and the pressure switch pipe 45 ends in a cap 46 covering the end 18 of chamber 8.

Claims (8)

1. A tub with an integrated pressure chamber produced by casting or injection molding, characterized in that outside its interior space (12) and in the zone comprising it bottom (16) it comprises an integrated pressure chamber (8 and 35) communicating with this bottom (16 and 34) by way of a pressure outlet orifice (17 and 37) and having on the one hand an upper part (18) located on the outside of the tub (3) above the level of this bottom (19) and on the other hand a lower part (20 and 36) open in a downward direction.
2. The tub as claimed in claim 1, characterized in that the integrated pressure chamber (8 and 35) is formed within the proximity of one of the ends (13, 14, 28 and 29 through 32) of the tub (3).
3. The tub as claimed in claim 1 and in claim 2, characterized in that the open lower part (20) of the pressure chamber (35) opens into the hollow of an end cover (32) of the tub (3).
4. The tub as claimed in claim 1 or claim 2, characterized in that in the pressure chamber (8), the communication opening (17) between the tub (3) and the chamber (8) fulfills the twin functions of being a pressure outlet orifice and of being an orifice for the outlet of liquid from the tub (3), whereas the lower open part (20) fulfills the twin functions of being a part of the pressure chamber intended for receiving the liquid from a pressure chamber and that of an emptying tube for the tub (3).
5. The tub as claimed in claim 1 and claim 2, characterized in that the pressure chamber (8) is independent of the emptying circuit (24) of the tub (3).
6. The tub as claimed in claim 5, characterized in that in the pressure chamber (8) the lower part (20) of the same is shut off at its end by a thermostat (26) having a sealing joint.
7. The tub as claimed in claim 3, characterized in that in a lug (30) of an end rim (29) of the tub the lower part (36) of the pressure chamber (35) forms an orifice (37) opposite to the concavity of the end cover (32) of the tub (3).
8. The tub as claimed in claim 1, characterized in that in the pressure chamber (8 and 35) the air tube (19 and 39) is performed laterally to the wall of this chamber (8 and 35).
EP87401009A 1986-05-27 1987-04-30 Tub with an integrated pressure chamber member Expired - Lifetime EP0247918B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87401009T ATE52114T1 (en) 1986-05-27 1987-04-30 VESSEL WITH AN INTEGRATED PRESSURE CHAMBER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8607580 1986-05-27
FR8607580A FR2599394B1 (en) 1986-05-27 1986-05-27 INTEGRATED COMPRESSION CHAMBER TANK

Publications (2)

Publication Number Publication Date
EP0247918A1 EP0247918A1 (en) 1987-12-02
EP0247918B1 true EP0247918B1 (en) 1990-04-18

Family

ID=9335693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401009A Expired - Lifetime EP0247918B1 (en) 1986-05-27 1987-04-30 Tub with an integrated pressure chamber member

Country Status (7)

Country Link
EP (1) EP0247918B1 (en)
AT (1) ATE52114T1 (en)
DE (1) DE3762357D1 (en)
ES (1) ES2015307B3 (en)
FR (1) FR2599394B1 (en)
GR (1) GR3000604T3 (en)
IN (1) IN170943B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004057942B3 (en) * 2004-11-30 2005-12-08 Miele & Cie. Kg A plastic wash tank for a domestic washing machine has a water level chamber in the front plate having two parts joined by an integral hinge
DE102004057943B3 (en) * 2004-11-30 2005-12-08 Miele & Cie. Kg The plastic wash tank of a domestic washing machine has a front panel with an integrally moulded water level pressure chamber
EP1662035A1 (en) 2004-11-30 2006-05-31 Miele & Cie. KG Plastic tub with air trap for a washing machine

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19646440C2 (en) * 1996-11-11 2003-04-10 Bsh Bosch Siemens Hausgeraete Plastic tub for a household washing machine
IT1308702B1 (en) * 1999-02-16 2002-01-10 Iar Siltal Spa WASHING MACHINE
FR2828503B1 (en) * 2001-08-08 2003-10-31 Georges Mathias Martinez WASHING AND SPINNING MACHINE WITH CONCEPT OF RECYCLING WATER TANK
WO2008052980A1 (en) * 2006-10-31 2008-05-08 Arcelik Anonim Sirketi A washing machine
WO2008052979A1 (en) * 2006-10-31 2008-05-08 Arcelik Anonim Sirketi A washing machine
DE202007003085U1 (en) * 2007-03-02 2007-05-24 BSH Bosch und Siemens Hausgeräte GmbH Plastic moulded outer drum for a horizontal axis front loading washing machine has a horizontal outlet in the lower region directed to the side into which the pressure chamber is fitted
JP6074690B2 (en) * 2011-02-23 2017-02-08 パナソニックＩｐマネジメント株式会社 Drum washing machine
EP2746450A1 (en) * 2012-12-21 2014-06-25 Electrolux Home Products Corporation N.V. Laundry washing machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1503759A1 (en) * 1965-10-14 1969-04-17 Constructa Werke Gmbh Dishwasher
US4066094A (en) * 1976-03-17 1978-01-03 General Electric Company Combination drain sump and air pressure chamber for automatic clothes washing machine
FR2537174A1 (en) * 1982-12-06 1984-06-08 Amiens Const Elect Mec WASHING MACHINE WITH DRAIN PIPE OPENING AT THE BOTTOM OF THE TANK

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004057942B3 (en) * 2004-11-30 2005-12-08 Miele & Cie. Kg A plastic wash tank for a domestic washing machine has a water level chamber in the front plate having two parts joined by an integral hinge
DE102004057943B3 (en) * 2004-11-30 2005-12-08 Miele & Cie. Kg The plastic wash tank of a domestic washing machine has a front panel with an integrally moulded water level pressure chamber
EP1662035A1 (en) 2004-11-30 2006-05-31 Miele & Cie. KG Plastic tub with air trap for a washing machine

Also Published As

Publication number Publication date
EP0247918A1 (en) 1987-12-02
FR2599394B1 (en) 1988-07-29
GR3000604T3 (en) 1991-09-27
IN170943B (en) 1992-06-20
ES2015307B3 (en) 1990-08-16
FR2599394A1 (en) 1987-12-04
ATE52114T1 (en) 1990-05-15
DE3762357D1 (en) 1990-05-23

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