JP2753332B2 - Electric dust collector type air purifier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electrostatic precipitating air purifier having a discharge electrode portion.

[Prior Art] FIG. 17 shows a principle diagram of electric dust collection, in which a discharge electrode 62 is disposed between a counter electrode 61 and a filter made of polypropylene fiber.
A ground electrode 64 provided with 63 and a counter electrode 61 have the same potential, and a power supply 65 is connected between these and the discharge electrode 62. Garbage is a discharge electrode
It is charged by corona discharge between 62 and the counter electrode 61. Since the polypropylene is polarized, dust on the side of the polypropylene is sucked and collected by Coulomb force. The arrows in the figure indicate the flow of air.

FIG. 18 shows a discharge electrode portion of a conventional electrostatic precipitating air purifier, in which a counter electrode 61 disposed between linear discharge electrodes 62 is formed in a substantially U-shape. An electric field is not generated between the ground electrode 64 and the ground electrode 64 (portion X in the figure), so that the polypropylene fiber of the dust filter 63 below the counter electrode 61 is not polarized (portion Y in the diagram), and the collection efficiency of this portion is reduced. Is low, and the entire filter 63 is not used effectively. Since the Z portion in the figure is between the discharge electrode 62 and the ground electrode 64, an electric field is generated. Therefore, the polypropylene fiber is polarized corresponding to this portion.

[Problems to be Solved by the Invention] On the other hand, as shown in FIG.
In the case of a flat plate, there is no problem because the polarization of the filter 63 is made entirely. However, the number of linear discharge electrodes 62 increases, and the discharge current increases. Then, the amount of generated ozone increases. A large amount of ozone is harmful to the human body and must be reduced (0.1 PPM or less according to environmental standards). Therefore, the configuration as shown in FIG. 19 cannot be adopted, and the configuration as shown in FIGS. 18 and 20 has been adopted.
In FIG. 20, a discharge needle 66 is provided at the tip of the discharge electrode 62 as shown in FIG. Further, if the discharge electrode 62 is linear, the discharge electrode 62 becomes thin, but there is a problem that the discharge electrode 62 is cut. Further, when the discharge needle 66 of the discharge electrode 62 is set in the vertical direction, there is a problem that the discharge needle becomes thick.

The present invention has been provided in view of the above points,
An object of the present invention is to provide an electrostatic precipitating air purifier that aims to effectively use a filter, extend the life of the filter, and reduce the thickness.

Means for Solving the Problems The present invention has a suction part on the front surface, a plurality of plate-shaped counter electrodes perpendicular to the filter arranged at intervals on the front surface of the dielectric filter, and A discharge electrode having a flat plate shape and being parallel to the filter is disposed between the counter electrodes of the electrodes, and one of the discharge electrode and the counter electrode has a discharge needle portion protruding toward the other.

[Operation] With the above configuration, the discharge is caused by the discharge needle portion to generate polarization over the entire filter, and the filter is used effectively.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. First, the structure of the air purifier will be described. 10 shows a front view, FIG. 11 shows a sectional view taken along line AA of FIG. 10, FIG. 12 shows a sectional view taken along line BB of FIG. 10, and FIG. 13 shows a sectional view taken along line CC of FIG. The sectional views are respectively shown. In FIG. 11, a boss 2 is protruded from the rear side substantially at the center of the main body 1, and a flat metal fitting 3 is fixed to the boss 2 with a screw 4. An induction motor 6 is fixed to the fixing bracket 3 via a vibration isolating rubber 5. A sirocco fan 8 is fixed to an output shaft 7 of the motor 6 by a nut 9. A wind tunnel casing 11 is disposed between the outer periphery of the fan 8 and the inner periphery of the housing 10 so that the fan 8 rotates to suck and discharge air.

On the front side of the main body 1, a grill 12, a deodorizing filter 13,
A dust filter 14 and a pre-filter 15 are provided. The deodorizing filter 13 and the dust removing filter 14 are set between the filter cases 16 and 17, and are detachable from the main body 1 by grasping the handle 18 of the filter case 17. An electrode portion is disposed between the pre-filter 15 and the filter case 17, and a positive electrode 20 and a negative electrode 21 are disposed and fixed at an interval by a holding frame 19 of the electrode portion.

In FIGS. 10 and 13, a moving object detection sensor 22 is provided at a lower portion on the right side of the front surface of the main body 1. Further, a reset push button 23 of a filter life sign and a moving object detection sensor A switch 24 for turning on and off 22 is provided. By switching the switch 24, the moving object detection sensor 22 can be used in combination with a gas sensor, or can be cut off to use only the gas sensor alone.
Each time the manual switch 25 is pressed, the operation mode can be switched. Furthermore, the remote control receiving unit 26
Is provided so that the microcomputer can switch to each operation mode by receiving an infrared carrier wave from the remote control transmitter.

The automatic operation display lamp 27, the timer operation state display lamp 28, the filter replacement sign lamp 29, and the turbo operation display lamp 30 shown in FIGS. And a diffusion sheet 32. A smoke acrylic plate 33 is provided on the front surface of the display to display pictograms for operation. The smoke acrylic plate 33 also serves as a light receiving filter of the remote control receiver.

Behind the operation stop switch 34 shown in FIG. 10, a tact switch is provided and connected to the microcomputer. When the operation stop switch 34 is pressed once, only the lamp for displaying the degree of contamination in the room is turned on, and all other functions are turned off. Pressing it once more also turns off the dirt level display, and pressing it again turns only the display on.

Each time the manual switch 25 is pressed, the standard automatic
Powerful automatic, silent automatic, operation mode I, II, III, I
Switches between V, V, turbo operation, and off. The automatic operation display lamp 27 is turned on only when the above three automatic operations are performed. The timer operation state display lamp 28 is turned on only when the air purifier is running on the timer, and the filter replacement sign lamp 29 is turned on after a certain period of time has elapsed after the filters 13 and 14 have been inserted. The lamps 35 to 39 composed of light emitting diodes for displaying the mode selection at the time of manual operation and the state of each operation mode are as follows.

In operation mode I, lamp 35 lights up In operation mode II, lamp 36 lights up In operation mode III, lamp 37 lights up In operation mode IV, lamp 38 lights up In operation mode V, lamp 39 lights up When the operation mode is turbo, the lamp 30 is turned on. Further, six lamps 41 to 46 for displaying the degree of contamination in the room are provided beside the lamps 35 to 39. These lamps 41 to 46 are sequentially lit as the degree of dirt increases from a low degree of dirt.
All the lamps 41 to 46 are turned on and display is performed.

As shown in FIG. 13, a gas sensor 47 is disposed on the upper right side of the front surface of the main body 1, and is mounted on a printed circuit board 48 on which a CPU and the like are mounted. This gas sensor
A sensor cap 49 and a gap seal 50 are provided around 47, and a gas sensor grid 51 is provided on a part of the front surface of the grill 12, as shown in FIG. It is easy to invade the sensor part.

Further, as shown in FIG. 12, circuit components including a power transformer 53 are mounted on a printed circuit board 52 on the rear side of the main body 1 and are disposed outside the spiral curve of the wind tunnel casing 11. On the front side of the wind tunnel casing 11, the printed circuit board 48
The printed circuit board 48 has a microcomputer and other control circuit components mounted thereon.

A tact switch is provided below the filter life sign reset push button 23. By pressing the tact switch, the timer time in the memory of the microcomputer is reset. As shown in FIG. 15, a discharge port 54 is provided on the upper surface of the main body 1, and a high voltage generating unit 55 is provided on the upper part of the main body 1 as shown in FIG. The generating unit 55 has a printed circuit board
Input and apply DC voltage from 52. Output voltage is +65
00V to 7000V is applied to the plus electrode 20 of the electrode plate, and the minus side is connected to the minus electrode 21 of the electrode plate.

In addition, as shown in FIG.
A conductive adhesive is adhered to the entire back surface of the inside dust filter 14 with a binder. An electrode plate 56 is attached to the filter frame so as to contact the surface of the conductive adhesive. The electrode plate 56 is connected to the negative side of the high-voltage generation unit 55 via an electrode plate in a filter storage section of the wind tunnel casing 11.

Next, the discharge electrode part which is the gist of the present invention will be described. FIG. 1A shows a discharge electrode 20a as a positive electrode 20.
And a perspective view of a pair of counter electrodes 21a as negative electrodes. FIG. 1 (b) shows a sectional view of the discharge electrode portion. The discharge electrode 20a is formed in a flat plate shape, and a large number of discharge needles 57 are arranged in a row at a side edge. The counter electrode 21a is also formed in a flat plate shape, and the counter electrode 21a is disposed in the vertical direction between the discharge electrodes 20a disposed at intervals in the horizontal direction. The discharge electrode 20a is formed wide. Connection terminals at the ends of the discharge electrode 20a and the counter electrode 21a
58 and 59 are provided respectively. As shown in FIG. 1 (b),
Above (front side) the corrugated ground electrode 21b, a wave-side dust filter 14 is disposed, the ground electrode 21b and the counter electrode 21a are connected to the negative side of the power supply 65, and the discharge electrode 20a is connected to the power supply 65. Connected to the positive side of

FIG. 2 shows an overall perspective view of the discharge electrode portion, and shows the discharge electrode 20.
“a” is supported and fixed to the holding frame 19 by the support plate 71, and the counter electrode 21a is disposed by being fitted into the slit 72 of the support frame 19. As shown in FIG. 3, a hole 73 is formed in the discharge electrode 20a, and a projection 74 inserted into the hole 73 is provided on the support plate 71,
The projection 74 of the support plate 71 is inserted into the hole 73 of the discharge electrode 20a and is joined by thermal caulking. The discharge needle 57 may be provided on the counter electrode 21a side.

As shown in FIG. 1 (b), the discharge needle portion 57 of the discharge electrode 20a
, A corona discharge is generated by applying a high voltage of 6500 V from the power supply 65. With this configuration, the counter electrode 21
An electric field is generated between a and the dust filter 14, the polypropylene fibers of the dust filter 14 are polarized, and the dust on the polypropylene side is collected by the Cloning force.

FIG. 4 shows a second embodiment, in which a long hole 75 is formed in the center of the discharge electrode 20a in the longitudinal direction. This is because if the discharge electrode 20a is a flat plate, the electric field strength is small,
A hole 75 is opened to increase the electric field strength, and the hole 75
The electric field strength is increased by the edge of the end face of the above. This is because the provision of the peaks increases the electric field intensity in the peaks because the peaks have a high charge density.

FIG. 5 shows a third embodiment in which a number of holes 76 which are not long holes are formed. Many holes 76 are formed to form many edge portions.

FIG. 6 shows a fourth embodiment, in which the discharge electrode 20a is drawn to form a narrowed portion 77, and the narrowed portion 77 has a square hole shape. By drawing the sheet metal discharge electrode 20a, the rigidity is increased, and the electric field strength is increased by the edge of the drawn portion of the drawn portion 77.

FIG. 7 shows a fifth embodiment, in which a throttle portion 78 having a triangular cross section is formed as in the case of FIG. 6, and the rigidity is increased in the same manner as described above by narrowing the sheet metal. 77
The electric field intensity is increased by the edge of the stop portion.

In FIGS. 6 and 7, the discharge is discharged by the tip. The point can be formed by punching a thin plate in manufacturing. Therefore, when a thin plate (for example, a plate thickness of 0.2 mm) is formed as the discharge electrode 20a, a supporting member is required because the rigidity is small, but in order to eliminate it, the rigidity can be increased by drawing.

FIG. 8 shows a sixth embodiment in which a separate L-shaped member 79 is spot-welded to the discharge electrode 20a.

FIG. 9 shows a cut-and-raised piece 80 formed from the discharge electrode 20a.

As described above, in each of the embodiments, the rigidity can be increased by connecting the support plate 71 of the molded product and the discharge electrode 20a, and the safety cover can also be used for insertion of a wire or the like from the front of the grill. it can. When the rigidity is increased by drawing or the like, the support plate 71 can be omitted.

[Effects of the Invention] As described above, the present invention has a suction portion on the front surface, a plurality of flat electrodes formed on the front surface of the dielectric filter, and a plurality of counter electrodes perpendicular to the filter are arranged at intervals. A discharge electrode that is flat and parallel to the filter is disposed between the counter electrodes of the discharge electrodes, and one of the discharge electrode and the counter electrode has a discharge needle portion protruding toward the other. It discharges and causes polarization throughout the filter, so that the filter can be used effectively.The filter can be used effectively, the service life can be extended, and the filter can be easily polarized. And an effect that can be uniformly purified.

[Brief description of the drawings]

1 (a) and 1 (b) are perspective views and cross-sectional views of an embodiment of the present invention, FIG. 2 is a perspective view of a discharge electrode portion of the embodiment, and FIGS. 3 (a) and (b) are perspective views of the embodiment. And a sectional view, FIG. 4 (a)
(B) is a perspective view and a sectional view of the second embodiment, FIG. 5 is a perspective view of the third embodiment, FIG. 6 is a perspective view of the fourth embodiment, and FIG. (B) is a perspective view and a sectional view of the fifth embodiment, FIG. 8 is a perspective view of the sixth embodiment, FIG. 9 is a perspective view of the seventh embodiment, and FIG. FIG. 11 is a sectional view taken along the line AA of FIG. 10, FIG. 11 is a sectional view taken along the line BB of FIG. 10, and FIG. 13 is a sectional view of FIG. -C sectional view, FIG.
FIG. 15 is a plan view of the same, FIG. 16 (a) is a front view of the same filter case, FIG. 16 (b) is a cutaway side view of the same, FIG.
FIG. 16 (c) is a sectional view taken along the line CC of FIG. 16 (a).
16 (d) is a sectional view taken along the line AA of FIG. 16 (a), FIG. 16 (e) is a sectional view taken along the line BB of FIG. 16 (a), and FIG. Principle diagram, FIG. 18 is a cross-sectional view of a conventional example, FIG. 19 is a cross-sectional view of another conventional example, FIG. 20 is a cross-sectional view of still another conventional example, and FIG. . 20a is a discharge electrode, 21a is a counter electrode, 21b is a ground electrode, and 57 is a discharge needle part.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Fujii 1048 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Works, Ltd. (56) References JP-A-1-293148 (JP, A) JP-A-49-32273 (JP, A) JP-A-56-111059 (JP, A) JP-A-48-964 (JP, U) JP-A-49-68778 (JP, U) JP-B 64-1008 (JP, B2) ( 58) Field surveyed (Int. Cl. ⁶ , DB name) B03C 3/41-3/43 F24F 7/00

Claims (1)

(57) [Claims] 1. A front surface of a dielectric filter having a suction portion, a plurality of plate-shaped counter electrodes perpendicular to the filter being spaced from each other, and a plate-shaped space between each pair of counter electrodes. An electrostatic precipitating air purifier comprising a discharge electrode parallel to the filter and a discharge needle protruding from one of the discharge electrode and the counter electrode toward the other.