DE2719035A1 - ELECTROSTATIC FAILURE DEVICE - Google Patents

Description

η. ; · -; i \ Kr _ JiY

K. SCHL-VAMN PH JAKOa Q. 3 .-: zO'-D

U.N. Ffn .v \ r λ · = ·, ^ - ^ v

3 MUNICH QQ

April 28, 1977

P 11 535

Nissan Motor Company, Limited

Ho. 2, Takara-iaehi, Kan a-raw a-ku, Yokohama City, Japan

Electrostatic precipitator

The invention relates generally to an air cleaning device. In particular, it looks at an electrostatic precipitator suitable for installation in a motor vehicle to purge air in the vehicle's passenger compartment clean.

As is known, electrostatic precipitators are used on numerous. Used extensively in areas because they have the ability to handle a large volume of gas or air with an acceptably small pressure drop and remove micron-sized particles. Some of the above-mentioned Auafällvorun ^ an jin.d rr.with so-called activated carbon filter au3g9rü3 "i9t,

709845/1040

ORIGINAL

271903b

ua 3oh'idlicc.ä3 Ο ^ οα (0,), daa in Überflu3 in ainam EoroaaantlaJuAss3b3i-3i. '; h that AU3A ^ ll7orrichtungen is generated to absorb.

With the known electrostatic precipitators, however, a high cleaning effect (over 90% ) can only be expected if the housing of the precipitator is designed so that it has a relatively large volume so that the grain flowing through has a relatively long dwell time in the housing. Therefore, the installation of such an electrostatic precipitator with a high level of efficiency on 3in * a motor fjirzsu? air.-ία large available plata in an air conditioner »

A goal of the present invention is therefore to provide an improved To create an electrostatic precipitator, in spite of this its compact design offers a high cleaning performance.

Another object of the invention is to provide an improved electrostatic precipitator that is simple to use Way can be produced in ^ that the conventional precipitator is slightly modified

Another object of the invention is to provide an improved electrostatic To create precipitator which is suitable for installation in an air conditioning system mounted on a motor vehicle.

In order to achieve this, the invention provides an electrostatic precipitator for suctioning off those suspended in air Particulate matter, comprising: A housing having an inlet and an outlet through which the air is passed will; a high voltage electrode disposed in the housing; a collecting electrode which is in the housing at a location in the Near the high-voltage electrode, whereby the high-voltage and the Samuel electrode so to a power source are connected that zwiac & en jüWöa a DC potential

ORIGINAL INSPECTED

an ^ ale. ^ t ^T virJ, υ πι a Kororza discharge area vor2U3eaerij where an ionization of the air takes place, as well as an electric field, ii des giladen? Particles become Samaalelaktrode gatriebaa; and an additional collecting device which has a polarity opposite to the high voltage circuit and is arranged in the housing at a location downstream of the high voltage and collecting electrode.

A preferred idea of the invention is to arrange several high-voltage electrodes and several Sanunel electrodes in an upstream part of a housing. Stroin down-3 -ron the bundle Λν? High-voltage 3 and Saauaelslectroden a further collecting device is attached in the housing, which has a polarity opposite to the Koc'ispaixnunga ^ electrodes in order to increase the cleaning efficiency of the precipitation apparatus according to the invention.

Further features, details and advantages ά <3Τ invention will become apparent from the following description of Auaführungabeispielen reference to the accompanying drawings. Barin show:

Fig. 1 is a sketch of an electrostatic precipitator of the previous type;

2 shows a representation to explain the inventive Steps of the present invention;

3 shows a sketch of a preferred embodiment of the according to the invention improved electrostatic precipitator;

Figs. 4A and 4B are sketches each illustrating configurations of additional electrodes used in the one shown in Fig. 3 Auafällapparat are used;

5A and 5B are sketches each illustrating box-shaped electrodes which, as additional electrodes 4A and 4B can be used; and

6-8 sketches showing the positional relationship between the additional

ORIGINAL INSPECTED

271903b

en ΖΙε-rtroJa and an activated carbon filter zeigjii that andteile d93 arfinüung ag an ...

Before the construction according to the invention is described, an explanation of the electrostatic precipitator in use up to now is given with reference to B ¹ Ig. 1 given in order to clearly roof the inventive steps of the invention.

In Fig.1, a static precipitator is a previous one Art shown, which is designated as a whole by 10. The fall-out apparatus 10 essentially has a housing in the illustration 12, da3 on the left side of the drawing an inlet 14 and one outlet 16 on the right side. Like the following becomes clear, contaminated gas or air is forced to circulate from inlet 14 to outlet 16 through daa Housing 12 passed. In the housing 12 are near the inlet 14 raehrera spaced high-voltage electrodes 18 in the form of voa Plates arranged, dia practically parallel to each other and to the Iiär: g3ach3e of the housing 12 are attached, as shown in the Drawing becomes clear. Corona wires 20 are connected in a corresponding number via support elements 19, which are electrically conductive the relevant high-voltage electrodes 18 connected in such a way that the corona wires 20 pull through the housing 12 transversely. TTa To put it more clearly, the corona wire 20 extends practically perpendicular to the drawing plane of the pig. 1. As you can see, each corona wire 20 is arranged between two adjacent collecting electrodes 22 at the end of each support element 19, the is mechanically and electrically connected to the respective high-voltage electrode 18. Multiple spaced collecting electrodes 22 in the form of plates are also arranged in the housing 12 in such a way that they are at a distance from the high-voltage electrodes 18 having such an arrangement that the electrodes 18 and 22 alternate with one another, as shown in FIG is shown in the figure. A direct current source 24 is connected to the high voltage and collecting electrodes 18 and 22,

709845/1040

ORIGINAL INSPECTED

· ■ /

2719Ü3S

U ^ i z \ -iX3c''xaa _v '.ii Jlilc-r j ien 13 and 2 ^ a honsa Glaicaaircioo- »tent Lal ar: 2aI-i,: s.'X. In daa 3333151: - ^ a example is an 'iii · iioohapaar.urig.ialdictrodsn 13 and daait an dia Koroaaarähta 20 aine poai; _ / 3! .Auuig a ^ galijjc, -./inra-i· :! the S. '. c ^ iälala'ictro jm 22 are grounded. In the llahe of the Aualassas 16, the housing 12 is attached to a Gabläue 2S, which causes an air flow through the Galiäusa 12 from the inlet 14 to the AU3laä 16. Between dea B ^; iadal der Slatctro-Jan 18 and 22 and the blower 26 iat an activated carbon filter 23 attached to absorb ozone (0,), which is generated in the vicinity of the corona wires 20 ^ rd.

With this construction of the previous electrostatic precipitator-33 10 gV.it the? .3inigun _! 53prj.J3a as follows before aioh: The polluted air is introduced through inlet 14, via one ^. Pfail α'-τ, vdäut nt ,; uni bj-.ya ^ t ζόλ Eündal of the electrodes 18 and 20 to then reach an electrical discharge area (or corona discharge area) where ionization of the air takes place. The ziiv ^ gta.! Ionan kollidisran nit dan in the air suapenJisrta.i Partilrjln and transfers to theeae an electric charge which is positive in the present Pail. The positively charged particles then migrate into the interior of the bundle of electrodes 18 and 22 together with the air flow created by the fan 26 and, with the help of the electric field established between the high voltage electrodes 18 and the samraal electrodes 22, drift to the collecting electrodes 22, on which aie eventually precipitate, their electrical charge becoming ITuIl. During this process, a considerably large amount of ozone (0.1) is generated in the corona discharge area, but this ozone is absorbed by the activated carbon filter 28. The cleaned air is released from outlet 16 "

The construction of the hitherto common precipitating apparatus3 10 then has the following deficiency: The possibility of daa GlaichstromputGatiai Avisaaen dsn HosLicjpanmmga- und Sammelslctroden 18 uad to increase 22, iat limited. The reason for this is that

709845/1 (KO

ORIGINAL INSPECTED

v.?r exnäoi u, -. ^ wobiili : n. ήο, α-ί-ΐ potential an un-3rwün3ch'5-? r? u;: ka: a -.ioersciilag z '/ ison »;: d? n" Slakbrodaa 13 and 22 take place at> Disa b 3d sat .) ^, iJa ^ i o-> i ax.i3.li gvoSe.i lu ^ tvoluasn with dam objn arw ^ him-Ϊ3ΐι Failure apo.i.-at; 10 k-ai-i * ηοϋβ Ki-inigungaleiatung ^ u expect iat. '7 a an aian, among other things sin large air volume durclisublassa, that Gaaläse 25 run ra3char so that the flow rate of the polluted air is noticeably increased, as geachdian, that some g ^ laia-ia particles pair the housing 12, Anyhow, it was caught by the Sasu al electrodes 22, and ia achliamstaa? all bar3it3 on the Saauaelelsktroden 22 niadargeschlagana particles can be forced to detach from the electrodes, whereby the cleaning efficiency of the precipitation device 10 harao ^ sastZi; wlr-i * in addition, the undesirable legally 18 and 22 escaped from the bundle of the electrodes or not s ing 3XaH ^ α of Partikai aetzan located on einig3 dam Ak ^- Ci <rkohlefiltar 23 from causing its ozone -absorbent effect is reduced.

In? I;?. 2 a scheaati ζτ'-ΐν diagram is inclined, which explains the characteristic construction of an electrostatic precipitator according to the invention. The precipitation apparatus is denoted overall by 30. As can be seen from this figure, the precipitating apparatus 30 comprises essentially the same parts as the conventional apparatus 10 described above, with the exception of a few components. The parts common to the apparatus of Pig.1 are identified in Pig.2 with the same reference numbers. According to the invention, an additional collecting device 32 in the form of a collecting electrode is arranged between the bundle of high-voltage and Saamelelectrodes 18 and 22 and the activated carbon filter 28. The device 32 is connected to a DC voltage source 34 in order to be provided with a high direct current potential with a polarity opposite to the high voltage electrodes 18. In this pig. the device 32 is charged with a negative charge. The negative potential for the device 32 can be applied from a negative pole of a so-called hegative ion generator,

709845 / 10A0

ORIGINAL INSPECTED

■ /

271903b

which is provided in O.er Xlim ^ anlaga.

Bsi '.Iieaar £ o: ijtruktioa ^ 7:.' ^ '] Ir. C. -If -iaicht uie von dia 3au ~ Salt electrodes 22 escaped or not captured particles forced to drop off at the Suaätalichen collecting facility 32, or they are flagged by this facility, before they reach the activated carbon filter 28. In this way In the precipitation device 30, a higher cleaning efficiency becomes received. In addition, the ozone absorption effect of the Carbon filter 28 works well for a long time.

In Figure 3, an electrostatic precipitator 30a is shown, the feature of the invention illustrated in Fig. 2 contains. The Auafällapparat 30a v-ar-vend ^ t had several complaints Plates 32a al3 additional signaling device 32 of Pig.2 would remain. As can be seen, the plates 32a are practically parallel to each other and to the Hoehapantiung ·} - and Sasaelelelyktroden 18 and arranged so that one in d ^ a G-sh'äuse 12, dag in this Fi ^. is not shown, a free air flow is maintained. the As shown in Figures 4A and 43, plates 32a can be grooved be.

Pig.4A shows an arrangement of plates 32b in which the grooves 35 in two adjacent plates are symmetrical about one between these two plates are positioned on imaginary plane 33a. ? ig.4B shows an arrangement in which the grooves 35 of two adjacent plates 32c are asymmetrical on one between these two plates lying imaginary plane 33b are arranged. Preferably, the plates 32b and 32c are arranged such that the Air can flow along them and through the grooves, so that there is a smooth air flow in the housing 12. By the making of grooves 35 in plates 32b and 32c results in a larger collecting surface on each plate 32b and 32c.

The additional collecting means 32 may be in the form of chain-colored Electrodes 32d and 32a have, as shown in Pig.5A uni

70 9845/1040

ORIGINAL INSPECTED

271903b

53 .332? I ^ are.

Γ.13 kasteniSrioi.-B ..Ol ^ rtrod a 323 of Fig. 5A has a rectangular gäschlosaenen 2ahzten 3-5 aui, in which several vertical » Trsiinplattsn 33 and zahrere horizontal dividing plates 40 Ö3rart are arranged so that they cross each other to form several square ones Form compartments 42 see below. The box-shaped electrode 32d is inserted into the housing 12 in such a way that the longitudinal axis of each Compartment 42 runs practically parallel to the axis of the housing 12, among other things, in the housing 12 a smooth air flow is provided. hen. Another box-shaped electrode 32e, shown in Fig. 53, includes the same elements 36, 38 and 40, as in Fig. A, and the several inclined partition plates 44. As it can be seen that each plate 44 is arranged on an imaginary diagonal plane in each square compartment so that two triangular compartments 42a and 42b are formed. Through the constructions Pig.5A and 53 we-3 have the ability to hold plague of particles or the particle amael surface of the additional * n Sam loading device 32 noticeably increased. In addition to these configurations of the compartments 42, 42a and 42b, there is also a honeycomb-shaped one Configuration possible.

They 5 "ig.6-8 show other examples of the additional collection facility 32.

In all of FIG. 6 there is an additional collecting device 32 a wire mesh 32f is used. The grid 32f is between the bundle of electrodes 18 and 22 and the activated carbon filter 28 is mounted in such an arrangement that an imaginary plane including the front surface of the grid 32f is perpendicular runs to the axis of the housing 12.

In Fig.7 a wire mesh 32g is used to create a front To form the frame part of the activated carbon filter 28.

In Figure 8, a wire mesh 32h is used to provide a housing for the Forming activated charcoal filter 28.

703845 / 1O4C ORIGINAL INSPECTED

■ / ■

2719Ü35

With Ililfö diisjr ".Constraktionsn -ier? Ig.S-8 lcazm the inventiui.iS ^ j; aaJd Au3f'.lllapparat are built kompsit, since a d» lana jjrahi. "Ieti * I -.? Aeri1; prr ^ ctiach s-ifilcrecht ijur axis άβ3 Geiiäuaan is indicated. The Ausiällapparat with the construction of 5 ¹ Xg.3 offers a higher cleaning efficiency than the devices according to the coast construction in Fig. 6 and 7, since in the case of Pig.3 the air is forced to pass wire mesh twice. It should be mentioned that the wire nets 32f, 32g or 32h can also be replaced by a perforated metal plate.

It should also be pointed out that if the additional SajiaaleiTirichtung 32 hera * 32. $ hj \ bur is inserted in the housing 12, the cleaning of the device 32 is significantly simplified, since 3X3 can be done if the device 32 from deia Housing 12 is removed.

From the preliminary description it is clear that the invention «Ijktroatatiacha failure apparatus despite its kc.apaktsn Kon3tr-ktion has a high isolation efficiency and is therefore suitable for contact on a motor vehicle.

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Claims (14)

ΆΓΓ M T. - N t '* / A! _Rf £ A. 0Γ. T- ¹¹ JMCC Ki- R 27 W.srOCK.VAIR K. SCHUMANN P. H. JAKOB Dirt. i'iC G. BEZOLD OR HFM ναγ OPl CHtM. 8 MUNCHBN 22 MAXIMlLIANSTRASSe 43 Electrostatic A * a3fällapparat zuai removing suspended in air Partiksln, characterized by a housing (12) with e \ nim FirJ / ISS (14 x) and einsm Aualaß (16) is passed through the air, a high voltage electrode (18) arranged in the housing, a Sanmelelectrode (22) which is angsordnst in the housing (12) at a point in the vicinity of the high voltage electrode (18), where the Hoch3paiinung3- and Samciala electrodes (18, 22) to a voltage source (34) are connected, which between them applying a DC potential to provide a Koronaentladungahereich where ionization of the air takes place, and are driven in the charged particles to the collecting electrode (22) an electrical PEiD, and An additional collection means (32) having a direction opposite to the high voltage electrode (18) and polarity in the housing at a Stella otromabwärts voltage from the high and collecting electrodes (18, 22) is arranged. 2. Electrostatic precipitator according to claim 1, characterized in that the high-voltage electrode (18) einan 7098A5 / 10A0 ΤΕι, ΞγΟΝ (Ο »**) QQ233Q TELEX C5-QÖ3BO"f-r'.F.GRAP / MS MONAPAT TEUEKOPIERSR ORIGINAL INSPECTED 2719Q35 ϋι \ .ΰ> τ, including the corona chargeaberaicb. to be provided. 3 * SI Λτ ro static Auj * Uila ?? ar it for removing particles from the air in which the particles are suspended by: a housing (12) with a SinlaÖ (14) and an Aualaß (16) through which the air is passed, several spaced-apart Hoo2i3voltage electrodes (18), which in the housing (12) are arranged in the vicinity of the inlet (14) and each of which is equipped with a Xorona wire (20) is, a plurality of spaced collecting electrodes (22) contained in the housing are arranged in the vicinity of the inlet (14) in such a way that high-voltage electrodes and Alternate collecting electrodes, a voltage 3 source (34) which applies a direct current potential between the high voltage electrodes (18) and the Sana el electrodes (22) in order to prevent corona discharge between the corona wires (20) and Sarrjnel electrodes (22) and 3v; i3chen den H och Voltage 3 el aktroden (18) and the collecting electrodes (22) to generate electrical fields, and An additional collection means (32) having a direction opposite to the Entladungsalektroden (18) polarity and is arranged in the Gehäuae (12) at a location downstream of the high-voltage and collector electrodes, the particles, slide the collecting electrodes have happened to collect « 4 «electrostatic precipitator according to claim 3, characterized through an activated carbon filter (28) in the housing (12) downstream of the additional collecting device (32) is arranged to absorb the ozone generated in the corona discharge area. 5. Electrostatic precipitator according to claim 4, characterized 709845/1040 ORIGINAL INSPECTED It is noted that oils are made from the sa ^ aelaiarichtur-g (32a) Includes several spaced plates that are practically parallel sioj * Läe-g ^ achae Ö3j Grshiiuaea angaordnat are. (? ig.3) 6. Electrostatic precipitator according to claim 5 »thereby characterized in that each plate (32b, 32c) has grooves (35). 7. Electrostatic precipitator according to claim 6, characterized in that the grooves (35) of two adjacent ones Plates (32b) symmetrical about one between these two Plates lying imaginary plane (33a) are. (? ig.4A) 8. Electrostatic precipitator according to claim 6, characterized in that the grooves (35) of two adjacent ones Plates (32c) asymmetrical to one between these two Plates lying imaginary plane (33b) are. (Pig.4B) 9 · Electrostatic fall-off apparatus according to claim 4, characterized characterized in that the additional sanitary facility (32d, 32e) has a closed frame (36) which is arranged in such a way at said point in the interior of the housing is that it faces the inlet (14) and the outlet (16), and in which several intersecting partition walls (38, 40, 44) are arranged such that a plurality of compartments (42, 42a, 42b) are formed, each having an inlet and have an outlet facing the inlet or outlet of the housing. (Pig.5A, 5B) 10. Electrostatic precipitator according to claim 4, characterized in that the additional collecting device is a perforated body (32f, 32g, 32h) which can be a wire mesh or a perforated metal plate. 11. Electrostatic precipitator according to claim 10, characterized in that the perforated body on said Place is arranged in such a way that “an imaginary plane that 70984 5/1040 ORIGINAL INSPECTED a Be -f.enfläohs the perforated on bodies contains practically perpendicular to the axis of the housing. 12. Electrostatic precipitator according to claim 11, characterized characterized in that the perforated body (32g) as a Part of a housing for the activated carbon filter (28) is formed. (Fig. 7) 13. Electrostatic Auafällapparat according to claim 10, characterized characterized in that dsr perforated body (32h) such arranged X3t that it forms a housing for the activated carbon filter (28). (? ig.8) 14. Electrostatic Auafällapparat according to claim 4, characterized gekennaeichndt that the high voltage electrodes (18) and the collecting electrodes (22) are plates and that the collecting electrodes (22) are gas-earthed. 709845/1 (HO ORIGINAL INSPECTED