JPH0889841A - Air cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent dielectric breakdown between electrodes of an electrostatic air purifier. [Arrangement] -In the vicinity of the gas inlet 51 and the gas outlet 52 in the main body 50, -electrode support plates 53a and 53b are provided. -The electrode support plate includes a bottom wall 50c and an upper wall 50.
Insulating support members 54a, 54b provided near the four corners of d
Supported by. -On the electrode support plate, -threaded rods 55 that form electrodes are arranged in parallel vertically and in the front and rear at regular intervals and are fixed by nuts. A plurality of electrode plates 57 are erected in parallel between the threaded rods. Then, in the vicinity of the support member, the tip of a hose extending from the air supply pumps 61 and 62 provided outside the main body is arranged. Even if the water in the gas supplied into the main body condenses on the support member, air is blown from the tip of the hose, so the insulation of the support member is not impaired, and the operation of removing fine particles in the gas by ionization is hindered. Absent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner, and more particularly, to an air cleaner suitable for cleaning air containing smoke-like particles.

[0002]

2. Description of the Related Art Heretofore, as an air cleaner of this type, for example, a main body having a gas inlet on one side of a rectangular parallelepiped container and a gas outlet on the side opposite to the same side, and both end portions inside the main body A plurality of first members which are arranged in parallel with each other in the direction of both side surfaces and which are supported on the inner wall surface of the main body in a conductive state.
An electrode member, an electrode support member that is disposed substantially parallel to both side surfaces of the main body at positions near both side surfaces of the main body, and is supported in an insulated state from the main body by an insulating support member attached to an inner wall surface; A plurality of second electrode members disposed between the electrode members, both ends of which are fixed to the electrode supporting member, and a power supply device for supplying a high voltage between the first electrode member and the second electrode member. Was known. In this air purifier, the gas flowing from the gas inlet is ionized between the first electrode member and the second electrode member to which a high voltage is applied, and any of the electrodes is separated by the time the ionized particles reach the gas outlet. It has been known to be very suitable for cleaning the air containing smoke-like fine particles because it is efficiently sucked and adsorbed by the.

[0003]

However, in the above air purifier, the water contained in the gas supplied to the main body during operation is condensed and adhered to various places in the container, and in particular, the insulating support below the container is used. It was easy to collect in the material. Therefore, there is a problem that the function of the air cleaner is lost due to the dielectric breakdown between the first electrode member and the second electrode member to which a high voltage is applied in this portion. Further, as the insulating support member, a ceramic insulator is usually used, but there is a problem that the insulator is damaged when dielectric breakdown occurs. The present invention is intended to solve the above problems, and provides an air purifier that can obtain a stable air purifying function that does not cause dielectric breakdown between both electrode members due to condensation of water in a supply gas. To aim.

[0004]

In order to achieve the above object, the structural feature of the invention according to claim 1 is that a gas inlet is provided on one side surface of a rectangular parallelepiped container and a gas outlet is provided on the other side surface. A main body, a plurality of first electrode members arranged in parallel with each other in the main body and supported in an electrically conductive state on the inner wall surface of the main body, and a plurality of second electrodes arranged corresponding to the first electrode member. Member, an insulating electrode support member that supports the second electrode member on the inner wall surface of the main body in an insulated state, a power supply device that supplies a high voltage between the first electrode member and the second electrode member, and a wall surface of the main body. And an air supply pipe whose one end is disposed near the inner wall surface of the insulating electrode support member toward the insulating electrode support member, and an air supply device which supplies air from the other end of the air supply pipe into the air supply pipe. It has been established.

Further, the structural feature of the invention according to claim 2 is that the gas inlet is provided on one side surface of the rectangular parallelepiped container, and the gas outlet is provided on a side surface opposite to the one side surface. Both ends are arranged parallel to each other, facing both sides,
A plurality of first electrode members supported in an electrically conductive state on the inner wall surface of the main body, and an insulative support member arranged substantially parallel to the both side surfaces at positions near both side surfaces of the main body and attached to the inner wall surface of the main body; An electrode supporting member supported in an insulated state;
A plurality of second electrode members which are disposed between the electrode members and whose both ends are fixed to the electrode supporting member, a power supply device which supplies a high voltage between the first electrode member and the second electrode member, and a wall surface of the main body. An air supply pipe that penetrates through and has one end disposed near the insulating support member toward the insulating support member, and an air supply device that supplies air from the other end of the air supply pipe into the air supply pipe are provided. There is something.

[0006] Further, the structural feature of the invention according to claim 3 is that in the air cleaner according to claim 1 or 2, the first electrode member or the second electrode member is a rod-shaped body with a groove. There is that.

Further, the constitutional feature of the invention according to claim 4 is that in the air cleaner according to claim 1 or 2, the insulating support member is formed of an ultra-high molecular weight polyethylene material. It is in.

[0008]

By configuring the invention according to claim 1 as described above, the moisture contained in the gas supplied into the main body during the operation of the air purifier supports the insulating electrode below the container. When the air starts to accumulate in the member, the air supplied into the air supply pipe by the air supply device is blown onto the insulating electrode supporting member. For this reason, the water that is about to accumulate on the insulating electrode supporting member is removed by the blown air, so that the water does not accumulate while being attached to the insulating electrode supporting member. As a result, the dielectric strength of the insulative electrode support member is not impaired, and insulation breakdown occurs between the first electrode member and the second electrode member to which a high voltage is applied, resulting in loss of the air cleaner function. Can be prevented in advance.

Further, since the invention according to claim 2 is configured as described above, as with the effect of the invention according to claim 1, moisture does not accumulate while being attached to the insulating support member. The dielectric strength of the insulating support member is not impaired, and the function of the air cleaner is not lost.

According to the invention of claim 3 as described above, the gas is ionized between the first electrode member and the second electrode member smoothly by the protruding portion of the rod-shaped member, and The cleaning function is enhanced.

Further, by constructing the invention according to claim 4 as described above, since the ultra high molecular weight polyethylene material has extremely high strength against discharge, even if the insulation is accidentally broken by the insulating support member, the insulation The support member is not damaged. As a result, it is convenient because it is not necessary to replace the insulating support member when the air purifier is restarted after taking measures against the insulation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows an air purifier according to the embodiment in a perspective view. This air purifier is provided with a centrifugal air purifying section M1 and an electrostatic air purifying section M2 provided on the right side of the centrifugal air purifying section M1, which is a main part of the present embodiment. The centrifugal air cleaning section M1 includes a main body 10 made of stainless steel and an electric motor 40 attached to the upper surface thereof. As shown in FIG. 2, the main body 10 has a lower part 11 and an upper part 15 joined together. The lower side portion 11 is a cylindrical container having an open upper surface, and is provided with a flange portion 12 directed to the outside at the upper end peripheral portion. A cylindrical air inlet 13 is attached to a side surface of the lower side portion 11, and a bottom surface 14 thereof is provided with an inclined plate 14a for collecting oil and the like separated from the air in one place. And its lower end is connected to a drain device (not shown).

As shown in FIG. 2, the upper portion 15 has a cylindrical shape having a diameter larger than that of the lower portion 11. The upper portion 15 is placed on the lower portion 11, and the bottom plate 15 a is bolted to the flange portion 12 of the lower portion 11. It is fixed by B1. The upper part 15 is the bottom plate 15.
An opening 15a1 is provided at the center of a. In the peripheral portion of the opening 15a1 on the lower surface of the bottom plate 15a, approximately 5
A slanted portion 15a2 that is slanted at .degree. Is provided. The upper portion 15 has an opening 15b1 at the center of the upper plate 15b, and an annular support plate 15c is provided on the upper plate 15b by a bolt B2.
It is fixed by. On the left side of the upper side portion 15, FIG.
As shown in, the exhaust port 16 protruding in the tangential direction is provided and is connected to the gas inlet of the electrostatic air cleaning unit M2 described later.

A rotary impeller 20 is provided inside the upper portion 15. The rotary impeller 20 is provided with an upper disc 21 and a lower disc 22 made of stainless steel, and a central shaft 23 connecting them, and a plurality of plate-shaped vanes 24 radially around the central shaft 23. It is fixedly provided on the plate 21 and the lower disc 22. An air inflow hole 22a is provided at the center of the lower disk 22, and an annular mounting portion 22b is provided around the lower side of the air inflow hole 22a. Then, the rotary impeller 20 is coaxially fixed by a bolt B3 to a rotary shaft 41 of an electric motor 40 having a central shaft 23 placed at an opening position of a support plate 15c of the main body 10 and fixed by a bolt B5. It rotates with the rotation of 40. At this time, the bottom surface of the mounting portion 22b of the rotary impeller 20 is substantially flush with the bottom surface of the bottom plate 15a of the upper portion 15.

Inside the lower part 11, a cylindrical basket-shaped filter member 30 having an open upper surface is provided. The filter member 30 includes a bottom plate 31 made of stainless steel and a bottom plate 31.
Wire mesh cylinders 32a and 32b which are erected double around the circumference of
The flange portion 3 provided on the cylinders 32a and 32b toward the outside
3 and 3 are provided. The diameter of the upper opening of the filter member 30 is the same as the air inflow hole 22 of the lower disk 22 of the rotary impeller 20.
It is almost the same as the diameter of a. A filter material 34 is filled between the tubes 32a and 32b. As the filter material, a porous material having oil resistance, such as glass fiber, sponge, or ceramics, is used.

The filter member 30 is fixed to the mounting portion 22b of the lower disk 22 of the rotary impeller 20 by the bolt B4. Here, as shown in FIG. 2, a seal plate 35, which is an annular thin plate, is sandwiched between the mounting portion 22b and the flange portion 33 of the filter member 30. The material of the seal plate 35 may be any material having heat resistance, oil resistance, chemical resistance, and the like. For example, resin such as polyester or rubber such as nitrile rubber is used. The seal plate 35 is
The outer periphery thereof reaches up to the vicinity of the outer periphery of the inclined portion 15a2, and blocks the lower side portion 11 and the upper side portion 15 from each other. Further, as shown in FIG. 2, a shield plate 36 is provided between the air inlet 13 and the filter member 30 by being attached to the bottom plate 15a. As a result, the dirty air flowing in from the air inlet 13 directly passes through the filter member 3
Since it does not hit 0, the dirt removing action by the rotation of the filter member 30 is effectively exerted, the filter member becomes hard to become dirty, and its life can be extended. However, the shielding plate 36 may be removed as necessary.

As shown in FIG. 1, the electrostatic air cleaner M2 is provided with a rectangular parallelepiped main body 50 made of stainless steel, and a high voltage supply device 60 is provided on the front side surface of the main body 50. As shown in FIG. 3, the main body 50 is provided with a gas inlet 51 on the right side wall 50a, and the gas inlet 51 is connected to the exhaust outlet 16 of the centrifugal air cleaning section M1. The gas dispersion plate 51 is provided at a position near the left of the gas inlet 51.
a is provided to disperse the inflowing gas in the main body. A gas outlet 52 is provided on the left side wall 50b of the main body 50. The gas outlet 52 is provided with a perforated metal plate such as a punching metal plate or a wire mesh. As shown in FIG. 3, the main body 50 is provided with a bottom plate 50c slightly above the bottom surface, and the bottom plate 50c discharges water and oil separated from the gas supplied into the main body 50 to the outside. A drain device 50c1 is provided.

Near the right side wall 50a and the left side wall 50 in the main body
In the vicinity of b, -electrode support plates 53a and 53b are erected. The electrode support plates 53a and 53b are metal plates having a large number of holes such as a punching metal plate and a wire mesh plate, and the bottom wall 50c and the upper wall 50d in the main body 50.
It is supported by support members 54a and 54b provided on the inner side surfaces near the four corners. The supporting members 54a and 54b are made of an insulating material such as ceramics such as an insulator or a resin such as vinyl chloride or nylon SS, and it is particularly preferable to use ultra-high molecular weight polyethylene having excellent dielectric breakdown strength. -On the electrode support plates 53a and 53b, as shown in Figs. 3 and 4, -threaded rods 55 that form electrodes are arranged in parallel vertically and in the front and rear at regular intervals and fixed by a nut 55a. Has been done.

Between the threaded rods 55, as shown in FIGS. 3 and 5, a plurality of metal electrode plates 57 made of metal such as aluminum or stainless steel are erected parallel to each other in the front-rear direction. It is conductively supported by metal supporting members 56a and 56b provided on the inner side surfaces of the bottom wall 50c and the upper wall 50d in the main body 50. Then, the threaded rod 55 and the electrode plate 5
7 is connected to the high voltage generator 60 through a terminal (not shown).

A pair of front and rear air supply pumps 61 and 62 are provided on the upper portion of the main body 50, as shown in FIG. Then, the discharge port 61a of the air supply pump 61
The pipe P0 connected to the
P4 penetrates the front side plate 50e in the vicinity of the four corners of the front side plate 50e and extends into the main body 50. As shown in FIG. 3, the pipes P1 to P4 extended into the main body 50 have their tips at the positions near the support members 54a and 54b.
It is arranged so as to face 54b. Air supply pump 62
The same applies to.

Next, the operation of the embodiment configured as described above will be described. First, when the power switch (not shown) is turned on, the electric motor 40 starts rotating, and the rotary impeller 20 and the filter member 30 rotate accordingly. Then, the rotation of the rotary impeller 30 sucks air containing dirt such as oil mist, water, and dust from the air inlet 13. Due to the centrifugal force of the rotation of the filter member 30, most of the dirt, especially dirt having a large particle size, is struck by the inner wall of the lower part 11 to be removed by the centrifugal force of the rotation of the filter member 30, and the remaining oil, water, dust, etc. The dirt is removed by the filter action of the filter member 30. Smoke-like air containing dirt with a large particle size and containing dirt with a small particle diameter is sucked by the rotary impeller 20 and sucked by the upper portion 15,
Further, the air is discharged from the upper part 15 through the air discharge port 16.

As a result, most of the dirt is removed from the outside of the filter member 30, so that the dirt of the filter member 30 itself is alleviated and the filter member 30 can be used for a long time. Therefore, the labor of replacing the filter member 30 can be saved and the cost of the filter member 30 can be reduced. Also,
During operation of the air purifier, the gap between the opening 15a1 of the bottom plate 15a and the filter member 30 is covered by the seal plate 50 arranged below the bottom plate 15a, so that the inside of the lower part 11 becomes dirty. Air is reliably prevented from flowing into the upper part 15 through the gap. In particular, the seal plate 50
Since it is a thin plate, since it is slightly sucked from the upper portion 15 in the negative pressure state, the close contact with the bottom plate 15a is enhanced, so that the gap is satisfactorily sealed. In particular, in this embodiment, the bottom plate 15a is provided with the inclined portion 15a2, and the sealing plate 50 and the inclined portion 15a are brought into contact with each other smoothly, so that the sealing property of the sealing plate 50 is enhanced. This enhances the dirt removing ability of the air purifier. Further, since the seal plate 50 is a thin plate, the bottom plate 1 is rotated during rotation.
The contact resistance with 5a is very small, so that the rotating force of the electric motor 40 is not reduced, and unnecessary heat is hardly generated at the contact portion.

Next, the gas flowing into the electrostatic air cleaning section M2 through the air discharge port 16 is dispersed by 51a and evenly flows into the main body 50. Then, the voltage supply device 60 applies a DC high voltage using the threaded rod 55 as a negative electrode and the electrode plate 57 as a positive electrode via the negative electrode support plates 53a and 53b. Then, the gas containing smoke-like fine particles that has flowed into the main body is ionized by a high voltage, and the charged fine particle components are adsorbed to the electrode plate 57, whereby the fine particles are removed. At this time, the groove provided on the surface of the threaded rod 55 promotes the ionization of the gas, and the fine particle component is efficiently removed.

During the removal of the fine particles by the ionization,
Moisture contained in the gas inside the body-electrode support plate 53
It is condensed to a and 53b, and is collected by the support members 54a and 54b. However, air is sent from the air supply pumps 61 and 62 to the support members 54a and 54b, and the pipes P1 to P4
Since it is sprayed from the tip of the support member 54a, 54
Water does not accumulate while adhering to b. . Therefore, the support members 54a and 54b do not lose their insulating properties due to the adhesion of moisture, and it is possible to reliably prevent the electrode plate 57 and the-electrode support plates 53a and 53b from being short-circuited via the support members 54a and 54b. it can. Therefore, the function of removing particles of the electrostatic air cleaning unit M2 is not impaired. In the first embodiment, the centrifugal air cleaning section M1 is not limited to the above type, but a known air cleaner such as a cyclone type may be used. Further, an air purifier of a type using a filter that is not a centrifugal separation type may be used.

Next, a modification of the above embodiment will be described with reference to the drawings. FIG. 6 is a perspective view schematically showing an air cleaner according to the modification. This air purifier is provided with an air feeding device 70a or 70b on the gas outlet 52 side or the gas inlet 51 side of the electrostatic air purifier M2 instead of using the centrifugal air purifier M1. . That is, this air purifier is used when the gas contamination is mainly smoke-like fine particles. The air feeding devices 70a and 70b are composed of a fan that sucks gas and a fan motor. The electrostatic air purifier M2 is
It has the same configuration as the above embodiment.

In the modified example configured as described above,
Gas is supplied to the inside of the main body by the fan, the fine particle components are removed as described above, and further discharged to the outside of the main body by the fan. Then, also in the present modified example, as in the above-described embodiment, during the removal of fine particles by ionization, the water contained in the gas is condensed in the main body-on the electrode support plate, and when collected on the support member, the pipe is Adhesion of moisture is prevented by the air blown from the tip of the.
Then, it is possible to reliably prevent a short circuit between the electrode plate and the-electrode support plate via the support member, and the air cleaning function is not impaired.

The electrode shapes of the electrostatic air cleaners according to the above-described embodiments and modifications are not limited to those in the above-mentioned embodiments, and the shape may be changed such that the rod-shaped body is made into a plate-shaped body. Yes, and voltage application can be reversed. Further, the shapes of the electrostatic air cleaners according to the above-mentioned embodiments and modifications are not limited to the above-mentioned embodiments, and can be appropriately changed according to the intended use.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an air cleaner according to an embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing a centrifugal separation air cleaning section M1 of the same air cleaner.

FIG. 3 is a vertical cross-sectional front view showing an electrostatic air cleaner M2 of the same air cleaner.

FIG. 4 is a cross-sectional view showing a IV-IV direction in FIG.

5 is a cross-sectional view showing a VV direction in FIG.

FIG. 6 is a schematic perspective view of an air cleaner according to a modification.

[Explanation of symbols]

10 ... Main body, 11 ... Lower part, 13 ... Air inlet, 15 ...
Upper part, 15a ... Bottom plate, 15a1 ... Opening, 15a2 ... Inclined part, 15b ... Upper plate, 15c ... Support plate, 16 ... Air discharge port, 20 ... Rotating impeller, 21 ... Upper disc, 22 ... Lower disc,
23 ... Central axis, 24 ... Blade, 30 ... Filter member, 31
... bottom plate, 32a, 32b ... cylinder, 33 ... flange part, 33
a ... inclined part, 34 ... filter material, 40 ... electric motor,
41 ... Rotating shaft, 50 ... Main body, 51 ... Gas inlet, 52 ...
Gas outlets, 53a, 53b ...- Electrode support plate, 54a,
54b ... Support member, 55 ... Threaded rod, 56a, 56b
... Metal support member, 57 ... Electrode plate, 60 ... High voltage generator, 61, 62 ... Air supply pump, 70a, 70b ... Air feeding device, B1-B5 ... Bolt, P0-P4 ... Pipe, M1 ... Centrifugal separation Air purifier, M2 ... Electrostatic air purifier.

Claims (4)

[Claims] 1. A main body in which a gas inlet is provided on one side surface of the rectangular parallelepiped container and a gas outlet is provided on the other side surface of the rectangular parallelepiped container, and the main body is arranged in parallel with each other in the main body and has a conductive state on the inner wall surface of the main body. A plurality of first electrode members supported by, a plurality of second electrode members arranged corresponding to the first electrode members, and insulation for supporting the second electrode members on the inner wall surface of the main body in an insulating state. Conductive electrode supporting member, a power supply device that supplies a high voltage between the first electrode member and the second electrode member, and one end that penetrates the wall surface of the main body and has one end near the inner wall surface of the insulating electrode supporting member. An air purifier comprising: an air supply pipe arranged toward the insulating electrode support member; and an air supply device for supplying air into the air supply pipe from the other end of the air supply pipe. 2. A main body in which a gas inlet is provided on one side surface of a rectangular parallelepiped container and a gas outlet is provided on a side surface facing the same side surface, and both ends of the main body are parallel to each other in the direction of the both side surfaces. A plurality of first electrode members that are arranged and supported in an electrically conductive state on the inner wall surface of the main body, and are arranged substantially parallel to both side surfaces of the main body at positions near both side surfaces of the main body, and are attached to the inner wall surface. An electrode support member supported by an insulative support member in an insulated state from the main body; a plurality of second electrode members disposed between the first electrode members and having both ends fixed to the electrode support member; A power supply device that supplies a high voltage between the first electrode member and the second electrode member, and one end penetrating the wall surface of the main body is disposed in the vicinity of the insulating support member toward the insulating support member. Air supply pipe and the other end of the air supply pipe into the air supply pipe An air cleaner provided with an air supply device for supplying air. 3. The air cleaner according to claim 1 or 2, wherein the first electrode member or the second electrode member is a rod-shaped body having a groove. 4. The air cleaner according to any one of claims 1 to 3, wherein the insulating support member is formed of an ultra-high molecular weight polyethylene material.