EP0288351A2 - Abgasreiniger, insbesondere für Luft, mit einer Ionisationskammer - Google Patents

Abgasreiniger, insbesondere für Luft, mit einer Ionisationskammer Download PDF

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Publication number
EP0288351A2
EP0288351A2 EP88400750A EP88400750A EP0288351A2 EP 0288351 A2 EP0288351 A2 EP 0288351A2 EP 88400750 A EP88400750 A EP 88400750A EP 88400750 A EP88400750 A EP 88400750A EP 0288351 A2 EP0288351 A2 EP 0288351A2
Authority
EP
European Patent Office
Prior art keywords
sheet
box
air
ionization chamber
outlet
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.)
Withdrawn
Application number
EP88400750A
Other languages
English (en)
French (fr)
Other versions
EP0288351A3 (de
Inventor
René Guy Georges Alexandre Godard
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.)
Individual
Original Assignee
Individual
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
Priority claimed from FR8704313A external-priority patent/FR2612805A1/fr
Application filed by Individual filed Critical Individual
Publication of EP0288351A2 publication Critical patent/EP0288351A2/de
Publication of EP0288351A3 publication Critical patent/EP0288351A3/de
Withdrawn legal-status Critical Current

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    • 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
    • B03C3/36—Controlling flow of gases or vapour
    • 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
    • B03C3/32—Transportable units, e.g. for cleaning room air
    • 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
    • B03C3/38—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
    • 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
    • B03C3/60—Use of special materials other than liquids

Definitions

  • the present invention relates to air purifiers that are installed in premises in order to purify the atmosphere.
  • the known purifiers are of different types but all have a fairly poor performance due in particular to a poor design of the structure which provides for an air path which is poorly coordinated with the requirements of the electric field to be created in an ionization chamber.
  • the invention provides a new solution to the problem of air purification in rooms by proposing a rational structure which greatly improves the flow of air in the room and inside the purifier itself.
  • the invention relates to gas purifiers which contain an ionization chamber traversed by a taut conducting wire through which a high voltage electric current (of the order of 10,000 volts) must pass to create an electric field through which particles in suspension in the gas are ionized and are, therefore, biased towards the internal metal walls of the chamber on which they are deposited for their collection.
  • a high voltage electric current of the order of 10,000 volts
  • the need for the walls of the chamber to be conductive leads the manufacturers to produce the metal chamber. They are essentially smooth sheets, relatively thick and heavy to be robust, which requires the presence of holding and fixing members to avoid, in particular, the displacements, beats and vibrations due to the displacement of the pulsed gas by a wind tunnel.
  • the chambers are therefore very removable, in the strict sense of the word, but on condition of carrying out a real disassembly followed by a reassembly, and this requires the use of tools. Their price is such that they must be cleaned and not replaced.
  • the internal walls of the chamber should be rough during operation in order to effectively retain the deposited and smooth particles at the time of cleaning so that it is easy and complete.
  • the subject of the invention is an air purifier for premises, of the type comprising a substantially parallelepipedal box which must be placed at the top of a room and which has a front, an upper face and a lower face, box which has an air inlet, an air outlet, an ionization chamber with conductive internal walls and containing a conductive wire to be traversed by a high voltage electric current, the air being set in motion from the inlet towards the outlet by at least one mechanism such as a turbine, characterized in that the air inlet is located on the front and the outlet on the underside of the box, the ionization chamber being formed by two lateral flanges and by a curved wall which has an ascending part from the entrance, an upper arch having a center of curvature substantially coinciding with the location of the conductive wire, and a descending part associated with a transverse deflector which extends from the bottom of thebox towards the center of curvature of the vault up to a vertex situated along a line higher than the
  • the ionization chamber has an increasing passage section, at least from the top of the deflector and up to the outlet; - The deflector is inclined from bottom to top and from front to back of the box in order to contribute to giving the ionization chamber an increasing passage section; - The deflector is made of an insulating material and serves as a support for the conductive wire; - the purifier includes a deflector inclined up and down and front to back from the facade to the entrance to the ionization chamber.
  • the invention also relates to a gas purifier, in particular air, of the type comprising a box provided with at least one inlet and at least one outlet and containing a profiled ionization chamber for ensuring aerodynamic guidance of the gas flow from the inlet to the outlet, characterized in that the ionization chamber consists at least partially of a sheet of cardboard or similar material stored flat and which must be placed in the box in a removable manner after folding and / or bending, the face of this sheet which must be on the internal side of the ionization chamber being coated with a bare conductive material, such as aluminum not coated with an insulating product.
  • the cardboard sheet having one side smoother than the other, the conductive material is placed on the less smooth side;
  • the coated sheet is marked with crease lines according to which it must be folded and which determine specific parts which must cooperate with elements of the box in order to be kept in shape in its place of function while being interchangeable;
  • the coated sheet is marked with two transverse rectilinear creasing lines which have to favor the folding of the sheet towards the outside according to two margins, the sheet having to be bent inwards so that the conductive coating is located on the concave face of the sheet when it is shaped;
  • the coated sheet comprises a central part to be bent and secured to two lateral cheeks delimited by two crease lines substantially aligned with two edges of the sheet, the cheeks possibly scalloped to be folded in planes perpendicular to that of the sheet before bending ;
  • each cheek has a curved free edge whose shape corresponds to the section that the sheet must have at this point after bending.
  • a scrubber according to the invention comprises a box parallelepiped 1 having a front 2, an upper face 3, a rear face 4 and a lower face 5, as well as two small lateral faces 6.
  • the box 1 On the front 2, there are two grids 7 placed in front of an opening of the box 1 constituting an air inlet to be purified. Next to the grids 7, there is an infrared signal sensor 8 and an indicator light 9.
  • the box 1 is placed at the top of a room A, against the ceiling B and is therefore inaccessible without a ladder. To allow users to turn the purifier on and off, it is easier to use a small portable transmitter to send signals to the sensor 8.
  • the indicator 9 is on when the device is operating and off when the device is stopped.
  • the lower face 5 is provided with grids 10 in front of an opening of the box 1 constituting an outlet for purified air.
  • the housing 1 In the housing 1 are the functional elements of the device. At the lower front part, there are two turbines 20 and 21, the casing of which has air suction openings 22 and a discharge orifice 23. A deflector 24 extends from the top of the air inlet to 'at the edge of the discharge orifice 23. When the turbines 20 and 21 are running, they suck in the outside air according to the arrows F1 and this enters through the openings 22 then leaves the turbines through the orifice 23 to penetrate from bottom to top according to arrows F2 in an ionization chamber 30.
  • the ionization chamber 30 is formed by the combination of several elements which are a curved wall 31, a deflector 32 and lateral flanges or cheeks 33.
  • the front edge 34 of the wall 31 is adjacent to the lower edge of the deflector 24 and, therefore, at the edge of the orifice 23, while its rear edge 35 is in the bottom of the box 1, near the rear edge of the grids 10.
  • the shape of the wall 31 is such that it has an upper arch 36 and a descending rear part 37 so that the air entering the ionization chamber 30 from bottom to top according to the arrows F2 is forced to turn and descend according to the arrows F3 to exit the box 1 through the grids 10, according to the arrows F4.
  • a conductive wire 38 which extends in the longitudinal direction of the box 1 and, therefore, of the chamber 30 and transversely to the direction of the air flow F2-F3.
  • This wire 38 must be traversed by a high voltage electric current, of the order of 10,000 or 12,000 volts and the internal faces of the ionization chamber 30, wall 31, deflector 32 and flanges 33, are conductive, either due of the material of which these elements are made, either by coating, in particular by means of aluminum sheets. A powerful electric field is thus created which tends to apply the dust and particles suspended in the air against the walls of the chamber 30.
  • This principle is known in itself and therefore does not form part of the invention.
  • the upper edge 39 of the deflector 32 is at a level higher than that of the rear edge of the discharge orifice 23 and extends in the direction of the wire 38. Thanks to these arrangements, a sort of channel 40 is created, the passage section is substantially constant and directs all the air flow in the region of the center of the arch, around the wire 38. If the edge 39 were aligned with the rear edge of the orifice 23, part of the air would be forced down from the chamber 30, without having penetrated the strongest of the electric field and the particles and dust could leave the chamber 30 practically without having undergone the ionization effect.
  • the same aerodynamic structure can be obtained other than with the deflector 32, for example by means of a suitably profiled nozzle.
  • the deflector 32 extends in a plane which is inclined from rear to front and from top to bottom. This obliquity, as well as the inclination of the rear part 37, gives the ionization chamber an increasing passage section which causes a slowing of the air flow, conducive to the capture of particles and dust which have not been stopped earlier.
  • FIG. 4 represents a variant according to which the deflector 32 is made of an insulating material, such as glass, and has two tabs 32 a and 32 b .
  • the electric wire 38 is kept stretched between these two legs by having its two ends embedded in the glass. It is within the reach of the skilled person to produce this structure by providing the appropriate electrical connections.
  • the edge 39 of the deflector 32 must always be lower than the wire 38 because, of course, the air must pass around this wire.
  • the box 1 must be fixed to the wall, near the usual ceiling B, for example by means of screws 50 passing through the rear face 4. As is known per se, it is thus possible to immobilize the rear face 4 and articulate the assembly thereon. of the box, to allow its opening to access the internal elements of the device, especially for cleaning and maintenance.
  • a device having the structure according to the invention allows a very rational circulation of air since the suction of the air to be purified is done substantially horizontally, near the ceiling B, where s 'accumulate smoke, dust and hot air, while the discharge takes place vertically, near the wall and in an area where no stray current due to the suction can block the flow of purified air.
  • a sheet according to the invention is made of cardboard and has a very smooth face 101 and a less smooth face 102.
  • This difference may arise from the manufacturing method which provides that during development, the fibers that are still wet constitute a very fragile and cohesive sheet which is supported by being placed on a carpet or other non-smooth support which communicates its surface irregularities to it, or which provides for the calendering of the sheet for compress it, one of the cylinders of the calender being polished so that the corresponding face 101 is smooth while the opposite cylinder has a rough surface, more or less regular, which provides a complementary surface on the face 102. This can also come of a coating of the face 101.
  • the face 101 being more noble is chosen to receive a coating, in particular a thin sheet of aluminum, because we seek the regularity and the smoothness of the worked face.
  • the rough and more or less voluntarily marked face 102 is disposed on the hidden side and is particularly suitable for coating adhesives.
  • the covering 103 may consist of an aluminum sheet which will not have the glossy appearance which it has when it is well stretched or which it would have if it had been applied against the face 101. It therefore acquires, by using it thus, a new particular quality with regard to the retention of ionized particles, without losing at all its qualities of electrical conductivity.
  • FIG. 6 we see an example of a sheet constituted as said above with reference to FIG. 5 and having two transverse rectilinear creasing lines 104 and 105 which determine two margins 106 and 107.
  • the new sheets are stored at flat and thus occupy little volume. They can be assembled in groups and optionally packaged in boxes, with separators to protect the coating 103 against knocks and tears.
  • the essential is an ionization chamber in which the gas to be purified arrives according to the arrows F5, under the edge carrying the margin 107 and leaves it according to the arrows F6, near the edge carrying the margin 106. It is because of the direction of displacement of the gas flow that the high-voltage electric wire A is described as "transverse", the situation of which has been indicated schematically and since the creasing lines 104 and 105 are parallel to this thread A, they are also considered as "transverse".
  • the sheet has free edges 108 and 109 which do not create sides to the ionization chamber.
  • independent flanges must be provided, for example fixed or removable partitions in the box and we can give these flanges an upper profile corresponding to the curve that we want to give to the sheet so that by placing it on them and holding it there, we are assured of the precise profile desired.
  • the sheet can be maintained by any means, in particular by a stirrup which is immobilized using the blocking resulting from the closure of the box by a cover or the like.
  • the sheet is advantageously made of cardboard, due to the excellent behavior of this material and its acoustic qualities which give the assurance that the operation of the device will be very silent.
  • the cardboard also has the advantage of having a substantial thickness E and of being flexible. We can then use these mechanical characteristics to immobilize the sheet by a simple wedging or pinching of the margins 106 and 107. This is obviously not the case with metal which is rigid, thin, slippery and noisy when it vibrates or when it taps another metal piece.
  • the ionization chamber When the apparatus is in working order, the ionization chamber is formed by the sheet in the position of FIG. 7.
  • the gas which can be the air of premises for example, is sucked by the entry by means turbines and it is guided by deflectors at the entrance of the chamber, that is to say under the edge formed by the creasing line 105. It is thus pulsed in the electric field generated between the wire A and the conductive face of the sheet, namely the coating 103.
  • the particles and dust are ionized and are plated on the coating 103 which retains them all the better as its surface is not very smooth.
  • the air purified leaves the ionization chamber near the edge of the sheet formed by the crease line 104 and leaves the device.
  • the sheet is continuously charged with dust when the device is operating and, after a certain period of time which can be a few days or a few weeks, the sheet is as "saturated", that is to say that the electric field becomes less intense because the conductivity of the coating 103 attenuates as and when the dust accumulates and that the roughness offered to this dust so that it clings to it becomes blunt by filling the recesses.
  • the box of the apparatus is opened, the sheet is removed, it is replaced by another new taken from the stock and shaped as in FIG. 7.
  • the worn leaf is discarded.
  • the price of the new sheet is low enough and the intervention time is short enough for the repair operation to be significantly less costly than the cleaning which is currently necessary.
  • replacing one sheet with another can be so simple that one can consider entrusting it to the user himself, thus avoiding the movement of qualified personnel.
  • FIG. 8 a variant is shown according to which the new sheet presented flat is integral with two lateral cheeks 110 and 111 determined by rectilinear creasing lines 112 and 113 substantially aligned with the free edges 114 and 115 of the sheet.
  • the shaping of this sheet is done by first folding the cheeks 110 and 111 along the creasing lines 112 and 113 inward, namely towards the face 102 carrying the coating 103, and then bending the whole sheet as shown in figure 9.
  • the cheeks 110 and 111 can be given curved edges 116 and 117 so that, after folding the cheeks 110 and 111, the edges of the sheet are applied to the curved edge. It is easy to provide the interior of the box so that the shaped sheet can be placed and maintained there, including the cheeks 110 and 11, without using fixing means. However, it is possible as a precaution to keep the cheeks 110 and 111 in the folded position for example by means of adhesive tape.
  • the margins 106 and 107 are also provided here, but by providing for the presence of cheeks, these can be combined with holding means which would make the creasing lines 104 and 105 and the margins 106 and 107 unnecessary.
  • cheeks 110 and 111 each have a notch respectively 118 and 119 which allows them to best adapt to the shape of the interior of the box and to the presence of elements such as deflector, turbines etc. in order to avoid leaks and pressure losses as much as possible.

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  • Electrostatic Separation (AREA)
EP88400750A 1987-03-27 1988-03-28 Abgasreiniger, insbesondere für Luft, mit einer Ionisationskammer Withdrawn EP0288351A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8704313 1987-03-27
FR8704312 1987-03-27
FR8704312 1987-03-27
FR8704313A FR2612805A1 (fr) 1987-03-27 1987-03-27 Epurateur de gaz, notamment d'air, comprenant une chambre d'ionisation jetable

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP89402071.8 Division-Into 1988-03-28
EP89402071A Division EP0344074A3 (de) 1987-03-27 1988-03-28 Abnehmbare Ionisationskammer für Abgasreiniger, insbesondere für Luft

Publications (2)

Publication Number Publication Date
EP0288351A2 true EP0288351A2 (de) 1988-10-26
EP0288351A3 EP0288351A3 (de) 1989-01-25

Family

ID=26225873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400750A Withdrawn EP0288351A3 (de) 1987-03-27 1988-03-28 Abgasreiniger, insbesondere für Luft, mit einer Ionisationskammer

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EP (1) EP0288351A3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6964698B1 (en) * 2004-06-07 2005-11-15 Balcke-Durr Gmbh Gas supply for electrostatic filter and electrostatic filter arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE551164C (de) * 1930-04-01 1932-09-05 Siemens Schuckertwerke Akt Ges Vorrichtung zur elektrischen Fliehkraftreinigung von schwebekoerperhaltigen Gasen
US3412530A (en) * 1967-02-06 1968-11-26 George H. Cardiff Electrostatic air filter structure
FR2583657A1 (fr) * 1985-06-20 1986-12-26 Mingret Sa Ateliers R Dispositif de nettoyage de l'air

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6964698B1 (en) * 2004-06-07 2005-11-15 Balcke-Durr Gmbh Gas supply for electrostatic filter and electrostatic filter arrangement

Also Published As

Publication number Publication date
EP0288351A3 (de) 1989-01-25

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