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WO1997034681A1 - Self-cleaning filter for liquids - Google Patents

Self-cleaning filter for liquids Download PDF

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Publication number
WO1997034681A1
WO1997034681A1 PCT/FR1997/000466 FR9700466W WO9734681A1 WO 1997034681 A1 WO1997034681 A1 WO 1997034681A1 FR 9700466 W FR9700466 W FR 9700466W WO 9734681 A1 WO9734681 A1 WO 9734681A1
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WO
WIPO (PCT)
Prior art keywords
filter
bell
filter element
self
enclosure
Prior art date
Application number
PCT/FR1997/000466
Other languages
French (fr)
Inventor
Sebastien Jouet
Original Assignee
Sebastien Jouet
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 Sebastien Jouet filed Critical Sebastien Jouet
Publication of WO1997034681A1 publication Critical patent/WO1997034681A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/908—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding provoking a tangential stream

Definitions

  • the present invention relates to a self-cleaning filter for liquid.
  • Most swimming pool water treatment installations include a very large sand filter which must be periodically regenerated by backwashing by actuating a multi-way valve. Despite this periodic operation, the filter degrades after a prolonged period of use and requires the replacement of the sand, which is generally carried out by a specialist during a relatively expensive intervention.
  • Some swimming pools are fitted with a cartridge filter with a smaller footprint, but requiring very restrictive manual washing of the filter element.
  • the device according to the present invention eliminates all these drawbacks. Indeed, it makes it possible to produce filters, in particular for swimming pools, of an extremely small size, of an excellent yield, the manufacturing cost of the filter element is very low and eliminating any manual cleaning intervention. Its use makes it possible to create a very compact water treatment station that does not require a technical room.
  • It consists of an enclosure divided, by a flat filtering element, into a downstream zone connected to the outlet pipe, and an upstream zone comprising a conical diffuser and a bell with flared outlet, connected to the liquid inlet pipe to treat, and disposed at a short distance from the filter element, the assembly being determined to impose on the liquid, at the outlet of the bell, a centrifugal flow projecting the particles in suspension in an annular chamber situated between the bell and the internal wall from the enclosure, then from there to the upstream area intended to collect them, the cleaning of the latter being carried out by means of a purge located at the lower part of the enclosure.
  • FIG. 1 shows in axial longitudinal section a self-cleaning filter of cylindrical shape
  • FIG. 2 is an enlargement of the zone comprising the bell and the diffuser
  • FIGS. 3 to 5 represent in section a swimming pool "skimmer" with integrated self-cleaning filter
  • FIG. 5 showing a filter according to the invention associated with a cartridge filter
  • FIG. 6 is an axial section of a swimming pool sand filter comprising an internal prefilter constituted by a self-cleaning filter according to the present invention.
  • the device consists of an enclosure 1 comprising near one of its ends a filter element 2 plane, arranged perpendicular to its axis.
  • An inlet pipe 3 coaxial, crosses the other end and is connected to the central channel 4 of a "bell" 5 with flared outlet mounted a short distance from the upstream side of the filter element 2.
  • a conical diffuser 6 In the center of the part flared is a conical diffuser 6, the base of which is pressed against the filter element, and delimiting with the bell 5 and the filter element an internal chamber 7; an outer chamber 8, annular, being formed by the space located between the peripheral skirt 9 of the bell and the inner wall of the enclosure 1.
  • the latter is closed, downstream of the filter element 2, by a dome 10 terminating in an outlet nozzle 11 intended to be connected to a discharge pipe.
  • the liquid to be filtered arrives, via the conduit 3 and the central channel 4, in the internal chamber 7 where it is deflected by the diffuser 6 in a flow tangent to the filter element, the flow of which has a centrifugal component imparting to the particles in suspension a sufficient radial speed so that they are not agglutinated against the filter 2 by the liquid which passes through it, but penetrate into the external chamber 8, then from there into the upstream zone of the enclosure intended to collect them, and this despite the absence of current in the external chamber and the upstream zone, due to the fact that the latter is closed and has no permanent racking.
  • the necessary acceleration of the flow is obtained thanks to the shape of the internal chamber 7, the thickness of which decreases from the center towards the periphery.
  • the shapes and dimensions of the various components can be any, provided that the above flow conditions are observed.
  • the enclosure may advantageously consist of upstream and downstream cylindrical and concentric zones, of circular section; the filter element being in the form of a disc.
  • the enclosure 1, the bell 5 and the central channel thereof have diameters close to 160, 130 and 50 mm respectively.
  • the flared part of the bell forms an angle C of 14 ° with the filter element 2, and the distances A and B between the latter and the flared part are between 2 and 3 mm for the internal edge, and between 1 and 2 mm for the outer edge.
  • the diffuser 6 is formed by two superimposed trunks of cones, the first, being attached to the filter element 2, having a diameter at the base close to that of the central channel 4 and whose generator forms an angle D substantially equal to 25 ° with the filter element, and the second, located upstream of the first, having an apex angle of 90 ° (angle E of 45 ° with the surface of the filter).
  • the upstream part of the skirt 9 of the bell 5 also forms a truncated cone, with a height of about 10 mm and whose generatrix forms an angle close to 20 ° with the axis of the bell, so as to create a narrowing of the outer chamber 8.
  • the removal of substances retained by the device can be carried out simply by purging 15 located at the bottom of the upstream area of the enclosure 1 ( Figure 6).
  • One or more filters according to the invention can be integrated into the device (“skimmer” 12) taking the water to be regenerated from a swimming pool ( Figures 3 to 5).
  • the self-cleaning filter is then fed from the top, the filter element being arranged at the bottom.
  • the particles to be retained generally heavier than water, will tend to fall back into the bell 5.
  • the latter will advantageously be sized to occupy most of the upstream zone of the enclosure. 1 ( Figure 4).
  • a cartridge filter 13 can optionally be associated with the self-cleaning filter, the outlets 14 (prefiltered water) and 14 ′ (cartridge filter) of the two systems being both connected to the suction pipe of the pump.
  • the self-cleaning filter will serve as a self-cleaning prefilter during installation.
  • the sand filter usually used in swimming pool water treatment installations can advantageously be replaced by a self-cleaning filter according to the invention which, in this case, will be mounted directly at the outlet of the pump, thus constituting an assembly compact whose reduced size makes it possible to envisage the elimination of the technical room required by the sand filters.
  • the self-cleaning filter can also be used as a pre-filter and integrated into a swimming pool water filtration pump, which removes the usual pre-filter which tends to clog very quickly. It can also be integrated into a sand filter 16 and connected directly to the multi-way valve 17; it will preferably be placed inside the filter, below the upper diffuser 18 (FIG. 6). In this case, the self-cleaning filter will serve as a prefilter and will make it possible to significantly reduce the frequency of backwashing required with the use of a sand filter, as well as the size of the latter.
  • filter elements 2 each equipped with their bell 5 and their diffuser 6 may be mounted in series in the same enclosure, each of them being determined to ensure increasingly fine filtration.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A self-cleaning filter for liquids, consisting of a vessel (1) divided by a planar filter element (2) into a downstream portion connected to an outlet (11), and an upstream portion comprising a tapered diffuser (6) and a bell (5) with a flared opening, connected to the inlet (3) for the liquid to be treated and closely spaced from the filter element. The assembly imparts a centrifugal flow pattern to the liquid exiting the bell so that suspended particles are projected into an annular chamber between the bell and the inner wall of the vessel, then into the upstream portion which collects the particles and is cleaned by means of a discharge pipe in the lower part of the vessel. The filter is generally useful for removing physical particles suspended in liquids and has many uses, but is particularly suitable for filtering water, especially swimming pool water.

Description

FILTRE AUTO-NETTOYANT POUR LIQUIDE SELF-CLEANING FILTER FOR LIQUID
La présente invention a pour objet un filtre auto-nettoyant pour liquide.The present invention relates to a self-cleaning filter for liquid.
Il a d'une façon générale pour objet l'élimination des particules matérielles en suspension dans les liquides et peut convenir pour de nombreuses applications, mais il est surtout destiné à la filtration de l'eau et plus particulièrement au traitement des eaux de piscines.Its general purpose is the elimination of material particles in suspension in liquids and can be suitable for many applications, but it is especially intended for water filtration and more particularly for the treatment of swimming pool water.
Le flux de liquide traversant un filtre a tendance à plaquer les substances à retenir contre celui- ci et à le colmater plus ou moins rapidement, ce qui entraîne une diminution progressive du rendement de l'installation, et impose dans la plupart des cas de surdimensionner le filtre pour éviter des pertes de charge trop importantes.The flow of liquid passing through a filter tends to press the substances to be retained against it and to clog it more or less quickly, which leads to a gradual reduction in the efficiency of the installation, and in most cases requires oversizing. the filter to avoid excessive pressure drops.
Les installations de traitement des eaux de piscines comportent le plus souvent un filtre à sable très volumineux qu'il faut périodiquement régénérer par lavage à contre courant en actionnant une vanne multivoies. Malgré cette opération périodique, le filtre se dégrade après une période d'utilisation prolongée et nécessite le remplacement du sable, ce qui est généralement effectué par un spécialiste au cours d'une intervention relativement coûteuse. Certaines piscines sont équipées d'un filtre à cartouche d'un encombrement plus faible, mais nécessitant des lavages manuels très contraignants de l'élément filtrant. Le dispositif selon la présente invention supprime tous ces inconvénients. En effet, il permet de réaliser des filtres, en particulier pour les piscines, d'un encombrement extrêmement réduit, d'un excellemment rendement, dont le coût de fabrication de l'élément filtrant est très faible et supprimant toute intervention manuelle de nettoyage. Son utilisation rend possible la réalisation d'une station de traitement de l'eau très compacte ne nécessitant pas de local technique.Most swimming pool water treatment installations include a very large sand filter which must be periodically regenerated by backwashing by actuating a multi-way valve. Despite this periodic operation, the filter degrades after a prolonged period of use and requires the replacement of the sand, which is generally carried out by a specialist during a relatively expensive intervention. Some swimming pools are fitted with a cartridge filter with a smaller footprint, but requiring very restrictive manual washing of the filter element. The device according to the present invention eliminates all these drawbacks. Indeed, it makes it possible to produce filters, in particular for swimming pools, of an extremely small size, of an excellent yield, the manufacturing cost of the filter element is very low and eliminating any manual cleaning intervention. Its use makes it possible to create a very compact water treatment station that does not require a technical room.
Il est constitué d'une enceinte divisée, par un élément filtrant plan, en une zone aval raccordée à la tubulure de sortie, et une zone amont comportant un diffuseur conique et une cloche à sortie évasée, raccordée au conduit d'arrivée du liquide à traiter, et disposée à faible distance de l'élément filtrant, l'ensemble étant déterminé pour imposer au liquide, à la sortie de la cloche, un écoulement centrifuge projetant les particules en suspension dans une chambre annulaire située entre la cloche et la paroi interne de l'enceinte, puis de là dans la zone amont destinée à les recueillir, le nettoyage de cette dernière s'effectuant au moyen d'une purge située à la partie basse de l'enceinte.It consists of an enclosure divided, by a flat filtering element, into a downstream zone connected to the outlet pipe, and an upstream zone comprising a conical diffuser and a bell with flared outlet, connected to the liquid inlet pipe to treat, and disposed at a short distance from the filter element, the assembly being determined to impose on the liquid, at the outlet of the bell, a centrifugal flow projecting the particles in suspension in an annular chamber situated between the bell and the internal wall from the enclosure, then from there to the upstream area intended to collect them, the cleaning of the latter being carried out by means of a purge located at the lower part of the enclosure.
Sur les dessins schématiques annexés, donnés à titre d'exemples non limitatifs de formes de réalisation de l'objet de l'invention: la figure 1 représente en coupe longitudinale axiale un filtre auto-nettoyant de forme cylindrique, la figure 2 est un agrandissement de la zone comportant la cloche et le diffuseur, les figure 3 à 5 représentent en coupe un "skimmer" de piscine avec filtre auto-nettoyant intégré, la figure 5 montrant un filtre selon l'invention associé à un filtre à cartouche et la figure 6 est une coupe axiale d'un filtre à sable pour piscine comportant un préfiltre interne constitué d'un filtre auto-nettoyant selon la présente invention.In the appended schematic drawings, given by way of nonlimiting examples of embodiments of the subject of the invention: FIG. 1 shows in axial longitudinal section a self-cleaning filter of cylindrical shape, FIG. 2 is an enlargement of the zone comprising the bell and the diffuser, FIGS. 3 to 5 represent in section a swimming pool "skimmer" with integrated self-cleaning filter, FIG. 5 showing a filter according to the invention associated with a cartridge filter and FIG. 6 is an axial section of a swimming pool sand filter comprising an internal prefilter constituted by a self-cleaning filter according to the present invention.
Le dispositif, figures 1 à 6, est constitué d'une enceinte 1 comportant près de l'une de ses extrémités un élément filtrant 2 plan, disposé perpendiculairement à son axe. Un conduit 3 d'arrivée, coaxial, traverse l'autre extrémité et est raccordé au canal central 4 d'une "cloche" 5 à sortie évasée montée à faible distance du côté amont de l'élément filtrant 2. Au centre de la partie évasée se trouve un diffuseur 6 conique, dont la base est plaquée contre l'élément filtrant, et délimitant avec la cloche 5 et l'élément filtrant une chambre interne 7 ; une chambre externe 8, annulaire, étant formée par l'espace situé entre la jupe périphérique 9 de la cloche et la paroi interne de l'enceinte 1. Cette dernière est fermée, à l'aval de l'élément filtrant 2, par un dôme 10 se terminant par un embout de sortie 11 destiné à être raccordé à une tubulure d'évacuation.The device, Figures 1 to 6, consists of an enclosure 1 comprising near one of its ends a filter element 2 plane, arranged perpendicular to its axis. An inlet pipe 3, coaxial, crosses the other end and is connected to the central channel 4 of a "bell" 5 with flared outlet mounted a short distance from the upstream side of the filter element 2. In the center of the part flared is a conical diffuser 6, the base of which is pressed against the filter element, and delimiting with the bell 5 and the filter element an internal chamber 7; an outer chamber 8, annular, being formed by the space located between the peripheral skirt 9 of the bell and the inner wall of the enclosure 1. The latter is closed, downstream of the filter element 2, by a dome 10 terminating in an outlet nozzle 11 intended to be connected to a discharge pipe.
Le liquide à filtrer arrive, par le conduit 3 et le canal central 4, dans la chambre interne 7 où il est dévié par le diffuseur 6 en un flux tangent à l'élément filtrant dont l'écoulement présente une composante centrifuge imprimant aux particules en suspension une vitesse radiale suffisante pour qu'elles e soient pas agglutinées contre le filtre 2 par le liquide qui le traverse, mais pénètrent dans la chambre externe 8, puis de là dans la zone amont de l'enceinte destinée à les recueillir, et cela malgré l'absence de courant dans la chambre externe et la zone amont, due au fait que cette dernière est fermée et ne comporte aucune prise de soutirage permanent. L'accélération nécessaire du flux est obtenue grâce à la forme de la chambre interne 7 dont l'épaisseur diminue du centre vers la périphérie.The liquid to be filtered arrives, via the conduit 3 and the central channel 4, in the internal chamber 7 where it is deflected by the diffuser 6 in a flow tangent to the filter element, the flow of which has a centrifugal component imparting to the particles in suspension a sufficient radial speed so that they are not agglutinated against the filter 2 by the liquid which passes through it, but penetrate into the external chamber 8, then from there into the upstream zone of the enclosure intended to collect them, and this despite the absence of current in the external chamber and the upstream zone, due to the fact that the latter is closed and has no permanent racking. The necessary acceleration of the flow is obtained thanks to the shape of the internal chamber 7, the thickness of which decreases from the center towards the periphery.
Les formes et dimensions des différents composants peuvent être quelconques, pourvu que les conditions d'écoulement ci-dessus soient respectées. L'enceinte pourra avantageusement être constituée de zones amont et aval cylindriques et concentriques, de section circulaire ; l'élément filtrant se présentant sous la forme d'un disque.The shapes and dimensions of the various components can be any, provided that the above flow conditions are observed. The enclosure may advantageously consist of upstream and downstream cylindrical and concentric zones, of circular section; the filter element being in the form of a disc.
Dans une forme de réalisation particulière, l'enceinte 1, la cloche 5 et le canal central de celle-ci ont respectivement des diamètres voisins de 160, 130 et 50 mm. La partie évasée de la cloche forme un angle C de 14 ° avec l'élément filtrant 2, et les distances A et B entre ce dernier et la partie évasée sont comprises entre 2 et 3 mm pour le bord interne, et entre 1 et 2 mm pour le bord externe. Le diffuseur 6 est formé de deux troncs de cônes superposés, le premier, se trouvant accolé à l'élément filtrant 2, ayant un diamètre à la base voisin de celui du canal central 4 et dont la génératrice forme un angle D sensiblement égal à 25 ° avec l'élément filtrant, et le second, situé en amont du premier, ayant un angle au sommet de 90 ° (angle E de 45 ° avec la surface du filtre) . La partie amont de la jupe 9 de la cloche 5 forme également un tronc de cône, d'une hauteur d'environ 10 mm et dont la génératrice forme un angle voisin de 20 ° avec l'axe de la cloche, de manière à créer un rétrécissement de la chambre externe 8.In a particular embodiment, the enclosure 1, the bell 5 and the central channel thereof have diameters close to 160, 130 and 50 mm respectively. The flared part of the bell forms an angle C of 14 ° with the filter element 2, and the distances A and B between the latter and the flared part are between 2 and 3 mm for the internal edge, and between 1 and 2 mm for the outer edge. The diffuser 6 is formed by two superimposed trunks of cones, the first, being attached to the filter element 2, having a diameter at the base close to that of the central channel 4 and whose generator forms an angle D substantially equal to 25 ° with the filter element, and the second, located upstream of the first, having an apex angle of 90 ° (angle E of 45 ° with the surface of the filter). The upstream part of the skirt 9 of the bell 5 also forms a truncated cone, with a height of about 10 mm and whose generatrix forms an angle close to 20 ° with the axis of the bell, so as to create a narrowing of the outer chamber 8.
L'élimination des substances retenues par le dispositif peut s'effectuer simplement grâce à une purge 15 située à la partie basse de la zone amont de l'enceinte 1 (figure 6).The removal of substances retained by the device can be carried out simply by purging 15 located at the bottom of the upstream area of the enclosure 1 (Figure 6).
Un ou plusieurs filtres selon l'invention peuvent être intégrés au dispositif ("skimmer" 12) prélevant l'eau à régénérer d'une piscine (figures 3 à 5) . Le filtre auto-nettoyant est alors alimenté par le haut, l'élément filtrant étant disposé en partie basse. Dans ce cas, les particules à retenir, en général plus lourdes que l'eau, auront tendance à retomber dans la cloche 5. Pour cette raison, cette dernière sera avantageusement dimensionnée pour occuper la plus grande partie de la zone amont de l'enceinte 1 (figure 4). Un filtre à cartouche 13 peut éventuellement être associé au filtre auto-nettoyant, les sorties 14 (eau préfiltrée) et 14' (filtre à cartouche) des deux systèmes étant toutes les deux raccordées à la conduite d'aspiration de la pompe. Dans ce cas, le filtre auto-nettoyant servira de préfiltre auto-nettoyant à l'installation. Le filtre à sable habituellement utilisé dans les installations de traitement d'eau de piscine peut avantageusement être remplacé par un filtre auto¬ nettoyant selon l'invention qui, dans ce cas, sera monté directement à la sortie de la pompe, constituant ainsi un ensemble compact dont l'encombrement réduit permet d'envisager la suppression du local technique nécessité par les filtres à sable.One or more filters according to the invention can be integrated into the device ("skimmer" 12) taking the water to be regenerated from a swimming pool (Figures 3 to 5). The self-cleaning filter is then fed from the top, the filter element being arranged at the bottom. In this case, the particles to be retained, generally heavier than water, will tend to fall back into the bell 5. For this reason, the latter will advantageously be sized to occupy most of the upstream zone of the enclosure. 1 (Figure 4). A cartridge filter 13 can optionally be associated with the self-cleaning filter, the outlets 14 (prefiltered water) and 14 ′ (cartridge filter) of the two systems being both connected to the suction pipe of the pump. In this case, the self-cleaning filter will serve as a self-cleaning prefilter during installation. The sand filter usually used in swimming pool water treatment installations can advantageously be replaced by a self-cleaning filter according to the invention which, in this case, will be mounted directly at the outlet of the pump, thus constituting an assembly compact whose reduced size makes it possible to envisage the elimination of the technical room required by the sand filters.
Le filtre auto-nettoyant peut également être utilisé comme préfiltre et intégré à une pompe de filtration d'eau de piscine, ce qui permet de supprimer le préfiltre habituel qui a tendance à s'obstruer très rapidement. Il peut également être intégré à un filtre à sable 16 et raccordé directement à la vanne multivoies 17 ; il sera de préférence disposé à l'intérieur du filtre, au-dessous du diffuseur supérieur 18 (figure 6). Dans ce cas, le filtre auto-nettoyant servira de préfiltre et permettra de réduire de façon tout à fait significative la fréquence des lavages à contre-courant nécessaires avec l'utilisation d'un filtre à sable, ainsi que l'encombrement de ce dernier.The self-cleaning filter can also be used as a pre-filter and integrated into a swimming pool water filtration pump, which removes the usual pre-filter which tends to clog very quickly. It can also be integrated into a sand filter 16 and connected directly to the multi-way valve 17; it will preferably be placed inside the filter, below the upper diffuser 18 (FIG. 6). In this In this case, the self-cleaning filter will serve as a prefilter and will make it possible to significantly reduce the frequency of backwashing required with the use of a sand filter, as well as the size of the latter.
Pour certaines applications nécessitant un liquide très pur, plusieurs éléments filtrants 2 équipés chacun de leur cloche 5 et de leur diffuseur 6 pourront être montés en série dans la même enceinte, chacun d'eux étant déterminé pour assurer une filtration de plus en plus fine.For certain applications requiring a very pure liquid, several filter elements 2 each equipped with their bell 5 and their diffuser 6 may be mounted in series in the same enclosure, each of them being determined to ensure increasingly fine filtration.
Le positionnement des divers éléments constitutifs donne à l'objet de l'invention un maximum d'effets utiles qui n'avaient pas été, à ce jour, obtenus par des dispositifs similaires. The positioning of the various constituent elements gives the object of the invention a maximum of useful effects which had not, to date, been obtained by similar devices.

Claims

REVENDICATIONS
1°. Filtre auto-nettoyant, utilisable pour de nombreuses applications, mais surtout destiné à la filtration de l'eau et plus particulièrement au traitement des eaux de piscines, constitué d'une enceinte (1) formée d'une zone amont et d'une zone aval séparées par un élément filtrant (2), caractérisé en ce que cet élément filtrant est plan et que la zone amont comporte une cloche (5) avec un canal central (4) raccordé au conduit (3) d'arrivée du liquide à traiter, et dont la sortie évasée, disposée à faible distance dudit élément filtrant, est équipée en son centre d'un diffuseur conique (6) apte à dévier le flux du liquide à traiter de manière à ce que son écoulement devienne partiellement centrifuge, la forme de la chambre interne (7), délimitée par la partie évasée de la cloche (5), le diffuseur conique (6) et l'élément filtrant (2), et dont l'épaisseur diminue du centre vers la périphérie, étant déterminée pour que le flux subisse une accélération telle que les particules en suspension acquièrent une vitesse radiale suffisante pour ne pas être agglutinées contre l'élément filtrant (2) par le liquide qui le traverse, mais pénétrer dans la chambre annulaire (8) formée par l'espace situé entre la jupe périphérique (9) de la cloche et la paroi interne de l'enceinte (1), puis de là dans la zone amont de ladite enceinte destinée à les recueillir.1 °. Self-cleaning filter, usable for many applications, but especially intended for water filtration and more particularly for the treatment of swimming pool water, consisting of an enclosure (1) formed by an upstream zone and a zone downstream separated by a filter element (2), characterized in that this filter element is planar and that the upstream zone comprises a bell (5) with a central channel (4) connected to the conduit (3) for arrival of the liquid to be treated , and whose flared outlet, disposed at a short distance from said filter element, is equipped in its center with a conical diffuser (6) capable of deflecting the flow of the liquid to be treated so that its flow becomes partially centrifugal, the shape of the internal chamber (7), delimited by the flared part of the bell (5), the conical diffuser (6) and the filter element (2), the thickness of which decreases from the center towards the periphery, being determined for let the flow accelerate ion such that the particles in suspension acquire a sufficient radial speed not to be agglutinated against the filter element (2) by the liquid which passes through it, but to penetrate into the annular chamber (8) formed by the space situated between the skirt device (9) of the bell and the inner wall of the enclosure (1), and from there in the upstream area of said enclosure intended to collect them.
2°. Filtre selon la revendication 1, se caractérisant par le fait que le diffuseur conique (6) est formé de deux troncs de cônes superposés, le premier dont la base, accolée à l'élément filtrant (2), a un diamètre voisin de celui du canal central de la cloche (5), et dont la génératrice forme un angle (D) sensiblement égal à 25 degrés avec la surface dudit élément filtrant, et le second, situé en amont du premier, ayant un angle au sommet de 90 degrés.2 °. Filter according to claim 1, characterized in that the conical diffuser (6) is formed by two trunk of superimposed cones, the first of which the base, attached to the filter element (2), has a diameter close to that of central channel of the bell (5), and whose generator forms an angle (D) substantially equal to 25 degrees with the surface of said filter element, and the second, located upstream of the first, having an angle at the top of 90 degrees.
3°. Filtre selon l'une quelconque des revendications précédentes, se caractérisant par le fait que la partie évasée de la cloche (5) forme un angle (C) de 14 degrés avec l'élément filtrant (2), et que les distances (A, B) entre ce dernier et la partie évasée sont comprises entre 2 et 3 millimètres pour le bord interne, et entre 1 et 2 millimètres pour le bord externe.3 °. Filter according to any one of the preceding claims, characterized in that the flared part of the bell (5) forms an angle (C) of 14 degrees with the filter element (2), and that the distances (A, B) between the latter and the flared part are between 2 and 3 millimeters for the inner edge, and between 1 and 2 millimeters for the outer edge.
4°. Filtre selon l'une quelconque des revendications précédentes, se caractérisant par le fait que la partie amont de la jupe périphérique (8) de la cloche (5) forme un tronc de cône dont la génératrice forme un angle (F) voisin de 20 degrés avec l'axe de ladite cloche, de manière à créer un rétrécissement de la chambre annulaire (8) .4 °. Filter according to any one of the preceding claims, characterized in that the upstream part of the peripheral skirt (8) of the bell (5) forms a truncated cone whose generator forms an angle (F) close to 20 degrees with the axis of said bell, so as to create a narrowing of the annular chamber (8).
5°. Filtre selon l'une quelconque des revendications précédentes, se caractérisant par le fait que l'enceinte (1) est cylindrique et a un diamètre d'environ 160 millimètres, la cloche (5) et le canal central (4) de celle-ci ayant respectivement des diamètres voisins de 130 et 50 millimètres.5 °. Filter according to any one of the preceding claims, characterized in that the enclosure (1) is cylindrical and has a diameter of approximately 160 millimeters, the bell (5) and the central channel (4) thereof having diameters of 130 and 50 millimeters respectively.
6°. Filtre selon l'une quelconque des revendications précédentes, se caractérisant par le fait que les zones amont et aval de l'enceinte (1) sont formées de cylindriques concentriques de section circulaire, l'élément filtrant (2) ayant la forme d'un disque. 7°. Filtre selon l'une quelconque des revendications précédentes, se caractérisant par le fait que l'enceinte (1) comporte une purge (15), située en partie basse de la zone amont, et destinée à l'élimination des substances retenues.6 °. Filter according to any one of the preceding claims, characterized in that the upstream and downstream zones of the enclosure (1) are formed by concentric cylindrical cylinders of circular section, the filter element (2) having the form of a disk. 7 °. Filter according to any one of the preceding claims, characterized in that the enclosure (1) comprises a drain (15), located in the lower part of the upstream zone, and intended for the elimination of the retained substances.
8°. Filtre selon l'une quelconque des revendications précédentes, se caractérisant par le fait que plusieurs éléments filtrants (2) équipés chacun de leur cloche (5) et de leur diffuseur (6) sont montés en série dans la même enceinte (1), chaque ensemble étant déterminé pour assurer une filtration de plus en plus fine.8 °. Filter according to any one of the preceding claims, characterized in that several filter elements (2) each equipped with their bell (5) and their diffuser (6) are mounted in series in the same enclosure (1), each all being determined to ensure increasingly fine filtration.
9°. Installation de traitement d'eau de piscine, caractérisée en ce que le filtre est constitué d'un filtre auto-nettoyant selon l'une quelconque des revendications précédentes, monté directement à la sortie de la pompe.9 °. Swimming pool water treatment installation, characterized in that the filter consists of a self-cleaning filter according to any one of the preceding claims, mounted directly at the outlet of the pump.
10°. Dispositif de prélèvement de l'eau à régénérer d'une piscine ("skimmer") caractérisé en ce qu'il comporte un ou plusieurs filtres auto-nettoyant intégrés conformes à l'une quelconque des revendications 1 à 8, chaque filtre auto-nettoyant étant alimenté par le haut, l'élément filtrant (2) étant disposé en partie basse et les particules à retenir étant recueillies dans la cloche (5) dimensionnée de manière à occuper la plus grande partie de la partie amont de l'enceinte (1).10 °. Device for withdrawing water to be regenerated from a swimming pool ("skimmer") characterized in that it comprises one or more integrated self-cleaning filters according to any one of claims 1 to 8, each self-cleaning filter being fed from above, the filter element (2) being arranged in the lower part and the particles to be retained being collected in the bell (5) dimensioned so as to occupy most of the upstream part of the enclosure (1 ).
11°. Dispositif selon la revendication 10, se caractérisant par le fait que chaque filtre auto¬ nettoyant est associé à un filtre à cartouche (13), les sorties (14, 14') des deux systèmes étant toutes les deux raccordées à la conduite d'aspiration de la pompe de la piscine.11 °. Device according to claim 10, characterized in that each self-cleaning filter is associated with a cartridge filter (13), the outputs (14, 14 ') of the two systems being both connected to the pool pump suction line.
12°. Pompe de filtration d'eau de piscine caractérisée en ce qu'elle comporte un filtre auto¬ nettoyant intégré conforme à l'une quelconque des revendications 1 à 9 et utilisé en lieu et place du préfiltre habituel.12 °. Swimming pool water filtration pump characterized in that it comprises an integrated self-cleaning filter according to any one of claims 1 to 9 and used in place of the usual prefilter.
13°. Filtre à sable (16) de traitement d'eau de piscine caractérisée en ce qu'il comporte un préfiltre intégré constitué d'un filtre auto-nettoyant conforme à l'une quelconque des revendications 1 à 9. 13 °. Swimming pool water treatment sand filter (16) characterized in that it comprises an integrated prefilter consisting of a self-cleaning filter according to any one of claims 1 to 9.
PCT/FR1997/000466 1996-03-15 1997-03-14 Self-cleaning filter for liquids WO1997034681A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9603474A FR2746033B1 (en) 1996-03-15 1996-03-15 SELF-CLEANING FILTER FOR LIQUID
FR96/03474 1996-03-15

Publications (1)

Publication Number Publication Date
WO1997034681A1 true WO1997034681A1 (en) 1997-09-25

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WO (1) WO1997034681A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004025053A1 (en) * 2002-09-13 2004-03-25 John Andrew Valentine Hoal A leaf trap device
WO2020228843A1 (en) * 2019-05-12 2020-11-19 天津望圆环保科技有限公司 Underwater sewage suction machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2179473C1 (en) * 2000-07-24 2002-02-20 Мартынов Петр Никифорович Method and device for filtration of liquid and filtering material
SE543305C2 (en) * 2019-04-10 2020-11-24 Bluewater Sweden Ab A water filter unit

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Publication number Priority date Publication date Assignee Title
DE823821C (en) * 1949-09-16 1951-12-06 Daimler Benz Ag Fluid filters, especially for the lubricating oil circuit of internal combustion engines
GB804163A (en) * 1955-06-24 1958-11-12 Sudan Gezira Board Filters, and water purification plants employing filters
SU1057071A1 (en) * 1982-07-29 1983-11-30 Предприятие П/Я В-8611 Druck filter

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Publication number Priority date Publication date Assignee Title
DE823821C (en) * 1949-09-16 1951-12-06 Daimler Benz Ag Fluid filters, especially for the lubricating oil circuit of internal combustion engines
GB804163A (en) * 1955-06-24 1958-11-12 Sudan Gezira Board Filters, and water purification plants employing filters
SU1057071A1 (en) * 1982-07-29 1983-11-30 Предприятие П/Я В-8611 Druck filter

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SOVIET INVENTIONS ILLUSTRATED Week 8430, 5 September 1984 Derwent World Patents Index; AN 84187764, XP002021685 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004025053A1 (en) * 2002-09-13 2004-03-25 John Andrew Valentine Hoal A leaf trap device
WO2020228843A1 (en) * 2019-05-12 2020-11-19 天津望圆环保科技有限公司 Underwater sewage suction machine
US12270223B2 (en) 2019-05-12 2025-04-08 Wybotics Co., Ltd. Underwater debris suction apparatus

Also Published As

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FR2746033A1 (en) 1997-09-19
FR2746033B1 (en) 1998-04-17

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