JP2007109538A - Negative ion generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an electrostatic precipitator used in an air conditioner that achieves maximum dust electrification efficiency under a fixed voltage and a fixed electric current by optimizing a discharge electrode of an ionizing part of the electrostatic precipitator, and that has a stable discharge characteristic. <P>SOLUTION: A negative ion generator 1 generates negative ions by generating a corona discharge between a discharge electrode 4 and a counter electrode 3. The counter electrode 3 of the negative ion generator 1 is formed into a flat shape or a bar-like shape, thus making it possible to maximize the amount of negative ions generated under a fixed voltage and a fixed electric current, and to attain stable discharge characteristics. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a negative ion generator, and more particularly to a counter electrode.

  As shown in FIG. 4, a conventional negative ion generator generates corona discharge by arranging a plurality of discharge electrode needles on a metal plate at regular intervals in order to increase dust collection efficiency, thereby collecting dust collection efficiency. (For example, refer to Patent Document 1).

Due to the configuration described above, the distance between the discharge electrode 17 and the counter electrode 18 is kept constant, stable discharge is performed, and the protrusions of the discharge electrode are arranged at an appropriate interval, so that The corona discharge current generated between the counter electrodes can be spread uniformly, and the dust contained in the air passing therethrough can be efficiently charged, and the dust collection efficiency can be improved.
JP-A-5-184969

  In order to improve the dust collection efficiency in the electric dust collector, it is necessary to increase the collision amount of the electrons contained in the current generated by the corona discharge and the dust contained in the air passing therethrough. The amount of dust collision needs to increase the current passing per unit area or increase the surface area of the electrostatic precipitator to increase the amount of air passing.

  However, in order to increase the current value of the corona discharge in the conventional configuration, it is necessary to raise the applied voltage. However, if the voltage is increased more than necessary, reliability such as ignition due to a short circuit is reduced. Therefore, it is necessary to increase the corona current under a certain voltage to improve the dust collection efficiency.

  Further, in order to increase the surface area of the electrostatic precipitator and increase the amount of air passing, the number of protrusions provided on the discharge electrode 17 in FIG. 4 increases in proportion to the surface area. The increase in the value causes an excessive burden on the power supply of the electrostatic precipitator, which causes a problem of an increase in cost due to a rapid increase in the required specifications of the electrical equipment.

  The present invention has been made to solve the above-described problems. By optimizing the counter electrode, the amount of negative ions generated under a constant voltage and a constant current is maximized, and stable discharge characteristics are obtained. It aims at obtaining the negative ion generator which has this.

  In order to solve the above problems, a negative ion generator of the present invention is a negative ion generator that generates a negative ion by generating a corona discharge between a discharge electrode and a counter electrode. Is flat or rod-shaped.

  This makes it possible to obtain a negative ion generator that maximizes the amount of negative ions generated under a constant voltage and constant current and has stable discharge characteristics.

The negative ion generator of the present invention can maximize the amount of negative ions generated under a constant voltage and a constant current, and can have stable discharge characteristics.

  The first invention is a negative ion generator for generating negative ions by generating a corona discharge between a discharge electrode and a counter electrode, wherein the counter electrode in the negative ion generator is a flat plate or a rod. It is.

  In the second invention, in particular, the counter electrode of the first invention has a bent portion in which a flat or bar-like tip is bent.

  In the third invention, in particular, the counter electrode of the first invention has a straight portion and a curved portion.

  In the fourth invention, in particular, the bent portion of the counter electrode of the second invention is opposed to the discharge electrode side.

  In the fifth aspect of the invention, in particular, the closest part that opposes the discharge electrode of the counter electrode of the first aspect of the invention is a dot shape or a line shape.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a perspective view showing a negative ion generator in a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the main part of the negative ion generator in the first embodiment of the present invention. FIG. 3 is a perspective view after assembling the main part of the negative ion generator in the first embodiment of the present invention.

  In FIG. 1, the negative ion generator 1 is configured by combining a counter electrode 3 made of a metal plate and a discharge electrode 4 made of a pair of metal needles orthogonal to the counter electrode 3. The counter electrode 3 is electrically grounded. Reference numeral 2 denotes a negative ion generator lower cover that accommodates the counter electrode 3 and the discharge electrode 4.

  Based on FIG. 2 and FIG. 3, the structure of the counter electrode 3 and the discharge electrode 4 is demonstrated.

  The discharge electrode 4 includes a needle portion 4A and a metal plate portion 4B, and the metal plate portion 4B is manufactured by punching a metal plate. The metal plate portion 4B includes a connection portion 5 to which a high-voltage electric wire is connected, and a fastening portion 6 to be fastened to the lower ion generator lower cover 2 with a fastening screw (not shown). In addition, when the needle part 4A and the metal plate part 4B are accommodated in the lower ion generator lower cover 2, each is electrically connected.

  The counter electrode 3 includes an electrode portion 3A and a metal plate portion 3B. The electrode portion 3A and the metal plate portion 3B are integrally manufactured by punching a metal plate on a flat plate, and the electrode portion 3A is planted by bending. It is. The metal plate portion 3B includes a connection portion 7 to which a high-voltage electric wire is connected and a fastening portion 8 fastened to the negative ion generator lower cover 2 with a fastening screw (not shown). The tip of the electrode portion 3 </ b> A is a bent portion 3 </ b> C that is bent, and the bent portion 3 </ b> C faces the needle portion 4 </ b> A of the discharge electrode 4. More specifically, the closest bent portion 3C facing the needle portion 4A of the discharge electrode 4 has a linear shape. When the discharge electrode 4 and the counter electrode 3 are accommodated in the lower ion generator lower cover 2, they are arranged apart from each other by a predetermined distance, and the height position of the tip of the needle portion 4 </ b> A of the discharge electrode 4. Is higher in the horizontal direction than the height position of the tip of the electrode portion 3A of the counter electrode 3.

  In the negative ion generator configured as described above, the counter electrode 3 having a flat plate structure increases the number of negative ions generated by corona discharge discharged from the discharge electrode. In particular, since the nearest bent portion 3C facing the needle portion 4A of the discharge electrode 4 has a linear shape, a lot of negative ions are generated. Conventionally, the generation amount of general negative ions was 300,000 / CC, but the generation amount of negative ions according to the present embodiment was confirmed to be 1,000,000 / CC or more. In addition, the corona current value at a constant current value is greatly reduced, ozone is not generated, and a stable amount of negative ions can be obtained.

  In the present embodiment, the electrode portion 3A has a flat plate shape. However, the electrode portion 3A may have a rod shape, and a bent portion may be formed by bending the rod-shaped tip as in the present embodiment. It is. At this time, the bent portion of the closest portion facing the needle portion 4A of the discharge electrode 4 has a point shape.

  As described above, the negative ion generator according to the present invention can maximize the amount of negative ions generated under a constant voltage and a constant current, and can have stable discharge characteristics. Is available.

The perspective view which shows the negative ion generator in the 1st Embodiment of this invention The disassembled perspective view of the principal part of the negative ion generator in the 1st Embodiment of this invention The principal part perspective view of the negative ion generator in the 1st Embodiment of this invention Main part perspective view which shows the conventional electrostatic precipitator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Negative ion generator 2 Negative ion generator lower cover 3 Counter electrode 3A Electrode part 3B Metal plate part 3C Bending part 4 Discharge electrode 4A Needle part

Claims (5)

A negative ion generator for generating negative ions by generating corona discharge between a discharge electrode and a counter electrode, wherein the counter electrode in the negative ion generator has a flat plate shape or a rod shape. Generator. The negative electrode generator according to claim 1, wherein the counter electrode has a bent portion obtained by bending a flat or bar-shaped tip. The negative electrode generator according to claim 1, wherein the counter electrode has a straight portion and a curved portion. The negative ion generator according to claim 2, wherein the bent portion of the counter electrode is opposed to the discharge electrode side. 2. The negative ion generator according to claim 1, wherein the closest portion of the counter electrode facing the discharge electrode has a point shape or a line shape.

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