JPH03154659A - Air cleaner - Google Patents

Abstract

PURPOSE:To prevent spark discharge or ignition from taking place even when dust has been deposited on a wire net electrode by applying an insulating coating to the wire net electrodes provided on opposite sides of a dust collecting filter. CONSTITUTION:A dust collecting filter 2 that allows air sucked into a box 1 to pass therethrough is housed in the box 1. Wire net electrodes 3 are provided on opposite sides of the filter 2. And, DC high voltage is applied to the electrodes 3 by means of a high voltage electric power source 4. An insulating coating is applied to the electrodes 3. As a result, even when dust containing electroconductive substances is deposited on the electrodes, clearance for discharge does not change, thereby spark discharge or ignition is prevented from taking place.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air cleaner in which electrodes for applying a direct current high voltage are arranged on both sides of a dust collecting filter.

[Prior Art] Figs. 5 and 6 are diagrams showing a conventional air cleaner similar to that shown in, for example, Utility Model Application No. 62-79552, in which Fig. 5 is a longitudinal sectional view, and Fig. 6 is a longitudinal sectional view. The figure is an enlarged side view of the dust collecting filter portion.

In the figure, (1) is a box body with an inlet (1a) and an outlet (1b).
)have. (2) is a dust collection filter housed in the box (1) and placed facing the suction port (1a), (3) is a wire mesh electrode provided on both sides of the dust collection filter (2), (4)
is a DC high voltage power supply connected between wire mesh electrodes (3), (5
) is the blower driven by the motor (6), and (7) is the airflow generated by the blower (5).

Conventional air purifiers are implanted as described above and wire mesh electrodes (
When a high voltage is applied to 3), a strong electric field is generated, and this electric field dielectrically polarizes the fibers of the dust collection filter (2). On the other hand, when the blower (5) rotates, indoor air flows through the suction port (l
a) into the box body (1) and filtered into the dust collection filter (2).
), an air flow (7) is generated which is discharged into the room from the discharge port (1b). When the dust particles contained in this air flow (7) pass through the dust collection filter (2), the dielectric polarization force of the dust collection filter (2) acts on the dust particles, causing the dust particles to pass through the dust collection filter (2).
is collected by.

[Problem to be solved by the invention] In the air purifier configured as described above, wire mesh electrodes (3
), so if the air flow (7) contains conductive substances or flammable substances, these dusts will accumulate on the wire mesh electrode (3), causing the wire mesh electrode (3) to (3) The distance between them becomes shorter, and in the worst case, the wire mesh electrode (3) (3)
There is a problem in that there is a risk of spark discharge and ignition of dust.

This invention was made in order to solve the above problems, and an object thereof is to provide an air purifier that can prevent spark discharge or ignition even if dust accumulates on the wire mesh electrode. shall be.

[Means for Solving the Problems] An air cleaner according to the present invention has wire mesh electrodes provided on both sides of a dust collecting filter coated with insulation.

Further, in an air purifier according to another aspect of the present invention, a plurality of dust collecting filters are arranged facing each other with a gap in between, a first wire mesh electrode is placed in the gap, and a second wire mesh electrode is placed on the outside of each of the dust collecting filters.
A wire mesh electrode is provided, and the first or second wire mesh electrode is coated with insulation.

[Function] In this invention, since the wire mesh electrode is insulated, the discharge gap does not change even if dust containing a conductive substance accumulates on the wire mesh electrode.

In another aspect of the present invention, a plurality of dust collection filters are arranged facing each other with a gap in between, and first and second wire mesh electrodes are provided in the gap and on the outside of each of the filters, and the first or second wire mesh electrode Due to insulation coating.

Assuming the collection efficiency is the same, the voltage applied to one dust collection filter can be lower than when the dust collection filter is configured with one dust collection filter.

[Example] Figures 1 to 3 are diagrams showing an example of the present invention.
The figure is an enlarged side view of the dust collection filter part, Fig. 2 is a partially enlarged front view of the wire mesh electrode, and Fig. 3 is an enlarged cross-sectional view of the ■-■ gland in Fig. 2. Similar parts to the conventional device have the same reference numerals. Indicated by Note that FIG. 5 is also used in this embodiment.

In the figure, (3) is a wire mesh electrode, and the metal wires (3) intersect vertically and horizontally.
a), the surface of which is coated with an insulating coating (3b).

In the air cleaner configured as above.

Even if the airflow (7) passing through the dust collection filter (2) contains conductive substances and deposits them on the wire mesh electrodes (3), the air flow (7) that passes through the dust collection filter (2) may contain conductive substances that are deposited on the metal wires (3a) of the wire mesh electrodes (3) facing each other. Since the distance, ie, the discharge gap, is not shortened, no spark discharge occurs. Therefore, even if the air flow (7) contains flammable substances, there is no risk of ignition.

FIG. 4 is an enlarged longitudinal sectional view showing another embodiment of the present invention, in which two dust collecting filters (2A) (2A) are arranged facing each other with a gap in between, and a first wire mesh is inserted into the gap. Electrode (3A
), the second wire mesh electrode (3B) is provided on the outside of the dust collection filter (2A) (2A), and the first and second wire mesh 1t
T! (3A) (3o) Similar to Niha No. 31, insulation covering 1 (3b
) has been applied. Moreover, the positive electrode of the high voltage power supply (4) is connected to the first wire mesh electrode (3A), and the negative electrode is similarly connected to the second wire mesh electrode (3B).

In this example, since the dust collection filters (2 persons) are composed of two pieces, compared to the one in Fig. 1, if the collection efficiency is the same, the voltage will be applied to one dust collection filter (2A). The voltage may be about 172, which is safe.

Note that the function of preventing discharge gap shortening is the same as that in FIG. 1.

In the embodiment of FIG. 4, the first and second wire mesh electrodes (3A)
Although #@edge coating 3b) is applied to (3B), it is sufficiently useful even if it is applied to either one of them.

[Effects of the Invention] As explained above, in this invention, the wire mesh electrodes provided on both sides of the filter are insulated, so even if dust containing conductive substances accumulates on the gold 11 electrode, the discharge gap will not change. This has the effect of preventing spark discharge and the risk of ignition.

Further, in another invention of the present invention, a plurality of dust collection filters are arranged facing each other with a gap in between, first and second wire mesh electrodes are provided in the gap and on the outside of each, and the first or second wire mesh electrode is insulated. Since it is coated, if the collection efficiency is the same, the voltage applied to one dust collection filter can be lowered, which has the effect of increasing safety.

[Brief explanation of the drawing]

1 to 3 are diagrams showing an embodiment of the air cleaner according to the present invention, and FIG. 1 is an enlarged side view of the dust collecting filter portion;
FIG. 2 is a partially enlarged front view of the wire mesh electrode in FIG. 1, FIG. 3 is an enlarged cross-sectional view taken along the line ■-■ in FIG. 2, and FIG. 4 is a diagram showing an embodiment of another invention of the present invention. Figure 5 is an enlarged side view of the dust collection filter part, Figure 5 is a vertical cross-sectional view showing a conventional air purifier, and Figure 6 is a vertical cross-sectional view of a conventional air purifier.
The figure is an enlarged side view of the part of the dust collecting filter shown in FIG. In the figure, (1) is a box, (2) (2A) is a dust collection filter,
(3) is a wire mesh electrode, (3A) is the first wire mesh electrode, (3
B) is the second wire mesh electrode, (3b) is the insulation coating, (4) is the DC high voltage power supply, (5) is the blower, and (7) is the air flow. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[Claims] (1) A dust collection filter that is housed in a box and allows the air sucked into the box to pass through, a wire mesh electrode provided on both sides of this dust collection filter, and a high voltage power supply that applies a DC high voltage to the wire mesh electrode. An air purifier comprising: and an insulating coating on the wire mesh electrode. (2) a plurality of dust collecting filters arranged facing each other across a gap in a box body and allowing air sucked into the box body to pass; a first wire mesh electrode provided in a gap between the dust collecting filters; A second wire mesh electrode provided on the outside of each of the dust filters, and a high voltage power source for applying a DC high voltage, the positive electrode of which is connected to the first wire mesh electrode and the negative electrode of which is connected to the second wire mesh electrode, Or an air purifier in which the second wire mesh electrode is insulated.