JP2006247582A - Air purifier and air conditioning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air purifier which can improve ability to degrade toxic chemical substances in air and an air conditioning apparatus provided with the air purifier. <P>SOLUTION: The air purifier 1 is provided with a container that comprises a cylindrical dielectric 11 having an air inlet on one end and an air outlet on the other end so as to form a flow passage starting from the inlet to the outlet, a closed space, a lid 12, and a lid 13. The air purifier 1 is also provided with an exothermic body 14 disposed within the region on the air inlet side within the internal space of the container and a discharging electrode 15 and a counter electrode 16 disposed within the region on the air outlet side in the internal space of the container. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air purification device that purifies air by generating discharge plasma, and an air conditioning device that includes the air purification device.

  In recent years, with the emergence of environmental problems and the increase in airtightness of living spaces, there is an increasing demand for a living environment that removes chemical substances in the air harmful to the human body and leads to a healthy and comfortable life. In order to meet these demands, discharge plasma is generated in the atmosphere, and harmful chemical substances in the air are decomposed by using the strong oxidizing action of active species such as radicals, ozone, and ions generated by the discharge plasma. Air conditioning devices such as air purifiers and air conditioners equipped with technology have been developed and sold.

For example, Japanese Patent Application Laid-Open No. 11-319631 (Patent Document 1) discloses an air cleaner equipped with a technique for deodorizing odor components in air by reacting them with plasma, radicals, and ozone generated at a discharge electrode. ing.
JP 11-319631 A

  However, in the conventional air conditioning apparatus described above, the strong oxidizing power of radicals cannot be fully utilized. For example, the degradation performance of harmful chemical substances such as formaldehyde that is difficult to be decomposed by reaction with ozone is low. was there.

  Therefore, an object of the present invention is to provide an air purifying device capable of improving the decomposition performance of harmful chemical substances in the air, and an air conditioning device including the same.

  An air purifying device according to the present invention has a gas inlet at one end, a gas outlet at the other end, and a closed internal space that forms a flow passage that leads from the inlet to the outlet. And a heating element disposed in the region on the inlet side in the internal space of the container, and an electrode disposed in a region on the outlet side in the internal space of the container.

  In the air purification apparatus according to the present invention, the heating element is arranged on the inlet side and the electrode is arranged on the outlet side, so that most of the air taken into the container from the inlet is heated by the heating element in advance. By being sent to the vicinity of the electrode in a state of being applied, the temperature of the air near the electrode surface can be made higher. Further, since the container has a closed internal space, it is possible to prevent the heat supplied by the heating element from escaping to the outside of the container, and to keep the temperature of the air in the container at a high temperature. For this reason, the temperature of the air near the electrode surface can be made higher. Therefore, discharge plasma can be generated in high-temperature air. Thereby, since the reaction activity of the radical produced | generated by discharge plasma improves significantly, the high decomposition effect can be acquired with respect to the harmful chemical substance in air.

  In the air purification apparatus according to the present invention, the container is preferably a cylindrical container. In this case, the air taken into the internal space closed from the inflow port needs to pass through the heating element and reach the vicinity of the electrode, but if the container is formed in a cylindrical shape, Since most of the air taken into the container can be easily sent to the vicinity of the electrode along the cylindrical space in a state of being heated in advance by the heating element, the temperature of the air in the vicinity of the electrode is kept high. Is easy.

  Moreover, it is preferable that the air purification apparatus according to the present invention further includes exhaust means disposed outside the outlet of the container. In this case, the temperature in the closed internal space can be controlled by adjusting the exhaust amount of the exhaust means together with the heat generation amount of the heating element.

  Furthermore, in the air purification apparatus according to the present invention, it is preferable that the temperature of the gas contacting the surface of the electrode is heated to 100 ° C. or more by the heating element. In this case, since moisture contained in the air is surely gas in the vicinity of the electrode, there is no condensation on the electrode surface, and the intensity of the discharge plasma is stabilized. The heating temperature is preferably 1000 ° C. or lower so that peripheral members, parts, etc. constituting the air purification device are not deformed, melted, broken or the like.

  In the air purifying device according to the present invention, at least a part of the container is formed of a dielectric, and the electrode includes a first electrode disposed on the inner surface of the dielectric in contact with the inner space of the container, and an outer space of the container. And a second electrode disposed on the outer surface of the dielectric in contact with the substrate. In this case, since the area of the electrode can be increased by effectively utilizing the limited space in the container, discharge plasma can be generated in a wide area, which is excellent for harmful chemical substances in the air. The decomposition effect can be obtained. In addition, since the first and second electrodes can be easily fixed, the air purification device can be manufactured at a low cost, and good quality can be obtained. Furthermore, since the dielectric serves as a dielectric for generating creeping discharge plasma in the vicinity of the first electrode and a role as a structural material constituting at least a part of the container, the material used can be saved. The air purifier can be manufactured at a low cost.

  In the air purification device of the present invention configured as described above, the first electrode has a plurality of openings and a peripheral edge surrounding the plurality of openings, and the second electrode is It is preferable to have a peripheral portion that is disposed so as to face the first electrode and surrounds the peripheral portion of the first electrode. In this case, since the first electrode is used as a discharge electrode and the second electrode is used as a counter electrode, the area of the electrode can be increased by effectively utilizing the limited space in the container. It can be generated in a wider area, and a more excellent decomposition effect can be obtained for harmful chemical substances in the air.

  The air purification device according to the present invention preferably further includes a heat insulator arranged to cover the outside of the container. In this case, it is possible to prevent the temperature around the outside of the air purification device from rising.

  An air conditioner according to another aspect of the present invention includes an air purifier having at least one of the above-described features. The air conditioner using the above air purification device can be used for the purpose of obtaining an action of decomposing harmful chemical substances in the air by using discharge plasma, specifically, an air cleaner, an air conditioner. It can be incorporated into a machine, a dehumidifier, a heater, or the like.

  As described above, according to the present invention, the reaction activity of radicals generated by the discharge plasma is greatly improved, so that it is highly resistant to harmful chemical substances in the air by fully utilizing the strong oxidizing power of radicals. A decomposition effect can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic cross-sectional view showing a schematic structure of an air purification device according to Embodiment 1 of the present invention.

  As shown in FIG. 1, an air purification device 1 includes a cylindrical dielectric 11, a lid 12 having an opening at the center as a gas inlet (outside air inlet) at one end, and a gas at the other end. And a lid 13 provided with an opening in the center as an outlet (exhaust port). A cylindrical container is constituted by the dielectric 11 and the lids 12 and 13, and forms a flow passage that leads from the inlet to the outlet. The cylindrical container has a closed internal space.

  The heating element 14 is arranged in an area on the inlet side of the lid 12 in the internal space of the cylindrical container. As the first and second electrodes, the discharge electrode 15 and the counter electrode 16 are arranged in a region on the outlet side in the internal space of the cylindrical container. The discharge electrode 15 is disposed on the inner surface of the dielectric 11 in contact with the inner space of the cylindrical container, and the counter electrode 16 is disposed on the outer surface of the dielectric 11 in contact with the outer space of the cylindrical container. The discharge electrode 15 and the counter electrode 16 are disposed so as to face each other with the dielectric 11 interposed therebetween. The voltage applying means 17 is connected so as to apply a voltage between the discharge electrode 15 and the counter electrode 16. The exhaust means 18 is connected to the outlet of the lid 13 by a tube 19.

  The discharge electrode 15 has a plurality of openings and a peripheral edge surrounding the plurality of openings. The counter electrode 16 does not have an opening inside and is disposed so as to face the discharge electrode 15 and has a peripheral portion surrounding the peripheral portion of the discharge electrode 15. That is, the counter electrode 16 includes an opening and a peripheral edge of the discharge electrode 15 and has a planar area that is slightly larger than the discharge electrode 15.

  The voltage applying means 17 applies a high voltage that changes over time, such as an alternating high voltage, between the discharge electrode 15 and the counter electrode 16. Thereby, discharge plasma is generated in the vicinity of the edge of the opening of the discharge electrode 15 and in the vicinity of the periphery of the discharge electrode 15.

  The heating element 14 is provided between the outside air inlet of the lid 12 and the region where the discharge electrode 15 is disposed, and heats the air passing through the heating element 14.

  The exhaust unit 18 exhausts the air in the space surrounded by the dielectric 11, the lid 12, and the lid 13 through the tube 19 in the direction indicated by the arrow Q. Accordingly, outside air is taken into the space surrounded by the dielectric 11, the lid 12, and the lid 13 in the direction indicated by the arrow P via the outside air inlet of the lid 12.

  Since the outside air taken in via the outside air inlet of the lid 12 is heated by the heating element 14 in the semi-closed space surrounded by the dielectric 11, the lid 12 and the lid 13, It is easy to keep the temperature of the air high. Further, the temperature of the air in the semi-closed space can be controlled by adjusting the heat generation amount of the heating element 14 and the exhaust amount of the exhaust means 18. That is, as the heat generation amount of the heating element 14 increases and the exhaust amount of the exhaust means 18 decreases, the temperature of the air in the semi-closed space becomes higher.

  Further, since the air taken into the semi-closed space from the outside air inlet of the lid 12 passes through the heating element 14 before reaching the vicinity of the discharge electrode 15, the temperature of the air in the vicinity of the discharge electrode 15 is increased. It is easy to keep. Therefore, discharge plasma can be generated from the discharge electrode 15 in high-temperature air.

  In the air purification apparatus 1 of the present invention configured as described above, the heating element 14 is arranged on the inlet side, and the discharge electrode 15 and the counter electrode 16 are arranged as electrodes on the outlet side. Most of the air taken in is sent to the vicinity of the discharge electrode 15 while being heated by the heating element 14 in advance, so that the temperature of the air near the surface of the discharge electrode 15 can be made higher. In addition, since the container has a closed internal space, the heat supplied by the heating element 14 can be prevented from escaping to the outside of the container, and the temperature of the air in the container can be kept high. For this reason, the temperature of the air near the surface of the discharge electrode 15 can be increased. Therefore, discharge plasma can be generated in high-temperature air. Thereby, since the reaction activity of the radical produced | generated by discharge plasma improves significantly, the high decomposition effect can be acquired with respect to the harmful chemical substance in air.

  Further, in the air purification device 1, it is necessary for the air taken into the internal space closed from the inlet to pass through the heating element 14 to reach the vicinity of the discharge electrode 15, but the container is a cylindrical container. Therefore, most of the air taken into the container from the inlet can be easily sent to the vicinity of the discharge electrode 15 along the cylindrical space while being heated by the heating element 14 in advance. It is easy to keep the temperature of the air in the vicinity of the electrode 15 at a high temperature.

  Furthermore, in the air purification apparatus 1, the temperature of the gas that contacts the surface of the discharge electrode 15 is preferably heated to 100 ° C. or more by the heating element 14. In this case, moisture contained in the air is surely gas in the vicinity of the discharge electrode 15, so that condensation on the surface of the discharge electrode 15 is completely eliminated, and the intensity of the discharge plasma is stabilized. In addition, it is preferable that said heating temperature is 1000 degrees C or less so that the peripheral member, components, etc. which comprise the air purification apparatus 1 may not deform | transform, fuse | melt, break.

  In the air purification apparatus 1, at least a part of the container only needs to be formed by the dielectric 11. The electrodes are a discharge electrode 15 as a first electrode disposed on the inner surface of the dielectric 11 in contact with the inner space of the container and a second electrode disposed on the outer surface of the dielectric 11 in contact with the outer space of the container. Since the counter electrode 16 is included, the limited space in the container can be effectively used to increase the area of the electrode. For this reason, discharge plasma can be generated in a wide region, and an excellent decomposition effect can be obtained for harmful chemical substances in the air. Further, since the discharge electrode 15 and the counter electrode 16 can be easily fixed, the air purification device 1 can be manufactured at a low cost, and good quality can be obtained. Further, since the dielectric 11 serves both as the dielectric 11 for generating creeping discharge plasma in the vicinity of the discharge electrode 15 and the role as the structural material constituting at least a part of the container, the material used is saved. In addition, the air purification device can be manufactured at a low cost.

  Further, in the air purification device 1 configured as described above, the discharge electrode 15 has a plurality of openings and a peripheral portion surrounding the plurality of openings, and the counter electrode 16 is connected to the discharge electrode 15. Since it is disposed so as to face each other and has a peripheral portion surrounding the peripheral portion of the discharge electrode 15, it is possible to effectively use the limited space in the container to increase the area of the electrode. It can be generated in a wider area, and a more excellent decomposition effect can be obtained for harmful chemical substances in the air.

  In the above configuration, when a voltage is applied between the discharge electrode 15 and the counter electrode 16, the dielectric 11 is polarized, and positive charges are stored in the electrode having a higher potential according to the magnitude of the polarization. Thus, an equal amount of negative charge is stored in the electrode having the lower potential. In the air near the electrode end of the discharge electrode 15 (the edge of the opening of the discharge electrode 15 and the periphery of the discharge electrode), an electric field generated by the polarization of the dielectric 11 and an electric field generated by the charge stored in the electrode Strengthen each other and generate an electric field.

  Here, the relative dielectric constant and thickness of the dielectric 11 are represented by ε and d, respectively, and the magnitude of the voltage applied between the electrodes is represented by V (t) (the magnitude of the voltage V is a function of time t). The polarization of the dielectric 11 is proportional to the product of (ε−1) / d and V (t). Therefore, the greater the relative permittivity of the dielectric 11 and the thinner the thickness, the greater the polarization. Moreover, the polarization increases as the applied voltage increases. However, even if the polarization of the dielectric 11 is large, if the speed at which the polarization of the dielectric 11 increases is small, the boundary surface between the dielectric 11 and the air (the surface of the dielectric 11) is charged and is near the electrode end. Since the action to prevent the rise of the electric field in the air is dominant, the electric field in the air near the electrode end is not so strong. In order to generate a strong electric field in the air in the vicinity of the electrode end, the polarization of the dielectric is increased at such a high speed that it overcomes the speed at which charging of the interface between the dielectric 11 and the air (dielectric surface) increases. Alternatively, it is necessary to use the charge left on the interface between the dielectric 11 and the air (the surface of the dielectric 11) by reducing the polarization of the dielectric 11 at a sufficiently large rate. That is, changing the polarization of the dielectric 11 with time is an effective means for generating a strong electric field in the air near the electrode end.

  As described above, the polarization of the dielectric 11 is proportional to the product of (ε−1) / d and V (t), but the time change of the relative permittivity ε and the thickness d of the dielectric 11 is negligibly small. Therefore, in order to change the polarization of the dielectric 11 over time, it is necessary to change the voltage V (t) applied between the electrodes over time. As the time change rate of the applied voltage V (t) increases, the time change rate of the polarization of the dielectric 11 increases, and a strong electric field is generated in the air near the electrode end.

  The air purification apparatus 1 of the present invention generates discharge plasma by generating a strong electric field in the air near the electrode end of the discharge electrode 15 in this way. Since the planar region of the counter electrode 16 includes the planar region of the discharge electrode 15, the electric field is weak in the air near the electrode end of the counter electrode 16 (periphery of the counter electrode 16), and no discharge plasma is generated. Since the temperature of the air in the vicinity of the discharge electrode 15 is high, a part or most of the ozone generated by the discharge plasma is decomposed by heat. Therefore, it is possible to reduce the release of ozone harmful to the human body to the outside of the air purification device 1.

  The dielectric 11 only needs to be able to maintain its shape even when in contact with air having a temperature of several hundred degrees Celsius, and a commonly used general dielectric such as glass and ceramics can be used. Not. Moreover, the shape of the dielectric 11 should just be cylindrical, and it is not specifically limited, For example, a cylindrical thing can be used.

  As the discharge electrode 15, for example, a metal mesh such as stainless steel or tungsten, or a metal thin plate provided with a plurality of openings can be used.

  As the counter electrode 16, for example, a metal thin plate such as stainless steel or tungsten can be used. However, the configuration of the counter electrode 16 is not particularly limited thereto. For example, a metal such as tungsten, gold, silver, platinum, palladium, aluminum, copper, nickel, molybdenum, or a conductive material containing these metals. The film may be formed on the substrate physically or chemically, or by printing.

  The voltage applying unit 17 is not particularly limited as long as a high voltage that changes over time such as an alternating high voltage can be applied in a desired waveform, and a commonly used configuration can be appropriately applied.

  The air conditioning apparatus including the air purifying apparatus 1 configured as described above can be used for the purpose of obtaining an action of decomposing harmful chemical substances in the air using discharge plasma. It can be used by being incorporated in a cleaner, an air conditioner, a dehumidifier, a heater, or the like.

(Embodiment 2)
FIG. 2 is a schematic cross-sectional view showing a schematic structure of an air purification device according to Embodiment 2 of the present invention.

  As shown in FIG. 2, in this embodiment, since the outer side of the dielectric 11 constituting the air purification device 2 is covered with the heat insulating material 21, heat escapes from the outer surface of the dielectric 11, and the ambient temperature Can be prevented from rising.

  Further, since the cooling means 22 connected to the subsequent stage of the exhaust means 18 cools the air exhausted by the exhaust means 18, it is possible to prevent high-temperature air from being exhausted outside the air purification device 2. The temperature around the air purification device 2 can be prevented from rising.

  Other configurations of the air purification device 2 are the same as those of the air purification device 1 of the first embodiment.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited to these Examples.

  The air purification apparatus 1 shown in FIG. 1 was manufactured as described below.

  A cylindrical borosilicate glass having a diameter of 20 mm, a thickness of 1 mm, and a length of 100 mm was used as the dielectric 11 used in the air purification device 1 shown in FIG.

  As the discharge electrode 15, a stainless steel wire net having a length of 50 mm having 20 openings per 100 mm 2 is used, and as the counter electrode 16, a stainless steel thin plate having a thickness of 0.05 mm and a length of 60 mm is used. It was.

  The counter electrode 16 is grounded, and a sine wave AC voltage having a frequency of 60 Hz and an amplitude of 3.5 kV (peak-to-peak voltage of 7 kV) is applied to the discharge electrode 15 by the voltage applying means 17, thereby causing the discharge electrode 15 to be near the electrode end. A discharge plasma was generated.

  As the heating element 14, a spirally wound nichrome wire was placed between the lid 12 and the discharge electrode 15, and heat was generated by applying a sine wave AC voltage having a frequency of 60 Hz to both ends of the nichrome wire. At that time, the temperature of the air in the vicinity of the discharge electrode 15 was adjusted to about 200 ° C. by adjusting the amplitude of the applied voltage.

  As the lid 12, alumina having a shape in which an opening having a diameter of 2 mm was provided as an outside air inlet at the center of a disk having a diameter of 20 mm and a thickness of 1 mm was used. When the lid 12 was fixed to one end of the dielectric 11, a heat resistant adhesive tape was used.

  As the lid 13, alumina having a shape in which an opening having a diameter of 2 mm was provided as an exhaust port in the center of a disk having a diameter of 20 mm and a thickness of 1 mm was used. When fixing the lid 13 to the end of the dielectric 11 opposite to the lid 12, a heat resistant adhesive tape was used.

  As the exhaust means 18, a pump having an exhaust speed of 1.5 liters per minute was used. This pump is connected to the exhaust port of the lid 13 through a tube 19.

  In order to evaluate the decomposition performance of the air purification apparatus 1 configured as described above against harmful chemical substances, the following experiment was performed.

(Evaluation of decomposition performance against harmful chemical substances)
Ten air purification apparatuses 1 having the above-described configuration were produced and installed in a stainless steel container having an inside dimension of 1 m long × 1 m wide × 1 m high. Further, in order to make the concentration of harmful chemical substances in the stainless steel container uniform, one stirring fan was installed in the stainless steel container and operated.

  Before starting the operation of the air purification apparatus 1, formaldehyde was injected into the stainless steel container as a harmful chemical substance so that the concentration of formaldehyde in the stainless steel container was 0.3 ppm.

  As a method for measuring the formaldehyde concentration in a stainless steel container, a DNPH cartridge (model number: LpDNPH S10L) manufactured by Sigma Aldrich Japan Co., Ltd. is used for 10 minutes at a rate of 0.5 L / min. ) And the amount of formaldehyde derivatized with 2,4-dinitrophenylhydrazine (DNPH) contained in the cartridge was analyzed by high performance liquid chromatography. Also, if ozone is contained in the air that passes through the DNPH cartridge, the derivatization of formaldehyde is hindered, so the ozone is removed by passing it through an ozone scrubber made by Sigma-Aldrich Japan Co., Ltd. I let it pass.

(Test No. 1)
The operating condition of the air purification device 1 is that the exhaust means 18 is operated at a speed of 1.5 liters per minute, the heating element 14 is heated so that the temperature of the air near the discharge electrode 15 is about 200 ° C. A sinusoidal AC voltage having a frequency of 60 Hz and an amplitude of 3.5 kV (peak-to-peak voltage of 7 kV) was applied to the electrode 15.

  After operating the air purification device 1 for 3 hours using the above operating conditions, the operation of the air purification device 1 was stopped and left for 3 hours. It was 0.026 ppm as a result of confirming that the temperature of the air in the stainless steel container had dropped to room temperature and measuring the formaldehyde concentration in the stainless steel container using the above measurement method.

(Test No. 2)
As operating conditions of the air purification device 1, the exhaust means 18 is operated at a speed of 1.5 liters per minute, the temperature of the air in the vicinity of the discharge electrode 15 is kept at room temperature, and the frequency of the discharge electrode 15 is 60 Hz and the amplitude is 3.5 kV ( In the case of applying a sinusoidal AC voltage having a peak-to-peak voltage of 7 kV, the same measurement as that described above was performed.
After operating the air purification device 1 for 3 hours using the above operating conditions, the operation of the air purification device 1 was stopped and left for 3 hours. Then, as a result of measuring the formaldehyde concentration in the stainless steel container using the above measuring method, it was 0.175 ppm.

(Test No. 3)
As operating conditions of the air purification device 1, the exhaust means 18 is operated at a speed of 1.5 liters per minute, the heating element 14 is heated so that the temperature of the air in the vicinity of the discharge electrode 15 is about 200 ° C., and the discharge electrode In the case where the potential of 15 was kept at the ground potential, the same measurement as the above measurement was performed.

  After operating the air purification device 1 for 3 hours using the above operating conditions, the operation of the air purification device 1 was stopped and left for 3 hours. It was 0.295 ppm as a result of confirming that the temperature of the air in the stainless steel container was lowered to room temperature and measuring the formaldehyde concentration in the stainless steel container using the above measurement method.

(Test No. 4)
As operating conditions of the air purification device 1, the exhaust means 18 is operated at a speed of 1.5 liters per minute, the temperature of the air in the vicinity of the discharge electrode 15 is kept at room temperature, and the potential of the discharge electrode 15 is kept at the ground potential. The same measurement as that described above was performed.

  After operating the air purification device 1 for 3 hours using the above operating conditions, the operation of the air purification device 1 was stopped and left for 3 hours. Then, as a result of measuring the formaldehyde concentration in the stainless steel container using the measurement method, it was 0.293 ppm.

  Table 1 shows the measurement results described above.

表１から明らかなように、高温の空気中で放電プラズマを発生させた結果、空気中の有害化学物質に対する優れた分解効果が観測された。

As is apparent from Table 1, as a result of generating discharge plasma in high-temperature air, an excellent decomposition effect on harmful chemical substances in the air was observed.

  It should be considered that the embodiments and examples disclosed above are illustrative and non-restrictive in every respect. The scope of the present invention is shown not by the above embodiments and examples but by the scope of claims, and includes all modifications and variations within the scope and meaning equivalent to the scope of claims.

It is typical sectional drawing which shows schematic structure of the discharge plasma generator which concerns on Embodiment 1 of this invention. It is typical sectional drawing which shows schematic structure of the discharge plasma generator which concerns on Embodiment 2 of this invention.

Explanation of symbols

  1, 2: Air purification device, 11: Dielectric, 12, 13: Lid, 14: Heating element, 15: Discharge electrode, 16: Counter electrode, 17: Voltage application means, 18: Exhaust means, 19: Tube, 21 : Heat insulating material, 22: cooling means.

Claims (8)

A container having a gas inlet at one end, a gas outlet at the other end, and a closed internal space forming a flow path leading from the inlet to the outlet;
A heating element arranged in a region on the inlet side in the internal space of the container;
An electrode arranged in a region on the outlet side in the internal space of the container;
An air purification device comprising:   The air purifier according to claim 1, wherein the container is a cylindrical container.   The air purifier according to claim 1 or 2, further comprising exhaust means disposed outside the outlet of the container.   The temperature of the gas which contacts the surface of the said electrode is an air purification apparatus of any one of Claim 1 to 3 heated to 100 degreeC or more by the said heat generating body. At least a portion of the container is formed by a dielectric;
The electrode includes a first electrode disposed on the inner surface of the dielectric that contacts the inner space of the container, and a second electrode disposed on the outer surface of the dielectric that contacts the outer space of the container. The air purifier according to any one of claims 1 to 4, further comprising: The first electrode has a plurality of openings and a peripheral edge surrounding the plurality of openings,
The air purification device according to claim 5, wherein the second electrode is disposed so as to face the first electrode and has a peripheral portion surrounding a peripheral portion of the first electrode.   The air purification device according to any one of claims 1 to 6, further comprising a heat insulator arranged to cover the outside of the container.   An air conditioner comprising the air purifier according to any one of claims 1 to 7.

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