JP2009004127A - Ion generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ion generation device having a structure allowing even an AC power source of a commercial frequency to be downsized by being integrated with a discharge electrode. <P>SOLUTION: This ion generation device 1 generates corona discharge from the discharge electrode 2 by applying a high voltage to the discharge electrode 2 from an AC high-voltage power source 3 through a high-voltage cable 8 to generate positive and negative air ions. The discharge electrode 2 comprises a plurality of needle-like electrodes 6 arranged side by side in a horizontally-long tubular electrode case 4 formed of an insulation material in the longitudinal direction of the electrode case, and counter electrodes 7 arranged oppositely to the needle-like electrodes 6. The AC high-voltage power source 3 is composed by arranging, in a horizontally-long power source case 11, a winding transformer 9 with the high-voltage cable 8 connected to its secondary side, and a pulse generation circuit 10 applying pulse input to its primary side. The power source case 11 is superposed on the electrode case 4 to form both the cases integrally with each other, and the high-voltage case 8 is housed in both the cases. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ion generator that generates positive and negative air ions by corona discharge.

  2. Description of the Related Art Conventionally, an ion generating apparatus configured by connecting a discharge electrode to a high voltage power source via a high voltage cable is known. Here, the discharge electrode is composed of a needle electrode and a counter electrode, and a high voltage is applied between the needle electrode and the counter electrode to ionize air by corona discharge generated from the needle electrode. Generates air ions. Such an ion generator can neutralize the charge of the charged body with the generated air ions, and is also called a static eliminator.

  In general, the overall shape of the discharge electrode is a rod, and the discharge electrode is configured by arranging a plurality of needle-like electrodes in parallel in the longitudinal direction and arranging counter electrodes in parallel on both sides of the row of needle-like electrodes. Many. Usually, one or a plurality of such rod-shaped discharge electrodes are connected to a separately installed high-voltage power source via a high-voltage cable. In this case, when replacing the discharge electrodes, it is necessary to change the wiring of the high-voltage cable, and in addition to the complexity of the work, it is important to ensure electrical insulation since it is a construction of high-voltage wiring. It is. Therefore, in order to be able to safely and easily perform work such as replacement of the discharge electrode while ensuring insulation, the discharge electrode and the high-voltage power source are integrally arranged to reduce the size of the device and the high-voltage cable also It is desired to be housed inside.

  In the prior art, a high-voltage power supply can be configured in a small rod shape. In the AC method, a high-frequency power supply of several tens of kHz can be configured with a small high-frequency transformer, and this is integrated with a discharge electrode. (Patent Document 1).

  Further, since a DC high-voltage power supply can be reduced in size by a combination of a high-frequency transformer and a voltage doubler rectifier circuit, a discharge electrode device integrated with a DC high-voltage power supply has been put into practical use (Patent Document 2).

Furthermore, since the pulse AC type power supply having a frequency of 30 Hz or less can be reduced in size by a circuit similar to the DC high voltage power supply, a discharge electrode device integrated with an AC high voltage power supply has been put into practical use (Patent Document 3).
Japanese Utility Model Publication No. 63-80798 (static eliminator) JP-A-8-298196 (Integrated DC neutralizer) JP 2002-216996 A (Ionizer and its discharge electrode bar)

  However, it is desirable to use an AC power supply with a commercial frequency of 50 Hz or 60 Hz from the viewpoint of static elimination performance, but the conventional power supply integrated type that is downsized uses a power supply other than the commercial frequency as described above. there were. In addition, since the commercial frequency AC power supply is difficult to downsize with a winding transformer, the commercial frequency AC power supply has a problem that the discharge electrode and the high-voltage power supply cannot be integrated to achieve downsizing. .

  An object of the present invention is to provide an ion generating device having a structure that can be miniaturized by integrating with a discharge electrode even with an AC power source of commercial frequency.

  In order to achieve this object, the present invention reduces the size of the ion generator by forming the entire AC high-voltage power supply in an elongated shape and integrally forming it with a long horizontally long discharge electrode.

  Specifically, the present invention is an ion generator that generates positive and negative air ions by generating a corona discharge from a discharge electrode by applying a high voltage to the discharge electrode from an AC high-voltage power supply via a high-voltage cable. The discharge electrode is disposed in an electrode case made of an insulating material having a horizontally long cylindrical shape, and a plurality of needle-like electrodes arranged in parallel in the longitudinal direction of the electrode case, and facing the plurality of needle-like electrodes. The high-voltage power supply comprises a winding transformer in which the high-voltage cable is connected to the secondary side in a horizontally long power supply case, and a pulse generation circuit for applying a pulse input to the primary side of the winding transformer The power supply case is overlaid on the electrode case, the two cases are integrally formed, and the high-voltage cable is housed in both cases.

  In one embodiment of the present invention, the electrode case includes an air supply pipe and a plurality of air nozzle members arranged in parallel in the longitudinal direction of the electrode case, and the needle-like electrode is provided inside the air nozzle member. The air generated at the tip of the needle electrode by supplying air from the air supply pipe to each air nozzle member and ejecting the air from the air nozzle member in the vicinity of the needle electrode. Ions shall be transported far away.

  In another embodiment, the winding transformer includes a low-voltage stage transformer and a high-voltage stage transformer arranged in a lateral direction, and the high-voltage power supply is configured by arranging the pulse generation circuit next to the winding transformer. Store in the power supply case.

  In the ion generation apparatus of the present invention, the period of the pulses generated by the pulse generation circuit is, for example, in the range of 50 Hz to 1 kHz.

  Each acicular electrode of the discharge electrode is connected to the high voltage cable via a resistor or a capacitor.

  According to the ion generating apparatus of the present invention, the high voltage power source is integrally combined with the case of the discharge electrode, and the high voltage cable connecting the discharge electrode and the high voltage power source is also housed in the case, so that it is not exposed to the outside. The installation and maintenance of the discharge electrode is facilitated.

  The ion generator 1 of 1st Embodiment is comprised by the discharge electrode 2 and the alternating current high voltage power supply 3, as shown to FIG. 1, FIG. 2 (a) and (b).

  The discharge electrode 2 is composed of a long cylindrical insulating electrode case 4, a plurality of discharge nozzle portions 5 are arranged in the longitudinal direction of the electrode case 4, and the needle-like electrode 6 is arranged at the center of the discharge nozzle portion 5. The plate-like counter electrode 7 is arranged outside the electrode case 4 so as to face the needle electrode 6, and the high voltage cable 8 is arranged in the longitudinal direction inside the electrode case 4.

  The AC high-voltage power supply 3 includes a winding transformer 9 and a pulse generation circuit 10 that applies a pulsed input thereto. The winding transformer 9 and the pulse generation circuit 10 are arranged in a power supply case 11. The power supply case 11 is integrated with the electrode case 4 so as to straddle the electrode case 4 of the discharge electrode 2. The secondary side of the winding transformer 9 is connected to a high voltage cable 8 in the electrode case 4 by a connection line 12, and the high voltage cable 8 is connected to each needle electrode 6 by a connection line 13.

  Therefore, an AC high voltage is applied to the needle electrode 6 from the winding transformer 9 to form an AC high electric field between the needle electrode 6 and the counter electrode 7, and the electric field is concentrated on the tip of the needle electrode 6. By generating corona discharge, positive and negative air ions are generated.

  According to the above configuration, the high voltage cable 8, the connection line 12 and the connection line 13 are all housed in the power supply case 11 and the electrode case 4, and the high voltage portion is not exposed to the outside. 14 just goes out. Therefore, it is safe, no external wiring work for the high voltage cable 8 connecting the discharge electrode 2 and the AC high voltage power supply 3 is required, and the ion generator 1 can be easily attached or replaced.

  In the present embodiment, the power supply case 11 is integrated with the end of the electrode case 4, but the power supply case 11 may be disposed at the center of the electrode case 4.

  Next, as shown in FIGS. 3, 4 (a) and 4 (b), the ion generating apparatus 101 of the second embodiment has basically the same configuration of the discharge electrode 2 and the AC high-voltage power supply 3. The following configuration is added to the first embodiment.

  That is, an air supply port 15 is provided on the end face of the electrode case 4 of the discharge electrode 2, an air supply pipe 16 is provided inside the electrode case 4, and a plurality of air nozzle members 17 are arranged side by side in the longitudinal direction of the electrode case 4. Each air nozzle member 17 is provided with an air chamber 18 and an air ejection hole 19. The air nozzle member 17 is configured as the discharge nozzle portion 5 in the first embodiment and includes a partition for forming an air chamber 18 and an air ejection hole 19 therein.

  Here, the needle-like electrode 6 is arranged in the center of the air nozzle member 17, and air is supplied from the air supply pipe 16 to the air chamber 18 of each air nozzle member 17 and is ejected from the air ejection hole 19. Air flow is generated at the tip of the needle-like electrode 6 by the ejection of air in the vicinity of the needle-like electrode 6 (in the illustrated example, two places on both sides), and the air ions generated at the tip of the needle-like electrode 6 are transferred far away. Can be made.

  As shown in FIG. 5, the AC high-voltage power source 3 includes a winding transformer 9 and a pulse generation circuit 10, and the winding transformer 9 combines a low-voltage stage transformer 21 and a high-voltage stage transformer 22 and puts them sideways. Arrange them side by side. Furthermore, the pulse generation circuit 10 also includes a pulse generation circuit 23 and an ion balance control circuit 24 that controls the ion balance in ion generation by manipulating the pulse width, the pulse period, and the like. Then, by arranging the circuits 23 and 24 side by side so that the AC high-voltage power supply 3 has an elongated shape as a whole, the AC high-voltage power supply 3 can be integrated across the discharge electrode 2.

  Further, since the electromotive force per winding of the winding transformer 9 is proportional to the input frequency, the number of turns of the winding can be reduced and the transformer can be downsized when the frequency is increased. Therefore, it is advantageous for reducing the size of the winding transformer that the frequency of the pulse generated in the pulse generation circuit device 10 is higher than the commercial frequency of 50 Hz. Furthermore, by generating positive and negative air ions at a high frequency, it is possible to cope with static electricity removal of a charged object moving at high speed. When the frequency is too high, dirt adheres to the needle-like electrode, and therefore the frequency is suitable in the range of 50 Hz to 1 kHz.

  In the illustrated ion generator 1, since a high voltage is applied to the needle electrode 6, for safety, a connection line connecting the high voltage cable 8 and the needle electrode 6 as shown in FIG. 6. By interposing the resistor 25 in 13, the short-circuit current from the needle electrode 6 can be limited. As the resistor 25, a resistor having a withstand voltage as an electrical wiring component or a resistor material having an appropriate resistance value can be used.

  Further, as shown in FIG. 7, the short-circuit current from the needle electrode 6 can be limited by interposing the capacitor body 26 in the connection line 13 connecting the high voltage cable 8 and the needle electrode 6. . As the capacitor 26, a capacitor may be formed by a parallel flat plate type or double cylinder type electrode structure including a capacitor part having a withstand voltage as an electric wiring part or the high voltage cable 8.

  The ion generator of the present invention has a power integrated structure in which the high-voltage cable is not exposed to the outside while the ion generation characteristics are the same as the conventional one. Applicable to electricity countermeasures.

The front view of the ion generator of the 1st Embodiment of this invention. (A) is the side view which showed a part of ion generator of 1st Embodiment in the cross section, (b) is the 2B-2B sectional view taken on the line of (a). The front view of the ion generator of the 2nd Embodiment of this invention. (A) is the side view which showed a part of ion generator of 2nd Embodiment in the cross section, (b) is the 4B-4B sectional view taken on the line of FIG. 4 (a). The block diagram of alternating current high voltage power supply. The figure which shows the structure which connected the discharge electrode to the high voltage | pressure cable through resistance. The figure which shows the structure which connected the discharge electrode to the high voltage | pressure cable through the capacity | capacitance.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,101 ... Ion generator, 2 ... Discharge electrode, 3 ... AC high voltage power supply, 4 ... Electrode case, 5 ... Discharge nozzle part, 6 ... Needle electrode, 7 ... Counter electrode, 8 ... High voltage cable, 9 ... Winding Line transformer, 10 ... Pulse generation circuit, 11 ... Power supply case, 12, 13 ... Connection line, 15 ... Air supply port, 16 ... Air supply pipe, 17 ... Air nozzle member, 18 ... Air chamber, 19 ... Air ejection hole, 25 ... resistor, 26 ... capacitor.

Claims (6)

In an ion generator for generating positive and negative air ions by generating a corona discharge from the discharge electrode by applying a high voltage from a high-voltage cable from an AC high-voltage power supply to the discharge electrode,
The discharge electrode has a plurality of needle-like electrodes arranged in parallel in the longitudinal direction of the electrode case in an electrode case made of a horizontally long cylindrical insulating material, and a counter-position arranged to face the plurality of needle-like electrodes. Consisting of electrodes,
The high-voltage power source is configured by arranging, in a horizontally long power supply case, a winding transformer in which the high-voltage cable is connected to the secondary side, and a pulse generation circuit that applies a pulse input to the primary side of the winding transformer,
The ion generator is characterized in that the power supply case is overlaid on the electrode case, the two cases are integrally formed, and the high-voltage cable is housed in both cases. The ion generator according to claim 1,
An air supply pipe and a plurality of air nozzle members arranged in parallel in the longitudinal direction of the electrode case are provided in the electrode case, and the needle-like electrode is arranged inside the air nozzle member to supply the air Air is supplied from a tube to each air nozzle member and air is ejected from the air nozzle member in the vicinity of the needle-like electrode, thereby transferring air ions generated at the tip of the needle-like electrode to a distance. An ion generator. In the ion generator according to claim 1 or 2,
The winding transformer is composed of a low-voltage stage transformer and a high-voltage stage transformer arranged in a lateral direction, and the high-voltage power supply is housed in the power supply case by arranging the pulse generation circuit beside the winding transformer. An ion generator characterized by that.   The ion generator according to any one of claims 1 to 3, wherein a period of a pulse generated by the pulse generation circuit is in a range of 50 Hz to 1 kHz.   5. The ion generating apparatus according to claim 1, wherein each of the needle electrodes of the discharge electrode is connected to the high-voltage cable through a resistor.   5. The ion generating apparatus according to claim 1, wherein each of the needle-like electrodes of the discharge electrode is connected to the high-voltage cable through a capacitor.

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