JP2008289801A - Gas purification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To send a gas of a treatment subject to a purification means by using a phenomenon in which gas flow is generated in a fixed direction when high-frequency voltage is applied between electrodes arranged with a dielectric in the middle in order to promote ozone generation by discharge of high-frequency voltage, and simultaneously decompose impurities in an efficient manner during ozonolysis with an ozonolysis catalyst. <P>SOLUTION: The gas purification device includes a first discharge electrode, a second discharge electrode mounted opposite to the first electrode via a dielectric, and an electric resource for discharge which applies high-frequency voltage to the first and second discharge electrodes. When high-frequency voltage is applied to the first and second electrodes, the first electrode, the dielectric, and the second electrode are arranged in order to flow a gas in a fixed direction with dielectric barrier discharge generated between these electrodes, and then a discharge gas flow induction part is formed. A purification part is set at the latter part of the gas flow direction in the discharge gas flow induction part. The purification part is equipped with a purification means for purifying impurities in the gas supplied to the purification part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, a dielectric barrier discharge generated between electrodes to which a high-frequency voltage is applied causes a gas to be purified to flow in a certain direction and lead it to a purification treatment unit. The present invention relates to a gas purification device that decomposes and adsorbs.

  A high-performance, energy-saving type for the purpose of removing harmful substances, preventing malodors, sterilizing, etc. (hereinafter collectively referred to as impurities or impurity purification) in food storage such as living spaces, warehouses and refrigerators, and other storages Gas purification devices such as deodorizing devices and air purifiers are demanded.

  Such a gas purification device repeatedly takes in and purifies air and other gases (hereinafter collectively referred to as gases to be purified such as air and exhaust gas) and returns them to the original space. It purifies the space. For this reason, it has been common to have a blower for circulating gas.

  An example of such a conventional gas purification apparatus will be described with reference to FIG. In the figure, 200 is a deodorizing device, 201 is a fan blower for taking in gas to be purified, 202 is a purification processing unit that adsorbs and / or decomposes impurities in the gas, 203 is a drive power supply for the fan blower, and 211 is a purification target. Reference numeral 212 denotes a gas outlet for the purified gas.

  The purification processing unit 202 includes an adsorbent for impurities such as activated carbon, or includes a micro-corona discharge generation unit for decomposing impurities such as odor components and an ozone catalyst for processing the generated ozone. In addition, when discharge is used for gas processing, the power supply 204 is attached. Moreover, these adsorbents and the discharge generating part may be used in combination.

  Such a purification apparatus must be equipped with a fan because it is necessary to take gas in the storage or the room into the apparatus. However, the fan equipment has problems such as generation of vibration, noise, and the necessity of electric power for driving the apparatus, and it has been an obstacle to downsizing the purification apparatus.

In order to solve the problem of the purification apparatus provided with such a fan, a proposal to use an air flow generated by discharge generated between electrodes as a blowing means for the gas to be purified has also been known. That is, when a high DC voltage is applied between the electrodes, dielectric breakdown occurs in the space around the electrode, corona discharge occurs, a large amount of electrons are emitted from the tip of the electrode, and adhere to dust and gas molecules in the space. , Ionize. Since ionized dust and gas molecules flow toward the attracting electrode and are collected by the attracting electrode, such a flow of gas molecules is used as a blowing means of the air cleaner. (See Patent Document 1 and Patent Document 2)
JP 2004-138268 A JP 2002-95998 A

  Certainly, in the prior art described in the above-mentioned patent document using the ionic wind, there is an advantage that a fan for blowing air is unnecessary, but the discharge generated between the electrodes to which a DC voltage is applied is used as a means for generating an air flow. Therefore, there was a possibility that water droplets or dust would adhere between the electrodes and transition to arc discharge. In particular, in environments where dust is present in gases such as homes and factories, there is a possibility of transition to arc discharge due to dust, dirt or water droplets adhering to the electrode, which may damage the electrode. There was a drawback that the product price was expensive by taking.

  In addition, in a purifying device using discharge, it is desirable that the action of decomposing impurities by ozone generated between electrodes to which a high voltage is applied is effective, but a device that applies a DC voltage between conventional electrodes. However, the ozone generation is not sufficient, and there is a drawback that the impurity cannot be decomposed effectively.

  The present invention has been proposed in order to solve the problems of the prior art as described above, and its purpose is to use a fanless type by utilizing an air flow generated when a high frequency voltage is applied between the electrodes. It is to obtain a small and simplified gas purification apparatus.

  Another object of the present invention is that a larger amount of ozone gas is generated between electrodes to which a high-frequency voltage is applied than when a DC voltage is applied, and an ozone decomposition catalyst for decomposing this ozone-generating gas, It is an object of the present invention to provide a gas purification apparatus having excellent purification performance by paying attention to effectively decomposing impurities in the gas when decomposing ozone.

  In order to achieve the above object, a gas purification apparatus of the present invention includes a first discharge electrode, a second discharge electrode provided opposite to the first discharge electrode, and the first and second discharge electrodes. A discharge power source for applying a high-frequency voltage to the discharge electrodes of the first electrode, applying the high-frequency voltage to the first electrode, the dielectric and the second electrode, and applying the high-frequency voltage to the first electrode and the second electrode In this case, a discharge airflow inducing section is arranged so that the airflow flows in a certain direction due to a dielectric barrier discharge generated between these electrodes, and a purification installed downstream of the direction of airflow in the discharge airflow inducing section. The present invention is characterized by comprising a processing section and a purification processing means for purifying impurities in the gas supplied to the purification processing section.

  Further, the discharge air flow inducing section generates ozone by dielectric barrier discharge generated between the first and second electrodes, and the purification treatment means includes an ozone decomposition catalyst. It is also an aspect of the present invention that the impurities in the gas are decomposed simultaneously with the ozone decomposing action in the decomposition catalyst.

  According to the present invention, a gas to be processed can be used without using a fan by utilizing a phenomenon that an air flow is generated in a certain direction when a high frequency voltage is applied between electrodes arranged with a dielectric interposed therebetween. Can be sent to the purification processing means. In addition, by using discharge by high-frequency voltage, the generation of ozone is promoted, and at the same time, the decomposition of impurities can be effectively performed by the ozone decomposition action by the ozone decomposition catalyst.

(1) 1st Embodiment (1-1) Structure of 1st Embodiment FIG. 1: is a block diagram of the gas purification apparatus of 1st Embodiment of this invention. In FIG. 1, reference numeral 100 denotes a gas purification device main body. The gas purification device 100 has a chamber shape in which the inside is a gas circulation space, and a gas to be purified at the inlet side. The suction port 101 is provided with a purified gas discharge port 102 on the outlet side. In the gas purification apparatus 100, a discharge air flow induction unit 104 connected to a discharge power source 103 and a purification processing unit 105 provided in a subsequent stage are incorporated.

  The discharge power source 103 may be a commercial frequency discharge power source, but is not limited thereto, and the output voltage may be pulsed (both positive, nonpolar, positive and negative) (Alternating voltage)) and alternating current (sine wave, intermittent sine wave) waveforms can be used. Also, feedback control can be performed by a control device that separately provides the frequency of the high-frequency power source.

  In FIG. 1, the box-shaped discharge generating unit 104 and the purification processing unit 105 are arranged in a gas purification apparatus 100 having a chamber-shaped casing so as to be connected by a duct 106, but as shown in FIG. It is also possible to adopt a configuration in which the box-shaped purification processing unit 105 is integrated directly with the discharge-like discharge generation unit 104.

  As the discharge air flow inducing section 104, for example, as shown in FIG. 1 and FIG. 2, a plurality of plasma actuators 120 arranged at a constant interval in parallel with the blowing direction of the gas to be processed are used. Is done.

  FIG. 3 shows an example of the plasma actuator 120. That is, it is composed of a plurality of strip-shaped metal foils that extend perpendicularly to the airflow direction on one surface (upper surface in the figure) of the insulating plate 121 made of a dielectric disposed in parallel with the gas blowing direction. A first electrode 122 is provided, and the other surface (lower surface in the figure) of the insulating plate 121 is a second electrode made of a metal foil having a large area and a wide width so as to cover the entire first electrode 122. 123 is provided.

  The first and second electrodes 122 and 123 are connected to the discharge power supply 103 so that a discharge is generated between the electrodes when a high frequency voltage is applied. In this case, the edge on the upstream side of the airflow in the elongated strip-shaped first electrode 121 is covered with the insulating material 124, and only one side of the first electrode 122 is discharged.

  The insulating plate 121 and the insulating material 124 include insulating resins such as polyimide, glass epoxy, rubber, Teflon (registered trademark), and Kapton (registered trademark), and inorganic insulating materials such as alumina, glass, and mica. used.

  On the other hand, the purification treatment unit 105 includes, for example, an adsorbent of impurities such as activated carbon, an amphoteric surfactant-based deodorant, a green tea extract, and a porous silicone resin, a photocatalyst such as granular titanium oxide, and an ozone generator. Impurity decomposers can be used. In particular, in this embodiment, an ozone decomposition catalyst for preventing ozone generated by the discharge between the first and second electrodes from leaking outside the purification apparatus is used as an impurity purification treatment means.

(1-2) Operation of the First Embodiment Next, the operation of the first embodiment having such a configuration will be described.
First, an operation in which a gas to be processed is blown toward the purification processing unit 105 by the plasma actuator 120 provided in the discharge airflow induction unit 104 will be described.

  When a high voltage is applied from the discharge power source 103 between the first and second electrodes 122 and 123 and this becomes a potential difference equal to or greater than a certain threshold value, a discharge occurs between the two electrodes, and a discharge plasma is generated along with the discharge. Is done. Here, since the insulating plate 121 which is a dielectric is interposed between the electrodes 122 and 123, the arc discharge does not occur even at a high temperature or in the presence of impurities, and can be stably maintained. A dielectric barrier discharge 125 is generated.

  Further, the dielectric barrier discharge 125 becomes a creeping discharge formed along the surface of the insulating plate 121, and the dielectric barrier discharge 125 causes a predetermined direction (direction from the first electrode 122 to the second electrode 123). ) Can generate airflow. In this case, making the positional relationship between the first and second electrodes 122 and 123 and the insulating plate 121 asymmetrical is a condition for generating an air flow from one electrode to the other electrode.

  That is, when the first and second electrodes 122 and 123 are arranged in an asymmetrical shape, when an alternating voltage is applied between the electrodes, a negative voltage is generated when a positive voltage is applied to the first electrode 122. When applied, airflows having opposite directions and different speeds are induced, and when airflows in both directions are time-averaged, airflows in a fixed direction are obtained. In particular, as shown in FIG. 3, when the electrode area of the first electrode 122 is made smaller than the electrode area of the second electrode, the second electrode having a larger electrode area than the first electrode 122 having a smaller electrode area. An air flow is generated toward the electrode 123.

  In this way, the gas to be processed introduced from the suction port 101 is sent toward the purification processing unit 105 by the air flow generated by each plasma actuator 120. The purification target gas that has reached the purification processing unit 105 is decomposed and adsorbed by impurities in the purification processing unit 105, and the purified gas is discharged from the discharge port 102 to the outside of the apparatus.

  In this case, in the present embodiment, ozone is generated along with the plasma discharge generated between both electrodes in the discharge airflow induction unit 104. In particular, since the voltage applied between the two electrodes is a high-frequency voltage, ozone is generated more effectively than in the prior art in which a DC voltage is applied between the electrodes. Since the generated ozone functions to decompose impurities in the gas during its natural decomposition, a decomposition action superior to that of the prior art can be expected only by applying a high-frequency voltage.

  Moreover, in the present embodiment, by disposing the ozone decomposition catalyst in the purification treatment unit 105, the ozone generated between the two electrodes is actively decomposed on the catalyst surface. Decompose. Thereby, the problem of ozone being discharged outside the purification apparatus can be solved, and at the same time, the decomposition of ozone can be promoted and the decomposition action of impurities accompanying the ozone decomposition can be improved.

  That is, on the surface of the ozone decomposition catalyst, ozone is decomposed and O radical oxygen is purified in the process. This radical species promotes the oxidative decomposition of harmful substances and odorous components adsorbed on the catalyst surface, thereby improving the processing capacity of the apparatus.

(1-3) Effects of First Embodiment As described above, according to the present embodiment, it becomes possible to send the gas to be purified to the processing unit without using a fan, and vibration and noise are reduced. It has the characteristics. In addition, impurities such as malodorous components and harmful components are decomposed by discharge, and the effect of decomposing impurities during ozone decomposition by the ozone decomposition catalyst is also exhibited, so that the processing capacity of the gas purification device is improved.

(1-4) Modification of the first embodiment (1)
FIG. 4 shows another example of the plasma actuator. A second electrode 123, which is a large metal foil, is formed in an insulating plate 121, which is a dielectric, and a plurality of strip-shaped first electrodes 122 are arranged on both surfaces of the insulating plate 121, respectively. Note that the structure in which the insulator 124 prevents discharge on one side of the first electrode 122 is the same as that in FIG.

  In this modification, discharge is generated between the second electrode 123 at the center of the insulating plate 121 and the first electrodes 122 arranged on both sides of the insulating plate 121. In this case, since the asymmetric arrangement of the first and second electrodes and the insulating plate 121 is ensured, an airflow in a certain direction can be generated between the electrodes to which the alternating voltage is applied.

(1-5) Modification of the first embodiment (2)
FIG. 5 shows still another example of the plasma actuator. In this example, the second electrode 123 is configured by a strip-shaped metal foil similar to the first electrode 122. In this case, the positions of the first and second electrodes 122 and 123 are shifted in the airflow direction (the edge of the second electrode protrudes to the downstream side of the airflow), so that the downstream side of the first electrode 122 Discharge occurs between the edge and the downstream edge of the second electrode.

  Also in this modified example, an airflow flowing from the first electrode 122 toward the second electrode 123 can be generated by the asymmetrical arrangement of the first and second electrodes 122 and 123 with respect to the insulating plate 121.

  In this embodiment, the first and second electrodes are shifted in position so that a discharge is generated between the downstream edges of both electrodes. It is also possible to prevent discharge at the upstream edge of both electrodes by covering the upstream edge of the airflow of the electrode with the insulating material 124.

(2) Second Embodiment (2-1) Configuration of Second Embodiment FIG. 6 is a perspective view of a gas purification device according to a second embodiment of the present invention, and illustrates the inside of the discharge airflow induction section 104. It is. In FIG. 6, reference numeral 100 denotes a gas purification device, 104 denotes a discharge airflow induction unit, 120 denotes a plasma actuator composed of two rod-like electrodes that generate an airflow, and 105 denotes a purification processing unit. As the purification processing unit 105, various adsorbents and decomposition means described in the first embodiment can be used.

  The plasma actuator 120 has a structure as shown in FIG. 7, for example. That is, at least one of the first and second discharge electrodes 122 and 123 (in the figure, the second electrode 123) is covered with an insulating material 121 that is a dielectric. As a result, two rod-shaped electrodes 122 and 123 having different outer diameters are placed in parallel in close proximity or in contact with each other, and a high frequency voltage is applied between both electrodes to generate a dielectric barrier discharge 125 between the two electrodes. It is configured to let you.

  That is, in FIG. 7, the first electrode 122 is composed of a metal cylindrical electrode, and the second electrode 123 is composed of a metal counter electrode covered with an insulating material 121. Further, the second electrode 123 is grounded, and a high frequency voltage is applied to the first electrode 122 from the discharge power supply 103 to generate a discharge 125.

  The first and second electrodes do not have to be cylindrical as shown in FIG. 7, and may be flat as shown in FIG. Further, the insulating material 121 covering the second electrode may not be a columnar shape similar to the electrode, but may be a spindle shape as shown in FIG. 8 or other shapes.

(2-2) Operation of the Second Embodiment From the discharge airflow induction unit 104 including the first and second electrodes 122 and 123 shown in FIGS. 6 to 8, a flow toward the right direction in the figure is induced, These serve as the driving force for drawing the gas to be processed into the purification processing unit 105. Further, impurities such as malodorous components and harmful components are decomposed and removed by the discharge generated between the electrodes. Therefore, the processing capacity of the gas purification device is improved.

(2-3) Effects of the Second Embodiment As is clear from the above results, this embodiment can provide a gas purification device that has lower vibration and noise than the conventional one and has a high processing capacity. In particular, by making the first and second electrodes 122 and 123 into rod-like electrodes, the arrangement of the electrodes and the increase / decrease in the number of electrodes can be flexibly compared to the first embodiment using plate-like electrodes. There is an advantage that can be accommodated.

(3) Third Embodiment (3-1) Configuration of Third Embodiment FIG. 9 is a perspective view of a gas purification device according to a third embodiment of the present invention, and illustrates the inside of the discharge airflow induction unit 104. is there. In FIG. 9, reference numeral 100 denotes a cylindrical gas purification device, 104 denotes a discharge airflow inducing portion which is also provided in the preceding stage, 120 denotes a plasma actuator for generating an airflow, and 105 denotes a cylinder. The purification process part is shown.

  In the third embodiment, the plasma actuator 120 is formed by bending a flat insulating plate 121 having the first and second electrodes 122 and 123 arranged on both sides described in FIGS. 3 to 5 into a cylindrical shape. It is composed. In the present embodiment, the first electrode 122 is disposed on the inner surface side of the cylindrical insulating plate 121 and the second electrode is disposed on the outer surface side, so that airflow is induced inside the cylinder. I have to.

  In this case, a plurality of cylindrical plasma actuators 120 can be arranged along the flow direction of the airflow. Also, as shown in FIG. 10, the cylindrical plasma actuators 120 having different diameters are coaxially arranged. You may arrange in. Furthermore, when the purification device 100 has a rectangular tube shape, the plasma actuator 120 can also have a rectangular tube shape.

(3-2) Actions of Third Embodiment Next, these actions will be described. As shown in FIG. 9, the inner wall of the cylindrical plasma actuator 120 is caused by a discharge induced from the first electrode 122 arranged on the inner surface of the cylindrical plasma actuator 120 toward the surface side of the insulating plate 121. The gas to be purified is sent from the inlet of the purification device 100 to the subsequent purification processing unit 105 by this air flow.

  Further, the air volume can be increased by arranging the plasma actuators 120 in multiple stages in the flow direction of the air flow, or by installing a plurality of them in a coaxial manner as shown in FIG. The gas to be purified sent by the plasma actuator 120 is decomposed and removed by the discharge of the first and second electrode portions, and the adsorbent of the purification processing means provided in the purification processing unit 105 After further purification by the disassembling means, it is discharged outside the apparatus.

(3-3) Effects of Third Embodiment As is clear from the above results, according to the present embodiment, the purification device is provided by disposing the plasma actuator 120 in the vicinity of the outer wall surface of the cylindrical purification device 100. It is possible to induce an air flow without hindering the flow of gas sucked into the inside. Moreover, it becomes possible to make an airflow more powerful by arrange | positioning in multiple steps in an airflow direction, or arrange | positioning multiple concentric circles.

  Further, the plasma actuator 120 having a cylindrical shape or a rectangular tube shape has an advantage that a purification device can be manufactured in accordance with the shape of an existing duct or exhaust pipe.

(4) Fourth Embodiment (4-1) Configuration of Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, the photocatalyst 130 supported on a flat plate is disposed between the flat plate-type plasma actuators 120 arranged in parallel as described in FIG. In addition, the photocatalyst carrier may be a mesh, a honeycomb, or a ceramic porous body. Note that the plasma actuator 120 is not limited to the shape shown in FIG. 11, and any of those shown in any of the embodiments described so far can be appropriately selected and used.

  In the fourth embodiment, an adsorbent and an ozone decomposition catalyst may be disposed after the plasma actuator 120 and the photocatalyst 130, as in the other embodiments.

(4-2) Operation of Fourth Embodiment Next, these operations will be described. In this embodiment, the plasma actuator 120 generates active species such as ozone in addition to inducing an air flow, and decomposes harmful substances and malodorous substances. Furthermore, light from the ultraviolet region to the visible region is emitted by discharge. This light activates the photocatalyst installed side by side with the plasma actuator, contributing to the decomposition of harmful substances and odorous substances.

(4-3) Effect of Fourth Embodiment According to the fourth embodiment having such a configuration, the decomposition action of impurities by the discharge of plasma actuator 120 and ozone generated thereby, and the decomposition action by photocatalyst 130 Therefore, the purification function can be further enhanced as compared with the case of the plasma actuator 120 alone.

  Further, since the light generated by the discharge of the discharge airflow induction unit 104 can be used for activating the photocatalyst, there is no need to provide an activation lamp in the arrangement portion of the photocatalyst, or to irradiate ultraviolet rays from the outside of the apparatus, There is also an advantage that the structure of the apparatus is simplified. This embodiment does not exclude the provision of these lamps and irradiation windows.

  Further, in the case where impurities are decomposed only by the photocatalyst 130 and no additional purification processing means such as an adsorbent or decomposition means is provided in the subsequent stage, the discharge air flow inducing section 104 and the purification processing section are connected to the interior of the purification apparatus 100. Therefore, it is possible to reduce the length of the entire apparatus (length in the airflow direction). Moreover, since the impurity decomposition process by the discharge and the purification process by the oxidation catalyst or the like are performed at the same position, it is possible to provide a gas purification apparatus having a high processing capacity due to the synergistic effect of both.

(5) Other Embodiments The present invention is not limited to the above-described embodiments, and includes the following other embodiments.

(a) A material filled with an adsorbent as a purification processing means of the purification processing unit 105. The form of the adsorbent may be a honeycomb structure or a ball shape as long as it does not hinder the gas flow. If necessary, a means for completely decomposing ozone generated by discharge may be provided by adding an ozone decomposition catalyst in the subsequent stage.

  In this embodiment, a harmful substance and a malodorous substance are carried on the airflow induced by the discharge airflow induction unit 104 and are adsorbed by the adsorbent placed in the purification processing unit 105 at the subsequent stage. Ozone and radical species generated by discharge are also adsorbed, where harmful substances and malodorous components are oxidatively decomposed. It is also decomposed directly by the discharge of the plasma actuator.

(b) The purification processor 105 is filled with a photocatalyst as a purification treatment means. The photocatalyst carrier may be any one of mesh, flat plate, honeycomb structure, and ceramic ball as long as it does not hinder the gas flow. A photocatalyst becomes active when it receives ultraviolet light or visible light, and therefore, it is necessary to devise light. For example, it is preferable to provide the purification processing unit 105 with a window through which ultraviolet light and visible light are transmitted, or to use a lamp together. If necessary, a means for completely decomposing ozone generated by discharge may be provided by adding an ozone decomposition catalyst in the subsequent stage.

  In this embodiment, harmful substances and malodorous substances are carried on the airflow induced by the discharge airflow induction unit 104 and decomposed and removed by the photocatalyst placed in the purification processing unit 105 at the subsequent stage. It is also directly decomposed by the discharge of the plasma actuator.

(c) A device using an oxidation catalyst as a purification treatment means of the purification treatment unit 105. The oxidation catalyst may have a honeycomb structure or a ball shape as long as it does not hinder the gas flow. If necessary, a means for completely decomposing ozone generated by discharge may be provided by adding an ozone decomposition catalyst in the subsequent stage.

  In this embodiment, harmful substances and malodorous substances are carried on the airflow induced by the discharge airflow induction unit 104 and are oxidatively decomposed by the oxidation catalyst placed in the purification processing unit 105 at the subsequent stage. It is also decomposed directly by the discharge of the plasma actuator.

(d) As in the case of the photocatalyst of the fourth embodiment, a purification processing means such as an adsorbent or an ozone decomposition catalyst is arranged in the vicinity (around) the discharge airflow induction section.
(e) Provided with a blower such as a fan for assisting the blowing of gas by the airflow inducing unit 104.

(f) Equipment that heats the entire device or the discharge airflow generator. In this case, the following two points can be considered as the effect of heating.
-The catalyst and the ozone decomposition catalyst are activated, the impurity processing capacity is increased, and the components remaining in the purification means (reactor) as an intermediate during decomposition are reduced.
・ It has the effect of refreshing the purification means. That is, the components remaining in the purification apparatus as intermediates in the course of decomposition are completely oxidized (CO or CO ₂ ) and discharged to the outside. In this case, it is desirable to leave it for a while while discharging at a high temperature.

(g) By controlling the discharge power by feeding back the frequency of the high frequency, the air volume and ozone generation amount are adjusted. Power control can be handled by changing the applied voltage or the repetition frequency. However, the control by applied voltage does not start discharging unless a voltage higher than a certain level is applied, or the increase in power with respect to voltage rise is very high. It is big and difficult to use. On the other hand, since the repetition frequency changes substantially linearly, a function of feeding back the repetition frequency can be incorporated as a means for best fitting the capacity of the purification device according to the load.

The side view which shows the whole structure of 1st Embodiment of this invention. The side view which shows the other example of 1st Embodiment of this invention. The perspective view which shows an example of the plasma actuator 120 in 1st Embodiment of this invention. The perspective view which shows the modification of the plasma actuator 120 in 1st Embodiment of this invention. The perspective view which shows the other modification of the plasma actuator 120 in 1st Embodiment of this invention. The perspective view which shows the whole structure of 2nd Embodiment of this invention. Sectional drawing which shows the plasma actuator 120 part in 2nd Embodiment of this invention. Sectional drawing which shows the modification of the plasma actuator 120 part in 2nd Embodiment of this invention. The perspective view which shows the whole structure of 3rd Embodiment of this invention. The perspective view which shows the modification of 3rd Embodiment of this invention. The perspective view which shows the structure of 4th Embodiment of this invention. The side view which shows an example of the conventional gas purification apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Gas purification apparatus 101 ... Inlet port 102 ... Release port 103 ... Discharge power supply 104 ... Discharge airflow induction part 105 ... Purification process part 106 ... Duct 120 ... Flat plate type plasma actuator 121 ... Insulating plate 122 ... 1st electrode 123 ... second electrode 124 ... insulating material 125 ... discharge 130 ... photocatalyst

Claims (12)

A first discharge electrode; a second discharge electrode provided opposite to the first discharge electrode through a dielectric; and a discharge power source for applying a high-frequency voltage to the first and second discharge electrodes. ,
When the high frequency voltage is applied to the first electrode, the dielectric, and the second electrode, the air current is generated in a certain direction due to the dielectric barrier discharge generated between the electrodes. A discharge airflow inducing portion arranged to flow;
A gas purification apparatus comprising: a purification processing unit to which an airflow induced in the discharge airflow induction unit is supplied; and purification processing means for purifying impurities in the gas supplied to the purification processing unit.   The said purification treatment means is provided with an ozone decomposition catalyst, and decomposes impurities in the gas supplied to the purification treatment section when ozone is decomposed by this ozone decomposition catalyst. The gas purification apparatus as described.   The gas purification apparatus according to claim 1 or 2, wherein the purification treatment means is an oxidation catalyst, and the oxidation catalyst decomposes impurities in the gas supplied to the purification treatment unit.   The gas purification apparatus according to claim 1 or 2, wherein the purification treatment means is an adsorbent, and the adsorbent captures impurities in the gas supplied to the purification treatment section.   The gas purification apparatus according to claim 1 or 2, wherein the purification treatment means is a photocatalyst, and the photocatalyst decomposes impurities in the gas supplied to the purification treatment unit.   The purification treatment unit is provided with a window or a light source that transmits at least light from the ultraviolet region to the visible region, and the photocatalyst disposed in the purification treatment unit is exposed to light from the outside. The gas purification apparatus according to claim 5.   6. The gas purification according to claim 5, wherein the discharge airflow inducing section and the purification processing section are arranged in the same space, and the photocatalyst is arranged at a position where a discharge portion of the discharge airflow inducing section is irradiated. apparatus.   The said 1st electrode and 2nd electrode are comprised from a plate-shaped member, These 1st and 2nd electrodes are arrange | positioned so as to oppose both surfaces of a flat plate-shaped insulating board, It is characterized by the above-mentioned. The gas purification apparatus in any one of Claim 1-7.   At least one of the first and second electrodes is composed of a rod-shaped member covered with an insulating material, and the first and second rod-shaped electrodes are arranged in parallel in close proximity or in contact with each other. The gas purification device according to any one of claims 1 to 7.   The first electrode and the second electrode are formed of a cylindrical member, and the first and second electrodes are arranged so as to face both surfaces of a cylindrical insulating plate. The gas purification apparatus in any one of Claims 1-7.   The gas purification apparatus according to claim 10, wherein a plurality of the first and second cylindrical electrodes and insulating plates are arranged along a flow direction of the airflow.   The gas purification apparatus according to claim 10 or 11, wherein a plurality of the cylindrical first and second electrodes and insulating plates are concentrically arranged.

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