JP2017127818A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner capable of improving dust collection performance of a dust collection portion.SOLUTION: An air cleaner 1 is equipped with: an electric charge portion 41 charging dust included in air taken inside; and a dust collection portion 42 which collects the dust charged by the electric charge portion 41. The dust collection portion 42 is equipped with a plurality of platy electrodes 421 and 422 laminated at a predetermined interval, and a pair of high-voltage supply terminal 426 connected to the plurality of electrodes 421 and 422. The plurality of electrodes 421 and 422 includes a plurality of high-pressure electrodes 422 on which predetermined voltage is applied, and a plurality of capture electrodes 421 which are grounded to capture the charged dust. Each capture electrode 421 has a first projecting piece 421a projecting out in a width direction to one end side in a longitudinal direction of the dust collection portion 42 and connected to one of the pair of the high-voltage supply terminals 426. Each high-voltage electrode 422 has a second projecting piece 422a projecting out in the width direction to the other end side in the longitudinal direction and connected to the other of the pair of the high-voltage supply terminals 426.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an air cleaner equipped with an electric dust collector.

  Some air purifiers that suck indoor air and remove dust from the sucked air include an electric dust collector. The electrostatic precipitator is equipped with a charging unit that charges and charges the dust, and a dust collecting unit that collects the charged dust. It has low resistance to ventilation and is low in noise. It is easy to do.

  In the dust collector of the electrostatic precipitator, a plate-like high voltage electrode to which a high voltage is applied and a grounded plate-like dust collector electrode for collecting charged dust are laminated at a predetermined interval. ing. A conductor for applying a high voltage is connected to the high-voltage electrode, and a grounded conductor is connected to the collecting electrode. The conductor connected to each of the high-voltage electrode and the collecting electrode needs to be separated from the conductor by a predetermined distance from the electrode having a different polarity in order to prevent an electrical short circuit. Therefore, conventionally, the high-voltage electrode and the collection electrode are arranged by shifting by a predetermined distance in the longitudinal direction of the dust collection part (direction perpendicular to the ventilation direction), and the end part that is not opposed to the vertically adjacent electrodes of different polarities The conductors are connected in the region (for example, see Patent Document 1).

JP-A-11-90265

  However, in Patent Document 1, the high-voltage electrode and the collection electrode are arranged so as to be shifted from each other by a predetermined distance in the longitudinal direction of the dust collection unit, so that the high-voltage electrode and the collection electrode do not face each other and collect dust. There is a problem that the dust collection ability is lowered because of a dead space that cannot be performed. In addition, when the high-voltage electrode and the collecting electrode are arranged to be shifted in the longitudinal direction, the electrode support structure becomes complicated, and the manufacturing cost may increase.

  Therefore, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide an air cleaner that can minimize the dead space of the dust collection portion and enhance the dust collection capability.

  The present invention has been proposed in order to achieve the above object, and the invention of claim 1 is an air cleaner, wherein the charging unit charges the dust contained in the air taken inside, and the charging A dust collecting unit that collects dust charged by the unit, the dust collecting unit including a plurality of plate-like electrodes stacked at a predetermined interval, and a pair of conductors connected to the plurality of electrodes Each of the plurality of electrodes includes a plurality of high voltage electrodes to which a predetermined voltage is applied, and a plurality of collection electrodes that are grounded to collect charged dust. The collecting electrode has a first protruding piece protruding in the width direction on one end side in the longitudinal direction of the dust collecting part and connected to one of the pair of conductors, and each of the high-voltage electrodes is connected to the dust collecting part. A second protruding piece protruding in the width direction on the other end side in the longitudinal direction and connected to the other of the pair of conductors Characterized in that it has.

  The invention according to claim 2 is the air cleaner according to claim 1, further comprising a plurality of spacers arranged between the plurality of electrodes and maintaining a distance between the electrodes, wherein the protruding piece has a width of the electrode. It protrudes from the spacer in the direction.

  The invention according to claim 3 is the air cleaner according to claim 1 or 2, wherein the first projecting piece and the second projecting piece in each of the plurality of electrodes are connected to the conductor in a bent state. It is characterized by.

  ADVANTAGE OF THE INVENTION According to this invention, the air cleaner which minimizes the dead space of a dust collection part and can improve dust collection capability can be provided.

It is a schematic block diagram of the air cleaner which concerns on embodiment of this invention. It is a schematic block diagram of the electric dust collector which concerns on embodiment of this invention. It is a perspective view which shows the dust collection part of the electric dust collector which concerns on embodiment of this invention. It is an assembly exploded view showing the dust collection part of the electric dust collector concerning the embodiment of the present invention. It is a perspective view of a dust collection part collection electrode which constitutes a dust collection part of an electric dust collector concerning an embodiment of the present invention. It is a figure which shows the high voltage supply terminal which comprises the dust collection part of the electric dust collector which concerns on embodiment of this invention, (a) is a plane enlarged view of a high voltage supply terminal, (b) is a high voltage supply terminal. It is a perspective view. It is a connection structure of the electrode which comprises the dust collection part of the electric dust collector which concerns on embodiment of this invention, and a high voltage supply terminal, (a) is a collector which shows the state before inserting a high voltage supply terminal. The principal part expanded sectional view of a dust part, (b) is a principal part expanded sectional view of the dust collecting part which shows the state after inserting a high voltage supply terminal.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the drawings. Note that the same reference numerals are given to the same elements throughout the description of the embodiment.

  FIG. 1 is a schematic configuration diagram of an air cleaner according to an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of an electric dust collector according to an embodiment of the present invention. As shown in FIGS. 1 and 2, the air cleaner 1 includes a suction port 2 that sucks indoor air, a prefilter 3 that removes large dust from the sucked air, and air that has passed through the prefilter 3. A plurality of electrostatic precipitators 4 that electrically collect the dust, a deodorizing filter 5 that deodorizes the air that has passed through the electrostatic precipitator 4, and a fan 6 (blower that is disposed downstream of the deodorizing filter 5 ), A fan motor 7 that rotates the fan 6, an air outlet 8 that blows out air purified by the pre-filter 3, the electric dust collector 4, and the deodorizing filter 5, and the electric dust collector 4 and the fan motor 7. Power is supplied to the power supply control board 9 having the control unit 93 to be controlled, the high voltage power supply 10 for the charging unit that supplies power to the charging unit 41 of the electrostatic precipitator 4, and the dust collecting unit 42 of the electrostatic precipitator 4. A high-voltage power supply 11 for the dust collector; Comprising driving start operation, the operation stop operation, an operation display board 12 or the like is performed air volume setting, and dust sensor 13 for detecting the dust concentration is sucked from the suction port 2 air, the. The charging unit high-voltage power supply 10 supplies power to the charging unit 41 provided in each of the plurality of electrostatic precipitators 4, that is, the plurality of charging units 41, and supplies power to the charging unit high-voltage power supply 10. What is to be performed is the power supply unit 94 of the present invention.

  The air cleaner 1 sucks room air from the suction port 2 by the rotation of the fan 6 driven by the fan motor 7 and passes the air while passing through the prefilter 3, the electrostatic precipitator 4, and the deodorizing filter 5. Clean and blow out clean air into the room through the outlet 8.

  As shown in FIG. 2, the electric dust collector 4 includes a charging unit 41 and a dust collecting unit 42. The charging unit 41 has a predetermined interval between a charging unit discharge electrode 411 having a thin or sharp shape, such as a wire or a needle, and a flat charging unit counter electrode 412 having a different polarity from the charging unit discharging electrode 411. Are arranged alternately.

  The dust collection unit 42 includes a plurality of electrodes formed in a flat plate shape. The plurality of electrodes include a plurality of dust collecting part collecting electrodes 421 (collecting electrodes) and a plurality of dust collecting part high voltage electrodes 422 (high voltage electrodes), and these electrodes 421 and 422 are spaced at a predetermined interval. The plurality of dust collecting part collecting electrodes 421 and the plurality of dust collecting part high voltage electrodes 422 are electrically connected to different polarities of the dust collecting part high voltage power source 11.

  A high voltage is applied to the charged portion discharge electrode 411 and the charged portion counter electrode 412 of the charging portion 41 from the commercial power supply 14 via the power supply portion 94 by the charging portion high-voltage power supply 10. The charging unit high-voltage power supply 10 is driven and controlled by a control unit 93 mounted on the power supply control board 9 via charging unit switches 91a, 91b, and 91c.

  A high voltage is applied to the dust collection part collection electrode 421 and the dust collection part high voltage electrode 422 of the dust collection part 42 from the commercial power supply 14 via the power supply part 94 by the dust collection part high voltage power supply 11. The dust collector high-voltage power supply 11 is driven and controlled by a controller 93 mounted on the power supply control board 9 via a dust collector switch 92.

  Next, the dust collecting action in the electric dust collector 4 will be described.

  When a positive high voltage is applied to the charging part discharge electrode 411 of the charging part 41 and the charging part counter electrode 412 is connected to the ground electrode of the charging part high-voltage power supply 10, a corona discharge occurs. Air ions are charged with positively charged ions. Among these, the electrons reach the charged portion discharge electrode 411 and flow toward the charged portion high-voltage power supply 10. If the current in the entire charging unit 41 at this time is 0.025 mA, ions corresponding to this current value are filled between the electrodes. Further, in the case of the shape of the charged portion discharge electrode 411, for example, a wire shape, the wire diameter is set to 0.1 mm so that the voltage that stably causes the corona discharge so that the current becomes 0.025 mA is less than 5 kV. It is possible to set.

  When dust passes through the space filled with positive ions, the charge generated by the collision of ions and dust depends on the transit time and the strength of the electric field generated by the charged portion discharge electrode 411 and the charged portion counter electrode 412. Movement occurs, and dust is charged with a positive charge.

  On the other hand, when a predetermined voltage, for example, 5 kV is applied to the dust collector high voltage electrode 422 of the dust collector 42 and the dust collector collecting electrode 421 is connected to the ground electrode of the high voltage power supply 11 for the dust collector, If the distance between the electrodes is 2 mm, an electrostatic field of 25 kV / cm is formed. When the dust positively charged by the charging unit 41 moves to the dust collecting unit 42, it receives a force in the direction of being attracted to the dust collecting unit collecting electrode 421 having a polarity opposite to that of the dust by an electrostatic field.

  The dust floating in the air immediately reaches the terminal velocity due to the air resistance, and becomes a constant velocity motion having velocity components in the flow direction and the dust collecting portion collecting electrode 421 direction. The velocity component in the direction of the dust collecting portion collecting electrode 421 is proportional to the amount of electric charge of the dust and the electric field strength, and the dust collecting portion is within the passage time of the dust collecting portion 42 determined by the velocity in the flow direction and the depth of the dust collecting portion 42. Dust reaching the collection electrode 421 is collected. Since dust floating in the air is sufficiently small and affected by diffusion, some dust moves in a direction away from the dust collector electrode 421, and all dust is trapped while passing through the dust collector 42. Although not collected, the amount of dust that passes through the dust collecting section 42 without being collected decreases exponentially with the passage of time.

  Here, one of the methods for increasing the collection rate is to increase the charge amount of dust, and to increase the number of ions in the charging unit 41. In order to obtain a stable dust collection capability, the high voltage power supply 10 for the charged part is required to have a characteristic of keeping the voltage of the positive electrode applied to the charged part discharge electrode 411 constant.

Another method for increasing the collection rate is to increase the strength of the electric field of the dust collection part 42, and as high as possible within the range that does not cause abnormal discharge, the dust collection part high voltage electrode 422 and the dust collection part collection electrode 421 In order to maintain the potential difference between them, the high-voltage power supply 11 for the dust collection unit is required to have a characteristic of keeping the output voltage constant. Moreover, since the dust concentration of the air processed with a domestic air cleaner is as low as 0.1 mg / m ³ , for example, the current flowing depending on the amount of charge of dust collected by the dust collector 42 is small. The current capacity of the high-voltage power supply 11 may be as small as 0.01 mA, for example.

  Next, the dust collector structure of the present embodiment will be described with reference to FIGS. 3 to 7. First, the electrode stack structure of the dust collector 42 will be described with reference to FIGS. 3, 4, and 5. .

  FIG. 3 is a perspective view showing the dust collecting portion 42 of the electric dust collector 4 according to the embodiment of the present invention, and FIG. 4 is an assembly showing the dust collecting portion 42 of the electric dust collector 4 according to the embodiment of the present invention. FIG. 5 is an exploded view, and FIG. 5 is a perspective view of a dust collecting part collecting electrode 421 that constitutes the dust collecting part 42 of the electric dust collector 4 according to the embodiment of the present invention. As shown in FIGS. 3 to 5, the dust collecting unit 42 includes a dust collecting unit case 423, a dust collecting unit cover 424, and a separator 425 in addition to the dust collecting unit collecting electrode 421 and the dust collecting unit high voltage electrode 422 described above. , A high voltage supply terminal 426 (conductor), a spacer 427, and the like.

  In the dust collector case 423, the dust collectors shown in FIG. 4 are arranged at both ends in the longitudinal direction so that the flat dust collector electrodes 421 shown in FIG. A guide portion 423a that is opened in an L-shape is provided upright in the vertical direction of the case 423. When assembling the dust collection part 42, first, a single dust collection part collecting electrode 421 is inserted in accordance with the guide part 423 a and disposed on the bottom of the dust collection part case 423.

  The dust collection part collecting electrode 421 is a plate-like rectangle, and has a first projecting piece 421a that projects in the width direction on one end side in the longitudinal direction of the dust collection part 42 (left side in the left-right direction in FIG. 4). In this embodiment, the 1st protrusion piece 421a protrudes from the rectangular area | region of the dust collection part collection electrode 421 to the windward side.

  In FIG. 4, the tip of the first protruding piece 421a is bent downward by 90 °, but this shows a bent state after assembly, and is bent when inserted into the dust collector case 423. Not. In addition, among the dust collecting part collecting electrodes 421 inserted into the dust collecting part case 423, the first protruding piece 421a of the dust collecting part collecting electrode 421 that is inserted first has the tip part even after the assembly is completed. It won't bend.

  Next, two spacers 427 made of a plate-like L-shaped insulator, which are positioned by the guide portion 423a, are inserted into the respective guide portions 423a and arranged on both ends in the longitudinal direction of the dust collecting portion collecting electrode 421. To do. The spacer 427 is positioned by the guide portion 423a. The long side of the spacer 427 that is parallel to the width direction of the dust collecting part collecting electrode 421 is longer than the width of the rectangular region of the dust collecting part collecting electrode 421 and shorter than the length including the first protruding piece 421a. Is formed. Therefore, when the dust collector case 423 is viewed from the opening direction (above), the tip of the first protruding piece 421a of the dust collector electrode 421 is exposed without being hidden by the spacer 427.

  Subsequently, one dust collecting portion high-voltage electrode 422 is inserted in accordance with the guide portion 423 a, and both end portions in the longitudinal direction are overlapped on the spacer 427. The dust collection unit high-voltage electrode 422 is a plate-like rectangle and has a second projecting piece 422a projecting in the width direction, like the dust collection unit collection electrode 421, but the second projection of the dust collection unit high-voltage electrode 422. Opposite to the first projecting piece 421a of the dust collecting part collecting electrode 421, the piece 422a projects to the windward side at the other end side in the longitudinal direction of the dust collecting part 42 (right side in the left-right direction in FIG. 4). Is formed.

  In FIG. 4, the tip of the second projecting piece 422a is bent downward by 90 °, but this shows a bent state after assembly, and it is bent when inserted into the dust collector case 423. Not.

  Subsequently, the dust collecting portions in the order of two spacers 427, one dust collecting portion collecting electrode 421, two spacers 427, one dust collecting portion high voltage electrode 422, two spacers 427,. After sequentially inserting into the case 423 and stacking, and finally inserting the dust collecting part collecting electrode 421, the dust collecting part cover 424 is placed and fixed to the upper end surface of the guide part 423a.

  Next, a connection structure between the electrodes 421 and 422 constituting the dust collecting portion 42 and the high voltage supply terminal 426 will be described with reference to FIGS.

  As shown in FIGS. 3 and 4, the dust collecting unit cover 424 has two notches 424 a that open above the gap between the inner surface of the guide unit 423 a of the dust collecting unit case 423 and the front end of the spacer 427. . The two notches 424 a form an insertion port for inserting the pair of high voltage supply terminals 426 after the dust collector cover 424 is fixed to the dust collector case 423.

  FIG. 6 is a view showing the high voltage supply terminal 426 constituting the dust collecting portion 42 of the electric dust collector 4 according to the embodiment of the present invention, (a) is a top view of the high voltage supply terminal 426, (b) ) Is a perspective view of a high voltage supply terminal. As shown in FIG. 6, the high voltage supply terminal 426 is a long conductor formed by bending a sheet metal so that the cross section is C-shaped. Are inserted into the two notches 424a of the dust collector cover 424 from above. Since the length in the depth direction of the high voltage supply terminal 426 having springiness is formed slightly longer than the length in the depth direction of the gap between the front end of the inner surface of the guide portion 423a and the front end of the spacer 427, Inserted while being compressed and deformed. Further, the high voltage supply terminal 426 is made of a metal having good conductivity, for example, and has high rigidity on the axis in the insertion direction. Since the two high voltage supply terminals 426 on the left and right sides are connected to the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422, the dust collecting part collecting electrode 421 is grounded, and the dust collecting part high voltage electrode 422 is high. A voltage is applied.

  FIG. 7 shows a connection structure of the dust collecting part collecting electrode 421, the dust collecting part high voltage electrode 422, and the high voltage supply terminal 426 constituting the dust collecting part 42 of the electric dust collector 4 according to the embodiment of the present invention. 4A is an enlarged cross-sectional view of the main part of the dust collecting portion 42 showing a state before the high voltage supply terminal 426 is inserted, and FIG. 4B is a collection showing the state after the high voltage supply terminal 426 is inserted. 4 is an enlarged cross-sectional view of a main part of a dust part 42. FIG. As shown in FIG. 7, the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422 are thin sheets and are formed of a flexible material such as a resin. Therefore, the high voltage supply terminal 426 is provided. As a result, the leading ends of the first and second protruding pieces 421a and 422a bend downward with the front end position of the spacer 427 as a fulcrum.

  The high voltage supply terminal 426 generates an elastic restoring force that repels against compression due to the force of the sheet metal bent in a C shape to open, and the inner surface of the guide portion 423a and the first protruding piece 421a or The two protruding pieces 422a are pressed in the width direction of the dust collecting portion 42. As a result, the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422 are electrically connected.

  As shown in FIG. 7, it is desirable that the spacer 427 has a rounded portion 427a (curved surface portion) at the upper end corner of the front end serving as a fulcrum for bending the first protruding piece 421a and the second protruding piece 422a. According to the rounded portion 427a, when the high voltage supply terminal 426 is inserted, the leading ends of the first protruding piece 421a and the second protruding piece 422a bend downward with the front end position of the spacer 427 as a fulcrum. Since the load acting on the bent portions of the first projecting piece 421a and the second projecting piece 422a can be dispersed, damage to the bent portions of the first projecting piece 421a and the second projecting piece 422a can be suppressed.

  Since both the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422 are thin and flexible, a high electric field is generated between the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422. In addition, due to the Coulomb force, the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422 are deformed in a direction approaching each other, and the high electric field between the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422 is partially increased. Become. However, since the dust collecting portion 42 needs to form a uniform equal electric field in order to exhibit a good dust collecting ability, the teeth of the comb-like separator 425 are used to prevent the deformation of both the electrodes 421 and 422. The portion is disposed between the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422. In the dust collecting part 42 of the present embodiment, three separators 425 along the thickness direction of the electrodes 421 and 422 are inserted between the electrodes 421 and 422 at a predetermined interval in the longitudinal direction of the electrodes 421 and 422. ing.

  The dust collecting part 42 is arranged such that the first projecting piece 421a and the second projecting piece 422a of the dust collecting part collecting electrode 421 and the dust collecting part high voltage electrode 422 are directed to the windward side, and the charging part 41 is disposed on the windward side thereof. Thus, the electric dust collector 4 is configured. When laminating the dust collecting portion collecting electrode 421 and the dust collecting portion high voltage electrode 422, the respective portions facing each other in the laminating direction, that is, the rectangular portions are regions that form an electric field contributing to dust collection, and the respective first protrusions The piece 421a and the second protruding piece 422a do not contribute to the electric field formation.

  Each of the electrodes 421 and 422 is made of a high-resistance material such as a resin, or a high resistance is inserted between the electrodes 421 and 422, so that a discharge current is suppressed between the electrodes 421 and 422 and the spatial distance is reduced. can do. However, each of the high voltage supply terminals 426 requires a spatial distance that does not cause discharge between the electrodes 421 and 422 of different polarities that are not connected. When the potential difference between the electrodes 421 and 422 is 5 kV, the spatial distance needs to be at least 5 mm. Furthermore, in consideration of when the resistance value of the electrodes 421 and 422 decreases due to the dirt and humidity on the surfaces of the electrodes 421 and 422 or when the insulation of the air changes due to the temperature and humidity environment, it is desirable to secure a spatial distance of 10 mm. .

  In the present embodiment, as shown in FIG. 7, the protruding length L1 of the first protruding piece 421a and the second protruding piece 422a of each electrode 421, 422 is 13 mm, and the rectangular portion of the electrodes 421, 422, that is, the electric field The protrusion length L2 of the spacer 427 from the front end of the region where the is formed is 10 mm. Thereby, the position bent by the high voltage supply terminal 426 becomes a length L3 of 3 mm from the tips of the first protruding piece 421a and the second protruding piece 422a, and the electrical contact is performed over a length of 3 mm. In addition, an insulation distance L4 between the ends of the electrodes 421 and 422 and the high voltage supply terminal 426 having a different polarity is secured by 10 mm.

  Further, the space formed between the first projecting piece 421a and the second ejection piece is a place where the air ions generated by the charging unit 41 and the dust to be removed come into contact with each other, increasing the charge amount of the dust and collecting the dust. It can contribute to the improvement of ability. By allocating this portion to a space that is normally provided between the charging unit 41 and the dust collecting unit 42, it is possible to suppress an increase in the size of the electric dust collector 4 as a whole.

  According to the air cleaner 1 of the present embodiment described above, each dust collector high voltage electrode 422 protrudes in the width direction on one end side in the longitudinal direction of the dust collector 42 and is connected to one high voltage supply terminal 426. A second projecting piece 422a, and each dust collecting part collecting electrode 421 projects in the width direction to the other end side in the longitudinal direction of the dust collecting part 42 and is connected to the other high voltage supply terminal 426. Since the first protruding piece 421a is provided, the electrode 421 having a polarity different from that of the high voltage supply terminal 426 can be obtained without arranging the dust collector high voltage electrode 422 and the dust collector collecting electrode 421 in the longitudinal direction as in the prior art. , 422 can be ensured, and as a result, the dead space of the dust collecting portion 42 is minimized and the dust collecting ability is enhanced.

  Moreover, according to such a dust collecting part 42, compared with the case where the dust collecting part high voltage electrode 422 and the dust collecting part collecting electrode 421 are shifted in the longitudinal direction, the support structure of the electrodes 421 and 422 is simplified. Thus, the manufacturing cost can be reduced.

  The dust collecting part 42 is further provided with a plurality of spacers 427 that are disposed between the plurality of electrodes 421 and 422 and maintain a distance between the electrodes 421 and 422, and the first protruding piece 421a and the second protruding piece 422a are Since it is arranged on the windward side of the spacer 427 that does not contribute to dust collection, a predetermined distance is secured between the high voltage supply terminal 426 and the electrodes 421 and 422 having different polarities using the windward space of the spacer 427. In addition, the high voltage supply terminal 426 does not interfere with dust collection.

  In addition, a space for arranging the first protruding piece 421a, the second protruding piece 422a, and the high voltage supply terminal 426 is generated between the charging unit 41 and the dust collecting unit 42. Therefore, it is possible to increase the amount of electrification of dust and contribute to the improvement of dust collection ability.

  The high voltage supply terminal 426 is formed in a long shape that can be inserted into the dust collecting portion 42 along the stacking direction of the electrodes 421 and 422, and the first projecting piece 421 a and the second projecting piece 421 a are inserted into the dust collecting portion 42. The high voltage supply terminal is in contact with the protruding piece 422a, and the first protruding piece 421a and a part of the second protruding piece 422a are bent with the spacer 427 as a fulcrum by contact with the inserted high voltage supply terminal 426. Since it is connected to 426, it is possible to reduce the manufacturing cost by eliminating the need for bending as compared with the case where the first protruding piece 421a and the second protruding piece 422a are partially bent in advance.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications may be made within the scope of the gist of the present invention described in the claims. It can be changed.

  DESCRIPTION OF SYMBOLS 1 ... Air cleaner, 10 ... High voltage power supply for charged parts, 11 ... High voltage power supply for dust collecting parts, 12 ... Operation display board, 13 ... Dust sensor, 14 ... Commercial power supply, 2 ... Suction port, 3 ... Pre filter, 4 DESCRIPTION OF SYMBOLS ... Electric dust collector, 41 ... Charge part, 411 ... Charge part discharge electrode, 412 ... Charge part counter electrode, 42 ... Dust collection part, 421 ... Dust collection part collection electrode, 421a ... First protrusion piece, 422 ... Collection Dust high voltage electrode, 422a ... second protruding piece, 423 ... dust collecting case, 423a ... guide, 424 ... dust collecting cover, 424a ... notch, 425 ... separator, 426 ... high voltage supply terminal, 427 ... spacer 427a ... Earl part, 5 ... Deodorizing filter, 6 ... Fan, 7 ... Fan motor, 8 ... Air outlet, 9 ... Power supply control board, 91a-91c ... Charging part switch, 92 ... Dust collecting part switch

Claims (3)

An air purifier,
A charging unit for charging dust contained in the air taken inside,
A dust collecting part for collecting dust charged by the charging part,
The dust collecting part is
A plurality of plate-like electrodes stacked at predetermined intervals;
A pair of conductors connected to the plurality of electrodes,
The plurality of electrodes are:
A plurality of high voltage electrodes to which a predetermined voltage is applied;
A plurality of collecting electrodes that are grounded to collect charged dust,
Each of the collecting electrodes has a first protruding piece that protrudes in the width direction on one end side in the longitudinal direction of the dust collecting portion and is connected to one of the pair of conductors.
Each said high voltage electrode has the 2nd protrusion piece which protrudes in the width direction on the other end side of the longitudinal direction of the said dust collection part, and is connected to the other of said pair of conductors, The air cleaner characterized by the above-mentioned. A plurality of spacers disposed between the plurality of electrodes and maintaining a distance between the electrodes;
The air cleaner according to claim 1, wherein the protruding piece protrudes from the spacer in the width direction of the electrode.   The air cleaner according to claim 1 or 2, wherein the first projecting piece and the second projecting piece in each of the plurality of electrodes are connected to the conductor in a bent state.

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