JP2008287952A - Blast type ion generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blast type ion generating device in which a high destaticizing effect is obtained and cleaning of dust attaching to a discharge electrode can be carried out very easily, without contaminating the surrounding, while preventing leakage of high voltage. <P>SOLUTION: An air rectifying member 5 formed by an insulator is installed at an air blowing port 2 of a case 4. A destaticizing electrode 7 is installed at the tip of the air rectifying member 5. The destaticizing electrode 7 is constituted of an electric field forming electrode part 8 on which a high voltage is impressed and a discharge electrode part 9 is grounded. The electric field forming electrode part 8 is constituted of a metal pipe 10, which is connected to an AC high voltage power supply 14 via a high voltage transmission cable 13 and an insulating pipe 11, which covers the metal pipe 10 in a non-exposure state. The discharge electrode part 9 is constituted of a discharge electrode member 17, in which a plurality of discharge needles 19 are arranged at the base part 18 of a metallic rod-shape with a prescribed spacing and a support member 16, which detachably supports the discharge electrode member 17. <P>COPYRIGHT: (C)2009,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 a charged body.

  Conventionally, a static elimination electrode and an AC high voltage power source for supplying a high voltage to the static elimination electrode and a blower are provided, and positive and negative air ions generated by the static elimination electrode are transferred toward a charged body by an air flow of the blower. There is known a blower type ion generating apparatus that neutralizes a charged body (for example, see Patent Document 1).

  A static elimination electrode employed in this type of blown ion generator includes a discharge electrode portion having a plurality of discharge needles arranged at predetermined intervals, and a ground electrode provided to face the discharge electrode portion By applying a voltage from an AC high voltage power supply to the discharge electrode part, a corona discharge is generated between the two electrodes to generate positive and negative air ions. That is, when a positive voltage is applied to the discharge electrode portion, negative ions of the generated positive and negative air ions move toward the discharge needle, and positive ions move toward the ground electrode portion. Here, most of the positive ions are captured by the ground electrode portion, but some of the positive ions are released toward the charged body beyond the ground electrode portion. In addition, when a negative voltage is applied to the discharge electrode portion, a phenomenon that is completely opposite to the case where a positive voltage is applied occurs, and most of the generated positive and negative ions are grounded. The negative ions are trapped by the portion, and some negative ions are released toward the charged body beyond the ground electrode portion. In the blower-type ion generator, even a charged body located at a relatively far position in order to transfer the positive and negative air ions generated by the static elimination electrode to the air flow of the blower in this manner is good. It can be neutralized.

  However, in this type of static elimination electrode, an electric field concentrates on the tip of the discharge needle when air ions are generated. Therefore, if fine dust is floating in the air, the dust is attracted to and attached to the discharge needle. . In particular, in this type of blown ion generator, since an air flow is formed to transfer air ions, the floating of dust in the air is activated, and the amount of dust that is attracted to and attached to the discharge needle is suspended. Will increase. The dust adhering to the discharge needle covers the discharge needle with time, and the generation number of positive and negative air ions is reduced to inhibit the generation of corona discharge, so that the static elimination efficiency is deteriorated.

  Therefore, it is necessary to periodically clean the discharge needle using a brush or the like to restore the static elimination performance. However, when performing such cleaning, it is not possible to avoid scattering of dust that has peeled off from the discharge needle. In particular, in a blow-type ion generator installed in a clean room, the dust is scattered along with the cleaning of the discharge needle. There is a disadvantage that the clean room is contaminated by the dust.

On the other hand, in this type of blown ion generator, there is known a device in which a discharge needle is detachably provided from a discharge electrode portion (see, for example, cited document 2). According to this, the discharge needle can be removed from the discharge electrode portion and, for example, the discharge needle can be cleaned in another place outside the clean room. However, in the case where a high voltage is applied to the discharge electrode portion from the AC high voltage power supply, there is a possibility that high voltage leakage may occur from a structure portion in which the discharge needle is detachable from the discharge electrode portion. For this reason, in the discharge electrode portion to which a high voltage is applied, there is a disadvantage that it is difficult to adopt a structure in which the discharge needle is detachable.
JP 2000-133413 A (page 4, FIG. 7) JP 2005-216539 A

  The present invention eliminates such inconvenience, and the present invention can obtain a high static elimination effect, prevent leakage of high voltage, and can perform cleaning of dust adhering to the discharge electrode extremely easily without contaminating the surroundings. An object of the present invention is to provide an ion generator.

  In order to achieve such an object, the present invention includes a housing and a blower that forcibly blows air taken from an air inlet formed in the housing from an air outlet formed in the housing. And a static elimination electrode that generates air ions by a high voltage supplied from an AC high voltage power source built in the casing, and the air ions generated by the static elimination electrode are transferred and charged by an air flow blown from an air outlet. In the blower type ion generating apparatus for performing static elimination of a body, the static elimination electrode includes an air rectifying member formed by an insulator extending outward from the casing along a direction of air blowing from a side edge of the air outlet. Comprises an electric field forming electrode portion to which a high voltage is applied, and a grounded discharge electrode portion facing the electric field forming electrode portion with a gap, and is provided at the tip of the air rectifying member, Forming electrode section A metal pipe connected to the AC high-voltage power supply via a high-voltage power transmission cable; and an insulating pipe that covers the metal pipe in an unexposed state, and the discharge electrode portion has a plurality of discharges on a metal rod-like base portion. It is characterized by comprising a discharge electrode member in which needles are arranged at a predetermined interval, and a support member for detachably supporting the discharge electrode member.

  According to the present invention, the discharge electrode portion is configured such that a discharge electrode member in which a plurality of discharge needles are disposed at predetermined intervals on a metal rod-like base is detachably supported by the support member. Therefore, before the discharge needle is covered with dust, only the discharge electrode member can be removed from the static elimination electrode, and the discharge needle of the discharge electrode member can be easily cleaned. In particular, when the blower-type ion generator is installed in a clean room, only the removed discharge electrode member can be taken out of the clean room and cleaned so that dust can be reliably prevented from scattering into the clean room. .

  Further, since the discharge electrode member can be removed from the support member while the base and the plurality of discharge needles are integrated, not only can the removal and attachment work be performed very quickly, but also, for example, a plurality of discharge electrode members having the same shape are prepared. Then, after removing the discharge electrode member to which dust has adhered, it can be immediately replaced with a new discharge electrode member or a discharge electrode member that has already been cleaned. The time during which the operation is interrupted can be drastically reduced.

  Further, the static elimination electrode in the present invention does not apply a high voltage to the discharge electrode part, but applies a high voltage to the electric field forming electrode part, and the discharge electrode part forms a ground circuit. Even if the configuration in which the electrode member is detachably supported by the support member is employed, there is no possibility that a high voltage leaks from between the support member and the discharge electrode member. In addition, since the metal pipe to which a high voltage is applied is covered with the insulating pipe in an unexposed state in the electric field forming electrode part, leakage of the high voltage from the electric field forming electrode part can be reliably prevented.

  By the way, for example, in the case where the static elimination electrode is accommodated in the housing to form the blow type ion generator, the housing is a metal grounding body, or other parts are metal grounding bodies. As a result, an electric field from the electric field forming electrode portion toward the housing and other parts is also formed, so that the concentration of the electric field on the discharge electrode portion becomes insufficient, and the number of generated air ions is reduced. Therefore, the present invention provides the air rectifying member formed of an insulator and holds the static elimination electrode at a position separated from the casing via the air rectifying member, so that the electric field from the electric field forming electrode portion is discharged. It can be reliably concentrated on the electrode portion, and a sufficient amount of air ions can be generated.

  And as a 1st aspect of this invention which can acquire the above-mentioned effect, the said air rectification member is formed in a cylindrical shape, and the rear-end part is connected with the side edge of the said air blower outlet, The said electric field formation electrode The discharge electrode member is formed in an annular shape concentric with the electric field forming electrode portion and is formed inside the electric field forming electrode portion. It is mentioned that it is detachable.

  Further, as a second aspect of the present invention capable of obtaining the above-described effect, the air rectifying member is formed in a pair of flat plates facing each other through the air outlet, and the respective rear end portions thereof are Connected to the side edge of the air outlet, a pair of the electric field forming electrode portions are provided, each of which is provided at the tip of each air rectifying member, and the discharge electrode members of the discharge electrode portions are both electric field forming electrode portions. It is mentioned that it is provided detachably between.

  Further, as a third aspect of the present invention capable of obtaining the above-described effect, the air rectifying member is formed in a cylindrical shape, and a rear end portion thereof is connected to a side edge of the air outlet, and the discharge electrode portion The discharge electrode member is formed in an annular shape and is detachably held at the tip of the air rectifying member, and the electric field forming electrode portion is formed in an annular shape concentric with the discharge electrode member, Is provided.

  Further, as a fourth aspect of the present invention capable of obtaining the above-described effect, the air rectifying member is formed in a pair of flat plates facing each other through the air outlet, and the respective rear end portions thereof are Connected to the side edge of the air outlet, a pair of discharge electrode members of the discharge electrode portion are provided, each of which is detachably held at the tip of each air rectifying member, and the electric field forming electrode portion is It is mentioned that it is provided between electrode members.

  Further, in the present invention, the discharge electrode portion is replaced with a discharge electrode member in which a plurality of discharge needles are disposed at predetermined intervals on a metal rod-shaped base portion, and a sawtooth is formed on one side edge of the long flat plate-like base portion. A discharge electrode member in which a plurality of discharge protrusions having a sharp tip shape are formed may be provided. Also at this time, the discharge electrode member is detachably supported by the support member.

  A discharge electrode member in which a plurality of sawtooth-shaped sharpened discharge protrusions are formed on one side edge of a long flat plate-like base can be formed very easily, for example, by punching from a metal plate material, etc. Can be manufactured. In addition, since it is formed in a flat plate shape from the base portion to the sawtooth discharge protrusion, not only has little resistance to the air flow from the air outlet, but also a rectifying action of this air flow can be obtained. The air ions are more smoothly transferred by the flow.

  Further, in the present invention, the electric field forming electrode portion includes a high voltage power transmission cable in which a metal core wire is covered with insulation instead of the metal pipe, and the high voltage power transmission cable is covered with the insulation pipe in an unexposed state. It may be formed.

  Thus, the electric field forming electrode part can be formed using the high-voltage power transmission cable and can be manufactured at low cost. In addition, since the electric field forming electrode portion is formed in a state where the high-voltage power transmission cable is accommodated in the insulating pipe, for example, even if a situation such as the presence of a pinhole in the insulating pipe or damage to the insulating pipe occurs, Since the high-voltage power transmission cable has the metal core wire coated with insulation, the insulation state of the metal core wire is reliably maintained, and high voltage leakage can be reliably prevented.

  In the present invention, a mantle member may be provided that is located outside the air rectifying member and that surrounds the static elimination electrode by opening at least a passage range of an air flow blown from the air outlet. For example, when a grounding body such as a human body approaches the static elimination electrode, an electric field from the electric field forming electrode portion toward the approaching grounding body is also formed, so that the concentration of the electric field on the discharge electrode portion becomes insufficient, and the number of generated air ions Decrease. Therefore, by providing the outer cover member, it is possible to suppress the formation of an electric field on the grounded body that is approached, and it is possible to reliably concentrate the electric field from the electric field forming electrode portion on the discharge electrode portion.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory perspective view showing the appearance of a blown-type ion generator of the first embodiment, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a blown-type ion generator of the second embodiment. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is an explanatory perspective view showing the appearance of the blower-type ion generator of the third embodiment, and FIG. VI-VI sectional view, FIG. 7 is an explanatory perspective view showing the appearance of the blower type ion generator of the fourth embodiment, FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 7, and FIG. FIG. 10 is a cross-sectional view showing another electric field forming electrode part, FIG. 11 is an explanatory perspective view showing an example of the state of attachment of the mantle member, and FIG. 12 evaluates the characteristics of the blower type ion generator. It is a schematic block diagram of the test apparatus to perform.

  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 1 of the first embodiment includes a housing 4 in which an air outlet 2 is formed on the front surface and an air intake port 3 is formed on the rear surface. Yes. The air outlet 2 is provided with a cylindrical air rectifying member 5 formed of an insulator. A blower 6 is provided inside the housing 4. The blower 6 forcibly takes air from the air intake 3 into the housing 4 and then blows it out from the air outlet 2 to the outside of the housing 4 to form an air flow. The air rectifying member 5 rectifies the air blown from the air outlet 2.

  A static elimination electrode 7 is held on the air rectifying member 5. The static elimination electrode 7 is composed of an electric field forming electrode portion 8 and a discharge electrode portion 9. The electric field forming electrode portion 8 is formed in an annular shape and is attached along the front end edge of the air rectifying member 5. As shown in FIG. 2, the electric field forming electrode portion 8 is formed by covering a metal pipe 10 with an insulating pipe 11 in an unexposed state. The metal pipe 10 is connected to a high-voltage power transmission cable 13 through a wiring hole 12 formed in the air rectifying member 5. The high voltage power transmission cable 13 is connected to an AC high voltage power supply 14 accommodated in the housing 4. A high voltage is applied to the electric field forming electrode unit 8 by an AC high voltage power supply 14. At this time, since the metal pipe 10 of the electric field forming electrode portion 8 is covered with the insulating pipe 11 in an unexposed state, high voltage leakage is reliably prevented.

  As shown in FIGS. 1 and 2, the discharge electrode portion 9 includes a support member 16 provided on a plurality of support blocks 15 formed on the inner wall of the air rectifying member 5, and a discharge electrode member supported by the support member 16. 17. As shown in FIG. 2, the discharge electrode member 17 is formed by a metal base 18 and a plurality of discharge needles 19 attached integrally to the base 18. The base 18 is formed in an annular shape that is concentric with the electric field forming electrode portion 8 and has a small diameter. The discharge needles 19 are arranged on the front peripheral surface of the base 18 with a predetermined interval and are provided so as to protrude forward. ing. The support member 16 is formed of an elastic metal plate, detachably supports the discharge electrode member 17, and is grounded via the lead wire 20. The discharge member 17 is supported by the support member 16 in a state where the discharge electrode member 17 is grounded inside the air rectifying member 5 with an appropriate gap in the electric field forming electrode portion 8.

  When the switch 21 (shown in FIG. 1) provided on the front surface of the housing 4 is turned on and a high voltage is applied to the electric field forming electrode unit 8 from the AC high voltage power supply 14, the electric field forming electrode unit 8 A high electric field is formed toward the grounded discharge electrode portion 9, and positive and negative air ions are generated by corona discharge. At this time, the blower 6 is also driven by turning on the switch 21, and air ions can be transferred by the air flow formed by the air rectifying member 5.

  The blow type ion generating apparatus 1 of the first embodiment is configured so that the discharge electrode member 9 is configured as described above, whereby the discharge electrode member 17 is detached from the support member 16 and dust attached to the discharge needle 19 is easily removed. Can be cleaned. Further, since the discharge electrode portion 9 constitutes a ground circuit, even if the discharge electrode member 18 is detachably supported by the support member 16, there is no leakage of high voltage. Furthermore, by holding the static elimination electrode 7 on the air rectifying member 5 formed of an insulator, the electric field forming electrode portion 8 and the housing 4 can be separated from each other, and the electric field forming electrode portion 8 and the housing 4 can be separated. Since the discharge electrode portion 9 is located between the front surface and the front surface, for example, even if the housing 4 is a metal grounding body, an electric field is hardly formed between the electric field forming electrode portion 8 and the housing 4. Can be concentrated on the discharge needle 19 of the discharge electrode portion 9 to generate air ions efficiently. Then, the air ions generated inside the front end portion of the air rectifying member 5 by the static elimination electrode 7 are transferred to a charged body at a position away from the air flow blown out from the air outlet 2 by the blower 6 and charged. Neutralizes the static electricity of the body and can remove electricity efficiently.

  Next, 2nd Embodiment is described based on FIG.3 and FIG.4. As shown in FIGS. 3 and 4, the blower ion generator 101 of the second embodiment includes a horizontally long case 104, and the front surface of the case 104 follows the shape of the case 104. A horizontally long air outlet 102 is formed. An air intake 103 is formed on the bottom surface of the housing 104, and a blower 106 is provided above the air intake 103 inside the housing 104. The air outlet 102 is provided with a pair of upper and lower air rectifying members 105 formed in a plate shape by an insulator. In the present embodiment, a square cylindrical body formed of an insulator is provided, and a pair of air rectifying members 105 are configured on the top and bottom thereof.

  A static elimination electrode 107 is provided at the tip of each air rectifying member 105. The static elimination electrode 107 is composed of a pair of electric field forming electrode portions 108 and a discharge electrode portion 109 provided between both electric field forming electrode portions 108. The electric field forming electrode portions 108 are formed in a straight bar shape, and are arranged in parallel to each other along the leading edge of the air rectifying member 105. As shown in FIG. 4, the electric field forming electrode portion 108 is formed by covering a metal pipe 110 with an insulating pipe 111 in an unexposed state, with one end portion being a lead flange 122 and the other end portion being an end flange 123. It is supported. Although not shown, the metal pipes 110 of both electric field forming electrode portions 108 are connected to the high-voltage power transmission cable 113 inside the lead flange 122 and the end flange 123, and the high-voltage power transmission cable 113 is accommodated inside the housing 104. The AC high voltage power supply 114 is connected. A high voltage is applied to the electric field forming electrode unit 108 by an AC high voltage power source 114. At this time, since the metal pipe 110 of the electric field forming electrode portion 108 is covered with the insulating pipe 111 in an unexposed state, leakage of high voltage is reliably prevented.

  The discharge electrode portion 109 includes a support member 116 provided on the inner surfaces of the lead flange 122 and the end flange 123, and a discharge electrode member 117 whose both ends are supported by the support member 116. The discharge electrode member 117 is formed by a metal straight bar-shaped base portion 118 and a plurality of discharge needles 119 integrally attached to the base portion 118. The discharge needles 119 are arranged on the front peripheral surface of the base 118 at a predetermined interval and are provided so as to protrude forward. The support member 116 is formed of an elastic metal plate, detachably supports the discharge electrode member 117, and is grounded via the lead wire 120. The discharge member 117 is supported by the support member 116 while being grounded inside the air rectifying member 105 with a gap between the electric field forming electrode portions 108.

  Then, by turning on a switch (not shown) provided in the housing 104, when a high voltage is applied to both electric field forming electrode portions 108 from the AC high voltage power supply 114, both electric field forming electrode portions 108 are grounded. A high electric field is formed toward the discharge electrode portion 109, and positive and negative air ions are generated by corona discharge. At this time, the blower 106 is also driven by turning on the switch, and air ions can be transferred by the air flow formed by the air rectifying member 105.

  Also in the blower type ion generating apparatus 101 of the second embodiment, the discharge electrode member 117 is detachably provided by the support member 116, so that the dust that adheres to the discharge needle 119 is removed by removing the discharge electrode member 117. Easy to clean. Further, since the discharge electrode portion 109 constitutes a ground circuit, even if the discharge electrode member 119 is detachably supported by the support member 116, there is no leakage of high voltage. Further, the static elimination electrode 107 is located at the tip of the air rectifying member 105, the electric field forming electrode portion 108 and the housing 104 are separated from each other, and the discharge electrode is provided between the electric field forming electrode portion 108 and the front surface of the housing 104. Since the portion 109 is located, for example, even if the housing 104 is a metal grounding body, the electric field from the electric field forming electrode portion 108 is hardly formed toward the housing 104, and the electric field is discharged from the discharge electrode portion 109. Air ions can be efficiently generated by concentrating on the needle 119.

  Next, a third embodiment will be described with reference to FIGS. The blow type ion generator 201 of the third embodiment includes a housing 204 in which an air outlet 202 is formed on the front surface and an air intake port 203 is formed on the rear surface, as in the first embodiment. . As shown in FIGS. 5 and 6, the air outlet 202 is provided with a cylindrical air rectifying member 205 formed of an insulator. A blower 206 is provided inside the housing 204. The blower 206 forcibly takes air from the air intake port 203 into the housing 204 and then blows it out of the housing 204 through the air outlet 202 to form an air flow. The air rectifying member 205 rectifies the air blown out from the air outlet 202.

  The air rectifying member 205 holds a static elimination electrode 207. The static elimination electrode 207 is composed of an electric field forming electrode portion 208 and a discharge electrode portion 209. The discharge electrode portion 209 includes a plurality of support members 216 provided at the front end edge of the air rectifying member 205 and a discharge electrode member 217 supported by the support member 216. The discharge electrode member 217 is formed in an annular shape along the peripheral edge of the air rectifying member 205, and is formed by a metal base 218 and a plurality of discharge needles 219 attached integrally to the base 218. The discharge needles 219 are arranged on the front peripheral surface of the base 218 with a predetermined interval and are provided so as to protrude forward. The support member 216 is formed of an elastic metal plate, detachably supports the discharge electrode member 217, and is grounded via the lead wire 220.

  The electric field forming electrode portion 208 is formed in an annular shape that is concentric with the discharge electrode member 209 and has a small diameter, and is fixed to a plurality of support blocks 215 formed on the inner wall of the air rectifying member 205. The electric field forming electrode portion 208 is formed by covering a metal pipe 210 with an insulating pipe 211 in an unexposed state. A high voltage power transmission cable 213 extending from an AC high voltage power supply 214 housed in the housing 204 is connected to the metal pipe 210. A high voltage is applied to the electric field forming electrode unit 208 by the AC high voltage power source 214. At this time, since the metal pipe 210 of the electric field forming electrode portion 208 is covered with the insulating pipe 211 in an unexposed state, high voltage leakage is reliably prevented.

  When a high voltage is applied from the AC high voltage power source 214 to the electric field forming electrode unit 208 by turning on the switch 221 provided on the front surface of the housing 204, the discharge electrode grounded from the electric field forming electrode unit 208 A high electric field is formed toward the portion 209, and positive and negative air ions are generated by corona discharge. At this time, the blower 206 is also driven by turning on the switch 221, and air ions can be transferred by the air flow formed by the air rectifying member 205.

  The blow type ion generating apparatus 201 according to the third embodiment can easily remove dust adhering to the discharge needle 219 by removing the discharge electrode member 217 from the support member 216 by configuring the discharge electrode unit 209 as described above. Can be cleaned. At this time, since the discharge electrode member 217 is provided so as to be exposed at the tip of the air rectifying member 205, the attaching / detaching work from the support member 216 can be performed very easily during cleaning. Further, since the discharge electrode portion 209 forms a ground circuit, there is no leakage of high voltage even if the discharge electrode member 217 is detachably supported by the support member 216. In addition, since the static elimination electrode 207 is held by the air rectifying member 205 formed of an insulator, the electric field forming electrode portion 208 and the casing 204 are separated from each other. For example, the casing 204 is a metal grounding body. However, it is difficult for the electric field from the electric field forming electrode portion 208 to be formed toward the housing 204, and the electric field can be concentrated on the discharge needle 219 of the discharge electrode portion 209 to efficiently generate air ions. Then, the air ions generated inside the front end portion of the air rectifying member 205 by the static elimination electrode 207 are transferred to a charged body at a position away from the air flow blown out from the air outlet 202 by the blower 206 and charged. Neutralizes the static electricity of the body and can remove electricity efficiently.

  Next, a fourth embodiment will be described with reference to FIGS. The blow type ion generator 301 of the fourth embodiment includes a horizontally long casing 304 as in the second embodiment, and the front surface of the casing 304 is horizontally long along the shape of the casing 304. The air outlet 302 is formed. As shown in FIGS. 7 and 8, an air intake 303 is formed on the bottom surface of the housing 304, and a blower 306 is provided on the upper portion of the air intake 303 inside the housing 304. The air outlet 302 is provided with a pair of upper and lower air rectifying members 305 formed in a plate shape by an insulator.

  A static elimination electrode 307 is provided at the tip of each air rectifying member 305. The static elimination electrode 307 includes a pair of discharge electrode portions 309 and an electric field forming electrode portion 308 provided between the discharge electrode portions 309. The discharge electrode portion 309 is configured by a support member 316 provided at the leading edge of the air rectifying member 305 and a discharge electrode member 317 whose both ends are supported by the support member 316. The discharge electrode members 317 are arranged in parallel with each other along the leading edge of the air rectifying member 305, and are made of a metal linear bar-shaped base 318 and a plurality of discharge needles 319 integrally attached to the base 318. And is formed by. The discharge needles 319 are arranged on the front peripheral surface of the base portion 318 at a predetermined interval and are provided so as to protrude forward. The support member 316 is formed of an elastic metal plate, detachably supports each discharge electrode member 317, and is grounded via a lead wire 320. Each discharge electrode member 317 is supported by a support member 316 in a state of being grounded to the leading edge of the air rectifying member 305 with a gap between the upper and lower positions of the electric field forming electrode portion 308.

  The electric field forming electrode portion 308 is formed in a straight bar shape by covering the metal pipe 310 with the insulating pipe 311 in an unexposed state, and one end portion is supported by the lead flange 322 and the other end portion is supported by the end flange 323. . Although not shown in detail, the metal pipes 310 of both electric field forming electrode portions 308 are connected to the high-voltage power transmission cable 313 inside the lead flange 322 and inside the end flange 323, and the high-voltage power transmission cable 313 is accommodated inside the housing 304. Connected to the AC high voltage power source 314. A high voltage is applied to the electric field forming electrode unit 308 by an AC high voltage power source 314. At this time, since the metal pipe 310 of the electric field forming electrode portion 308 is covered with the insulating pipe 311 in an unexposed state, high voltage leakage is reliably prevented.

  When a high voltage is applied from the AC high voltage power source 314 to the electric field forming electrode unit 308 by turning on a switch (not shown) provided in the housing 304, the electric field forming electrode unit 308 is grounded. A high electric field is formed toward both discharge electrode portions 309, and positive and negative air ions are generated by corona discharge. At this time, the blower 306 is also driven by turning on the switch, and air ions can be transferred by the air flow formed by the air rectifying member 305.

  Also in the blow type ion generating apparatus 301 of the fourth embodiment, both the discharge electrode members 317 are detachably provided by the support member 316, so that both the discharge electrode members 317 are removed and attached to the discharge needle 319. Dust can be easily cleaned. At this time, since both discharge electrode members 317 are provided exposed at the tip of the air rectifying member 305, the attaching / detaching work from the support member 316 can be performed very easily during cleaning. Further, since both the discharge electrode portions 309 constitute a ground circuit, even if the discharge electrode member 317 is detachably supported by the support member 316, there is no leakage of high voltage. Further, since the static elimination electrode 307 is located at the tip of the air rectifying member 305 and the electric field forming electrode portion 308 and the casing 304 are separated from each other, even if the casing 304 is a metal grounding body, for example, The electric field from the forming electrode portion 308 is difficult to be formed toward the housing 304, and the electric field can be concentrated on the discharge needles 319 of both the discharge electrode portions 309 to efficiently generate air ions.

  In each of the embodiments described above, for example, as shown in FIG. 4, the discharge electrode member 117 in which a plurality of discharge needles 119 are provided on the rod-shaped base portion 118 is shown. As shown in FIG. 9, a discharge electrode member 26 in which a long base 24 and a plurality of discharge protrusions 25 are integrated by punching a metal plate or the like may be used. In the discharge electrode member 26, each discharge projection 25 protrudes from one side edge of the base portion 24 with a predetermined interval and is formed in a serrated shape with a sharp tip. Thereby, the discharge electrode member 26 can be formed easily and can be manufactured at low cost. Further, since the base 24 is formed in a flat plate shape from the sawtooth discharge protrusion 25, the discharge electrode members 17 and 117 are air rectified, particularly as shown in the first embodiment and the second embodiment. In the case where the air flow is provided inside the members 5 and 105, the discharge electrode member 26 shown in FIG. 9 is adopted instead of the discharge electrode members 17 and 117 shown in FIGS. Is preferred. Thereby, not only the resistance to the air flow from the air outlets 2 and 102 is small, but also a rectifying action of this air flow can be obtained, and air ions are more smoothly transferred by the air flow.

  Further, in each of the above embodiments, as shown in FIG. 2, for example, the electric field forming electrode portion 8 formed by covering the metal pipe 10 with the insulating pipe 11 in an unexposed state is shown. As shown in FIG. 10, an electric field forming electrode portion 29 in which an insulating pipe 28 is attached to the high-voltage power transmission cable 27 may be adopted. In the high-voltage power transmission cable 27, the metal core wire 30 is covered with the insulating tube 31. Therefore, by covering the metal core wire 30 with the insulating pipe 28 in an unexposed state, an extremely high insulating effect can be obtained. Further, even if a pinhole exists in the insulation pipe 28 or the insulation pipe 28 is damaged, the insulation coating state of the metal core wire 30 is reliably maintained by the insulation tube 31 of the high-voltage power transmission cable 27, High voltage leakage can be reliably prevented.

  Moreover, in each said embodiment, as shown in FIG. 11 using the ventilation type | formula ion production | generation apparatus 101 in 2nd Embodiment as an example, the air flow which blows off from the air blower outlet 102 on the outer side of the air rectification member 105 It is preferable to provide a mantle member 32 that opens the passage range of the electrode and surrounds the static elimination electrode 107. By providing the jacket member 32, the static elimination electrode 107 is covered, so that air ions generated at the static elimination electrode 107 can be more reliably put on the air flow. Further, for example, even when a grounding body such as a human body approaches the static elimination electrode 107, it becomes difficult to form an electric field from the electric field forming electrode portion 108 toward the approaching grounding body, and the electric field from the electric field forming electrode portion 108 is reliably discharged. It can be concentrated on the electrode portion 109. 11 shows an example in which the mantle member 32 is provided in the configuration of the second embodiment, but the shape of the mantle member 32 can be appropriately set according to the shape of the static elimination electrode or the air rectifying member. Therefore, it can be similarly adopted in each of the above embodiments.

  As described above, the blast type ion generator of the present invention can employ various configurations as described in the embodiments, but the inventor further uses the blast type ion generator of the present invention and the related art. The test which compares the static elimination effect with this blast type ion production | generation apparatus was done, and it confirmed that the static elimination characteristic of the blast type ion production | generation apparatus 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-type ion generation apparatus. As shown in FIG. 12, the test apparatus employs a charged plate monitor 51 that measures the charge decay time and ion balance of the metal plate 50. Has been. The charging plate monitor 51 supports the metal plate 50 of 150 mm square on the side surface of the main body 52 via a support portion 53 made of an insulator. The metal plate 50 simulates a charged body to be neutralized. The main body 52 incorporates a surface potential measuring device 54, a high voltage power supply 55, and a timer 56, and the metal plate 50 is given a charge from the high voltage power supply 55. The voltage of the metal plate 50 is measured by the surface potential measuring device 54, and the decay time of the voltage is measured by the timer 56.

  Then, a blowing type ion generating apparatus 101 is disposed on one side of the charging plate monitor 51 with a predetermined distance L. Air ions generated in the blower ion generator 101 are transferred to the metal plate 50 of the charging plate monitor 51 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 50, 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 50 is charged to ± 1000 V by the high voltage power supply 55, neutralized by applying air ions sent from the blower ion generator 101 to this, and the decay time required to decrease to ± 100 V is obtained. taking measurement.

  In this test, the horizontally long blown ion generator 101 shown in the second embodiment is used, the discharge electrode member shown in FIG. 9 is used, and the electric field forming electrode portion shown in FIG. 10 is used. did. The lengths of the discharge electrode member and the electric field forming electrode portion were 400 mm.

  In addition, although not shown in the figure, a blower is incorporated as a conventional blower ion generator, but the discharge electrode is a single discharge electrode portion (for example, the discharge electrode member 117 shown in FIG. 4). An AC high voltage was applied to the non-detachable structure and a pair of ground electrodes on both sides of the discharge electrode portion was used. The AC high voltage power supply 114 built in the blow type ion generator 101 is a winding transformer, the output voltage is 7 kV, the distance L is 300 mm, and the velocity of the air flow at the position of the metal plate 50 is about 1. 5 m / s.

  Table 1 shows a comparison result between the blower ion generator 101 of the present invention and the conventional blower ion generator.

  In Table 1, the voltage decay time (seconds) in the metal plate 50 due to static elimination and the ion in the case of using the blower ion generator 101 of the present invention and the case of using the conventional blower ion generator. The offset voltage (V) indicating the balance was compared. As shown in Table 1, it is clear that the blower ion generator 101 of the present invention can obtain the same static elimination characteristics as the conventional blower ion generator. In the description of this test, the blower ion generator 101 shown in the second embodiment is used, but the same results are obtained in the blower ion generators 1, 201, and 301 shown in the other embodiments. was gotten.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory perspective view which shows the external appearance of the ventilation type | formula ion generator of 1st Embodiment. II-II sectional view taken on the line of FIG. Explanatory perspective view which shows the external appearance of the ventilation type | formula ion generator of 2nd Embodiment. IV-IV sectional view taken on the line of FIG. Explanatory perspective view which shows the external appearance of the ventilation type | formula ion generator of 3rd Embodiment. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. Explanatory perspective view which shows the external appearance of the ventilation type | formula ion generator of 4th Embodiment. VIII-VIII sectional view taken on the line of FIG. The side view which shows another discharge electrode member. Sectional drawing which shows another electric field formation electrode part. An explanatory perspective view showing an example of an attachment state of a mantle member. The schematic block diagram of the test apparatus which evaluates the characteristic of a ventilation type | formula ion generator.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,101,201,301 ... Air blow type | mold ion generator, 2,102,202,302 ... Air blower outlet, 3,103,203,303 ... Air intake port, 4,104,204,304 ... Housing | casing, 5 , 105, 205, 305 ... air rectifying member, 6, 106, 206, 306 ... blower, 7, 107, 207, 307 ... static elimination electrode, 8, 108, 208, 308, 29 ... electric field forming electrode part, 9, 109 , 209, 309 ... discharge electrode section, 10, 110, 210, 310 ... metal pipe, 11, 111, 211, 311, 28 ... insulating pipe, 13, 113, 213, 313, 27 ... high-voltage power transmission cable, 114 , 214, 314 ... AC high voltage power supply, 16, 116, 216, 316 ... support member, 17, 117, 217, 317, 26 ... discharge electrode member, 18, 118, 2 8,318,24 ... base 19,119,219,319 ... discharge needle, 25 ... discharge projection 32 ... mantle member.

Claims (8)

A case, a blower that forcibly blows air taken from an air inlet formed in the case from an air outlet formed in the case, and an AC high-voltage power source built in the case In a blower type ion generating apparatus that includes a static elimination electrode that generates air ions by a high voltage supplied, and performs static elimination of a charged body by transferring the air ions generated by the static elimination electrode by an air flow blown from an air outlet,
An air rectifying member formed by an insulator extending outward from the casing along the air blowing direction from the side edge of the air outlet;
The static elimination electrode includes an electric field forming electrode portion to which a high voltage is applied, and a grounded discharge electrode portion facing the electric field forming electrode portion with a gap, and is provided at a distal end portion of the air rectifying member. ,
The electric field forming electrode portion includes a metal pipe connected to the AC high voltage power supply via a high voltage power transmission cable, and an insulating pipe that covers the metal pipe in an unexposed state,
The discharge electrode portion includes a discharge electrode member in which a plurality of discharge needles are disposed at predetermined intervals on a metal rod-shaped base, and a support member that detachably supports the discharge electrode member. A blower type ion generator. The air rectifying member is formed in a cylindrical shape, and its rear end is connected to a side edge of the air outlet,
The electric field forming electrode portion is formed in an annular shape and provided at a tip portion of the air rectifying member,
2. The blower type according to claim 1, wherein the discharge electrode member of the discharge electrode part is formed concentrically with the electric field forming electrode part and is detachably provided inside the electric field forming electrode part. Ion generator. The air rectifying member is formed in a pair of flat plates facing each other through the air outlet, and the respective rear end portions are connected to the side edges of the air outlet,
A pair of the electric field forming electrode portions are provided, each of which is provided at the tip of each air rectifying member,
The blast type ion generator according to claim 1, wherein the discharge electrode member of the discharge electrode part is detachably provided between both electric field forming electrode parts. The air rectifying member is formed in a cylindrical shape, and its rear end is connected to a side edge of the air outlet,
The discharge electrode member of the discharge electrode portion is formed in an annular shape and is detachably held at the tip of the air rectifying member,
2. The blower type ion generator according to claim 1, wherein the electric field forming electrode portion is formed in an annular shape concentric with the discharge electrode member and is provided inside the discharge electrode member. The air rectifying member is formed in a pair of flat plates facing each other through the air outlet, and the respective rear end portions are connected to the side edges of the air outlet,
A pair of discharge electrode members of the discharge electrode portion are provided, each of which is detachably held at the tip of each air rectifying member,
The blast type ion generator according to claim 1, wherein the electric field forming electrode part is provided between both discharge electrode members.   The discharge electrode portion is replaced with a discharge electrode member in which a plurality of discharge needles are disposed at a predetermined interval on a metal rod-shaped base portion, and has a serrated tip sharp on one side edge of a long flat plate-like base portion. 6. A blower type ion generator as claimed in claim 1, further comprising a discharge electrode member having a plurality of discharge protrusions, wherein the discharge electrode member is detachably supported by the support member. .   The electric field forming electrode part is provided with a high voltage power transmission cable in which a metal core wire is covered with insulation instead of the metal pipe, and the high voltage power transmission cable is covered with the insulation pipe in an unexposed state. The ventilation type ion generator of any one of 1 thru | or 6.   The outer cover member which opens the passage range of the airflow which blows off from an air blower outlet at least, and surrounds the said static elimination electrode is provided in the outer side of the said air rectification | straightening member. The blower type ion generator of description.

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