JP4723319B2 - Ion generator - Google Patents

Description

  The present invention relates to an ion generating apparatus that generates positive and negative air ions suitable for neutralizing static electricity of a charged body to eliminate static electricity by generating corona discharge in the air.

  2. Description of the Related Art Conventionally, ion generators that generate positive and negative air ions suitable for neutralizing static electricity of a charged body and neutralizing static electricity are known. Such an ion generating device can neutralize the charge of the charged body with the generated positive and negative air ions, and is generally used as a static eliminator that removes static electricity from the charged body.

  In such an ion generating apparatus, there is known a DC corona discharge type ion generating apparatus including a discharge electrode section that generates corona discharge and a high-voltage power source that applies positive and negative DC high voltages to the discharge electrode section. It has been. In this DC corona discharge type ion generator, the discharge electrode section includes a positive discharge needle that generates positive corona discharge to generate positive air ions, and a negative corona discharge that generates negative corona discharge. A negative discharge needle for generating The positive discharge needle is connected to the positive output of the high voltage power supply, and the negative discharge needle is connected to the negative output of the high voltage power supply. Then, positive and negative DC high voltages output from the high-voltage power supply are applied to the positive and negative discharge needles, respectively. As a result, positive and negative corona discharges are generated at the tips of the positive and negative discharge needles, and positive and negative air ions are generated. The charged body charged with the positive charge is neutralized and neutralized by the negative air ions generated by the negative discharge needle, and the charged body charged with the negative charge is discharged on the positive side. Neutralized and neutralized by positive air ions generated by the needle.

  At this time, if the generation amount of positive and negative air ions is not balanced, the air ions having the polarity necessary to neutralize the charge of the charged body are insufficient, and the charge remains in the charged body. There is. In addition, reverse charging may occur, in which the charged body is charged by excessively generated polar air ions. Therefore, in the ion generation apparatus, it is desirable to appropriately adjust the balance between the generation amounts of positive and negative air ions.

  For this reason, the ion generator includes a sensor that detects a balance between the generation amounts of positive and negative air ions, and feedback-controls the output voltage on the positive side or the negative side of the high-voltage power source according to the detection result of the sensor. It is conceivable to adjust the balance between the generation amount of positive and negative air ions. However, in order to adjust the production balance of air ions in this way, a sensor and a control means are required, so there is a disadvantage that the configuration of the apparatus becomes complicated.

  Therefore, as an ion generator that adjusts the air ion generation balance with a simpler configuration, the positive voltage of the high-voltage power supply is based on the balance between the positive and negative air ion generation amounts physically determined from the phenomenon of ion generation. An ion generator that adjusts the balance between the output voltage on the side and the output voltage on the negative side has been proposed (see, for example, Patent Document 1). In the ion generating device of Patent Document 1, in consideration of the characteristic that negative air ions are more easily generated than positive air ions, the absolute value of the negative side output voltage of the high voltage power source is calculated on the positive side of the high voltage power source. By reducing the absolute value of the output voltage by a predetermined value in advance, the production balance of air ions is appropriately adjusted.

  In addition, there has been proposed an ion generation device that adjusts the generation balance of air ions by arranging ground electrodes in the vicinity of the positive and negative discharge needles (see, for example, Patent Document 2). According to the ion generator of Patent Document 2, the amount of positive and negative air ions flowing into the ground electrode changes according to the distance between the arranged ground electrode and the positive and negative discharge needles. The balance of the production amount of negative air ions changes. Therefore, in the ion generation device of Patent Document 2, the ground electrode is arranged at a predetermined position based on the characteristics of the balance between the generation amount of positive and negative air ions physically determined from the phenomenon of ion generation. The ion production balance is appropriately adjusted.

However, in the ion generators of Patent Document 1 and Patent Document 2, the air ion generation balance is adjusted in advance based on the balance characteristics of the positive and negative air ion generation amounts physically determined from the phenomenon of ion generation. It is what is done. At this time, for example, if the operation of the apparatus is continued and dirt is attached to the tip of the discharge needle, the amount of air ions generated by the discharge needle changes due to the attached dirt. In general, the degree of contamination differs between the positive discharge needle and the negative discharge needle. For this reason, when the operation of the apparatus is continued, the characteristic of the balance between the generation amount of positive and negative air ions becomes different from the initial characteristic of the operation of the apparatus due to the influence of contamination of the discharge needle. Therefore, in the ion generators of Patent Literature 1 and Patent Literature 2, even when a good air ion production balance is obtained at the initial stage of operation of the device, if the operation of the device is continued, the contamination of the discharge needle, etc. Due to the influence, there is a disadvantage that the production balance of air ions is not properly adjusted.
Japanese Utility Model Publication No. 5-31200 Japanese Patent Laid-Open No. 5-114496

  An object of the present invention is to provide an ion generation apparatus that can eliminate such inconvenience and can stably and appropriately adjust the balance between the generation amounts of positive and negative air ions with a simple configuration.

  In order to achieve such an object, the ion generating apparatus according to the first aspect of the present invention includes a pair of insulated discharge electrode portions each having a discharge needle made of a conductor, and one of the pair of discharge electrode portions. The first discharge electrode unit and the second discharge electrode unit, which is the other of the pair of discharge electrode units, include a high-voltage power supply that applies positive and negative DC high voltages, respectively, and the positive and negative DC high voltages By applying voltage, corona discharge generated at the tip of the first discharge needle that is the discharge needle of the first discharge electrode portion and the second discharge needle that is the discharge needle of the second discharge electrode portion, respectively, is positive and negative. In the ion generating apparatus for generating air ions, a third electrode portion is provided which is insulated from the first and second discharge electrode portions and is made of a conductor provided to face the first and second discharge needles, The first discharge electrode portion and the second discharge electrode portion are connected to a predetermined A first resistor having a resistance value and a second resistor having a predetermined resistance value are connected via a series circuit formed by connecting in series, and the third electrode portion is connected to a connection portion between the first resistor and the second resistor. It is characterized by connecting.

  According to the ion generator of the first aspect of the present invention, the first discharge electrode portion and the second discharge electrode portion are connected via a series circuit formed by connecting the first resistor and the second resistor in series. The third electrode portion is connected to a connection portion between the first resistor and the second resistor. As a result, the potential of the third electrode unit varies depending on the resistance value of the first resistor and the magnitude of the current flowing through the first resistance, and the resistance value of the second resistance and the magnitude of the current flowing through the second resistance. This is a potential obtained by dividing the voltage between the discharge electrode portion and the second discharge electrode portion.

  At this time, the magnitude of the positive DC high voltage applied to the first discharge electrode part and the magnitude of the negative DC high voltage applied to the second discharge electrode part are determined in advance to a predetermined constant value. Furthermore, the predetermined resistance values of the first resistance and the second resistance are, for example, when the generation amounts of positive air ions and negative air ions are equivalent due to corona discharge described later of the first and second discharge needles. The potential of the third electrode portion is determined in advance to be zero.

  When a positive DC high voltage is applied to the first discharge electrode part, an electric field concentrated on the tip of the first discharge needle is formed between the first discharge electrode part and the third electrode part. Then, positive air ions are generated by corona discharge generated at the tip of the first discharge needle by this electric field. Further, when a negative DC high voltage is applied to the second discharge electrode part, an electric field concentrated on the tip of the second discharge needle is formed between the second discharge electrode part and the third electrode part. Then, negative air ions are generated by corona discharge generated at the tip of the second discharge needle by this electric field. A part of the generated positive and negative air ions is supplied to the charged body, and the remaining part flows into the third electrode part.

  At this time, for example, when the amount of positive air ions generated is larger than the amount of negative air ions generated, more positive air ions flow into the third electrode portion. That is, a positive current flows into the third electrode portion. Therefore, in addition to the current flowing from the first discharge electrode portion to the second discharge electrode portion via the first resistor and the second resistor, the current flowing from the third electrode portion to the second discharge electrode portion via the second resistor is Arise. For this reason, since the current flowing through the second resistor is larger than the current flowing through the first resistor, the potential of the third electrode portion is biased to the positive side. When the potential of the third electrode part is biased to the positive side, the electric field concentrated on the tip of the first discharge needle formed between the first discharge electrode part and the third electrode part is It becomes weaker than before the potential is biased. For this reason, since the production amount of positive air ions decreases, the production balance of air ions changes so that the production amounts of positive and negative air ions are equal.

  For example, when the amount of negative air ions generated is larger than the amount of positive air ions generated, more negative air ions flow into the third electrode portion. That is, a negative current flows into the third electrode portion. Therefore, in addition to the current flowing from the first discharge electrode part to the second discharge electrode part via the first resistor and the second resistor, the negative current flowing from the third electrode part to the first discharge electrode part via the first resistor A current (current flowing from the first discharge electrode portion to the third electrode portion) is generated. For this reason, since the current flowing through the first resistor is larger than the current flowing through the second resistor, the potential of the third electrode portion is biased to the negative side. When the potential of the third electrode part is biased to the negative side, the electric field concentrated on the tip of the second discharge needle formed between the second discharge electrode part and the third electrode part is It becomes weaker than before the potential is biased. For this reason, since the production amount of negative air ions decreases, the production balance of air ions changes so that the production amounts of positive and negative air ions are equal.

  Thereby, for example, even if the operation of the apparatus is continued and the characteristics of the balance between the positive and negative air ion generation amount change due to the contamination of the discharge needle, etc., the air ion generation balance is preset. Self-adjusting appropriately to the desired balance. Therefore, according to the ion generating apparatus of the first aspect of the present invention, the balance of the generation amount of positive and negative air ions can be stably adjusted appropriately with a simple configuration regardless of the operating state of the apparatus. Can do.

  The high-voltage power supply includes, for example, a DC power supply circuit that outputs a DC voltage of a constant value, a high-frequency oscillation circuit that inputs a DC voltage from the DC power supply circuit and outputs a high-frequency voltage, and an output of the high-frequency oscillation circuit is A high-frequency transformer connected to the primary side and a positive and negative voltage doubler rectifier circuit connected to the secondary side of the high-frequency transformer and generating positive and negative DC high voltages, respectively. According to this, both positive and negative DC high voltages can be output using a DC power supply circuit, a high-frequency oscillation circuit, and a high-frequency transformer in common. Therefore, the ion generating apparatus can be made smaller and lighter than the case where the DC high-voltage power source that generates a positive DC high voltage and the DC high-voltage power source that generates a negative DC high voltage are separately provided.

  Alternatively, the ion generating apparatus of the second aspect of the present invention includes a pair of insulated discharge electrode portions having a discharge needle made of a conductor, and a first discharge electrode portion that is one of the pair of discharge electrode portions, And a second discharge electrode part, which is the other of the pair of discharge electrode parts, with a high-voltage power supply that applies positive and negative DC high voltages, respectively, and by applying the positive and negative DC high voltages, Positive and negative air ions are generated by corona discharge generated at the tip of the first discharge needle that is the discharge needle of the first discharge electrode portion and the second discharge needle that is the discharge needle of the second discharge electrode portion, respectively. The ion generating apparatus includes a third electrode portion made of a conductor that is insulated from the first and second discharge electrode portions and is provided to face the first and second discharge needles, the first discharge electrode portion And the second discharge electrode portion are respectively resistors having variable resistance values. It connects to this 3rd electrode part via, It is characterized by the above-mentioned.

  According to the ion generator of the second aspect of the present invention, the first discharge electrode portion and the second discharge electrode portion are connected to the third electrode portion via a resistance having a variable resistance value, respectively. . As a result, the potential of the third electrode portion is such that the magnitude of the resistance value between the first discharge electrode portion and the third electrode portion, the magnitude of the current flowing through this portion, the second discharge electrode portion and the third electrode The voltage between the first discharge electrode portion and the second discharge electrode portion is a potential divided according to the magnitude of the resistance value between the first discharge electrode portion and the current flowing through this portion.

  At this time, the magnitude of the positive DC high voltage applied to the first discharge electrode part and the magnitude of the negative DC high voltage applied to the second discharge electrode part are determined in advance to a predetermined constant value. Furthermore, the resistance value between the first discharge electrode part and the third electrode part and the resistance value between the second discharge electrode part and the third electrode part will be described later, for example, for the first and second discharge needles. It is set so that the potential of the third electrode portion becomes 0 when the generation amounts of positive air ions and negative air ions by corona discharge are equal. At this time, according to the ion generating device of the second aspect, since the resistance having a variable resistance value is used, for example, even after the device is assembled, by changing the setting of the resistance value, The potential can be easily adjusted. For this reason, the potential of the third electrode portion can be easily set so that the production balance of air ions is self-adjusted to a desired balance.

  And like the ion generator of the 1st mode, when a positive direct-current high voltage is applied to the 1st discharge electrode part, between the 1st discharge electrode part and the 3rd electrode part, An electric field concentrated on the tip of the first discharge needle is formed, and positive air ions are generated by corona discharge generated at the tip of the first discharge needle by this electric field. Further, when a negative DC high voltage is applied to the second discharge electrode part, an electric field concentrated on the tip of the second discharge needle is formed between the second discharge electrode part and the third electrode part. Then, negative air ions are generated by corona discharge generated at the tip of the second discharge needle by this electric field. A part of the generated positive and negative air ions is supplied to the charged body, and the remaining part flows into the third electrode part.

  At this time, for example, when the amount of positive air ions generated is larger than the amount of negative air ions generated, more positive air ions flow into the third electrode portion. That is, a positive current flows into the third electrode portion. Therefore, according to the ion generator of the second aspect, in addition to the current flowing from the first discharge electrode portion to the second discharge electrode portion, the current flowing from the third electrode portion to the second discharge electrode portion is generated. For this reason, since the current flowing through the resistance between the second discharge electrode portion and the third electrode portion is larger than the current flowing through the resistance between the first discharge electrode portion and the third electrode portion, the first aspect As in the case of the ion generating apparatus, the potential of the third electrode portion is biased to the positive side. When the potential of the third electrode part is biased to the positive side, the electric field concentrated on the tip of the first discharge needle formed between the first discharge electrode part and the third electrode part is It becomes weaker than before the potential is biased. For this reason, since the production amount of positive air ions decreases, the production balance of air ions changes so that the production amounts of positive and negative air ions are equal.

  For example, when the amount of negative air ions generated is larger than the amount of positive air ions generated, more negative air ions flow into the third electrode portion. That is, a negative current flows into the third electrode portion. Therefore, according to the ion generator of the second aspect, in addition to the current flowing from the first discharge electrode portion to the second discharge electrode portion, the negative current (first discharge) flowing from the third electrode portion to the first discharge electrode portion. Current from the electrode portion to the third electrode portion) occurs. For this reason, since the current flowing through the resistance between the first discharge electrode portion and the third electrode portion is larger than the current flowing through the resistance between the second discharge electrode portion and the third electrode portion, the first aspect As in the case of the ion generating apparatus, the potential of the third electrode portion is biased to the negative side. When the potential of the third electrode part is biased to the negative side, the electric field concentrated on the tip of the second discharge needle formed between the second discharge electrode part and the third electrode part is It becomes weaker than before the potential is biased. For this reason, since the production amount of negative air ions decreases, the production balance of air ions changes so that the production amounts of positive and negative air ions are equal.

  Thereby, for example, even if the operation of the apparatus is continued and the characteristics of the balance between the positive and negative air ion generation amount change due to the contamination of the discharge needle, etc., the air ion generation balance is preset. Self-adjusting appropriately to the desired balance. Therefore, according to the ion generating apparatus of the second aspect of the present invention, as with the ion generating apparatus of the first aspect, the balance of the generation amount of positive and negative air ions is stable regardless of the operating state of the apparatus. Thus, it can be adjusted appropriately with a simple configuration. The high-voltage power supply of the ion generator of the second aspect can be configured in the same manner as the high-voltage power supply of the ion generator of the first aspect.

  Furthermore, in the ion generating apparatus according to the first and second aspects of the present invention, the third electrode part is composed of two rod-like electrodes arranged in parallel to each other, and the first discharge needle and the second electrode The discharge needle is disposed between the two rod-shaped electrodes on one row determined to be parallel to the two rod-shaped electrodes, and each of the rows has the first discharge. It is preferable that the needles and the second discharge needles are arranged so as to be alternately arranged with the axial centers of the respective discharge needles oriented in a direction perpendicular to the row.

  Alternatively, in the ion generation apparatus according to the first aspect and the second aspect of the present invention, the third electrode unit is configured by one bar-shaped electrode, and the first discharge needle and the second discharge needle are the one bar-shaped. On one side of the two sides of the electrode on at least one row defined to be parallel to the one rod-shaped electrode and to be parallel to the one rod-shaped electrode on the other side Are arranged on the same number of rows as the one side row, and each of the one side row has one or more first discharge needles arranged in the axial center of each discharge needle. Are arranged in a direction perpendicular to the row, and one or more second discharge needles are arranged in the row on the other side, and the axis of each discharge needle is directed in the direction perpendicular to the row. Are preferably arranged.

  Alternatively, in the ion generation apparatus according to the first aspect and the second aspect of the present invention, the third electrode unit is configured by one bar-shaped electrode, and the first discharge needle and the second discharge needle are the one bar-shaped. On one side of the two sides of the electrode on at least one row defined to be parallel to the one rod-shaped electrode and to be parallel to the one rod-shaped electrode on the other side The first discharge needle and the second discharge needle are arranged on the same number of rows as the one side row, and the first discharge needle and the second discharge needle respectively have the axis of each discharge needle in the row. It is preferable that they are arranged alternately in a direction perpendicular to the columns.

  According to this, in any of the above, the third electrode portion is composed of a rod-shaped electrode, and the first discharge needle and the second discharge needle are located symmetrically with respect to the third electrode portion. Since they are arranged, the ease of flow of positive and negative air ions generated at the tips of the first and second discharge needles into the third electrode portion is uniform. Therefore, the amount of positive and negative air ions flowing into the third electrode portion more accurately reflects the balance between the generation amount of positive and negative air ions. Therefore, since the potential of the third electrode portion appropriately changes according to the production balance of air ions, the balance between the positive and negative air ion production amounts is appropriately adjusted to a predetermined desired balance. When the first discharge needle and the second discharge needle are arranged on a plurality of rows, for example, the first discharge needle and the second discharge needle are preferably arranged in a staggered arrangement. .

  Furthermore, in the ion generating apparatus according to the first and second aspects of the present invention, air for transporting positive and negative air ions generated at the tips of the first discharge needle and the second discharge needle to the charged body. Supply means for supplying, wherein the first discharge needle and the second discharge needle are alternately spaced apart from each other in a circumferential direction of a circle determined so that a central axis is oriented in the air supply direction by the supply means It is preferable that the third electrode portions are arranged on the center axis of the circle.

  According to this, the first discharge needle and the second discharge needle are alternately arranged at intervals in the circumferential direction of a circle determined so that the central axis is oriented in the air supply direction by the supply means. The third electrode portion is disposed on the center axis of the circle. Therefore, since the first discharge needle and the second discharge needle are disposed at positions symmetrical with respect to the third electrode portion, positive and negative air ions generated at the tips of the first and second discharge needles. The ease of flow into the third electrode portion is not biased. Therefore, the amount of positive and negative air ions flowing into the third electrode portion more accurately reflects the balance between the generation amount of positive and negative air ions. Therefore, since the potential of the third electrode portion appropriately changes according to the production balance of air ions, the balance between the positive and negative air ion production amounts is appropriately adjusted to a predetermined desired balance. Furthermore, since the positive and negative air ions are quickly conveyed to the charged body by the air supplied from the supply means, the charged body can be discharged efficiently.

  At this time, in the ion generation apparatus according to the first and second aspects of the present invention, the supply means supplies positive and negative air ions generated at the tips of the first discharge needle and the second discharge needle to the charged body. It is preferable that it is an air nozzle which ejects the compressed air for conveying. Alternatively, in the ion generation apparatus according to the first and second aspects of the present invention, the supply means conveys positive and negative air ions generated at the tips of the first discharge needle and the second discharge needle to a charged body. It is preferable that it is a fan which sends out the air for doing.

  According to this, the generated positive and negative air ions are quickly conveyed to the charged body by the compressed air ejected from the air nozzle or the air sent from the fan.

  Furthermore, in the ion generator of the first aspect and the second aspect of the present invention, it is preferable to include means for adjusting the position of the third electrode portion with respect to the first discharge needle and the second discharge needle.

  According to this, since the means for adjusting the position of the third electrode part with respect to the first discharge needle and the second discharge needle is provided, the position of the third electrode part can be easily adjusted. Therefore, for example, even after assembling the device, so as to compensate for the effects of assembly errors, etc., so that the potential of the third electrode unit changes more accurately reflecting the production balance of positive and negative air ions, The position of the third electrode part can be adjusted.

  An embodiment of the present invention will be described with reference to the accompanying drawings. First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory diagram showing an ion generator in the present embodiment, FIG. 2 is an explanatory diagram showing a circuit of a high voltage power source of the ion generator of FIG. 1, and FIG. 3 is an ion generator of FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. In addition, the ion generator in this embodiment is an ion generator concerning the 1st mode of the present invention.

  With reference to FIG. 1, the outline of the ion generator 1 in this embodiment is demonstrated. The ion generator 1 includes discharge electrode portions 8A and 10A each having a plurality of discharge needles 8 and 10, a high-voltage power source 1a that applies positive and negative DC high voltages to the discharge electrode portions 8A and 10A, and a discharge needle, respectively. 8 and 10 and a third electrode portion 14 provided to face each other.

  Each discharge needle 8 is made of a conductor and is electrically connected to each other by a connection line (not shown). These discharge needles 8 and connection lines that connect the discharge needles 8 to each other constitute a discharge electrode portion 8A. Similarly, each discharge needle 10 is made of a conductor and is electrically connected to each other by a connection line (not shown). A discharge electrode portion 10 </ b> A is configured by these discharge needles 10 and connection lines connecting the discharge needles 10 to each other. In the drawings of the present specification, the discharge needle 8 is shown in white and the discharge needle 10 is shown in black. The discharge needles 8 and 10 are supported by a support portion 18a formed of an insulator. Further, the third electrode portion 14 is made of a conductor, and is supported by the support portion 18a via an end end support member 19 and a lead end support member 20 formed of an insulator. The discharge electrode portions 8A and 10A, the third electrode portion 14, the support portion 18a, the end end support member 19, and the lead end support member 20 constitute a static elimination main body portion 17a. As shown in FIG. 1, when the charged body X is neutralized by the ion generator 1, the neutralizing body 17a is opposed to the charged body X at a certain distance (the discharge needles 8 and 10). The tip is made to face the charged body X).

  The high-voltage power supply 1a includes a DC power supply circuit 2 that outputs a constant DC voltage, a high-frequency oscillation circuit 3 that receives a DC voltage from the DC power supply circuit 2 and outputs a high-frequency voltage, and an output from the high-frequency oscillation circuit 3 is primary. The high-frequency transformer 4 connected to the side, and the positive and negative voltage doubler rectifier circuits 5 and 6 connected to the secondary side of the high-frequency transformer 4 and generating positive and negative DC high voltages, respectively. The output terminal 7 of the voltage doubler rectifier circuit 5 is connected to the discharge electrode part 8A via the connection line 7a, and the output terminal 9 of the voltage doubler rectifier circuit 6 is connected to the discharge electrode part 10A via the connection line 9a. Is done. The output terminal 7 is connected to the output terminal 9 via a series circuit in which the first resistor 11 and the second resistor 12 are connected in series. Furthermore, the terminal 13 of the connection part of the 1st resistance 11 and the 2nd resistance 12 is connected to the 3rd electrode part 14 via the connection line 13a. The predetermined resistance values of the first resistor 11 and the second resistor 12 are, for example, when the generation amounts of positive air ions and negative air ions due to corona discharge described later of the discharge needles 8 and 10 are equal. The potential of the third electrode portion 14 is determined in advance to be zero.

  Next, the high-voltage power supply 1a will be described in more detail with reference to FIG. Referring to FIG. 2, a DC power supply circuit 2 includes a diode, a resistor, and a capacitor for full-wave rectifying and smoothing an AC voltage, and converts an AC voltage input from a commercial power source into a DC voltage. Output. The high-frequency oscillation circuit 3 includes a coil, a capacitor, a diode, a resistor, and a transistor, and oscillates at a high frequency by self-excited oscillation when a DC voltage is applied from the DC power supply circuit 2. The circuit configurations of the DC power supply circuit 2 and the high-frequency oscillation circuit 3 are known configurations.

  Oscillation of the high-frequency oscillation circuit 3 causes a current to flow to the primary side of the high-frequency transformer 4 and generates a boosted voltage on the secondary side of the high-frequency transformer 4. The voltage generated on the secondary side of the high-frequency transformer 4 is input to the voltage doubler rectifier circuits 5 and 6 and further rectified and boosted.

  The voltage doubler rectifier circuits 5 and 6 have a well-known configuration called a Cockcroft-Walton circuit, and include a capacitor and a diode. The output terminals 7 and 9 of the voltage doubler rectifier circuits 5 and 6 have positive and negative constant DC high voltages that are a predetermined multiple of the input voltage according to the number of unit blocks in which capacitors and diodes are combined. Is obtained.

  According to the high-voltage power supply 1a, both positive and negative DC high voltages can be output using the common DC power supply circuit 2, the high-frequency oscillation circuit 3, and the high-frequency transformer 4. Therefore, the ion generating apparatus can be made smaller and lighter than a positive DC high-voltage power supply and a negative DC high-voltage power supply.

  The magnitude of the positive DC high voltage applied to the discharge electrode portion 8A (output voltage of the output terminal 7) and the magnitude of the negative DC high voltage applied to the discharge electrode portion 10A (output voltage of the output terminal 9). Is determined in advance to a predetermined constant value (for example, +5 kV, −5 kV).

  Next, the static elimination main body 17a will be described in more detail with reference to FIGS. Referring to FIGS. 3 and 4, the third electrode portion 14 is composed of one rod-shaped conductive core material. The support portion 18 a is a rod-shaped member and is provided so as to be parallel to the third electrode portion 14. An end end support member 19 and a lead end support member 20 are vertically suspended from both ends in the longitudinal direction of the support portion 18a. The lead end support member 20 is formed with a through hole 33 parallel to the support portion 18a. In the end end support member 19, similarly to the lead end support member 20, a through hole 34 (not shown) parallel to the support portion 18 a is formed coaxially with the through hole 33. One end of the third electrode portion 14 is inserted into the through hole 34 of the end end support member 19 and fixed to the end end support member 19, and the other end is inserted into the through hole 33 of the lead end support member 20. It is fixed to the lead end support member 20. The third electrode portion 14 is connected to the terminal 13 of the high-voltage power supply 1a via a connection line 13a extending from the end portion on the lead end support member 20 side.

  The discharge needles 8, 10 are on one side of both sides of the third electrode portion 14 on one row determined to be parallel to the third electrode portion 14 and on the other side the third electrode portion 14 is arranged on one row determined so as to be parallel to 14. Each of the two columns is a column that is equidistant from the third electrode portion 14. Furthermore, a plurality of (in this embodiment, two) discharge needles 8 are arranged in parallel to each other with the axis of each discharge needle 8 in the direction (vertical direction) perpendicular to the row. Are arranged at equal intervals. Further, in the row on the other side, the same number of discharge needles 10 as the discharge needles 8 are arranged at equal intervals in parallel to each other with the axis of each discharge needle 10 oriented in a direction (vertical direction) perpendicular to the row. Has been placed. At this time, the discharge needles 8 and 10 are arranged so that the discharge needles 8 and 10 are arranged in a staggered manner as illustrated in FIG. Therefore, when the static elimination main body 17a is viewed from the side, the discharge needles 8 and 10 are alternately arranged at equal intervals. In addition, the discharge needles 8 and 10 have base ends fixed to the support portion 18a.

  The discharge electrode portion 8A corresponds to the first discharge electrode portion of the present invention, the discharge needle 8 corresponds to the first discharge needle of the present invention, and the discharge electrode portion 10A corresponds to the second discharge electrode portion of the present invention. The discharge needle 10 corresponds to the second discharge needle of the present invention.

  Next, the operation (static elimination operation) of the ion generator 1 of the present embodiment will be described. First, when a positive direct-current high voltage is applied to the discharge electrode portion 8A, an electric field concentrated between the discharge electrode portion 8A and the third electrode portion 14 at the tip of the discharge needle 8 (from the tip of the discharge needle 8 to the first electrode). 3), and positive air ions are generated by corona discharge generated at the tip of the discharge needle 8 by this electric field. Further, when a negative DC high voltage is applied to the discharge electrode portion 10A, an electric field (discharging from the third electrode portion 14) is concentrated between the discharge electrode portion 10A and the third electrode portion 14 at the tip of the discharge needle 10. An electric field directed toward the tip of the needle 10 is formed, and negative air ions are generated by corona discharge generated at the tip of the discharge needle 10 by this electric field. Part of the generated positive and negative air ions is supplied to the charged body X, and the remaining part flows into the third electrode unit 14.

  At this time, for example, when the amount of positive air ions generated is larger than the amount of negative air ions generated, more positive air ions flow into the third electrode portion 14. That is, a positive current flows into the third electrode portion 14. Therefore, in addition to the current flowing from the discharge electrode portion 8A to the discharge electrode portion 10A via the first resistor 11 and the second resistor 12, the current flowing from the third electrode portion 14 to the discharge electrode portion 10A via the second resistor 12 Occurs. For this reason, since the electric current which flows through the 2nd resistance 12 becomes more than the electric current which flows through the 1st resistance 11, the electric potential of the 3rd electrode part 14 is biased to the positive side. When the potential of the third electrode portion 14 is biased to the positive side, the electric field concentrated on the tip of the discharge needle 8 formed between the discharge electrode portion 8A and the third electrode portion 14 is changed to the third electrode portion 14. It becomes weaker than before the potential of is biased. For this reason, since the production amount of positive air ions decreases, the production balance of air ions changes so that the production amounts of positive and negative air ions are equal.

  For example, when the amount of negative air ions generated is larger than the amount of positive air ions generated, more negative air ions flow into the third electrode portion 14. That is, a negative current flows into the third electrode portion 14. Therefore, in addition to the current that flows from the discharge electrode portion 8A to the discharge electrode portion 10A via the first resistor 11 and the second resistor 12, the negative current that flows from the third electrode portion 14 to the discharge electrode portion 8A via the first resistor 11 Current (current flowing from the discharge electrode portion 8A to the third electrode portion 14) occurs. For this reason, since the electric current which flows through the 1st resistance 11 becomes more than the electric current which flows through the 2nd resistance 12, the electric potential of the 3rd electrode part 14 is biased to the negative side. When the potential of the third electrode portion 14 is biased to the negative side, the electric field concentrated on the tip of the discharge needle 10 formed between the discharge electrode portion 10A and the third electrode portion 14 is changed to the third electrode portion 14. It becomes weaker than before the potential of is biased. For this reason, since the production amount of negative air ions decreases, the production balance of air ions changes so that the production amounts of positive and negative air ions are equal.

  As described above, the balance between the generation amounts of positive and negative air ions is automatically adjusted to a desired balance, and positive and negative air ions are generated. Then, the generated positive and negative air ions move toward the charged body X, the charge of the charged body X is neutralized, and static elimination is performed.

  According to the ion generation apparatus of the present embodiment, for example, even if the operation of the apparatus is continued and the balance characteristic of the generation amount of positive and negative air ions changes due to the contamination of the discharge needle or the like, the air ions Is appropriately self-adjusted to a preset desired balance. Therefore, the balance between the positive and negative air ion production amounts can be adjusted stably and with a simple configuration, regardless of the operating state of the apparatus. At this time, since the discharge needles 8 and 10 are arranged at symmetrical positions with respect to the third electrode portion 14, positive and negative air ions generated by corona discharge at the tips of the discharge needles 8 and 10, respectively. The ease of flow into the third electrode portion 14 is not biased. Therefore, the amount of positive and negative air ions flowing into the third electrode portion 14 more accurately reflects the balance between the generation amounts of positive and negative air ions. Accordingly, since the potential of the third electrode portion 14 appropriately changes according to the air ion generation balance, the balance between the positive and negative air ion generation amounts is appropriately adjusted to a predetermined desired balance.

  In the present embodiment, the rows where the discharge needles 8 and 10 are arranged on both sides of the third electrode portion 14 are determined one by one on each side of the third electrode portion 14. As a modified example, a plurality of rows (two in FIG. 16) may be defined on each side of the third electrode portion 14 as shown in FIG. 16, for example, as shown in FIG. .

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory diagram showing a circuit of a high-voltage power supply of the ion generator in the present embodiment. In addition, this embodiment uses the high voltage power supply 1b instead of the high voltage power supply 1a in the first embodiment, and is an ion generating apparatus according to the second aspect of the present invention. The high-voltage power supply 1b has only a configuration relating to a portion connecting the output terminal 7 of the voltage doubler rectifier circuit 5 and the output terminal 9 of the voltage doubler rectifier circuit 6 via a resistor and a portion connecting the third electrode portion 14. However, it is different from the high-voltage power supply 1a.

  Referring to FIG. 5, in high voltage power supply 1b, output terminal 7 of voltage doubler rectifier circuit 5 and output terminal 9 of voltage doubler rectifier circuit 6 have a first resistance 11 having a predetermined resistance value and a variable resistance value. The third resistor 15 and the second resistor 12 having a predetermined resistance value are connected via a series circuit formed by connecting them in series.

  The third resistor 15 has three terminals 16a to 16c, the first terminal 16a is connected to the first resistor 11, the second terminal 16b is connected to the second resistor 12, and the third terminal 16c is a third electrode. Connected to the unit 14. Between the first terminal 16a and the second terminal 16b of the third resistor 15, there is a predetermined resistance value R, and the third terminal 16c determines the resistance value R and the resistance value R1 on the first terminal 16a side and the second resistance value R1. It is divided into a resistance value R2 on the terminal 16b side (R = R1 + R2). At this time, the ratio between the resistance value R1 and the resistance value R2 can be variably set. That is, between the discharge electrode portion 8A and the third electrode portion 14, a variable resistance value is obtained by combining the resistance value of the first resistor 11 and the resistance value R1. Further, between the discharge electrode portion 10 </ b> A and the third electrode portion 14, a variable resistance value is obtained by combining the resistance value of the second resistor 12 and the resistance value R <b> 2 of the third resistor 15.

  At this time, the resistance value between the discharge electrode portion 8A and the third electrode portion 14 and the resistance value between the discharge electrode portion 10A and the third electrode portion 14 are, for example, positive air ions and negative air ions. Is set so that the potential of the third electrode portion 14 becomes zero. The configuration other than that described above is the same as that of the first embodiment.

  According to the ion generating apparatus of the present embodiment, the same effect as that of the first embodiment can be obtained, and further, the first discharge electrode portion 8A and the third electrode can be changed by changing the setting of the third resistor 15. The resistance value between the second electrode part 14 and the resistance value between the second discharge electrode part 10A and the third electrode part 14 can be adjusted. For example, even after the device is assembled, the third electrode part 14 Can be easily adjusted. For this reason, the electric potential of the 3rd electrode part 14 can be set easily so that the production | generation balance of air ion may be self-adjusted to the desired balance.

  In the present embodiment, the rows where the discharge needles 8 and 10 are arranged on both sides of the third electrode portion 14 are determined one by one on each side of the third electrode portion 14. As a modified example, a plurality of rows in which the discharge needles 8 and 10 are arranged may be determined on each side of the third electrode portion 14 (see, for example, FIG. 16).

  Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a plan view of the static elimination main body portion of the ion generating apparatus according to the present embodiment as seen from the lower surface, and FIG. 7 is a sectional view taken along line VII-VII in FIG. In addition, this embodiment uses the static elimination main-body part 17b instead of the static elimination main-body part 17a in 1st Embodiment. The static elimination main body portion 17b is different from the static elimination main body portion 17a only in the arrangement of the third electrode portions 14 and 14, the support portion 18b, and the discharge needles 8 and 10.

  With reference to FIGS. 6 and 7, the ion generating apparatus according to the present embodiment includes two third electrode portions 14 and 14 each formed of a rod-shaped conductive core material arranged in parallel to each other. The support portion 18b formed of an insulator is a rod-shaped member and is provided so as to be parallel to the third electrode portions 14 and 14. An end-end support member 21 and a lead-end support member 22 formed of an insulator are vertically suspended from both ends in the longitudinal direction of the support portion 18b. The lead end support member 22 is formed with a pair of through holes 35 and 35 parallel to the support portion 18b. As with the lead end support member 22, a pair of through holes 36 and 36 (not shown) parallel to the support portion 18 b are formed on the end end support member 21 coaxially with the through holes 35 and 35, respectively. Has been.

  One end of each of the third electrode portions 14 and 14 is inserted into each of the through holes 36 and 36 of the end end support member 21 and fixed to the end end support member 21, and the other end is supported by the lead end. The lead end support member 22 is fixedly inserted into the through holes 35 of the member 22. Further, the end portions of the third electrode portions 14 and 14 on the lead end support member 22 side are connected (short-circuited) to a conductive connection member 23 fixed to the lead end support member 22. And it is connected to the terminal 13 of the high-voltage power supply 1a through a connection line 13a extending from the connection member 23.

  The discharge needles 8 and 10 are arranged on one row defined between the third electrode portions 14 and 14 so as to be parallel to the third electrode portions 14 and 14. The one row is a row that is equidistant from the third electrode portions 14 and 14. In one row, a plurality of (two in this embodiment) discharge needles 8 and the same number of discharge needles 10 as the discharge needles 8 are arranged in a direction perpendicular to the axis of the discharge needles 8 and 10. In the (up and down direction), they are arranged in parallel with each other at equal intervals. The discharge electrode portions 8A and 10A, the third electrode portion 14, the support portion 18b, the end end support member 21, the lead end support member 22, and the connection member 23 constitute a static elimination main body portion 17b. In addition, the discharge needles 8 and 10 each have a base end portion fixed to the support portion 18b. The discharge needle 8 is conducted to the output terminal 7 through the connection line 7a, and the discharge needle 10 is conducted to the output terminal 9 through the connection line 9a. The configuration other than that described above is the same as that of the first embodiment.

  According to the ion generating apparatus of the present embodiment, the discharge needles 8 and 10 of the static elimination main body portion 17b are disposed at symmetrical positions with respect to the third electrode portions 14 and 14, and thus the same as in the first embodiment. In addition, the ease with which positive and negative air ions respectively generated by corona discharge at the tips of the discharge needles 8 and 10 flow into the third electrode portions 14 and 14 is not biased. Therefore, the amount of positive and negative air ions flowing into the third electrode portion 14 more accurately reflects the balance between the generation amounts of positive and negative air ions. Accordingly, since the potential of the third electrode portion 14 appropriately changes according to the air ion generation balance, the balance between the positive and negative air ion generation amounts is appropriately adjusted, and the same effect as in the first embodiment can be obtained. Play.

  As a modification of the present embodiment, the same high voltage power supply 1b as that of the second embodiment may be used instead of the high voltage power supply 1a. In this case, the third electrode portions 14 and 14 are connected to the terminal 16c of the high-voltage power supply 1b via the connection line 13a extending from the connection member 23.

  Next, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a plan view of the static elimination main body portion of the ion generation apparatus according to the present embodiment as viewed from the lower surface, and FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. In addition, this embodiment uses the static elimination main-body part 17c instead of the static elimination main-body part 17a in 1st Embodiment. The static elimination main body portion 17c is different from the static elimination main body portion 17a only in the arrangement of the discharge needles 8 and 10.

  Referring to FIG. 8, the discharge needles 8, 10 are arranged on one side of the third electrode portion 14 on one side determined to be parallel to the third electrode portion 14 and on the other side. Is arranged on one row determined so as to be parallel to the third electrode portion 14 on the side. The two rows are arranged so as to be equidistant from the third electrode portion 14, respectively. In each of the two rows, a plurality of (two in this embodiment) discharge needles 8 and the same number of discharge needles 10 as the discharge needles 8 are orthogonal to the axis of each of the discharge needles 8 and 10. In this direction (vertical direction), they are arranged in parallel with each other at regular intervals. At this time, as illustrated in FIG. 8, the discharge needles 8 and 10 are arranged such that the discharge needles 8 and the discharge needles 10 are arranged in a staggered manner. Accordingly, when the static elimination main body portion 17c is viewed from the side, the discharge needles 8 and the discharge needles 10 (the discharge needles 8 and 10 arranged in parallel in the transverse direction of the support portion 18a) overlap with each other. On one side of the electrode part 14, the discharge needles 8 and the discharge needles 10 are alternately arranged at equal intervals. The discharge electrode portions 8A and 10A, the third electrode portion 14, the support portion 18a, the lead end support member 19, and the end end support member 20 constitute a static elimination main body portion 17c.

  Further, referring to FIG. 9, the discharge needles 8 and 10 have their base ends fixed to the support portion 18 c. The discharge needle 8 is conducted to the output terminal 7 through the connection line 7a, and the discharge needle 10 is conducted to the output terminal 9 through the connection line 9a. The configuration other than that described above is the same as that of the first embodiment.

  According to the ion generating apparatus of the present embodiment, since the discharge needles 8 and 10 of the static elimination main body portion 17c are arranged at symmetrical positions with respect to the third electrode portion 14, as in the first embodiment, The ease with which positive and negative air ions respectively generated by corona discharge at the tips of the discharge needles 8 and 10 flow into the third electrode portion 14 is not biased. Therefore, the amount of positive and negative air ions flowing into the third electrode portion 14 more accurately reflects the balance between the generation amounts of positive and negative air ions. Accordingly, since the potential of the third electrode portion 14 appropriately changes according to the air ion generation balance, the balance of the positive and negative air ion generation amounts is appropriately adjusted to a predetermined desired balance, and the first The same effects as those of the first embodiment are obtained.

  In the present embodiment, the rows where the discharge needles 8 and 10 are arranged on both sides of the third electrode portion 14 are determined one by one on each side of the third electrode portion 14. As a modified example, a plurality of rows in which the discharge needles 8 and 10 are arranged may be determined on each side of the third electrode portion 14.

  As a modification of the present embodiment, the same high voltage power supply 1b as that of the second embodiment may be used instead of the high voltage power supply 1a. In this case, the third electrode portion 14 is connected to the terminal 16c of the high-voltage power supply 1b via the connection line 13a.

  Next, a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a plan view of the static elimination main body portion of the ion generation apparatus according to the present embodiment as seen from the lower surface, and FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. In the present embodiment, positive and negative air ions respectively generated by corona discharge at the tips of the discharge needles 8 and 10 are transferred to the charged body X in place of the static elimination main body portion 17a in the first embodiment. The structure (air nozzle type static elimination main body part 17d) provided with an air nozzle that ejects compressed air is used.

  With reference to FIGS. 10 and 11, the neutralization main body portion 17 d of the ion generating apparatus in the present embodiment is provided with a cylindrical nozzle case 24. Inside the nozzle case 24, a disk-like support portion 25 formed of an insulator is provided so as to be coaxial with the central axis of the nozzle case 24. The support portion 25 is fixed in contact with the outer peripheral surface of the support portion 25 and the inner wall surface of the nozzle case 24.

  The third electrode portion 14 is a spherical conductive member, and is fixed to one end of a rod-shaped conductive member 37. The other end of the rod-shaped conductive member 37 is fixed to the support portion 25. The rod-shaped member 37 is provided coaxially with the central axis of the nozzle case 24, and the third electrode portion 14 is disposed on the central axis of the nozzle case 24. The 3rd electrode part 14 is connected to the terminal 13 of the high voltage power supply 1a through the connection line 13a extended from the edge part by the side of the support part 25 of the rod-shaped electroconductive member 37. As shown in FIG.

  The discharge needles 8 and 10 are arranged on the support portion 25 in the circumferential direction of a circle α determined so that the central axis is oriented in the axial direction of the nozzle case 24. In the present embodiment, each one discharge needle 8, 10 is opposed across the center of the circle α, and the axis of each discharge needle 8, 10 is oriented in a direction parallel to the central axis of the nozzle case 24. It is arranged on the circumference of the circle α. Therefore, the discharge needle 8 and the discharge needle 10 are arranged at an interval of 180 ° in the circumferential direction of the circle α. In addition, the discharge needles 8 and 10 have their base ends fixed to the support portion 25. At this time, the tips of the discharge needles 8 and 10 and the third electrode portion 14 are on the same side with respect to the support portion 25 (the front side of the support portion 25). The discharge needle 8 is conducted to the output terminal 7 through the connection line 7a, and the discharge needle 10 is conducted to the output terminal 9 through the connection line 9a.

  Further, an air ion chamber 28 is formed on the front side of the support portion 25 in the nozzle case 24. In addition, an air outlet 26 that is a through hole provided in a direction parallel to the central axis of the nozzle case 24 at a portion of the support portion 25 where the discharge needles 8 and 10 and the third electrode portion 14 are not disposed. Is provided. A cylindrical air tube (air nozzle) 27 is provided coaxially with the central axis of the air outlet 26 on the back side of the support portion 25 in the nozzle case 24. An end portion of the air tube 27 on the support portion 25 side is fixed to the support portion 25 and communicates with the air ejection port 26 and the air ion chamber 28.

  Then, compressed air is supplied to the air pipe 27 from a compressor or the like (not shown), and this compressed air is ejected into the air ion chamber 28 via the air pipe 27 and the air ejection port 26. With this compressed air, positive and negative air ions respectively generated by corona discharge at the tips of the discharge needles 8 and 10 are conveyed to the charged body X. The configuration other than that described above is the same as that of the first embodiment.

  According to the ion generating apparatus of the present embodiment, the discharge needles 8 and 10 of the static elimination main body portion 17d are arranged at symmetrical positions with respect to the third electrode portion 14, and therefore at the tips of the discharge needles 8 and 10. The ease with which the positive and negative air ions generated by the corona discharge flow into the third electrode portion 14 is not biased. Therefore, the amount of positive and negative air ions flowing into the third electrode portion 14 more accurately reflects the balance between the generation amounts of positive and negative air ions. Accordingly, since the potential of the third electrode portion 14 appropriately changes according to the air ion generation balance, the balance of the positive and negative air ion generation amounts is appropriately adjusted to a predetermined desired balance, and the first The same effects as those of the first embodiment are obtained. Furthermore, according to the ion generating apparatus of the present embodiment, positive and negative air ions are rapidly conveyed to the charged body X by the compressed air supplied through the air pipe 27, so that the charged body X can be efficiently used. Static elimination can be performed.

  In the present embodiment, each one discharge needle 8, 10 is arranged, but as a modification of the present embodiment, a plurality of discharge needles 8, 10 having the same number are arranged in the circumferential direction of the circle α. It is good also as what is arrange | positioned so that it may line up alternately at equal intervals.

  As a modification of the present embodiment, the same high voltage power supply 1b as that of the second embodiment may be used instead of the high voltage power supply 1a. In this case, the third electrode portion 14 is connected to the terminal 16c of the high-voltage power supply 1b via the connection line 13a.

  Next, a sixth embodiment of the present invention will be described with reference to FIGS. FIG. 12 is a plan view of the static elimination main body portion of the ion generating apparatus according to the present embodiment as viewed from the lower surface, and FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. In the present embodiment, positive and negative air ions respectively generated by corona discharge at the tips of the discharge needles 8 and 10 are transferred to the charged body X in place of the static elimination main body portion 17a in the first embodiment. The structure (blower type static elimination main body part 17e) provided with the fan (blower) which sends out the air is used.

  With reference to FIGS. 12 and 13, the static elimination main body portion 17 e of the ion generating apparatus in the present embodiment is provided with a cylindrical case 29 having a square cross section. Inside the case 29, a square flat plate-shaped support portion 30 formed of an insulator is provided so as to be coaxial with the central axis of the case 29. The support portion 30 is fixed in contact with the outer peripheral surface of the support portion 30 and the inner wall surface of the case 29.

  The third electrode portion 14 is a spherical conductive member, and is fixed to one end of a rod-shaped conductive member 37. The other end of the rod-shaped member 37 is fixed to the support portion 30. The rod-shaped member 37 is provided coaxially with the central axis of the case 29, and the third electrode portion 14 is disposed on the central axis of the case 29. The third electrode portion 14 is connected to the terminal 13 of the high-voltage power supply 1a via a connection line 13a extending from the end portion of the rod-shaped conductive member 37 on the support portion 30 side.

  The discharge needles 8 and 10 are arranged on the support portion 30 in the circumferential direction of a circle β determined so that the central axis is oriented in the axial direction of the case 29. In the present embodiment, the two discharge needles 8 and 10 face each other with the center of the circle β interposed therebetween, and the axis of each discharge needle 8 and 10 faces the direction parallel to the central axis of the case 29. It is arranged on the circumference of β. Accordingly, the discharge needles 8 and the discharge needles 10 are alternately arranged at equal intervals in the circumferential direction of the circle β. In addition, the discharge needles 8 and 10 each have a base end portion fixed to the support portion 30. At this time, the tips of the discharge needles 8 and 10 and the third electrode portion 14 are on the same side (the front side of the support portion 30) with respect to the support portion 30 in the case 29. The discharge needle 8 is conducted to the output terminal 7 through the connection line 7a, and the discharge needle 10 is conducted to the output terminal 9 through the connection line 9a.

  Further, an air ion chamber 32 is formed on the front surface side of the support portion 30 in the case 29. Further, on the back side of the support portion 30 in the case 29, the fan 31 that is rotationally driven by the electric motor 31 a has its rotation axis coaxial with the center axis of the case 29 and is spaced from the support portion 30. Attached to the case 29. Further, a plurality of fan-shaped (four in this embodiment) opening holes 38 are provided in a portion of the support portion 30 where the discharge needles 8 and 10 and the third electrode portion 14 are not disposed. Through the opening hole 38, the back surface side of the support portion 30 in the case 29 and the air ion chamber 32 formed on the front surface side of the support portion 30 communicate with each other.

  Then, air sent from the fan 31 through the opening hole 38 of the support portion 30 is supplied to the air ion chamber 32. By this air, positive and negative air ions respectively generated by corona discharge at the tips of the discharge needles 8 and 10 are conveyed to the charged body X. The configuration other than that described above is the same as that of the first embodiment.

  According to the ion generating apparatus of the present embodiment, the discharge needles 8 and 10 of the static elimination main body portion 17e are disposed at symmetrical positions with respect to the third electrode portion 14, and therefore at the tips of the discharge needles 8 and 10. The ease with which the positive and negative air ions generated by the corona discharge flow into the third electrode portion 14 is not biased. Therefore, the amount of positive and negative air ions flowing into the third electrode portion 14 more accurately reflects the balance between the generation amounts of positive and negative air ions. Accordingly, since the potential of the third electrode portion 14 appropriately changes according to the air ion generation balance, the balance of the positive and negative air ion generation amounts is appropriately adjusted to a predetermined desired balance, and the first The same effects as those of the first embodiment are obtained. Furthermore, according to the ion generating apparatus of the present embodiment, the positive and negative air ions are quickly conveyed to the charged body X by the air supplied by the fan 31, so that the charged body X can be neutralized efficiently. Can do.

  In the present embodiment, each of the two discharge needles 8 and 10 is arranged. However, as a modification of the present embodiment, each one of the discharge needles 8 and 10 or each of three or more discharge needles. 8, 10 may be arranged alternately at equal intervals in the circumferential direction of the circle β.

  As a modification of the present embodiment, the same high voltage power supply 1b as that of the second embodiment may be used instead of the high voltage power supply 1a. In this case, the third electrode portion 14 is connected to the terminal 16c of the high-voltage power supply 1b through the connection line 13a.

  Next, a seventh embodiment of the present invention will be described with reference to FIG. FIG. 14 is a cross-sectional view of the static elimination main body portion of the ion generating apparatus in the present embodiment. In addition, this embodiment uses the static elimination main-body part 17f provided with the means to adjust the position with respect to the discharge needles 8 and 10 of the 3rd electrode part 14 instead of the static elimination main-body part 17a in 1st Embodiment. is there.

  Referring to FIG. 14, in the lead end support member 20 of the ion generating apparatus in the present embodiment, a through hole 33 f (long hole) elongated in a direction perpendicular to the discharge needles 8 and 10 is parallel to the support portion 18 a. Is formed. Note that, similarly to the lead end support member 20, the end end support member 19 is also formed with a through hole 34f (not shown) parallel to the support portion 18a coaxially with the through hole 33f. One end of the third electrode portion 14 is inserted into the through hole 34 f of the end end support member 19, and the other end is inserted into the through hole 33 f of the lead end support member 20. The third electrode portion 14 is supported in parallel with the support portion 18a, with a part of the outer periphery of the conductive core member in contact with the inner wall surfaces of the through holes 33f and 34f. At this time, the third electrode portion 14 can move in a direction perpendicular to the discharge needles 8 and 10 along the through holes 33f and 34f while maintaining a state parallel to the support portion 18a, and the through holes 33f and 34f. It can be fixed to the support portion 18a with a screw or the like (not shown) at an arbitrary position. Thereby, the position of the third electrode portion 14 with respect to the discharge needles 8 and 10 is adjusted. The configuration other than that described above is the same as that of the first embodiment.

  According to the ion generating apparatus of the present embodiment, the same effects as those of the first embodiment can be obtained, and further, means for adjusting the position of the third electrode portion 14 with respect to the discharge needles 8 and 10 is provided. As a result, the position of the third electrode portion 14 can be easily adjusted. Therefore, for example, even after the device is assembled, the potential of the third electrode unit 14 is changed to more accurately reflect the production balance of positive and negative air ions by compensating for the effects of assembly errors and the like. The position of the third electrode portion 14 can be adjusted (so that the ion balance is adjusted to a desired ion balance).

  In addition, as a modification of the present embodiment, in any of the second to sixth embodiments and the modification thereof, a means for adjusting the position of the third electrode portion 14 may be provided.

  Next, the test of the static elimination performance of the ion generator of the present invention will be described with reference to FIGS. FIG. 15 is an explanatory view showing a test apparatus for testing static elimination performance and an ion generator of the present invention (hereinafter referred to as an example apparatus), and FIG. 16 is a bottom view of the static elimination main body of the example apparatus of FIG. It is the top view seen from. As an example apparatus, an ion generation apparatus according to a modification of the first embodiment of the present invention is used. The apparatus according to the first embodiment of the present invention is only that two rows on each side of the third electrode portion 14 are defined on each side of the third electrode portion 14 on both sides of the third electrode portion 14. It differs from the form. Further, as a comparative example device, in the example device, the output terminal 7 and the output terminal 9 are not connected via the first resistor 11 and the second resistor 12, and the third electrode portion 14 is not provided. A conventional DC corona discharge type ion generator is used.

  In the practical example apparatus, as described above in the first embodiment, referring to FIG. 16, the discharge needles 8 and 10 are connected to the third electrode portion 14 on one side of the third electrode portion 14. They are disposed on two rows determined to be parallel and on two rows determined to be parallel to the third electrode portion 14 on the other side. Each row is arranged with an interval of 30 mm. In the two rows on one side, the two discharge needles 8 are respectively arranged with an interval of 100 mm. The total number of discharge needles 8 including the two rows of discharge needles 8 are arranged at equal intervals in the axial direction of the third electrode portion 14. Further, in the two rows on the other side, the two discharge needles 10 are arranged at an interval of 100 mm from each other. The total number of discharge needles 10 including the two rows of discharge needles 10 is arranged at equal intervals in the axial direction of the third electrode portion 14. The configuration other than that described above is the same as that of the first embodiment. The resistance values of the first resistor 11 and the second resistor 12 were both 200 MΩ.

  Next, the test apparatus used for the test will be described with reference to FIG. As a test apparatus, a charged plate monitor A is used. The charging plate monitor A measures the decay time and ion balance of the charging voltage, and a 150 mm square metal plate (charging body) b is attached to the main body a via an insulator c. The metal plate b simulates the charged body X to be neutralized. Further, the main body a includes a high-voltage power source e for applying a charge to the metal plate b, a surface potential measuring device d for measuring the voltage of the metal plate b, and a timer f for measuring the decay time of the voltage of the metal plate b. And built-in.

  In the test, a static elimination main body is installed at a distance of L (mm) from the upper surface of the metal plate b of the charged plate monitor A, and positive and negative air ions generated by the static elimination main body are applied to the metal plate b. Supply. Then, the metal plate b is charged to a predetermined initial charging voltage by the high-voltage power source e, and air ions are supplied to the metal plate b to neutralize the charge, and the decay time required to reduce the charging voltage to the predetermined charging voltage is measured. . At this time, if the positive and negative ions in the air are biased, either positive or negative charge is accumulated on the metal plate b, and the absolute value of the voltage increases. This voltage is called an offset voltage V0 and serves as an index of ion balance. The offset voltage V0 is measured by the charging plate monitor A.

  As test conditions, the distance L from the tip of the discharge needle to the metal plate b was 300 mm in both the example device and the comparative example device. The high voltage power source outputs a DC high voltage of ± 5 kV. Then, as the charge removal characteristics, the time for the charging voltage of the metal plate b to decay from + 1,000V to + 100V and the time for the decay from −1,000V to −100V were measured. Further, as an ion balance characteristic, the offset voltage of the metal plate b at the steady state was measured.

  The test results are shown in Table 1. In this result, since the ion balance is not taken in the comparative example device, the decay of the positive charge is fast and the decay of the negative charge is slow, and the offset voltage V0 is negatively biased to −50V. On the other hand, in the example device, the decay times of the positive and negative charges are close to each other, and the offset voltage V0 is −5V, which is close to 0. Thereby, it turns out that the ion balance is taken in the Example apparatus. Therefore, it can be seen that the present invention can provide an ion generating apparatus capable of obtaining a good ion balance.

Explanatory drawing which shows the ion generator in 1st Embodiment of this invention. Explanatory drawing which shows the circuit of the high voltage power supply of the ion generator of FIG. The top view which looked at the static elimination main body part of the ion generator of FIG. 1 from the lower surface. IV-IV sectional view taken on the line of FIG. Explanatory drawing which shows the circuit of the high voltage power supply of the ion generator in 2nd Embodiment of this invention. The top view which looked at the static elimination main-body part of the ion generator in 3rd Embodiment of this invention from the lower surface. VII-VII sectional view taken on the line of FIG. The top view which looked at the static elimination main-body part of the ion generator in 4th Embodiment of this invention from the lower surface. IX-IX sectional view taken on the line of FIG. The top view which looked at the static elimination main-body part of the ion generator in 5th Embodiment of this invention from the lower surface. XI-XI sectional view taken on the line of FIG. The top view which looked at the static elimination main-body part of the ion generator in 6th Embodiment of this invention from the lower surface. XIII-XIII sectional view taken on the line of FIG. The cross-sectional view of the static elimination main-body part of the ion generator in 7th Embodiment of this invention. Explanatory drawing which shows the test apparatus for testing the static elimination performance by the ion generator of this invention, and an Example apparatus. The top view which looked at the static elimination main-body part of the Example apparatus of FIG. 15 from the lower surface.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Ion production apparatus, 1a, 1b ... High voltage power supply, 8, 10 ... Discharge needle, 8A, 10A ... Discharge electrode part, 11 ... 1st resistance, 12 ... 2nd resistance, 14 ... 3rd electrode part, 15 ... 1st 3 resistance, 27 ... air pipe (air nozzle), 31 ... fan.

Claims (9)

A pair of insulated discharge electrode portions having a discharge needle made of a conductor, a first discharge electrode portion that is one of the pair of discharge electrode portions, and a first one that is the other of the pair of discharge electrode portions A first discharge needle that is a discharge needle of the first discharge electrode unit by applying the positive and negative DC high voltage to each of the two discharge electrode units; And an ion generator that generates positive and negative air ions by corona discharge generated at the tip of the second discharge needle that is the discharge needle of the second discharge electrode part,
A third electrode portion made of a conductor insulated from the first and second discharge electrode portions and facing the first and second discharge needles, the first discharge electrode portion and the second discharge electrode; A first resistor having a predetermined resistance value and a second resistor having a predetermined resistance value connected in series, and connected to a connection portion between the first resistor and the second resistor, An ion generating apparatus, wherein the third electrode portion is connected. A pair of insulated discharge electrode portions having a discharge needle made of a conductor, a first discharge electrode portion that is one of the pair of discharge electrode portions, and a first one that is the other of the pair of discharge electrode portions A first discharge needle that is a discharge needle of the first discharge electrode unit by applying the positive and negative DC high voltage to each of the two discharge electrode units; And an ion generator that generates positive and negative air ions by corona discharge generated at the tip of the second discharge needle that is the discharge needle of the second discharge electrode part,
A third electrode portion made of a conductor provided so as to be insulated from the first and second discharge electrode portions and opposed to the first and second discharge needles, the first discharge electrode portion and the second discharge electrode; An ion generating device, wherein the first electrode portion is connected to the third electrode portion via a resistance having a variable resistance value. The third electrode part is composed of two rod-like electrodes arranged in parallel to each other,
The first discharge needle and the second discharge needle are disposed on one row defined between the two rod-shaped electrodes so as to be parallel to the two rod-shaped electrodes. The first discharge needles and the second discharge needles are arranged so as to be alternately arranged with the axial centers of the discharge needles oriented in a direction perpendicular to the columns. The ion generator of Claim 1 or Claim 2. The third electrode portion is composed of one rod-shaped electrode,
The first discharge needle and the second discharge needle are on one side of both sides of the one rod-shaped electrode, on at least one row defined to be parallel to the one rod-shaped electrode; It is arranged on the same number of columns as the one side column, which is determined to be parallel to the one rod-shaped electrode on the other side. Two or more first discharge needles are arranged with the axis of each discharge needle oriented in a direction perpendicular to the row, and the other side row has one or more second discharge needles, respectively. 3. The ion generating apparatus according to claim 1, wherein the discharge needles are arranged such that the axis of each discharge needle is oriented in a direction orthogonal to the row. The third electrode portion is composed of one rod-shaped electrode,
The first discharge needle and the second discharge needle are on one side of both sides of the one rod-shaped electrode, on at least one row defined to be parallel to the one rod-shaped electrode; The first discharge needle is disposed on the same number of rows as the one side row, which is defined to be parallel to the one rod-shaped electrode on the other side. 3. The ion generating device according to claim 1, wherein the second discharge needles and the second discharge needles are arranged so that the axial centers of the discharge needles are alternately arranged in a direction orthogonal to the row. . Supply means for supplying air for conveying positive and negative air ions generated at the tips of the first discharge needle and the second discharge needle to a charged body;
The first discharge needles and the second discharge needles are arranged so as to be alternately arranged at intervals in a circumferential direction of a circle determined so that a central axis faces a supply direction of air by the supply unit, The ion generation apparatus according to claim 1, wherein the third electrode unit is disposed on a central axis of the circle.   The supply means is an air nozzle that ejects compressed air for conveying positive and negative air ions generated at the tips of the first discharge needle and the second discharge needle to a charged body. Item 7. The ion generator according to Item 6.   The said supply means is a fan which sends out the air for conveying the positive and negative air ion produced | generated by the front-end | tip of the said 1st discharge needle and the 2nd discharge needle to a charging body. The ion generator of description.   The ion generating apparatus according to any one of claims 3 to 8, further comprising means for adjusting a position of the third electrode portion with respect to the first discharge needle and the second discharge needle.

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