JP2010170971A - Air-cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-cleaning device, capable of increasing the speed of air flowing within a cylindrical positive electrode and minimizing deterioration of air cleaning efficiency, while enhancing the strength of a needle-like negative electrode. <P>SOLUTION: The air-cleaning device includes a cylindrical anode 54, a needle-like cathode 72, located substantially on the center line O of the cylindrical anode 54 and disposed with a predetermined space from the cylindrical anode 54; and a high-voltage generator 76, which causes corona discharge by applying DC high voltage between the anode 54 and the cathode 72 which are provided within a body 12. The corona discharge between the anode 54 and the cathode 72 causes an air flow containing negative ions, to flow from the cathode 72 side into the anode 54. A plurality of permanent magnets 96 is disposed around the anode 54. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a high-pressure generator that generates a corona discharge by applying a DC high voltage between a cylindrical anode and a needle-shaped cathode, and air containing negative ions flowing from the needle-shaped cathode side through the cylindrical anode by the corona discharge. The present invention relates to an air cleaning device for generating a flow.

  Conventionally, this type of air purifier is, for example, as an air purifier activator, in which a cylindrical positive electrode for performing corona discharge and a needle-shaped negative electrode are opposed to each other in a casing-like case, and a high-voltage power supply unit for generating a high voltage Etc. are provided. Then, a high voltage (negative voltage) is applied to the needle-shaped negative electrode via a cable from the high-voltage power supply unit, and a high voltage (positive voltage) is applied to the cylindrical positive electrode, from the needle-shaped negative electrode toward the opening periphery of the cylindrical electrode. Thus, corona discharge was generated, whereby ambient air was sucked into the cylindrical electrode from the needle-like negative electrode side and discharged out of the case to clean the air.

In order to improve the durability of the needle-like negative electrode against discharge, this air cleaning activator used a titanium oxide alloy formed by mixing titanium oxide with titanium in the needle-like negative electrode and the cylindrical positive electrode. . In addition, the needle-shaped negative electrode is attached by providing an L-shaped angle on the housing-like case, an insulator standing on the side of the angle, and the needle-shaped negative electrode being attached to the tip of the insulator (Patent Document 1 reference).
JP 2004-160383 A

  However, the durability against discharge was improved by using a titanium oxide alloy for the needle-like negative electrode and the cylindrical positive electrode. However, the thinner the needle-like negative electrode, the better the discharge efficiency. A quarter was formed straight and a taper needle was formed from there to the tip. For this reason, there existed a problem that a needle-like negative electrode was easy to bend.

  In the air purifier, a cylindrical positive electrode that performs corona discharge and a needle-shaped negative electrode are opposed to each other in a housing-like case, and a high-voltage power supply unit for generating a high voltage is provided. The size of the case of the apparatus was large enough to install a cylindrical positive electrode, a needle-like negative electrode, a high-voltage power supply unit, and the like. In this case, since the distance between the cylindrical positive electrode and the case wall on the side of the needle negative electrode and the surrounding parts is short, when air is sucked into the cylindrical electrode, air is not only from the extending direction of the cylindrical positive electrode but also from the surroundings. Was inhaling. For this reason, the load of the air flow sucked into the cylindrical electrode is large, and the speed of the air flow flowing through the cylindrical positive electrode is inevitably slowed.

  Further, the needle-shaped negative electrode is provided with an L-shaped angle on the case and an insulator is erected on the side surface of the angle, and is attached to the tip of the insulator. It was difficult to align the tip of the needle-shaped negative electrode. For this reason, the tip of the needle-like negative electrode is displaced from the center of the cylindrical positive electrode, and a good corona discharge cannot be generated.

  The present invention has been made to solve the problems of the related art, and can increase the velocity of the air flowing through the cylindrical positive electrode while increasing the strength of the needle-shaped negative electrode. An object of the present invention is to provide an air cleaning device capable of minimizing a reduction in cleaning efficiency.

  That is, an air cleaning device of the present invention includes a cylindrical anode, a needle-like cathode positioned substantially on the center line of the cylindrical anode and arranged at a predetermined interval from the cylindrical anode, and a cylindrical anode And a high-voltage generator that generates a corona discharge by applying a high DC voltage between the needle-like cathode and an air flow containing negative ions flowing from the needle-like cathode side through the cylindrical anode by the corona discharge. And a plurality of permanent magnets are arranged around the cylindrical anode.

  Moreover, the air purifier of the invention of claim 2 is characterized in that, in the above, the permanent magnet has adjacent magnetic poles having different polarities.

  In addition, in the air purifying device according to the third aspect of the present invention, in any one of the first or second aspect, the acicular cathode has a peripheral surface shape that gradually decreases toward the tip, and the center line and the circumference. The angle formed by the surface increases as it goes to the tip.

  According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a plurality of cylindrical anodes and needle cathodes are provided, and each needle cathode is fixed at a predetermined interval. A frame, the frame being fixed to the main body in the vicinity of the needle-like cathode, and a detachable front plate provided on the side from which the air flow is discharged from the plurality of cylindrical anodes, and one side of the front plate A first engagement piece that engages with the main body, and a second engagement piece that is provided on the other side of the front plate and engages and disengages in a state of being pulled into the main body side. It is characterized by that.

  The air purifier according to claim 5 is the air purifier according to any one of claims 1 to 4, wherein the space volume in the main body is a cylindrical anode, a needle-like cathode, and a high pressure disposed in the main body. The volume of the internal component including the generator is four times or more.

  According to the present invention, a cylindrical anode, a needle-shaped cathode that is positioned substantially on the center line of the cylindrical anode, and is disposed at a predetermined interval from the cylindrical anode, and the cylindrical anode and the needle-shaped cathode A high-voltage generator that generates a corona discharge by applying a high DC voltage between them is provided in the main body, and an air flow containing negative ions flowing in the cylindrical anode from the needle cathode side is generated by the corona discharge. Since a plurality of permanent magnets are arranged around the cylindrical anode, for example, as in claim 2, the permanent magnets are arranged so that adjacent magnetic poles have different polarities. An eddy current can be generated by attracting an air flow containing negative ions flowing through the cylindrical anode. As a result, it is possible to increase negative ions in the air flowing in the cylindrical anode. Therefore, the air cleaning efficiency of the air cleaning device can be greatly improved.

  According to a third aspect of the invention, in any one of the first and second aspects, the acicular cathode has a peripheral surface shape that gradually decreases toward the tip, and includes a center line and a peripheral surface. Since the angle formed by becomes larger toward the tip, the strength in the vicinity of the tip of the needle-like cathode can be increased. As a result, it is possible to make the needle-shaped cathode difficult to deform, and it becomes possible to make it difficult to deform the needle-shaped cathode while minimizing the reduction in discharge efficiency. Therefore, a good air cleaning effect can be maintained for a long period of time with the air cleaning efficiency of the air cleaning device being improved.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, a plurality of cylindrical anodes and needle cathodes are provided, and a frame in which each needle cathode is fixed at a predetermined interval is provided. The frame is fixed to the main body in the vicinity of the needle-shaped cathode, and is provided on a side of the front plate, and a detachable front plate provided on the side from which the air flow is discharged from the plurality of cylindrical anodes. A first engagement piece that engages with the main body, and a second engagement piece that is provided on the other side of the front plate and is detachably engaged when pulled into the main body side. For example, the front plate, the first engagement piece, and the second engagement piece can be positioned at the fixing position of the frame to the main body so that the tip position of the needle-like cathode is aligned with the center of the cylindrical anode. If it is designed, the center line of the cylindrical anode can be obtained by simply engaging the first engagement piece and the second engagement piece. It is possible to align the tip of the needle cathode to the opposing position of.

  In addition, the front plate can be attached to and detached from the main body simply by engaging and disengaging the first engagement piece and the second engagement piece, and the center of the cylindrical anode can be obtained by simply attaching the front plate to the main body. The tip of the needle-like cathode can be aligned with the opposing position located on the line. Thereby, since the position of the tip of the needle-like cathode can be aligned with the substantially center line of the cylindrical anode without requiring many years of experience and skill, a very suitable corona discharge can be generated. Accordingly, since the tip position of the needle cathode does not coincide with the substantially center line of the cylindrical anode, it is possible to surely avoid the disadvantage that the air flow passing through the cylindrical anode is reduced in speed. However, maintenance can be easily performed.

  The air purifier according to claim 5 is the air purifier according to any one of claims 1 to 4, wherein the space volume in the main body is a cylindrical anode, a needle-like cathode, and a high pressure disposed in the main body. Since the volume of the internal components including the generator is four times or more, it is possible to stably introduce a large amount of air in the main body space into the cylindrical anode. Thereby, the passage speed of the air which passes the inside of a cylindrical anode can be improved significantly. Therefore, the air cleaning efficiency of the air cleaning device can be greatly improved.

  The main object of the present invention is to prevent the inconvenience that the needle-shaped negative electrode is easily bent, and to easily align the tip position of the needle-shaped negative electrode with the center of the cylindrical positive electrode to improve the efficiency of air cleaning. Features. The purpose of improving the efficiency of air purification was realized by generating good corona discharge by improving the discharge efficiency while increasing the strength of the needle-like negative electrode.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an air cleaning device 10 showing an embodiment of the present invention, FIG. 2 is a front view of the air cleaning device 10 showing an embodiment of the present invention, and FIG. 3 is an air showing an embodiment of the present invention. 4 is a rear view of the cleaning device 10, FIG. 4 is a rear view of the air cleaning device 10 showing one embodiment of the present invention (with the back cover 24 removed), and FIG. 5 is an air cleaning device 10 showing one embodiment of the present invention. The front view of the flame | frame 56 which comprises is shown, respectively.

  As shown in FIGS. 1 and 2, the air cleaning device 10 according to the present embodiment is detachably attached to a main body 12 having a height of about 270 mm, a width of about 375 mm, and a depth of about 125 mm, and the rear surface of the main body 12. A casing shape is formed from the back cover 24 (shown in FIG. 3). A front cover 36 (corresponding to the front plate of the present invention) provided on the surface from which air flow is discharged from a plurality of cylindrical anodes 54 (shown in FIG. 8), which will be described later, is attached to and detached from the air cleaning device 10. It is provided freely. The front cover 36 will be described in detail later.

  As shown in FIG. 3, a back cover 24 that closes the rear opening of the main body 12 is provided on the rear surface of the main body 12, and the back cover 24 is detachably fixed to the main body 12 with a plurality of screws 28. ing. Further, the back cover 24 is formed with a plurality of mesh-like intake holes 26 for sucking air into the main body 12, and the air sucked into the plurality of cylindrical anodes 54 can smoothly pass through the intake holes 26. It has a large opening area. Reference numeral 22 denotes an air supply / exhaust hole for preventing the high pressure generator 76 described later from being heated.

  As shown in FIG. 4, a cylindrical anode 54 formed in a cylindrical shape having a diameter of about 20 mm is provided in the main body 12, and a needle-like cathode 72 is provided on one side of the cylindrical anode 54. The air flow from the needle cathode 72 side is discharged to the side surface (the surface opposite to the needle cathode 72). A needle-like cathode 72 (shown in FIG. 6) is provided at a substantially center of the cylindrical anode 54 and is disposed at a predetermined distance from the cylindrical anode 54 and has a needle-like portion with a sharp tip ST. Are provided, and a high-pressure generator 76, which will be described later, is provided. In this case, in the cylindrical anode 54, the surface opposite to the needle-like cathode 72 is referred to as a surface from which airflow is discharged, and this surface is referred to as the front surface. The acicular cathode 72 will be described in detail later.

  A partition wall 20 for partitioning the inside of the main body 12 is provided in the main body 12, and the space in the main body 12 is separated by the partition wall 20 from the cylindrical anode 54 and the needle-like cathode 72 side, and a high pressure generator. It is divided into two rooms on the 76 side. That is, only the components such as the cylindrical anode 54 and the needle cathode 72 and the frame 56 for attaching the cylindrical anode 54 and the needle cathode 72 are provided in the chamber on the cylindrical anode 54 and needle cathode 72 side. . As a result, the inside of the chamber on the cylindrical anode 54 and needle cathode 72 side is not affected by other components, and only air on the rear extension line of the cylindrical anode 54 is suitably placed in the cylindrical anode 54 with almost no load. It can be inhaled.

  The plurality of cylindrical anodes 54 and needle-like cathodes 72 are provided on one side (the left side in FIG. 4 in the embodiment) in the main body 12 and on the other side (the right side in FIG. 4 in the embodiment) across the partition wall 20. The high voltage generator 76 is provided for applying a high DC voltage between the cylindrical anode 54 and the needle cathode 72 to cause corona discharge. In this case, the opening surface of the cylindrical anode 54 and the tip ST of the needle-like cathode 72 are arranged with an interval of 2.0 to 3.0 mm. A negative electrode applied to one electrode is referred to as a needle-like cathode 72, and a positive electrode applied to the other electrode is referred to as a cylindrical anode 54.

  Here, the high voltage generator 76 outputs a DC high voltage (in this case, about 7.5 KV) to cause a corona discharge between the periphery of the opening of the cylindrical anode 54 and the needle cathode 72. An air flow containing negative ions generated by the corona discharge is generated (in this case, an air flow is generated from the needle cathode 72 side toward the cylindrical anode 54), and the air flow (air) is suspended in the air. When the dust comes into contact, negative ions are charged in the dust. And the dust charged with negative ions in the air passing through the intake hole 26 into the main body 12 and sucked into the cylindrical anode 54 is adsorbed to the anode side (cylindrical anode 54) and secured. The air flow is cleaned by the air flow including negative ions discharged from the needle cathode 72 side through the cylindrical anode 54 to the outside of the main body 12. In addition, a corona discharge is caused between the cylindrical anode 54 and the needle cathode 72 with a high direct current voltage, an air flow is generated from the needle cathode 72 side toward the cylindrical anode 54, and the cylinder contains air containing negative ions. Since the technology for cleaning the air passing through the anode 54 is a well-known technology, a detailed description thereof will be omitted.

  Then, a single cylindrical anode 54 and a single needle-like cathode 72 are taken as one set, and four sets are provided in the left-right direction in the main body 12 with an interval of about 45 mm. Three sets are provided with a set of one row (one step) with an interval of about 50 mm. One high-voltage generator 76 is provided for each of the cylindrical anode 54 and the needle-like cathode 72, and a total of three high-voltage generators 76 are provided corresponding to each row. That is, twelve sets of a single cylindrical anode 54 and a single needle-like cathode 72 are provided in the main body 12. The high-voltage generator 76 (cathode) side and each needle-like cathode 72 corresponding to each stage are electrically connected by a high-voltage wiring 78, and the high-voltage generator 76 (anode) side and the front surface of the main body 12 described later. The base plate 14 (shown in FIG. 12) provided on is electrically connected by an electric wire 80.

  The space volume in the main body 12 is set to be four times or more the volume of internal components including the cylindrical anode 54, the needle-like cathode 72, and the high-voltage generator 76 disposed in the main body 12. Specifically, the space volume on the corona discharge side of the main body 12 is set to be four times or more the volume of the cylindrical anode 54 and the needle cathode 72 arranged in the main body 12 and the components constituting them. In this case, the inside of the main body 12 is partitioned by the partition wall 20, and the plurality of cylindrical anodes 54 and needle-like cathodes 72 are provided on one side in the main body 12, and high pressure is provided on the other side across the partition wall 20. Since the generator 76 is provided, the volume of the high-pressure generator 76 does not affect the space volume in the main body 12 (the volume on the corona discharge side).

  As shown in FIGS. 5 and 6, the needle-like cathode 72 is fixed to a substrate column 58 erected on a lattice-like frame 56 in three rows and two rows. Specifically, a plurality of needle-like cathodes 72 (four in the embodiment) are vertically installed on a vertically long substrate 68 at predetermined equal intervals, and the needle-like cathodes 72 are fixed to the substrate 68 by soldering. Yes. Three substrates 68 are fixed to the substrate support 58 with screws 70 in parallel at predetermined intervals. That is, four needle-like cathodes 72 fixed to the frame 56 are provided at intervals of 45 mm in the left-right direction, and three stages are provided at intervals of 50 mm in the vertical direction.

  The frame 56 is made of a synthetic resin molded product having insulation with high precision, and a plurality of (four in the embodiment) mounting posts 60 are erected on one side. A mounting hole 62 is formed at the tip of the mounting column 60, and the mounting hole 62 (frame 56) is fixed to the base plate 14 of the main body 12 with screws 64 (shown in FIG. 12). That is, the needle-like cathode 72 is directly fixed to the base plate 14 of the main body 12 via the substrate 68 and the frame 56 without using an L-shaped angle as in the prior art. Position accuracy (position accuracy of the tip ST needle portion of the needle-like cathode 72) can be greatly improved.

  In this case, the tip ST of the needle-like cathode 72 can be reliably arranged on the substantially center line O (shown in FIG. 24) of the cylindrical anode 54 with a predetermined interval. As a result, it is possible to prevent the tip ST needle portion of the needle-shaped cathode 72 from being displaced from the approximate center line O of the cylindrical anode 54, so that it is generated between the needle-shaped cathode 72 and the cylindrical anode 54. The discharge efficiency can be greatly improved.

  The front cover 36 is made of a synthetic resin plate, and is provided with a plurality of exhaust holes 38 for exhausting airflow from the plurality of cylindrical anodes 54 from the inside of the main body 12 as shown in FIG. It has been. These exhaust holes 38 are provided through the front cover 36 and are provided corresponding to the respective cylindrical anodes 54. As shown in FIGS. 8 and 9, a current plate 40 made of a metal plate (for example, a stainless steel plate) that can be energized is provided on the rear surface (the main body 12 side) of the front cover 36. Is configured to be approximately the same size as the front cover 36.

  The energizing plate 40 is provided with a plurality of cylindrical anodes 54 (12 in the embodiment) having a thickness of about 1.5 mm, an inner diameter of about 16.0 mm, and a length of about 20.0 mm. . Each of these cylindrical anodes 54 is press-fitted into a hole formed in the energizing plate 40, and the front cover 36 side is fixed flush. The cylindrical anode 54 has an outer peripheral surface fixed to a milling machine, an outer peripheral surface at one end is cut by a predetermined dimension, and a perfect circle of the outer peripheral surface of the cylindrical anode 54 is formed. It is press-fitted into the hole. Thus, the cylindrical anode 54 is securely fixed to the energizing plate 40, and the cylindrical anode 54 and the energizing plate 40 can be reliably energized.

  A catching hinge 42 (first of the present invention) made of a metal plate (for example, a stainless steel plate) that can be energized is provided on an upper portion (the upper side of FIGS. 8 and 9) that is one side of the energization plate 40 (front cover 36). The catching hinge 42 is fixed by screws 44 in the vicinity of both the left and right ends of the energizing plate 40, respectively. An engagement pin 46 is caulked and fixed to the catching hinge 42 (in this case, it may be welded) (FIGS. 9 and 10). The engaging pin 46 is also composed of a metal bar (for example, a stainless steel bar) that can be energized like the catching hinge 42.

  A roller catch 48 (in the present invention) formed of a metal plate (for example, a stainless steel plate) that can be energized is provided on the lower side (lower side of FIGS. 8 and 9) on the other side of the energizing plate 40 (front cover 36). The roller catch 48 is screwed with screws 50 in the vicinity of both left and right ends of the current-carrying plate 40. The roller catch 48 is formed with a side rhombus-shaped engagement protrusion 52 (FIGS. 9 and 11). The engaging protrusion 52 is also formed of a metal plate (for example, a stainless steel plate) that can be energized like the catching hinge 42. In other words, the engaging pin 46 is electrically connected to the energizing plate 40 by the screw 44 through the catching hinge 42. In addition, the roller catch 48 of FIG. 11 is the figure visually recognized from the catching hinge 42 direction.

  Further, as shown in FIG. 12, a base plate 14 made of a metal plate (for example, stainless steel plate) that can be energized is provided on the front surface of the main body 12. A plurality of holder holes 16 are formed in the base plate 14 corresponding to the needle-like cathode 72. A plurality of magnet holders 84, which will be described later, can be seen facing the inside of the plurality of holder holes 16, and the needle-like cathodes 72 can be seen facing each other at the approximate center of each magnet holder 84. The magnet holder 84 will be described in detail later.

  A pin engagement piece 30 (corresponding to a first engagement piece of the present invention) to which an engagement pin 46 of the catching hinge 42 is engaged is provided on the upper part of the base plate 14, and the lower part An engagement roller 32 (corresponding to the second engagement piece of the present invention) with which the engagement protrusion 52 of the roller catch 48 is engaged is provided. The pin engagement piece 30 is configured to have a horizontally-turned U-shape (shown in FIG. 13) that opens the rear side of the main body 12.

  Further, the engaging roller 32 includes a pair of rollers 34 (not shown), and the both engaging rollers 52 are held between the urging members so that the always-engaging protrusion 52 (front cover 36) is attached to the main body 12. It is configured to be energized. The first engagement piece is constituted by the catching hinge 42 and the pin engagement piece 30, and the second engagement piece is constituted by the roller catch 48 and the engagement roller 32.

  Then, the front cover 36 is configured so that the engagement pin 46 of the catching hinge 42 at one end is disposed on the opening side of the pin engagement piece 30 as shown by the white arrow in FIG. Is engaged. Next, after the front cover 36 is rotated in the counterclockwise direction with the engaging pin 46 as a fulcrum (black arrow in the figure), as shown by the black arrow in FIG. Forty-eight engaging protrusions 52 are inserted between the pair of rollers 34 of the engaging roller 32.

  The engaging protrusion 52 of the roller catch 48 is inserted between the pair of rollers 34 of the engaging roller 32, and the engaging protrusion is in a state where the energizing plate 40 of the front cover 36 is in contact with the base plate 14 of the main body 12. Both rollers 34 come into contact with the side rhombus-shaped inclined portion 52 (inclined portion on the front cover 36 side). In other words, the engaging projection 52 of the roller catch 48 can be pulled out between the pair of rollers 34 of the engaging roller 32 toward the main body 12 in a state where the energizing plate 40 of the front cover 36 is in contact with the base plate 14 of the main body 12. It is stopped at no position. In this state, the pair of rollers 34 are energized in the holding direction with respect to each other (see the white arrows in FIG. 15), so that the engaging protrusion 52 (the current-carrying plate 40 of the front cover 36) has a predetermined urging force. 12, and the current supply plate 40 is pressed against the base plate 14.

  As a result, the front cover 36 is attached to the main body 12 and the energizing plate 40 (front cover 36) can always be brought into contact with the base plate 14 (main body 12) by the urging force of the engaging protrusion 52. The electrical connection between 40 and the base plate 14 can be made more reliable. The cylindrical anode 54 provided on the energizing plate 40 is connected to the base plate 14 from the energizing plate 40 or from the energizing plate 40 via the catching hinge 42, and then generates a high voltage via the electric wire 80. Since it is connected to the device 76, the high voltage generator 76 and the cylindrical anode 54 can be reliably electrically connected.

  That is, by engaging the catching hinge 42 and the roller catch 48, as shown in FIG. 16, the tip ST of the needle-like cathode 72 can be aligned with the opposing position located on the substantially center line O of the cylindrical anode 54. Become. Thereby, the tip ST of the needle-like cathode 72 can be surely arranged on the substantially center line O of the cylindrical anode 54, and the tip ST needle portion of the needle-like cathode 72 is prevented from being displaced. Therefore, the discharge efficiency generated between the acicular cathode 72 and the cylindrical anode 54 can be greatly improved. Therefore, a more reliable corona discharge can be caused between the cylindrical anode 54 and the needle cathode 72.

  Further, the front cover can be attached to the main body 12 only by engaging / disengaging the first engagement piece (the pin engagement piece 30 and the catching hinge 42) and the second engagement piece (the engagement roller 32 and the roller catch 48). 36 can be attached and detached. That is, the tip ST of the needle-like cathode 72 can be aligned with the opposing position located on the approximate center line O of the cylindrical anode 54 by simply attaching the front cover 36 to the main body 12 with one touch. Thereby, even a beginner can easily perform maintenance without requiring many years of experience and skill.

  Here, the acicular cathode 72 will be described in detail with reference to FIGS. The shape of the conventional acicular cathode 72 is roughly divided into three types. First, as shown in FIG. 17, the acicular cathode 72A has strong strength without deterioration even after long-term use but has a relatively low discharge efficiency, and secondly, the discharge efficiency is as shown in FIG. There are three types of needle-like cathode 72B, which is relatively high but easily deformed, and thirdly, needle-like cathode 72C having intermediate performance between needle-like cathode 72A and needle-like cathode 72B as shown in FIG.

  First, a needle-like cathode 72A that can be used for a long period of time is indicated by a one-dot chain line in FIGS. The needle-like cathode 72A has a base 74 formed in a cylindrical shape, and has a diameter of about 1.0 mm and a total length of about 13.0 mm. Then, the tip end side of the tip ST is about 11.0 mm from the base end (the end opposite to the tip ST) of the needle-like cathode 72A, and is formed into a needle shape that is sharply pointed toward the tip ST from there. Yes. That is, the needle-like cathode 72A forms a needle-like portion that is thinly needle-shaped toward the tip ST direction from a position approximately 2.0 mm away from the tip ST toward the base 74, and can be used for a long time. Strong strength is secured. FIG. 18 shows a view in which the shape on the tip ST side is clarified by compressing only the length without changing the diameter (thickness) of the needle-like cathode 72A shown in FIG.

  Next, a needle-like cathode 72B that has a relatively high discharge efficiency but is easily deformed is shown by a two-dot chain line in FIGS. The needle-like cathode 72B has a base 74 formed in a cylindrical shape, and is configured to have a diameter of about 1.0 mm and a total length of about 13.0 mm like the needle-like cathode 72. In this case, the needle-like cathode 72B is formed in the shape of a needle that is pointed about 5.0 mm from the proximal end side toward the tip end ST1 with a starting point H1 as a starting point H1. In other words, the needle-like cathode 72B forms a needle-like portion that is thin and long needle-like toward the tip ST direction from a point about 7.0 mm away from the tip ST in the base 74 direction, and the discharge efficiency is relatively low. It is configured to be high. FIG. 20 shows a diagram in which only the length is compressed without changing the diameter (thickness) of the needle-like cathode 72B shown in FIG. 19, and the shape on the tip ST side is clarified.

  Next, a needle-like cathode 72C having an intermediate performance between the needle-like cathode 72A and the needle-like cathode 72B is shown by a dotted line in FIGS. The needle-like cathode 72B has a base 74 formed in a cylindrical shape, and is configured to have a diameter of about 1.0 mm and a total length of about 13.0 mm like the needle-like cathode 72. In this case, a position of about 6.5 mm from the base end of the needle-shaped cathode 72C on the tip ST side is set as a starting point H1, and a cannon-shaped curve is formed from there to the tip ST direction (shown by a black curve line in the figure). The tip ST is formed into a finely pointed needle shape. That is, the needle-like cathode 72C is curved in a cannon shape from the position about 6.5 mm away from the tip ST in the direction of the base 74 toward the tip ST direction, and forms a needle-like portion that is sharpened like a needle. Thus, an intermediate performance between the acicular cathode 72A and the acicular cathode 72B is obtained. FIG. 22 shows a diagram in which the tip ST shape is clarified by compressing only the length without changing the diameter (thickness) of the needle-like cathode 72C shown in FIG.

  However, by using such a cannon-shaped needle-like cathode 72C, an intermediate performance between the needle-like cathode 72A and the needle-like cathode 72B can be obtained, but the vicinity of the tip ST of the needle-like cathode 72C becomes thicker ( Therefore, the discharge efficiency cannot be brought close to the acicular cathode 72B. In this case, needless to say, it is preferable that the acicular cathode 72 has a discharge efficiency as high as possible and can be used for a long time. Therefore, in the present invention, the shape of the needle-like cathode 72 has been developed in which the discharge efficiency is further closer to the needle-like cathode 72A than the cannon-type needle-like cathode 72C while maintaining the strength of the needle-like cathode 72.

  That is, as shown in FIGS. 23 and 24, the needle-like cathode 72 is formed in a peripheral surface shape that gradually decreases toward the tip ST, and a center line O (shown in FIG. 25) and a peripheral surface are formed. The angle is configured to increase as it goes to the tip ST. The diameter of the base 74 (cylindrical portion) of the acicular cathode 72 is 1.0 mm and the total length is about 13.0 mm. In this case, the needle-like cathode 72 is similarly formed with a needle-like portion that is gradually sharpened in a stepwise direction from the starting point H1 provided on the tip ST side about 5.0 mm from the base end. FIG. 24 shows a diagram in which the tip ST shape is clarified by compressing only the length without changing the diameter (thickness) of the needle-like cathode 72C shown in FIG.

  Specifically, as shown in FIG. 24, a virtual point H3 is provided at a position of about 16.0 mm on the extension line of the tip ST that is further away from the tip ST of the needle-like cathode 72 from the base end (needle-like shape). A virtual point H3 is provided on the center line O of the cathode 72). Then, a point separated from the base end part by about 5.0 mm in the tip ST direction is set as a starting point H1, and extends from there to a bending point H2 (position of about 8.0 mm from the base end part) toward the virtual point H3. Therefore, a needle-like portion that is bent and further tapered to the tip ST of the needle-like cathode 72 (13.0 mm from the base end of the needle-like cathode 72) is formed.

  In this case, the needle-like cathode 72 has a base 74 formed in a cylindrical shape, the first stage from the base point H1 to the bending point H2 is tapered in the direction of the virtual point H3, and the second stage from the bending point H2 to the tip ST. Up to this point, a needle-like portion having a pointed tip is formed. The shape of each needle-like cathode 72 is thicker to the vicinity of the tip ST (bending point H2) than the needle-like cathode 72B, and then the needle-like portion is tapered to the tip ST to form a needle-like cathode 72A. The tip ST of the needle cathode 72C is thicker than the needle cathode 72 (FIG. 25).

  Specifically, the needle-like cathode 72 is formed in a shape in which about 7.0 mm from the base point H1 to the tip ST is sharply pointed in a stepwise manner (two steps in this case) from the base 74 to the tip ST. The angle formed by the center line O of the cathode 72 and the peripheral surface is increased from the base 74 toward the tip ST direction. In this case, the diameter of the bending point H2 can be reduced compared to the case where the angle formed by the center line O and the peripheral surface decreases toward the tip ST direction. Is thicker and stronger than the needle-shaped cathode 72B, and the diameter of the needle-shaped cathode 72 from the bending point H2 to the tip ST can be made thinner than the needle-shaped cathode 72A and the needle-shaped cathode 72C. Thereby, discharge efficiency can be made comparatively high, maintaining the intensity | strength of the acicular cathode 72. FIG.

  On the other hand, a synthetic resin magnet base 82 having a plurality of magnet holders 84 formed thereon as shown in FIG. 26 is attached to the main body 12 side of the base plate 14 (FIG. 13). A through hole 88 formed through the magnet base 82 is provided at the approximate center of each magnet holder 84. The through holes 88 are provided in a number (12 locations) corresponding to the cylindrical anode 54. The through hole 88 is formed to have a hole diameter into which the cylindrical anode 54 provided in the front cover 36 can be inserted, and the cylindrical anode 54 is disposed inside the magnet holder 84 in a state where the front cover 36 is attached to the main body 12. It is comprised so that it can insert in the through-hole 88 of this.

  A plurality of positioning holes 90 are provided in the vicinity of the magnet holder 84 so as to penetrate the magnet base 82. The positioning holes 90 are disposed at substantially the same intervals as the plurality of mounting posts 60 provided in the frame 56, and are formed to have an inner diameter into which the mounting posts 60 can be inserted. The magnet base 82 is provided with a plurality of attachment portions 92, and the attachment portions 92 and the magnet base 82 are integrally formed.

  Then, a screw (not shown) is inserted into the screw hole 94 provided in the attachment portion 92 and is fixed to the main body 12, whereby the magnet base 82 is attached and fixed to the main body 12. By forming the mounting portion 92 integrally with the magnet base 82, the positional accuracy between the magnet holder 84 and the needle-like cathode 72 is greatly improved in a state where the magnet base 82 is mounted and fixed to the main body 12. .

  Further, as shown in FIG. 27, a plurality (12 in the embodiment) of storage portions 86 are recessed around the magnet holder 84, and the center of each storage portion 86 provided around the magnet holder 84 is The center of the through hole 88 is the same. Each storage portion 86 of each magnet holder 84 stores a permanent magnet 96 having the same size and the same magnetic force, and each permanent magnet 96 is fixed in each storage portion 86 with an adhesive. Yes. Adjacent permanent magnets 96 in each storage portion 86 formed around the magnet holder 84 are arranged in different polarities (N pole, S pole, N pole, S pole,...).

  When the magnet base 82 is attached and fixed to the main body 12 with the above-described configuration, the center of the circle formed by the plurality of permanent magnets 96 provided around each magnet holder 84 and the center of the cylindrical anode 54 are substantially the same. It is comprised so that it may become the same. That is, since the tip ST of the needle-like cathode 72 as described above is disposed on the substantially center line O of the cylindrical anode 54, the tip of the needle-like cathode 72 is attached with the magnet base 82 attached to the main body 12. The ST can be arranged with high accuracy at the approximate center of a circle formed by the plurality of permanent magnets 96 housed in the housing portions 86 of the magnet holder 84. Accordingly, the tip ST of the needle-like cathode 72 is arranged on the center line O of the cylindrical anode 54 (on the substantially center line of a circle formed by the plurality of permanent magnets 96) simply by attaching the front cover 36 to the main body 12. It becomes possible to make it.

  The air cleaning device 10 applies that negative ions react to magnetic force. That is, the air cleaning device 10 outputs a high direct current voltage from the high pressure generator 76, and an air flow (air) containing negative ions generated by corona discharge generated between the cylindrical anode 54 and the needle cathode 72. Is attracted by the magnetic force of the plurality of permanent magnets 96 provided around the cylindrical anode 54 and is wound around the ground of the plurality of permanent magnets 96 to move. As shown in FIG. 28, this air flow generates a cyclotron (vortex) in the process of flowing through the cylindrical anode 54 (a cyclotron is generated by the action of the magnetic force of a plurality of permanent magnets 96). With this cyclotron, it is possible to increase negative ions generated by corona discharge, and the speed of the air flowing through the cylindrical anode 54 can be greatly improved. Thereby, the air purification efficiency of the air purification apparatus 10 can be improved extremely. For the cyclotron, please refer to URL http: // masashi. issp. u-tokyo. ac. jp / yoshita / dscr. html, http: // www. las. u-toyama. ac. jp / physics / yoshita / i2 / 212. pdf # search = 'cyclotron motion', http: // www. jaist. ac. jp / ms / equipments / FT-ICR. See html.

  Here, when the permanent magnet 96 is not provided around the cylindrical anode 54 and when a plurality of permanent magnets 96 are provided around the cylindrical anode 54, the minus contained in the air passing through the cylindrical anode 54 is included. The experimental results of measuring the number of ions will be described. The air flow passing through the cylindrical anode 54 and exhausted from the exhaust hole 38 is applied with a high DC voltage (approximately 7.5 KV) to the cylindrical anode 54 and the needle cathode 72 by the high pressure generator 76. It is assumed that it is a normal constant speed generated when First, when the permanent magnet 96 is not provided around the cylindrical anode 54, the number of negative ions when passing through the cylindrical anode 54 is about 600,000 / cc, and a plurality of permanent magnets are provided around the cylindrical anode 54. When 96 is provided, the number of negative ions when passing through the cylindrical anode 54 is about 1.75 million / cc. That is, the number of negative ions contained in the air passing through the cylindrical anode 54 increased by about +1.1 million / cc by the action of the magnetic force of the plurality of permanent magnets 96 provided around the cylindrical anode 54. In the experiment, for the convenience of measurement, the number of negative ions per 1 cc in the airflow discharged from the uppermost four exhaust holes 38 formed in the front cover 36 (FIG. 2) was measured. For the convenience of measurement, the number of negative ions per cc in the air flow discharged from the upper four exhaust holes 38 formed in the upper front cover 36 was measured. The number of negative ions per cc is It goes without saying that the same result can be obtained even if the number of negative ions per 1 cc in the air flow discharged from one to twelve exhaust holes 38 is obtained. One cubic centimeter is expressed in cc.

  Thus, in the air cleaning device 10, a plurality of permanent magnets 96 are arranged around the cylindrical anode 54, and the magnetic poles of the adjacent permanent magnets 96 are arranged in different polarities. Thus, a cyclotron can be generated in the air flowing in the cylindrical anode 54. Due to this vortex, the amount of negative ions contained in the air flowing through the cylindrical anode 54 can be greatly increased.

  In addition, the needle-like cathode 72 has a peripheral surface shape that gradually decreases from the base portion 74 toward the tip ST, and the angle formed by the center line O and the peripheral surface increases toward the tip ST. The strength of the acicular cathode 72 (particularly the strength near the tip ST) can be increased. As a result, it is possible to make it difficult to deform the needle-like cathode 72 while minimizing the reduction in discharge efficiency, so that a good air cleaning effect can be obtained with the air cleaning efficiency of the air cleaning device 10 improved. It can be maintained for a long time.

  A plurality of cylindrical anodes 54 and needle cathodes 72 are provided, and a frame 56 is provided in which each needle cathode 72 is fixed at a predetermined interval. The frame 56 is fixed to the main body 12 in the vicinity of the needle cathode 72. At the same time, a detachable front cover 36 provided on the side from which the air flow is discharged from the plurality of cylindrical anodes 54 and a catching hinge 42 provided on one side of the front cover 36 and engaged with the main body 12. And a roller catch 48 that is provided on the other side of the front cover 36 and is detachably engaged in the state of being pulled into the main body 12, so that the needle-like cathode 72 is centered on the cylindrical anode 54 in advance. Since the fixing of the main body 12 of the frame 56 and the mounting position accuracy of the front cover 36, the catching hinge 42, and the roller catch 48 are improved so that the tip ST is aligned, Only engaging the hinge 42 and the roller catch 48, it is possible to align the tip ST of needle cathode 72 in opposed positions located substantially on the center line O of the cylindrical anode 54.

  Further, the front cover 36 can be attached to and detached from the main body 12 only by engaging and disengaging the pin engaging piece 30 and the catching hinge 42, and the engaging roller 32 and the roller catch 48, and the front cover 36 is attached to the main body 12. Only by doing this, the tip of the needle-like cathode 72 can be aligned with the opposing position located on the substantially center line O of the cylindrical anode 54. Thereby, since the position of the tip of the needle-like cathode 72 can be aligned with the substantially center line O of the cylindrical anode 54 without requiring many years of experience and skill, a very suitable corona discharge can be generated. . Therefore, even a beginner can easily maintain the air cleaning device 10, and the air discharged from the cylindrical anode 54 when the tip position of the needle cathode 72 is not aligned with the approximate center line O of the cylindrical anode 54. Inconveniences such as a reduction in the flow velocity can also be avoided reliably.

  Further, the space volume in the main body 12 is four times or more the volume of the internal components including the cylindrical anode 54, the needle-shaped cathode 72, and the high-voltage generator 76 disposed in the main body 12. Thus, it becomes possible to stably introduce a large amount of air in the space inside the main body 12 into the cylindrical anode 54. Thereby, the passage speed of the air passing through the cylindrical anode 54 can be greatly improved.

  In the embodiment, the needle-like cathode 72 is formed in a shape in which about 7.0 mm from the base point H1 to the tip ST is sharply tapered in a stepwise manner from the base point H1 (base 74) to the tip ST. Although the angle formed by the line O and the peripheral surface is increased toward the tip ST, the angle formed by the center line O and the peripheral surface may be the same angle between the base 74 side and the tip ST side. Also in this case, the discharge efficiency can be made relatively high while maintaining the strength of the needle-like cathode 72.

  Moreover, although the shape, dimension, angle, etc. of the air purification apparatus 10 were described, it cannot be overemphasized that a shape, a dimension, an angle, etc. may be changed in the range which does not deviate from the summary of the air purification apparatus 10. Of course, the present invention is not limited to the above-described embodiments, and the present invention is effective even if various other modifications are made without departing from the spirit of the present invention.

It is a perspective view of the air purifying apparatus which shows one Example of this invention. It is a front view of the air cleaner which shows one Example of this invention. It is a rear view of the air cleaner which shows one Example of this invention. It is a rear view of the air purifying apparatus (state which removed the back cover) which shows one Example of this invention. It is a front view of the flame | frame which comprises the air purifying apparatus which shows one Example of this invention. It is a side view of the flame | frame which comprises the air purifying apparatus of FIG. It is a front view of the front cover which comprises the air purifying apparatus which shows one Example of this invention. It is a rear view of the front cover which comprises the air purifying apparatus of FIG. It is a rear view of the front cover which comprises the air purifying apparatus of FIG. FIG. 5 is an enlarged side view of a catching hinge (first engagement piece) provided on one side of the front cover. It is a side surface enlarged view of the roller catch (2nd engagement piece) provided in the other side of the front cover of the air purifying apparatus. It is a front view (state which removed the front cover) of the air purifying apparatus which shows one Example of this invention. It is an enlarged side view of the pin engagement piece (1st engagement piece) provided in the air purifying apparatus. It is an enlarged side view of the 1st engagement piece which is provided in an air purifier and engages a main body and a front cover. It is an enlarged side view of the 2nd engaging piece which is provided in an air purifier and engages a main body and a front cover. It is a figure which shows the positional relationship of the cylindrical anode and needle-shaped cathode which comprise the air purifying apparatus of this invention. It is a front view of the acicular cathode for discharge of the conventional air cleaner. It is an enlarged front view of the acicular cathode for discharge (the figure which shortened length with respect to the diameter) of the air purifying apparatus of FIG. It is a front view of another acicular cathode for discharge of the conventional air cleaner. It is an enlarged front view of the acicular cathode for discharge (the figure which shortened length with respect to the diameter) of the air purifying apparatus of FIG. It is a front view of another acicular cathode of the conventional air purifying apparatus. It is an enlarged front view of the acicular cathode for discharge (the figure which shortened length with respect to the diameter) of the air purifying apparatus of FIG. It is a front view of the acicular cathode for discharge of the air purifying apparatus of this invention. FIG. 24 is an enlarged front view of a discharge needle-like cathode (a diagram in which the length is shortened with respect to the diameter) of the air cleaning device of FIG. It is each needle-shaped cathode comparison figure. It is a front view of the magnet base which comprises the air purifying apparatus of this invention. It is an enlarged view of the magnet holder formed in the magnet base which comprises the air purifying apparatus of FIG. It is a vertical side view of the magnet holder part which comprises the air purifying apparatus of this invention.

DESCRIPTION OF SYMBOLS 10 Air purifier 12 Main body 14 Base board 20 Partition wall 24 Back cover 30 Pin engagement piece (1st engagement piece)
32 engagement roller (second engagement piece)
36 Front cover (front plate)
42 Catching hinge (first engagement piece)
46 engaging pin 48 roller catch (second engaging piece)
52 engaging projection 54 cylindrical anode 56 frame 72 acicular cathode 74 base 76 high pressure generator 82 magnet base 84 magnet holder 96 permanent magnet O center line ST tip H1 starting point H2 bending point H3 virtual point

Claims (5)

A cylindrical anode, a needle-shaped cathode positioned substantially on the center line of the cylindrical anode and arranged at a predetermined interval from the cylindrical anode, and a direct current between the cylindrical anode and the needle-shaped cathode. A high-pressure generator that generates a corona discharge by applying a high voltage is provided in the main body, and the corona discharge generates an air flow including negative ions flowing in the cylindrical anode from the needle-like cathode side. In the device
An air cleaning device comprising a plurality of permanent magnets arranged around the cylindrical anode.   The air purifier according to claim 1, wherein the permanent magnet has adjacent magnetic poles having different polarities.   The needle-shaped cathode has a peripheral surface shape that gradually decreases toward the tip, and an angle formed by a center line and the peripheral surface increases toward the tip. Item 3. The air cleaning device according to Item 2. A plurality of cylindrical anodes and needle cathodes are provided, and each needle cathode has a frame fixed at a predetermined interval, and the frame is fixed to the main body in the vicinity of the needle cathode,
A detachable front plate provided on the side from which airflow is discharged from the plurality of cylindrical anodes;
A first engagement piece provided on one side of the front plate and engaged with the main body;
4. A second engagement piece provided on the other side of the front plate and detachably engaged in a state of being pulled into the main body. An air purifier according to claim 1.   The space volume in the main body is at least four times the volume of the internal components including the cylindrical anode, the needle-shaped cathode, and the high-pressure generator arranged in the main body. Air cleaning device to do.

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