JP3717033B2 - Air cleaning apparatus and air cleaning method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air cleaning apparatus and an air cleaning method for cleaning air by generating ion / ozone wind by corona discharge.
[0002]
[Prior art]
There has been proposed an ozone generator that generates an ion / ozone wind by applying a high voltage between electrodes to cause corona discharge (Japanese Utility Model Publication No. 8-9137). In this ozone generator, using a cylindrical electrode and a needle-like electrode, the needle-like electrode is arranged at a substantially center with a certain interval outside one opening of the cylindrical electrode, and a high voltage is applied. As a result, ions and ozone are generated, and wind containing ions and ozone flowing out from the other opening of the cylindrical electrode is generated. Thus, in the said ozone generator, since an ozone wind is generated, an electric fan can be omitted and energy saving can be aimed at. Furthermore, this ozone generator collects fine dust and dust with an electrode.
[0003]
[Problems to be solved by the invention]
However, the conventional ozone generator actually has various problems. For example, the ozone wind generated by the conventional ozone generator is very small, and it is difficult to generate sufficient wind. In addition, a large amount of ozone is not so preferable in the environment, and the amount of generated ozone cannot be reduced. In addition, a sufficient deodorizing effect cannot be obtained, and a fragrance must be used to eliminate the ozone odor and the strong indoor odor. Furthermore, since fine dust and dust are collected by the electrode, it is necessary to clean the electrode. However, since a high voltage is applied to the electrode, sufficient care is required for handling.
[0004]
[Means for Solving the Problems]
The present invention solves the above-described problem, and controls generation of ozone to perform deodorization, sterilization, sterilization, and mold prevention, thereby reducing ozone damage.
[0005]
To this end, the present invention provides an air cleaning apparatus and method for cleaning air, comprising a trumpet having an opening at the bottom and a cylindrical body connected to the opening at the bottom, and titanium dioxide or / and oxidation on the surface. A wind tunnel portion in which zinc is vapor-deposited, a needle electrode disposed near the front axis of a trumpet in the wind tunnel portion, an annular electrode formed in the wind tunnel portion, and disposed at least in the vicinity of the needle electrode and the annular electrode A plate on which titanium dioxide and / or zinc oxide is deposited, and a high voltage is applied between the needle electrode and the annular electrode by a high voltage application unit to corona discharge and clean the air. It is what.
[0006]
In addition, the wind tunnel portion has the whole or part of the trumpet-like body as the annular electrode, and a plurality of the needle-like electrodes are arranged on or in the vicinity of the axis of the wind tunnel portion, on the opposite side of the trumpet-like body. A rod in which titanium dioxide or / and zinc oxide is vapor-deposited is disposed in the cylindrical body opening via an insulating cylinder, and the acicular electrode, annular electrode, wind tunnel, titanium dioxide and / or zinc oxide are disposed in a housing. A plate on which titanium dioxide or / and zinc oxide is vapor-deposited in the vicinity of the intake portion with the acicular electrode side of the housing as the intake portion and the cylindrical body side of the wind tunnel portion as the exhaust portion, The housing is a part of an air-conditioning duct, and is characterized in that powder of amorphous metal such as copper, nickel and phosphorus and aluminum oxide ceramic is applied to the inner wall surface.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing an embodiment of an air purifying apparatus according to the present invention, FIG. 2 is a view showing an electrode part of the air purifying apparatus main body, and FIG. 3 is an external view of the air purifying apparatus viewed from the exhaust part side. It is. In the figure, 1 is a housing, 2 and 8 are titanium dioxide vapor deposition plates, 3 is a needle electrode, 4 is a trumpet, 5 is a cylindrical body, 6 is an insulating cylinder, 7 is a titanium dioxide vapor deposition rod, and 11 is a mounting base. , 12 and 13 are support members, 14 is an exhaust part, and 15 and 16 are intake parts.
[0008]
In FIG. 1, a housing 1 is a housing case using, for example, a steel plate, plastic, or other synthetic resin, and the bottom surface is a wall surface, a ceiling surface, or a surface to be placed on a desk or the like. The exhaust part 14 is provided in the part, the intake part 15 or 16 is provided on the other side of the upper surface, and the intake part (not shown) is provided on the opposite side of the exhaust part 14. A titanium dioxide vapor deposition plate 2 is attached in the vicinity of the intake portions 15 and 16. Inside the housing 1, there is a mounting base 11, and an air purifying apparatus main body is mounted on the mounting base 11 and a titanium dioxide vapor deposition plate 8 is mounted.
[0009]
The support member 12 supports the needle-like electrode 3 on the mounting base 11, and the support member 13 is a wind tunnel including a trumpet body 4 and a cylindrical body 5, for example, an insulating tube 6 made of Teflon on the mounting base 11. The needle-like electrode 3 faces the intake portions 15 and 16 and the insulating cylinder 6 faces the exhaust portion 14.
[0010]
As shown in FIG. 2, the air cleaning device main body has one or a plurality of needle-like electrodes 3 and an electrode portion formed of a trumpet-like body 4 that forms an annular electrode facing the needle-like electrodes 3. The cylindrical body 5 and the insulating cylinder 6 are connected to the bottom opening of the trumpet-like body 4, and the titanium dioxide vapor deposition rod 7 is attached to the opening of the insulating cylinder 6. The trumpet-like body 4, the cylindrical body 5, and the insulating cylinder 6 form a wind tunnel, and titanium dioxide metal is deposited on the outer and inner surfaces of the needle-like electrode 3. FIG. 2A is a view seen from the needle electrode 3 or the titanium dioxide vapor deposition rod 7 in the axial direction of the wind tunnel portion, and FIG. 2B is a view seen from above.
[0011]
As described above, the annular electrode may be formed integrally with the entire trumpet-like body 4, including the cylindrical body 5, or may have a predetermined width on a part of the trumpet-like body 4 or on the inner surface thereof. May be formed. In that case, you may form not in an intermediate part but in the bottom part of the trumpet-like body 4, or a front-end | tip part conversely. A high voltage application device that generates a high voltage and applies a high voltage to the electrode portion (not shown) is provided, and the negative electrode is connected to the needle electrode 3 and the positive electrode is connected to the annular electrode of the trumpet 4. For example, by applying a high voltage between the needle electrode 3 and the annular electrode from a high voltage application device that generates a high voltage of 90,000 volts by a converter using a battery as a power source, a corona discharge is generated to generate the needle electrode. Ion / ozone wind is generated from 3 through the wind tunnel.
[0012]
When the trumpet-like body 4 is connected to one opening of the cylindrical body 5 as a wind tunnel as described above, air is sucked from the tip end side of the trumpet-like body 4 and the air is discharged from the other end opening of the cylindrical body 5. Make airflow easy to generate. This is demonstrated from wind tunnel experiments. Therefore, when a high voltage is applied from the high voltage application device so as to extend between the annular electrode formed on the trumpet 4 and the needle-like electrode 3 on the front shaft, the needle-like electrode 3 and the annular electrode Corona discharge occurs, negative ions and ozone are generated, and the breeze is generated in the direction from the needle-like electrode 3 to the annular electrode, and has the effect of amplifying this more strongly in the wind tunnel.
[0013]
Ozone has a bactericidal, deodorizing and smoke eliminating effect. Sterilization is due to a scientific mechanism caused by the strong oxidizing action of ozone. Therefore, compared with chlorine and other sterilization methods, the rate of sterilization by ozone is much faster, and the effect is several tens of times that of chlorine sterilization. For bacteria, sterilization is several hundred to several thousand times that of chlorine. It is said that there is power. Further, odorous smoke drifts in the air in the form of particles, and ozone has a function of decomposing carbon monoxide, which is the main component of tobacco smoke. One of the odor components is hydrogen sulfide, but ozone decomposes them completely, so that bad odor can be removed. Furthermore, ozone has a smoke-removing / bleaching action that decomposes nicotine and tar color components contained in tobacco smoke.
[0014]
In the natural world, negative ions are divided into valleys such as waterfalls and rapid rivers by the ionization phenomenon (Leonard phenomenon) of air when the water droplets are positively charged in the air and the water droplets are positively charged and the surrounding air is negatively charged. It occurs frequently in mountainous areas, and conversely, there are few positive ions in the dirty air in urban areas and living spaces. Negative ions have effects of purifying blood, activating cells, increasing resistance, regulating autonomic nerves, sedating, hypnosis, antiperspirant, increased appetite, lowering blood pressure, feeling refreshed, preventing fatigue and recovery It is well known.
[0015]
Titanium dioxide or zinc oxide itself is a catalyst, and since it does not change, its performance is maintained semipermanently. When this catalyst, titanium dioxide (particle size 7-10 nanometers), is exposed to ultraviolet rays, electrons and holes are generated on its surface, and the electrons reduce oxygen in the air to produce superoxide ions, Holes oxidize moisture to create hydroxyl radicals. Superoxide and hydroxyl radicals are collectively called active oxygen and have a strong oxidative decomposition action. This force kills bacteria attached to the surface of the photocatalyst and eliminates odor, that is, it becomes a powerful oxidant, and decomposes odor molecules, bacteria, etc. by the oxidation effect. Such a photocatalytic effect is exhibited by irradiation of indoor ultraviolet rays on the titanium dioxide vapor deposition plate 2, and is exhibited by ultraviolet rays on the titanium dioxide vapor deposition plate 8 based on corona discharge of the electrode portion.
[0016]
If black carbonized residue (sludge) of organic compounds, biological particles, and suspended particulate matter, which are pollutants, adheres to the electrode, the generation efficiency of ions and ozone deteriorates. When titanium dioxide metal is vapor-deposited on the surface of the wind tunnel portion consisting of the trumpet-like body 4 and the cylindrical body 5, in addition to the photocatalytic effect, indoor air pollutants, fine dust and dust are prevented from adhering to the wind tunnel portion. effective.
[0017]
Further, for example, a stainless mesh or the like is attached to the intake portion 15 and the exhaust portion 14. This is because large dust that short-circuits between the needle electrode 3 and the annular electrode 2 enters the housing 10. This is intended to prevent this. Furthermore, the housing 1 has an amorphous metal application surface on the inner wall surface. This amorphous metal application surface is formed by applying an amorphous metal of copper Cu, nickel Ni, phosphorus P and ceramic powder of aluminum oxide.
[0018]
Next, the air cleaning action by the air cleaning apparatus according to the present invention will be described. When a high voltage is applied between the needle-like electrode 3 and the annular electrode of the trumpet-like body 4 by a high-voltage applying device, negative ions and ozone breeze are generated by corona discharge and ultraviolet rays are generated. Among them, the breeze of negative ions and ozone is amplified in the direction from the trumpet 4 in the wind tunnel to the cylindrical body 5. Furthermore, the ultraviolet rays trigger the photocatalytic action of the titanium dioxide vapor deposition plate 8 with titanium dioxide, the fusion reaction of aluminum oxide provided on the inner wall of the housing 1, copper Cu, nickel Ni, phosphorus P, and aluminum oxide on the amorphous metal coated surface. Then, ozone (O ₃ ) is changed to initial active oxygen (O ₂ ). The titanium dioxide photocatalyst by the titanium dioxide vapor deposition plates 2 and 8, and the oxidation action of zinc oxide kills mold, bacteria, methicillin (MRSA), etc., alters formaldehyde, deodorizes, and removes other organic particles To do. Moreover, since titanium dioxide is vapor-deposited on the inner and outer surfaces of the needle electrode 3 and the wind tunnel portion, carbonized particles and the like do not adhere. Therefore, the conventional cleaning for removing the deposits from the electrode portion to which the high voltage is applied becomes unnecessary.
[0019]
In addition, as an internal arrangement state of the housing 1, an example in which two sets of air purifying device main bodies including a needle-like electrode 3, a trumpet-like body 4 that is an annular electrode, and a cylindrical body 5 are arranged in parallel is shown. It goes without saying that the number may be increased as appropriate according to the capacity required at that time, or only one set. In addition, if you have multiple sets of air cleaning devices, control the number of sets that operate according to the indoor air pollution environment and the time of day (working hours, night, morning, afternoon, holidays), etc. For that purpose, a control means using a timer or a calendar may be provided so that the activation and stop of the plurality of sets of air purification apparatus main bodies can be program-controlled. The titanium dioxide vapor deposition plate 8 is disposed on the bottom surface of the housing 1, that is, below the air cleaning device main body, but may be disposed above or on the side of the air cleaning device main body.
[0020]
FIG. 4 is a view showing an embodiment in which the air purifying apparatus main body according to the present invention is applied to an air conditioning duct, wherein 21 and 26 are titanium oxide vapor deposition plates, 22 are acicular electrodes, 23 is a trumpet, 24 is Cylindrical body, 25 is an insulating cylinder / titanium dioxide vapor deposition rod, 27 is an air conditioning duct mounting wall, 28 is an air intake port, and 29 is an air conditioning duct.
[0021]
In the embodiment described above, the air cleaning device main body is stored in the housing. However, when the air cleaning device main body is stored in the air conditioning duct 29 as shown in FIG. It is. In this case, the needle-like electrode 22 and the wind tunnel portion comprising the trumpet-like body 23, the cylindrical body 24, and the insulating cylinder / titanium dioxide vapor deposition rod 25 are attached directly to the air-conditioning duct 29, and in the vicinity of the electrode portion. The titanium oxide vapor deposition plate 26 is attached, and the titanium oxide vapor deposition plate 21 is attached in the vicinity of the air intake port 28 for taking in the air to be circulated. Furthermore, by providing an aluminum oxide or amorphous metal coating surface on the duct wall surface around the air cleaning device main body, air cleaning substantially equivalent to the air cleaning device shown in FIG. 1 can be performed. In addition, you may comprise so that the air cleaner apparatus main body can be accommodated in this as an air-conditioning duct of a predetermined length, and can be inserted and connected to the line of an air-conditioning duct.
[0022]
Moreover, when there exists a dust collector, the position in the air-conditioning duct which arrange | positions the air purifying apparatus main body is good also as the back. If the photocatalytic effect is weak with only the ultraviolet light generated by corona discharge between the electrodes at a position where no extraneous light enters, it is possible to further enhance the photocatalytic effect by installing an ultraviolet lamp in the vicinity of the main body of the air cleaner and the titanium oxide vapor deposition plate. be able to. In the same way as above, air is used as a device to deodorize, disinfect, sterilize, and maintain freshness of cans and fresh food items in the air introduction route inside the vending machine, in the showcase of fresh food items, and in the kitchen. A cleaning device main body, a titanium oxide vapor deposition plate, and an ultraviolet lamp can be arranged in combination.
[0023]
5 to 7 are views showing examples of the shape of the housing of the air purifying apparatus according to the present invention. Reference numerals 31, 47 and 52 denote exhaust parts, 32, 46 and 51 denote intake parts, 33 denotes an operation display part, 34 Is a mounting hole, 41 is an annular electrode, 42 is a needle electrode, 43 is a titanium dioxide vapor deposition rod, and 44 and 45 are support frames.
[0024]
The air purifying apparatus according to the present invention can correspond to the required amount for deodorization, sterilization, sterilization, etc. by appropriately increasing or decreasing the electrode part from one set to a plurality of sets as described above. FIG. 5 shows an example of the housing when the electrode portions are reduced to one or two sets. As shown in the front view of FIG. 5A, the side view of FIG. 5B, and the exhaust unit front view of FIG. 5E, the housing shown in FIG. As shown in the rear view of FIG. 5C, an intake portion 32 is provided so as to intake air from the back. In this case, as shown in FIG. 6, the support frames 44 and 45 are obliquely directed toward the exhaust part 47 for exhausting the electrode part composed of the annular electrode 41, the needle electrode 42 and the titanium dioxide vapor deposition rod 43 obliquely upward. To place. Therefore, as shown in the bottom view of FIG. 5D, the installation area of the housing can be made smaller than when the electrode portions are arranged in a plane, and the efficiency of the installation space can be increased.
[0025]
FIG. 7 shows an example of a relatively large housing in which four sets of electrode portions are arranged side by side with respect to the small housing. In the case of this housing, as shown in the front view of FIG. 7 (A) and the side view of FIG. 7 (B), an exhaust part 52 is provided so as to exhaust from the lower front side, and an intake part is provided so as to intake air from the upper surface. 51 is provided. The electrode portions are arranged in four rows as viewed from the front, corresponding to the partitions of the intake portion 51 and the exhaust portion 52, and may be attached so as to incline upward toward the back side or may be attached horizontally. Good. FIG. 7C is a rear view, and FIG. 7D is a bottom view.
[0026]
The results of the performance test using the air cleaning apparatus according to the present invention were as follows. First, as a deodorization test, when the air purifier is set in a plastic case that can be sealed, methyl mercaptan is injected from the rubber cap, and the concentration in the case is set to 100 ppm, the natural decay after 1 hour has elapsed is 10%. However, when the concentration in the case is set to 120 ppm and corona discharge is applied by applying a high voltage, that is, when the air purifier is operated, the attenuation after 1 hour is 87%. The concentration was 14 ppm.
[0027]
Next, as an antibacterial activity test, Escherichia coli and Legionella were dropped into the specimen, and the viable cell counts of the samples after 6 hours and 24 hours after storage were measured. In E. coli, the viable count from 7.6 × 10 ⁵ per sample to 8.3 × 10 ⁴ after 6 hours and 5.2 × 10 ³ after 24 hours in an environment of 25 ° C. On the other hand, when the air cleaning device was operated, it became 5.5 × 10 ⁴ after 6 hours and <10 (not detected) after 24 hours. In Legionella, the viable count increased from 6.6 × 10 ⁵ to 3.5 × 10 ⁵ after 6 hours and 3.1 × 10 ⁵ after 24 hours. When the device was turned on, it was <100 (not detected) after 6 hours. Similar results were confirmed for MRSA and E. coli (O157: H7).
[0028]
FIG. 8 is a diagram showing the measurement results for the removal of malodorous substances (formaldehyde). The condition is that when the malodorous substances (formaldehyde) are put into a 54 L sealed reaction vessel, the air purifier is not in operation and is in operation. It is the result of having measured the density | concentration change by gas chromatography. The conditions are temperature 25 ° C., humidity 70%, initial concentration 24.8 ppm, detector TCD (100 mV), column APS-201, INJ temperature 150 ° C., COL temperature 100 ° C. The measurement results are shown in FIG. As shown, the formaldehyde removal rate was 5.63 mg / h.
[0029]
FIG. 9 is a diagram showing measurement results for removal of malodorous substance (ammonia), and the conditions are a temperature of 20 ° C., a humidity of 60%, an initial concentration of 87.0 ppm, and an ammonia detector NH-275 (RIKEN KEIKI). As shown in FIG. 9, the measurement result was 47.0 mg / h at an ammonia removal rate of 40 ppm or more, and 13.3 mg / h at 40 ppm or less.
[0030]
FIG. 10 and FIG. 11 are diagrams showing measurement results for removing malodorous substances (acetaldehyde). The condition is that the malodorous substance (acetaldehyde) is put in a 54 L sealed reaction vessel, and the air purifier is not in operation. It is the result of having measured the concentration change by gas chromatography. The conditions are a temperature of 20 ° C, a humidity of 60%, an initial concentration of 50.0 ppm, a detector TCD (100 mV), a column APS-201, an INJ temperature of 150 ° C, and a COL temperature of 100 ° C. 10 only, the acetaldehyde removal rate is 4.36 mg / h as shown in FIG. 10, and the air purifier is operated by applying a high voltage to the electrode part (when the titania window is ON). As shown in FIG. 11, the acetaldehyde removal rate was 11.1 mg / h.
[0031]
Further, when 50 ml / s was passed through the air purifier according to the present invention at a temperature of 20 ° C. and a humidity of 60%, the generated ozone concentration measured by the iodine titration method was 0.00445 ppm / electrode per electrode, and titanium dioxide. The photocatalyst, and even the electrode without the oxidizing action of zinc oxide, can be significantly reduced. Also in the smoke extinguishing experiment, three cigarettes were put in a 155 L sealed reaction vessel, ignited, and when observed at a temperature of 21 ° C., a humidity of 72%, and a fluorescent lamp of 30 W × 4 with the initial state being digested, the present invention It was possible to visually observe a remarkable smoke eliminating effect when the air purifier was activated and when it was not activated.
[0032]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the above-described embodiment, the photocatalyst is used by vapor-depositing titanium dioxide metal, but titanium dioxide and zinc oxide metal or zinc oxide metal may be vapor-deposited. Moreover, although the several air purifying apparatus main body was arrange | positioned in parallel, ion-ozone wind can be amplified if an air purifying apparatus main body is connected in series, ie, multistage. Furthermore, the needle-like electrode and the annular electrode of the air cleaning device main body are each configured by a plurality of combinations, and a single needle-like electrode is disposed on the axis of the wind tunnel portion and close to the wind tunnel portion, and around it. A plurality of needle-like electrodes may be arranged farther from the wind tunnel than the needle-like electrodes on the shaft. The number of needle-like electrodes may be two or three on the upper and lower sides and the left and right, or a plurality of needle electrodes, and a high voltage may be applied by switching between them.
[0033]
【The invention's effect】
As is clear from the above description, according to the present invention, the acicular electrode is disposed in front of the wind tunnel portion connecting the trumpet-like body serving as the annular electrode and the cylindrical body, and a high voltage is applied to cause corona discharge. Therefore, it is possible to generate negative ions and ozone, and generate a breeze of ions and ozone without noise without using a motor fan. Moreover, the photocatalyst of the titanium dioxide vapor deposition plate arranged near the intake part, the photocatalyst of the titanium dioxide vapor deposition plate arranged near the electrode part using the light generated by the corona discharge, sterilization, sterilization by the effect of amorphous metal and negative ions, Deodorization and smoke removal can be performed with high efficiency.
[0034]
In addition, by arranging a plurality of needle-like electrodes and annular electrodes and selecting the number of use, that is, the electrodes to which voltage is applied, or by selecting the position of the annular electrode formed in the trumpet-like body, ions and Ozone wind generation can be adjusted and controlled. Furthermore, the housing is coated with amorphous metal such as copper, nickel, phosphorus and aluminum oxide ceramic powder on the inner wall surface, a titanium dioxide-deposited plate is placed near the inner wall, and titanium dioxide is placed on the cylindrical body side of the wind tunnel. Since the deposited titanium dioxide vapor deposition rod is arranged, the photocatalyst of titanium dioxide and zinc oxide enhances the effects of deodorization, sterilization, sterilization, and mold prevention, and changes the generated ozone to the initial active oxygen to reduce ozone damage. be able to.
[0035]
Furthermore, by depositing titanium dioxide on the surface of the electrode part, organic particles, suspended particulate matter, mold, microorganisms, bacteria, black particles adhering to the inside and the like can be carbonized to prevent adhesion. It is not necessary to clean the adhered substance on the electrode portion to which a high voltage is applied, and the maintenance can be made free. Furthermore, since the motor fan can be omitted, a small and light-weight one can be made, and it can be easily attached to the wall surface or ceiling surface, and it can be a wall-hanging type, a table or a shelf type.
[0036]
The air cleaning device according to the present invention combines a discharge electrode and a deposited film such as titanium oxide to generate corona discharge, generate negative ions and ozone, amplify the breeze, and the ultraviolet light and titanium dioxide. Since the deodorization, sterilization, sterilization, mold prevention, etc. are realized by the photocatalyst, it can be arranged and used not only in the dark night when there is no lamp light or extraneous light, but also in a space without lamp light or extraneous light. Therefore, it is arranged in a normal residence room, office room, hospital, factory, facility, clean room, kitchen, etc., and in an air conditioning duct, in a showcase, in a vending machine, in a car, etc. It can be used for deodorization, sterilization, sterilization, antibacterial, antifungal, product quality maintenance, etc. in various environments.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of an air cleaning device according to the present invention.
FIG. 2 is a diagram showing an electrode portion of the air cleaning device main body.
FIG. 3 is an external view of the air cleaning device as viewed from the exhaust side.
FIG. 4 is a diagram showing an embodiment in which an air cleaning device main body according to the present invention is applied to an air conditioning duct.
FIG. 5 is a view showing an example of the shape of the housing of the air cleaning device according to the present invention.
FIG. 6 is a view showing an example of the shape of the housing of the air cleaning device according to the present invention.
FIG. 7 is a view showing an example of the shape of the housing of the air cleaning device according to the present invention.
FIG. 8 is a diagram showing measurement results for removing malodorous substances (formaldehyde).
FIG. 9 is a diagram showing measurement results for removal of malodorous substances (ammonia).
FIG. 10 is a diagram showing measurement results for removing malodorous substances (acetaldehyde).
FIG. 11 is a diagram showing measurement results for removal of malodorous substances (acetaldehyde).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Housing 2, 8 ... Titanium dioxide vapor deposition plate, 3 ... Needle electrode, 4 ... Trumpet-like body, 5 ... Cylindrical body, 6 ... Insulating cylinder, 7 ... Titanium dioxide vapor deposition rod, 11 ... Mounting base, 12, 13 ... support member, 14 ... exhaust part, 15, 16 ... intake part

Claims (7)

In an air cleaning device for cleaning air,
A wind tunnel portion comprising a trumpet-like body having an opening at the bottom and a cylindrical body connected to the opening at the bottom and having titanium dioxide or / and zinc oxide deposited on the surface;
A needle-like electrode disposed in the vicinity of the front axis of the trumpet in the wind tunnel;
An annular electrode formed in the wind tunnel;
At least the acicular electrode and a plate deposited with titanium dioxide and / or zinc oxide disposed in the vicinity of the annular electrode are provided, and a high voltage is applied between the acicular electrode and the annular electrode by a high voltage application unit. An air cleaning device characterized by cleaning the air by corona discharge. 2. The air according to claim 1, wherein the wind tunnel portion includes a whole or part of a trumpet-like body as the annular electrode, and a plurality of the needle-like electrodes are arranged on or near the axis of the wind tunnel portion. Cleaning equipment. 2. The air cleaning apparatus according to claim 1, wherein a rod deposited with titanium dioxide and / or zinc oxide is disposed in an opening of the cylindrical body opposite to the trumpet through an insulating cylinder. The acicular electrode, annular electrode, wind tunnel, titanium dioxide or / and zinc oxide-deposited plate are accommodated in a housing, the acicular electrode side of the housing is an intake portion, and the cylindrical body side of the wind tunnel portion is an exhaust portion The air purifier according to claim 1, wherein a plate on which titanium dioxide and / or zinc oxide is deposited is attached near the intake portion. The air cleaning device according to claim 4, wherein the housing is a part of an air conditioning duct. 5. The air cleaning device according to claim 4, wherein the housing is coated with powder of amorphous metal such as copper, nickel and phosphorus and aluminum oxide ceramic on the inner wall surface. Formed in the wind tunnel portion, a wind tunnel portion comprising a trumpet-like body having an opening at the bottom and a cylindrical body connected to the opening in the bottom portion, a needle electrode disposed near the front axis of the trumpet-like body of the wind tunnel portion, and An annular electrode and a panel on which titanium dioxide or / and zinc oxide is vapor-deposited, and a high voltage is applied between the needle-like electrode and the annular electrode by a high-voltage applying unit to cause corona discharge and negative ions. An air cleaning method characterized by generating a breeze of ozone and cleaning the air using the photocatalytic action of titanium dioxide and / or zinc oxide.

Images