JPH0330847A - Electric dust collection type air cleaner - Google Patents

Abstract

PURPOSE:To enable a life of filter to be made longer by arranging electrode plates in front of a filter with certain spacings and by setting flat plate counter electrodes between those electrode plates. CONSTITUTION:Discharge electrodes 20a are fixed to a supporting frame 19 by supporting plates 71 and counter electrodes 21a are fitted into slits 72 of the supporting frame 19. Holes 73 are bored through the discharge electrodes 20a, projections 74 are arranged on the supporting plates 71 to be inserted into the holes 73, and the discharge electrode 20a are connected to the supporting plates 71 by inserting the projections 74 into the holes 73 and hot- caulking them. Corona discharges are generated from discharge needles 57 of the discharge electrodes 20a by applying a high voltage with a power source 65. Electric fields are formed between the counter electrodes 21a and a dust- removing filter 14 by the corona discharges, the dust-removing filter is polarized as a result and the dust is captured by Coulomb force. It is possible to clean air homogeneously by this apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an electrostatic precipitator air cleaner having a discharge electrode section.

[Prior Art] Fig. 17 shows a diagram of the principle of electrostatic precipitation, in which a discharge electrode 62 is disposed between a counter electrode 61, and a ground electrode 64 provided with a filter 63 made of polypropylene fiber and the counter electrode 61 are placed at the same potential. A power source 65 is connected between these and the discharge electrode 62. Dust is removed by corona discharge between the discharge electrode 62 and the counter electrode 61.
charged to. Since polypropylene is polarized, dust on the e side and Φ of the polypropylene is attracted and collected by Coulomb force. Note that the arrows in the figure indicate the flow of air.

FIG. 18 shows a discharge electrode section of a conventional electrostatic precipitator air purifier, with a counter electrode 61 disposed between linear discharge electrodes 62.
is formed in a substantially U-shape, so that the counter electrode 61 and the ground electrode 6
4 (X part in the figure), and therefore the polypropylene fibers of the dust removal filter 63 in the lower part of the counter electrode 61 are not polarized (Y part in the figure), and the collection efficiency in this part is low. , the entire filter 63 is not used effectively. Incidentally, since the section 7 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.

[Problem to be Solved by the Invention] However, as shown in FIG. 19, if the counter electrode 61 is made into a flat plate shape instead of a U-shape, there is no problem because the polarization of the filter 63 is uniform. .

However, the number of linear discharge electrodes 62 increases, and the discharge current increases. And the amount of ozone generated increases.

A large amount of ozone is harmful to the human body, so it must be reduced (less than 0.1 PPM according to environmental standards). Therefore, the configuration shown in Figure 19 cannot be used;
The configuration was as shown in Figures 8 and 20. Furthermore, the second
In FIG. 0, as shown in FIG. 21, a discharge needle 66 is provided at the tip of the discharge electrode 62. Furthermore, if the discharge electrode 62 is made linear, it becomes thinner, but the discharge fi! There is a problem that 62 is cut off. Further, when the discharge needle 66 of the discharge electrode 62 is oriented vertically, there is a problem that the discharge needle 66 becomes thicker.

The present invention has been provided in view of the above-mentioned points, and provides an electrostatic precipitator air purifier that uses a filter effectively and extends its life, and is designed to be thinner. be.

[Means for Solving the Problems] The present invention has a suction section on the front surface, and one wide flat electrode plate is arranged at intervals on the front surface of a dielectric filter, and there is a suction section between the one electrode plate. The other plate-like electrode body is disposed, and the discharge needle portion is provided on one electrode plate or the other electrode body toward the corresponding electrode body or electrode plate side.

[Function] With the above configuration, the discharge needle portion generates a discharge to cause polarization throughout the filter, thereby making effective use of the filter.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. First, I will explain the structure of the air purifier.

Figure 10 shows a front view, and Figure 11 shows A-A in Figure 10.
12 is a sectional view taken along line B-B in FIG.
3 shows a sectional view taken along the line C--C in FIG. 10, respectively. 1st
In FIG. 1, a boss 2 is provided approximately at the center of the main body 1 so as to protrude toward the rear side, and a flat plate-shaped fixing fitting 3 is fixed to the boss 2 with screws 4. An induction motor 6 is fixed to this fixture 3 via a vibration isolating rubber 5. A sirocco fan 8 is fixed to the output shaft 7 of this motor 6 with 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, and air is sucked in and discharged by rotation of the fan 8.

On the front side of the main body 1, there is a grill 12 and a deodorizing filter 13.
, a dust removal filter 14, and a pre-filter 15 are provided. The deodorizing filter 13 and the dust removing filter 14 are set between 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 part is disposed between the pre-filter 15 and the filter case 17, and a positive electrode 20 and a negative electrode 21 are arranged and fixed at a certain interval by a holding frame 19 of the electrode part.

In FIG. 10 [U and FIG. 13, a moving object detection sensor 22 is disposed at the lower right side of the front surface of the main body 1, and above it there is a reset push button 23 for detecting a filter and a moving object detection sensor 22. A switch 24 for turning on and off the detection sensor 22 is provided. This switch 2
By learning 4, the moving object detection sensor 22
can be used in conjunction with a gas sensor, or can be turned off and used alone as a gas sensor. Each time the manual switch 25 is pressed, the operation mode can be changed.Furthermore, a remote control receiving unit 26 is provided, which receives infrared carrier waves from the remote control transmitter and uses the microcomputer to select each operation mode. It is now possible to switch to mode.

Automatic operation display lamp 27 shown in FIGS. 10 and 13,
The timer operation status display lamp 28, the filter replacement sign lamp 29, and the turbo operation display lamp 30 are each equipped with an LED to emit surface light using a light emitting diode.
It has a case 31 and a diffusion sheet 32. A smoked acrylic plate 33 is disposed on the front surface of the device in order to display the operation in a pictographic manner. This smoked acrylic plate 33 also serves as a light receiving filter for the remote control receiver.

A tact switch is provided behind the operation stop switch 34 shown in FIG. 10, and is connected to a microcomputer. When the operation stop switch 34 is pressed once, only the lamp for displaying the degree of dirt in the room lights up, and all other functions are turned off.

If you press it one more time, the dirt level display will also turn off, and if you press it one more time, only the display will turn on.

Each time the above manual switch 25 is pressed, the standard automatic
Powerful automatic, silent automatic, driving mode T, II,
1. Switches between ff, V, turbo operation, and off. The automatic operation display lamp 27 lights up only when the above three automatic operations are performed. The timer operation status indicator lamp 28 lights up only when the air purifier is running on a timer, and the filter replacement sign lamp 29 lights up after a certain period of time has passed since the filters 13 and 14 were inserted.

The lamps 35 to 39, which are made up of light emitting diodes and which display the mode selection in manual mode and the status of each operation mode, are as follows.

■When in driving mode■, lamp 35 lights up■driving mode■
When , lamp 36 lights up ■ When in driving mode ■, lamp 3
7 is lit ■When the driving mode is ■, lamps 3 and 8 are lit ■When the driving mode is V, the lamp 39 is lit ■When the driving mode is turbo, the lamp 30 is lit In addition, the above lamps 35 to 39
There are six lamps 41 on the sides that display the level of dirt in the room.
~46 are arranged. These lamps 41 to 46 are
They light up sequentially as the degree of contamination increases from when the degree of contamination is low, and when the degree of contamination is at its maximum, the six lamps 41~
46 are all lit to display the display.

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. A sensor cap 49 and a gap seal 50 are provided around the gas sensor 47, and a gas sensor grid portion 51 is provided on a part of the front surface of the grill 12 as shown in FIG. Air can easily enter a part of the gas sensor.

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

A tact switch is disposed below the filter life sign reset push button 23, and 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 top surface of the main body 1, and a
As shown in the figure, a high voltage generation unit 5 is mounted on the upper part of the main body 1.
A DC voltage is input and applied to this high voltage generation unit 55 from a printed circuit board 52, and the output voltage is +6500v to 7000v applied to the positive electrode 20 of the electrode plate, and the negative side is applied to the positive electrode 20 of the electrode plate. It is connected to the negative electrode 21 of the plate.

Further, as shown in FIG. 16, the filter case 16,
The back side of the dust removal filter 14 in 17 is coated with a conductive adhesive over the entire surface using a binder. An electrode plate 56 is attached to the filter frame so as to be in contact with the surface of the conductive adhesive. This electrode plate 56 is connected to the negative side of the high voltage generation unit 55 via an electrode plate located in the filter housing portion of the wind tunnel gauging 11.

Next, the discharge electrode portion, which is the gist of the present invention, will be explained. FIG. 1(a) 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 cross-sectional view of the discharge electrode section. The discharge electrode 20a is formed into a flat plate shape, and a large number of discharge needles 57 are arranged in a row on the side edge. The counter electrode 21a is also formed into a flat plate shape, and the counter electrode 21a is arranged in the vertical direction between the electrodes 20a arranged at intervals in the horizontal direction. The discharge electrode 20a is formed wide. Discharge electrode 20a and counter electrode 2
Connection terminals 58 and 59 are provided at the ends of 1a, respectively.

As shown in FIG. 1(b), the ground electrode 2 is formed into a wave shape.
A wave-side dust removal filter 14 is arranged above 1b (on the front side), the ground electrode 21b and the counter electrode 21a are connected to the negative side of the power source 65, and the discharge electrode 20a is connected to the positive side of the power source 65. .

FIG. 2 shows a perspective view of the entire discharge electrode section, and shows the discharge electrode 20.
a is supported and fixed to the holding frame 19 by a support plate 71, and the counter electrode 21a is fitted into a slit 72 of the support frame 19. The discharge electrode 20a is provided with a hole 73 as shown in FIG. It is inserted into the hole 73 and connected by thermal caulking.

Note that the discharge needle portion 57 may be provided on the counter electrode 21a side.

As shown in FIG. 1(b), the discharge needle portion 5 of the discharge electrode 20a
By applying a high voltage of 6500 V from the power supply 65 from 7 to 7, a corona discharge is generated. With this configuration, an electric field is generated between the counter electrode 21a and the dust removal filter 14, the polypropylene fibers of the dust removal filter 14 are polarized, and the dust on the e side of the polypropylene and the dust on the ■ are collected by Crohn's force. Ru.

FIG. 4 shows a second embodiment, in which a long hole 75 is bored in the longitudinal direction in the center of the discharge electrode 20a. This is because if the discharge electrode 20a is a flat plate, the electric field strength is low, so in order to increase the electric field strength, a long hole 75 is bored and the edge of the end face of the long hole 75 increases the electric field strength. be. This is because by providing the apex, the electric field strength at that portion increases because the apex has a high charge density.

5 shows a third embodiment, in which a large number of holes 76, which are not long holes, are bored. FIG. 6 shows a fourth embodiment in which a large number of holes 76 are formed to form a large number of edge portions.
A drawn portion 77 is formed by drawing the discharge electrode 20a, and this drawn portion 77 has a square hole shape. By drawing the sheet metal discharge electrode 20a, its rigidity is increased, and the edge of the drawn portion of the drawing portion 77 increases the electric field strength.

FIG. 7 shows a fifth embodiment, in which a constricted part 78 having a triangular cross section is formed as in the case of FIG. 7
The electric field strength is increased by the edge of the constriction part 7.

In Figures 6 and 7, a discharge is discharged by the apex. This peak can be formed by punching out a thin plate during production. Therefore, a thin plate (for example, plate thickness 0.2+u+
) as the discharge electrode 20a, the rigidity is low and a support member is required, but in order to eliminate this, 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 by cutting and raising the discharge electrode 20a.

In this way, in each embodiment, by combining the support plate 71 of the molded product and the discharge electrode 20a, it is possible to increase the rigidity and also serve as a safety cover for inserting a wire etc. from the front of the grill. can. Furthermore, if the rigidity is increased by drawing or the like, the support plate 71 can be made unnecessary.

[Effects of the Invention] As described above, the present invention has a suction portion on the front surface, and one wide and flat electrode plate is arranged at intervals on the front surface of the dielectric filter, and there is a gap between the one electrode plate. The other plate-like electrode body is arranged, and the discharge needle part is provided on one electrode plate or the other electrode body facing the corresponding electrode body or electrode plate, so that discharge can be caused by the discharge needle part. This makes it possible to use the filter effectively by causing polarization throughout the entire filter, which makes it possible to use the filter effectively and extend its life. This provides the effect of uniform purification.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are a perspective view and a sectional view of an embodiment of the present invention, FIG. 2 is a perspective view of the same discharge electrode section, and FIG.
)(b) is a perspective view and sectional view of the same as above, and FIGS. 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 cross-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. 10 is an air purifier. A front view of the vessel, Fig. 11 is a cross-sectional view taken along line A-A in Fig. 10 of the same above, Fig. 12 is a cross-sectional view taken along line B-B of Fig. 10 of same as above, and Fig. 13 is a cross-sectional view taken along line C-C of Fig. 10 of same as above. 14 is a side view of the same as above, FIG. 15 is a plan view of the same as above, FIG. 16(a) is a front view of the filter case of same as above, FIG. 16(b) is a broken side view of same as above, Figure 16(e) is a cross-sectional view taken along the line CC in Figure 16(a), and Figure 16(d) is the same as Figure 16(a).
16(e) is the AA cross-sectional view of FIG. 16(a).
), Figure 17 is a diagram of the principle of electrostatic precipitation, and Figure 1
FIG. 8 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. 21 is a perspective view of essential parts of the same. The other electrode, 57, is a discharge needle.

Claims (1)

[Claims] (1) It has a suction part on the front side, and one wide flat electrode plate is arranged at intervals on the front side of the dielectric filter, and the other flat electrode body is arranged between one electrode plate. An electrostatic precipitator air cleaner characterized in that one electrode plate or the other electrode body is provided with a discharge needle portion facing the corresponding electrode body or electrode plate side.