JP2009099472A - Blast type ion generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blast type ion generating device that can lead to miniaturization and weight reduction of a whole of the device and smoothly generate air flow by which air ions are transferred. <P>SOLUTION: An alternating-current high-voltage supply 4 placed in a housing 2 provided with an air inlet 6 and an air outlet 7 on a first wall surface 2b and a second wall surface 2a, respectively, is configured to arrange a coil transformer 16 and a pulse generation circuit 17 in juxtaposition, the transformer 16 having a secondary winding 16b connected to a high-voltage application part of a corona discharge generation electrode member 3 facing the air outlet 7 via a high-voltage cable 15, the pulse generation circuit 17 alternately and periodically providing a primary winding 16a of the coil transformer 16 with a pulse train voltage composed of a train of positive pulses and another pulse train voltage composed of a train of negative pulses, and is placed in a position of the housing 2 in which air flow is prevented from going from the air inlet 6 to the air outlet 7. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a blower ion generator that generates air ions by corona discharge in the air and transfers the air ions by an air flow.

  An air inlet and an air outlet are opened on the outer wall surface of the housing, and a corona discharge generating electrode member having a discharge needle or the like is arranged facing the air outlet, so that the corona in the corona discharge generating electrode member is arranged. Air ions generated by electrical discharge (aerial corona discharge) are introduced into the housing from the air inlet by a blower such as a fan, and transferred to the front of the air outlet by the flow of air blown from the air outlet. A blower-type ion generator configured to do so has been conventionally known. The blower-type ion generator is generally used for neutralizing a charged object, and discharges the charged object by blowing an air flow containing positive and negative air ions to the charged object.

  In this type of blown ion generator, a corona discharge is usually generated from a discharge needle or the like by applying an AC high voltage from an AC high voltage power source to a voltage application portion of an electrode member for generating a corona discharge, thereby generating positive and negative air. Ions are generated.

  In this case, in a conventional blow type ion generator, a winding transformer having a primary winding to which an AC voltage of a commercial frequency (50 Hz or 60 Hz) is input from a commercial power source is generally used as an AC high voltage power source.

  However, since the AC high-voltage power supply composed of such a commercial-frequency winding transformer is large and heavy, it is difficult to reduce the size and weight of the blower ion generator in which it is housed. There is an inconvenience that it becomes. Further, since the volume occupied by the AC high-voltage power supply is relatively large in the housing, the air introduced from the air inlet into the housing is obstructed by the AC high-voltage power source, and does not flow smoothly toward the air outlet. It will be a thing. As a result, the air blown out from the air blowing port may become non-uniform or turbulent flow may occur, and as a result, the generated air ions can be supplied smoothly and efficiently to charged objects. There was an inconvenience that some cases were impossible.

  For this reason, in recent years, a compact and lightweight high-frequency power source using a high-frequency transformer or a piezoelectric transformer has been used as an AC high-voltage power source (see, for example, Patent Documents 1 and 2).

However, the high-frequency power source generally cannot increase the output current so much, and since a high frequency of several tens of kHz is used, current loss due to stray capacitance tends to increase. For this reason, there are disadvantages that the amount of generated air ions is likely to be reduced, and the occurrence of corona discharge is likely to occur due to contamination of the discharge needle.
JP-A-62-86699 JP 2005-216539 A

  The present invention has been made in view of such a background, and uses a small and lightweight AC high-voltage power source capable of generating a relatively low-frequency AC high voltage, thereby reducing the size and weight of the entire apparatus. Another object of the present invention is to provide a blower type ion generating device that can generate an air flow for transferring air ions smoothly.

  In order to achieve this object, the blower type ion generator of the present invention has a housing incorporating an AC high-voltage power supply, an air inlet opening on the first wall surface of the outer wall surface of the housing, And an air outlet opened on the wall surface 2 and attached to the casing facing the air inlet so that the air blown from the air outlet is introduced into the casing from the air inlet. A mounted blower, a corona discharge generating electrode member attached to the housing facing the air outlet, and a high voltage cable for connecting the AC high voltage power source to a high voltage application portion of the corona discharge generating electrode member And generating a corona discharge in the corona discharge generating electrode member by applying an AC high voltage from the AC high voltage power source to the high voltage applying portion of the corona discharge generating electrode member. In the blower-type ion generator for transferring the air ions to be blown by the air blown out from the air outlet, the AC high-voltage power source is connected to the high voltage application part of the corona discharge generating electrode member via the high-voltage cable. A winding transformer to which a wire is connected and a pulse generation circuit that alternately and periodically applies a pulse train voltage comprising a positive pulse train and a pulse train voltage comprising a negative pulse train to the primary winding of the winding transformer. And is arranged in the housing at a position that avoids the flow of air from the air inlet to the air outlet (first invention).

  According to the first aspect of the invention, the AC high-voltage power supply is configured by paralleling the winding transformer and a pulse generation circuit.

  Here, in this AC high voltage power supply, positive and negative pulse train voltages (more specifically, for example, a time series of a plurality of rectangular wave pulses) are alternately supplied from the pulse generation circuit to the primary winding of the winding transformer. Since it is periodically applied, an alternating high voltage synchronized with the period in which the pulse train voltages of both polarities are alternately applied is generated in the secondary winding of the winding transformer. That is, a high voltage that increases or decreases in the positive polarity or negative polarity is generated in the secondary winding in response to the application of the positive polarity pulse train voltage to the primary winding, and the negative polarity pulse train voltage is applied to the primary winding. Correspondingly, a high voltage is generated in the secondary winding that increases or decreases with the opposite polarity to that when the positive pulse train voltage is applied. The generation of high voltages having different polarities in this manner is repeated in a cycle in which both polarity pulse train voltages are alternately applied. At this time, the pulse train voltage of each polarity is intermittently applied to the primary winding of each pulse at a higher speed than the cycle in which the pulse train voltages of both polarities are alternately applied. For this reason, the number of turns of the primary winding and the secondary winding of the winding transformer is relatively small, and even if the winding transformer is relatively small, the reciprocal of the period in which the pulse train voltages of both polarities are alternately applied That is, even if the frequency of the AC high voltage generated in the secondary winding is a relatively low frequency (for example, a low frequency of 1 kHz or less), the AC high voltage having a smooth waveform and a desired peak value is secondary. Can be generated in the winding.

  The pulse train generation circuit can be made compact by using, for example, a semiconductor switch element.

  Therefore, the AC high voltage power source according to the first aspect of the invention can make the AC high voltage of a relatively low frequency small and light. Since the AC high-voltage power supply becomes small in this way, even if the volume of the housing is relatively small, the AC high-voltage power supply is connected to the air flow from the air inlet to the air outlet. It can be easily arranged in the housing at a position to avoid. Furthermore, by arranging the AC high-voltage power supply in the casing in this way, air can be smoothly flowed from the air inlet to the air outlet, and the air introduced into the casing from the air inlet can be reduced. The air can be efficiently and uniformly discharged from the air outlet.

  Therefore, according to the blower type ion generator of the first invention, a compact and lightweight AC high voltage power source capable of generating a relatively low frequency AC high voltage is used to reduce the size and weight of the entire device. In addition, the air flow for transferring air ions can be generated smoothly. That is, the air flow blown out from the air blowing port can be made into an air flow with little turbulence, and air ions can be efficiently transferred from the air blowing port to a distant place.

  In the first invention, the AC high-voltage power supply is arranged at the following position, for example.

  That is, a rectifying plate for guiding the air introduced from the air inlet to the air outlet is provided in the casing, and the rectifying plate allows the air in the casing to be introduced from the air inlet. Is defined in a first space that flows toward the air outlet and a second space that is a space other than the first space, and the AC high-voltage power source is disposed in the second space ( Second invention).

  According to the second aspect of the invention, the AC high-voltage power supply is disposed in the second space separated from the first space by the rectifying plate, and is introduced from the air introduction port in the first space. Since air flows toward the air outlet, the air flow is not hindered by the AC high voltage power source. In this case, since the AC high-voltage power supply can be made small, even if the second space is narrow, the AC high-voltage power supply can be arranged in the second space without hindrance.

  Alternatively, when viewed in the normal direction of the first wall surface, the AC high-voltage power supply is opposed to only a portion of the first wall surface other than the portion where the air inlet is opened, It may be arranged at a position close to the wall surface 1 (third invention).

  According to the third aspect of the invention, the air introduced into the housing from the air inlet is prevented from directly hitting the AC high-voltage power supply, and therefore the air can be smoothly blown from the air outlet. In this case, since the AC high-voltage power supply can be made small, even if the area of the first wall surface other than the part where the air inlet is opened is relatively small, it faces the part. AC high voltage power supply can be arranged.

  In the first to third aspects of the invention, the winding transformer may be a single winding transformer, but may be configured as follows. That is, the winding transformer connects the primary windings of the first winding transformer and the second winding transformer in parallel, and each of the first winding transformer and the second winding transformer. A two-stage winding transformer in which secondary windings are connected in series, and the AC high-voltage power supply includes the first winding transformer, the second winding transformer, and the pulse generation circuit arranged in a line. Configured (fourth invention).

  In the fourth aspect of the invention, the same pulse train voltage is applied from the pulse generation circuit to the primary windings of the first winding transformer and the second winding transformer. Then, the sum of AC voltages generated in the secondary windings of the first winding transformer and the second winding transformer is generated as the AC high voltage. At this time, the first winding transformer and the second winding transformer are smaller than when the winding transformer has a single configuration. And, by arranging the first winding transformer, the second winding transformer, and the pulse generating circuit in a line to constitute an AC high voltage power source, the AC high voltage power source can be made more elongated. It becomes easy to arrange the AC high-voltage power supply at a desired location in the housing (a position where air flow from the air inlet to the air outlet is avoided).

  In the first to fourth aspects of the invention, the electrode member for generating corona discharge is configured as follows, for example. That is, the air outlet is a long outlet, and the electrode member for generating corona discharge extends in the longitudinal direction of the air outlet and is disposed within the casing. A long conductor member as a portion, and projecting in a direction perpendicular to the longitudinal direction of the long conductor member from the long conductor member toward the air outlet and electrically connected to the long conductor member A discharge electrode member comprising a plurality of sharp discharge portions arranged in a longitudinal direction of the air outlet, and the long conductor member on both sides of the row of the discharge portions inside the housing, It is comprised from a pair of rod-shaped counter electrode member arrange | positioned extending in parallel and grounded together (5th invention).

  In the fifth aspect of the invention, an AC high voltage is applied to each discharge portion from an AC high voltage power source via a high voltage cable and a long conductor member. At this time, an electric field formed between each discharge part and a pair of grounded rod-shaped counter electrode members is concentrated on the tip part of each discharge part, so that a corona discharge is generated at the tip part of each discharge part. Then, positive and negative air ions are generated. Further, the air ions are transferred by the air flow blown out from the air blowing port. In the fifth aspect of the invention, the long conductor member to which the alternating high voltage is applied and the respective discharge portions are provided in the casing, so that foreign matter is prevented from coming into contact with them.

  Alternatively, the corona discharge generating electrode member may be configured as follows. That is, the air outlet is a long outlet, and a rectifying frame made of an insulating material is provided on the second wall surface so as to surround the air outlet on the outer side of the housing. The corona discharge generating electrode member is provided in a projecting manner and extends in the longitudinal direction of the air outlet and is disposed inside the rectifying frame and is grounded, and the long conductor member A long conductor member projecting from the long conductor member in a direction perpendicular to the longitudinal direction of the long conductor member toward the opposite side of the air outlet and electrically connected to the long conductor member, A discharge electrode member comprising a plurality of sharp discharge portions arranged in a line, and extending in parallel with the long conductor member on both sides of the row of discharge portions inside the rectifying frame. And the outer peripheral surface is covered with an insulator. Composed of a pair of rod-like electrode member as serial high voltage application unit (sixth aspect).

  According to the sixth aspect of the invention, each of the discharge parts is grounded via the long conductor member, and an AC high voltage is applied to the pair of rod-like counter electrode members from the AC high voltage power source via the high voltage cable. . At this time, the electric field formed between each discharge part and the pair of rod-like counter electrode members to which an alternating high voltage is applied is concentrated on the tip part of each discharge part, so that the tip part of each discharge part Corona discharge occurs and positive and negative air ions are generated. Further, the air ions are transferred by the air flow blown out from the air blowing port. In the sixth aspect of the invention, although the corona discharge generating electrode member is disposed outside the casing, each discharge portion is grounded via a long conductor member, and each rod-like counter electrode member is Since the outer peripheral surface is covered with an insulating material, it is possible to prevent a short-circuit current from flowing when a foreign object comes into contact with these discharge portions or rod-shaped counter electrode members. Furthermore, since the rectifying frame body in which the electrode member for generating corona discharge is disposed is an insulator, the rod-shaped counter electrode member to which an alternating high voltage is applied, even if the housing is a metal conductor, An electric field can be prevented from being formed between the casings, and the electric field can be concentrated between the rod-shaped counter electrode member and each discharge portion, and as a result, corona discharge can be generated smoothly.

  In the fifth aspect of the invention, each of the discharge portions may be directly connected to the long conductor member, but may be connected to the long conductor member via a capacitor (first 7 invention). Or each discharge part may be connected to the said elongate conductor member via resistance (8th invention).

  According to the seventh invention or the eighth invention, it is possible to suppress a large short circuit current from flowing even if a foreign object comes into contact with each discharge portion to which an alternating high voltage is applied.

  In the fifth invention or the sixth invention, the discharge electrode member may be configured as follows. That is, the long conductor member is a flat plate member, and the plurality of discharge portions are extended from one side edge extending in the longitudinal direction of the long conductor member among the side edges of the long conductor member. A plurality of serrated plate-like protrusions that are integrally projected with the long conductor member (ninth invention).

  According to the ninth aspect, the discharge electrode member can be easily formed from the original plate by die cutting.

  Supplementally, in the first to ninth inventions described above, the first wall surface and the second wall surface of the housing may be opposite to each other, but the other wall surface stands up with respect to the one wall surface. Two wall surfaces may be used.

  Further, the period of the AC high voltage generated by the AC high voltage power supply is a value in the range of 50 Hz to 1 kHz in terms of frequency, which can reduce the size of the winding transformer of the AC high voltage power supply and stain the discharge part. It is suitable for preventing.

[First Embodiment]
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an external perspective view of the blast type ion generator of this embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is a circuit configuration diagram of an AC high-voltage power supply provided in the blast type ion generator. FIG. 4 is an operation explanatory diagram of the AC high-voltage power supply.

  As shown in FIGS. 1 and 2, the blower ion generator 1 of the present embodiment includes a rectangular parallelepiped casing 2. The housing 2 is a metal conductor, and is grounded to a suitable place outside the housing 2 via a ground wire (not shown). In the housing 2, a corona discharge generating electrode member 3, an AC high voltage power supply 4, and two blowers 5 and 5 are accommodated.

  The front panel 2a and the back panel 2b, which are opposite to each other among the outer wall surfaces of the housing 2, correspond to the second wall surface and the first wall surface in the present invention, respectively. And in the back panel 2b as a 1st wall surface, two square air inlets 6 and 6 are opened along with the longitudinal direction of the housing | casing 2. As shown in FIG. A long rectangular air outlet 7 extending in the longitudinal direction of the housing 2 is provided at the upper portion of the front panel 2a as the second wall surface. The air outlet 7 communicates linearly with each air inlet 6 via the internal space of the housing 2 in the front-rear direction of the housing 2.

  Each of the blowers 5 and 5 introduces air outside the housing 2 from the air inlets 6 and 6 into the housing 2 and blows out the introduced air from the air outlet 7 of the housing 2. is there. As shown in FIG. 2, each blower 5 includes an electric fan 5b built in its outer frame 5a. And each air blower 5 is arrange | positioned inside the housing | casing 2 so that the electric fan 5b may face each air introduction port 6 for every air blower 5, and it is the outer frame 5a. Is attached to the rear panel 2b of the housing 2 via an attachment member (not shown).

  Thereby, each blower 5 sucks the air outside the housing 2 from the air inlet 6 facing the electric fan 5b by the rotating operation of the electric fan 5b, and the sucked air is sucked into the front surface of the housing 2. It sends out toward the panel 2a.

  In this embodiment, two sets of the blower 5 and the air inlet 6 are provided. However, when the length of the air outlet 7 of the front panel 2a of the housing 2 in the longitudinal direction is shorter, One set may be sufficient as the group of the air blower 5 and the air inlet 6. FIG. When the length of the air outlet 7 in the longitudinal direction is longer, three or more sets of the blower 5 and the air inlet 6 may be provided. Furthermore, in this embodiment, although the air blower 5 was arrange | positioned inside the housing | casing 2, you may make it arrange | position on the outer surface side of the back panel 2b outside the housing | casing 2. FIG.

  In the present embodiment, as shown in FIG. 2, air introduced into the housing 2 by the blowers 5 and 5 from the air inlets 6 and 6 is introduced into the housing 2 inside the housing 2. A rectifying plate 8 is provided between the blowers 5 and 5 and the front panel 2a. The rectifying plate 8 includes a flat portion 8a substantially parallel to the bottom plate and the top plate of the housing 2 from the vicinity of the lower end of the air outlet 7 on the inner surface of the front panel 2a toward the rear panel 2b side. An inclined portion 8b that is inclined so as to gradually approach the blowers 5 and 5 from a side edge of the back panel 2b side of the portion 8a to a position near the blowers 5 and 5 of the bottom plate of the housing 2; It extends in the longitudinal direction between both side walls in the longitudinal direction of the housing 2. By the current plate 8, the internal space of the housing 2 is a first space 9 a that is a space above or obliquely above the current plate 8, and a second space 9 b that is a space below or diagonally below the current plate 8. And is defined.

  Here, since the first space 9 a is a space communicating with the air outlet 7 and the air inlets 6, 6, the rotation of the electric fan 5 b of each blower 5 causes each air inlet 6 to enter the housing 2. The air introduced into the air flows toward the air outlet 7 in the first space 9a. At this time, the air introduced into the first space 9 a from the upper part of the air inlets 6, 6 flows almost directly toward the air outlet 7. Air introduced into the first space 9 a from below the air inlets 6 and 6 is guided to the inclined portion 8 b of the rectifying plate 8 and flows toward the air outlet 7. For this reason, almost all of the air introduced from the air introduction ports 6 and 6 smoothly flows to the air blowing port 7 and is blown forward from the air blowing port 7. Further, the air introduced from the air introduction ports 6 and 6 hardly flows into the second space 9b.

  In this embodiment, the corona discharge generating electrode member 3 includes a metal rod-like long conductor member 10 and a plurality of sharp discharges protruding from the long conductor member 10 in a direction perpendicular to the longitudinal direction. Discharge electrode member 12 provided with discharge needle 11 as a part, and a pair of rod-like counter electrode members 13 and 13 are provided.

  The long conductor member 10 is disposed in the first space 9 a inside the housing 2 so as to face the air outlet 7 and extend in the longitudinal direction of the air outlet 7. In this case, a pair of support members 14 and 14 projecting from both sides of the air outlet 7 of the front panel 2a toward the back panel 2b side are provided inside the housing 2 (in FIGS. 1 and 2). Only one support member 14 is shown). These support members 14 and 14 are insulators. The long conductor member 10 is supported by the support members 14 and 14 with both end portions thereof being inserted into the support members 14 and 14.

  In the present embodiment, the long conductor member 10 functions as a high voltage application unit in the present invention. As shown in FIG. 2, the long conductor member 10 is connected to an AC high voltage power source 4, which will be described in detail later, via a high voltage cable 15 wired inside the housing 2.

  The plurality of discharge needles 11 project from the long conductor member 10 toward the air outlet 7 in the same direction (in the front-rear direction of the housing 2), and are equally spaced in the longitudinal direction of the air outlet 7 Are arranged in one column. These discharge needles 11 are metal conductors. In addition, although illustration is abbreviate | omitted, in this embodiment, the base end part by the side of the elongate conductor member 10 of each discharge needle 11 becomes the annular part integrally formed with the discharge needle 11, The annular part is The long conductor member 10 is inserted. The discharge needle 11 is electrically connected to the long conductor member 10 by contact between the annular portion and the long conductor member 10.

  The counter electrode members 13, 13 are both metal conductors, close to the tip of each discharge needle 11 on both sides of the row of discharge needles 11 (upper side and lower side in FIGS. 1 and 2), and It is arranged in the first space 9 a inside the housing 2 so as to extend in the longitudinal direction of the air outlet 7 (parallel to the long conductor member 10). The opposite electrode members 13, 13 are supported by the support members 14, 14 with both ends thereof being inserted into the support members 14, 14. Further, as shown in FIG. 2, the counter electrode members 13 and 13 are grounded to the housing 2 or the like in the housing 2. In addition, since each support member 14 is an insulator, the counter electrode members 13 and 13, the long conductor member 10, and the discharge needle 11 are electrically insulated.

  The AC high-voltage power supply 4 includes a winding transformer 16 and a pulse generation circuit 17 that periodically and periodically applies positive and negative pulse train voltages to the primary winding 16a (see FIG. 3) of the winding transformer 16. Are arranged in a row, and are housed in an elongated casing 4a that is long in the row direction. In this embodiment, the AC high-voltage power supply 4 has an internal space of the housing 2 in a state where the longitudinal direction of the housing 4a is directed to the longitudinal direction of the air outlet 7 as shown in FIGS. The second space 9b is installed near the front panel 2a on the bottom plate of the housing 2. In this case, since the air flowing from the air inlets 6 and 6 to the air outlet 7 does not flow into the second space 9b, the AC high-voltage power supply 4 disposed in the second space 9b is connected to the air inlet 6 , 6 does not hinder the flow of air from the air outlet 7 to the air outlet 7 and is provided at a position to avoid the air flow.

  Here, a more specific circuit configuration example of the AC high-voltage power supply 4 and the operation of the AC high-voltage power supply 4 will be described with reference to FIGS. 3 and 4.

  As shown in FIG. 3, in this embodiment, the pulse generation circuit 17 includes a first series circuit 22 formed by connecting two semiconductor switch elements 18 and 19 in series and two semiconductor switch elements 20 and 21 connected in series. The switch element circuit 24 configured by connecting the second series circuit 23 formed in parallel with each other, and the semiconductor switch elements 18 to 21 of the switch element circuit 24 (hereinafter simply referred to as switch elements 18 to 21). And a switching control circuit 25 for performing on / off control. In the illustrated example, the switch elements 18 to 21 are all MOSFETs, but may be switching transistors.

  In this case, one end of the switch elements 19 and 21 on the side of the switch elements 19 and 21 is grounded, and the other end is a power supply voltage input terminal. A DC power supply voltage Vin is applied to the power supply voltage input terminal from a DC power supply such as a battery (not shown). Further, a switching control circuit 25 is connected to a control signal input section (gate) of each switch element 18 to 21 in order to turn on / off each switch element 18 to 21.

  Further, a portion 17 a between the switch elements 18 and 19 of the first series circuit 22 and a portion 17 b between the switch elements 20 and 21 of the second series circuit 23 form a pair of the pulse generation circuit 17. The primary winding 16a of the winding transformer 16 is connected between the output portions 17a and 17b. Note that one end of the secondary winding 16 b of the winding transformer 16 is grounded, and the other end is connected to the long conductor member 10 of the corona discharge generating electrode member 3 via the high voltage cable 15.

  The switching control circuit 24 is composed of a microcomputer and a control signal generation circuit. The switching control circuit 25 includes a switch element 18 on the non-ground side (power supply voltage input end side) of the first series circuit 22 of the switch element circuit 24, a switch element 19 on the ground side, and a non-ground of the second series circuit 23. Control processing (hereinafter referred to as first on / off control) that intermittently turns on / off the ground side switch element 21 of the second series circuit 23 while controlling the switch element 20 on the side on, off, and off respectively. Processing), the non-ground side switch element 20, the ground side switch element 21 and the non-ground side switch element 18 of the first series circuit 22 are turned on, off, and off, respectively. A control process (hereinafter referred to as a second on / off control process) for intermittently turning on / off the ground side switch element 19 of the first series circuit 22 is periodically and alternately repeated. In the first on / off control process, the switch element 20 is intermittently turned on / off in reverse phase to the switch element 21 (the switch element 20 is controlled to be turned off and on in the on period and the off period of the switch element 21, respectively). You may do it. Similarly, in the second on / off control process, the switch element 18 may be intermittently turned on / off in reverse phase to the switch element 19.

  At this time, in the execution period of the first on / off control process, a positive pulsed input voltage having a waveform similar to the on / off waveform of the switch element 21 is applied to the primary winding 16 a of the winding transformer 16. The More specifically, the input voltage is a positive pulse train voltage (a time series of positive rectangular wave pulse voltages) synchronized with the ON / OFF waveform of the switch element 21. Further, in the execution period of the second on / off control process, a negative pulsed input voltage having a waveform similar to the on / off waveform of the switch element 19 is applied to the primary winding 16 a of the winding transformer 16. . More specifically, the input voltage is a negative pulse train voltage (a time series of negative rectangular wave pulse voltages) synchronized with the ON / OFF waveform of the switch element 19.

  In the description here, regarding the polarity of the input voltage (pulse train voltage), when the output unit 17a has a positive potential with respect to the output unit 17b among the output units 17a and 17b of the switch element circuit 24 for convenience. The input voltage of the primary winding 16a is positive, and the input voltage of the primary winding 16a when the output unit 17a is negative with respect to the output unit 17b is negative. However, the polarity of the input voltage of the primary winding 16a may be defined in reverse to the above.

  As described above, when a positive pulse train voltage is applied to the primary winding 16a of the winding transformer 16 during the execution period of the first on / off control process, the first winding 16b of the winding transformer 16 has a first It is possible to generate a positive (or negative) high voltage having a waveform that increases and decreases smoothly and continuously during the on / off control process. For example, when the switch element 21 is turned on / off as shown in the upper part of FIG. 4 and a pulse train voltage having a waveform similar to the on / off waveform is applied to the primary winding 16a of the winding transformer 16, the secondary winding A high voltage having a waveform as shown in the lower part of FIG. 4 (positive high voltage in the illustrated example) is generated in 16b.

  Similarly, when a negative pulse train voltage is applied to the primary winding 16a of the winding transformer 16 during the execution period of the second on / off control process, the second on / off state is applied to the secondary winding 16b of the winding transformer 16. It is possible to generate a negative voltage (having a reverse polarity to the execution period of the first on / off control process) having a waveform that increases and decreases smoothly continuously in the execution period of the off control process.

  Therefore, in the AC high-voltage power supply 4 of the present embodiment, the switching control circuit 25 alternately and periodically executes the first on / off control process and the second on / off control process, so that the winding transformer 16 An AC high voltage is generated in the secondary winding 16b.

  Supplementally, the waveform or peak value of the high voltage generated in the secondary winding 16b of the winding transformer 16 during the execution period of the first on / off control process is the pattern of the on / off waveform of the switch element 21 (and thus the primary Each pulse width in the pulse train voltage applied to the winding 16a, the interval between pulses, the duty, the number of pulses, etc.). Similarly, the waveform and peak value of the high voltage generated in the secondary winding 16b of the winding transformer 16 in the execution period of the second on / off control process correspond to the on / off waveform pattern of the switch element 19. It will be a thing. The on / off waveform pattern of the switch element 21 in the first on / off control process and the on / off waveform pattern of the switch element 19 in the second on / off control process are the execution periods of the respective control processes. Thus, the waveform and peak value of the high voltage generated in the secondary winding 16b are set in advance so as to become the desired waveform and peak value.

  In the AC high-voltage power supply 4 of the present embodiment configured as described above, the secondary winding is obtained by alternately and periodically applying positive and negative pulse train voltages to the primary winding 16a of the winding transformer 16. Since the positive and negative high voltages are alternately generated on the wire 16b, even if the winding transformer 16 is relatively small (with a relatively small number of windings), the secondary voltage A relatively low frequency AC high voltage of about several tens to several hundreds Hz can be generated in the winding 16b with high efficiency. Further, the pulse generation circuit 17 can be reduced in size by integration into an integrated circuit.

  Therefore, in the present embodiment, the AC high-voltage power supply 4 is configured by arranging small winding transformers 16 and pulse generation circuits 17 in a line, so that the AC high-voltage power supply 4 is small and elongated, and as described above. 2 is accommodated in the second space 9b. In this case, the second space 9b is narrower than the first space 9a for flowing air from the air inlets 6 and 6 to the air outlet 7, but the AC high-voltage power supply 4 is small. Therefore, the AC high-voltage power supply 4 can be accommodated in the second space 9b without hindrance.

  Supplementally, since the electromotive force per winding of the windings 16a and 16b in the winding transformer 16 is proportional to the frequency of the input voltage, in order to reduce the number of turns and reduce the size of the winding transformer 16, A higher frequency of the input voltage of the primary winding 16a is advantageous. The frequency is preferably higher than the commercial frequency of 50 Hz, for example, in order to reduce the size of the winding transformer 16. On the other hand, when the frequency of the AC high voltage output from the secondary winding 16b of the winding transformer 10 becomes a high frequency exceeding 1 kHz, the discharge needle is not allowed to adhere to the discharge needle to which the AC high voltage is applied. It is empirically known that contamination is likely to occur. Therefore, the period of applying positive and negative pulse train voltages to the primary winding 16a (one period of AC high voltage generated in the secondary winding 16b) is a period within a range of 50 Hz to 1 KHz in terms of frequency. Is suitable. In this embodiment, the period is, for example, 5 ms (frequency conversion: 200 Hz).

  The pulse generation circuit 17 has the circuit configuration shown in FIG. 3 in the present embodiment, but is not limited to this. The pulse generation circuit 17 may have another form of circuit configuration as long as it can alternately and periodically output positive and negative pulse train voltages. The pulse generation circuit can be configured by combining a plurality of switch elements and a control circuit for turning them on and off.

  The above is the configuration of the blower ion generator 1 of the present embodiment.

  In this blow type ion generator 1, when the AC high voltage power supply 4 is activated while operating the blowers 5, 5, the AC high voltage power 15 is connected to each discharge needle 11 of the discharge electrode member 12 via the high voltage cable 15 and the long conductor member 10. A voltage is applied. At this time, a corona discharge is generated in the vicinity of the tip of each discharge needle 11 by an electric field formed between the tip of each discharge needle 11 and each counter electrode member 13 grounded. The corona discharge ionizes the air in the vicinity of each discharge needle 11 to alternately generate positive and negative air ions, and the air ions are blown out by the air flow blown out from the air outlet 7. It is transported from the mouth 7 toward the front front thereof. Air ions transferred to the front front of the air outlet 7 are supplied to, for example, a charged object (not shown) disposed in front of the air outlet 7, and the charged object is neutralized.

In this case, the air flowing from the air inlets 6 and 6 to the air outlet 7 inside the housing 2 is not hindered by the AC high-voltage power supply 4, so that the air outlet can be uniformly supplied from various locations of the air outlet 7. An air flow is sent toward the front front of the mouth 7. As a result, the generated air ions can be efficiently and uniformly transferred to the front front of the air outlet 7 and the transfer can be performed far away.
[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is an external perspective view of the blower type ion generator of this embodiment, and FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. In addition, since the ventilation type | formula ion production | generation apparatus of this embodiment differs only in the one part structure from the thing of 1st Embodiment, it demonstrates centering on the difference. The same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed description thereof is omitted.

  As shown in FIGS. 5 and 6, the blower ion generator 31 of the present embodiment has a rectifying frame 32 that surrounds the outer periphery of the air outlet 7 on the outer surface of the front panel 2 a of the rectangular parallelepiped housing 2. Projecting toward the front of the front panel 2a. The rectifying frame 32 is an insulator, and a pair of horizontal plates 32 a and 32 a extending in the longitudinal direction of the air blowing port 7 on the upper side and the lower side of the air blowing port 7, and the longitudinal direction of the air blowing port 7. A pair of vertical plates 32b and 32b provided in a substantially vertical posture with respect to the horizontal plates 32a and 32a at both ends in the direction are integrally coupled. In this case, the length of the horizontal plates 32a, 32a in the front-rear direction of the housing 2 (the amount of protrusion from the front panel 2a) is the length of the vertical plates 32b, 32b in the front-rear direction of the housing 2 (front panel 2a). The amount of protrusion is slightly shorter than The rectifying frame 32 has a function of guiding the air blown from the air blowing port 7 toward the front front of the air blowing port 7.

  Further, as shown in FIG. 6, a rectifying plate 33 having the same function as that of the rectifying plate 8 of the first embodiment is provided between the blowers 5 and 5 and the front panel 2a. ing. In this embodiment, the entire current plate 33 is inclined. More specifically, the rectifying plate 33 gradually moves from the portion near the lower end of the air outlet 7 on the inner surface of the front panel 2a to the blowers 5 and 5 on the bottom plate of the housing 2 near the blowers 5 and 5. It inclines so as to approach, and extends in the longitudinal direction between both side walls in the longitudinal direction of the housing 2. Then, by this rectifying plate 33, the internal space of the housing 2 is a first space 34 a that is a space above or obliquely above the rectifying plate 33 and a second space that is below or obliquely below the rectifying plate 33. The air is defined as a space 34 b, and the air introduced from the air inlet 6 is guided toward the air outlet 7 while being guided by the rectifying plate 33 in the first space 34 a. In the second space 34b, the same AC high-voltage power supply 4 as that of the first embodiment is installed on the bottom plate of the housing 2 at a position near the front panel 2a. In this case, since the AC high-voltage power supply 4 is small, there is no problem even if the second space 34b is relatively narrow, and the AC high-voltage power supply 4 can be installed in the second space 34b.

  In the present embodiment, the corona discharge generating electrode member 35 is disposed so as to face the air outlet 7 inside the rectifying frame 32 (outside the housing 2).

  The corona discharge generating electrode member 35 includes a discharge electrode member 12 having a long conductor member 10 and a plurality of discharge needles 11, and a pair of rod-like counter electrode members 36 and 36. In this case, the structure of the discharge electrode member 12 is the same as that of the first embodiment. However, in the present embodiment, the long conductor member 10 of the discharge electrode member 12 is disposed so as to extend in the longitudinal direction of the air outlet 7 inside the rectifying frame 32. The both ends of the long conductor member 10 are inserted into the vertical plates 32b and 32b of the rectifying frame 32 and supported by the vertical plates 32b and 32b. Each discharge needle 11 protrudes forward from the long conductor member 10 (toward the side opposite to the air outlet 7), and is arranged in a line in the longitudinal direction of the long conductor member 10. Yes. In the present embodiment, the long conductor member 10 is grounded to the housing 2 or the like.

  On the other hand, each counter electrode member 36 in the present embodiment is slightly different from that in the first embodiment. More specifically, each counter electrode member 36 is configured by covering the outer periphery of a metal linear or rod-like elongated conductor 36a with a tubular insulator 36b over substantially the entire length of the elongated conductor 36a. These counter electrode members 36, 36 are adjacent to the tip of each discharge needle 11 on both sides of the row of discharge needles 11 (upper side and lower side in FIGS. 5 and 6) as shown in FIG. It is arranged inside the rectifying frame 32 so as to extend in the longitudinal direction of the outlet 7. In this case, of the counter electrode members 36, 36, the upper counter electrode member 36 is disposed so as to face the tip of the upper horizontal plate 32a of the rectifying frame 32, and the lower counter electrode member 36 is It arrange | positions so that the front-end | tip of the horizontal plate 32a of the lower side of the rectification | straightening frame 32 may be opposed. The opposite electrode members 36 and 36 are supported by the vertical plates 32b and 32b, with both ends thereof being inserted into the vertical plates 32b and 32b of the rectifying frame 32. Further, in the present embodiment, the counter electrode members 36 and 36 are high voltage application portions of the corona discharge generating electrode member 35, and the AC high voltage power supply 4 is wound via the high voltage cable 15 wired in the housing 2. It is connected to the secondary winding 16b (not shown in FIGS. 5 and 6) of the line transformer 16.

  The configuration other than that described above is the same as that of the first embodiment.

  Here, it supplements regarding the structure of the electrode member 35 for corona discharge generation in this embodiment. In the present embodiment, the discharge electrode member 12 is grounded, and an AC high voltage is applied to the counter electrode members 36 and 36 from the AC high voltage power source 4. For this reason, if the corona discharge generating electrode member 35 is accommodated in the housing 2 in the same manner as in the first embodiment, each of the counter electrode members is applied when an AC high voltage is applied to the counter electrode members 36 and 36. An electric field is formed not only between the electrodes 36 and 36 and the discharge needles 11 but also between the counter electrode members 36 and 36 and portions of the housing 2 that are conductors close to the counter electrode members 36 and 36. Thus, the concentration of the electric field on each discharge needle 11 is weakened. As a result, corona discharge may not occur smoothly.

  Therefore, in this embodiment, the rectifying frame 32 made of an insulating material is provided outside the housing 2, and the corona discharge generating electrode member 35 is disposed inside the rectifying frame 32. In this case, since the counter electrode members 36 and 36 as the high voltage application unit are disposed outside the housing 2, a short-circuit current flows when a foreign object contacts the counter electrode members 36 and 36. In order to prevent this, the outer peripheral surface of each counter electrode member 36 is formed of an insulator 36b.

  In the blow type ion generator 31 of this embodiment, an AC high voltage is applied from the AC high voltage power source 4 to the counter electrode members 36 and 36 via the high voltage cable 15. At this time, as in the first embodiment, the generation of corona discharge and the generation of air ions are performed, and the generated air ions are generated by the air flow blown from the air outlet 7 by the operation of the blowers 5 and 5. It is transferred from the air outlet 7 toward the front of the front.

  In this case, as in the first embodiment, the air flowing from the air inlets 6 and 6 to the air outlet 7 inside the housing 2 is not hindered by the AC high-voltage power supply 4. An air flow is sent out uniformly from each place toward the front in front of the air outlet 7.

  In addition, when the outer peripheral surface of the counter electrode member is formed of an insulator as in this embodiment, the ion balance (the amount of positive and negative air-in generated by corona discharge is adjusted by adjusting the thickness of the insulator, etc. Ratio) can also be adjusted. This is the same even if the outer periphery of each counter electrode member 13 in the blow type ion generator 1 of the first embodiment is covered with an insulator as in this embodiment.

Further, in the blow type ion generating device 31 having the structure of the present embodiment, as in the first embodiment, each counter electrode member 36 is grounded and an AC high voltage is applied to the discharge electrode portion 12. There is no problem in appropriately generating corona discharge and generating air ions. However, when the corona discharge generating electrode member 35 is disposed outside the housing 2 as in the present embodiment, the contact of foreign matter with the high voltage application portion of the corona discharge generating electrode member 35 is considered in the present embodiment. As described above, it is desirable to ground the discharge electrode portion 12 and apply an alternating high voltage to the counter electrode members 36 and 36 whose outer peripheral surface is formed of an insulator 36b.
[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is a diagram schematically showing the structure of the AC high-voltage power supply in the present embodiment. In addition, about the component same as the said 1st Embodiment or 2nd Embodiment, the same referential mark as 1st Embodiment or 2nd Embodiment is attached | subjected, and description is abbreviate | omitted.

  This embodiment is different from the first embodiment or the second embodiment only in the structure of the AC high-voltage power supply. As shown in FIG. 7, the AC high-voltage power supply 40 in this embodiment includes a winding transformer 43 including a low-voltage stage winding transformer 41 and a high-voltage stage winding transformer 42, the pulse generation circuit 17 described above, and an ion balance. And a low voltage stage winding transformer 41, a high voltage stage winding transformer 42, a pulse generation circuit 17, and an ion balance control circuit 44 are arranged in a line.

  In this case, the low-voltage stage winding transformer 41 and the high-voltage stage winding transformer 42 correspond to the first winding transformer and the second winding transformer in the present invention, respectively. The primary windings 41 a and 42 a of the low-voltage stage winding transformer 41 and the high-voltage stage winding transformer 42 are connected in parallel between the output units 17 a and 17 b of the pulse generation circuit 17. Further, the secondary windings 41b and 42b of the low-voltage stage winding transformer 41 and the high-voltage stage winding transformer 42 are connected in series, and one end of the low-voltage stage winding transformer 41 on the secondary winding 41b side in the series circuit. Is connected to the other end of the high-voltage stage winding transformer 42 on the secondary winding 41b side. The ion balance control circuit 44 is constituted by a microcomputer or the like, and is connected to the switching control circuit 25 of the pulse generation circuit 17. The ion balance control circuit 44 can appropriately adjust the on / off waveform patterns of the switch elements 19 and 21 of the switch element circuit 24 via the switching control circuit 25.

  The configuration other than the AC high-voltage power supply 40 described above is the same as that of the blower-type ion generator 1 or 31 of the first embodiment or the second embodiment.

  In the AC high-voltage power supply 40 configured as described above, the winding transformer 43 is constituted by the low-voltage stage winding transformer 41 and the high-voltage stage winding transformer 42, so that an AC high voltage having the same magnitude as that of the AC high-voltage power supply 4 is generated. In the generation, the number of turns of the low-voltage stage winding transformer 41 and the high-voltage stage winding transformer 42 and the size of each can be made smaller than that of the winding transformer 16 of the AC high-voltage power supply 4. Therefore, the size of the AC high-voltage power supply 40 can be made more slender, and the accommodation in the second space 9b or 34b is facilitated.

  Also, a high voltage generated on the secondary side of the winding transformer 43 (the sum of the output voltage on the secondary side of the low-voltage stage winding transformer 41 and the output voltage on the secondary side of the high-voltage stage transformer 42). Since the waveform and peak value of this are in accordance with the on / off waveform pattern of the switch elements 19 and 21 as in the case of the winding transformer 16, the on / off waveform pattern is changed to the ion balance control circuit 44. By adjusting according to the above, the ion balance of the blower-type ion generator can be adjusted as appropriate.

In addition, although the AC high voltage power supply 40 of the present embodiment includes the ion balance control circuit 44, this may be omitted. Moreover, you may make it add the ion balance control circuit 44 to the alternating current high voltage power supply 4 in the said 1st Embodiment or 2nd Embodiment.
[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view showing the structure of the discharge electrode member in the present embodiment. The same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.

  This embodiment is different from the first embodiment only in the partial structure of the discharge electrode member. As shown in FIG. 8, in the discharge electrode member 50 according to the present embodiment, the outer peripheral surface of the long conductor member 10 is covered with an insulator 51, and a metal short current collecting ring is formed on the outer periphery of the insulator 51. 52 is inserted. The discharge needle 11 conducted to the current collection ring 52 is projected from the outer peripheral surface of the current collection ring 52 in the radial direction of the current collection ring 52. Furthermore, the outer periphery of the current collecting ring 52 is covered with an insulator 53 with the discharge needle 11 protruding. A plurality of sets of the discharge needle 11 and the current collecting ring 52 are provided, and are arranged in a line along the long conductor member 10.

  The configuration other than the discharge electrode member 50 described above is the same as that of the first embodiment.

  In the discharge electrode member 50 configured as described above, the insulator 51 between the current collecting ring 52 and the long conductor member 10 functions as a capacitive member. Accordingly, each discharge needle 11 is connected (capacitively coupled) to the long conductor member 10 via a capacitor. For this reason, even if a foreign object contacts each discharge needle 11 to which an alternating high voltage is applied, it is possible to suppress a short-circuit current from flowing.

In addition, you may connect the elongate conductor member 10 which comprises the discharge electrode member 50, and each discharge needle 11 via a capacitor | condenser element. Further, in order to suppress a short-circuit current from flowing when a foreign object comes into contact with each discharge needle 11, the long conductor member 10 constituting the discharge electrode member 50 and each discharge needle 11 are connected via a resistor. It may be. In this case, a resistance element may be used, but when the discharge electrode member 50 has a structure as shown in FIG. 8, instead of the insulator 51, for example, an electrostatic diffusive material having an electric resistance of about 1 MΩ is used. What is necessary is just to use the member which becomes.
[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a plan view of the discharge electrode member in the present embodiment.

  This embodiment is different from the first embodiment or the second embodiment only in the structure of the discharge electrode member. As shown in FIG. 9, the discharge electrode member 60 according to the present embodiment includes a metal elongated plate-like long conductor member 61 and a plurality of sharp edges from one side edge (long side) of the long conductor member 61. A serrated projection 62 as a simple discharge portion is formed integrally with the long conductor member 61. These protrusions 62 are arranged in a line at equal intervals in the longitudinal direction of the long conductor member 61. The discharge electrode member 60 having such a structure can be easily formed by die-cutting a metal original plate.

  The configuration other than the discharge electrode member 60 described above is the same as that of the first embodiment or the second embodiment.

As the AC high voltage power supply in the fourth embodiment and the fifth embodiment, the AC high voltage power supply 40 in the third embodiment is used instead of the AC high voltage power supply 4 in the first embodiment or the second embodiment. May be.
[Sixth Embodiment]
Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 10 is an external perspective view of a main part of the blower type ion generator in the present embodiment. In addition, about the component same as either of the said 1st-5th embodiment, the same referential mark as the 1st-5th embodiment is attached | subjected and description is abbreviate | omitted.

  In the first to fifth embodiments, the air inlets 6 and 6 are opened in the rear panel 2b of the housing 2, but the air inlet may be opened in the other wall surface of the housing. . This embodiment shows an example.

  As shown in FIG. 10, the blower ion generator 71 of this embodiment includes a rectangular parallelepiped casing 72, and two rectangular air inlets on a bottom plate 72 c as a first wall surface of the casing 72. 73 and 73 are opened side by side in the longitudinal direction of the casing 72. And the air blowers 5 and 5 of the same structure as 1st Embodiment or 2nd Embodiment are attached to the baseplate 72c, respectively facing each air inlet 73,73. In the illustrated example, the blowers 5 and 5 are accommodated in the housing 72. In addition, a long rectangular air outlet 74 is formed on the upper portion of the front panel 72a as the second wall surface that stands up with respect to the bottom plate 72c of the casing 72, as in the first embodiment or the second embodiment. It has been established.

  On the bottom plate 72 c, the AC high-voltage power supply 4 is installed between the blowers 5, 5 and the front panel 72 a so that the longitudinal direction thereof is in the longitudinal direction of the casing 72. In this case, the AC high-voltage power supply 4 is opposed only to a portion of the bottom plate 72c other than the location where the air inlets 73 and 73 are opened when viewed in the normal direction of the bottom plate 72c (vertical direction in FIG. 10). is doing.

  Although not shown, the corona discharge generating electrode member 3 is provided in the housing 72 so as to face the air outlet 74, for example, as in the first embodiment. However, as in the second embodiment, the rectifying frame 32 may be provided outside the front panel 72 a and the corona discharge generating electrode member 35 may be arranged inside the rectifying frame 32. Further, the discharge electrode member may have the structure of the fourth embodiment or the fifth embodiment.

  In the present embodiment, the casing 72 is not provided with the rectifying plates 8 and 33 as in the first embodiment or the second embodiment.

  The configuration other than that described above is the same as that of any of the first to fifth embodiments.

  In this embodiment, the air introduced into the housing 72 from the air inlets 73 and 73 by the operation of the blowers 5 and 5 hits the top plate 72d of the housing 72 and then moves along the top plate 72d. The air flows toward the air outlet 74 and is blown out from the air outlet 74. At this time, since the AC high-voltage power supply 4 is installed on the bottom plate 72 so as to face only a portion of the bottom plate 72 other than the location where the air introduction ports 73 and 73 are opened, The air flowing from 73 to the air outlet 74 is prevented from hitting the AC high-voltage power supply 4. Therefore, the air introduced into the housing 72 can be uniformly blown out from the air blowing port 74 as in the first embodiment or the second embodiment.

  In the present embodiment, the AC high-voltage power supply 4 in the first embodiment or the second embodiment is used as the AC high-voltage power supply, but the AC high-voltage power supply 40 in the third embodiment may be used.

  Further, in the present embodiment, a current plate is provided inside the casing 72, and the internal space of the casing 72 is defined as a space through which air flows and a space other than that, so that no air flows. You may make it install alternating current high voltage power supply 4 or 40. FIG.

  In the first to fifth embodiments, when viewed in the normal direction of the back panel 2b (the front-rear direction of the housing 2), which is the wall surface where the air inlets 6 and 6 are opened, The AC high-voltage power supply 4 or 40 may be disposed at a location near the back panel 2b so that 40 faces only a location other than the location where the air introduction ports 6 and 6 are opened. For example, a gap may be provided between the blowers 5 and 5 and the bottom plate, and the AC high voltage power supply 4 or 40 may be disposed in the gap. In this case, as in the sixth embodiment, the air introduced into the housing 2 from the air inlets 6 and 6 is prevented from directly hitting the AC high-voltage power supply 4 or 40. The Therefore, in this case, the rectifying plates 8 and 33 inside the housing 2 may be omitted.

Moreover, in the said 1st-6th embodiment, although the housing | casing 2 or 72 was made into the rectangular parallelepiped shape, other shapes, such as a rectangular parallelepiped shape, may be sufficient.
[Static elimination performance test]
Next, a performance test in the case of performing charge neutralization of a charged object using the blow type ion generator of the embodiment of the present invention will be described with reference to FIG. FIG. 11 is a diagram showing a system configuration in the performance test.

  The inventor of the present application, for example, in place of the discharge electrode member 12 in the first embodiment, the discharge electrode member 50 in FIG. A blower ion generator 81 using a discharge electrode member 50) having a capacitively coupled structure was created as a blower ion generator of the example. And the static elimination performance of this ventilation type | mold ion generator 81 was measured using the charging plate monitor apparatus 90 shown in FIG.

  Here, the charging plate monitoring device 90 includes a 150 mm square metal plate 93 supported by a main body 91 via a plurality of insulators 92. The metal plate 93 simulates a charged object to be neutralized. In this case, the main body 91 includes a DC high-voltage power supply 94, a surface potential measuring device 95, and a timer 96. Then, by applying a predetermined DC voltage (+1000 V or −1000 V) to the metal plate 93 from the DC high-voltage power supply 94, the metal plate 93 can be charged with positive or negative charge. It has become. Further, the potential of the metal plate 93 can be measured by a surface potential measuring device 95. Further, the timer 96 can measure the decay time when the potential of the metal plate 93 decays from +1000 V to +100 V and the decay time when the potential of the metal plate 93 decays from −1000 V to −100 V, respectively.

  As shown in FIG. 11, the metal plate 93 of the charging plate monitoring device 90 is separated from the front panel 2a by a predetermined distance L (for example, 300 mm) in front of the front panel 2a of the blower ion generator 81. Arranged.

  Then, after the metal plate 93 is charged to +1000 V, the blower ion generator 81 is operated (air containing positive and negative air ions is blown from the blower ion generator 81 to the metal plate 93). The decay time at which the potential of the metal plate 93 decays to + 100V was measured. Similarly, after the metal plate 93 was charged to −1000 V, the blower ion generator 81 was operated, and the decay time during which the potential of the metal plate 93 was attenuated to −100 V was measured. Further, an offset voltage as a potential of the metal plate 93 in a steady state after the metal plate 93 was attenuated (a state in which the operation of the blower ion generator 81 was performed for a sufficiently long time) was measured. The offset voltage is an index of ion balance of the blower ion generator 81.

  In addition, the peak value of the alternating current high voltage which the alternating current high voltage power supply 4 of the ventilation type ion generator 81 of an Example outputs is 9 kV, and a frequency is 200 Hz. Moreover, the speed of the air flow at the position of the metal plate 93 is about 1.5 m / sec.

  In addition, in order to compare with the blow type ion generator 81 of the embodiment, a conventional structure in which an AC high-voltage power source configured by a winding transformer that inputs an AC voltage of commercial frequency (50 Hz) to the primary winding is built in the casing The blast type ion generating device was prepared as a blast type ion generating device of a comparative example, and the same test as the blast type ion generating device 81 of the example was performed on the blast type ion generating device of this comparative example. In addition, the blowing type ion generator of this comparative example is different from the blowing type ion generator 81 of an Example only in the structure of the AC high voltage power supply and its arrangement configuration. In this case, in the blow type ion generator of the comparative example, although the AC high voltage power source is disposed near one side of the housing, it is relatively large, and therefore a part thereof is an air inlet and an air outlet. Projects between the mouth. In addition, the effective value of the alternating current high voltage which the alternating current high voltage power supply of the ventilation type ion generator of a comparative example outputs is 7 kV (peak value is 9.8 kV), and the frequency is 50 Hz.

  The test results are shown in Table 1.

  As can be seen from Table 1, the offset voltage is almost the same in the example and the comparative example, but the decay time is shorter in the example than in the comparative example. From this, it can be seen that in the blower ion generator 81 of the example, air ions are efficiently supplied to the metal plate 93 as compared to the blower ion generator of the comparative example.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a blower type ion generator of a first embodiment of the present invention. II-II sectional view taken on the line of FIG. The circuit block diagram of the alternating current high voltage power supply with which the ventilation type ion generator of 1st Embodiment was equipped. Operation | movement explanatory drawing of the alternating current high voltage power supply of FIG. The external appearance perspective view of the ventilation type | formula ion generator of 2nd Embodiment of this invention. VI-VI sectional view taken on the line of FIG. The figure which shows typically the structure of the alternating current high voltage power supply with which the ventilation type ion generator of 3rd Embodiment of this invention was equipped. Sectional drawing of the discharge electrode member with which the ventilation type ion generator of 4th Embodiment of this invention was equipped. The top view of the discharge electrode member with which the ventilation type ion generator of 5th Embodiment of this invention was equipped. The external appearance perspective view of the principal part of the ventilation type | formula ion generator of 6th Embodiment of this invention. The figure which shows the system configuration | structure in the test of static elimination performance.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,31,71,81 ... Air blow type | formula ion generator, 2,72 ... Housing | casing, 2a, 72a ... Front panel (2nd wall surface), 2b ... Back panel (1st wall surface), 72c ... Bottom plate (1st) 1), 3, 35 ... electrode members for generating corona discharge, 4, 40 ... AC high voltage power supply, 5 ... blower, 6, 73 ... air inlet, 7, 74 ... air outlet, 8, 33 ... current plate , 9a, 34a ... first space, 9b, 34b ... second space, 10, 61 ... long conductor member, 11, 62 ... discharge part, 12, 50, 60 ... discharge electrode member, 13, 36 ... opposite Electrode member, 15 ... high voltage cable, 16, 43 ... winding transformer, 17 ... pulse generating circuit, 41 ... low voltage stage winding transformer (first winding transformer), 42 ... high voltage stage winding transformer (second winding) Wire transformer).

Claims (9)

A housing incorporating an AC high-voltage power supply, an air introduction port established on the first wall surface of the outer wall surface of the housing and an air outlet port established on the second wall surface; A blower attached to the housing facing the air inlet so as to introduce air to be introduced into the housing from the air inlet, and attached to the housing facing the air outlet A corona discharge generating electrode member and a high voltage cable connecting the AC high-voltage power supply to the high voltage application portion of the corona discharge generation electrode member, the high voltage application portion of the corona discharge generation electrode member, By applying an AC high voltage from the AC high voltage power source, a corona discharge is generated by the corona discharge generating electrode member, and air ions generated by the corona discharge are transferred by the air blown out from the air outlet. In blowing type ion generator,
The AC high-voltage power supply includes a winding transformer in which a secondary winding is connected to the high voltage application portion of the electrode member for generating corona discharge via the high-voltage cable, and a positive polarity in the primary winding of the winding transformer. A position in which a pulse train voltage composed of a pulse train and a pulse train voltage composed of a negative pulse train are alternately and periodically applied is arranged in parallel to avoid the flow of air from the air inlet to the air outlet. A blower-type ion generator arranged in the housing.   The blast ion generator according to claim 1, wherein a rectifying plate that guides air introduced from the air inlet to the air outlet is provided in the casing, and the rectifying plate creates a space in the casing. The AC high-voltage power supply is defined by a first space for flowing air introduced from the air inlet toward the air outlet and a second space that is a space other than the first space. A blower type ion generator arranged in the second space.   2. The blower ion generator according to claim 1, wherein the AC high-voltage power supply is located in a direction normal to the first wall surface, except for a portion of the first wall surface where the air inlet is opened. The blower type ion generator is arranged so as to face only the portion and to be located near the first wall surface.   The blower ion generator according to any one of claims 1 to 3, wherein the winding transformer connects the primary windings of the first winding transformer and the second winding transformer in parallel. , A two-stage winding transformer in which the secondary windings of the first winding transformer and the second winding transformer are connected in series, and the AC high-voltage power supply includes the first winding transformer. And a second winding transformer and the pulse generation circuit arranged in a line. In the ventilation type ion generator of any one of Claims 1-4,
The air outlet is a long outlet, and the corona discharge generating electrode member extends in the longitudinal direction of the air outlet and is arranged as the high voltage application unit disposed inside the casing. A long conductor member, and protruding from the long conductor member toward the air blowing port in a direction perpendicular to the longitudinal direction of the long conductor member and electrically connected to the long conductor member, A discharge electrode member comprising a plurality of sharp discharge portions arranged so as to be aligned in the longitudinal direction of the air outlet, and parallel to the long conductor member on both sides of the row of discharge portions inside the housing A blower type ion generator comprising a pair of rod-like counter electrode members that are extended and arranged and grounded together. In the ventilation type ion generator of any one of Claims 1-4,
The air outlet is a long outlet, and a rectifying frame made of an insulating material is provided on the second wall surface so as to surround the air outlet on the outside of the housing. Has been
The electrode member for generating corona discharge extends in the longitudinal direction of the air outlet and is disposed inside the rectifying frame and is grounded, and the air is drawn from the long conductor member to the air. Projecting in a direction perpendicular to the longitudinal direction of the long conductor member toward the side opposite to the blowout port, and electrically connected to the long conductor member, arranged so as to be aligned in the longitudinal direction of the air blowout port A discharge electrode member having a plurality of sharp discharge portions, and an outer periphery that extends in parallel with the long conductor member on both sides of the row of the discharge portions inside the rectifying frame A blower type ion generator comprising a pair of rod-like counter electrode members as the high voltage application section whose surface is covered with an insulator.   6. The blower type ion generator according to claim 5, wherein each of the discharge parts is connected to the long conductor member via a capacitor.   The blast type ion generator according to claim 5, wherein each discharge part is connected to the long conductor member via a resistor.   7. The blower type ion generator according to claim 5, wherein the long conductor member is a flat plate member, and the plurality of discharge portions are the long conductor members of the side edges of the long conductor member. A blower-type ion generating apparatus, comprising: a plurality of sawtooth plate-like protrusions integrally protruding from the one side edge extending in the longitudinal direction of the long conductor member.

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