JPH07323242A - Dust collecting part of electric precipitator - Google Patents

Abstract

PURPOSE:To provide a dust collecting part of an electric precipitator in which draining after washing has been improved. CONSTITUTION:An impressed electrode plate 10 and a dust collecting electrode plate 29 having energizing side end parts 10A, 20A and opposite side end parts 10B, 20B are alternately laminated. In the energizing side end parts 10A, 20A, energizing support E5, E6 of the same polarity corresponding to them are inserted, and the supports are electrically brought into condition. On the other hand, the opposite side end parts 10B, 20B are opposite to energizing supports E6, E7 that are opposite in polarity in the longitudinal direction of the electrode plates 10, 20 at a distance D away. Otherwise, one of the impressed electrode plate 10 and the dust collecting electrode plate 20 are covered with a covering member made of resin, and the distance P between the adjoining electrode plates 10, 20 is set to >=1.5mm. Alternately the central positions in the width direction of the electrode plates 10, 20 are aligned, and the width of the dust collecting plate 20 is set so that it may be narrower than that of the impressed electrode plate 10 by less than a specific amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting portion of an electrostatic precipitating element, and more particularly, to a space between an applying electrode plate to which a high voltage is applied and a dust collecting electrode plate on the ground side. The present invention relates to a dust collecting portion of an electric dust collecting element that is alternately laminated.

[0002]

2. Description of the Related Art Generally, this type of electrostatic precipitator element is
An ionizer and a dust collector disposed downstream of the ionizer are provided in the path of the air to be cleaned, and the ionizer precharges one polarity (for example, positive polarity). The collected dust in the air is collected by the dust collecting portion.

As such a dust collecting portion, there are an applying electrode plate and a dust collecting electrode plate. The two electrode plates are alternately laminated with an interval allowing air to flow therethrough. It is known that the closer the distance between the applied electrode plate and the dust collecting electrode plate is, the higher the dust collecting efficiency can be obtained. However, when the conductive electrode plates are used as they are, the distance between the electrode plates is 4 mm. The extent is limited, and if the distance between the electrode plates is made narrower to increase the dust collection efficiency, arc discharge will occur. Therefore, one electrode plate (for example, an application electrode plate) is configured by covering a conductive member made of aluminum foil or the like with a resin covering member, and the other electrode plate (for example, a dust collecting electrode plate). Has a conductive member for releasing the charged electric charge, thereby relatively narrowing the gap between the electrode plates,
A high dust collection efficiency is obtained (see, for example, JP-A-3-80953 and JP-A-6-31200).

An energizing strut on the application side is arranged on one end side of each electrode plate, and an energizing strut on the ground side is arranged on the other end side of each electrode plate. The conductive member of the applying electrode plate is electrically connected to the energizing column on the applying side from one end side of the applying electrode plate, and is insulated from the energizing column on the ground side. On the other hand, the conductive member of the dust collecting electrode plate is electrically connected from the other end of the dust collecting electrode plate to the current-carrying pole on the ground side, and is insulated from the current-carrying pole on the application side.

In order to secure the electrical connection between each electrode plate and the corresponding current-carrying column, conventionally, a current-carrying terminal piece is provided on each side to be connected, and the current-carrying terminal piece is curved. The conductive member is pressed against the current-carrying column by the elastic repulsive force (for example, see Japanese Utility Model Publication No. 2-33881). Since such a dust collecting portion is for collecting dust in the air, the dust collected at regular intervals is washed with washing water.

[0006]

However, this conventional device has a problem that the drainability after cleaning is poor. This is because when cleaning the dust collecting part, the above-mentioned electrode plate was provided with the current-carrying terminal pieces that come into contact with the current-carrying struts in a curved state. This is because liquid such as water remains due to surface tension.

The applicant of the present application proposes a structure in which electrode plates having mutually different polarities are alternately laminated to form an electrode plate laminate, and a current is supplied to each electrode plate by a pair of current-carrying columns penetrating the electrode plate laminate. (Japanese Patent Application No. 4-226238)
issue). With this configuration, it is not necessary to provide a curved current-carrying terminal strip at the end of each electrode plate, so it is possible to prevent the liquid from remaining to some extent. However, each energizing strut penetrates both ends of all electrode plates, so
The liquid at the time of cleaning remains in a small gap defined between the end of each electrode plate adjacent to each other in the stacking direction and the current-carrying support.

On the other hand, even if the electrostatic precipitator element after washing is shaken sufficiently for draining, there is also a problem of poor drainage performance with the passage of time in which large water droplets become noticeable. there were. Therefore, the applicant is
As a result of earnest research, it was thought that the problem of poor drainage with time might occur as follows.

That is, even if the element after washing is shaken sufficiently for draining, as shown in FIG. 10, the liquid at the time of washing becomes a large number of fine water droplets W in each electrode plate 10, 20. It remains on the surface. Then, with the passage of time, the large number of water drops W gradually gather and grow. Then, as described above, the distance between the electrode plates 10 and 20 is set relatively narrow in order to obtain high dust collection efficiency, so that one electrode plate (for example, the application electrode plate 10) is used.
The water droplet W that has grown on the electrode plate 1 of both electrodes comes into contact with the water droplet W that has grown on the other electrode plate (for example, the dust collecting electrode plate 20).
The bridge is formed between 0 and 20 to form a so-called bridge (in the figure, W1 represents a water droplet in the bridge state). When the water droplet W1 is in such a bridging state, both ends of the water droplet W1 adhere to the electrode plates 10 and 20 due to surface tension. Therefore, the adhesion force of the water droplet W1 to the electrode plates 10 and 20 is in the bridging state. The water droplet W is stronger than the water droplet W that is not formed, and the water droplet W1 is less likely to drop even if the electrostatic precipitating element is shaken. Further, in the bridging state, the area of the water droplet W1 that comes into contact with the outside air decreases, so it takes time for the water droplet W1 to dry.

On the other hand, when the electrostatic precipitating element is shaken for draining water, the water droplets W remaining on the surfaces of the electrode plates 10 and 20 are moved to the ends of the electrode plates 10 and 20 in the width direction. It remains at the widthwise ends of the electrode plates 10 and 20. (By experiment, it is confirmed that this tendency remarkably appears in the electrode coated with the resin coating member, for example, the applied electrode plate 10. .). Normally, both electrode plates 1
Since 0 and 20 are laminated with the same width and both ends in the width direction are aligned, the distance between the electrode plates 10 and 20 is narrow at both ends in the width direction. Therefore, between the electrode plates 10 and 20, many water droplets W1 are likely to be in the above-mentioned bridging state, especially at the end portion in the width direction where the length is long.

The present invention has been made in view of the above problems and the above consideration, and an object of the present invention is to provide a dust collecting portion of an electric dust collecting element having improved drainability after cleaning.

[0012]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a large number of application electrode plates and dust collectors each having a long plate shape, each having a conductive member made of a conductive material. An electrode laminate including electrode plates, each electrode plate being alternately laminated at intervals with each other, and both ends of the electrode laminate, penetrating in the laminating direction of the electrode plate to form a pair, and In the dust collecting part of the electrostatic precipitator element having different electrodes and electrically conductive columns electrically connected, each electrode plate has a corresponding electrically conductive side that penetrates through corresponding electrically conductive columns of the same polarity. A dust collecting part of an electrostatic precipitating element, characterized in that it includes an end part and a facing side end part facing the opposite-polarity current-carrying pillars at intervals in the longitudinal direction of the electrode plate.

Further, according to a second aspect of the present invention, in the dust collecting portion of the first electric dust collecting element according to the first aspect, the positional deviation of the opposing end portions of the electrode plates provided on the electrode laminate is regulated. It is further equipped with a regulation means to do so. According to a third aspect of the invention, in the dust collecting portion of the second aspect of the electric dust collecting element, the restricting means is a penetrating rod that penetrates each electrode plate in parallel with the current-carrying support.

Further, the invention according to claim 4 includes a large number of application electrode plates and dust collecting electrode plates each formed in the shape of a long plate, each having a conductive member made of a conductive material. The plates are alternately laminated at intervals, and at least one of the applying electrode plate and the dust collecting electrode plate is
In the dust collecting portion of the electrostatic precipitator element in which the conductive member is covered with a resin covering member, the distance between adjacent electrode plates is set to 1.5 mm or more. This is the dust collecting part of the dust element.

Further, the invention according to claim 5 includes a large number of application electrode plates and dust collecting electrode plates each formed in a long plate shape, each having a conductive member made of a conductive material. In the dust collecting portion of the electrostatic precipitating elements, which are alternately stacked at intervals from each other, the widthwise central positions of the applying electrode plate and the dust collecting electrode plate are aligned with each other. A dust collecting part of an electrostatic precipitating element, wherein one width of the applying electrode plate is narrower than a width of the other by a predetermined amount or more.

According to a sixth aspect of the present invention, in the dust collecting portion of the fifth aspect of the present invention, the applying electrode plate is made of a conductive member and a resin covering member that covers the conductive member, and the dust collecting member is provided. The electrode plate is made of a bare metal plate and is characterized in that the width of the dust collecting electrode plate is narrower than the width of the applying electrode plate by a predetermined amount or more.

[0017]

In the invention according to the first aspect of the present invention, since the opposite end portion is spaced from the current-carrying column having the opposite polarity, a desired space can be defined between them.
In addition, since the opposite end portion is retracted in the longitudinal direction with respect to the current-carrying pillar, a wide space is defined around the current-carrying pillar so that only the electrode plates having the same polarity as the current-carrying pillar face each other. Become.

Further, in the invention according to claim 2, the regulating means regulates the positional deviation of the end portion on the opposite side. Further, claim 3
In the described invention, since the penetrating rod that penetrates each electrode plate is used as the restricting means, it is possible to restrict the displacement of the opposite side end without increasing the outer dimension of the electrode laminate.

The invention according to claim 4 has the following operation. That is, the applicant of the present application has experimentally found that when the stacking interval of the electrode plates is set to 1.5 mm or more, it is compared with the case where it is set to less than 1.5 mm.
We have obtained the knowledge that the drainage property is significantly improved. The present invention has been made based on such findings, and according to the present invention, even if the water droplets remaining on the surface of each electrode plate after cleaning are gathered and grown with the passage of time, As a result of the water droplets grown in step 2 being less likely to come into contact with the water droplets grown on the other electrode plate, the grown water droplets are less likely to be laid between the electrode plates, and so-called bridging is less likely to be formed.

The invention according to claim 5 has the following operation. That is, after washing, the electrostatic precipitating element is shaken several times to drain water, so that water droplets tend to remain at both ends in the width direction of each electrode plate. On the other hand, in the present invention, the central positions of the applying electrode plate and the collecting electrode plate are aligned with each other, and the width of one of the collecting electrode plate and the applying electrode plate is made smaller than the width of the other by a predetermined amount or more. Therefore, the interval between the adjacent width direction end portions of the adjacent electrode plates becomes wider than in the conventional case. Therefore, it becomes difficult for the water droplets grown at the widthwise end of one of the electrode plates to come into contact with the water droplets grown at the widthwise end of the other electrode plate, and as a result, the grown water droplets become It becomes difficult to form the above-mentioned bridging at each end in the width direction.

The invention according to claim 6 has the following operation. That is, the adhesive force of water droplets is stronger with resin than with metal. Therefore, after the cleaning, the element is shaken, so that the water droplets remaining on both end portions in the width direction of each electrode plate are covered with the resin covering member rather than the dust collecting electrode plate made of the exposed metal plate. The applied electrode plate grows more easily and tends to form large water droplets. On the other hand, in the present invention, since the width of the dust collecting electrode plate is made smaller than the width of the applying electrode plate where water droplets easily form at the end by a predetermined amount or more, the widthwise end of the applying electrode plate is It becomes difficult for the water droplets grown in 1. to contact the dust collecting electrode plate, and as a result, the grown water droplets are difficult to form the above-mentioned bridge.
Further, in the present invention, since the width of the collecting electrode plate is narrower than the width of the applying electrode plate by a predetermined amount or more, the applying electrode plate is
It is wider than the dust collecting electrode plate and protrudes outward. Therefore, water droplets having a strong tendency to adhere to both ends of the application electrode plate in the width direction are likely to come into contact with the outside air and be easily dried.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing a part of a dust collecting part, which is a first embodiment of the present invention, with a part broken away, and FIG. 2 is an exploded perspective view of a casing part of the dust collecting part. . Referring to these figures, the dust collecting section E
Is an electric dust collecting element together with an ionization part (not shown), and includes a substrate E1, a top plate E2 facing the substrate E1, and a frame member E3 standing between the corners of both plates E1 and E2. (Only two are shown in each of FIGS. 1 and 2)
And a side plate E4 forming a side wall portion from the outside of each frame member E3
(Only one of each is shown in FIGS. 1 and 2).

Between the substrate E1 and the top plate E2, a pair of current-carrying struts E5 made of, for example, metal pipe material such as stainless steel,
E6 is erected, and one (energization pillar E5) is electrically connected to a negative electrode of a high voltage supply source (not shown), and the other (energization pillar E6) is positive electrode of the high voltage supply source. Is electrically connected to the electrode. Figure 1
Referring to, the application electrode plate 10 and the dust collection electrode plate 20 are alternately laminated at intervals between the substrate E1 and the top plate E2, and the electrode laminated body 30 is formed inside. There is.

Both electrode plates 10 and 20 are formed in a long plate shape, and are laminated at intervals in the direction in which the substrate E1 and the top plate E2 face each other (the laminating direction indicated by L in FIG. 1). Although not specifically shown, the application electrode plate 10 is
For example, a conductive resin is printed on a sheet material made of polyethylene terephthalate or the like, and then,
This is a so-called mold type electrode plate in which sheet materials of polyethylene terephthalate are laminated. On the other hand, the dust collecting electrode plate 20
Includes a bare conductive member exposed to the outside and connected to the ground-side electrode. Dust collecting electrode plate 2 of this embodiment
0 is embodied by, for example, stainless steel having a thickness of 50 μm. Spacer protrusions (not shown) are formed on the dust collecting electrode plate 20 by cutting and raising to maintain a distance facing the applying electrode plate 10.

Although it is simplified in FIG. 1, the electrode plates 10 and 20 are actually stacked in, for example, 50 to 90 layers at a narrow interval of about 1.5 mm. As a result, a ventilation path PH through which the air to be cleaned flows is defined between the electrode plates 10 and 20. The energization struts E5 and E6 are paired by penetrating both ends of the electrode laminate 30 in the laminating direction L, and the lower ends are fixed to the substrate E1 and the upper ends are fixed to the top plate E2. There is.

In the above structure, each electrode plate 1
0 and 20 include current-carrying side ends 10A and 20A and opposing-side ends 10B and 20B, respectively, and corresponding current-carrying struts E5 (E6) having the same polarity are connected to current-carrying side ends 10A and 20A.
The conductive member E5 (E6) so that the conductive member is electrically connected to the conductive support member E5 (E6).
20B is made to oppose the electrification support | pillar E6 (E5) of an opposite polarity at intervals D in the longitudinal direction of the said electrode plates 10 and 20. As a result, the electrode plates 10 and 20 are supported in a cantilever manner by the current-carrying columns E5 (E6) having the same polarity.

Further, as shown in FIG. 1, in the dust collecting portion E of this embodiment, each electrode plate 10 supported in a cantilever manner,
A regulation means 40 for regulating the positional deviation of the opposite side end portions 10B, 20B of 20 is provided. In the embodiment of FIG. 1, the restricting means 40 includes a pair of penetrating rods 40A, 4A that penetrate the electrode plates 10, 20 in parallel with the current-carrying struts E5, E6.
It is 0B. Then, like the energization columns E5 and E6, the lower end portion is fixed to the substrate E1 and the upper end portion is fixed to the top plate E2. It is preferable to provide two penetrating rods 40A and 40B as in this embodiment, but the electrode plate 1
Depending on the size of 0 and 20 in the longitudinal direction, it is possible to sufficiently regulate the displacement of the opposite side end portions 10B and 20B with only one. As the penetrating rods 40A and 40B, an alkali resistant metal material (for example, stainless steel) is adopted. The penetrating rods 40A and 40B can contact only the portion of the resin coating member of the applying electrode plate 10 so that the penetrating rods 40A and 40B can contact the applying electrode plate 1.
By penetrating 0, it is electrically insulated from the applied electrode plate 10. The penetrating rods 40A and 40B also penetrate the dust collecting electrode plate 20, but since the dust collecting electrode plate 20 is connected to the electrode on the ground side, its conductive member contacts the penetrating rods 40A and 40B. But there is no problem.

As described above, in the structure of the first embodiment, the opposite side end portions 10B and 20B have the conducting poles E of opposite polarities.
6 and E5 are separated by the distance D, a desired space S can be defined between them. Further, since the opposite side ends 10B, 20B are retracted in the longitudinal direction with respect to the energizing columns E6, E5, the electrode plates having the same polarity as the energizing columns E5, E6 are surrounded by the energizing columns E5, E6. A wide space S1 in which only 10 and 20 face each other can be partitioned. Therefore, according to the first embodiment, each electrode plate 1
Even when the stacking interval of 0 and 20 is set to be narrow, for example, about 1.5 mm, the space between the electrode plates 10 and 20 and the current-carrying columns E5 and E6 is widened, so that water during cleaning hardly remains. Therefore, there is an advantage that the drainage property is improved.

Moreover, since the opposing end portions 10B and 20B face the current-carrying struts E6 and E5 of opposite polarities with a distance D in the longitudinal direction of the electrode plates 10 and 20, the liquid is tentatively provided. Even if it remains, it becomes possible to secure a sufficient insulation distance. Therefore, it is possible to prevent the charge from flowing from the application electrode plate 10 to the dust collecting electrode plate 20 on the ground side through the liquid, and thereby it is possible to exhibit a good dust collecting performance.

Further, each electrode plate 10 in the first embodiment,
Since the opposite end portions 10B and 20B of 20 are regulated in position displacement by the regulation means 40, the respective energization side end portions 10
Regardless of whether the current-carrying struts E5, E6 passing through A, 20A mechanically hold the respective electrode plates 10, 20,
There is an advantage that the mechanical strength of the electrode plate laminate 30 can be sufficiently ensured.

Particularly, in the configuration of the first embodiment, the regulating means 4
0 as a penetrating rod 40 that penetrates both electrode plates 10 and 20.
Since A and 40B are adopted, it is possible to regulate the displacement of the opposite side end portions 10B and 20B without increasing the outer dimension of the electrode laminate 30. Therefore, there is an advantage that it can contribute to downsizing of the product. The above-described first embodiment is merely an example of a preferred specific example of the present invention, and various design changes can be made without departing from the scope of the present invention.

For example, it is possible to employ the configuration shown in FIG. FIG. 3 shows a pair of fixed frames 40C that are fixed to the outer surfaces of the substrate E1 and the top plate E2, extend in the stacking direction L, and regulate the positional displacement of the opposite side ends 10B, 20B of the electrode plates 10, 20. , 40D are adopted. Further, in FIG. 4, two pairs of pins 40E are provided on the outer side surfaces of the substrate E1 and the top plate E2, and each pin 40E is
An example in which a wire 40F is stretched in a substantially N-shape is shown in FIG.

Further, in FIG. 5, a rectangular net 40H having an outer frame 40G is provided, and the net 40H is fixed to predetermined positions of the substrate E1 and the top plate E2, and the opposite side end portions 10B, 2B are provided.
An example is shown in which the displacement of 0B is regulated. The restricting means 40 in the above-described modified examples are provided on both sides of the dust collecting portion E in the ventilation direction.

When the structures shown in FIGS. 3 to 5 are adopted, the size becomes larger than that of the embodiment shown in FIG.
After assembling the dust collecting part E, there is an advantage that the regulating means can be attached. The dust collecting part E of the first embodiment constitutes an electric dust collecting element integrally with an ionizing part (not shown), but the present invention can be applied to the dust collecting part configured separately from the ionizing part. Of course, it is possible.

Alternatively, the polarity of the electrode plate on the dust collecting side may be set opposite to that in the above-described embodiment. Next, a second embodiment of the present invention will be described. FIG. 6 is an explanatory diagram of the applying electrode plate 10 and the dust collecting electrode plate 20 included in the dust collecting portion E that employs the second embodiment of the present invention. Referring to FIG. 6, each electrode plate 1
Nos. 0 and 20 are formed in a long plate shape. Like the first embodiment, the applying electrode plate 10 is a resin mold type electrode plate, and the dust collecting electrode plate 20 is a bare conductive member (metal) such as stainless steel. Parts) are included. The application electrode plate 10 and the dust collection electrode plate 20 are laminated with a space P of 1.5 mm or more.

Although not shown, each electrode plate 10,
20 is mounted and fixed in a casing similar to that of the first embodiment by a known means so as to be electrically connected to the plus or minus electrode and ensure electric insulation between them. Further, in the longitudinal direction of each electrode plate 10, 20 (direction perpendicular to the paper surface), each electrode plate 10, 2
0 is set to have the same length, and the electrode plates 10 and 20 are also set to have the same length in the width direction.

Test 1) Test target In the dust collecting part E similar to the embodiment of FIG. 6, the intervals P were set as follows, and test examples 1 to 3 and comparative examples 1 and 2 were prepared. . Test Example 1: Interval P = 1.5 mm Test Example 2: Interval P = 1.8 mm Test Example 3: Interval P = 2.0 mm Comparative Example 1: Interval P = 1.2 mm Comparative Example 2: Interval P = 1.4 mm 2) Test method After cleaning the dust collecting part E of each of the above examples, shaking each of them two or three times to almost shake off the residual water in the dust collecting part E, and immediately after that, between the pair of electrode plates 10 and 20. In, the number of visible water droplets W1 in a bridging state is counted, and the number is set to 100. And, the number of water drops W1 in the bridging state is
With the passage of time, it was examined what kind of ratio the water droplet W1 was set to 100. That is, the number of water droplets W1 in the bridging state after the lapse of a predetermined time was calculated as an index with the initial state being 100. The lower the index, the better the drainage property over time. 3) Test results The change with time of the number of water droplets W1 in a bridging state is represented by the above index and is shown in FIG. In FIG. 7, each line type indicates the following.

Two-dot chain line: Test example 1 (spacing P = 1.5 mm) Dashed line: Test example 2 (spacing P = 1.8 mm) One-dot chain line: Test example 3 (spacing P = 2.0 mm) Thin line: Comparative example 1 (Interval P = 1.2 mm) Thick line: Comparative Example 2 (Interval P = 1.4 mm) From FIG. 7, the following is considered.

With reference to each of the test examples and each of the comparative examples, the index is lower as the interval P is wider, and when viewed after a lapse of 2 hours, the test examples 1 to 3 are compared with the comparative examples 1 and 2. , The index is extremely low. FIG. 8 is a diagram showing, as an index, the number of water droplets W1 that are in a bridging state after 3 hours have passed in each of the test examples and the comparative examples. Referring to FIG. 8 as well, the indexes of Comparative Example 2, Test Example 1 and Test Example 2 at the time of 3 hours are 300, 100 and 50, respectively. That is, Comparative Example 2 (spacing P = 1.4 mm), in which the spacing is narrowed by 0.1 mm from Test Example 1 (spacing P = 1.5 mm),
The index is 200 for Test Example 1 (pitch P = 1.5 mm)
Is also getting higher. On the other hand, Test Example 1 (interval P =
Test example 2 in which the interval is expanded by 0.3 mm from 1.5 mm)
Is only 50 lower than that of Test Example 1. From this, Test Example 1, that is, the interval P =
It can be known that 1.5 mm is a critical point at which the number of water droplets W1 that becomes the bridging state is significantly reduced.

From the above, the adjacent electrode plates 10, 2
If the interval P between 0s is set to 1.5 mm or more,
It can be seen that over time, the water droplets W at the time of cleaning become less likely to form bridges. Therefore, in the second embodiment in which the interval P between the adjacent electrode plates 10 and 20 is set to 1.5 mm or more, it is difficult to form a bridge, and the drainage property over time after cleaning is improved. It has been done.

Next, in the third embodiment of the present invention shown in FIG. 9, the size of each electrode plate 10, 20 in the width direction is changed.
That is, in the longitudinal direction of the electrode plates 10 and 20 (direction perpendicular to the paper surface), the electrode plates 10 and 20 are set to have the same length, but in the width direction, the dust collecting electrode plate 20 is The width is a predetermined amount (Xm
It is set to be narrower than m). Each electrode plate 1
The center positions of 0 and 20 in the width direction are aligned with each other and stacked alternately. From the above, the dust collecting electrode plate 2
One end in the width direction of 0 is recessed by X / 2 mm or more from that of the applying electrode plate 10, and the other end in the width direction of the dust collecting electrode plate 20 is X more than that of the applying electrode plate 10. It is supposed to be retracted by / 2 mm or more.

The configuration other than the above is the same as that of the second embodiment, but the stacking interval P between the applying electrode plate 10 and the dust collecting electrode plate 20 is not limited to the numerical value of the second embodiment. Next, the operation of the third embodiment will be described. After washing, if the electrostatic precipitator element is shaken several times to drain water,
Many water droplets W remain on both ends of each electrode plate in the width direction, and are likely to be in the bridging state. However, according to the third embodiment, the central positions of the electrode plates 10 and 20 are aligned with each other so that the width of the dust collecting electrode plate 20 is narrower than the width of the applying electrode plate 10 by a predetermined amount (X mm) or more. Therefore, the interval between the adjacent width direction end portions of the adjacent electrode plates 10 and 20 becomes wider. Therefore, it becomes difficult for the water droplet W grown at the widthwise end of one electrode plate to contact the water droplet W grown at the widthwise end of the other electrode plate, and as a result, the grown water droplet becomes It becomes difficult to form the above-mentioned bridging at each end portion in the width direction (when the difficulty of forming the bridging is taken into consideration, the above-mentioned predetermined amount is X mm or more = 2 mm or more). Therefore, according to the third embodiment, the drainage property over time after cleaning is improved.

Further, since the adhesive force of water droplets is stronger in the resin than in the metal, the water droplets W remaining on both end portions in the width direction of each electrode plate due to the element being shaken after cleaning are exposed to the exposed metal plate. The applied electrode plate 10 covered with the resin-made covering member is more likely to grow than the dust collection electrode plate 20 made of, and a large water droplet W tends to be formed. On the other hand, in the third embodiment, the width of the dust collecting electrode plate 20 is set to be a predetermined amount (X mm) or more narrower than the width of the applying electrode plate 10 in which large water droplets W are likely to be formed at the ends. Therefore, the application electrode plate 10
The water droplet W grown at the end portion in the width direction becomes difficult to contact the dust collecting electrode plate 20, and as a result, the grown water droplet W does not easily form the above-mentioned bridge. Further, in the third embodiment, the width of the dust collecting electrode plate 20 is narrower than the width of the applying electrode plate 10 by a predetermined amount (X mm) or more, so that the applying electrode plate 10 is smaller than the dust collecting electrode plate 20. , Wide and sticks out. Therefore, the water droplets W, which have a strong tendency to adhere to both ends of the application electrode plate 10 in the width direction, easily come into contact with the outside air and easily dry. From the above, according to the third embodiment,
It is possible to surely achieve improvement in drainage property with time after washing.

The above-described second and third embodiments are merely examples of preferred embodiments of the present invention, and various design changes can be made without departing from the spirit of the present invention. For example, when the configurations of the second embodiment and the third embodiment are combined, the above-mentioned actions are combined to improve the drainage property with time after cleaning more reliably.

Also, in any of the second and third embodiments, an electrode laminated body constituted by laminating an applying electrode plate and a dust collecting electrode plate, which are formed in a long strip-like long plate shape, at intervals is provided. Alternatively, it may be implemented in a dust collecting portion formed by spirally winding.

[0046]

As described above, according to the first aspect of the present invention.
In the described invention, a desired space can be defined between the current-carrying strut and the opposite side end portion that faces it, and further,
Since a wide space is defined around the current-carrying column, where only electrode plates of the same polarity as the current-carrying column face each other. Are less likely to remain, and there is an advantage that drainability is improved.

In addition, since the opposite end faces the current-carrying pole having the opposite polarity with a distance in the longitudinal direction of the electrode plate, a sufficient insulation is obtained even if the liquid remains. It becomes possible to secure a distance. Therefore, it is possible to prevent the charge from flowing from the application electrode plate to the dust collecting electrode plate on the ground side through the liquid, and thereby it is possible to exhibit good dust collecting performance.

Further, in the invention according to the second aspect, since the regulation means regulates the positional deviation of the end portion on the opposite side, there is an advantage that the mechanical strength of the electrode plate laminate can be sufficiently ensured. Further, in the invention according to the third aspect, it is possible to regulate the positional deviation of the opposite side end portion without increasing the outer dimension of the electrode laminated body, which is advantageous in that it can contribute to the miniaturization of the product. .

Further, according to the invention of claim 4, when the stacking interval of the adjacent electrode plates is set to be 1.5 mm or more, the drainage is compared with the case where it is set to be less than 1.5 mm. It was made based on the experimental result that the sex is significantly improved. According to this, even if the water drops remaining on the surface of each electrode plate after cleaning gather and grow together over time, the water drops grown on one electrode plate will contact the water drops grown on the other electrode plate. As a result, it becomes difficult for the grown water droplets to be bridged between the electrode plates, and it is difficult to form a so-called bridge. Therefore,
The drainage property with time after washing is improved.

The invention according to claim 5 has the following effects. That is, after washing, the electrostatic precipitating element is shaken several times to drain water, so that water droplets remain on both end portions in the width direction of each electrode plate. On the other hand, in the present invention, the central positions of the applying electrode plate and the collecting electrode plate are aligned with each other, and the width of one of the collecting electrode plate and the applying electrode plate is made smaller than the width of the other by a predetermined amount or more. Therefore, the distance between the adjacent width direction end portions of the adjacent electrode plates becomes wider than in the conventional case. Therefore, it becomes difficult for the water droplets grown at the widthwise end of one of the electrode plates to come into contact with the water droplets grown at the widthwise end of the other electrode plate, and as a result, the grown water droplets become It becomes difficult to form the above-mentioned bridging at each end in the width direction. Therefore, the drainage property with time after washing is improved.

The invention according to claim 6 has the following effects. That is, the adhesive force of water droplets is stronger with resin than with metal. Therefore, after the cleaning, the element is shaken, so that the water droplets remaining on both end portions in the width direction of each electrode plate are covered with the resin covering member rather than the dust collecting electrode plate made of the exposed metal plate. The applied electrode plate grows more easily and tends to form large water droplets. On the other hand, in the present invention, the width of the dust collecting electrode plate is made smaller than the width of the applying electrode plate by a predetermined amount or more than the width of the applying electrode plate where large water droplets are likely to be formed at the end. It becomes difficult for the water droplets grown in the portion to contact the dust collecting electrode plate, and as a result, the grown water droplets are less likely to form the above-mentioned bridge. Further, in the present invention, since the width of the dust collecting electrode plate is narrower than the width of the applying electrode plate by a predetermined amount or more, the applying electrode plate is wider than the dust collecting electrode plate and protrudes outward. There is.
Therefore, water droplets having a strong tendency to adhere to both ends of the application electrode plate in the width direction are likely to come into contact with the outside air and be easily dried.
From the above, according to the present invention, it is possible to reliably achieve the improvement of drainage property over time after cleaning.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a part of a dust collecting part, which is cut away, adopting a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a casing portion of the dust collecting portion.

FIG. 3 is a schematic perspective view showing a part of a dust collecting section, which is cut away, adopting a modification of the first embodiment of the present invention.

FIG. 4 is a schematic perspective view showing a part of a dust collecting portion, which is cut away, adopting another modification of the first embodiment of the present invention.

FIG. 5 is a schematic perspective view showing a part of a dust collecting part, which is cut away, adopting still another modification of the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of an applying electrode plate and a dust collecting electrode plate included in a dust collecting unit adopting a second embodiment of the present invention.

FIG. 7 is a diagram showing the number of water droplets in a bridging state as an index with respect to a predetermined interval between adjacent electrode plates, and showing a change with time of the index.

FIG. 8 is a diagram showing, as an index, the number of water droplets in a bridging state at a predetermined interval between adjacent electrode plates after a lapse of 3 hours after cleaning.

FIG. 9 is a cross-sectional view showing a relationship in the width direction between the applying electrode plate and the dust collecting electrode plate included in the dust collecting unit adopting the third embodiment of the present invention.

FIG. 10 is an explanatory diagram of water droplets in a bridging state in a conventional electrode plate.

[Explanation of symbols]

 E Dust collecting part E5 Energizing strut E6 Energizing strut P Interval 10 Applying electrode plate 20 Dust collecting electrode plate 30 Electrode plate laminate 40 Regulation means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hirokazu Ishikawa, 1-1 Nishiichitsuya, Settsu City, Osaka Prefecture Daikin Industries, Ltd. Yodogawa Manufacturing Co., Ltd. (72) Katsumi Iguchi, 1-1 Nishiichitsuya, Settsu City, Osaka Daikin Industries, Ltd. Yodogawa Manufacturing Co., Ltd.

Claims (6)

[Claims] 1. A plurality of applying electrode plates (10) and dust collecting electrode plates (20) each having a long plate shape and each having a conductive member made of a conductive material, and each electrode plate (10, 20) An electrode laminated body (30) configured by alternately laminating the electrode plate (10, 2) with the electrode plate (10, 2).
0) in the stacking direction (L), forming a pair, and a current collecting column (E5, E6) electrically connected to electrodes different from each other, in the dust collecting portion of the electrostatic dust collecting element, each electrode plate (10, 20) is a conduction pole (E6, E5) of opposite polarity to the conduction side end portion (10A, 20A) which is electrically connected through the corresponding conduction poles (E5, E6) of the same polarity. ) To the electrode plate (10, 20) in the longitudinal direction, the end portion (1) facing each other at an interval (D).
0B, 20B), and the dust collecting part of the electrostatic precipitating element. 2. The dust collecting part of the electrostatic precipitating element according to claim 1, wherein the electrode laminate is provided on the electrode laminate (30) and each electrode plate (1) is provided.
0, 20) is further provided with a restricting means (40) for restricting the displacement of the opposite side end portions (10B, 20B). 3. The dust collecting portion of the electric dust collecting element according to claim 2, wherein the regulating means (40) penetrates through the electrode plates (10, 20) in parallel with the current-carrying columns (E5, E6). Stick (40
A, 40B). 4. A plurality of applying electrode plates (10) and dust collecting electrode plates (20) each formed in a long plate shape, each having a conductive member made of a conductive material, the applying electrode plate (10) and the dust collecting member. The electrode plates (20) are alternately laminated at intervals (P), and at least one of the applying electrode plate (10) and the dust collecting electrode plate (20) has a conductive member made of resin as a covering member. In the dust collecting portion of the electrostatic precipitator element having the configuration covered by, the interval (P) between the adjacent electrode plates (10, 20) is
The dust collecting part of the electrostatic precipitator element, which is set to 1.5 mm or more. 5. An application electrode plate (10) and a dust collector, comprising a plurality of application electrode plates (10) and dust collection electrode plates (20) each formed in a long plate shape and each having a conductive member made of a conductive material. The electrode plates (20) are disposed in the dust collecting portion of the electrostatic precipitating elements, which are alternately stacked at intervals (P), and are located at the center positions in the width direction of the applying electrode plate (10) and the dust collecting electrode plate (20). The dust collecting electrode plate (20) and the applying electrode plate (10) have a width that is narrower than a width of the other by a predetermined amount or more. Dust part. 6. The dust collecting part of the electrostatic precipitating element according to claim 5, wherein the applying electrode plate (10) comprises a conductive member and a resin covering member covering the conductive member, and the dust collecting electrode plate (20). Is made of a bare metal plate, and the width of the dust collecting electrode plate (20) is made smaller than the width of the applying electrode plate (10) by a predetermined amount or more.