JPH03284363A - Air cleaner - Google Patents

Abstract

PURPOSE:To make electric charge dielectric on the surface of a dust collection filter by equipping an electrode part constituted of a high voltage electrode and a pair of counter electrodes, the dust collection filter and a high voltage impressing part. CONSTITUTION:When polluted air is passed through an electrode part 3, dust contained in the air is subjected to plasma charge with positive electric charge by discharge emitted from an acicular projection 5a. When the air contg. charged dust is passed through an earthed dust collection filter 6, dust is collected by this dust collection filter 6. Only the cleaned air is sent to the outside of a main body from a blowout port. Negative electric charge is made dielectric on the surface of the earthed dust collection filter 6. Dust is stuck on the surface of the dust collection filter 6 and electric potential is leaned to the positive side. The phenomena are prevented wherein potential difference of the charged dust is lowered and the collection capacity of the dust collection filter 6 is deteriorated. Thereby the collection efficiency is maintained for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air cleaner for purifying indoor air.

BACKGROUND OF THE INVENTION In recent years, as rooms become more airtight and air conditioning equipment becomes more widespread, air purifiers are often used to purify indoor air.

Conventionally, this type of air cleaner has a configuration as shown in FIGS. 4 to 6. That is, suction ports 102 for taking in contaminated air are opened on both sides of the main body 1010, and a pair of electrode portions 103 are arranged on the left and right sides for plasma-charging dust in the air sucked into the downstream side of the suction ports 102 with a high voltage of Φ. has been done. The electrode section 103 has a needle-like protrusion 104 applied with a high voltage in the upstream direction, and has a counter electrode plate 105 at an opposing position. A dust collection filter 106 for capturing charged dust is built in approximately the center of the main body 101, and a blower device 107 is built in the rear of the main body 101.
Furthermore, an outlet (not shown) is provided in the upper part of the main body 101 to discharge purified air into the room. When the air sucked in from the suction ports 102 on both sides of the main body 101 passes between the electrode parts 1030, the needle-like protrusions 104
The dust was plasma-charged, and the dust was captured by the grounded dust filter 106 by Coulomb force.

Problems to be Solved by the Invention In such a conventional configuration, when the operation continues for a long time, e charge is gradually accumulated in the dust collecting filter 106 due to the influence of the dust captured on the surface of the dust collecting filter 106, and e becomes The potential difference between the charged dust and the dust collection filter 106 decreases,
The problem was that the dust collection efficiency decreased.

The present invention solves the above-mentioned conventional problems, and aims to provide an air purifier that can maintain a potential difference with dust by dielectrically e-charges on the surface of a dust collection filter and maintain collection efficiency for a long period of time. It is something.

Means for Solving the Problems In order to solve the above problems, the present invention provides an electrode section consisting of a high voltage electrode to which a high voltage is applied and a pair of opposing electrodes facing the high voltage electrode, and an electrode section on the downstream side of this electrode section. , a ground-connected dust collection filter disposed in a ventilation path orthogonal to the ventilation direction of the electrode part, and the high-voltage electrode has a plurality of needle-like protrusions protruding in the upstream direction of the air flow and a dust collection filter in the downstream direction of the air flow. It has a configuration in which it is provided with a plurality of high voltage application parts protruding from the top, and these high voltage application parts are extended so as to face the dust collection filter.

Effect: With this configuration, the high voltage applying section, which is positively charged with a high voltage, is located in front of the dust collection filter, so that the dielectric effect of static electricity works, and θ charges are dielectrically generated on the surface of the dust collection filter.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 to 3. As shown in the figure, suction ports 2 are opened on both sides of the main body 1 to take in contaminated air, and electrode portions 3 charge the dust in the air sucked into plasma on the downstream side of the suction ports 2.
are arranged in pairs on the left and right parallel to the airflow. The electrode section 3 has a high voltage electrode 5 disposed at the center of a pair of parallel opposing electrode plates 4, and the high voltage electrode 5 has a needle-like protrusion 5a with an acute-angled tip protruding in the upstream direction of the air flow, and a high voltage electrode 5 is provided in the downstream direction. The application section 5b is protruded.

Furthermore, a ground-connected dust filter 6 is removably attached to the center of the main body 1, a blower device 7 is built in the rear of the main body 1, and purified air is supplied to the upper part of the main body 1. An air outlet 8 (not shown) is provided for discharging air into the room.

Further, the high voltage application section 5b is arranged to extend in front of the ground-connected dust collecting filter 6 and facing the dust collecting filter 6.

In the above configuration, when the contaminated air sucked in from the suction ports on both sides of the main body 1 passes through the electrode section 3, the dust particles in the air are charged with plasma due to discharge from the needle-like protrusions 5a. Ru.

When this charged dust-containing air passes through the grounded dust filter 6, it is mainly collected by the Coulomb force, and only the purified air is released from the air outlet 8. It is sent out of the main body. and high voltage electrode 5
Since the high voltage applying section 5b is placed in front of the dust collecting filter 6 to which a high voltage is applied, e-charges are induced on the grounded surface of the dust collecting filter 6. Therefore, a phenomenon in which a large amount of dust adheres to the surface of the dust collection filter 6 and the potential is biased toward the e side, reducing the potential difference with the charged dust and reducing the collection ability of the dust collection filter 6, can be prevented. It is possible to prevent this and maintain the collection efficiency for a long period of time.

As described above, according to this embodiment, by arranging the high-voltage application part of the high-voltage electrode in front of the ground-connected dust collection filter, O charge is induced in the dust collection filter, reducing the collection efficiency. (Can be used stably for a long period of time.)

Effects of the Invention According to the present invention, normally, when air passes between the electrode parts, dust in the air is plasma-charged to e by the needle-like protrusion of the high-voltage electrode, and this dust is initially grounded. However, as the dust collection progresses, charge gradually accumulates on the surface of the dust collection filter, reducing the collection efficiency. By placing it on the front of the filter and inducing an EX charge on the surface of the dust collecting filter, the electric potential on the surface of the dust collecting filter can be maintained and dust can be captured for a long period of time without reducing the collection efficiency. This results in an excellent air purifier.

[Brief explanation of drawings]

Figure 1 is a sectional view of an air cleaner according to an embodiment of the present invention, Figure 2 is a sectional view of an air cleaner according to an embodiment of the present invention.
The figure is a perspective view of the main parts, FIG. 3 is a sectional view of the main parts showing the discharge state of the needle-like protrusions, FIG. 4 is a sectional view of the conventional air cleaner, and FIG. 5 is a perspective view of the main parts. FIG. 6 is a side view of the main part showing the discharge state of the needle-like protrusion. 3... Electrode part, 4... Opposing electrode plate, 5...
...High voltage electrode, 5a... Needle-shaped projection, 5b
...High pressure application section, 6...Dust collection filter.

Claims (1)

[Claims] An electrode part consisting of a high voltage electrode to which a high voltage is applied and a pair of counter electrodes facing the high voltage electrode, and an earth connection arranged in a ventilation path perpendicular to the ventilation direction of the electrode part on the downstream side of this electrode part. the high-voltage electrode has a plurality of needle-shaped protrusions projecting in the upstream direction of the air flow and a plurality of high-voltage applying sections protruding in the downstream direction of the air flow, and the high-voltage electrode is connected to the dust collecting filter. An air purifier that extends to face the filter.