JPH07191Y2 - Electric dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electrostatic precipitator used in an apparatus for cleaning air, and in particular, an electrostatic precipitator for charging dust in the air and collecting it by electrostatic force. Regarding dust equipment.

[Prior Art] An air cleaning device is a device that sucks indoor air with a blower fan or the like and cleans the sucked indoor air. A relatively large amount of dust contained in the indoor air is collected by the prefilter. The dust not collected by the pre-filter is collected by the electrostatic precipitator.

FIG. 5 is a schematic side sectional view of an essential part of an example of a conventional electrostatic precipitator. Referring to FIG. 6, the conventional electrostatic precipitator has a pre-filter 102 for recovering relatively large dust from the air flowing in the direction of the arrow A in a duct (not shown), and an air flow. Against prefilter 102
A discharge unit 104 provided on the downstream side of the discharge unit for applying a predetermined charge to dust in the air by corona discharge, and a filter 106 provided on the downstream side of the discharge unit 104 for collecting the dust by electrostatic force. Including.

The discharge unit 104 is made of a plate-shaped conductor, is disposed at a predetermined distance from the discharge plate 108 that is one pole of corona discharge, and is made of a tungsten wire or the like, and is the other pole of the corona discharge. And a discharge electrode line 110.

The filter 106 is a fine mesh formed of resin or the like, for example.

The conventional dust collector shown in FIG. 6 operates as follows. The air flowing in the direction of the arrow A in the duct (not shown) first passes through the prefilter 102. Of the dust 112 contained in the air, a comparatively large one adheres to the pre-filter 102.

In the discharge unit 104, a high voltage is applied between the discharge plate 108 and the discharge electrode line 110 so that the discharge plate 108 has a high potential. In the discharge section 104, corona discharge occurs between the discharge plate 108 and the discharge wire 110 due to this high voltage.

In the air that has passed through the pre-filter 102 and has flowed into the discharge unit 104, minute dust that cannot be removed by the pre-filter 102 exists. These dusts have a negative charge due to corona discharge in the discharge unit 104. The air containing dust, which is negatively charged, further advances along the arrow A and reaches the filter 106.

A predetermined positive potential is applied to the filter 106 in advance. Therefore, the negatively charged dust adheres to the filter 106 by electrostatic force. As a result, the air passing through this electrostatic precipitator becomes clean with dust removed.

FIG. 7 is a schematic view showing the principle of another example of the conventional electrostatic precipitator. Referring to FIG. 7, this electrostatic precipitator includes a pre-filter 102 for collecting relatively large dust 112 and a pre-filter 102 for collecting relatively large dust 112 from air flowing in a duct (not shown) in a direction indicated by an arrow A. And an electrode unit 114 for removing small dust from the passing air.

The electrode portion 114 is provided over a predetermined length along the air flow direction, serves as one pole of corona discharge, and has a discharge plate 116 for removing charged dust by electrostatic force, and the discharge plate 116. Near the end on the upstream side of the air flow, a discharge electrode 116 is provided at a predetermined distance from the discharge plate 116, and a discharge electrode line 118 made of a tungsten wire or the like that serves as the other pole of the corona discharge is included.

The operation of this electrostatic precipitator will be described below with reference to FIG. Between the discharge plate 116 and the discharge electrode 118, the discharge plate
A high voltage is applied so that 116 becomes a positive potential. If this voltage is sufficiently large, corona discharge will occur between the discharge plate 116 and the discharge electrode wire 118.

Air flows in the direction indicated by arrow A. Of the dust 112 contained in the circulating air, a relatively large dust adheres to the pre-filter 102. The dust that has not adhered to the pre-filter 102 becomes negatively charged due to corona discharge between the discharge plate 116 and the discharge electrode 118. Discharge plate 116
Has a positive potential. Therefore, the pre-filter
Most of the dust that has passed through 102 is discharged to the discharge plate 1 by electrostatic force.
Attach to 16.

FIG. 8 is a schematic sectional view of still another example of the conventional electrostatic precipitator. Referring to FIG. 8, this electrostatic precipitator
It includes a discharge electrode 120 serving as one pole of corona discharge, a discharge electrode 122 serving as the other pole of corona discharge, and a case 124 for housing the discharge electrodes 120, 122. The tip of the discharge electrode 122 is formed in a needle shape so that corona discharge can easily occur even at a low voltage. The discharge electrode 120 is provided on the discharge electrode 122 side of the back plate 128 having a large number of openings 126. Case 12
4 has an opening 130 for circulating air.

The operation of this electrostatic precipitator will be described with reference to FIG. A high voltage is applied between the discharge electrodes 120 and 122. Air flows in the direction of arrow A. Dust in the air that has entered the electrostatic precipitator through the opening 126 is charged by corona discharge between the discharge electrodes 120 and 122, and an electrostatic force is applied to one of the discharge electrodes 120 and 122 according to the charged potential. Adheres by. The clean air from which dust has been removed goes out of the electrostatic precipitator through the opening 130.

[Problems to be Solved by the Invention] An electrostatic precipitator that removes dust by electrostatic force has an advantage of being able to remove much finer dust than an ordinary filter. However, it has been pointed out that the conventional electrostatic precipitator has a problem in maintainability.

In the electrostatic precipitator shown in FIG. 6, its function deteriorates due to the dust adhering to the filter 106 as the cumulative use time increases. The filter 106 is made of a special resin, and it is impossible to wash the filter 106 to remove the attached dust. Therefore, it is necessary to replace the filter 106 with a new one each time. Moreover, the discharge electrode wire is required for replacement.
There is also a risk of accidentally disconnecting 110.

As for the second example of the conventional electrostatic precipitator, the filter 10
There is no need to replace the 6. By periodically cleaning the discharge plate 116 on which dust is attached, it is possible to exhibit a good function again. However, with the discharge line 118,
Since the discharge plate 116 to which dust is attached is in close proximity to the discharge plate 116, it is difficult to clean the discharge plate 116, and the discharge electrode 118 may be accidentally broken during cleaning.

In the third conventional example, due to its structure, the discharge electrode to which dust adheres
It is very difficult to clean 120, 122. Moreover, since the tip of the discharge electrode 122 is sharp, an operator may be injured.

Further, in any of the conventional examples, when the device is thinned, there is a problem that maintenance work for maintaining performance becomes difficult.

Therefore, an object of the present invention is to provide a thin electrostatic precipitator that can effectively collect dust in the air and can easily and surely perform maintenance work for maintaining its performance. It is to be.

[Means for Solving the Problem] An electrostatic precipitator according to the present invention is provided in a path through which air flows from an upstream side to a downstream side, and collects particles contained in the air. The dust device is composed of a decomposable discharge means and a collection means, each of which has a substantially flat plate shape. The discharge means is a discharge plate having an air flow port formed by bending a flat plate toward the collecting means side, a dust collecting frame having an opening into which the bend forming part of the discharge plate can be inserted, and a discharge plate fold. It is provided so as to be located inside the curved air circulation port, and is composed of a discharge electrode line and a terminal for supplying high-voltage power to the discharge means. The collecting means is detachably attached to the dust collecting frame, and is located at a position facing a portion other than the air circulation port of the discharge plate,
It has an air outlet that is cut and raised toward the discharge means side and processed by molding. The collecting means can be reused by removing the collected particles.

[Operation] In the electrostatic precipitator having the above configuration, the collecting means can be removed from the discharging means. The insides of the collecting means and the discharging means are exposed by being removed from each other. Therefore, the inside of them can be easily cleaned. Since the discharge electrode wire is provided inside the air circulation port, dust in the air can be effectively charged. Further, since the air outlet of the collecting means is formed at a position facing the portion other than the air passage of the discharge plate, the charged dust is effectively collected at the portion other than the air outlet. be able to.

[Embodiment] FIG. 1 and FIG. 2 are schematic diagrams showing the principle configuration of an embodiment of the present invention. With reference to FIG. 1, this electrostatic precipitator is provided in an air flow passage, and includes a pre-filter 10 for removing relatively large dust 112 in the air by filtration, and a pre-filter 10. A corona discharge is performed to the passing air, and a discharge unit 12 for charging dust 112 in the air to a predetermined polarity, for example, a negative charge, and a detachable mount on the downstream side of the discharge unit 12 to generate a negative charge. Dust collector for collecting charged dust by electrostatic force
Including 14 and.

The discharge unit 12 is given a positive potential, is given a negative potential that is a high voltage with respect to the positive potential of the discharge plate 16 and the discharge plate 16 that is one pole of the corona discharge, and from the Tang ten wire or the like. Negative corona discharge, the other pole of the discharge line
Including 18 and. The dust collecting part 14 includes a dust collecting electrode 20 to which a positive potential equal to that of the discharge plate 16 is applied.

The operation of this electrostatic precipitator will be described with reference to FIG. Air flows in the direction indicated by arrow A in FIG. A relatively large amount of dust 112 in the air adheres to the prefilter 10. Corona discharge occurs between the discharge plate 16 and the discharge wire 18, and the dust 112 in the air is charged with a negative charge.

The dust 112 charged with a negative charge enters the dust collecting unit 14. Since the dust collecting electrode 20 is given a positive potential,
The dust 112 is collected by the electrostatic force between the dust collecting electrode 20 and the dust collecting electrode 2
Attach to 0. Therefore, the air flowing out from the dust collecting unit 14 becomes clean with less dust.

If a large amount of dust adheres to the dust collecting electrode 20, the collection efficiency will decrease. Therefore, it is necessary to regularly clean or wash the dust collecting electrode 20. The features of the device shown in FIG.
This means that the dust collecting unit 14 can be removed from the discharging unit 12. A state in which the dust collecting portion 14 is removed from the discharging portion 12 is shown in FIG.

Since the dust collecting part 14 is removable from the discharge part 12, the discharge plate 16, the discharge electrode wire 18, and the dust collecting electrode 20 are exposed. Since there are few obstacles, cleaning and washing of these parts can be performed very easily, safely, and surely. There is little risk of disconnecting the discharge electrode wire 18 when cleaning the dust collecting electrode 20.

FIG. 3 is a perspective view of another more specific embodiment of the electrostatic precipitator according to the present invention. FIG. 3A is an exploded perspective view of the device shown in FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 is a side sectional view of a cold / hot air fan as an example of use of this electric dust collector.

With reference to FIG. 5, the cool / hot air blower includes a cool air generating unit 24 provided in the frame 22, a heat exchanging unit 28 arranged to separate the cold air generating unit 24 and the heat insulating wall 26, and a frame 22. A drainage tank 30 provided at a lower portion for accumulating wastewater generated when cold air is generated.

The cold air generating unit 24 includes the pre-filter 10 provided on the front surface thereof.
An electrostatic precipitator 32 according to the present invention placed adjacent to the pre-filter 10, and provided adjacent to the electrostatic precipitator 32, evaporating the low-pressure gas inside, and circulating it by the heat of vaporization. It includes an evaporator 34 for cooling the cooling air and a sirocco fan 36 for rotating and drawing air from the part of the prefilter 10. At the upper front portion of the frame 22, a cold air outlet 38 through which the air sucked by the sirocco fan 36 is blown out.
Is provided.

The heat exchange unit 28 is connected to a filter 40 for sucking air from the back surface of the cool / hot air fan and removing the dust and an evaporator 34, and cools the gas vaporized by the evaporator 34 with the air to condense it. A condenser 42 for rotating and a filter by rotating
A turbo fan 44 for drawing air through 40. An exhaust heat outlet 46 is provided in the upper rear portion of the frame 22 for discharging the air whose temperature has risen due to heat exchange in the condenser 42.

A motor 46 for rotating the sirocco fan 36 and the turbo fan 44 is provided at the center of the heat insulating wall 26 that separates the cold air generating unit 24 and the heat exchange unit 28.

The rotation of the motor 46 causes the sirocco fan 36 and the turbo fan 44 to rotate together. Due to the rotation of the sirocco fan 36, air flows from the front surface of the frame 22 into the cold air generating unit 24 through the pre-filter 10. Large dust in the air is removed by the prefilter 10. Small dust is removed by the electrostatic precipitator 32. Air further evaporates 34
Is dehumidified and cooled by and is blown out from the cold air outlet 10. During dehumidification, the water vapor in the air condenses to form water droplets, which fall downward and collect in the drain tank 30.

Due to the rotation of the turbo fan 44, air flows into the heat exchange section 28 from the rear surface through the filter 40. Air condenser
The gas in 42 is cooled and condensed, and the temperature of the gas itself rises and is discharged from the waste heat outlet 46 to the rear surface of the frame 22.

By the above-mentioned operation, a low temperature and clean air flow can be obtained in the front surface of the cold air heater.

Referring to FIGS. 3 to 4, the electrostatic precipitator 32 of this embodiment includes a discharge part 12 and a dust collector 14. The discharge unit 12 is
A dust collection frame 48 made of ABS (acrylo-nitrile-butadiene copolymer) resin or the like, and a discharge plate 16 made of a bent zinc iron plate fixed to the dust collection frame 48 by four mounting screws 50, A terminal plate 60 fixed to the dust collection frame 48, for connecting the discharge unit 12 and a high-voltage power source (not shown), and formed of a stainless steel plate or the like, and fixed to the terminal plate 60, on the surface of the dust collection frame 48. And a discharge electrode wire 18 such as a tungsten wire that extends along the longitudinal direction of the opening formed on the discharge plate 16 by bending and serves as one pole of the corona discharge.

The dust collecting frame 48 is provided with an opening into which the bent portion of the discharge plate 16 can enter.

The dust collecting portion 14 is formed only by cutting and raising, and includes an aluminum plate 52 having an opening in the same direction as the opening of the discharge plate 16. By doing so, the aluminum material forming the aluminum plate 52 is used without waste, and the entire area of the aluminum plate 52 can be utilized as an effective area for collecting dust.

Mounting tabs 54 are provided at four locations around the aluminum plate 52. A fixing protrusion 56 is provided inside the portion of the dust collecting frame 48 corresponding to the mounting claw 54. Therefore,
By fitting the mounting claw 54 and the fixing protrusion 56,
The dust collecting plate 52 is fixed to the dust collecting frame 48.

A cutout 58 is formed in one place around the dust collecting frame 48.
A contact portion 62 is provided on the aluminum plate 52 at a location corresponding to the cutout 58. A contact portion 64 is provided on the discharge plate 16 at a position corresponding to the notch 58. When the aluminum plate 52 is attached to the dust collecting frame 48, the contact portions 62 and 64 contact each other,
The aluminum plate 52 and the discharge plate 16 are kept at the same potential.

Two notches 66 for removal are formed on one side of the periphery of the aluminum plate 52. Aluminum plate 52
To remove the from the dust collecting frame 48, a finger may be inserted into the removing notch 66 to pull the aluminum plate 52, and at the same time, the fitting between the mounting claw 54 and the fixing projection 56 may be slightly loosened.

A fixing hole 68 is formed in the terminal plate 60. The dust collecting frame 48 is formed with a convex portion 70 for fixing the terminal plate 60. After the projection 70 is fitted into the fixing hole 68, AB
The terminal plate 60 is attached to the dust collection frame 4 due to the heat fixation by S resin.
Fixed at 8.

A terminal plate contact 72 is formed at one end of the terminal plate 60. A protrusion 74 for fixing the discharge electrode wire 18 is provided on the terminal plate 60. A notch 76 is formed in a portion of the dust collecting frame 48 corresponding to the terminal plate contact 72.

The operation of the electrostatic precipitator will be described with reference to FIGS. 3, 3A, and 4. Usually, the aluminum plate 52 is attached to the dust collecting frame 48. A high voltage is applied between the contact portions 62, 64 and the terminal plate contact 72 so that the terminal plate contact 72 side has a negative potential and the contact portions 62, 64 side has a positive potential. Therefore, a high electric field is formed between the discharge electrode line 18 and the discharge plate 16 to cause corona discharge.

Air flows in the direction of arrow A. Electrode wire 18 and discharge plate 16
The dust in the air that passes through the gap between and is charged with a negative charge. Since the aluminum plate 52 has a positive potential, the dust charged with a negative charge has an electrostatic force.
Attach to 52. The air flowing out from the opening of the aluminum plate 52 becomes clean without dust. Also,
Part of the dust also adheres to the discharge plate 16.

The procedure for cleaning the dust collected by the electric dust collector 32 will be described below. As mentioned above, the aluminum plate 52 is
It is easily removed from the dust collecting frame 48. The back side of the aluminum plate 52 is exposed by being removed from the dust collecting frame 48. Therefore, the dust attached to the aluminum plate 52 can be easily removed by washing. Also, the discharge plate 16
The inside of is also exposed. Therefore, the inner surface of the discharge plate 16 can be easily cleaned. Since the discharge electrode is not formed in a needle shape, cleaning can be performed safely.
Also, since the structure when disassembled is simple, it is possible to surely clean every corner. At this time, aluminum plate
Since 52 is separated from the discharge electrode wire 18, the discharge electrode wire 18 is less likely to be broken.

The electrostatic precipitator according to the present invention can be easily maintained even by a user who is unfamiliar with the maintenance work, and thus has an advantage that it can be applied to a home air conditioner or the like.

The electrostatic precipitator described in this specification is merely an example, and various applications can be considered. For example, the material and the number of electrodes for collecting dust or discharging are not limited to this embodiment. Also, their structure can be variously modified.

[Effect] The electrostatic precipitator according to the present invention includes a discharging unit that charges particles in the air and a collecting unit that collects the charged particles by an electrostatic force, and both are removable from each other.

The air flowing into the electrostatic precipitator from the air circulation port is effectively charged because the discharge electrode wire is provided inside the air circulation port. Further, since the air outlet of the collecting means is provided at a position facing the portion other than the air circulating opening, dust is effectively collected by the collecting means. Both the discharging means and the collecting means are formed in a flat plate shape, so that the entire device can be made thin.

Parts of the discharging means and the collecting means to which dust adheres are exposed by removing them from each other. Also inside the discharge means,
Both the inside of the collecting means can be easily cleaned. Further, since the collecting means can be cleaned separately from the discharging means, there is little risk of disconnecting the wiring for discharging in the discharging means. Therefore, the collecting means can be surely cleaned. The collected collecting means is attached to the discharging means again and can be reused in good condition.

That is, according to the present invention, it is possible to effectively collect dust, and maintenance work for maintaining performance is further performed.
It is possible to provide a thin type electrostatic precipitator that can be easily and reliably performed.

[Brief description of drawings]

FIG. 1 is a principle schematic diagram showing an operating state of the electrostatic precipitator of one embodiment of the present invention, and FIG. 2 is a schematic diagram showing another state of the electrostatic precipitator of FIG. FIG. 3 is a perspective view of an electrostatic precipitator according to an embodiment of the present invention, FIG. 3A is an exploded perspective view of the device shown in FIG. 3, and FIG. 4 is a IV-IV of FIG. FIG. 5 is a cross-sectional view taken along the direction of arrows, FIG. 5 is a cross-sectional view of a cold / hot air fan which is an example of using the electric dust collector shown in FIG. 3, and FIG. FIG. 7 is a schematic sectional view of an example, FIG. 7 is a schematic sectional view of a second example of a conventional electrostatic precipitator, and FIG. 8 is a schematic of a third example of a conventional electrostatic precipitator. FIG. In the figure, 10 is a prefilter, 12 is a discharge part, 14 is a dust collecting part, 16 is a discharge plate, 18 is a discharge electrode wire, 20 is a dust collecting electrode, and 48 is a dust collecting frame. The same reference numerals in the drawings indicate the same or corresponding portions.

Continued Front Page (56) References Open 62-151957 (JP, U) Open 62-83550 (JP, U) Open 63-39444 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An electrostatic precipitator provided in a path through which air flows from an upstream side to a downstream side, for collecting particles contained in the flowing air, wherein the electrostatic precipitator comprises: Each formed into a substantially flat plate shape,
Dischargeable discharge means and collecting means, wherein the discharging means is a discharge plate having an air flow port formed by bending a flat plate toward the collecting means, and a bending forming portion of the discharge plate is inserted. A dust collection frame having a possible opening, and a discharge electrode wire and a terminal which are provided so as to be located inside the bent-shaped air circulation port of the discharge plate and which supplies high-voltage power to the discharge means. The collecting means is detachably attached to the dust collecting frame, and is formed by cutting and raising toward the discharging means side at a position facing a portion other than the air circulation port of the discharge plate. An electrostatic precipitator having an air outlet, wherein the collecting means can be reused by removing the collected particles.