JPS631465A - electrostatic air purifier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrostatic air cleaner used for home use, automobile use, clean room use, and the like.

BACKGROUND ART A conventional electrostatic air cleaner will be explained based on the drawings. In FIG. 2, 1 is an ionization electrode, a counter electrode 2 is placed opposite to this ionization electrode 1, and a high voltage generated by a high voltage power source 3 is applied to both electrodes 1 and 2 to form an ionization section. There is. The airflow flowing from the intake port 4 to the ventilation port 5 is generated by a fan 7 that is rotationally driven by a motor 6. A charged filter 8 made of a non-woven fabric made of charged fibers is provided on the downstream side of the airflow flowing through the ionization section, and as shown in an enlarged view in FIG. It's tangled. On the back side of the charged filter 8, there is provided a grounded breathable ground metal n9 made of a wire mesh, a punched iron plate, etc., and this charged filter 8 and the breathable ground metal n9 form a dust collecting section. 10
is a grounding plate, and this grounding plate lO acts as an electrostatic shield and for supporting the pre-filter 11. 12 is a case, and l3 is a lid of an opening 14 from which the air permeable ground metal basket 9 and the charged filter 8 are taken out.

The operation in this configuration will be explained. When the air purifier is operated, dust-containing air is sucked through the intake port 4, coarse dust is removed by the pre-filter 1l, and the ionizing electrode 1 and counter electrode 2
When the temperature reaches between 1 and 2, the minute dust particles are charged by the ion current. When charged dust flows into the charged filter 8, it receives electrostatic force from the local electric field within the charged filter 8, and is attached to the fiber surface and collected. At this time, the surface of the charged filter 8 on the ionized charge Vi1 side becomes high voltage due to the adhesion of charged dust. Due to this increase in potential, a high voltage is applied between the air permeable ground metal n9 at the rear of the 'ltF electrostatic filter 8 and the surface of the electrostatic filter 8, increasing the electric field and increasing the collection efficiency. In this way, dust is collected in the dust-containing air, and the clean air is sent out from the air outlet 5.

In order to increase the collection efficiency, the lower the speed at which it passes through the charged filter 8, the better. Therefore, it is better to make it bag-shaped as shown in Figure 2 or wave-shaped as shown in Figure 3, and the counter electrode is placed on the back side of the charged filter 8. A method has been used in which the grounding electrode 15 of the charged filter 8 is also used, and the ionizing electrode 1 is placed at an intermediate position between the peaks of the waves of the charged filter 8 on the side facing the intake port 4 of the charged filter 8. Ta. Problems to be Solved by the Invention However, with the conventional configuration, if the processing air volume is further increased, sufficient dust collection efficiency cannot be obtained because the dust collection area of the charged filter 8 is small and the air passing speed is high. There wasn't. The present invention solves the above problems and aims to provide an electrostatic air cleaner with improved dust collection efficiency. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a dust collection section disposed downstream of the airflow flowing through the ionization section consisting of an ionization electrode and a counter electrode, with a main filter and a ground electrode. A plurality of two-layer corrugated plates are arranged in a zigzag shape in a direction perpendicular to the inflow direction of the airflow flowing through the ionization part, with the main filter of the corrugated plates facing the ionization part. It is. Effect: With the above configuration, the incoming air is made into a vortex in the triangular portion formed by the crests and troughs of the waves formed by the main filter, making it easier to homogenize and diffuse charged dust, and also to prevent the dust from enlarging due to dust collisions. By promoting this, it is possible to improve dust collection efficiency and provide equipment that is small, lightweight, and inexpensive.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIG. 1, 21 is an ionization electrode, and a counter electrode 22 is placed opposite to this ionization electrode 21.
1. A high voltage generated by a high voltage power supply 23 is applied to 22 to form an ionization section. A fan 24 is connected to a motor 25 and driven to rotate, and generates an air flow flowing from an air intake port 26 to an air outlet 27. Reference numeral 28 denotes a charged main filter provided on the downstream side of the airflow flowing through the ionization section.A ground electrode 29 having air permeability and conductivity is provided on the back side of this charged main filter 28, and this IF main filter 28 and The ground electrode 29 forms a dust collection section. The charged main filter 28 and the ground electrode 29 are composed of two layers of corrugated plates and are held by a frame 30. The frame body 3 is arranged in a zigzag shape in a direction perpendicular to the inflow direction of the airflow.
The structure is such that the surface formed by the ridges of the charged main filter 28 of the corrugated plate incorporated in the ionizer and the ridges of the ground electrode 29 is approximately parallel to the direction of the airflow flowing through the ionization section. Reference numeral 31 denotes a breathable grounding plate provided upstream of the ionization section, and a pre-filter 32 is disposed between this breathable grounding plate and the intake port 26. 33 is a case, and 34 is a lid that covers the outlet 35 of the charged main filter 28. Next, we will explain the operation. Dust-containing air is sucked in through the intake port 26, coarse dust is removed by a prefilter 32, and when it reaches between the ionization electrode 21 and the counter electrode 22, fine dust is charged by the ion current. Load f! ! The dust flows into the charged main filter 28, receives electrostatic force from the local electric field of the charged main filter 28, and is attached to the fiber surface and collected. This causes the ionization f! of the main charging filter 28. ! A high voltage is applied between the pole side surface and the rear ground electrode 29 to form a high electric field and further improve dust collection efficiency.

Furthermore, this incoming air hits the crests of the waves formed by the charged main filter 28, generating vortices in the triangular portion formed by the crests and troughs. Due to this vortex flow, the dust becomes enlarged due to the dust colliding with each other, or the diffusion charge is increased by stirring the ultrafine dust within the charged group, and the dust collection efficiency can be improved. By improving dust collection efficiency in this way, it is possible to obtain a compact, lightweight, and inexpensive device. In the above embodiment, the charged main filter 28 is used as the main filter, but even in an uncharged case, if charged dust adheres to the ionization electrode side of the main filter 28,
Since a high electric field is formed between the ground electrode 29 and the surface of the main filter 28 on the ionization electrode side, a similar dust collection effect can be obtained. Effects of the Invention According to the present invention, the dust collection section is constructed of two layers of corrugated plates, the main filter and the ground electrode, and charged dust flows into the triangular portion formed by the crests and troughs of the waves of the main filter. By causing the dust to collide and generate a vortex flow, the dust collides with the dust and causes it to become enlarged and is uniformly charged, thereby improving the dust collection efficiency, thereby making it possible to obtain a compact, lightweight, and inexpensive device.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an electrostatic air purifier showing an embodiment of the present invention, Fig. 2 is a schematic diagram of a conventional electrostatic air purifier, and Fig. 3 is a diagram of another conventional electrostatic air purifier. Figure 4 is a partially enlarged view of the charged main filter. 21... Ionization electrode, 22... Counter electrode, 28.
...Charged main filter, 29...Grounding electrode, 30...
Frame agent Yoshihiro Morimoto/Figure 2/-. , 1st direction 冫い巫电 Poetry 22・Itun tank 2nd figure 8

Claims (1)

[Claims] 1. A dust collection section disposed downstream of the airflow flowing through the ionization section consisting of an ionization electrode and a counter electrode is equipped with a plurality of two-layer corrugated plates consisting of a main filter and a ground electrode, and the main filter of the corrugated plates is While facing the ionization part,
An electrostatic air cleaner arranged in a zigzag shape in a direction perpendicular to the inflow direction of the airflow flowing through the ionization section.