EP1899073A1 - Device for electrostatic precipitation of charged particles carried in an air stream - Google Patents

Device for electrostatic precipitation of charged particles carried in an air stream

Info

Publication number
EP1899073A1
EP1899073A1 EP06744771A EP06744771A EP1899073A1 EP 1899073 A1 EP1899073 A1 EP 1899073A1 EP 06744771 A EP06744771 A EP 06744771A EP 06744771 A EP06744771 A EP 06744771A EP 1899073 A1 EP1899073 A1 EP 1899073A1
Authority
EP
European Patent Office
Prior art keywords
wings
electrode
electrodes
wall
collection device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06744771A
Other languages
German (de)
French (fr)
Other versions
EP1899073B1 (en
Inventor
Frédéric Ladrech
Didier Loup
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.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Publication of EP1899073A1 publication Critical patent/EP1899073A1/en
Application granted granted Critical
Publication of EP1899073B1 publication Critical patent/EP1899073B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/08—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/30—Details of magnetic or electrostatic separation for use in or with vehicles

Definitions

  • the present invention is in the field of air treatment devices circulating through an installation, such as a ventilation, heating and / or air conditioning installation, in particular for a motor vehicle. It relates to a device for electrostatic precipitation of particles previously charged and conveyed in a flow of air circulating inside such an installation.
  • Electrostatic devices are known equipment equipping an installation inside which circulates a flow of air. These devices are likely to be used to sanitize the air circulating inside a ventilation, heating and / or air conditioning, especially for a motor vehicle. Such apparatuses are organized to retain particles present in the airflow, such as particles of dust, smoke or the like. These devices include a device for electrically charging particles in the air flow, with a charged particle collection device. The collection device is placed in the airstream downstream of the charging device, to retain by electrostatic precipitation the previously charged particles.
  • the charging device is for example of the corona type and comprises a pair of electrodes respectively connected to one of the terminals of a polarized power source.
  • the particles present in the air flow circulate between the electrodes which deliver a high voltage discharge, indifferently positive or negative. This discharge produces ions that collide with the particles and charge them electrically.
  • the collection device consists for example of a non-woven fiber filter, such as a felt, whose fibers are charged with a polarity opposite to that applied to the particles by the charging device, to cause their precipitation on the fibers. fibers.
  • a disadvantage relating to such a collection device lies in the weakening of the fiber load, which decreases as the filter retains the particles. This type of collection device has a durability and insufficient efficiency.
  • a problem to be solved lies in the organization of the collection device which must allow its rapid production and low cost, without affecting its durability or its effectiveness, and which must be of limited size. More particularly, the collection device must be made from a small number of parts to reduce its costs of obtaining and mounting. The positioning of the electrodes must be precise to avoid discharges between them. This accuracy must be obtained in a simple way to not increase the complexity of the device, the number of parts or the difficulty of its assembly. In addition, the electrical connection of the electrodes must be achieved in a simple manner, limiting the necessary wiring.
  • the object of the present invention is to provide a collection device by electrostatic precipitation of particles previously charged and conveyed in an air flow, this device being intended to equip an installation through which circulates the air flow.
  • the present invention also relates to an installation equipped with such a collection device, and more particularly to a ventilation, heating and / or air conditioning, including a vehicle. It is more particularly intended to provide such a collection device whose operation is durable and efficient, which has a small footprint and which is made from a small number of parts whose assembly is easy and fast, in particular to allow the manufacture of the device at a competitive cost and possibly to facilitate its maintenance and maintenance operations.
  • the device of the present invention is a collection device by electrostatic precipitation of particles previously charged and conveyed in an air flow.
  • This device comprises at least two electrodes arranged in the air flow, these electrodes being alternately connected to the ground and to a terminal of a polarized source.
  • such a device is mainly recognizable in that said electrodes each consist of a wall comprising openings, at least one of whose faces walls are formed with wings, the wings of the connected electrode. at the terminal collecting the previously charged particles. Thanks to these provisions, the structure of the electrodes is simplified and their installation inside the device is made easy. More particularly, the particle collecting flanges are assembled on the same element, which is likely to be easily made from a single manufacturing operation, and whose mounting inside the device is made easy by its character. monobloc interconnecting the different wings of the electrodes.
  • the wall is disposed transversely to the air flow, the wings being oriented substantially parallel to the latter.
  • the openings formed through the wall allow the passage of the air flow by limiting the aeraulic losses, while the wings are likely to extend as much as necessary parallel to the air flow to collect the particles.
  • the wings are preferably interconnected by junction elements embodying the wall.
  • the openings extend between two successive joining elements. More specifically, the wall is formed from the connecting elements, which extend from one wing to the other to connect them transversely to each other.
  • Several connecting elements are preferably used by being distributed longitudinally along the wings, the openings being formed between them. These provisions are such that the connecting elements are likely to have a reduced surface against the flow of air, the complementary surface formed by the openings leaving a free passage to the air by reducing air losses as best as possible, without to undermine the robustness of the junction of the wings between them.
  • the wall and the wings forming the electrode advantageously form a unitary piece.
  • a unitary piece can be easily made by mechanical production methods or by molding a plastic material.
  • the device comprises at least one pair of electrodes whose walls are arranged vis-à-vis.
  • the wings are nested with an electrode the other. More specifically, the walls are arranged parallel opposite each other, the wings of a wall being arranged in the space between two wings of the other wall.
  • One of these electrodes is more particularly connected to ground, while the other is connected to the terminal of an electrical source.
  • polarized in particular of a reverse polarity to that used for the prior electric charging of the particles.
  • the device comprises at least three successive electrodes, a median electrode having wings at each of its faces which are interleaved with the end electrode wings.
  • the median electrode is more particularly connected to the ground and / or the terminal of a polarized electrical source, in particular of a reverse polarity to that used for the prior electric charge of the particles, whereas the other two electrodes are inversely connected to the terminal of a polarized electrical source, in particular of a reverse polarity to that used for the prior electric charging of the particles, and / or to ground.
  • the median electrode is capable of being made from a pair of strips assembled to one another via their wall placed back to back, or from the same folded strip to form wings extending on both sides of the wall.
  • the median electrode is also capable of being formed by molding a plastic material, being rendered conductive by coating a metal material or by load for example.
  • the electrodes are held in the general plane of their wall inside a support, as shaped in frame.
  • This frame is advantageously composed of two elementary frames assembled to one another, between which the electrodes are held.
  • the device preferably comprises at least one member for maintaining the wings of at least one electrode at a set distance separating the wings from each other.
  • the holding member is advantageously shaped as a comb.
  • the teeth of the comb are likely to be engaged on the connecting elements, and / or on the wings.
  • the teeth of the comb are engaged alternately on two nested wing electrodes. More particularly, the teeth of the comb are engaged on the wings of each of the electrodes in the zone of the openings that comprises the wall of one of the electrodes.
  • the device comprises at least one pair of combs, each of which is respectively engaged with the wings of one electrode and with the base of the wings of the other electrode.
  • the holding member also constitutes an assembly member of the electrodes to the frame, to promote the quality of the junction between the electrodes and the frame.
  • the holding member is formed on at least one of the elementary frames, with which it advantageously forms a unitary piece, obtained by molding an electrically insulating plastic material in particular.
  • the wall is advantageously provided with an electrical connection member. It follows from these provisions that the plurality of wings that comprises the electrode are jointly supplied via the wall, and more particularly via the connecting elements, from a single electrical connection member.
  • the frame includes in particular at least one light through which emerges the connecting member fitted to each of the electrodes.
  • the collection device is capable of being associated with a pulsator generating the air flow and of being disposed downstream of a device for charging the particles.
  • the collection device and the charging device form a single unit housed in a common housing, this housing preferably housing the blower.
  • a housing can be used independently to clean the air occupying a space, such as the passenger compartment of a vehicle.
  • Said housing is also likely to be that of a ventilation system, heating and / or air conditioning, including a vehicle.
  • the collection device is preferably placed in the air inlet of the installation, downstream of the charging device.
  • the collection device and the charging device are formed of separate assemblies housed in respective housings in aeraulic communication for the passage of the air flow from one to the other of the housings.
  • an electrode of a collection device of the invention it is formed from a punched strip to arrange the openings, and then folded in its general plane to form the wings.
  • an electrode of a collection device of the invention it is formed by molding a plastic material made conductive.
  • an electrode of a collection device of the invention it is formed by extrusion of a plastic material made conductive.
  • Said plastic material is for example made conductive by adding a metal filler, or by applying a coating, especially metal. According. a fourth method of obtaining an electrode of a collection device of the invention, it is formed by extrusion of a metal material.
  • Figure 1 is a schematic sectional view of a housing housing a collection device according to the invention.
  • FIG. 2 is a diagrammatic perspective view of a first variant embodiment of a participating electrode of the collection device illustrated in FIG.
  • FIGS. 3a and 3b are diagrammatic sectional views taken respectively in the area of the openings and in the area of the joining elements that comprise the participating electrodes of the collection device illustrated in FIG.
  • FIGS. 4a and 4b are diagrammatic sectional views taken respectively in the area of the openings and in the area of the joining elements that comprise the participating electrodes of a collection device according to a second variant of the invention.
  • FIGS. 5a and 5b are diagrammatic cross-sectional views taken respectively in the area of the openings and in the area of the joining elements that comprise participating electrodes of a collection device according to a third variant of the invention.
  • Fig.6 is a schematic plan view of a strip from which is made an electrode shown in fig.2.
  • Fig.7a to Fig.7f are schematic sectional views of the strip illustrated in Fig.6 at different stages of a first method of manufacturing the collection device.
  • FIGS. 5a to FIG. 5B are diagrammatic perspective views of different steps of producing an electrode illustrated in FIG. 2 according to a second manufacturing method.
  • Fig.9 is a schematic perspective view of a basic frame for receiving electrodes shown in Fig.2.
  • FIG. 10 is a diagrammatic perspective view of a frame equipped with a pair of electrodes illustrated in FIG.
  • FIGS. 11 and 12 are diagrammatic views in partial section of a frame illustrated in FIG. 10, respectively formed through perforations and joining elements of two interleaved electrodes according to a first embodiment of FIG. collection device.
  • FIGS. 13 and 14 are diagrammatic views in partial section of a frame illustrated in FIG. 10, respectively formed through perforations and joining elements of two interleaved electrodes according to a second embodiment of FIG. collection device.
  • a housing (1) houses an electrostatic device for sanitizing a flow of air flowing therethrough. Said apparatus is more particularly intended to retain by electrostatic precipitation particles carried by the air flow, such as dust particles, and prevent their rejection outside the housing (1).
  • the box . (1) houses a blower (2) for circulating through the electrostatic apparatus the air admitted into the housing (1) from an air inlet (3) formed in the latter upstream of the blower (2), to an air outlet (4) in the housing (1) downstream of the blower (2).
  • the housing (1) is likely to be that of a ventilation system, heating and / or air conditioning, including a motor vehicle.
  • the blower (2) is indifferently that of the installation or an additional blower.
  • the electrostatic apparatus is preferably placed in the air inlet (3) of the installation, or in the ventilation system, heating and / or air conditioning, indifferently upstream or downstream of the blower (2 ).
  • the housing (1) is also likely to be a stand-alone housing placed in the passenger compartment to clean the air contained therein.
  • the electrostatic apparatus comprises a device (5), such as a corona type charger, which is intended to charge particles carried by the air flow and a device (6) for collecting the previously charged particles, which is arranged in the airstream downstream of the charging device (5).
  • This corona type charger more particularly comprises a pair of electrodes respectively connected to one of the terminals of a polarized power source. The particles present in the air flow circulate between the electrodes which deliver a high voltage discharge, indifferently positive or negative. This discharge produces ions that collide with the particles and charge them electrically.
  • the latter comprises two electrodes (7, 8) arranged in the housing (1) facing each other .
  • a first electrode (7) is connected to the ground (9), while a second electrode (8) is connected to one of the terminals (10) of a polarized power source (11), and more particularly to a terminal of inverse polarity to that applied to the particles by the charging device (5).
  • the particles conveyed in the air stream, previously loaded by the charging device (5), are attracted and then retained by the second electrode (8) to prevent their rejection from the housing (1).
  • the charger and the collector can belong to a single set, in particular being grouped together in the same box, or else be organized in two separate sets.
  • an electrode consists of a wall (12) at one of the faces of which there are wings (13) of small thickness. These wings (13) are oriented orthogonally to the wall (12) and parallel to each other. Two neighboring wings (13) are spaced from each other by a distance of the order of a few millimeters.
  • the wall (12) is disposed in the housing (1) orthogonally. to the flow direction of the air flow (14) so that the wings (13) extend parallel to this direction.
  • the latter comprises openings (15) formed therethrough. These openings (15) occupy most of the surface of the wall (12) and extend transversely between two wings (13) adjacent. Elements of junction (16) of the wings (13) between them materialize the wall (12).
  • the cumulative surface of the junction elements (16) is much smaller than the cumulative surface of the openings (15), to optimize the passage of the air flow through the wall (12) and limit the aeraulic losses.
  • the cumulative surface of the joining elements (16) is just necessary to give the electrode a satisfactory mechanical strength.
  • Such an electrode has a large particle collection surface for a small footprint, its installation in the collection device (6) is made from the implementation of a single piece, which associates the wall (12) composed of connecting elements (16), and wings (13) joined together by them.
  • the collection device (6) comprises a pair of electrodes (7,8) such as that illustrated in fig.2.
  • the respective wings (13) of the two electrodes (7, 8) are nested one inside the other so that a wing (13) of an electrode is interposed between two adjacent wings (13) of another electrode.
  • the walls (12) of the two electrodes (7,8) are parallel to one another, the junction elements (16) and the respective openings (15) which they comprise being placed opposite each other. Such an arrangement of the junction elements (16) and openings (15) minimizes the aeraulic losses.
  • the wings (13) vis-à-vis two electrodes (7,8) form a corridor (17) for air circulation which extends from an aperture (15) of an electrode to the a journey (15) vis-à-vis the other electrode.
  • the charged particles carried in the air stream (14) are attracted and retained by the wings (13) of the electrode in relation to the terminal (10) of the power source.
  • the collection device comprises three electrodes (7,8,18), which are placed successively in the air flow.
  • a median electrode (18) is composed of two electrodes of the type of those shown in Fig.3a and Fig.3b, which are coupled to each other through their wall (12).
  • This backing is likely to be achieved by welding, gluing, pleating or other similar techniques for such a backing.
  • the openings (15) and the joining elements (16) of two backed electrodes are disposed respectively opposite each other. Such arrangements make it possible, from the same type of electrode, to optimize the particle collection surface and / or to increase the filtering power.
  • the collection device (6) comprises three electrodes (7,8,18).
  • a median electrode (18) has wings (13) which are alternately formed on its upstream face and on its downstream face.
  • the wings (13) respectively upstream and downstream of the median electrode (18) are interleaved with the wings (13) of two corresponding end electrodes (7,8), of the type illustrated in FIGS. .3b.
  • the walls (12) of the electrodes (7, 8, 18) disposed both upstream and downstream of the air flow (14) comprise perforations (15) for passing air. through them.
  • an electrode of the type shown in Fig.3a and Fig.3b is manufactured from a metal strip (19) punched and folded on itself. More particularly, in a first manufacturing step, cuts, including rectangular, are formed through the strip (19) to form the openings (15). The cuts are formed by punching the strip (19) according to an indifferently square or rectangular grid, so that the cuts are symmetrically distributed in the strip (19) in a plurality of rows and columns. Some of these cuts are arranged in overlapping fold lines (20) intended to form the flanges (13) and at a distance from flap lines (21) intended to bring together two adjacent solid areas of the strip (19) situated between the cuts. . In Fig.6, the fold lines (20, 21) are shown in broken lines.
  • the strip (19) is folded along the fold lines (20) and the flap lines (21) to form the wings (13) of the electrode, the solid portion of the strip (19) between two columns of cuts being folded on itself along the flap line (21).
  • two identical electrodes (7,8) performed according to the folding method described above are nested one inside the other to form a collection device such as that shown in Fig.3a and Fig.3b. Note that these two electrodes (7,8) are identical and are made by the same method to reduce the manufacturing costs of the collection device (6).
  • the electrode is produced by extrusion of a plastic material made conductive, by charging metal particles or by applying a conductive coating.
  • the electrode may be made by extrusion of a metallic material.
  • the electrode is obtained by molding and comprises a solid wall (22) provided with wings (13) at one of its faces.
  • the wall (22) of the electrode is punched to provide the openings (15) and the connecting elements (16).
  • the electrode may be made by molding a plastic material made conductive by charging metal particles or by applying a conductive coating. In this case, the shaped electrode as illustrated in FIG. 5b is directly obtained by molding.
  • a first elementary frame (23) is equipped with two combs (24) intended to receive the wings (13) of two nested electrodes (7, ⁇ ), in order to ensure a precise positioning between them of the electrodes (7). , ⁇ ) on the one hand and wings (13) of each electrode (7, ⁇ ) on the other hand.
  • this arrangement of the first elementary frame (23) is capable of responding to a cooperation with the wings (13) of the electrodes (7, ⁇ , 1 ⁇ ) obtained according to any embodiment referred to above. These arrangements are such that the wings (13) are maintained at a precise and constant separation distance from each other, to avoid electrical discharges between them.
  • the first elementary frame (23) is formed of a unitary piece combining the combs (24), a peripheral wall (25) and stiffening ribs (26) connecting the peripheral walls (25) of the frame (23) to each other. ).
  • the combs (24) extend between two opposite edges of the elementary frame (23) according to a orthogonal direction to the wings (13) of the electrodes it receives.
  • the combs (24) advantageously constitute a mechanical reinforcing element of the frame (23) and are preferably arranged opposite the junction elements (16) of the electrodes (7, 8) to minimize the aeraulic losses.
  • the first elementary frame (23) is joined to a second elementary frame (27) to jointly form a frame-shaped support (28) which houses the two interleaved electrodes (7, 8) in its interior space. .
  • This assembly can be achieved by welding, gluing, interlocking, clipping or the like.
  • the second elementary frame (27) is preferably structurally similar to the first elementary frame (23), or is likely to be limited to pieces of structure that attach to the first elementary frame (23), such as by welding, gluing, interlocking by clipping or similar technique.
  • the frame (28) has a lumen (29) providing a passage for respective connecting members (30) of each of the electrodes (7,8), respectively to the corresponding terminal (10) of the power source (11). ) and to the mass (9).
  • Each connecting member (30) is advantageously formed in the extension of one of the connecting elements (16). Such arrangements facilitate the electrical connection of the collection device (6).
  • Fig.11 and Fig.12 are sectional representations of the device of the invention.
  • One of the elementary frames (27) is equipped with a comb (24).
  • the section is made in an area of openings (15) occupied by the comb (24).
  • the air flow (14) can not pass through the frame because of the presence of the comb (24) which partially occupies the passage of air that the openings (15) leave.
  • the cut is made in an area of the openings (15) which is not occupied by the comb (24), this zone being used for the passage of the air flow (14).
  • the two elementary frames (23,27) are each equipped with a comb (24).
  • the teeth of each comb (24) are alternately engaged on the nested wings (13) of the one and the other of the electrodes (7,8), and more precisely on the end of the wings (13) of an electrode (7) and at the base of the wings ( 13) of the other electrode (8).
  • the section is made in an area of openings (15) occupied by the combs (24). In this zone, the air flow (14) can not cross the frame because of the presence of the combs (24) which partially occupy the passage of air that the openings (15) leave.
  • the section is made in an area of openings (15) which is not occupied by the combs (24), this area being used for the passage of the air flow (14).

Landscapes

  • Electrostatic Separation (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention concerns a device (6) for collecting by electrostatic precipitation pre-charged particles carried in an air stream (14). Said device (6) comprises at least two electrodes (7, 8, 18) arranged in the air stream, said electrodes (7, 8, 18) being respectively connected to the earth (9) and to a terminal (10) of a polarized source (11). The electrodes (7, 8, 18) each consist of a wall (12) comprising holes (15), said wall (12) being arranged transversely to the air stream (14). Flanges (13) are provided at one of the surfaces of the wall (12) by being oriented parallel to the air stream (14). The wall (12) and the flanges (13) form a single unit.

Description

Dispositif de précipitation électrostatique de particules chargées et véhiculées dans un flux d'air. Device for the electrostatic precipitation of charged particles carried in an air flow.
Domaine technique de l'invention.Technical Field of the Invention
La présente invention est du domaine des dispositifs de traitement de l'air circulant à travers une installation, telle qu'une installation de ventilation, de chauffage et/ou de climatisation, notamment pour véhicule automobile. Elle a pour objet un dispositif de précipitation électrostatique de particules préalablement chargées et véhiculées dans un flux d'air circulant à l'intérieur d'une telle installation.The present invention is in the field of air treatment devices circulating through an installation, such as a ventilation, heating and / or air conditioning installation, in particular for a motor vehicle. It relates to a device for electrostatic precipitation of particles previously charged and conveyed in a flow of air circulating inside such an installation.
Etat de la technique.State of the art
On connaît des appareils électrostatiques équipant une installation à l'intérieur de laquelle circule un flux d'air. Ces appareils sont susceptibles d'être utilisés pour assainir l'air circulant à l'intérieur d'une installation de ventilation, de chauffage et/ou de climatisation, notamment pour véhicule automobile. De tels appareils sont organisés pour retenir des particules présentes dans le flux d'air, telles que des particules de poussière, de fumée ou analogues. Ces appareils associent notamment un dispositif destiné à charger électriquement les particules présentes dans le flux d'air, avec un dispositif de collecte des particules chargées. Le dispositif de collecte est placé dans le flux d'air en aval du dispositif de charge, pour retenir par précipitation électrostatique les particules préalablement chargées.Electrostatic devices are known equipment equipping an installation inside which circulates a flow of air. These devices are likely to be used to sanitize the air circulating inside a ventilation, heating and / or air conditioning, especially for a motor vehicle. Such apparatuses are organized to retain particles present in the airflow, such as particles of dust, smoke or the like. These devices include a device for electrically charging particles in the air flow, with a charged particle collection device. The collection device is placed in the airstream downstream of the charging device, to retain by electrostatic precipitation the previously charged particles.
Le dispositif de charge est par exemple de type corona et comprend un couple d'électrodes respectivement reliées à l'une des bornes d'une source d'alimentation électrique polarisée. Les particules présentes dans le flux d'air circulent entre les électrodes qui délivrent une décharge haute tension, indifféremment positive ou négative. Cette décharge produit des ions qui entrent en collision avec les particules et les chargent électriquement. Le dispositif de collecte est par exemple constitué d'un filtre à fibres non tissées, tel qu'un feutre, dont les fibres sont chargées d'une polarité inverse à celle appliquée aux particules par le dispositif de charge, pour provoquer leur précipitation sur les fibres. Un inconvénient relatif à un tel dispositif de collecte réside dans l'affaiblissement de la charge des fibres, qui diminue au fur et à mesure que le filtre retient les particules. Ce type de dispositif de collecte présente une pérennité et une efficacité insuffisante.The charging device is for example of the corona type and comprises a pair of electrodes respectively connected to one of the terminals of a polarized power source. The particles present in the air flow circulate between the electrodes which deliver a high voltage discharge, indifferently positive or negative. This discharge produces ions that collide with the particles and charge them electrically. The collection device consists for example of a non-woven fiber filter, such as a felt, whose fibers are charged with a polarity opposite to that applied to the particles by the charging device, to cause their precipitation on the fibers. fibers. A disadvantage relating to such a collection device lies in the weakening of the fiber load, which decreases as the filter retains the particles. This type of collection device has a durability and insufficient efficiency.
Pour remédier à cet inconvénient, il a été proposé de disposer le filtre entre deux électrodes pour recharger les fibres. Cependant le filtre est rapidement colmaté, ce qui induit des pertes aérauliques, et affecte l'efficacité et la pérennité du dispositif.To remedy this drawback, it has been proposed to arrange the filter between two electrodes for recharging the fibers. However, the filter is quickly clogged, which induces aeraulic losses, and affects the efficiency and durability of the device.
II a été proposé par les documents GB1559629 (NISSAN MOTOR), JP6247139 (ZEXEL CORP), JP62122820 (NISSAN MOTOR) et US4166729 (US NAVY) d'organiser le dispositif de collecte à partir d'une pluralité d'électrodes conformées en plaques, qui sont disposées parallèlement entre elles et dont le plan général est orienté parallèlement au flux d'air. Typiquement, un tel dispositif de collecte comporte plusieurs dizaines de plaques espacées les unes des autres d'une distance de l'ordre de quelques millimètres. Les plaques sont alternativement reliées à la masse et la borne d'une source d'alimentation électrique de polarité inverse à celle appliquée aux particules par le dispositif de charge. Les particules chargées véhiculées dans le flux d'air sont attirées, puis retenues à la surface des plaques reliées à la borne de ladite source.It has been proposed by GB1559629 (NISSAN MOTOR), JP6247139 (ZEXEL CORP), JP62122820 (NISSAN MOTOR) and US4166729 (US NAVY) to organize the collection device from a plurality of electrodes shaped into plates, which are arranged parallel to each other and whose general plane is oriented parallel to the flow of air. Typically, such a collection device comprises several tens of plates spaced from each other by a distance of the order of a few millimeters. The plates are alternately connected to ground and the terminal of a power source of polarity reversed to that applied to the particles by the charging device. The charged particles conveyed in the air flow are attracted and then retained on the surface of the plates connected to the terminal of said source.
Un problème à résoudre réside dans l'organisation du dispositif de collecte qui doit permettre sa production rapide et à faible coût, sans néanmoins porter atteinte ni à sa pérennité ni à son efficacité, et qui doit être d'un encombrement limité. Plus particulièrement, le dispositif de collecte doit être réalisé à partir d'un nombre restreint de pièces pour réduire ses coûts d'obtention et de montage. Le positionnement des électrodes doit être précis pour éviter des décharges électriques entre elles. Cette précision doit être obtenue de manière simple pour ne pas accroître ni la complexité du dispositif, ni le nombre de pièces le composant, ni la difficulté de son montage. En outre, le raccordement électrique des électrodes doit être réalisé de manière simple, en limitant le câblage nécessaire.A problem to be solved lies in the organization of the collection device which must allow its rapid production and low cost, without affecting its durability or its effectiveness, and which must be of limited size. More particularly, the collection device must be made from a small number of parts to reduce its costs of obtaining and mounting. The positioning of the electrodes must be precise to avoid discharges between them. This accuracy must be obtained in a simple way to not increase the complexity of the device, the number of parts or the difficulty of its assembly. In addition, the electrical connection of the electrodes must be achieved in a simple manner, limiting the necessary wiring.
Objet de l'invention.Object of the invention
Le but de la présente invention est de proposer un dispositif de collecte par précipitation électrostatique de particules préalablement chargées et véhiculées dans un flux d'air, ce dispositif étant destiné à équiper une installation à travers laquelle circule le flux d'air. La présente invention a aussi pour objet une installation équipée d'un tel dispositif de collecte, et plus particulièrement une installation de ventilation, de chauffage et/ou de climatisation, d'un véhicule notamment. Il est plus particulièrement visé de proposer un tel dispositif de collecte dont le fonctionnement est pérenne et efficace, qui présente un faible encombrement et qui est réalisé à partir d'un nombre restreint de pièces dont le montage est aisé et rapide, pour notamment permettre la fabrication du dispositif à un coût compétitif et éventuellement pour faciliter ses opérations de maintenance et d'entretien.The object of the present invention is to provide a collection device by electrostatic precipitation of particles previously charged and conveyed in an air flow, this device being intended to equip an installation through which circulates the air flow. The present invention also relates to an installation equipped with such a collection device, and more particularly to a ventilation, heating and / or air conditioning, including a vehicle. It is more particularly intended to provide such a collection device whose operation is durable and efficient, which has a small footprint and which is made from a small number of parts whose assembly is easy and fast, in particular to allow the manufacture of the device at a competitive cost and possibly to facilitate its maintenance and maintenance operations.
Le dispositif de la présente invention est un dispositif de collecte par précipitation électrostatique de particules préalablement chargées et véhiculées dans un flux d'air. Ce dispositif comprend au moins deux électrodes disposées dans le flux d'air, ces électrodes étant alternativement reliées à la masse et à une borne d'une source polarisée.The device of the present invention is a collection device by electrostatic precipitation of particles previously charged and conveyed in an air flow. This device comprises at least two electrodes arranged in the air flow, these electrodes being alternately connected to the ground and to a terminal of a polarized source.
Selon la présente invention, un tel dispositif est principalement reconnaissable en ce que lesdites électrodes sont chacune constituées d'une paroi comportant des ajours, à l'une au moins des faces de laquelle paroi sont ménagées des ailes, les ailes de l'électrode reliée à la borne collectant les particules préalablement chargées. Grâce à ces dispositions, la structure des électrodes est simplifiée et leur installation à l'intérieur du dispositif est rendue aisée. Plus particulièrement, les ailes de collecte des particules sont rassemblées sur un même élément, qui est susceptible d'être facilement réalisé à partir d'une opération unique de fabrication, et dont le montage à l'intérieur du dispositif est rendu aisé par son caractère monobloc reliant entre elles les différentes ailes des électrodes.According to the present invention, such a device is mainly recognizable in that said electrodes each consist of a wall comprising openings, at least one of whose faces walls are formed with wings, the wings of the connected electrode. at the terminal collecting the previously charged particles. Thanks to these provisions, the structure of the electrodes is simplified and their installation inside the device is made easy. More particularly, the particle collecting flanges are assembled on the same element, which is likely to be easily made from a single manufacturing operation, and whose mounting inside the device is made easy by its character. monobloc interconnecting the different wings of the electrodes.
Plus particulièrement, la paroi est disposée transversalement au flux d'air, les ailes étant orientées sensiblement parallèlement à ce dernier. Les ajours ménagés à travers la paroi permettent le passage du flux d'air en limitant les pertes aérauliques, tandis que les ailes sont susceptibles de s'étendre autant que de besoin parallèlement au flux d'air pour collecter les particules.More particularly, the wall is disposed transversely to the air flow, the wings being oriented substantially parallel to the latter. The openings formed through the wall allow the passage of the air flow by limiting the aeraulic losses, while the wings are likely to extend as much as necessary parallel to the air flow to collect the particles.
Les ailes sont de préférence reliées entre elles par des éléments de jonction matérialisant la paroi. Les ajours s'étendent entre deux éléments de jonction successifs. Plus précisément, la paroi est formée à partir des éléments de jonction, qui s'étendent d'une aile à l'autre pour les relier transversalement entre elles. Plusieurs éléments de jonction sont préférentiellement utilisés en étant répartis longitudinalement le long des ailes, les ajours étant ménagés entre eux. Ces dispositions sont telles que les éléments de jonction sont susceptibles de présenter une surface réduite à rencontre de la circulation de l'air, la surface complémentaire formée par les ajours laissant un libre passage à l'air en réduisant au mieux les pertes aérauliques, sans pour autant porter atteinte à la robustesse de la jonction des ailes entre elles.The wings are preferably interconnected by junction elements embodying the wall. The openings extend between two successive joining elements. More specifically, the wall is formed from the connecting elements, which extend from one wing to the other to connect them transversely to each other. Several connecting elements are preferably used by being distributed longitudinally along the wings, the openings being formed between them. These provisions are such that the connecting elements are likely to have a reduced surface against the flow of air, the complementary surface formed by the openings leaving a free passage to the air by reducing air losses as best as possible, without to undermine the robustness of the junction of the wings between them.
La paroi et les ailes composant l'électrode forment avantageusement une pièce unitaire. Une telle pièce unitaire peut être facilement réalisée par des procédés d'obtention mécanique ou par moulage d'une matière plastique.The wall and the wings forming the electrode advantageously form a unitary piece. Such a unitary piece can be easily made by mechanical production methods or by molding a plastic material.
De préférence; le dispositif comporte au moins un couple d'électrodes dont les parois sont disposées en vis-à-vis. Les ailes sont imbriquées d'une électrode à l'autre. Plus précisément, les parois sont disposées parallèlement en face l'une de l'autre, les ailes d'une paroi étant disposées dans l'espace compris entre deux ailes de l'autre paroi. L'une de ces électrodes est plus particulièrement reliée à la masse, tandis que l'autre est reliée à la borne d'une source électrique. polarisée, notamment d'une polarité inverse à celle utilisée pour le chargement électrique préalable des particules. Ces dispositions permettent de mettre en œuvre des surfaces conséquentes de collecte des particules, tout en réduisant l'encombrement général du dispositif.Preferably; the device comprises at least one pair of electrodes whose walls are arranged vis-à-vis. The wings are nested with an electrode the other. More specifically, the walls are arranged parallel opposite each other, the wings of a wall being arranged in the space between two wings of the other wall. One of these electrodes is more particularly connected to ground, while the other is connected to the terminal of an electrical source. polarized, in particular of a reverse polarity to that used for the prior electric charging of the particles. These provisions make it possible to implement large areas of particle collection, while reducing the overall size of the device.
Selon une variante de réalisation, le dispositif comporte au moins trois électrodes successives, une électrode médiane comportant des ailes à chacune de ses faces qui sont imbriquées avec les ailes d'électrodes d'extrémité. L'électrode médiane est plus particulièrement reliée à la masse et/ou la borne d'une source électrique polarisée, notamment d'une polarité inverse à celle utilisée pour le chargement électrique préalable des particules, tandis que les deux autres électrodes sont inversement reliées à la borne d'une source électrique polarisée, notamment d'une polarité inverse à celle utilisée pour le chargement électrique préalable des particules, et/ou à la masse. L'électrode médiane est susceptible d'être réalisée à partir d'un couple de feuillards assemblés l'un à l'autre par l'intermédiaire de leur paroi placée dos à dos, ou encore à partir d'un même feuillard plié pour former des ailes s'étendant de part et d'autre de la paroi. L'électrode médiane est aussi susceptible d'être formée par moulage d'une matière plastique, en étant rendue conductrice par revêtement d'une matière métallique ou par charge par exemple.According to an alternative embodiment, the device comprises at least three successive electrodes, a median electrode having wings at each of its faces which are interleaved with the end electrode wings. The median electrode is more particularly connected to the ground and / or the terminal of a polarized electrical source, in particular of a reverse polarity to that used for the prior electric charge of the particles, whereas the other two electrodes are inversely connected to the terminal of a polarized electrical source, in particular of a reverse polarity to that used for the prior electric charging of the particles, and / or to ground. The median electrode is capable of being made from a pair of strips assembled to one another via their wall placed back to back, or from the same folded strip to form wings extending on both sides of the wall. The median electrode is also capable of being formed by molding a plastic material, being rendered conductive by coating a metal material or by load for example.
De préférence, les électrodes sont maintenues dans le plan général de leur paroi à l'intérieur d'un support, tel que conformé en cadre. Ce cadre est avantageusement composé de deux cadres élémentaires assemblés l'un à l'autre, entre lesquels sont maintenues les électrodes.Preferably, the electrodes are held in the general plane of their wall inside a support, as shaped in frame. This frame is advantageously composed of two elementary frames assembled to one another, between which the electrodes are held.
Le dispositif comporte préférentiellement au moins un organe de maintien des ailes d'au moins une électrode à une distance de consigne séparant les ailes les unes des autres. Ces dispositions visent à garantir une fiabilité et une pérennité du maintien à une distance précise et constante de séparation des ailes les unes des autres.The device preferably comprises at least one member for maintaining the wings of at least one electrode at a set distance separating the wings from each other. These provisions are intended to ensure reliability and durability maintaining a precise and constant separation distance of the wings from each other.
L'organe de maintien est avantageusement conformé en peigne. Les dents du peigne sont susceptibles d'être en prise sur les éléments de jonction, et/ou sur les ailes.The holding member is advantageously shaped as a comb. The teeth of the comb are likely to be engaged on the connecting elements, and / or on the wings.
Selon une variante de réalisation, les dents du peigne sont en prise alternativement sur deux électrodes à ailes imbriquées. Plus particulièrement, les dents du peigne sont en prise sur les ailes de chacune des électrodes dans la zone des ajours que comporte la paroi de l'une des électrodes.According to an alternative embodiment, the teeth of the comb are engaged alternately on two nested wing electrodes. More particularly, the teeth of the comb are engaged on the wings of each of the electrodes in the zone of the openings that comprises the wall of one of the electrodes.
De préférence, le dispositif comporte au moins un couple de peignes, qui sont respectivement chacun en prise en bout des ailes d'une électrode et à la base des ailes de l'autre électrode.Preferably, the device comprises at least one pair of combs, each of which is respectively engaged with the wings of one electrode and with the base of the wings of the other electrode.
Avantageusement, l'organe de maintien constitue en outre un organe d'assemblage des électrodes au cadre, pour favoriser la qualité de la jonction entre les électrodes et le cadre. De préférence, l'organe de maintien est ménagé sur au moins l'un des cadres élémentaires, avec lequel il forme avantageusement une pièce unitaire, obtenue par moulage d'une matière plastique électriquement isolante notamment.Advantageously, the holding member also constitutes an assembly member of the electrodes to the frame, to promote the quality of the junction between the electrodes and the frame. Preferably, the holding member is formed on at least one of the elementary frames, with which it advantageously forms a unitary piece, obtained by molding an electrically insulating plastic material in particular.
La paroi est avantageusement munie d'un organe de raccordement électrique. Il ressort de ces dispositions que la pluralité d'ailes que comporte l'électrode sont conjointement alimentées par l'intermédiaire de la paroi, et plus particulièrement par l'intermédiaire des éléments de jonction, à partir d'un même organe de raccordement électrique. Le cadre comporte notamment au moins une lumière à travers laquelle émerge l'organe de raccordement équipant chacune des électrodes. Le dispositif de collecte est susceptible d'être associé à un pulseur générateur du flux d'air et d'être disposé en aval d'un dispositif de charge des particules.The wall is advantageously provided with an electrical connection member. It follows from these provisions that the plurality of wings that comprises the electrode are jointly supplied via the wall, and more particularly via the connecting elements, from a single electrical connection member. The frame includes in particular at least one light through which emerges the connecting member fitted to each of the electrodes. The collection device is capable of being associated with a pulsator generating the air flow and of being disposed downstream of a device for charging the particles.
Selon une première variante, le dispositif de collecte et le dispositif de charge forment un ensemble unique logé dans un boîtier commun, ce boîtier de préférence logeant en outre le pulseur. Un tel boîtier est susceptible d'être utilisable indépendamment pour assainir l'air occupant un espace, tel que l'habitacle d'un véhicule. Ledit boîtier est aussi susceptible d'être celui d'une installation de ventilation, de chauffage et/ou de climatisation, d'un véhicule notamment. Le dispositif de collecte est préférentiellement placé en entrée d'air de l'installation, en aval du dispositif de charge.According to a first variant, the collection device and the charging device form a single unit housed in a common housing, this housing preferably housing the blower. Such a housing can be used independently to clean the air occupying a space, such as the passenger compartment of a vehicle. Said housing is also likely to be that of a ventilation system, heating and / or air conditioning, including a vehicle. The collection device is preferably placed in the air inlet of the installation, downstream of the charging device.
Selon une deuxième variante, le dispositif de collecte et le dispositif de charge sont formés d'ensembles distincts logés dans des boîtiers respectifs en communication aéraulique pour le passage du flux d'air de l'un à l'autre des boîtiers.According to a second variant, the collection device and the charging device are formed of separate assemblies housed in respective housings in aeraulic communication for the passage of the air flow from one to the other of the housings.
Selon un premier mode d'obtention d'une électrode d'un dispositif de collecte de l'invention, celle-ci est formée à partir d'un feuillard poinçonné pour ménager les ajours, puis replié dans son plan général pour former les ailes.According to a first method of obtaining an electrode of a collection device of the invention, it is formed from a punched strip to arrange the openings, and then folded in its general plane to form the wings.
Selon un deuxième mode d'obtention d'une électrode d'un dispositif de collecte de l'invention, celle-ci est formée par moulage d'un matériau plastique rendu conducteur.According to a second method of obtaining an electrode of a collection device of the invention, it is formed by molding a plastic material made conductive.
Selon un troisième mode d'obtention d'une électrode d'un dispositif de collecte de l'invention, celle-ci est formée par extrusion d'un matériau plastique rendu conducteur.According to a third method of obtaining an electrode of a collection device of the invention, it is formed by extrusion of a plastic material made conductive.
Ledit matériau plastique est par exemple rendu conducteur par adjonction d'une charge métallique, ou par application d'un revêtement, métallique notamment. Selon. un quatrième mode d'obtention d'une électrode d'un dispositif de collecte de l'invention, celle-ci est formée par extrusion d'un matériau métallique.Said plastic material is for example made conductive by adding a metal filler, or by applying a coating, especially metal. According. a fourth method of obtaining an electrode of a collection device of the invention, it is formed by extrusion of a metal material.
Description des figures.Description of the figures.
La présente invention sera mieux comprise, et des détails en relevant apparaîtront, à la lecture de la description qui va en être faite en relation avec les figures des planches annexées, dans lesquelles : La fig.1 est une vue schématique en coupe d'un boîtier logeant un dispositif de collecte selon l'invention.The present invention will be better understood, and details will arise from reading the description which will be made in connection with the figures of the attached plates, in which: Figure 1 is a schematic sectional view of a housing housing a collection device according to the invention.
La fig.2 est une vue schématique en perspective d'une première variante de réalisation d'une électrode participante du dispositif de collecte illustré sur Ia fig.1. Les fig.3a et fig.3b sont des vues schématiques en coupe prise respectivement dans la zone des ajours et dans la zone des éléments de jonction que comportent les électrodes participantes du dispositif de collecte illustré sur la fig.1.FIG. 2 is a diagrammatic perspective view of a first variant embodiment of a participating electrode of the collection device illustrated in FIG. FIGS. 3a and 3b are diagrammatic sectional views taken respectively in the area of the openings and in the area of the joining elements that comprise the participating electrodes of the collection device illustrated in FIG.
Les fig.4a et fig.4b sont des vues schématiques en coupe prise respectivement dans la zone des ajours et dans la zone des éléments de jonction que comportent les électrodes participantes d'un dispositif de collecte selon une deuxième variante de l'invention. Les fig.δa et fig.δb sont des vues schématiques en coupe prise respectivement dans la zone des ajours et dans la zone des éléments de jonction que comportent des électrodes participantes d'un dispositif de collecte selon une troisième variante de l'invention. La fig.6 est une vue schématique à plat d'un feuillard à partir duquel est réalisée une électrode illustrée sur là fig.2.FIGS. 4a and 4b are diagrammatic sectional views taken respectively in the area of the openings and in the area of the joining elements that comprise the participating electrodes of a collection device according to a second variant of the invention. FIGS. 5a and 5b are diagrammatic cross-sectional views taken respectively in the area of the openings and in the area of the joining elements that comprise participating electrodes of a collection device according to a third variant of the invention. Fig.6 is a schematic plan view of a strip from which is made an electrode shown in fig.2.
Les fig.7a à fig.7f sont des vues schématiques en coupe du feuillard illustré sur la fig.6 à différentes étapes d'un premier procédé de fabrication du dispositif de collecte.Fig.7a to Fig.7f are schematic sectional views of the strip illustrated in Fig.6 at different stages of a first method of manufacturing the collection device.
Les fig.δa à fig.δb sont des vues schématiques en perspective de différentes étapes de réalisation d'une électrode illustrée sur la fig.2 selon un deuxième procédé de fabrication. La fig.9 est une vue schématique en perspective d'un cadre élémentaire destiné à recevoir des électrodes illustrées sur la fig.2.FIGS. 5a to FIG. 5B are diagrammatic perspective views of different steps of producing an electrode illustrated in FIG. 2 according to a second manufacturing method. Fig.9 is a schematic perspective view of a basic frame for receiving electrodes shown in Fig.2.
La fig.1O est une vue schématique en perspective d'un cadre équipée d'un couple d'électrodes illustrées sur la fig.2. Les fig.11 et fig.12 sont des vues schématiques en coupe partielle d'un cadre illustré sur la fig.1O, respectivement ménagées à travers d'ajours et d'éléments de jonction de deux électrodes imbriquées selon une première forme de réalisation du dispositif de collecte.FIG. 10 is a diagrammatic perspective view of a frame equipped with a pair of electrodes illustrated in FIG. FIGS. 11 and 12 are diagrammatic views in partial section of a frame illustrated in FIG. 10, respectively formed through perforations and joining elements of two interleaved electrodes according to a first embodiment of FIG. collection device.
Les fig.13 et fig.14 sont des vues schématiques en coupe partielle d'un cadre illustré sur la fig.1O, respectivement ménagées à travers d'ajours et d'éléments de jonction de deux électrodes imbriquées selon une deuxième forme de réalisation du dispositif de collecte.FIGS. 13 and 14 are diagrammatic views in partial section of a frame illustrated in FIG. 10, respectively formed through perforations and joining elements of two interleaved electrodes according to a second embodiment of FIG. collection device.
Sur la fig.1 , un boîtier (1) loge un appareil électrostatique destiné à assainir un flux d'air circulant à son travers. Ledit appareil est plus particulièrement destiné à retenir par précipitation électrostatique des particules véhiculées par le flux d'air, tels que des particules de poussière, et empêcher leur rejet à l'extérieur du boîtier (1). Le boîtier . (1) loge un pulseur (2) pour faire circuler à travers l'appareil électrostatique l'air admis dans le boîtier (1) depuis une entrée d'air (3), ménagée dans ce dernier en amont du pulseur (2), vers une sortie d'air (4) ménagée dans le boîtier (1) en aval du pulseur (2). Le boîtier (1) est susceptible d'être celui d'une installation de ventilation, de chauffage et/ou de climatisation, d'un véhicule automobile notamment. Dans ce cas, le pulseur (2) est indifféremment celui de l'installation ou un pulseur additionnel. Dans ce cas encore, l'appareil électrostatique est préférentiellement placé en entrée d'air (3) de l'installation, ou dans le système de ventilation, de chauffage et/ou de climatisation, indifféremment en amont ou en aval du pulseur (2). Le boîtier (1 ) est aussi susceptible d'être un boîtier autonome placé dans l'habitacle pour assainir l'air contenu dans ce dernier.In Fig.1, a housing (1) houses an electrostatic device for sanitizing a flow of air flowing therethrough. Said apparatus is more particularly intended to retain by electrostatic precipitation particles carried by the air flow, such as dust particles, and prevent their rejection outside the housing (1). The box . (1) houses a blower (2) for circulating through the electrostatic apparatus the air admitted into the housing (1) from an air inlet (3) formed in the latter upstream of the blower (2), to an air outlet (4) in the housing (1) downstream of the blower (2). The housing (1) is likely to be that of a ventilation system, heating and / or air conditioning, including a motor vehicle. In this case, the blower (2) is indifferently that of the installation or an additional blower. In this case again, the electrostatic apparatus is preferably placed in the air inlet (3) of the installation, or in the ventilation system, heating and / or air conditioning, indifferently upstream or downstream of the blower (2 ). The housing (1) is also likely to be a stand-alone housing placed in the passenger compartment to clean the air contained therein.
L'appareil électrostatique comprend un dispositif (5), tel qu'un chargeur de type corona, qui est destiné à charger les particules véhiculées par le flux d'air et un dispositif (6) destiné à collecter les particules préalablement chargées, qui est disposé dans le flux d'air en aval du dispositif de charge (5). Ce chargeur de type corona comprend plus particulièrement un couple d'électrodes respectivement reliées à l'une des bornes d'une source d'alimentation électrique polarisée. Les particules présentes dans le flux d'air circulent entre les électrodes qui délivrent une décharge haute tension, indifféremment positive ou négative. Cette décharge produit des ions qui entrent en collision avec les particules et les chargent électriquement.The electrostatic apparatus comprises a device (5), such as a corona type charger, which is intended to charge particles carried by the air flow and a device (6) for collecting the previously charged particles, which is arranged in the airstream downstream of the charging device (5). This corona type charger more particularly comprises a pair of electrodes respectively connected to one of the terminals of a polarized power source. The particles present in the air flow circulate between the electrodes which deliver a high voltage discharge, indifferently positive or negative. This discharge produces ions that collide with the particles and charge them electrically.
Sur la variante de réalisation du dispositif de collecte (6) illustré sur la fig.1 , celui- ci comporte deux électrodes (7,8) disposées dans le boîtier (1) en vis-à-vis l'une de l'autre. Une première électrode (7) est reliée à la masse (9), tandis qu'une deuxième électrode (8) est reliée à l'une des bornes (10) d'une source d'alimentation polarisée (11), et plus particulièrement à une borne de polarité inverse à celle appliquée aux particules par le dispositif de charge (5). Les particules véhiculées dans le flux d'air, préalablement chargées par le dispositif de charge (5), sont attirées puis retenues par la deuxième électrode (8), pour éviter leur rejet hors du boîtier (1). Selon différentes formes de réalisation, le chargeur et le collecteur peuvent appartenir à un ensemble unique, en étant notamment regroupés dans un même boîtier, ou encore être organisés en deux ensembles dissociés.In the variant embodiment of the collecting device (6) illustrated in FIG. 1, the latter comprises two electrodes (7, 8) arranged in the housing (1) facing each other . A first electrode (7) is connected to the ground (9), while a second electrode (8) is connected to one of the terminals (10) of a polarized power source (11), and more particularly to a terminal of inverse polarity to that applied to the particles by the charging device (5). The particles conveyed in the air stream, previously loaded by the charging device (5), are attracted and then retained by the second electrode (8) to prevent their rejection from the housing (1). According to different embodiments, the charger and the collector can belong to a single set, in particular being grouped together in the same box, or else be organized in two separate sets.
Sur la fig.2, une électrode est constituée d'une paroi (12) à l'une des faces de laquelle son ménagées des ailes (13) de faible épaisseur. Ces ailes (13) sont orientées orthogonalement à la paroi (12) et parallèlement entre elles. Deux ailes (13) voisines sont espacées l'une de l'autre d'une distance de l'ordre de quelques millimètres. La paroi (12) est disposée dans le boîtier (1) orthogonalement. à la direction de circulation du flux d'air (14) de sorte que les ailes (13) s'étendent parallèlement à cette direction. Pour permettre au flux d'air de passer de part et d'autre de la paroi (12), cette dernière comporte des ajours (15) ménagés à son travers. Ces ajours (15) occupent la majeure partie de la surface de la paroi (12) et s'étendent transversalement entre deux ailes (13) adjacentes. Des éléments de jonction (16) des ailes (13) entre elles matérialisent la paroi (12). La surface cumulée des éléments de jonction (16) est très inférieure à la surface cumulée des ajours (15), pour optimiser le passage du flux d'air à travers la paroi (12) et limiter les pertes aérauliques. La surface cumulée des éléments de jonction (16) est juste nécessaire pour conférer à l'électrode une tenue mécanique satisfaisante. Une telle électrode présente une importante surface de collecte des particules pour un encombrement réduit, son installation dans le dispositif de collecte (6) est réalisée à partir de la mise en place d'une seule pièce, qui associe la paroi (12) composée des éléments de jonction (16), et des ailes (13) assemblées entre elles par ces derniers.In FIG. 2, an electrode consists of a wall (12) at one of the faces of which there are wings (13) of small thickness. These wings (13) are oriented orthogonally to the wall (12) and parallel to each other. Two neighboring wings (13) are spaced from each other by a distance of the order of a few millimeters. The wall (12) is disposed in the housing (1) orthogonally. to the flow direction of the air flow (14) so that the wings (13) extend parallel to this direction. To allow the flow of air to pass on both sides of the wall (12), the latter comprises openings (15) formed therethrough. These openings (15) occupy most of the surface of the wall (12) and extend transversely between two wings (13) adjacent. Elements of junction (16) of the wings (13) between them materialize the wall (12). The cumulative surface of the junction elements (16) is much smaller than the cumulative surface of the openings (15), to optimize the passage of the air flow through the wall (12) and limit the aeraulic losses. The cumulative surface of the joining elements (16) is just necessary to give the electrode a satisfactory mechanical strength. Such an electrode has a large particle collection surface for a small footprint, its installation in the collection device (6) is made from the implementation of a single piece, which associates the wall (12) composed of connecting elements (16), and wings (13) joined together by them.
Sur les fig.3a et fig.3b, le dispositif de collecte (6) comporte un couple d'électrodes (7,8) telles que celle illustrée sur la fig.2. Les ailes (13) respectives des deux électrodes (7,8) sont imbriquées les unes dans les autres de sorte qu'une aile (13) d'une électrode soit interposée entre deux ailes (13) adjacentes d'une autre électrode. Les parois (12) des deux électrodes (7,8) sont parallèles entre elles, les éléments de jonction (16) et les ajours (15) respectifs qu'elles comportent étant placés en vis-à-vis les uns des autres. Une telle disposition des éléments de jonction (16) et des ajours (15) minimise les pertes aérauliques. Les ailes (13) en vis-à-vis de deux électrodes (7,8) forment un couloir (17) de circulation d'air qui s'étend depuis un ajour (15) d'une électrode jusqu'à l'ajour (15) en vis-à-vis de l'autre électrode. Les particules chargées véhiculées dans le flux d'air (14) sont attirées et retenues par les ailes (13) de l'électrode en relation avec la borne (10) de la source d'alimentation.In fig.3a and fig.3b, the collection device (6) comprises a pair of electrodes (7,8) such as that illustrated in fig.2. The respective wings (13) of the two electrodes (7, 8) are nested one inside the other so that a wing (13) of an electrode is interposed between two adjacent wings (13) of another electrode. The walls (12) of the two electrodes (7,8) are parallel to one another, the junction elements (16) and the respective openings (15) which they comprise being placed opposite each other. Such an arrangement of the junction elements (16) and openings (15) minimizes the aeraulic losses. The wings (13) vis-à-vis two electrodes (7,8) form a corridor (17) for air circulation which extends from an aperture (15) of an electrode to the ajour (15) vis-à-vis the other electrode. The charged particles carried in the air stream (14) are attracted and retained by the wings (13) of the electrode in relation to the terminal (10) of the power source.
Sur les fig.4a et fig.4b, le dispositif de collecte comporte trois électrodes (7,8,18), qui sont placées successivement dans le flux d'air. Une électrode médiane (18) est composée de deux électrodes du type de celles représentées sur les fig.3a et fig.3b, qui sont adossées l'une à l'autre par l'intermédiaire de leur paroi (12). Cet adossement est susceptible d'être réalisé par soudage, par collage, par plissage ou autres techniques analogues permettant un tel adossement. De préférence, les ajours (15) et les éléments de jonction (16) de deux électrodes adossées sont disposés en regard respectivement les uns sur les autres. De telles dispositions permettent, à partir d'un même type d'électrode d'optimiser la surface de collecte des particules et/ou d'augmenter la puissance de filtrage.In fig.4a and fig.4b, the collection device comprises three electrodes (7,8,18), which are placed successively in the air flow. A median electrode (18) is composed of two electrodes of the type of those shown in Fig.3a and Fig.3b, which are coupled to each other through their wall (12). This backing is likely to be achieved by welding, gluing, pleating or other similar techniques for such a backing. Preferably, the openings (15) and the joining elements (16) of two backed electrodes are disposed respectively opposite each other. Such arrangements make it possible, from the same type of electrode, to optimize the particle collection surface and / or to increase the filtering power.
Sur les fig.δa et fig.δb, le dispositif de collecte (6) comporte trois électrodes (7,8,18). Une électrode médiane (18) comporte des ailes (13) qui sont alternativement ménagées à sa face amont et à sa face aval. Les ailes (13) respectivement amont et aval de l'électrode médiane (18) sont imbriquées avec les ailes (13) de deux électrodes d'extrémité correspondantes (7,8), du type de celles illustrées sur les fig.3a et fig.3b.In fig.δa and fig.δb, the collection device (6) comprises three electrodes (7,8,18). A median electrode (18) has wings (13) which are alternately formed on its upstream face and on its downstream face. The wings (13) respectively upstream and downstream of the median electrode (18) are interleaved with the wings (13) of two corresponding end electrodes (7,8), of the type illustrated in FIGS. .3b.
Sur les fig.3a à 5b, les parois (12) des électrodes (7,8,18) disposées tant en amont qu'en aval du flux d'air (14) comprennent des ajours (15) pour laisser passer l'air à leur travers.In FIGS. 3a to 5b, the walls (12) of the electrodes (7, 8, 18) disposed both upstream and downstream of the air flow (14) comprise perforations (15) for passing air. through them.
Sur la fig.6, une électrode du type de celles représentées sur les fig.3a et fig.3b, est fabriquée à partir d'un feuillard métallique (19) poinçonné et replié sur lui- même. Plus particulièrement, dans une première étape de fabrication, des découpes, notamment rectangulaires, sont ménagées à travers le feuillard (19) pour former les ajours (15). Les découpes sont ménagées par poinçonnage du feuillard (19) selon un quadrillage indifféremment carré ou rectangulaire, de sorte que les découpes sont symétriquement réparties dans le feuillard (19) selon une pluralité de lignes et de colonnes. Certaines de ces découpes sont ménagées en chevauchement de lignes de pliage (20) destinées à former les ailes (13) et à distance de lignes de rabat (21) destinées au rapprochement de deux zones pleines adjacentes du feuillard (19) situées entre les découpes. Sur la fig.6, les lignes de pliage (20,21) sont illustrées en traits interrompus.In Fig.6, an electrode of the type shown in Fig.3a and Fig.3b, is manufactured from a metal strip (19) punched and folded on itself. More particularly, in a first manufacturing step, cuts, including rectangular, are formed through the strip (19) to form the openings (15). The cuts are formed by punching the strip (19) according to an indifferently square or rectangular grid, so that the cuts are symmetrically distributed in the strip (19) in a plurality of rows and columns. Some of these cuts are arranged in overlapping fold lines (20) intended to form the flanges (13) and at a distance from flap lines (21) intended to bring together two adjacent solid areas of the strip (19) situated between the cuts. . In Fig.6, the fold lines (20, 21) are shown in broken lines.
Sur les fig.7a à fig.7e, le feuillard (19) est plié selon les lignes de pliage (20) et les lignes de rabat (21) pour former les ailes (13) de l'électrode, la partie pleine du feuillard (19) entre deux colonnes de découpes étant rabattue sur elle-même le long de la ligne de rabat (21). Sur la fig.7f, deux électrodes identiques (7,8) réalisées selon le procédé de pliage décrit précédemment, sont imbriquées l'une dans l'autre pour former un dispositif de collecte tel que celui représenté sur les fig.3a et fig.3b. On notera que ces deux électrodes (7,8) sont identiques et sont réalisées selon le même procédé pour diminuer les coûts de fabrication du dispositif de collecte (6).In Fig.7a to Fig.7e, the strip (19) is folded along the fold lines (20) and the flap lines (21) to form the wings (13) of the electrode, the solid portion of the strip (19) between two columns of cuts being folded on itself along the flap line (21). In fig.7f, two identical electrodes (7,8) performed according to the folding method described above, are nested one inside the other to form a collection device such as that shown in Fig.3a and Fig.3b. Note that these two electrodes (7,8) are identical and are made by the same method to reduce the manufacturing costs of the collection device (6).
Sur la fig.δa, l'électrode est réalisée par extrusion d'une matière plastique rendue conductrice, par charge de particules métalliques ou par l'application d'un revêtement conducteur. Selon une autre variante de réalisation, l'électrode est susceptible d'être réalisée par extrusion d'une matière métallique. Dans une première étape illustrée sur la fig.δa, l'électrode est obtenue par moulage et comporte une paroi pleine (22) munie des ailes (13) à l'une de ses faces. Sur la fig.8b, la paroi (22) de l'électrode est poinçonnée pour ménager les ajours (15) et les éléments de jonction (16). Selon une autre forme de réalisation, l'électrode peut être réalisée par moulage d'un matériau plastique rendu conducteur par charge de particules métalliques ou par application d'un revêtement conducteur. Dans ce cas, l'électrode conformée tel qu'illustré sur la fig.δb est directement obtenue par moulage.In FIG. 8a, the electrode is produced by extrusion of a plastic material made conductive, by charging metal particles or by applying a conductive coating. According to another variant embodiment, the electrode may be made by extrusion of a metallic material. In a first step illustrated in FIG. 8a, the electrode is obtained by molding and comprises a solid wall (22) provided with wings (13) at one of its faces. In fig.8b, the wall (22) of the electrode is punched to provide the openings (15) and the connecting elements (16). According to another embodiment, the electrode may be made by molding a plastic material made conductive by charging metal particles or by applying a conductive coating. In this case, the shaped electrode as illustrated in FIG. 5b is directly obtained by molding.
Sur la fig.9, un premier cadre élémentaire (23) est équipé de deux peignes (24) destinés à recevoir les ailes (13) de deux électrodes imbriquées (7,δ), pour garantir un positionnement précis entre elles des électrodes (7,δ) d'une part et des ailes (13) de chaque électrode (7,δ) d'autre part. On notera que cet agencement du premier cadre élémentaire (23) est susceptible de répondre à une coopération avec les ailes (13) des électrodes (7,δ,1δ) obtenues selon un quelconque mode de réalisation visé plus haut. Ces dispositions sont telles que les ailes (13) sont maintenues à une distance de séparation précise et constante les unes des autres, pour éviter des décharges électriques entre elles. Le premier cadre élémentaire (23) est formé d'une pièce unitaire associant les peignes (24), une paroi périphérique (25) et des nervures (26) de rigidification reliant les unes aux autres les parois périphériques (25) du cadre (23). Les peignes (24) s'étendent entre deux bords opposés du cadre élémentaire (23) selon une direction orthogonale aux ailes (13) des électrodes qu'il reçoit. Les peignes (24) constituent avantageusement un élément de renfort mécanique du cadre (23) et sont préférentiellement disposés en vis-à-vis des éléments de jonction (16) des électrodes (7,8) pour minimiser les pertes aérauliques.In FIG. 9, a first elementary frame (23) is equipped with two combs (24) intended to receive the wings (13) of two nested electrodes (7, δ), in order to ensure a precise positioning between them of the electrodes (7). , δ) on the one hand and wings (13) of each electrode (7, δ) on the other hand. It will be noted that this arrangement of the first elementary frame (23) is capable of responding to a cooperation with the wings (13) of the electrodes (7, δ, 1δ) obtained according to any embodiment referred to above. These arrangements are such that the wings (13) are maintained at a precise and constant separation distance from each other, to avoid electrical discharges between them. The first elementary frame (23) is formed of a unitary piece combining the combs (24), a peripheral wall (25) and stiffening ribs (26) connecting the peripheral walls (25) of the frame (23) to each other. ). The combs (24) extend between two opposite edges of the elementary frame (23) according to a orthogonal direction to the wings (13) of the electrodes it receives. The combs (24) advantageously constitute a mechanical reinforcing element of the frame (23) and are preferably arranged opposite the junction elements (16) of the electrodes (7, 8) to minimize the aeraulic losses.
Sur la fig.1O, le premier cadre élémentaire (23) est assemblé à un deuxième cadre élémentaire (27) pour former conjointement un support conformé en cadre (28), qui loge dans son volume intérieur les deux électrodes imbriquées (7,8). Cet assemblage est susceptible d'être réalisé par soudage, par collage, par emboîtement, par clipage ou analogue. Le deuxième cadre élémentaire (27) est préférentiellement structurellement similaire au premier cadre élémentaire (23), voire est susceptible de se limiter à des pièces de structure se fixant au premier cadre élémentaire (23), tel que par soudage, par collage, par emboîtement, par clipage ou technique analogue. Le cadre (28) comporte une lumière (29) ménageant un passage pour des organes de raccordement (30) respectifs de chacune des électrodes (7,8), respectivement à la borne (10) correspondante de la source d'alimentation électrique (11) et à la masse (9). Chaque organe de raccordement (30) est avantageusement ménagé dans le prolongement de l'un des éléments de jonction (16). De telles dispositions permettent de faciliter le raccordement électrique du dispositif de collecte (6).In Fig. 10, the first elementary frame (23) is joined to a second elementary frame (27) to jointly form a frame-shaped support (28) which houses the two interleaved electrodes (7, 8) in its interior space. . This assembly can be achieved by welding, gluing, interlocking, clipping or the like. The second elementary frame (27) is preferably structurally similar to the first elementary frame (23), or is likely to be limited to pieces of structure that attach to the first elementary frame (23), such as by welding, gluing, interlocking by clipping or similar technique. The frame (28) has a lumen (29) providing a passage for respective connecting members (30) of each of the electrodes (7,8), respectively to the corresponding terminal (10) of the power source (11). ) and to the mass (9). Each connecting member (30) is advantageously formed in the extension of one of the connecting elements (16). Such arrangements facilitate the electrical connection of the collection device (6).
Les fig.11 et fig.12 sont des représentations en coupe du dispositif de l'invention. L'un des cadres élémentaires (27) est équipé d'un peigne (24). Sur la fig.11 , la coupe est réalisée dans une zone des ajours (15) occupée par le peigne (24). Dans cette zone, le flux d'air (14) ne peut traverser le cadre en raison de la présence du peigne (24) qui occupe partiellement le passage d'air que ménagent les ajours (15). Sur la fig.12, la coupe est réalisée dans une zone des ajours (15) qui n'est pas occupée par le peigne (24), cette zone étant mise à profit pour le passage du flux d'air (14).Fig.11 and Fig.12 are sectional representations of the device of the invention. One of the elementary frames (27) is equipped with a comb (24). In fig.11, the section is made in an area of openings (15) occupied by the comb (24). In this zone, the air flow (14) can not pass through the frame because of the presence of the comb (24) which partially occupies the passage of air that the openings (15) leave. In FIG. 12, the cut is made in an area of the openings (15) which is not occupied by the comb (24), this zone being used for the passage of the air flow (14).
Sur les fig.13 et fig.14, les deux cadres élémentaires (23,27) sont chacun équipés d'un peigne (24). Les dents de chaque peigne (24) sont en prise alternativement sur les ailes (13) imbriquées de l'une et de l'autre des électrodes (7,8), et plus précisément sur l'extrémité des ailes (13) d'une électrode (7) et à la base des ailes (13) de l'autre électrode (8). Sur la fig.13, la coupe est réalisée dans une zone des ajours (15) occupée par les peignes (24). Dans cette zone, le flux d'air (14) ne peut traverser le cadre en raison de la présence des peignes (24) qui occupent partiellement le passage d'air que ménagent les ajours (15). Sur la fig.14, la coupe est réalisée dans une zone des ajours (15) qui n'est pas occupée par les peignes (24), cette zone étant mise à profit pour le passage du flux d'air (14). In fig.13 and fig.14, the two elementary frames (23,27) are each equipped with a comb (24). The teeth of each comb (24) are alternately engaged on the nested wings (13) of the one and the other of the electrodes (7,8), and more precisely on the end of the wings (13) of an electrode (7) and at the base of the wings ( 13) of the other electrode (8). In Fig.13, the section is made in an area of openings (15) occupied by the combs (24). In this zone, the air flow (14) can not cross the frame because of the presence of the combs (24) which partially occupy the passage of air that the openings (15) leave. In Fig.14, the section is made in an area of openings (15) which is not occupied by the combs (24), this area being used for the passage of the air flow (14).

Claims

Revendications claims
1. Dispositif de collecte (6) par précipitation électrostatique de particules préalablement chargées et véhiculées dans un flux d'air (14), ce dispositif (6) comprenant au moins deux électrodes (7,8,18) disposées dans le flux d'air, ces électrodes (7,8,18) étant respectivement reliées à la masse (9) et à une borne (10) d'une source polarisée (11), caractérisé en ce que lesdites électrodes (7,8,18) sont chacune constituées d'une paroi (12) comportant des ajours (15), à l'une au moins des faces de laquelle paroi sont ménagées des ailes (13).1. A collection device (6) by electrostatic precipitation of particles previously charged and conveyed in an air flow (14), this device (6) comprising at least two electrodes (7,8,18) arranged in the flow of air, these electrodes (7,8,18) being respectively connected to ground (9) and to a terminal (10) of a polarized source (11), characterized in that said electrodes (7,8,18) are each consisting of a wall (12) having openings (15), at least one of the faces of which wall are formed wings (13).
2.- Dispositif de collecte selon la revendication 1 , caractérisé en ce que la paroi (12) est disposée transversalement au flux d'air (14), les ailes (13) étant orientées sensiblement parallèlement à ce dernier.2.- Collecting device according to claim 1, characterized in that the wall (12) is disposed transversely to the air flow (14), the flanges (13) being oriented substantially parallel to the latter.
3.- Dispositif de collecte selon l'une quelconque des revendications précédentes, caractérisé en ce que les ailes (13) sont reliées entre elles par des éléments de jonction (16) matérialisant la paroi (12), les ajours (15) s'étendant entre deux éléments de jonction (16) successifs.3.- A collection device according to any one of the preceding claims, characterized in that the wings (13) are interconnected by junction elements (16) materializing the wall (12), the openings (15) s' extending between two successive joining elements (16).
4.- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la paroi (12) et les ailes (13) composant l'électrode (7,8,18) forment une pièce unitaire.4.- Device according to any one of the preceding claims, characterized in that the wall (12) and the wings (13) forming the electrode (7,8,18) form a unitary piece.
5.- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte au moins un couple d'électrodes (7,8,18) dont les parois (12) sont disposées en vis-à-vis, les ailes (13) étant imbriquées d'une électrode (7,8,18) à l'autre.5.- Device according to any one of the preceding claims, characterized in that it comprises at least one pair of electrodes (7,8,18) whose walls (12) are arranged vis-à-vis, the wings (13) being interwoven from one electrode (7,8,18) to the other.
6.- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte au moins trois électrodes (7,8,18) successives, une électrode médiane (18) comportant des ailes (13) à chacune de ses faces qui sont imbriquées avec les ailes (13) d'électrodes (7,8) d'extrémité.6.- Device according to any one of the preceding claims, characterized in that it comprises at least three successive electrodes (7,8,18), a median electrode (18) having wings (13) to each of its faces which are nested with the wings (13) of end electrodes (7,8).
7.- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les électrodes (7,8,18) sont maintenues dans le plan général de leur paroi (12) à l'intérieur d'un cadre (28).7.- Device according to any one of the preceding claims, characterized in that the electrodes (7,8,18) are held in the general plane of their wall (12) within a frame (28).
8.- Dispositif selon la revendication 7, caractérisé en ce que le cadre (28) est composé de deux cadres élémentaires (23,27) assemblés l'un à l'autre, entre lesquels sont maintenues les électrodes (7,8,18).8.- Device according to claim 7, characterized in that the frame (28) is composed of two elementary frames (23,27) assembled to one another, between which are maintained the electrodes (7,8,18 ).
9.- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte au moins un organe de maintien des ailes (13) d'au moins une électrode (7,8,18) à une distance de consigne séparant les ailes (13) les unes des autres.9.- Device according to any one of the preceding claims, characterized in that it comprises at least one member for holding the wings (13) of at least one electrode (7,8,18) to a set distance separating the wings (13) of each other.
10.- Dispositif selon la revendication 9, caractérisé en ce que l'organe de maintien est conformé en peigne (24).10.- Device according to claim 9, characterized in that the holding member is shaped comb (24).
11.- Dispositif selon la revendication 10, caractérisé en ce que les dents du peigne (24) sont en prise sur les ailes (13).11.- Device according to claim 10, characterized in that the teeth of the comb (24) are engaged on the wings (13).
12.- Dispositif selon les revendications 5 et 10, caractérisé en ce que les dents du peigne (24) sont en prise alternativement sur deux électrodes (7,8,18) à ailes (13) imbriquées.12.- Device according to claims 5 and 10, characterized in that the teeth of the comb (24) are engaged alternately on two electrodes (7,8,18) wings (13) imbricated.
13.- Dispositif selon la revendication 12, caractérisé en ce que les dents du peigne (24) sont en prise sur les ailes (13) de chacune des électrodes (7,8,18) dans la zone des ajours (15) que comporte la paroi (12) de l'une des électrodes (7,8,18). 13.- Device according to claim 12, characterized in that the teeth of the comb (24) are engaged on the wings (13) of each of the electrodes (7,8,18) in the area of openings (15) that includes the wall (12) of one of the electrodes (7,8,18).
14.- Dispositif selon la revendication 13, caractérisé en ce qu'il comporte au moins un couple de peignes (24), qui sont respectivement chacun en prise en bout des ailes (13) d'une électrode (7,8,18) et à la base des ailes (13) d'une autre électrode (7,8,18).14.- Device according to claim 13, characterized in that it comprises at least one pair of combs (24), which are each respectively in end engagement of the wings (13) of an electrode (7,8,18) and at the base of the wings (13) of another electrode (7,8,18).
15.- Dispositif selon l'une quelconque des revendications 9 à 14, caractérisé en ce que l'organe de maintien et le cadre élémentaire (23,27) forment une pièce unitaire.15.- Device according to any one of claims 9 to 14, characterized in that the holding member and the elementary frame (23,27) form a unitary piece.
16.- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de collecte (6) est associé à un pulseur (2) générateur du flux d'air (14), et est disposé en amont d'un dispositif de charge (5) des particules.16.- Device according to any one of the preceding claims, characterized in that the collecting device (6) is associated with a blower (2) generating the air flow (14), and is arranged upstream of a device for charging (5) the particles.
17.- Dispositif selon la revendication 16, caractérisé en ce que le dispositif de collecte (6) et le dispositif de charge (5) forment un ensemble unique logé dans un boîtier commun (1).17.- Device according to claim 16, characterized in that the collection device (6) and the charging device (5) form a single unit housed in a common housing (1).
18.- Dispositif selon la revendication 17, caractérisé en ce que ledit boîtier (1) est celui d'une installation de ventilation, de chauffage et/ou de climatisation.18.- Device according to claim 17, characterized in that said housing (1) is that of a ventilation system, heating and / or air conditioning.
19.- Dispositif selon la revendication 18, caractérisé en ce que le dispositif de collecte (6) est placé en entrée d'air (3) de l'installation, en aval du dispositif de charge (5).19.- Device according to claim 18, characterized in that the collection device (6) is placed at the air inlet (3) of the installation, downstream of the charging device (5).
20.- Dispositif selon la revendication 16, caractérisé en ce que le dispositif de collecte (6) et le dispositif de charge (5) sont formés d'ensemble distincts logés dans des boîtiers respectifs en communication aéraulique pour le passage du flux d'air (14) de l'un à l'autre des boîtiers.20.- Device according to claim 16, characterized in that the collection device (6) and the charging device (5) are formed as a separate set housed in respective housings in aeraulic communication for the passage of the air flow (14) from one to the other of the housings.
21.- Procédé d'obtention d'une électrode d'un dispositif de collecte selon la revendication 4, caractérisé en ce que l'électrode (7,8,18) est formée à partir d'un feuillard (19) poinçonné pour ménager les ajours (15), puis replié dans son plan général pour former les ailes (13).21. A method for obtaining an electrode of a collection device according to claim 4, characterized in that the electrode (7, 8, 18) is formed from a strip (19) punched to arrange the openings (15), and folded in its general plane to form the wings (13).
22.- Procédé d'obtention d'une électrode d'un dispositif de collecte selon la revendication 4, caractérisé en ce que l'électrode (7,8,18) est formée par moulage d'un matériau plastique rendu conducteur.22.- A method of obtaining an electrode of a collection device according to claim 4, characterized in that the electrode (7,8,18) is formed by molding a plastic material made conductive.
23.- Procédé d'obtention d'une électrode d'un dispositif de collecte selon la revendication 4, caractérisé en ce que, l'électrode (7,8,18) est formée par extrusion d'un matériau plastique rendu conducteur.23.- A method of obtaining an electrode of a collection device according to claim 4, characterized in that the electrode (7,8,18) is formed by extrusion of a plastic material made conductive.
24.- Procédé selon l'une quelconque des revendications 22 et 23, caractérisé en ce que le matériau plastique est rendu conducteur par adjonction d'une charge métallique.24.- Process according to any one of claims 22 and 23, characterized in that the plastic material is made conductive by adding a metal filler.
25.- Procédé selon l'une quelconque des revendications 22 et 23, caractérisé en ce que le matériau plastique est rendu conducteur par application d'un revêtement.25. The process as claimed in claim 22, wherein the plastic material is made conductive by applying a coating.
26.- Procédé d'obtention d'une électrode d'un dispositif de collecte selon la revendication 4, caractérisé en ce que l'électrode (7,8,18) est formée par extrusion d'un matériau métallique. 26.- Process for obtaining an electrode of a collection device according to claim 4, characterized in that the electrode (7,8,18) is formed by extrusion of a metallic material.
EP06744771A 2005-06-14 2006-05-19 Device for electrostatic precipitation of charged particles carried in an air stream Active EP1899073B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0506011A FR2886870B1 (en) 2005-06-14 2005-06-14 DEVICE FOR ELECTROSTATIC PRECIPITATION OF PARTICLES CHARGED AND VEHICLED IN AN AIR FLOW
PCT/IB2006/001376 WO2006134435A1 (en) 2005-06-14 2006-05-19 Device for electrostatic precipitation of charged particles carried in an air stream

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EP1899073A1 true EP1899073A1 (en) 2008-03-19
EP1899073B1 EP1899073B1 (en) 2010-06-23

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KR (1) KR20080021769A (en)
CN (1) CN101272863B (en)
AT (1) ATE471762T1 (en)
DE (1) DE602006015053D1 (en)
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CN102319695B (en) * 2011-07-19 2014-02-12 苏州清莲纳米环保科技有限公司 Electromagnetic field dust removing device
CN102319627B (en) * 2011-07-19 2014-02-12 苏州清莲纳米环保科技有限公司 Multi-plane dust removing device
KR102311105B1 (en) * 2016-12-09 2021-10-08 쌩-고벵 글래스 프랑스 Window panes with capacitive sensors
FR3069759A1 (en) * 2017-08-03 2019-02-08 Commissariat A L'energie Atomique Et Aux Energies Alternatives AIR CLEANING HELMET FOR DYNAMIC USE
JP2019115893A (en) * 2017-12-27 2019-07-18 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． Charging device and dust collector
KR102022381B1 (en) 2018-10-26 2019-09-18 한국토지주택공사 Apparatus for collecting fine dust

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WO2006134435A8 (en) 2008-04-17
CN101272863B (en) 2011-04-20
EP1899073B1 (en) 2010-06-23
DE602006015053D1 (en) 2010-08-05
WO2006134435A1 (en) 2006-12-21
FR2886870B1 (en) 2007-09-21
ATE471762T1 (en) 2010-07-15
KR20080021769A (en) 2008-03-07
CN101272863A (en) 2008-09-24
FR2886870A1 (en) 2006-12-15

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