JPH047048A - Air cleaner - Google Patents

Abstract

PURPOSE:To avoid spark discharge from being caused between the electrodes by equipping a high-voltage power source by which DC high voltage is impressed between the lead wire electrodes and also performing insulated coating for the positive pole side. CONSTITUTION:When DC high voltage is impressed between the lead wire electrodes 8, 9 by a DC high-voltage power source 7, an intensive electric field is generated. Fiber of a dust collection filter 6 is dielectrically polarized by this electric field. Air is sucked from a suction port 1 by rotation of a fan 5 and passed through the dielectrically polarized filter 6 and blown out from a discharge port 2. When dust particles contained in the air sucked from the suction port 1 are passed through the dust collection filter 6, dielectric polarization force of the filter 6 acts thereon and dust particles are collected on the filter 6. Even when dust of conductive substance is contained in the air to be treated, the dielectric strength of the insulated coating 12 is large and spark discharge is not caused. Thereby safety is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air cleaner that cleans treated air by dielectrically polarizing a dust collection filter using a strong electric field.

[Prior Art] Fig. 5 and Fig. 6 are a vertical cross section and a partially enlarged side view showing a conventional air purifier of the same type as the air purifier shown in, for example, Japanese Utility Model Application No. 62-79552. . That is, suction port 1
A blower 5 is installed in a box 4 in which a ventilation passage 3 having a discharge port 2 and a ventilation passage 3 are formed, and an air flow from the suction port 1 toward the discharge port 2 is formed. A dust collection filter 6 is arranged in the ventilation path 3 between the suction port 1 and the blower 5 so as to face the suction port 1 . Wire mesh electrodes 20 are provided on both sides of the dust collecting filter 6, and a DC high voltage is applied between the wire mesh electrodes 20 by a DC high voltage power source 7.

In the air cleaner having the above configuration, when a high DC voltage is applied to the wire mesh pole 20, a strong electric field is generated, and the fibers of the dust collection filter 6 are dielectrically polarized by this electric field. Air sucked in from the suction port 1 by the rotation of the blower 815 passes through the dielectrically polarized dust filter 6 and is blown out from the discharge port 2. When the dust particles contained in the air sucked in from the suction port 1 pass through the dust collection filter 6, the dielectric polarization force of the dust collection filter 6 acts on them.
will be collected.

[Problem to be solved by the invention] In the conventional air cleaner described above, since the airflow passes through the wire mesh electrode 20, if the airflow contains dust of conductive substances or combustible substances, these dust on the wire mesh electrode 2
0, the distance between the wire mesh electrodes 20 becomes shorter, and in the worst case, a spark discharge occurs between the wire mesh electrodes 20, which may lead to ignition of the combustible material dust.

This invention was made in order to solve such conventional problems, and provides a highly safe air purifier that can avoid spark discharge between electrodes even if dust accumulates on the electrodes and dust collection filter. With the goal.

[Means for Solving the Problems] The air cleaner according to the present invention has an insulating coating on at least the positive electrode side so that the dust collecting filter is sandwiched between both sides of the dust collecting filter interposed in the ventilation path through which the treated air passes. A high voltage DC voltage is applied between the lead wire electrodes by a high voltage power source.

Further, another air cleaner according to the present invention has a positive lead wire electrode having an insulating coating disposed in a gap between a plurality of dust collecting filters arranged facing each other at intervals in a ventilation path through which treated air passes, and Negative lead wire electrodes are provided before and after the dust collection filter, facing the lead wire electrode, and a high voltage DC voltage is applied between the positive lead wire electrode and the negative lead wire electrode by a high voltage power source.

[Operations] In the air purifier of this invention, the electrodes are not wire meshes but lead wires, so the accumulation of dust on the electrodes is slowed down, and at least the positive electrode side of the lead wire electrodes is coated with insulation and has a high dielectric strength. Therefore, even if dust such as conductive material accumulates on the dust filter or the lead wire electrode, spark discharge will not occur.

Further, in another air cleaner of the present invention, if the replenishment efficiency is the same, the voltage applied to the dust collection filter plate can be lowered, so that spark discharge can be avoided.

[Example] Fig. 1 is a front view of a dust collecting part showing one embodiment of an air purifier according to the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is a sectional view of an electrode, and Fig. 4 is a front view of a dust collecting part showing an embodiment of an air purifier according to the present invention. FIG. 3 is a sectional view of a dust collection portion showing an example of the invention. First, the air purifier of the embodiment shown in FIGS. 1 to 3 will be explained. This air purifier is basically the same as the conventional one described above, except for the structure of the part that performs the dust collection function. They have the same configuration. Therefore, the configuration of the ventilation passage through which the processed air passes and the configuration of the blower are based on FIG. 5 and will be referred to here. That is, the dust collection part includes a dust collection filter 6 interposed in the ventilation passage 3, and eight Riet wire electrodes arranged in a meandering manner on both sides of the dust collection filter 6 so as to sandwich the dust collection filter 6 therebetween. , and a DC high voltage power supply 7 that applies a DC high voltage between these Riet wire electrodes 8 and 9. The dust collection filter 6 and eight lead wire electrodes are held in a filter frame 10,
The filter frame 10 is installed in a manner that crosses the ventilation path 3. Each lead wire electrode 8.9 has an insulating structure in which a conductor portion 11 is coated with an insulating coating 12 having a high dielectric strength, as shown in FIG.

In the air cleaner configured as described above, when a DC high voltage is applied to the lead wire electrodes 8.9 by the DC high voltage power supply 7, a strong electric field is generated, and the fibers of the dust collection filter 6 are dielectrically polarized by this electric field. Air sucked in from the suction port 1 by the rotation of the blower 5 passes through the dielectrically polarized dust filter 6 and is blown out from the discharge port 2. When the dust particles contained in the air sucked in from the suction port 1 pass through the dust collecting filter 6, the dielectric polarization force of the dust collecting filter 6 acts on the dust particles, so that the dust particles are collected by the dust collecting filter 6. Even if the treated air contains conductive dust and it accumulates on the dust collection filter 6 or the lead wire electrode 8.9, the lead wire electrode 8.
, 9 has a high dielectric strength voltage, spark discharge does not occur, and even if combustible dust is deposited, there is no possibility of ignition, so it is safe.

In the embodiment shown in FIG. 4, a positive lead wire electrode 8 has an insulating coating 12 in the gap between a plurality of dust collecting filters 6a and 6b arranged facing the suction port 1 of the ventilation path 3 through which the processed air passes. are arranged, and front and rear negative lead wire electrodes 9a and 9b having insulation coatings 12 sandwiching the dust collection filters 6a and 6b are provided opposite to the positive lead wire electrode 8, and the positive lead wire electrode 8 and the negative lead wire electrode The structure is such that a DC high voltage power supply 7 applies a DC high voltage between 9a and 9b. positive lead electrode 8 and negative lead wire electrode 9a,
The structure of 9b is the same as that of the previous example.

In this embodiment, if the collection efficiency is kept the same, the voltage applied to the dust collecting filters 6a and 6b can be lowered, making it possible to avoid spark discharge as well as safety.

Note that the insulating coating 12 will work effectively if applied to at least the positive electrode, and does not necessarily need to be applied to both electrodes.

[Effects of the Invention] As is clear from the description of the embodiments, according to the air purifier of the present invention, since the electrodes are lead wires instead of wire mesh, the accumulation of dust on the electrodes is slowed down, and furthermore, the lead wires The electrodes are coated with insulation and have a high dielectric strength, so even if dust from conductive materials accumulates on the dust collection filter or lead wire electrodes, spark discharge will not occur, and dust from flammable materials will not accumulate. There is no risk of ignition, which improves safety.

Further, according to another air cleaner of the present invention, if the collection efficiency is the same, the voltage applied to the dust collecting filter sheet is lower, which is not only safe but also avoids spark discharge.

[Brief explanation of drawings]

Fig. 1 is a front view of essential parts showing one embodiment of the air purifier according to the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is a sectional view of the electrode, and Fig. 4 is another embodiment. FIGS. 5 and 6 are a longitudinal sectional view and a partially enlarged side view of a conventional air cleaner. In the figure, 3 is a ventilation path;
6. 6a and 6b are dust collection filters, 7 is a DC high voltage power supply,
8 is a lead wire electrode (positive lead wire electrode), 9 is a lead wire electrode, 9a and 9b are negative lead wire electrodes, and 12 is an insulating coating. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa (and 2 others)

Claims (2)

[Claims] (1). A dust collection filter interposed in the ventilation path through which the treated air passes, lead wire electrodes arranged on both sides of the dust collection filter so as to sandwich the dust collection filter, and a high voltage filter for applying a DC high voltage between the lead wire electrodes. An air purifier comprising a voltage power supply and an insulating coating applied to at least the positive electrode side of the lead wire electrode. (2). a plurality of dust collecting filters arranged facing each other at intervals in a ventilation path through which treated air passes, a positive lead wire electrode having an insulating coating disposed in the gap between the dust collecting filters, facing the positive lead wire electrode, An air purifier characterized by comprising a positive lead wire electrode and a negative lead wire electrode before and after a dust collection filter, and a high voltage power supply that applies a DC high voltage between the positive lead wire electrode and the negative lead wire electrode. Machine.