JP2009224280A - Ventilation type ion generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation type ion generator for downsizing the whole generator and smoothly generating an air flow for transferring an air ion. <P>SOLUTION: An ion generation means 1 for generating air ions is arranged at an air feeding side of a blower 2 with a propeller fan 7. An air blowing port 3 for blowing air from the blower 2 is arranged on the ion generation means 1. The air blowing port 3 is formed in a ring-shape on the basis of a gap between an external cylinder section 8 and an internal cylinder section 9. A discharge electrode 14 applying high voltage is arranged at an outer side of the internal cylinder section 9, and an opposite electrode grounded with the external cylinder section 8 is arranged. An AC high-voltage power source 13 for supplying high-voltage to the discharge electrode 14 is housed on a power source chamber 12 formed on the blocked inside of the internal cylinder section 9. Air ions are generated by generating corona discharge by applying high voltage to the discharge electrode 14, and the air ions are transferred with the air flow blowing from the air blowing port 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a blower-type ion generator that generates corona discharge in air to generate positive and negative air ions, and transfers the air ions by an air flow to neutralize charged objects.

  A corona discharge (airborne corona discharge) is generated by a corona discharge generating electrode having a discharge needle or the like, and air ions generated at this time are discharged on an air flow sent out by a fan or other blower, thereby generating an air flow. 2. Description of the Related Art Conventionally, there is known a blow type ion generating apparatus in which air ions transported to a charged object are sprayed on a charged object to neutralize 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 alternating high voltage from an alternating high voltage power source to the voltage applying portion of the corona discharge generating electrode, thereby generating positive and negative air ions. Is generated. The positive and negative air ions generated in this way are transferred by the air flow of the blower, so that even a charged object located at a relatively distant position can be well discharged.

  By the way, in the conventional ventilation type | formula ion generator, the winding transformer which has the primary winding in which the alternating voltage of a commercial frequency (50 Hz or 60 Hz) is input from the commercial power supply was generally used as an alternating current high voltage power supply. However, the AC high-voltage power source composed of such a commercial-frequency winding transformer is relatively large and heavy, and when it is housed in a single casing together with a blower and a corona discharge generating electrode, a blow type ion generator is configured. Therefore, it is difficult to reduce the size and weight of the blower ion generator.

  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 Document 1). As another high-voltage power source, there is a type using a small and lightweight DC high-voltage power source using a plus high voltage generating circuit and a minus high voltage generating circuit (see, for example, Patent Document 2).

However, these high-voltage power supplies need to be arranged at positions that do not obstruct the air flow formed by the blower, so they are arranged on the side of the blower or outside the corona discharge generating electrode, and the entire device is small. It was difficult to make it.
JP 2005-216539 A JP 2007-305366 A

  The present invention has been made in view of such a background, and provides a blower-type ion generator that can reduce the size of the entire apparatus and can smoothly generate an air flow for transferring air ions. Is an issue.

  In order to solve such a problem, the present invention includes a blower that sends out air by rotation of a propeller fan, and an ion generation unit that is located on the air sending side of the blower and generates air ions. In the blower-type ion generator that transfers the air ions generated by the airflow from the blower, the ion generator includes an air outlet that guides the air sent from the blower in the blowing direction, and an AC high voltage An AC high-voltage power supply that outputs a corona discharge when a high voltage is applied from the AC high-voltage power supply and generates air ions from the corona discharge. Is a cylindrical outer cylinder part having a peripheral wall corresponding to the outer diameter of the rotation circumference of the propeller fan, and a peripheral wall of the outer cylinder part located inside the outer cylinder part The AC high voltage power supply is formed by closing both ends in the axial direction of the inner cylinder portion, with a gap between it and a cylindrical inner cylinder portion having a peripheral wall facing each other with a predetermined gap in the circumference. The discharge electrode housed in the power supply chamber, the corona discharge generation electrode is disposed facing the air outlet, the discharge electrode is provided in the inner cylinder portion and applied with a high voltage from the AC high-voltage power source, It is comprised by the grounded counter electrode which is provided in the said outer cylinder part and opposes this discharge electrode, It is characterized by the above-mentioned.

  According to the present invention, with the above configuration, the air outlet is formed by the gap between the outer cylinder part and the inner cylinder part, so the flow area of the air flow sent from the blower is narrowed to increase the flow velocity. Can do. As a result, more air ions generated by the corona discharge generating electrode facing the air outlet can be sent out on the air flow, so that the amount of released air ions can be increased.

  Moreover, the air outlet is not only formed in an annular shape by the outer cylinder part and the inner cylinder part, but the outer cylinder part has a peripheral wall corresponding to the outer diameter of the rotation circumference of the propeller fan, so that the propeller fan Thus, most of the air flow to which centrifugal force is applied can be passed.

  On the other hand, the air flow formed by the propeller fan is small in the center. Therefore, in the present invention, both ends in the axial direction of the inner cylinder portion located in the central portion where the air flow is small are closed to form a power supply chamber, and the AC high-voltage power supply is accommodated in the power supply chamber. By doing so, the AC high-voltage power supply can be arranged by effectively using a space that does not hinder the sending of air by the blower, and the entire apparatus can be compactly formed. Further, supplementally, the AC high-voltage power supply is not constituted by a commercial-frequency winding transformer, but a small and light-weight high-frequency power supply using a known high-frequency transformer or piezoelectric transformer is used. Thereby, it is not necessary to enlarge a power supply chamber, and it can be easily accommodated inside the inner cylinder portion.

  In the present invention, the counter electrode can be formed by the grounded metal outer tube portion. The number of parts can be reduced by forming the outer cylinder portion from a metal and grounding the outer cylinder portion as a counter electrode.

  In the present invention, the counter electrode may be formed of a metal cylindrical member that is attached to the outer periphery of the outer cylinder portion made of an insulating material and is grounded. When a high voltage is applied to the discharge electrode, corona discharge occurs at the discharge electrode. However, if there are many air ions between the two electrodes, the air has conductivity. At this time, if the distance between the two electrodes is small, the corona discharge may shift to a spark discharge, but the transition from corona discharge to spark discharge is caused by an outer cylinder made of an insulating material between the electrodes. It is possible to prevent a decrease in the amount of air ions accompanying the spark discharge, damage to both electrodes, generation of noise, and the like.

  Further, in the present invention, the discharge electrode is provided on the inner surface side of the inner wall of the inner cylinder portion and connected to the AC high-voltage power source via a high-voltage cable, and a predetermined circumferential direction of the annular base portion. A plurality of sharp discharge needles are formed integrally with the annular base portion with a space therebetween and project through the peripheral wall of the inner cylinder portion and project to the air outlet. According to this, a corona discharge can be reliably obtained by concentrating a high electric field on the sharp tip of the discharge needle. Since the plurality of discharge needles protrude at a predetermined interval in the circumferential direction of the inner cylinder portion, corona discharge can be generated substantially uniformly over the entire circumference, so that air ions can be generated efficiently.

  Further, the discharge electrode is provided on the inner surface of the inner wall of the inner wall and connected to the AC high-voltage power source via a high-voltage cable, and a circumferential direction on the outer peripheral edge of the flat plate base. May be formed integrally with the flat plate annular base portion at a predetermined interval, and may be formed by a plurality of serrated protrusions having sharp tips penetrating the peripheral wall of the inner cylinder portion and projecting to the air outlet. According to this, a discharge electrode can be easily created by punching from a metal raw material.

  At this time, the flat plate annular base is superposed on the same metal flat plate annular member facing the flat plate annular base via an insulating flat plate member, and the high voltage cable is connected to the AC high voltage power source. By connecting via the capacitor, an AC high voltage may be applied to the flat plate base via a capacitor. Since the discharge electrode is formed in a flat plate shape with a metal flat plate base and a sawtooth projection, a capacitor can be easily formed by superposing the flat plate member of the insulator and the flat plate member made of metal. it can. And even if a foreign material contacts each sawtooth projection by applying an alternating current high voltage via a capacity | capacitance, it can suppress that a big short circuit current flows.

  Further, the flat plate base is formed by arranging a plurality of arc bases formed in an arc shape in an annular shape at a predetermined interval, and each arc base portion is provided with one or more sawtooth projections. The connection capacity at each arc base is reduced, and the short-circuit current can be more reliably suppressed.

  The above is a configuration in which an AC high voltage power supply is provided and an AC term voltage is applied to the corona discharge generating electrode, but the same effect can be obtained even if a small and light DC high voltage power supply is used instead of the AC high voltage power supply. Can do. That is, as another aspect of the present invention, the ion generating means includes an air outlet that guides the air sent from the blower in the blowing direction, a DC high-voltage power source that outputs positive and negative DC high voltages, and A corona discharge is generated by applying a high voltage from a DC high-voltage power source, and air ions are generated from the corona discharge, and the air outlet has a rotating circumference of the propeller fan. A cylindrical outer cylinder portion having a peripheral wall corresponding to the outer diameter of the outer cylindrical portion, and a cylindrical outer wall portion which is located inside the outer cylinder portion and faces the entire circumference of the outer cylinder portion with a predetermined gap. An annular space is formed between the inner cylinder part and the DC high-voltage power source is housed in a power supply chamber formed by closing both axial ends of the inner cylinder part, and the corona discharge generating electrode is It is arranged facing the air outlet, A positive discharge electrode provided in the inner cylinder portion to which a positive high voltage is applied by the DC high-voltage power source, and provided in the inner cylinder portion adjacent to the positive discharge electrode, and negative by the DC high-voltage power source. And a negative discharge electrode to which a high voltage is applied.

  According to the present invention, it is possible to increase the amount of air ions emitted by forming an air flow having a high flow velocity by the annular air outlet formed by the outer cylinder portion and the inner cylinder portion. As described above, a power supply chamber is formed inside the inner cylinder portion located in the central portion where the air flow by the propeller fan is relatively small, and the DC high-voltage power supply is accommodated in the power supply chamber, thereby The DC high-voltage power supply can be arranged by effectively using a space that does not hinder the delivery, and the entire apparatus can be made compact.

  In the present invention, it is preferable that the discharge electrode is supported by a support member that is detachably attached to the inner cylinder part, and is removable from the inner cylinder part integrally with the support member. According to this, a discharge electrode is removed from an inner cylinder part with a support member, and cleaning and a maintenance can be performed easily.

  Moreover, in this invention, the said ion production | generation means may be connected with the flame | frame which accommodates the propeller fan of the said air blower so that attachment or detachment is possible. In this way, the ion generating means is separated from the blower and not only maintenance work is easy to perform, but also the ion generating means can be attached to the air delivery side of an existing blower, which is economical.

  First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the blower ion generator A according to the first embodiment includes an ion generator 1 and a blower 2. The ion generating means 1 includes a housing 4 provided with an air outlet 3 on the front surface. As shown in FIG. 2, the housing 4 is open on the back side and has a housing 5 for housing the blower 2 therein. The blower 2 includes a rectangular tube-shaped frame 6 corresponding to the accommodating portion 5, and a propeller fan 7 is supported in the frame 6. The propeller fan 7 is rotationally driven by a motor (not shown) and forcibly takes in air from the back side of the frame 6 and sends it forward. An air outlet 3 of the ion generating means 1 is located on the air sending side of the blower 2.

  As shown in FIGS. 1 and 2, the air outlet 3 is formed by an outer cylinder portion 8 and an inner cylinder portion 9. The outer cylinder part 8 is made of metal and is formed in a cylindrical shape having a peripheral wall corresponding to the outer diameter of the rotation circumference of the propeller fan 7. The inner cylinder portion 9 is made of an insulating material such as a synthetic resin, and is formed in a cylindrical shape having a peripheral wall located inside the outer cylinder portion 8 and facing the entire circumference of the outer cylinder portion 8 with a predetermined gap. Is formed. The outer cylinder portion 8 is connected to the front wall of the housing 4, and the inner cylinder portion 9 is connected to the housing 4 via a connecting member (not shown). As shown in FIG. 2, the annular gap formed between the outer cylinder portion 8 and the inner cylinder portion 9 communicates with the inside and outside of the housing 4, thereby forming the annular air outlet 3. .

  Further, as shown in FIG. 2, the inner cylinder portion 9 is closed at the end facing the blower 2 by a closing plate 10, and the downstream end of the air outlet 3 is made of an insulating material such as synthetic resin. The front panel 11 is closed. A power supply chamber 12 is formed by a space inside the inner cylinder portion 9, and an AC high voltage power supply 13 is accommodated in the power supply chamber 12. The AC high-voltage power supply 13 is small and lightweight by adopting a high-frequency power source such as a high-frequency transformer or a piezoelectric transformer, and is accommodated in the power supply chamber 12 in a compact manner.

  Further, the inner cylinder portion 9 is provided with a discharge electrode 14 to which a high voltage is applied by an AC high voltage power source 13. As shown in FIG. 3 with the front panel 11 removed, the discharge electrode 14 includes an annular base portion 15 formed by forming a metal rod-like body in an annular shape, and is integrally fitted and connected to the annular base portion 15 so as to have a predetermined interval. And a plurality of discharge needles 16 made of metal with sharp tips arranged radially. As shown in FIG. 2, the annular base portion 15 is held by a circular support plate 17 made of an insulating material such as a synthetic resin fitted to the inner cylinder portion 9, and each discharge needle 16 penetrates the inner cylinder portion 9. And it protrudes to the air outlet 3. An AC high voltage power supply 13 is connected to the annular base 15 via a high voltage cable 18.

  As shown in FIGS. 2 and 3, a metal outer cylinder portion 8 is opposed to the discharge electrode 14, and the outer cylinder portion 8 is grounded by a ground wire 19, whereby the outer cylinder portion. 8 is a counter electrode, and the discharge electrode 14 and the outer cylinder portion 8 which is the counter electrode constitute a corona discharge generating electrode.

  The blower-type ion generator A having the above configuration applies a high voltage from the AC high-voltage power supply 13 to the discharge electrode 14, thereby forming a high voltage formed between the discharge needle 16 and the outer cylinder portion 8 at the air outlet 3. The electric field concentrates on the tip of the discharge needle 16 and corona discharge occurs. And air ion is produced | generated by the corona discharge at this time, and when the air flow from the air blower 2 passes the air blowing port 3, air ion is blown out from the air blowing port 3 with an air flow. The air ions blown out from the air outlet 3 in this way are transferred to the charged object at a position separated from the air flow, and can neutralize the static electricity of the charged object and efficiently eliminate the static electricity.

  At this time, since the air outlet 3 is formed by a gap between the outer cylinder part 8 and the inner cylinder part 9, the flow area of the air flow sent from the blower 2 is relatively narrow, and the air flow rate is high. Thus, a large amount of air ions generated at the air outlet 3 can be sent out. In addition, since the outer cylinder portion 8 constituting the air outlet 3 has a peripheral wall corresponding to the outer diameter of the rotation circumference of the propeller fan 7, most of the air flow to which the centrifugal force is applied by the propeller fan 7 is made efficient. The air can be blown out from the air blowing port 3 well. Further, since the air flow formed by the propeller fan 7 is small in the central portion, the power supply chamber 12 is formed in the inner cylinder portion 9 located in the central portion where the air flow is small, and the AC high-voltage power supply 13 is accommodated. The whole can be formed extremely compact.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the blower-type ion generator B of the second embodiment, the outer cylinder portion 20 is made of an insulating material such as a synthetic resin. A metal cylindrical member 22 that is grounded via a ground wire 21 is attached to the outer periphery of the outer cylindrical portion 20, and a counter electrode is configured by the cylindrical member 22. Since other configurations are the same as those of the first embodiment, the same reference numerals as those in FIGS. 1 to 3 are given and description thereof is omitted.

  In the blower type ion generator B of the second embodiment, since the outer cylindrical member 22 faces the discharge needle 16 of the discharge electrode 14 through the outer cylinder portion 20 made of an insulating material, corona discharge is further ensured. Can be generated. That is, when a high voltage is applied to the discharge electrode, a high electric field formed between the discharge needle 16 and the cylindrical member 22 at the air outlet 3 is concentrated on the tip of the discharge needle 16 to generate corona discharge. At this time, since the outer cylinder portion 20 made of an insulating material is interposed between the discharge needle 16 and the cylindrical member 22, it is possible to prevent a transition from corona discharge to spark discharge. Thereby, not only can the generation of corona discharge be stably and reliably obtained, but also a decrease in the amount of air ions, damage to both electrodes, generation of noise, and the like accompanying spark discharge can be prevented.

  Here, in the first and second embodiments described above, an annular base portion 15 formed by forming a metal rod-like body into an annular shape, and a plurality of metallic discharges integrally fitted and connected to the annular base portion 15. Although the discharge electrode 14 constituted by the needle 16 was used, other than that, as shown in FIGS. 6 and 7, a metal plate annular base portion 23 and an outer peripheral edge of the plate annular base portion are predetermined in the circumferential direction thereof. It is possible to use a discharge electrode 25 constituted by a plurality of sharp-toothed protrusions 24 formed integrally with a space therebetween. In this case, the flat plate base 23 is supported by an insulating support plate 17 fitted to the inner cylinder 9 (see FIG. 1), and the AC high voltage power supply 13 (see FIG. 1) is connected via the high voltage cable 18. To do. Each serrated projection 24 penetrates the peripheral wall of the inner cylinder portion 9 and projects to the air outlet 3. By doing so, not only the same effects as those of the first and second embodiments described above can be obtained, but also the discharge electrode 25 can be easily punched out from a metal plate material, so that it is inexpensive.

  Further, in the first and second embodiments described above, the discharge electrode 26 shown in FIGS. 8 to 10 may be employed. As shown in FIG. 8, this discharge electrode 26 is similar to the above-mentioned discharge electrode 25 in that it includes a flat plate-shaped annular base 23 and a sawtooth projection 24. However, FIG. 9 is a rear view and FIG. As shown in FIG. 10, a metal plate annular member 27 is superposed via a support plate 17 (flat plate member) made of an insulating material, and the AC high voltage power source 13 (FIG. 1) is connected to the plate annular member 27 via a high voltage cable 18. Connect). At this time, the flat plate base 23 and the flat plate member 27 are concentrically opposed to each other. By so doing, a so-called parallel plate capacitor is constituted by the flat plate annular base 23 and the flat plate annular member 27 sandwiching the support plate 17 made of an insulating material, and the AC high voltage power supply 13 receives a sawtooth projection 24 via a capacitor. A high voltage is applied to. According to this, not only the same effects as those of the first and second embodiments described above can be obtained, but also foreign objects come into contact with each sawtooth protrusion 24 by applying an alternating high voltage through a capacitor. However, it is possible to suppress a large short-circuit current from flowing.

  Furthermore, in the first and second embodiments described above, the discharge electrode 28 shown in FIG. 11 may be employed. The discharge electrode 28 is configured by arranging a plurality of arc base portions 29 formed in an arc shape in an annular shape at predetermined intervals, and providing each arc base portion 29 with one or more serrated projections 24. . According to this, the connection capacity at each arc base 29 is reduced, and the short-circuit current can be more reliably suppressed.

  Next, a third embodiment of the present invention will be described with reference to FIGS. In the blow type ion generator C of the third embodiment, both the outer cylinder part 30 and the inner cylinder part 9 are made of an insulating material such as synthetic resin. As shown in FIG. 14, a plurality of positive high-voltage terminal blocks 31 and a plurality of negative high-voltage terminal blocks 32 are alternately supported on the support plate 17 made of an insulating material fitted to the inner cylinder portion 9. ing. A positive discharge needle 33 is integrally provided on the positive high-voltage terminal block 31 to be a positive discharge electrode, and a negative discharge needle 34 is integrally provided on the negative high-voltage terminal block 32 to be a negative discharge electrode. Has been. As shown in FIG. 13, a DC high voltage power supply 35 is accommodated in the power supply chamber 12 inside the inner cylinder portion 9, and as shown in a state in which the front panel 11 is removed in FIG. The positive high-voltage cable 36 is connected to the positive output terminal 37 of the DC high-voltage power supply 35, and the negative high-voltage terminal block 32 is connected to the negative output terminal 39 of the DC high-voltage power supply 35 via the negative high-voltage cable 38. ing. Since other configurations are the same as those of the first embodiment, the same reference numerals as those in FIGS. 1 to 3 are given and description thereof is omitted.

  In the blower type ion generator C of the third embodiment, with the above configuration, the positive output voltage of the DC high-voltage power supply 35 is applied to the positive high-voltage terminal block 31, and the negative output voltage of the DC high-voltage power supply 35 is When applied to the negative high voltage terminal block 32 and a high electric field concentrates between the positive discharge needle 33 and the negative discharge needle 34, positive and negative corona discharges are generated. Positive and negative air ions can be generated by the corona discharge, and positive and negative air ions can be sent out from the air outlet 3 by the air flow from the blower 2. And also in the blast type ion generator C of the third embodiment, air ions generated at the air outlet 3 by the air having a high flow velocity are obtained in the same manner as in the first and second embodiments described above. A large amount can be sent out, and most of the air flow to which the centrifugal force is applied by the propeller fan 7 can be efficiently blown out from the air outlet 3. And the DC high voltage power supply 35 can be accommodated in the power supply chamber 12 of the inner cylinder part 9, and the whole apparatus can be formed very compactly.

  Next, the 4th Embodiment of this invention is described based on FIG.15 and FIG.16. The blower ion generator D of the fourth embodiment has the same main configuration as that of the first embodiment described above, but the first embodiment is that the discharge electrode 14 is detachably provided. The form is different. That is, as shown in FIG. 15 and FIG. 16, the screw member 40 penetrating through the center portion of the front panel 11 is attached to the mounting base 41 provided on the closing plate 10 of the inner cylinder portion 9, thereby discharging. An electrode 14 and a support plate 17 are attached to the inner cylinder portion 9. Further, the high voltage cable 18 extending from the AC high voltage power supply 13 is detachably connected by a socket member 42 connected to the annular base portion 15 of the discharge electrode 14. According to this, it is possible to remove the support plate 17 and the discharge electrode 14 together with the front panel 11 from the inner cylinder portion 9 by simply removing the screw member 40 from the mounting base 41, and to connect the AC high voltage power source 13 to the socket member 42. For example, the discharge electrode 14 can be cleaned at another location, or the discharge electrode 14 can be replaced, and maintenance work can be easily performed. Note that this configuration can be applied not only to the first embodiment but also to the second and third embodiments, and the discharge electrodes 25 and 26 having other configurations described above. , 28 is also applicable.

  Next, a fifth embodiment of the present invention will be described with reference to FIGS. The blowing type ion generator E of 5th Embodiment is comprised by the ion production | generation means 43 and the air blower 44, as shown in FIG.17 and FIG.18. The ion generating means 43 includes a first flange portion 45 that projects to the outer periphery of the front air outlet 3. The blower 44 includes a rectangular tube-shaped frame 46 and a second flange portion 47 projecting to the outer periphery of the frame 46, and supports the propeller fan 7 in the frame 46. The air outlet 3 of the ion generating means 43 is formed by the outer cylinder part 8 and the inner cylinder part 9, and this configuration is the same as that of the first embodiment. And in the ventilation type ion generator E of 5th Embodiment, the 1st flange part 45 of the ion production | generation means 43 and the 2nd flange part 47 of the air blower 44 are connected by the screw member 48, and, thereby, an ion production | generation means 43 and the blower 44 are integrated. Further, a rectangular tube-shaped exterior frame 49 is provided on the outer periphery of the blower 44. The exterior frame 49 is provided as necessary, and may be omitted if unnecessary. The blow type ion generating apparatus E of the fifth embodiment can be configured more compactly by the above configuration, and can be connected to the existing blower 44 via the screw member 48, for example. . In addition, as shown in FIGS. 19 and 20, the ion generating means 43 can be detachably connected to a blower 51 having a rectangular tube-shaped frame 50. That is, by providing a detachable connector 52 on the first flange portion 45 and the frame 50 of the blower 51, not only can the ion generating means 43 be added to the existing blower 51, but also from the blower 51. Removal of the ion generating means 43 is also facilitated.

  As described above, the blast ion generator of the present invention can employ various configurations as described in the embodiments, but the inventor further includes the blast ion generator of the present invention. The test which compares the static elimination effect with the conventional ventilation type ion generator was conducted, and it confirmed that the static elimination characteristic of the ventilation type ion generator of this invention was favorable. Therefore, the static elimination characteristics of the blower ion generator of the present invention confirmed by this test will be described.

  First, a description will be given of a test apparatus that performs a characteristic test of the blower ion generator. As shown in FIG. 21, the test apparatus employs a charged plate monitor 54 that measures the charge decay time and ion balance of the metal plate 53. Has been. The charging plate monitor 54 supports the metal plate 53 of 150 mm square on the side surface of the main body 55 via a support portion 56 made of an insulator. The metal plate 53 simulates a charged object to be neutralized. The main body 55 incorporates a surface potential measuring device 57, a high voltage power source 58, and a timer 59, and the metal plate 53 is given a charge from the high voltage power source 58. The voltage of the metal plate 53 is measured by the surface potential measuring device 57, and the decay time of the voltage is measured by the timer 59.

  Then, a blowing ion generator B ′ of the present invention or a conventional blowing ion generator is disposed at one side of the charging plate monitor 54 with a predetermined distance L. Air ions generated in the blower ion generator B ′ are transferred to the metal plate 53 of the charging plate monitor 54 by an air flow. At this time, for example, when positive and negative ions in the air are biased, charges are accumulated in the metal plate 53, and the absolute value of the voltage increases. This voltage is called an offset voltage and serves as an index of ion balance. Further, the metal plate 53 is charged to ± 1000 V by the high-voltage power source 58, neutralized by applying air ions sent from the blower ion generator B ′ to this, and the decay time required to decrease to ± 100 V is obtained. taking measurement.

  The blowing ion generator B ′ of the present invention in this test uses the blowing ion generator B shown in the second embodiment, and instead of the discharge electrode 14, the flat plate annular base 23 and the sawtooth shown in FIG. The discharge electrode 25 constituted by the projections 24 was employed. In addition, the front shape of the blast type ion generator B ′ of the present invention was a square having a length of 140 mm and a width of 140 mm.

  In addition, although not shown in the figure, a conventional blower ion generator employs a casing front shape that is 170 mm long and 140 mm wide, and a blower is provided inside the case. A cylindrical air outlet opening is provided. Inside the air outlet, a discharge electrode having eight discharge needles arranged radially on the outer periphery of an annular metal rod is attached, and the outer periphery of the air outlet is grounded. The one provided with a metal cylindrical counter electrode was used.

  Both high-voltage power supplies are composed of piezoelectric transformers, and the effective value of the output voltage is 2 kV and the frequency is 63 kHz. The distance L was 300 mm, and the air flow velocity at the position of the metal plate 53 was about 1.5 m / s.

  Table 1 shows a comparison result between the blower ion generator B ′ of the present invention and the conventional blower ion generator.

表１においては、本発明の送風式イオン生成装置Ｂ´を用いた場合と従来の送風式イオン生成装置を用いた場合とで、除電による金属製プレート５３における電圧の減衰時間（秒）と、イオンバランスを示すオフセット電圧（Ｖ）とを比較した。表１に示すように、本発明のものは、従来のものと同等の除電特性が得られており、更に、本発明のものは従来のものに比して、正負の電圧の減衰時間に偏りが少ないため、空気イオンが正負共に効率よく金属製プレート５３に供給されることが判る。

In Table 1, the voltage decay time (seconds) in the metal plate 53 due to static elimination, when using the blower ion generator B ′ of the present invention and when using the conventional blower ion generator, The offset voltage (V) indicating ion balance was compared. As shown in Table 1, according to the present invention, the static elimination characteristics equivalent to those of the conventional one are obtained, and the present invention is biased toward the decay time of positive and negative voltages as compared with the conventional one. Therefore, it can be seen that air ions are efficiently supplied to the metal plate 53 in both positive and negative directions.

The front view of the ventilation type | formula ion generator of the 1st Embodiment of this invention. II-II sectional view taken on the line of FIG. The explanatory front view which removes and shows a part of ventilation type | mold ion generator of 1st Embodiment. The front view of the ventilation type | formula ion generator of the 2nd Embodiment of this invention. VV sectional view taken on the line of FIG. The front view which shows the structure of another discharge electrode. VII-VII sectional view taken on the line of FIG. The front view which shows the structure of another discharge electrode. Explanatory drawing which shows the back surface side of the discharge electrode of FIG. XX sectional drawing of FIG. The front view which shows the structure of another discharge electrode. The front view of the ventilation type | formula ion generator of the 3rd Embodiment of this invention. XIII-XIII sectional view taken on the line of FIG. The explanatory front view which removes and shows a part of ventilation type | mold ion generator of 3rd Embodiment. The front view of the ventilation type | formula ion generator of the 4th Embodiment of this invention. FIG. 16 is a sectional view taken along line XVI-XVI in FIG. 15. The front view of the ventilation type | mold ion generator of the 5th Embodiment of this invention. XVIII-XVIII sectional view taken on the line of FIG. The front view which shows the other example in the ventilation type | formula ion generator of 5th Embodiment. The side view of the ventilation type | formula ion generator of FIG. Explanatory drawing which shows schematic structure of the test apparatus which evaluates static elimination characteristics.

Explanation of symbols

  A, B, B ', C, D, E ... Air blowing type ion generator, 1, 43 ... Ion generating means, 2, 44, 51 ... Air blower, 7 ... Propeller fan, 3 ... Air outlet, 8, 20, DESCRIPTION OF SYMBOLS 30 ... Outer cylinder part, 9 ... Inner cylinder part, 13 ... AC high voltage power supply, 12 ... Power supply chamber, 14, 25, 26, 28 ... Discharge electrode, 15 ... Annular base, 16 ... Discharge needle, 17 ... Support plate (flat plate) Members), 18, 36, 38 ... high pressure cable, 22 ... cylindrical member, 23 ... flat plate annular base, 24 ... sawtooth projection, 27 ... flat plate annular member, 29 ... arc base, 33 ... positive discharge needle (positive discharge) Electrode), 34 ... negative discharge needle (negative discharge electrode), 35 ... direct current high voltage power source.

Claims (10)

A blower for sending air by rotation of a propeller fan; and an ion generating means for generating air ions located on the air sending side of the blower, and the air ions generated by the ion generating means are converted into air from the blower. In the blower type ion generator transferred by the flow,
The ion generating means includes an air outlet for guiding the air sent from the blower in a blowing direction, an AC high voltage power source that outputs an AC high voltage, and a corona discharge when a high voltage is applied from the AC high voltage power source. And a corona discharge generating electrode that generates air ions from this corona discharge,
The air outlet has a cylindrical outer cylinder portion having a peripheral wall corresponding to the outer diameter of the rotation circumference of the propeller fan, and is located on the inner side of the outer cylinder portion and has a predetermined circumference around the peripheral wall of the outer cylinder portion. It is formed in an annular shape by a gap between the cylindrical inner cylinder part having a surrounding wall facing the gap,
The AC high-voltage power supply is housed in a power supply chamber formed by closing both axial ends of the inner cylinder portion,
The corona discharge generating electrode is disposed facing the air outlet, is provided on the inner cylinder portion, and is provided on the outer cylinder portion with a discharge electrode to which a high voltage is applied by the AC high voltage power source. A blower-type ion generator comprising: a grounded counter electrode facing the discharge electrode.   The blower ion generator according to claim 1, wherein the counter electrode is formed by the grounded metal outer cylinder portion.   The blower ion generator according to claim 1, wherein the counter electrode is formed of a metal cylindrical member that is attached to and grounded on an outer periphery of the outer cylinder portion made of an insulating material.   The discharge electrode is provided on the inner surface side of the inner wall of the inner cylinder portion and connected to the AC high-voltage power source via a high-voltage cable, and the discharge electrode has a predetermined interval in the circumferential direction of the annular base portion. 4. A plurality of sharp discharge tips that are formed integrally with the annular base and project through the peripheral wall of the inner cylinder and project to the air outlet. The blow type ion generator according to claim 1.   The discharge electrode is provided on the inner surface of the inner wall of the inner wall and connected to the AC high-voltage power source via a high-voltage cable, and a predetermined circumferentially outer peripheral edge of the flat plate base. It is formed integrally with the flat plate annular base with a gap, and is composed of a plurality of sharp saw-tooth projections penetrating the peripheral wall of the inner cylinder portion and projecting to the air outlet. The ventilation type | formula ion generator of any one of Claims 1 thru | or 3.   The flat plate annular base is polymerized via a flat plate member made of an insulating material to a flat metal plate annular member of the same shape facing the flat plate annular base, and the flat plate annular member is connected to the AC high voltage power source via the high voltage cable. 6. The blower type ion generator according to claim 5, wherein an AC high voltage is applied to the flat plate base through a capacitor by connecting.   The flat plate annular base is formed by arranging a plurality of arc bases formed in an arc shape in an annular shape at a predetermined interval, and each arc base portion is provided with one or more sawtooth projections. The blower type ion generator according to claim 6 characterized by things. A blower for sending air by rotation of a propeller fan; and an ion generating means for generating air ions located on the air sending side of the blower, and the air ions generated by the ion generating means are converted into air from the blower. In the blower type ion generator transferred by the flow,
The ion generation means includes an air outlet that guides air sent from the blower in a blowing direction, a DC high-voltage power supply that outputs positive and negative DC high voltages separately, and a high voltage applied from the DC high-voltage power supply. And a corona discharge generating electrode for generating corona discharge and generating air ions from the corona discharge,
The air outlet has a cylindrical outer cylinder portion having a peripheral wall corresponding to the outer diameter of the rotation circumference of the propeller fan, and is located on the inner side of the outer cylinder portion and has a predetermined circumference around the peripheral wall of the outer cylinder portion. It is formed in an annular shape by a gap between the cylindrical inner cylinder part having a surrounding wall facing the gap,
The DC high-voltage power supply is housed in a power supply chamber formed by closing both axial ends of the inner cylinder portion,
The corona discharge generating electrode is disposed facing the air outlet, is provided on the inner cylinder portion, and a positive discharge electrode to which a positive high voltage is applied by the DC high-voltage power source, and the positive discharge A blower type ion generator comprising: a negative discharge electrode which is provided in the inner cylinder portion adjacent to an electrode and to which a negative high voltage is applied by the DC high voltage power source.   9. The discharge electrode is supported by a support member that is detachably attached to the inner cylinder part, and is removable from the inner cylinder part integrally with the support member. The blower type ion generator of any one of these.   The blower type ion generator according to any one of claims 1 to 9, wherein the ion generation means is detachably connected to a frame that houses a propeller fan of the blower.

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