JPH04346851A - Electric precipitator - Google Patents

Abstract

PURPOSE:To provide an electric precipitator Which maintains high dust collecting function without changing basic structure of a dust collector part, collects dust with whole conductive layer, prolongs the period to double before removing and cleaning work of dust and reduces handling work. CONSTITUTION:Collecting work is executed with switching of positive-negative polarity of the conductive layer 19 of the dust collector part 12a. The dust is practically stuck on the conductive layer of the negative electrode side which is half of the conductive layer constituting the dust collector part. By switching positive-negative polarity of the conductive layer, all of the conductive layer is used and interval to removing and cleaning work of dust becomes double.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic precipitator incorporated into, for example, an air conditioner.

0002

[Prior Art] Recently, electrostatic precipitators have been installed in the heat exchanger of an air conditioner to capture fine dust contained in the air in an air conditioned room that is circulated by the air conditioner and to keep it in a clean state. It is being integrated into the front.

[0003] Specifically, it is as shown in FIG. In the figure, reference numeral 1 indicates an air conditioner main body, and a front plate 2 constituting the front surface of the main body 1 is provided with an inlet 3, and a lower part thereof is provided with an outlet 4. The front plate 2 can be opened toward the front at its lower end with its upper end serving as a pivot point. The air outlet 4 is provided with a louver 5 for switching the air blowing direction.

[0004] A heat exchanger 6 is disposed within the air conditioner main body 1 with its upper end inclined backward from its lower end. A blower 7 is disposed at the lower part of the back side of the heat exchanger 6, and conducts the air from the air-conditioned room from the suction port 3 to the heat exchanger 6 for heat exchange, and then from the air outlet 4 to the air-conditioned room. It is supposed to blow out. An electrostatic precipitator S is provided on the upper front side of the heat exchanger 6. The electrostatic precipitator S is shown in FIGS. 7 and 8. That is, the electrostatic precipitator S includes an ionization section 11 provided in the main frame 10 and a dust collector section 12.

The ionization section 11 includes an ionization wire 13 that is a discharge electrode stretched in a meandering manner, and an ionization wire 13 that is a discharge electrode stretched in a meandering manner.
and a counter electrode plate 14 provided facing each other. The counter electrode plate 14 is detachably attached to the upper frame 15, and a plurality of through holes 16 are provided at predetermined intervals on the plate surface at positions opposite to each other between the ionized wires 13. . Note that the upper frame 15 is detachably attached to the main frame 10.

The counter electrode plate 14 is made by bending a metal plate, such as a stainless steel plate, into a U-shaped cross section, and the through hole 16 of the upper frame 15 is formed on the plate surface.
A plurality of electrode portions 14a, which fit into the inner surface, are cut and raised on the inner surface side. In other words, the ionization wires 13 are arranged to face each other between the electrode portions 14a.

The dust collector section 12 has a rectangular frame 17 that is detachably attached to the main frame 10, and a large number of strip-shaped electrode sheets 18 are stacked and held at predetermined intervals. A conductive layer 19 coated with conductive paint is provided on one surface of these electrode sheets 18, and the entire surface of this conductive layer 19 is covered with a semiconductor coating film 20. On the other hand, a handle 21 is integrally formed in a portion of the frame 17 that projects downward from the main frame 10.

In the electrical connection of such an electrostatic precipitator S, a high voltage is applied to the ionization wire 13, while the counter electrode plate 14 is grounded. The above dust collector part 1
2, the conductive layer 1 of every other electrode sheet 18 is
A high voltage is applied to 9, and the other conductive layer 19 is all grounded.

[0009] Thus, as shown by the arrow in the figure, the air to be collected, which is the air in the conditioned room, is guided. The above ionization section 1
1, an ion discharge is generated from the ionization line 13 to the counter electrode plate 14, and fine dust particles contained in the air to be collected passing through the line are ionized and charged with a positive charge.

The air to be collected containing the positively charged dust particles is led to the dust collector section 12 and passes between the electrode sheets 18. Since the conductive layer 19 applied to each electrode sheet 18 is connected to the positive and negative electrodes of each electrode sheet 18, a high electric field is formed between them.

The positively charged dust particles are captured by the conductive layer 19 on the negative electrode side by Coulomb force,
Dust is collected. Therefore, the air in the air-conditioned room drawn out from the electrostatic precipitator S is purified, and in this state is led to the heat exchanger 6, where the necessary heat exchange action is performed.

0012

[Problem to be Solved by the Invention] In such an electrostatic precipitator S, since the dust collector section 12 traps and collects dust extremely effectively, clogging due to the trapped dust occurs in a relatively short period of time. . If left as is, the dust collection function will deteriorate and the heat exchanger 6 will become resistant to ventilation.
This will reduce the heat exchange efficiency to .

Therefore, the user must remove the dust collector section 12 from the air conditioner main body 1 and clean it at appropriate intervals to remove the dust attached thereto. The dust collector section 12 can be easily removed from the main frame 10 by holding the handle 21 and pulling it down, and can be inserted and removed by pushing up.

However, in the dust collector section 12, it is the conductive layer 19 on the negative electrode side that actually captures dust, and the conductive layer 19 on the positive electrode side does not trap dust. That is, when looking at the entire dust collection collector section 12, only half of the conductive layer 19 exhibits a dust collection function, but all of it must be cleaned.

The present invention has been made in view of the above circumstances, and its purpose is to maintain a high dust collection function without changing the basic configuration of the dust collection collector section, and to improve the overall conductive layer. The present invention provides an electrostatic precipitator that enables dust to be captured using a dust collector, doubles the period of time for dust removal and cleaning work, and reduces work effort.

[0016]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an ionization section that charges dust particles contained in the air to be collected by ion discharge from a discharge electrode to a counter electrode plate. A dust collecting collector section is provided, which holds a conductive layer and a negative conductive layer stacked at a predetermined interval, conducts the air to be collected between these layers, and captures and collects charged dust particles by Coulomb force. The collector section is
This electrostatic precipitator is characterized in that the plus/minus polarity of the conductive layer can be switched as required.

[0017]

[Operation] The air to be collected is ionized by discharging from the discharge electrode to the counter electrode plate, these ions charge the dust particles contained in the air to be collected to a positive charge, and these positively charged dust particles are collected. It is attached to the conductive layer on the negative electrode side of the dust collector section to remove dust particles from the air to be collected.

[0018] When the above-mentioned dust collection operation is continued for a predetermined period and the polarity of the conductive layer of the dust collection collector section is switched between positive and negative, and the dust collection operation is performed again, the dust is transferred to the conductive layer with changed polarity. attached. This dust collecting action is continued for a predetermined period of time, and only after that period has ended is the dust collector section removed and the dust removed and cleaned.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 3, the electrostatic precipitator S described later
a is provided on the front side of the heat exchanger 6 housed in the air conditioner main body 1 as in the past, and is mounted on the main frame 1.
The ionization section 11 and the dust collector section 12 arranged at
It consists of A.

The ionizing section 11, like the conventional one, is composed of an ionizing wire 13 which is a discharge electrode and a counter electrode plate 14, and the same parts as those described above are given the same numbers and a new explanation will be given. omitted.

The dust collector section 12A is also provided integrally with a frame body 17 having a handle 21, as in the conventional one, and the frame body 17 can be attached to and detached from the main frame 10 at will. However, the handle 21 is provided with recesses 22a and 22b on its front and back sides for hanging fingers.

A large number of strip-shaped electrode sheets 18 are stacked and held on the frame 17 at predetermined intervals. A conductive layer 19 coated with conductive paint is provided on one surface of these electrode sheets 18, and the entire surface of these conductive layers 19 is covered with a semiconductor coating film 20.

In particular, as shown in FIG.
A plurality of convex portions 23 are integrally provided on the lower surface at predetermined intervals in the longitudinal direction, and the tips of these convex portions 23 are placed on the semiconductor coating film 20 on the lower side. For this reason, the mutual lamination interval between the electrode sheets 18 is kept constant.

In the electrode sheet 18 having the above structure, different longitudinal ends of the conductive layer 19 are exposed every other sheet in the vertical direction. That is, if the conductive layer 19 of the odd-numbered electrode sheet 18 from the top is exposed at one end in the longitudinal direction, the conductive layer 19 of the even-numbered electrode sheet 18 is exposed.
9 is in an exposed state at the other end in the longitudinal direction.

As shown in the same figure and FIG. 4, the portion exposed at one longitudinal end of the conductive layer 19 is
It is electrically connected to a first electrode contact 24 provided at one end of the electrode 7 . The exposed portion of the conductive layer 19 at the other end in the longitudinal direction is electrically connected to a second electrode contact 25 provided at the other end of the frame 17 .

In FIG. 2A, with the dust collector section 12A attached to the main frame 10, the first electrode contact 24 is connected to the positive electrode 26a of the high voltage power source 26. Then, the second electrode contactor 25 is connected to the earth side electrode 27.

From this state, once the dust collector section 12A is pulled out from the main frame 10, reversed and then inserted into the main frame 10 again,
As shown in FIG. 2(B), the second electrode contact 25 is now connected to the positive side electrode 26a of the high voltage power supply, and the first electrode contact 24 is connected to the ground side electrode. become. FIG. 1 shows the electrical connection of such an electrostatic precipitator Sa and its operating state.

A high voltage is applied to the ionization line 13, while the counter electrode plate 14 is grounded. In the electrode sheets 18 in the dust collector section 12A, a high voltage is applied to every other conductive layer 19, and the other conductive layer 19 is grounded.

Here, the electrical connection shown in FIG. 1(A) and
The electrical connection state of the dust collector part shown in Fig. 2(A) matches, and the electrical connection state of the dust collecting collector part shown in Fig. 2(B) matches the electrical connection state shown in Fig. 1(B). .

[0031] As shown by the arrow, the air to be collected, which is the air in the air conditioned room, is guided to the electrostatic precipitator Sa. In the ionization unit 11, ion discharge is performed from the ionization line 13 to the counter electrode plate 14, and fine dust particles contained in the air to be collected passing through the ionization unit 11 are ionized and charged with a positive charge.

The air to be collected containing the positively charged dust particles is guided to the dust collector section 12A and passes between the electrode sheets 18. Since the conductive layer 19 applied to each electrode sheet 18 is connected to the positive and negative electrodes of each electrode sheet 18, a high electric field is formed between them.

[0033] The positively charged dust particles are captured by the conductive layer 19 on the negative electrode side by Coulomb force, and are collected. The air in the air-conditioned room drawn out from the electrostatic precipitator S is purified, and in this state is led to the heat exchanger 6, where the necessary heat exchange action is performed.

When the device is used for a period of time in the conditions shown in FIGS. 1(A) and 2(A), the removed dust collects in the dust collector section 12A.
Therefore, it is necessary to remove the adhering dust at appropriate intervals. However, in reality, dust is only attached to the surface of the electrode sheet 18 having the conductive layer 19 connected to the negative electrode side, and the dust is only attached to the surface of the electrode sheet 18 having the conductive layer 19 connected to the positive side
No dust is attached to the surface of the electrode sheet 18.

Therefore, once the dust collection operation is stopped, hold the handle 21 of the frame 17, remove the dust collector part 12A, turn it over, and then attach the main frame 10 again.
Insert it into the specified position. Recesses 22a, 2 in the handle 21
2b, it can be easily attached and detached even if the dust collector section 12A is turned over.

As a result, as shown in FIG. 1(B) and FIG. 2(B), the conductive layer 19 in the dust collector portion 12A
Electrical connections are made with the positive and negative polarities of the terminals completely reversed. The dust collection effect continues without any change, and the conductive layer 19, which is now on the negative electrode side,
collects dust and maintains high dust collection efficiency.

If the device is used for approximately the same period as before, the removed dust will accumulate, so the adhering dust will be removed this time. In the end, the period for dust removal work was extended to double the previous period,
You can reduce your effort.

In the above embodiment, in order to change the plus/minus polarity of the dust collector section 12A, the dust collector section 12A is pulled out from the main frame 10, turned over with its front and back sides, and then inserted again. However, it is not limited to this.

For example, as shown in FIG.
The dust collector section 12B may be connected to the positive side electrode and the negative side electrode of the power source 29 via 8.

With this configuration, in the figure, the odd-numbered conductive layers 19 from the top are connected to the negative side, and the even-numbered conductive layers 19 are connected to the positive side, and the changeover switch 28 When the polarity of the conductive layer 19 is switched, the polarity of the conductive layer 19 is immediately reversed. That is, the dust collector section 12
This saves the trouble of taking out B and reversing it.

Note that a timer (not shown) may be connected to the changeover switch 28, and instead of the user operating the changeover switch 28, the timer may be driven to invert the polarity at regular intervals.

[0042] Alternatively, a dust collector section may be formed by connecting each conductive layer 19 to an AC power source. Since the polarity is always reversed for each frequency when electricity is applied to perform a dust collection function, dust collection can be performed on all conductive layers 19 without changing the structure of the dust collection collector section itself. In addition, various modifications can be made within the scope of the invention.

[0043]

Effects of the Invention As explained above, the present invention maintains a high dust collection function while keeping the basic configuration of the dust collection collector part as is, and also makes it possible to trap dust using the entire conductive layer, thereby reducing the amount of dust. By doubling the period for cleaning and removing
This has the effect of reducing work effort.

[Brief explanation of drawings]

FIG. 1 (A) and (B) show an embodiment of the present invention.
FIG. 3 is a diagram illustrating different electrical connections of an electric precipitator and dust collection action.

FIGS. 2A and 2B are diagrams illustrating electrical connections of different dust collector parts in the same embodiment.

FIG. 3 is a schematic front view of an air conditioner equipped with an electrostatic precipitator according to the same embodiment.

FIG. 4 is a schematic front view of the dust collector section of the same embodiment.

FIG. 5 is a diagram illustrating the electrical connection of an electrostatic precipitator and its operation in another embodiment.

FIG. 6 is a schematic front view of a conventional air conditioner equipped with an electrostatic precipitator.

FIG. 7 is a schematic vertical sectional view of the conventional electrostatic precipitator attached to the heat exchanger.

FIG. 8 is a diagram illustrating the electrical connection of the conventional electrostatic precipitator and its operation.

[Explanation of symbols]

13...Discharge electrode (ionization line), 14...Counter electrode plate, 11
... Ionization section, 19... Conductive layer, 12A, 12B... Dust collector section.

Claims (1)

[Claims] Claim 1: An ionization unit that charges dust particles contained in the air to be collected by ion discharge from a discharge electrode to a counter electrode plate, and a positive conductive layer and a negative conductive layer that are stacked and held at a predetermined interval. In an electric precipitator equipped with a dust collector section that conducts the air to be collected between these intervals and captures and collects charged dust particles using Coulomb force, the dust collector section is configured to connect the positive and negative points of the conductive layer. An electrostatic precipitator characterized by being able to switch polarity as necessary.