JPH04135660A - Filter for electrostatic precipitator - Google Patents

Abstract

PURPOSE:To reduce a pressure drop and to increase air quantity by overlaping an electro-conductive meshed body electrostatically charged into polarities to adsorb an electrostatically charged dust onto the air permeable dust eliminating layer. CONSTITUTION:When air is contaminated by smoking and detected by the detecting sensor 15, operation is started automatically and in the case of a heavy contamination, the amount of a suction air is increased to an appropriate level. When air is purified, suction air is decreased according to it and finally stopped automatically. Also, even by the output of a human body detection sensor 14, the mode of operation is switched and controlled as well. This switching control of the operation mode of the air purifier corresponds to the output of the human body detecting sensor 14 and the contamination detecting sensor 14 are operated by the controller. By this means, the pressure drop is reduced and the increase in air quantity is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a filter for an electrostatic precipitator applied to an electrostatic precipitator type air cleaner or the like.

[Conventional technology]

As shown in FIGS. 20 and 21, a conventional filter for an electrostatic precipitator of this type includes a conductive layer 101 made of a nonwoven fabric containing conductive fibers charged with a polarity that adsorbs charged dust. There was a bellows-shaped one overlaid on the breathable dust removal layer 100. 105 is a filter frame.

Another conventional example shown in FIGS. 22 and 23 is a deodorant 10 using granular activated carbon used in air purifiers.
2 is placed in a bellows-shaped space 106 in FIG. In this case, in order to prevent the deodorant 102 from moving, partition strips 103 made of hot melt are laid along the extension direction of the bellows shape on the surface of the conductive layer 101, and
1 is covered with a breathable nonwoven fabric 104.

[Problem to be solved by the invention]

However, this electric precipitator filter has a conductive layer 101.
Since it is a nonwoven fabric containing conductive fibers, there is a drawback that there is a large pressure loss when air is passed through to collect dust, and the air volume is reduced.

Therefore, an object of the present invention is to provide a filter for an electrostatic precipitator that can reduce pressure loss and increase air volume.

[Means to solve the problem]

The filter for an electric precipitator of the present invention has a conductive mesh body superimposed on a nonwoven fabric for collecting dust instead of a nonwoven fabric containing conductive fibers.

[Effect]

According to the configuration of the present invention, air passes through the am remover and collects dust, and the charged dust is adsorbed to the charged mesh body. In this case, the mesh body is sufficiently larger than the dust removal layer and does not affect pressure loss or air flow.

〔Example〕

A first embodiment of the present invention will be described based on FIGS. 1 to 4. In other words, this electrostatic precipitator filter is
A mesh body 1 is superimposed on a breathable dust removal layer 2. In the embodiment, the entire structure is formed into a bellows shape. Further, the mesh body 1 is made of a synthetic resin having conductivity, and the dust removal layer 2 is made of a nonwoven fabric.

In addition, as shown in FIGS. 3 and 4, in this embodiment, a deodorant 3 made of granular activated carbon is filled in the mesh L side of the bellows-shaped space 6, and covered with a breathable nonwoven fabric 5. are doing.

4 is a filter frame that holds a dust collector filter, and the arrow indicates the direction of the wind.

In addition, the discharge part which charges the dust attracted by this filter for dust collectors will be described later.

In the second dust collector filter, when air containing dust is sent in the direction of the arrow, the air passes through the dust removal layer 2 and the dust is collected. Further, the dust charged by the discharge section and passed through the dust removal layer 2 is attracted to the mesh 1 because the mesh 1 is charged with a polarity opposite to that of the dust.

According to this embodiment, since the conductive mesh body 1 is superimposed on the dust removal layer 2, the mesh body 1 has meshes that are sufficiently larger than the dust removal layer 2, so that pressure loss can be reduced compared to the conventional example. Air volume can be increased.

In addition, since the deodorant 3 was filled on the mesh body 1 side, the deodorant 3
Since the movement of the mesh member 1 is prevented by the mesh body 1, there is no need to separately provide conventional partition strips.

An air purifier to which this embodiment is applied is shown in FIGS. 5 to 15. That is, this air purifier includes a wind tunnel casing 18 made of a molded product that constitutes an air passage following an Archimedean spiral, and this wind tunnel sheathing 18 is assembled into an air purifier consisting of a cover 19 and a body 20 as shown in FIG. It is housed in a housing. This wind tunnel casing 18
A motor 11 that rotates the sirocco fan 10 is attached to the central part corresponding to the starting end of the ventilation passage through the anti-vibration rubber 13, and the rotation of the sirocco fan 10 connects the opening formed in the front surface of the cover 19 and the motor of the wind tunnel casing 18. 1
Air is sucked in from the front side through an opening formed on the periphery of the wind tunnel casing 18, which corresponds to the upper left part of FIG.
Air is discharged through an outlet 21 formed in the terminal end of the cover 19 and the cover 19.

A dust collector filter F for an electric precipitator is disposed within the opening of the cover 19, and a discharge section G for charging dust is disposed in front of the filter F. As described above, the dust collector filter F has a bellows structure in which the mesh body 1 and the dust removal layer 2 are overlapped, and has the deodorizer 3. Further, in the discharge section G, as shown in FIG. 15, a counter electrode 23 and a discharge electrode 24 are fixed to an electrode fixing frame 22 at a predetermined distance apart. The discharge electrode 24 is a plate electrode,
A tension force is provided by a coil winding spring 25, and it is connected to a tin-plated copper wire 26. Here, the output of a high voltage generator 27, which will be described later, is applied between the counter electrode 23, the mesh body l, and the discharge electrode 24. The distance! , and the distance 12 between the discharge electrode 24 and the mesh body 1 when the spatial electric field strength is 400 V/m.
If the distance is set to about m or less, stable corona discharge can be generated.

In this electrostatic precipitator λ, a corona discharge is caused between the counter electrode 23 and the discharge electrode 24, and the dust particles N in the air (Fig. 14) are charged by this corona discharge, and the charged dust N is transferred to the mesh. The dust N is collected by the dust collector filter F by attracting the dust N to the dust collector F.

In FIG. 14, the 10 inside the circle indicates positively charged particles.

A pre-filter 7 is provided in front of the discharge section 5 to this electric precipitator.
A grill 8 is attached to the cover 19 to cover the front surface of the pre-filter 7. The wind tunnel casing 18 is equipped with a limit switch S that is turned on when the grill 8 is attached.
, S are provided so that when the grill 8 is removed from the cover 19, the power supply to the air purifier is cut off.

This air purifier is equipped with both a human body detection sensor 14 and a dirt detection sensor 15 as shown in FIG. Starts operation automatically,
The operating motor is also varied depending on the frequency of people's movements or the degree of air pollution. For example, when air pollution is detected by the dirt detection sensor 15 due to smoking, operation is automatically started, and if the air is very dirty, the amount of air suction is adjusted to an appropriate amount depending on the dirt. Raise it like that. Then, when the air becomes clean, the suction amount is lowered accordingly.
Eventually it will stop automatically.

Note that the output of the human body detection sensor 14 is used to control the switching of the driving mode in the same manner. The control section 9 performs switching control of the operating mode of the air purifier according to the outputs of the human body detection sensor I4 and the dirt detection sensor 15.

The control section 9 also includes an operation section 17 that is provided with an automatic/manual changeover switch, an on-off switch for the human body detection sensor 14, a switch for emergency operation, etc.
It also controls the operation of the air purifier according to the operation of the air purifier. moreover,
In addition to the control section 9, this air purifier includes a power supply section 12 that generates power for each section from an AC power source, and a discharge section G of the electric precipitator A.
The high voltage generating section 27 generates a voltage that generates corona discharge. 16.17 is a display section.

Note that in the first embodiment, the bellows-shaped space 6 is filled with the deodorant 3, but the space 6 is not filled with the deodorant 3, and the deodorizer 3 is separately filled with the deodorant 3. may be provided near the dust collector filter.

A second embodiment of the invention is shown in FIGS. 16 to 19. That is, in this electrostatic precipitator filter, one of the vertical lines 1a and the horizontal lines 1b constituting the mesh body 1 of the first embodiment, for example, the horizontal line 1b, is formed to have an elliptical cross section, and the cross section is formed in the direction of the vertical line 1a. It is an ellipse whose long axis is tilted.

According to this embodiment, in the normal installation posture, the horizontal line 1b, which has an elliptical cross section, is horizontal, the vertical line 1a is vertical, and the horizontal line 1b
The first
When the posture is as shown in FIG. 9(b), even if the deodorant 3 moves, it is difficult to create a gap in the air passage, so the deodorizing performance will not deteriorate. In this regard, when the horizontal line 1b is not tilted and the same posture is taken, the deodorant 3
Due to the movement of the deodorant 3, a gap 28 is created between the upper part of the deodorant 3 and the horizontal line 1b, and since air passes through the gap 28 as shown by the arrow, some air does not pass through the deodorant 3, which improves the deodorizing performance. descend.

Note that the elliptical cross section of the horizontal line 1b may be a rectangular cross section.

〔Effect of the invention〕

According to the electrostatic precipitator filter of the present invention, since the conductive mesh is superimposed on the dust removal layer, the mesh has sufficiently larger meshes than the dust removal layer, reducing pressure loss compared to conventional examples. This has the effect of increasing the amount of air.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of the first embodiment of the present invention, Fig. 2 is a partially enlarged view thereof, Fig. 3 is a partially cutaway perspective view of the first embodiment filled with deodorant, and Fig. 4 is a partially cutaway perspective view of the first embodiment of the present invention. 5 is a perspective view of the air purifier, FIG. 6 is a cross-sectional front view thereof, FIG. 7 is a cross-sectional view, FIG. 8 is a side view, and FIG. 9 is a sectional view of the motor part. Figure 1O is a sectional view of the control section, Figure 11 is a cross-sectional view of the dust collector filter, Figure 12 is its front view, and Figure 1
3 is a plan view, FIG. 14 is a diagram explaining the principle, FIG. 15 is a front view of the discharge section, FIG. 16 is a partially cutaway perspective view of the second embodiment, FIG. 17 is a partially enlarged view thereof, and FIG. Fig. 18 is a perspective view of the same, Fig. 19 is a comparative view of the state of use, Fig. 20 is a perspective view of a conventional example partially cut away, Fig. 21 is a partially enlarged view of the conventional example, and Fig. 22 is an example of another conventional example. A partially cutaway perspective view, and FIG. 23 is a partially enlarged view. l...Mesh body, 2...Dust removal layer:-::':':ffl Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure (a) (b) Figure Figure Figure 20 Figure Procedural amendment (voluntary) December 7, 1990 1990 Patent Application No. 256246 2゜Name of invention Electrostatic precipitator filter 3゜Relationship with the case

Claims (1)

[Claims] A filter for electrostatic precipitators in which a conductive mesh body that is electrically charged and which attracts electrically charged dust is layered on a breathable dust removal layer.