EP1145680B1 - Dispositif pour parer aux effets de variations de pression dans une cuve de lave-vaisselle - Google Patents
Dispositif pour parer aux effets de variations de pression dans une cuve de lave-vaisselle Download PDFInfo
- Publication number
- EP1145680B1 EP1145680B1 EP20010400716 EP01400716A EP1145680B1 EP 1145680 B1 EP1145680 B1 EP 1145680B1 EP 20010400716 EP20010400716 EP 20010400716 EP 01400716 A EP01400716 A EP 01400716A EP 1145680 B1 EP1145680 B1 EP 1145680B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- opening
- valve
- closing means
- openings
- 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
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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
- A47L15/4251—Details of the casing
Definitions
- the invention relates to a device for countering the effects of pressure variations in a dishwasher tank.
- the supply of air at room temperature in the hot enclosure of the tank can cause an overpressure of the tank of the dishwasher. This is the case for example during the momentary opening by a user of the dishwasher door during a cycle of operation corresponding to a heating cycle. Overpressure can cause a malfunction of the device, such as for example unwanted door opening, overflowing water and sometimes even the ensuing anti-overflow security.
- the supply of cold water to a hot enclosure at the time of rinsing for example, causes a depression of the tank which can cause a deformation of it.
- venting To counter the effects of pressure variations, most devices today are equipped with a vent to the tank, usually formed by a simple pipe connecting the inside and outside of the tank and allowing air circulation in case of overpressure or depression.
- a dishwasher equipped with a vent of the tank is described in the document US 3,023,757.
- the disadvantage of this venting is that it lets the water vapor, especially during heating cycles. When the bet air flows out of the dishwasher, the steam, condensing on walls or adjacent furniture, may cause deterioration.
- the venting opens into the space between the tank and a dishwasher cover sheets, and water vapor, condensing, risk of damaging the parts located in this space, such as the felt-tip pens insulation for example.
- a solution then consists in closing the hole opening at the outlet. airing by a foam which lets air pass but which is waterproof with steam. However, in use, the foams become clogged and, if they are too fine, may saturate with water vapor, thus forming a plug which does not allow enough air to pass through.
- Another solution consists of closing the through hole with a shutter, free to rotate around of a horizontal axis. But it’s never vapor tight, even during normal dishwasher operation.
- a third solution effective but expensive, consists in setting up a circuit of condensation with condensate collector and evaporator.
- the device according to the invention offers a simple and economical to counter the effects of overpressure and depression of the tank of a dishwasher, while maintaining a good seal against water vapor during the normal operating cycle.
- the invention proposes a device comprising a venting with two openings, closed by separate closing means.
- the invention relates to a device for countering pressure variations in a dishwasher tank, characterized in that it includes a venting of the tank with two openings of exit, first means for closing the first of said openings, substantially vapor-tight, opening only towards the outside of the tank to let out air in the event of overpressure, and second means for closing the second of said openings, appreciably impervious to water vapor, opening only towards the inside of the tank to let in air in case of depression.
- the second outlet opening is made in the first closing means, said first means supporting the second closing means, thus making it possible to reduce the bulk of the vent.
- FIG. 1 shows an embodiment of the device according to the invention.
- the device comprises a venting of the tank with two outlet openings.
- First means of closure close the first of said openings and open only to the outside from the tank, to let out air in the event of overpressure.
- Seconds closing means close the second of said openings and do not open towards the inside of the tank to let in air in case of depression.
- the first and second closing means separate from one of the other and substantially waterproof against water vapor when closed, give the device its tightness during normal operation of the dishwasher.
- the venting of the tank is ensured by one or two piece (s) outside the tank, with a through hole on the tank and at least one hole emerging at the outlet to form at least one of the two openings.
- the openings are made directly in the tank, the water pressure during the washing or rinsing cycles may cause water leakage.
- a solution preferential consists in using only a part external to the tank for perform the venting, as is the case for example in Figure 1.
- FIG. 1 constitutes an exemplary embodiment of the device according to the invention which makes it possible to limit its size, which is a constant concern in the field of household appliances.
- the Figure 1 device comprises an outer part 1. This is for example a part integrated in the dishwasher distributor, generally located in the free space between the tank and one of the dishwasher cover sheets. The distributor is used to regulate the amount of regenerating salt in rinse water. Neither the tank nor the hole leading to the tank are shown here.
- the external part 1 in this example comprises only one hole 2 opening at the outlet.
- the device shown in Figure 1 includes in addition to an intermediate part 3, in which an opening 4 is pierced forming the first of said openings, a valve 5 forming the first means for closing said first opening, an opening 6 pierced in the valve 5 and forming said second opening, a valve 7 forming the second means for closing said second opening.
- Intermediate piece 3 serves as an adaptation piece on hole 2 opening at the outlet, which can be a pre-existing hole in a part designed to other purposes, as is the case for the dispatcher.
- the intermediate piece has in this example another function which is that of support for the valve 5 forming the first closing means.
- the part 3 forming a support is pierced with the opening 4 forming the first opening, and whose dimensions are smaller than those of the valve 5. In closed position, the valve 5 is therefore in contact with the part 3, which gives a good seal against water vapor.
- the valve 5 is articulated in rotation on the part. support 3, around an axis 51, so that it can only open towards the outside of the tank in the event of overpressure (direction symbolized by arrow A in figure 1), i.e. towards the free space where the air is under pressure room. On the contrary, in the event of depression, it is pressed against the part support 3.
- the articulation is for example ensured by a hinge free, ie with little friction, and the support part 3 is substantially vertical.
- the valve 5 is made of a material of low density, for example a plastic material of the polypropylene type. So at the less overpressure in the tank, the valve 5, light, is already raised.
- a system of springs for example, can be considered to recall the valve in its position of contact with the support, in particular in the case where the support would not be vertical.
- the stiffness of the spring is then determined as a function overpressures in play in the dishwasher. But this solution turns out much more complex.
- Any type of valve can be considered at the place of the valve, but again, the solutions may be more complicated to implement.
- the second outlet opening is carried out in the first means for closing the first opening, that is to say in the form of an opening 6 in the valve 5 itself.
- the valve 5 then constitutes a support for the second closing means, formed in this example of a second valve 7, smaller than the first valve 5, and whose dimensions are slightly larger than those of the opening 6 in order to ensure good contact with the first valve 5 forming the support of the second valve 7.
- the valve 7 is impermeable to water vapor relative to the valve 5 forming a support.
- the second valve 7 is also movable in rotation on its support formed by the valve 5, around an axis 71, the joint also being formed of a free hinge. But this time, the valve 7 can only open towards the inside of the tank, the direction being symbolized by arrow B in Figure 1, i.e. in the opposite direction to that of the valve 5.
- the valve 7 opens, which allows let the air from the free space inside the tank and prepare for the depression.
- the valve 7 is pressed against the valve 5 which constitutes its support, and valve 5, on the other hand, is lifted from the support piece 3.
- the first closing means (valve 5) which support the second closing means (valve 7).
- the overpressure effects are generally of greater amplitude and it is preferable that it is the first outlet opening, which makes it possible to counter the overpressure, which is of larger dimensions than the second outlet opening, making it possible to ward off depression.
- openings (4, 6) with the largest possible surface. Indeed, as the valves are light, they can be lifted as soon as there is a small variation in pressure and the large surface allows to deal with large variations in pressure.
- these openings must be sized according to the orders of magnitude of the expected pressure variations. Thus, it is not necessary for these surfaces to exceed 15 to 20 cm 2 since the pressure variations in the dishwashers remain moderate.
- the opening 4 is approximately 6 cm 2 and the opening 6 is approximately 3 cm 2 .
Landscapes
- Washing And Drying Of Tableware (AREA)
Description
Claims (9)
- Dispositif pour parer aux variations de pression dans une cuve de lave-vaisselle, caractérisé en ce qu'il comporte une mise à l'air libre de la cuve avec deux ouvertures de sortie (4,6), des premiers moyens de fermeture (5) de la première desdites ouvertures (4), sensiblement étanches à la vapeur d'eau, ne s'ouvrant que vers l'extérieur de la cuve pour laisser sortir de l'air en cas de surpression, et des seconds moyens de fermeture (7) de la seconde desdites ouvertures (6), sensiblement étanches à la vapeur d'eau, ne s'ouvrant que vers l'intérieur de la cuve pour laisser rentrer de l'air en cas de dépression.
- Dispositif selon la revendication 1, caractérisé en ce que la seconde ouverture de sortie (6) est faite dans les premiers moyens de fermeture (5), lesdits premiers moyens supportant les seconds moyens de fermeture (7).
- Dispositif selon l'une des revendications précédentes, caractérisé en ce que lesdits premiers et seconds moyens de fermeture sont formés chacun d'un clapet articulé en rotation autour d'un axe (51, 71), ne pouvant s'ouvrir respectivement que vers l'extérieur et vers l'intérieur de la cuve.
- Dispositif selon la revendication 3, caractérisé en ce que chaque clapet est monté sur un support percé de l'ouverture correspondante, les dimensions du clapet étant sensiblement supérieures à celles de l'ouverture afin d'assurer le contact et l'étanchéité à la vapeur d'eau.
- Dispositif selon la revendication 4, caractérisé en ce que lesdits supports sont sensiblement verticaux et en ce que chacune des articulations est assurée par une charnière libre montée sur chacun desdits supports, le poids de chacun des clapets étant alors suffisant pour assurer la fermeture de chacune desdites ouvertures.
- Dispositif selon la revendication 5, caractérisé en ce que les clapets sont réalisés en matière plastique de faible densité, de type polypropylène.
- Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comporte au moins une pièce extérieure (1) à la cuve pour former la mise à l'air libre, ladite pièce comportant un trou débouchant sur la cuve et au moins un trou débouchant en sortie (2) pour former au moins une des deux ouvertures.
- Dispositif selon la revendication 7, caractérisé en ce que qu'il comporte une seule pièce extérieure, en ce que ladite pièce ne comprend qu'un seul trou débouchant en sortie et en ce que le dispositif comprend une pièce intermédiaire (3) adaptée au trou débouchant en sortie, formant un support dans lequel est percée la première ouverture fermée par lesdits premiers moyens de fermeture, lesdits moyens formant un support dans lequel est percée la seconde ouverture fermée par lesdits seconds moyens de fermeture.
- Dispositif selon la revendication 8, caractérisé en ce que le lave-vaisselle comprenant un répartiteur positionné entre la cuve et une des tôles d'habillage, ladite pièce extérieure est intégrée dans ledit répartiteur.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0003600A FR2806608B1 (fr) | 2000-03-21 | 2000-03-21 | Dispositif pour parer aux effets de variations de pression dans une cuve de lave-vaisselle |
FR0003600 | 2000-03-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1145680A1 EP1145680A1 (fr) | 2001-10-17 |
EP1145680B1 true EP1145680B1 (fr) | 2004-06-02 |
Family
ID=8848337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20010400716 Expired - Lifetime EP1145680B1 (fr) | 2000-03-21 | 2001-03-20 | Dispositif pour parer aux effets de variations de pression dans une cuve de lave-vaisselle |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1145680B1 (fr) |
DE (1) | DE60103586T2 (fr) |
ES (1) | ES2220684T3 (fr) |
FR (1) | FR2806608B1 (fr) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3023757A (en) * | 1960-05-06 | 1962-03-06 | Westinghouse Electric Corp | Dishwashing apparatus |
US3387388A (en) * | 1965-12-17 | 1968-06-11 | Westinghouse Electric Corp | Single vent system for dishwasher |
CH472208A (de) * | 1967-09-01 | 1969-05-15 | Bosch Hausgeraete Gmbh | Geschirrspülmaschine mit Entlüftungsöffnung |
SE346689B (fr) * | 1970-10-28 | 1972-07-17 | Electrolux Ab |
-
2000
- 2000-03-21 FR FR0003600A patent/FR2806608B1/fr not_active Expired - Fee Related
-
2001
- 2001-03-20 ES ES01400716T patent/ES2220684T3/es not_active Expired - Lifetime
- 2001-03-20 DE DE2001603586 patent/DE60103586T2/de not_active Expired - Fee Related
- 2001-03-20 EP EP20010400716 patent/EP1145680B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE60103586T2 (de) | 2005-07-07 |
FR2806608B1 (fr) | 2002-06-28 |
EP1145680A1 (fr) | 2001-10-17 |
ES2220684T3 (es) | 2004-12-16 |
FR2806608A1 (fr) | 2001-09-28 |
DE60103586D1 (de) | 2004-07-08 |
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