JP2007044576A - Ion air cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ion air cleaner which is capable of effectively trapping impurities such as dust, bacteria, smoke and the like in air. <P>SOLUTION: In the air cleaner utilizing an anion, it is provided with a housing 11, an opening 12 at one face in the housing 11, a suction fan 21 in the opening and an exhaust port 13 to discharge sucked air. It has a constitution that a plate 22 comprised of a conductor is arranged at the air current path 14 to the exhaust port 13 from the opening 12 and that a trapping sheet 30 to orient anions supplied from an ion generating device 20 and to attach fine particles charged in polarity opposite to the ionized particles is arranged in piles by arranging an electrode 23 to the surface of the plate. The plate 22 is made from copper or copper alloy. The trapping sheet is made of paper and can be put in and out from the outside so that it can be replaced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ionic air purifier that purifies air using negative ions.

  Various air purifiers have been provided for the purpose of collecting fine dust, dust, bacteria, etc. floating in the air and purifying the air. In addition, the mainstream is a method in which fine particles such as dust are charged and electrostatically collected in a collecting portion set to the opposite polarity. In addition to these, recently, positively charged air-cleaning methods have been adopted, in which particles such as dust and smoke that have been positively charged are neutralized with negative ions and dropped together to a size that cannot float. It was. Furthermore, a technique for detoxifying mold fungi and allergens contained in dust etc. by ions generated from oxygen molecules in the air and water vapor molecules is also applied.

  However, in the conventional negative ion generator, positive ions and negative ions are simultaneously generated at the same position, so that it is difficult to effectively use only negative ions. Moreover, it is difficult for conventional negative ion air purifiers to collect impurities in the air such as fine particles such as dust and smoke, and it is also ineffective against volatile organic compounds (VOC). If negative ions can be used effectively, it is considered that dust, bacteria, smoke, etc. in the air, which is generally charged on the positive side, can be captured efficiently. The inventions such as Japanese Patent Application Laid-Open Nos. 2001-321661 and 2003-326193 do not describe anything that can be a hint for this case.

JP 2001-321661 A JP 2003-326193 A

  The subject of this invention is providing the ion air cleaner which can capture effectively impurities, such as dust in the air, bacteria, and smoke. Another object of the present invention is to provide an ion air purifier capable of reliably capturing cigarette smoke, for example, on a tabletop.

  In order to solve the above problems, the present invention has a housing as an ionic air purifier that purifies air using negative ions, the housing has an opening on one side thereof, and a suction fan in the opening. The plate has an exhaust port for discharging the sucked air at an appropriate location, and a plate body made of a conductor is arranged in the air flow path from the opening to the exhaust port, and an electrode is arranged on the plate body surface to provide ions. It has a configuration in which a capturing sheet for directing negative ions supplied from a generator and adhering fine particles charged in the opposite polarity to the ionized particles is stacked on the plate. The air cleaner of the present invention preferably uses negative ions obtained by a negative ion generator.

  Although the negative ion generator does not have to be anything, the apparatus disclosed in Japanese Patent Application Laid-Open No. 2003-326193 mentioned above is suitable for the negative ion generator for an ion air cleaner of the present invention. . The apparatus of the present invention is advantageous for the present invention because only negative ions can be stably released at a high density.

  In the device of the present invention, the primary side input is input with a high frequency alternating current of, for example, 1 to 100 kHz, the secondary side output is, for example, 1 to 100 kHz, and the voltage is variable in the range of, for example, 3000 to 30000V. One side of one of the pair of high-frequency output transformers is grounded via a rectifier so that the other side has a negative high voltage and the number of pulses is, for example, 0.5 to 50 kilopulses / second. A DC voltage pulse is generated, and one side of the other high-frequency output transformer is grounded via a rectifier, so that the other side is a plus voltage and the number of pulses is, for example, 0.5 to 50 kilopulses / sec. A switching converter that generates a pulse and makes a pair of this minus high voltage DC pulse and plus high voltage DC pulse In one switching converter, plus high voltage DC pulse is, for example, a ratio of 1/20 to 1/100 with respect to minus high voltage DC pulse, and in the other switching converter, minus plus high voltage DC pulse. For example, a high voltage direct current pulse is intermittently converted and mixed at a ratio of 1/20 to 1/100, for example, and a negative high voltage direct current pulse or a positive high voltage direct current pulse is added to the ion emission electrode by a changeover switch. Thus, it is possible to use one having a configuration in which ions having a high reduction potential or high oxidation potential are generated at a high density.

  Output of negative high voltage direct current pulse and positive high voltage direct current pulse mixed intermittently by the switching converter is added to the discharge electrode via a changeover switch, so that negative ions of high reduction potential or positive potential of high oxidation potential are added. Ions can be released at high density. Therefore, only negative ions having a high reduction potential can be generated and used in the present invention. The fine ions of gas, fluid, and solid existing around the negative ions may be ionized, and a specific member such as a capture sheet can be negatively charged.

  The ion air cleaner of the present invention has a housing, and the main components are incorporated therein. The housing has an opening that is an air suction port and an exhaust port that is an air discharge port. A plate body made of a conductor is disposed in an air flow path from the opening to the exhaust port. A discharge electrode is disposed on the surface. The plate body is a member on the side to which impurities in the air, which is an object to be captured in the present invention, is attached. The discharge electrodes arranged with respect to the plate body surface are uniformly distributed over the entire large area, and direct negative ions supplied from the above-described ion generator toward the plate body surface.

  As the plate body, a good electrical conductor is suitable. In the tested range, copper and copper alloy are the best, followed by aluminum and its alloy. Further, metals that are conductors are generally suitable, and those made of carbon can also be used. A capture sheet is placed on the plate in an overlapping manner. The capture sheet is charged negatively by negative ions supplied from electrodes opposed to the plate and maintains the state. This capture sheet is suitably made of paper. The trapping sheet absorbs impurities in the air that are positively charged and captures them completely. Once captured, it is firmly attached, but when a certain amount of it is attached, it is desirable to dispose it without spreading and replace it with a new one.

  Since the present invention is configured and operates as described above, it can effectively capture impurities such as dust, bacteria, and smoke in the air. Conventionally, the trapping effect is sufficient. There is an effect that it is possible to reliably capture materials such as cigarette smoke that could not be said.

  Hereinafter, the present invention will be described in more detail with reference to illustrated embodiments. FIG. 1 shows an example of an ionic air purifier 10 according to the present invention, which is of a desktop type, has an inclined opening 12 at the upper part of a cylindrical housing 11 and an exhaust port 13 at the lower side surface. In addition, almost the entire area inside the housing is an air flow path 14 extending from the opening 12 to the exhaust port 13. The illustrated opening 12 is decorated by a grill 15 having a vent hole on the entire surface. An insertion port 16 for inserting and removing the capture sheet is provided slightly above the exhaust port 13 of the housing 11, and an insertion port 19 for inserting a plug 18 of an adapter 17 connected to a power source is provided.

  The ion generator 20 is fixedly disposed at a position inside the housing 11 that does not obstruct the air flow path 14. In the ion generator 20, as described above, the primary side input is input with high frequency alternating current of 1 to 100 kHz, the secondary side output is 1 to 100 kHz, and the voltage is in the range of 3000 to 30000V. One side of one of the pair of high-frequency output transformers that can be variably output is grounded via a rectifier so that the other side is minus high voltage and the number of pulses is 0.5 to 50 kilopulses / sec. A high voltage DC pulse is generated, and one side of the other high-frequency output transformer is grounded via a rectifier, so that the other side is a positive voltage and the number of pulses is 0.5 to 50 kilopulses / second. A pulse is generated, and this minus high-voltage DC pulse and plus high-voltage DC pulse are respectively applied to a pair of switching converters. In one switching converter, plus high voltage DC pulse is a ratio of 1/20 to 1/100 with respect to minus high voltage DC pulse, and the other switching converter is minus high voltage DC with respect to plus high voltage DC pulse. Pulses are intermittently converted and output at a ratio of 1/20 to 1/100, and a minus high voltage DC pulse or a plus high voltage DC pulse is added to the ion emission electrode by a changeover switch. It has a configuration in which ions having a potential or high oxidation potential are generated at a high density.

  The housing 11 is a combination type consisting of two left and right parts 11a and 11b, and a suction fan 21 is installed in the vicinity of the opening, and the direction of the suction airflow is from the center of the opening 12 to the center of the bottom of the housing. (See FIG. 3). A plate 22 made of a copper plate, which is a conductor, is disposed below the suction fan 21 and above the exhaust port 13. Further, negative ions are directed toward the surface of the plate. An electrode 23 is disposed. The illustrated electrode 23 has a copper annular holder 24 having a size suitable for the circular plate 22, and is arranged at equal intervals. The annular holder 24 is attached to the inner wall of the housing by a support portion 25. It is attached by the structure of fixing.

  In each figure, 26 is a socket, and 27 is an on / off switch, which supplies electric power to the electrical configuration including the suction fan 21 and the ion generator 20 by pushing, and cuts off the supply by re-pressing. Reference numeral 28 denotes a lamp for displaying an energized state. Each part is connected by wiring, and has an electrical configuration as shown in FIG. 29a is a grounding wire connected to the back surface of the plate 22, and 29b is a high-voltage wire that connects the ion generator 20 and the electrode 23.

  When the ionic air purifier 10 of the present invention configured as described above is started, the suction fan 21 rotates, air flows into the housing from the opening 12, and the airflow discharged from the exhaust port 13 through the air flow path 14. Is formed. At the same time, the ion generator 20 operates, and negative ions having a high reduction potential move toward the copper plate 22 that is a conductor from the electrode 23 at a high density. As a result, the guiding sheet 30 is negatively charged instantly, and the positively charged impurities such as dust, bacteria, and smoke are sucked and completely captured. The trapped impurities each fill the capture sheet 30 with a unique color. For example, the surface of the capture sheet 30 to which cigarette smoke has adhered increases in brown color over time.

Next, since the experiment which captures a volatile organic compound (VOC) was conducted using the ion air cleaner 10 of this invention, the result is shown to FIG. FIG. 5A is a graph showing an analysis result of an air sample before adsorption of VOC by negative ions by a gas chromatography mass spectrometer (GC / MS). In addition to air, benzene, acetic acid, toluene, p- It can be seen from the m / z value (mass / charge ratio) that xylene and m-xylene, as well as o-xylene and ethylbenzene are contained in substantial amounts. However, it can be seen that these components are almost disappeared after 4 hours from the start of the apparatus of the present invention. Only toluene remains, but this is also thought to be due to the large amount of the original amount or because the solvent is constantly remaining in the test atmosphere. The numerical values of the analysis results are shown in Table 1.
<Table 1>

* The peak numbers in the table are the numbers assigned to the peak vertices in FIG.

  As can be seen from Table 1, the reduction rate of each substance at the time point of 4 hours after the generation of negative ions is 50 ppm or less, and toluene also shows a reduction rate of 89%. Thus, the air cleaner 10 using negative ions of the present invention is suitable for capturing extremely small particles such as gas molecules and smoke.

  The present invention can be applied from a small air cleaner for personal use to a large air cleaner for a vehicle room or the entire room. For example, it can be used for pollen capture, clean air maintenance in hospitals, prevention of pathogenic germs in hospital rooms, and cleaning by capturing cigarette smoke filling the amusement store.

The perspective view which shows one example of the ion air cleaner which concerns on this invention. Similarly disassembled perspective view. Similarly longitudinal section. The block diagram of the apparatus of this invention similarly. The graph which shows the capture result before the operation | work of the apparatus of this invention (A) and after an operation | work (B).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Ion air cleaner 11 Housing 12 Opening 13 Exhaust port 14 Air flow path 15 Grill 16 Insertion port 20 Ion generator 21 Suction fan 22 Plate body 23 Electrode 24 Annular holder 25 Support part 29a Installation electric wire 29b High-voltage electric wire 30 Capture sheet

Claims (4)

A device that purifies air using negative ions,
The housing has an opening on one side of the housing, a suction fan in the opening, and an exhaust port for discharging the sucked air at an appropriate position, and an air flow path from the opening to the exhaust port. A plate made of a conductor is arranged, and an electrode is arranged on the surface of the plate to direct negative ions supplied from the ion generator, and fine particles charged in the opposite polarity to the ionized particles are attached. An ionic air cleaner having a configuration in which a capture sheet is placed on a plate. The ion air cleaner according to claim 1, wherein the plate is made of copper or a copper alloy. The ion air cleaner according to claim 1, wherein the capture sheet is made of paper and is provided so as to be able to be taken in and out from the outside for replacement. 2. The ion air cleaner according to claim 1, wherein the discharge electrode has an annular holder having a size suitable for the plate body, and has a plurality of brush-like electrodes installed in the holder at arbitrary intervals.

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