JPS60172364A - Electrostatic air purifier - Google Patents

Abstract

PURPOSE:To obtain the titled air purifier having sufficient dimensional accuracy at low cost, and to facilitate the assembling by combining counter electrodes and accelerating electrodes which are respectively formed and retained by a binding member with retainers consisting of an inorganic insulating material at both ends of the electrodes. CONSTITUTION:The counter electrodes 22 consisting of nine members in all and eight accelerating electrodes 23 provided between the counter electrodes 22 each having two throttling hole parts 24 and 25 on both sides are combined and kept at a specified pitch by two metallic pipes 26 and 27 having the same length which are forced and fitted into said holes. In addition, the part of the counter electrode 22 facing the metallic pipe 27 and the part of the accelerating electrode 23 facing the metallic pipe 26 are respectively notched, and the electrodes are united to a body on both end parts by retainers 28 and 29 each provided with a flat-surface end part 31 to form an electrode part.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrostatic air cleaner used for general homes, automobiles, clean rooms, and the like.

Configuration of conventional example and its problems Figures 1 and 2 show the configuration of the electrode section of a conventional electrostatic air cleaner, where 1 is an ionizing electrode, 2 is a counter electrode,
3 is an accelerating electrode, and the opposing electrode 2 and accelerating electrode 3 are connected to the axis 4.
and 6 and spacers 6 and 7, and are positioned and held at equal intervals.

Furthermore, the accelerating electrode 3 is integrally connected to the inner end surface 9 of a holder 8 made of an inorganic insulator, which is integrally fixed to the counter electrode 2 . A through hole 10 having a sufficient insulation space distance is formed in the portion where the shafts 4 and 6 of the counter electrode 2 and the acceleration electrode 3 pass, and a handle portion 11 is provided on one of the outermost counter electrodes 2. . A high voltage is applied between the ionization electrode 1 and the counter electrode 2 and between the acceleration electrode 3 and the counter electrode 2 to form a high electric field by a high voltage power supply.

12 is the main case forming the outer shell; 13 is the intake port; 14
is an exhaust port, 16 is breathable activated carbon, and the main case 12 is
A lid 16 is rotatably attached to the front surface of the lid 16 for taking in and out the electrode section, etc.

In this configuration, when a corona current flows between the ionizing electrode 1 and the counter electrode 2 due to a high electric field, the ions collide with the air, and an air flow is generated due to viscosity.The charged dust is subjected to an electrostatic force by the electric field and the counter electrode 2. The dust is collected by suction. Furthermore, ozone and other odor components generated by the corona are adsorbed by the breathable activated carbon 16 and are discharged as clean air from the exhaust port 14.

At this time, especially when the processing air volume is large and the dust collection efficiency is high, it is necessary to increase the number of electrodes with small pitch intervals. The number of electrodes required to be assembled alternately while inserting the two electrodes increases, which increases the cost and increases the cost of the electrode parts that are attached to the device.

Since the father electrode part must be cleaned periodically, it was necessary to use an inorganic insulator that does not change even if cleaning liquid remains in the joint part of the counter electrode 2 and accelerating electrode 3 and creeping discharge occurs. The method of positioning by providing a stepped portion requires precision in the dimension of the stepped portion, requiring post-processing and the use of special ceramic particles, which is costly and difficult to ensure positional accuracy.

Also, if spacer 6.7 is used, each spacer 6.7
A through hole 10 having a sufficient insulation distance than the outer diameter of the spacer is required in the electrode plate on the other side that intersects with the spacer, and this reduces the dust collection area of the electrode plate, resulting in a problem that the device cannot be made compact. Ta.

OBJECTS OF THE INVENTION The present invention solves these conventional problems and provides a compact electrode section that ensures safety, requires fewer assembly steps, is inexpensive, and provides easy positioning accuracy.

Structure of the Invention The present invention consists of a counter electrode formed by holding both ends of a plurality of electrode plates at intervals with a connecting member A, an accelerating electrode also held by a connecting member B, and a flat end made of an inorganic insulating material. and a holder provided with a connecting member A and a connecting member B.
It is an electrode part in which a counter electrode and an accelerating electrode are integrally combined by abutting both ends of the holder against the flat end of the holder, and the counter electrode and the accelerating electrode can be assembled separately, and the holding tool has a simple external shape. The pinch dimension between the electrode plates can be obtained with high accuracy by using the .

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 3 and 4 showing the structure of the electrode section.

In this embodiment, a total of nine opposing electrodes 22 and eight accelerating electrodes 23 disposed between these opposing electrodes 22 are as follows:
Each has two throttle holes 24 and 26 on both sides, and is held at a specified pitch between two metal pipes 26 and 27 of the same length that are press-fitted into the throttle holes 24 and 25. , are combined.

The part where the counter electrode 22 faces the metal pipe 27 is cut out, and the part where the acceleration electrode 23 faces the metal pipe 26 is also cut out, so the nine groups of counter electrodes 22 and the eight groups of acceleration electrodes 23 each have a cutout. The structure is such that they are integrally connected by metal pipes 26 and 2 and can be separated separately.

In this embodiment, the metal pipes 26 and 27 are made of aluminum or copper metal, and after being inserted into the choke holes 24 and 26, the electrodes are held at specified intervals by a jig (not shown). Air pressure is applied to the pipe from both sides to expand its outer diameter, and the pipes are connected by tightly fitting the pipes into the constricted holes 24 and 25.

The electrode section of this embodiment described above has exactly the same function as the electrode section of the electrostatic air cleaner shown in Fig. 1, and is capable of collecting fine dust in the air. Although Figure 1 shows an air purifier that uses ionic wind as a super-air source, it can also be used as a dust collection electrode in an electrostatic air purifier that uses a motor fan.

Effects of the Invention As described above, according to the present invention, a holder that requires the use of materials such as ceramics that are difficult to achieve dimensional accuracy can be constructed as long as the smoothness of the flat end portion is achieved, so it can be used at a low price. It provides dimensional accuracy, and compared to the conventional method that uses spacers, etc., which requires a large number of assembly steps, it is easy to automate and has high mass production, and its industrial value is remarkable. Compared to the case where the electrode part is notched, the number of notches in the electrode is reduced by the difference between the outer diameter of the spacer and the outer diameter of the metal pipe, and the dust collecting part is increased, so that the electrode part can be made more compact.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional electrostatic air cleaner, FIG. 2 is a partial sectional view taken along line A-A in FIG. 1, and FIG. 3 is an electrostatic air cleaner according to an embodiment of the present invention. FIG. 4 is a partial cross-sectional view of the electrode section of the cleaner, taken along line E-B in FIG. 3. 22...Counter electrode, 23...Acceleration electrode,
26°27...Metal pipe, 28.29...
...Holder, 31...Flat end, 33.34
・・・・・・Notch part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3 Figure 2

Claims (1)

[Claims] (1) A coupling member A that holds the redirecting electrodes at intervals;
It has a coupling member B that holds the accelerating electrode located between the opposing electrodes, and a holder made of an inorganic insulator provided with a flat end, and holds each end face of the coupling member A and the coupling member B. An electrostatic air cleaner comprising an accelerating electrode disposed between the opposing electrodes, the accelerating electrode being integrally fixed with the holder in contact with the flat end of the tool. Q) The electrostatic air cleaner according to claim 1, wherein the counter electrode and the accelerating electrode are provided with a notch having a sufficient insulating spatial distance.