Electrostatic dust collector

Abstract: The present electrostatic dust collector includes a front case and a rear case. A discharging electrode plate (4) and a electrical charge plate (5) are arranged along the certain protrusions (7a, 8a, 7b, 8b) formed in the front case, and a dust collecting part is installed under the discharging electrode plate and the electrical charge electrode plate, and also installed on the rear case parallel to the dust-collecting part and finally an active carbon filter is installed in the rear case in order to eliminate the odor contained in the air.

Description: BACKGROUND OF THE INVENTION 1. Field of the invention The present invention relates to a electrostatical dust collector and more particularly to an arrangement of the discharging and charging electrodes of an electrostatical dust collector used in an air-conditioner or an air purifier. 2. Discription of the prior art In an ordinary electrostatical dust collector used for the air conditioner or the air purifier, it is mounted in the front and it collects the charged dusts on the charging plate immediately after disturbing and charging the dust particles sucked into the air conditioner or air purifier. The arrangements of a discharging electrode plate and of a charged plate functioning as dust collecting filter of the conventional electrostatically operated dust collector,are disclosed in U.S. patent No.4,323,374. It is related only to the material of charged plate or dust-collecting filter in order to increase the dust-collecting efficiency of the charged plate. Also, as an arrangement similar to U.S. patent No.4,323,374, a conventional electrostatical dust collector is shown in Fig.1. As shown in Figs.1 and 2, the conventional electrostatical dust collector 10 comprises a dust collecting guide 17 and electrostatic dust collector installed on both sides of the guide 17. The dust collecting guide 17 is provided with a negative electrode terminal 19, positive electrode terminal 20, a negative cable 18 connected to the negative electrode terminal 19, and a positive cable 21 connected to the positive electrode terminal 20. And the electrostatical dust collecting parts 16 comprises an electrostatical charge plate 14 used as a dust collecting filter which is electrically connected to the negative cable 18, a discharging electrode plate 15 which is electrically connected to the positive electrode cable 21, and an active carbon filter 13. The active carbon filter 13 is in contact with the rear case 12 of an electrostatical dust collector 10 and absorbs the odor contained in the air. The electrostatical charge plate 14 and the discharging electrode 15 are provided between the active carbon filter 13 and the front case of the electrostatical dust collecting parts 16. The dust particles directed as shown in arrow into the air-conditioner or the air purifier, are positively ionized and absorbed on the electrostatical charge plate 14 when passing between the discharging electrode 15 and the electrostatical charge plate 14. Fig.3 shows a definite constitutional relation of the discharging electrode 15 and the electrostatical charge plate 14 in Fig.1 and Fig.2. As shown in Fig.3, the discharging electrode 15 has the form of an upright zigzag, while the electrostatical charge plate 14 is arranged in a horizontal zigzag form without any contact among the discharging electrodes 15. A conventional electrostatical dust collector has such a constitution that a electrostatical charge plate 14 folded in a zigzag form has to be inserted between the discharging electrode 15, therefore it requires a considerable manpower in its manufacturing,increase the product cost and may cause short-circuit between the discharging electrode 15 and the electrostatical charge plate 14. DE-A-1 632 442 discloses an electrostatical dust collector with an inlet part and an outlet part between which a housing is arranged. In this housing the exact folded electrodes are fixed to supports whereby a porous barrier is guided between the two electrodes by deflector rolls. The distance between the barrier and the negative electrode is smaller than the distance between the barrier and the positive electrode. In this way the barrier should be also negatively charged for dust collecting. Moreover, a number of openings are formed in the two electrodes for guiding air between inlet and outlet. Between the support for the negative electrode and the outlet an active carbon filter is arranged. Furthermore, a supply reel and a pick-up reel are arranged for supplying a new barrier and for picking-up that part of the barrier that already collected dust. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electrostatical dust collector which is easy to manufacture, lower in cost and in which any danger of short-circuit is eliminated. In order to achieve the above object, the electrostatical dust collector according to the invention comprises the features as outlined in claim 1. Advantageous embodiments of the invention are disclosed by the subclaims. Because the electrostatical dust collector according to the invention has a plurality of protruder rods arranged in the front case and also the discharging electrode plate and the charge plate are arranged facing each other, they do not contact each other and therefore there is no danger of a short-circuit, it is easy to manufacture, lower in manufacturing costs, easy to install since the dust collecting part is a plate form, and the dust collecting efficiency is increased since the dust collecting section can be installed separately on the rear face case. BRIEF DESCRIPTION OF THE DRAWINGS Fig.1 is a plan view of the prior art. Fig.2 is a section taken along line II-II' of Fig.1. Fig.3 is a perspective view embodying the constitutional relation of the discharging electrode and the electrostatical charge plate of the prior art. Fig.4 is a front view of the electrostatical dust collector, according to this present invention. Fig.5 is a section taken along line V-V' of Fig.4. Fig.6 is a perspective view embodying the constitutional relation of the discharging electrode plate and the electrostatical charge plate according to the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENT As shown in Figs.4 and 5, the electrostatical dust collector 1 according to the invention comprises a front case 2 and a rear case 3. The front case 2 has plurality of protrusions 7a, 7b, 8a, 8b arranged in two rows, at regular intervals in the upper and lower regions thereof as shown in Fig.4. A discharging electrode plate 4 connected to a high voltage positive electrode 9a is arranged by being wound on the upper outer protrusions 7a and the lower inner protruded rod 8b, also a electrostatical charge plate 5 connected to the ground 9b is arranged by being wound on the lower outer protruded rods 7b and the upper inner protrusions 8a. It is preferred that the upper and lower protrusions 7a, 7b, 8a, 8b are arranged at equal intervals and also the lengthwise distance X between the outer protrusions 7a, 7b and the inner protrusions 8a, 8b is arranged to be shorter than the widthwise distance Y, therebetween. The discharging electrode plate 4 connected to a high voltage positive electrode 9a is bended over two upper protruded rods, and is bended over the lower inner protrusions 8b and then toward next upper outer protrusions 7a, repeatedy. Meanwhile, the electrostatical charge plate 5 connected to the ground 9b is bended over two lower outside protrusions 7b and is bended over the upper inner protrusions 8a and is then toward lower outer protrusions 7b, repeatedly. By these method of arrangement, there is no contact between the discharging electrode plate 4 and the electrostatical charged plate 5 and at the same time certain interval therebetween can be maintained. The dust entrained in the air is positively ionized by the discharging electrode plate 4 connected to the positive electrode at the time of passing between the discharging electrode plate 4 and the electrostatical charge plate 5, the dust collecting part 6 reversely polarized from the discharging electrode plate 4 is installed closely to the rear edges of the discharging electrode plate 4 and the electrostatical charge plate 5. That is to say, the dust collecting part 6 has a negative polarity and a flat plate form. An activ carbor filter 7 used for eliminating any odor contained in the air is arranged in back of the dust collecting part 6 and installed on the rear case 3 in parallel to the dust collecting part 6. Accordingly, any dust and odor contained in the air are sucked into the electrostatical dust collector 1 the dust is ionized to a positive polarity by the discharging electrode plate 4 having a high-voltage (3-4 KV) positive polarity and then collected on the dust collecting part 6 having a negative polarity, whereas the odor is eliminated by the activated carbon filter 7, and finally a fresh air is only discharged into the room. Referring to Fig.6 in a preferred embodiment of the present invention, the protruded rods 7a, 7b, 8a, 8b are protruded about the width W of the front case 2 from the said front case 2 or are slightly shorter and maintain a certain form. Hence, the discharging electrode plate 4 and the electrostatical charge plate 5 are arranged along the protruded rods 7a, 7b, 8a, 8b to not contact each other and keep certain form of arrangement. The electrostatical charge plate 5 of the present invention can be used as a dust collecting plate as in the case of a prior art. In this case, the electrostatical charge plate 5 is connected to the negative electrode of a high voltage source, hence the dust collecting section 6 can be omitted.

Claims: An electrostatical dust collector (1) comprising: a dust collecting case (2,3) including a front case (2) and a rear case (3), and a respective voltage source, and an active carbon filter for eliminating the odour contained in the air; characterised in that a plurality of protrusions (7a, 7b, 8a, 8b) is each arranged in two rows at regular intervals in the inner upper and lower regions inside said front case (2); a discharging electrode plate (4) arranged by being bent over two upper outer protrusions (7a) and one inner lower protrusion (8b) repeatedly and extended along the upper outer protrusions (7a) and the lower inner protrusions (8b) and connected to the positive pole of the high-voltage source for ionising the dust entrained in the air into a positive polarity; a second electrode plate (5) arranged by being bent over two lower outer protrusions (7b) and one inner upper protrusion (8a) repeatedly and extended along the lower outer protrusions (7b) and said upper inner protrusions (8a) and connected to the other pole of the high-voltage source; the active carbone filter (7) is positioned in contact with the rear edges of said discharging electrode plate (4) and second electrode plate (5). An electrostatical dust collector as in claim 1, characterised in that the other pole carries negative voltage. An electrostatical dust collector as in claim 1 , characterised in that other pole is grounded and the dust collecting part (6) is connected to the negative electrode of the high-voltage source for collecting the ionised dust in the air being guided between said discharging electrode plate and the second electrode plate and which dust collecting part is positioned close to the rear edges of said discharging electrode plate (4) and said second electrode plate (5). An electrostatical dust collector as in claims 1 to 3 , characterisid in that said protrusions (7a, 7b, 8a, 8b) are formed intergrally in said front case (2). An electrostatical dust collector as in claims 1 to 4, characterisied in that the lengthwise distance (X) between said outer protrusions (7a, 7b) and said inner protrusions (8a, 8b) is shorter than the widthwise distance (Y) therebetween. An electrostatical dust collector as in claims 1 to 5, characterised in that the length (W) of said protrusions (7a, 7b, 8a, 8b) is either equal or sligthly shorter than the inner width of the said rear case (3).

Inventors: JANG JUN-UI, JANG, JUN-UI
Applicants: SAMSUNG ELECTRONICS CO LTD, SAMSUNG ELECTRONICS CO., LTD.
Application year: 1992
Main classification: B03C3
IPC codes: B03C3, F24F1