JPS59123544A - Air cleaning device - Google Patents

Abstract

PURPOSE:To generate electrically air flow and to enable removal of impurity articles and polluting particles in the stage of flow by determining the impressed voltage value and gap length between a counter panel electrode and a dust precipitation panel electrode at prescribed values. CONSTITUTION:A titled device consists of dust precipitation panel electrodes 8 and counter panel electrodes 9 which are alternately disposed to face each other with a gap in a casing 1 provided with an inlet side mask 2 and an outlet side mask 3 serving as an inlet and outlet for air flow and ionizing wires 16 installed on the extension line of the electrodes 9 apart by a required distance from the electrodes 8 at the position on the outside of said gap. A voltage at which the electrode 9 and the wire 16 have the same polarity with respect to the electrode 8 is impressed between the electrodes 8, 9 and the wire 16, and air flow is generated by the voltage between the wire 16 and the electrode 8. A required potential gradient is generated between the electrodes 8 and 9. The impressed voltage between the electrodes 9 and 8 is made half as compared with the impressed voltage between the above-mentioned wire 16 and the electrode 8 and an ozone decomposing filter made of activated carbon is disposed in the outlet for the air flow.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air purification device that generates air flow without mechanical parts and removes impurity particles, contaminant particles, etc. contained in the air during the flow process.

As a conventional air purification device, for example, the Japanese Patent Publication No. 54-231
There are some such as those disclosed in No. 47. This air purification device consists of a plurality of aluminum dust collection electrodes and corresponding electrodes, which are arranged opposite to each other with a gap length of about 10 cylinders, which serves as an air flow path. An ionization line is installed on the outside about 20 mm away from the tip edge of the dust electrode.

The ionization line and the corresponding electrode are set to polarity 1, the dust collection electrode is set to e polarity, and a voltage of about 15 KV is applied between them. By applying this voltage, a corona discharge is generated between the ionization wire and the dust collection electrode, generating an air flow from the ionization wire side to the gap side, and the fine particles in the air are charged with one ion, which is transferred to the dust collection electrode. In the process of being collected and further flowing through the gap, the electric field formed between the dust collection electrode and the corresponding electrode charges the fine particles, and the particles that would otherwise have been collected are also collected on the dust collection electrode.

However, in conventional air purification devices such as this one, the gap length between the dust collection electrode and the corresponding electrode was about 10 mm, so dust could not be collected sufficiently and the annual production efficiency was insufficient for practical use. There was a problem. Furthermore, since no countermeasures were taken against the ozone generated during corona discharge, the amount of ozone leaked outside the equipment was 200 pp.
There was a problem in that the amount exceeded 501) ppb, which is stipulated by law at around 501b, and could cause damage to the human body.

This invention was made by focusing on such conventional problems, and the voltage applied between the corresponding panel electrode and the dust collection panel electrode is approximately 2 times the voltage applied between the ionization line and the dust collection panel electrode. As a value of 1, the length of each gap between the corresponding panel electrode and the dust collection panel electrode is narrowed to the required potential gradient according to the applied voltage value, and an activated carbon ozone decomposition filter is installed at the air flow outlet. The aim is to solve the above problems by providing a

The present invention will be explained below based on the drawings. Figures 1 to 5
The figure shows an embodiment of the invention.

First, to explain the structure, the symbol (1) in these figures is a casing, and the left and right sides of the casing (1), which are the inlet and outlet of the air flow, are masked.
An entrance side mask (2) and an exit side mask (3) equipped with (2a) and (3a) are each detachably attached. A stand (4) is attached to the lower part of the casing (1), and a handle (5) is attached to the upper part, so that the illustrated example is constructed as a portable type that can be installed at any position.

Each functional unit having an ionization function, a dust collection function, and an ozone decomposition function is installed inside the casing (1). That is, the casing (1
) A unit storage frame (6) is fixedly installed approximately in the center, and a dust collection unit frame (7) is removably installed therein. And this dust collection unit frame (with multiple dust collection panel electrodes (8)... and corresponding panel electrodes (9)
As an example of the air flow path, the air passages are alternately arranged opposite to each other with a required gap α0) of 5 mm %'JA degree. Both panel electrodes (8) and (9) are fabricated using, for example, a brass plate as a base material, which is coated with a silver plating layer for promoting ozone decomposition. Note that noble metals other than silver, such as gold and platinum, may also be used as the metal for promoting the ozone content Nl. Each corresponding panel electrode (9) is formed to have a narrower width than each dust collecting panel electrode (8), and the tip R (9a) of each corresponding panel electrode (9) )
It is arranged inside the gap by an appropriate distance [t] from the line connecting the tip edges (8a) of the. The inner surface near the rear edge of the dust collection/unit frame (7) (when "front" and "rear" are used in this specification, the airflow inlet side is referred to as "front" and the outlet side is referred to as "rear") is shown in Figure 4. As shown in the figure, there is a pair of upper and lower terminal plates α1) az
are pasted, dust collection panel electrodes (8)... are commonly connected to the upper terminal board 01), and corresponding panel electrodes (9)... are connected to the lower terminal board α. Commonly connected.

(12a) is the insertion part, (12b) is the terminal receiving plate, (2)
Although not shown, the other terminal plate α■) is also provided with a similar insertion part and terminal receiving plate, and the dust collection panel electrode (8)...and the corresponding panel electrode (9)・
. . . are connected to a power source E as described later through their respective insertion portions and terminal receiving plates. Dust collection unit frame (7)
The outer periphery of the four-sided metal body is tapered as shown in Fig. 3, etc., and the inner surface of the unit storage frame (6) is also tapered to correspond to this, and the dust collection unit frame (7) is It can be inserted into and removed from the unit storage frame (6) from the rear side. 0■ (13) is a Nailatch (push-in stopper), and the dust collection unit frame (7) is in the insertion position with this Nailatch o3) Q
■It is locked and fixed. And this dust collection unit frame (
The dust collection panel electrodes (8) and the corresponding panel electrodes (9) can be attached to and detached from the casing (1) as one body.

The front side of the unit storage frame (6) is still slightly expanded,
The metal ionization unit frame αa is fitted into the expanded part of the
It is rare. 0 is an ionization unit holding frame, and the ionization unit frame α is locked and fixed in the fitting position with this holding frame (I9).An ionization line αe... is installed between the upper and lower crosspieces of the ionization unit frame. 7. The ionization line α0 is formed of a tungsten wire with a thickness of about 1 mil, for example, and is plated with a noble metal such as gold as described above.Each ionization line (lω... A coil spring (I'O...) is interposed in the lower part and elastically tensioned. Each coil spring (17)
The end of the hole (
14a)... is stopped, and each ionization line 06
)... are locked and fixed to the ionization unit frame 04) with screws (14b).... According to this construction mode, the ionization line αQ is an example of a line connecting the front edge (8a) of each dust collection panel electrode (8) on the forward extension line from each corresponding electrode (9). as 20Trrr
It is specified at a position separated by a required distance of about n. By the way, it is easy to specify the position of the button by elastically tensioning the coil spring round. 1. Each ionization line αQ
. . are connected to a power source E as described later by conductive wires (not shown) led out from the ionization unit frame 04).

Furthermore, between the vicinity of the upper and lower ends of the ionization wires (161...) and the dust collection panel electrodes (8)... and the corresponding panel electrodes (9)..., as an example of ozone generation prevention, plastic The shielding plates (18a) (18b) are Pf
It is erected at the required height.

On the other hand, filter frame attachment parts α9 are protruded from the four rear corners of the unit storage frame (6), and an ozone decomposition filter (2α) is fitted onto these.Ozone decomposition filter (20) is made of activated carbon, and has a mesh size of about 12 cm2 to enhance its ozone decomposition function.

Figure 5 shows how the dust collection panel electrode (8)... and the corresponding panel electrode (9)... are connected to the power supply E. (21) and held at e polarity. On the other hand, ionization line (
16) ... and the corresponding panel electrode (9) ... have the ■ polarity, and the ionization wire (I6) ... is connected to the ■ terminal (22a) via the resistor R for adjusting the discharge current, respectively, and the corresponding panel electrode (9) ... has the ■ polarity. The panel electrode (9)... is the intermediate terminal (2) which is the % voltage point.
2b). ■The voltage value of the terminal (22a) is 15 KV as an example, and according to this connection mode, the ionization line aO... is connected to the dust collection panel electrode (8)...
A voltage of 15KV is applied, and the corresponding panel electrode (9)
7.5 KV, which is % of the voltage, is applied to . Therefore, the corresponding panel electrode (9) and dust collection panel electrode (8)
The gap length between them is set to about 5 cylinders as described above in order to set the required potential gradient to 1.5 KV/in corresponding to the applied voltage value of %.

03) in Figures 1 and 3 is the power switch, o, l)
is the power cord, PL is the pilot lamp, (251
(26) is a safety limit switch, (25a) (
26a) is the limit switch collection fee. The limit switch (2!19 (,!G) consists of a normally closed contact and is connected in series with the power switch (23) K. When the input side mask (2) or the outlet side mask (3) is removed. This prevents the danger of turning off and touching the high voltage.

Next, I will explain the function.

Install the air purification device at the required location indoors, etc. When the power switch (c) is turned on, the dust collection panel electrode (8)
)... as ○ polarity, this dust collection panel electrode (8)
15K between ... and ionized In (16)...
V, dust collection panel electrode (8)... and corresponding panel electrode (9)
)... 7.5 KV is applied between them.

Corona radiation 1E is generated between each ionization line α0 and the dust collection panel electrode (8) at an applied voltage of 15 KV. This corona discharge releases a large amount of ions to the dust collection panel electrode (8
)... When moving toward the gap 00), the kinetic energy is imparted to the neutral gas molecules to generate a type of airflow, and an airflow toward the gap 00) is generated at a required flow velocity of about 60X.

At the same time, impurity particles in the air are charged to one ion and collected on the dust collection panel electrodes (8).

On the other hand, the dust collection panel electrode (8) corresponds to the corresponding panel electrode +EJ, (
9) and the voltage is 7.5 through the gap <1 (1).
Since KV is applied, this electric field causes the above-mentioned corona jI! of the impurity particles in the air! ! , the remainder that was not collected by electrolysis was also used as panel electrode (8) produced in 2007...
It is attracted to the top and collected. In the present invention, the length N(10) is formed to have a narrow width of 5 degrees of normal phase, so that the collecting action is extremely effective. The table below shows an example of measuring the collection efficiency.

Incidentally, the dust collection efficiency of conventional devices is around 50%.

Further, a large amount of ozone is generated during the above-mentioned corona discharge due to the high electric field. However, as this ozone flows through the mass gap (10), it comes into contact with the silver plating layer applied to the dust collection panel electrode (8) and the corresponding panel electrode (9), and breaks down into oxygen molecules. be touched. Further, in the process of flowing out from the outlet side, the ozone comes into contact with the activated carbon ozone decomposition filter CC and is decomposed. Since this ozone decomposer filter wire has a required mesh size of 12 cells/1 inch square, the flowing ozone effectively contacts the activated carbon surface and decomposition progresses, and the required amount is such that it does not cause any harm to the human body. reduced to the value.

The degree of ozone decomposition of the activated carbon ozone decomposition filter (20) depends on the amount of ozone flowing into it, but it decomposes about 25 to 40% of the ozone. The ozone decomposition filter (20) becomes inactive as it is used, so it needs to be replaced in a timely manner, but the ozone decomposition filter (20) in this invention is made of activated carbon itself, so its life is limited. It will be maintained for more than one year.

- Since the electric field is concentrated near the end of the ionization line αQ, the amount of ozone generated in this part tends to be larger than in other parts. However, this part has a shielding plate (1
8a) (18b) is erected, corona discharge is prevented and ozone generation is suppressed.

In this way, in this invention, the shielding plates (18a) (18b)
, the precious metal plating layer applied to both panel electrodes (8) (9), and the ozone decomposition filter (2o) work together to suppress ozone generation or effectively decompose it, preventing ozone generation (outflow) from the equipment. ) is significantly reduced to below the legal limit of about 20 ppb or less.

Further, as the use progresses, airborne dust such as impurity particles adheres to the ionization wire aO, and the flakes extend in the form of needles toward the dust collection panel electrode (8). And such an ionization line (10
If the ionized line (10) and the dust collection panel electrode (8) change in the electric field, the ionized line may become 0.
At 0..., self-excited vibration noise tends to occur.

However, each ionization 11Q6)... has a coil spring o'? ) are interposed and elastically constructed, so that they act to alleviate self-excited vibrations and reduce noise generation.

Furthermore, impurity particles in the air are deposited on the p dust collection panel electrode (8) etc. due to the effective dust collection action as described above. Therefore, it becomes necessary to clean the dust collection panel electrode (8) and the like. At this time, connect the dust collection panel electrode (8) and the corresponding panel electrode (9) to the dust collection unit frame (with the casing (1)
Remove and clean.

As detailed above, according to the present invention, the voltage value applied between the corresponding panel electrode and the dust collection panel electrode is set to approximately half the value of the voltage applied between the ionization line and the dust collection panel electrode. The gap length between the electrode and the dust collection panel electrode is set to a narrow gap length that provides the required potential gradient according to the applied voltage value, and an activated carbon ozone decomposition filter is installed at the air flow outlet. Therefore, the effect of improving the dust collection efficiency and reducing the amount of ozone outflow to a sufficient degree for practical purposes can be obtained.

- In addition to the above-mentioned common effects, each of the embodiments also provides the following effects.

According to an embodiment in which the dust collection panel electrode and the corresponding panel electrode are provided with a precious metal metal layer for promoting ozone decomposition, the amount of ozone outflow can be further reduced.

According to an embodiment in which a shielding plate for preventing ozone generation is provided upright between the vicinity of the installed end of the ionizing wire and the dust collection panel electrode and the corresponding panel electrode, the amount of ozone generation (outflow) can be further reduced.

According to an embodiment in which a spring is interposed between each ionization wire and the casing side to elastically install each ionization wire, the installation position of the ionization wire can be easily specified, and
The generation of self-excited vibration noise can be reduced.

According to the embodiment in which the dust collection panel electrode and the corresponding panel electrode are detachably attached to the casing, cleaning of the dust collection D honeycomb electrode, etc. becomes easy.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the air purifying device according to the present invention, in which FIG. 1 is a partially cutaway front view, FIG. 2 is a partially cutaway plan view, and FIG. 3 is a partially cutaway plan view. The side view, M4 is a partially cutaway rear view, and FIG. 5 is a wiring diagram showing the connection relationship between the ionization wire, the dust collection panel electrode, etc., and the power source. 1: Casing 2: Inlet side mask 3: Outlet side mask 6: Unit storage frame 7: Dust collection unit frame
8: Passenger panel electrode 9: Corresponding panel electrode 1o: Gap 14: Ionization unit frame 16: Ionization wire 17: Coil sprink 18
at 18b: Blocking i & 20 Niosin decomposition filter 21: E terminal 22a: ■Terminal 22b two intermediate terminals E; Power supply Japan Electric Co., Ltd. Rei Kawashima Three agents Ashi 1) Mamoru Nao

Claims (1)

[Claims] 1. A plurality of dust collection panel electrodes and corresponding panel electrodes are alternately arranged facing each other with a required gap to form an air flow path in a casing provided with an air flow inlet and an outlet. , An ionization line is installed at a position outside the gap and approximately on an extension line from each of the corresponding electrodes at a required distance from the edge of the dust collection panel electrode, and connects the dust collection nozzle electrode and the corresponding panel electrode. Further, a voltage is applied between the dust collection panel electrode and the ionization wire so that the corresponding panel electrode and the ionization wire have the same polarity, and an air flow is generated by the voltage between the ionization wire and the dust collection nozzle electrode. In addition, in the air purifying device that generates a required potential gradient between each of the dust collection panel electrodes and the corresponding funnel electrode, the voltage applied between the ionization line and the dust collection panel electrode is determined by the voltage applied between the corresponding panel electrode and the dust collection panel electrode. The voltage value applied between the dust panel electrodes is set to approximately half the value, and the length of each gap between the corresponding panel electrode and the dust collection panel electrode is set to a gap that has a required potential gradient according to the applied voltage value. 1. An air purifying device characterized in that the air purifying device is set to a long length, and further includes an activated carbon membrane ozone decomposition filter disposed at the outlet of the air flow. 2. The dust collection panel electrode and the corresponding panel electrode are coated with a noble metal plating layer for promoting ozone decomposition.
Air purification device as described in section. 3. The air conditioner according to claim 1 or 2, wherein a shielding plate for preventing ozone generation is provided between the near end of the ionization wire and the dust collection panel electrode and the corresponding panel electrode. Purification device. 4. Air purification according to claim 1, 2 or 3, in which each ionization wire is elastically constructed with a spring interposed between each ionization wire and the casing side. Device. 5. The air purifying device according to any one of claims 1 to 4, wherein the dust collection panel electrode and the corresponding panel electrode are attached to a dust collection unit that is detachably attached to the casing.