JP2008142427A - Filter, air cleaner using it and air cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter ensured in air-permeable end increased in contact area and corresponding even to the production of heat, an air cleaner using this filter to have a high air cleaning capacity and an air cleaning method using the air cleaner. <P>SOLUTION: The filter has winding units each of which is obtained by winding a metal wire material into a coil form and flatly formed as a whole and is equipped with fins having gap parts and contact parts formed by positionally shifting the adjacent winding units to each other. The air cleaner equipped with the filter and the air cleaning method using it are also disclosed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a filter supporting a photocatalyst, an air cleaner using the filter, and an air cleaning method using the air cleaner.

  As an air purifier, there is disclosed an air purifier provided with purifying means comprising a photocatalyst for purifying air in an under space of an artificial plant and an ultraviolet light source for irradiating ultraviolet light on the photocatalyst. Specifically, an ultraviolet light source is provided in parallel with a filter coated with a photocatalyst such as titanium oxide. And as a filter, what provided the photocatalyst layer in the honeycomb-shaped dust collection filter, and what was formed in the hemisphere or the wave form is disclosed (patent document 1).

  In addition, as an air cleaner, a spiral guide plate having a photocatalyst on the surface is provided in the case for the purpose of increasing the flow path length of the untreated air that reacts with the photocatalyst, and the untreated air passes inside the case. What is moving so that it may turn around the light source along a guide plate is disclosed (patent document 2).

  Furthermore, as a vehicle deodorizing device, a device that arranges a phosphorescent material in the vicinity of an ultraviolet lamp to excite a photocatalyst is disclosed. In this vehicle deodorizing apparatus, when the ultraviolet lamp is turned off, the decomposition of the odorous substance is continued by the light emitted from the phosphorescent material that stores the light energy in advance when the ultraviolet lamp is turned on. As the filter, a photocatalyst and a deodorizing agent are attached, and a breathable material formed into a pleat shape, and a combination of a corrugated sheet and a flat sheet not breathable are disclosed ( Patent Document 3).

JP 2002-65822 A JP 2006-142270 A JP 2000-37449 A

  However, in Patent Document 1, since the photocatalyst is provided in the honeycomb-shaped dust collection filter, the contact area with the air cannot be increased, and the contact efficiency is not sufficient. Further, the light emitted from the light source cannot be irradiated so as to reach the inside of the honeycomb-shaped dust collection filter, and does not necessarily lead to the activation of the photocatalytic function. Therefore, there exists a fault which cannot fully exhibit a photocatalytic function.

  In Patent Document 2, the inside of the case is partitioned by a spiral guide plate, and no filter is provided. In particular, since the gas path to be processed is long, there is a drawback that it takes time to process the gas.

  Further, in Patent Document 3, in the case of a breathable filter formed in a pleat shape, although the contact area can be increased, the problem that the ventilation resistance is high remains. In the case of a corrugated sheet and a flat sheet having no air permeability, although air permeability is ensured, there remains a problem that the contact area is limited in the wave sheet space. In any case, in the former case, the light of the ultraviolet lamp only reaches one surface of the pleated filter, and the other surface becomes a shadow on the back surface, so that the activation of the photocatalyst is insufficient. . In the latter case, since the light from the ultraviolet lamp does not reach the inside of the wave sheet, the photocatalyst is not sufficiently activated.

  Furthermore, even if the filter of Patent Document 1 or 3 is combined, it is only ventilated using fibers or nonwoven fabrics conventionally used as a filter, so the ventilation resistance must be increased, The amount of ventilation as a filter was limited. In addition, this type of fiber or non-woven fabric filter has high ventilation resistance, low thermal conductivity, and low thermal emissivity, so it is difficult to suppress temperature rise, and is not preferable as a carrier for photocatalysts. Not found out.

  Next, since the filter made of fiber, nonwoven fabric, or the like used in the air cleaner of Patent Document 1 or 3 is made of resin, when the filter is used in an air cleaner, the resin filter is turned on by light that excites the photocatalyst. There is a drawback that it oxidizes and deteriorates.

  Therefore, in order to solve the above-described problems, the present invention provides a filter capable of ensuring air permeability and expanding a contact area, and capable of dealing with heat generation, and has a high air cleaning capability using this filter. An object is to provide an air purifier and to provide a cleaning method using this air purifier.

  The inventors of the present invention have made extensive studies to solve the above problems, but an air purifier including a light source formed from a coil carrying a photocatalyst and a phosphorescent material that activates the photocatalyst is excellent in energy efficiency. The present invention was discovered.

  That is, in the filter according to claim 1 of the present invention, a metal wire having a photocatalyst supported on its surface is wound in a coil shape to form a winding unit, and the entire unit is formed in a flat plane, and adjacent winding units. Are provided with fins having a gap portion and a contact portion that are displaced from each other.

  According to the above configuration, the air permeability from the gap portion of the winding unit is ensured, and at the same time, the contact area is expanded by the positional deviation of the winding unit, and a large contact with the photocatalyst is obtained. Further, the fin is subjected to processing such as assembling along the flat surface according to the degree of freedom from the winding unit. Furthermore, since the metal wire is used, the heat accompanying ventilation diffuses throughout the fins and is also radiated from the fin surface.

  In the filter according to claim 2, the fin is combined with a right-winding unit having a right-handed coil shape and a left-winding unit having a left-handed coil shape, and the right-winding unit and the left-winding unit are displaced from each other. And having a gap portion and a contact portion.

  According to the said structure, the double fin which consists of a flat plane which mutually intertwined from the winding free end of the winding unit of the right winding and the left winding, and integrated by making the winding connection end into both sides is formed. In the double fin, the right-handed and left-handed winding units are displaced by an amount corresponding to the wire diameter to have a gap, so that the density of the metal wire in the filter is increased and the stability of the form is imparted.

  The filter according to claim 3 is characterized in that the fin is wound in a spiral shape along a flat surface.

  According to the above configuration, since the winding unit is displaced along the flat surface, the winding unit is wound in a spiral shape along the flat surface with bending from the misaligned portion. In vortexing, it is possible to interpose a spiral gap between the flat surfaces or to wind them close to reduce the spiral gap. The upper surface of the spiral is configured on the same plane and is closely packed to increase the contact area.

  The filter according to claim 4 is characterized in that the fin is wound spirally along a flat surface.

  According to the above configuration, it is wound along the flat surface in the same manner as in claim 3, but is configured in a spiral shape in the vertical direction by displacing the flat surface up and down. The spiral filter is disposed in a volume efficient manner.

  The filter according to claim 5 is characterized in that the photocatalyst supported on the surface of the fin is supported by a binder mainly composed of diatomaceous earth or silicon dioxide.

  According to the above configuration, an optimum binder is selected.

  The filter according to claim 6 is characterized in that a phosphorescent material is carried on the surface of the fin.

  According to the above configuration, the phosphorescent material is carried by increasing the contact area due to the displacement of the contact portion and ensuring air permeability and permeability by the gap portion.

  The filter according to claim 7 is characterized in that a phosphorescent material is disposed in the vicinity of the fin.

  According to the said structure, the light emission from a luminous body acts with respect to the photocatalyst of a fin, and light emission permeate | transmits to the inner side through the space | gap part of a winding unit.

  The filter according to claim 8 is characterized in that the fin is made of aluminum or an aluminum alloy.

  According to the said structure, the heat accompanying ventilation is conducted by the whole fin, and is thermally radiated from the fin surface.

  The filter according to claim 9 is characterized in that the fin is made of aluminum or an aluminum alloy having an anodized layer, and a photocatalyst is supported on the surface or the layer of the anodized layer.

  According to the above configuration, the photocatalyst is supported on the fin with high adhesion through the anodized layer of aluminum or aluminum alloy.

  An air cleaner according to a tenth aspect includes the filter according to any one of the first to ninth aspects.

  According to the said structure, air permeability is ensured, the contact area of the filter which carry | supported the photocatalyst is expanded, and it becomes the air cleaner with which it was mounted | worn using the bending workability from a winding unit.

  The air cleaner according to claim 11 is provided with a light source for activating the photocatalyst.

  According to the above configuration, contact between the light source and the photocatalyst is ensured by the contact portion of the filter, while contact of the contact portion inside the light passage with the photocatalyst is achieved.

  The air cleaner according to claim 12 is characterized in that the light source includes a phosphorescent body.

  According to the said structure, even after the light source stops, contact with the photocatalyst of the contact part which permeate | transmits a space | gap part by light emission of the phosphor and is inside is achieved.

  The air cleaner according to a thirteenth aspect is characterized by including a reflection member for light from the light source.

  According to the said structure, the reflected light from a reflection part permeate | transmits a space | gap part and acts on the photocatalyst of the contact part inside.

  The air cleaner according to claim 14 is characterized in that air is blown along a flat surface of the fin.

  According to the said structure, while a ventilation path is ensured along the flat surface of a fin, the contact area by the unit of winding in a ventilation direction is ensured. When the fins are wound in a spiral shape or a spiral shape, a ventilation passage by a gap between the flat surfaces is secured, and contact by expanding the surface area in the blowing direction is possible.

  The air cleaner according to claim 15 is characterized in that air is blown across the flat surface of the fin.

  According to the said structure, while the ventilation path from the gap | interval part of a fin is ensured, the contact area by the contact part in a ventilation direction is ensured.

  The air cleaner according to claim 16 is characterized in that the phosphorescent material emits light having a wavelength of 250 nm to 450 nm, preferably 440 nm.

  According to the said structure, the wavelength light of the optimal phosphorescent material with respect to a photocatalyst is selected, and the photocatalyst of a contact part is excited effectively with an ultraviolet-ray.

  An air cleaning method according to claim 17 uses the air cleaner according to any one of claims 10 to 16.

  According to the above configuration, an air cleaning method can be obtained that is efficient and suppresses a temperature rise using the air cleaner described above.

  As described above, according to the filter of the first aspect, a large air permeability from the coil-shaped gap portion of the winding unit can be ensured, and the airflow resistance can be remarkably suppressed. In addition to being able to obtain large contact with the photocatalyst by expanding the area, it is possible to easily perform assembly processing along the flat surface due to the degree of freedom from the winding unit, and furthermore, diffusion of heat due to ventilation And heat dissipation. As a result, it was possible to provide a filter that can simultaneously achieve air permeability, increase the contact area of the photocatalyst, improve processability, and suppress heat generation.

  According to the filter of the second aspect of the present invention, the double winding is formed of a flat plane that is intertwined from the winding free ends of the right-handed and left-handed winding units and integrated with the winding connecting ends on both sides. A filter carrying a photocatalyst with fins can be provided. As a result, the right-handed and left-handed winding units are displaced by an amount corresponding to the wire diameter, and the gap and the permeability are ensured. At the same time, the density of the metal wire in the filter can be doubled. The photocatalyst can be excited efficiently by increasing the density while ensuring the air permeability and permeability.

  According to the filter of the third aspect of the present invention, it is possible to provide a filter excellent in workability, which can be easily bent into a spiral shape along a flat surface by bending from a coil-shaped misaligned portion. I was able to. At that time, it is possible to intervene a spiral gap between the flat surfaces or to wind them close to each other so as to reduce the spiral gap. Further, the contact area can be increased by forming the upper surface of the spiral on the same plane.

  According to the filter of the fourth aspect of the present invention, it can be easily wound along the flat surface as in the case of the third aspect, and the spiral shape in the vertical direction can be obtained by displacing the flat surface up and down. The spiral filter can be disposed in an air cleaner having a desired outer shape with high volume efficiency.

  According to the filter of the fifth aspect of the present invention, the photocatalyst can be supported on the fin with high adhesion. Furthermore, the adhesion can be reduced with time.

  According to the filter of claim 6 of the present invention, the distance between the phosphorescent material and the photocatalyst can be made close to the surface of the metal wire, and can be effectively excited with respect to a large contact area. The contact portion inside can be excited by light emission using the portion, and the photocatalytic function can be activated.

  According to the filter of the seventh aspect of the present invention, the light emitted from the phosphor can be caused to act close to the photocatalyst of the fin, and in particular, the phosphor of the phosphor to the inner side through the gap in the winding unit. The photocatalyst can be excited in a wide range by transmitting light emission.

  According to the filter of the eighth aspect of the present invention, the heat accompanying the ventilation is conducted to the entire fin and can be dissipated from the fin surface, and the air can be purified while maintaining the temperature at the ventilation.

  According to the filter of the ninth aspect of the present invention, the photocatalyst can be supported on the fin surface with high adhesion via the anodized layer of aluminum or aluminum alloy.

  Further, according to the air cleaner of claim 10 of the present invention, air permeability is ensured while the contact area of the filter carrying the photocatalyst is enlarged, and at the same time, excellent permeability and bending workability from the winding unit. It can be manufactured by utilizing a filter having

  According to the air cleaner of claim 11 of the present invention, the light source is ensured to contact with the photocatalyst by the contact portion of the filter, while excitation of the contact portion inside the light passage through the gap portion is excited to the photocatalyst. The photocatalytic function can be efficiently extended to the inside.

  According to the air cleaner of the twelfth aspect of the present invention, even after the light source is stopped, it is possible to achieve contact with the photocatalyst of the contact portion that is transmitted through the gap portion by the light emission of the phosphor, and the inside contact portion. High air cleanliness can be realized.

  According to the air cleaner of the thirteenth aspect of the present invention, since the reflected light is directed from the reflecting member to various angles, the gap is transmitted from various angles and efficiently acts on the photocatalyst in the contact portion inside. Can be made.

  According to the air cleaner of the fourteenth aspect of the present invention, since the surface area of the fins is large, even if the air is blown along the flat surface of the fins, the air is cleaned well. Therefore, since air resistance at the time of ventilation to a fin is small, the load of a ventilation fan is small and an air cleaner with high energy efficiency is obtained.

  According to the air cleaner pertaining to the fifteenth aspect of the present invention, it is possible to ensure ventilation paths from a large number of gaps and to sufficiently ensure the contact area of the contact portions in the blowing direction.

  According to the air cleaner of the sixteenth aspect of the present invention, the optimum wavelength light of the phosphor for the photocatalyst is selected, and the photocatalyst at the contact portion can be effectively excited.

  According to the air cleaning method of the seventeenth aspect of the present invention, it is possible to obtain an air cleaning method that is efficient and suppresses a temperature rise by using the air cleaner described above.

  Hereinafter, embodiments of a filter and an air purifier according to the present invention will be described with reference to the drawings.

  First, an embodiment (1) of the filter and the air cleaner of the present invention will be described.

  First, the air cleaner 1 of the present invention includes a filter 2 as shown in FIGS. 1 to 4, and the filter 2 has metal wires 161 and 162 each having a photocatalyst 14 supported on a surface wound in a coil shape. The winding unit 170 is formed and the whole is formed on the flat surface 173, and the adjacent winding units 165 and 166 are composed of the fins 16 having the gap portion 163 and the contact portion 164 that are displaced from each other.

  As shown in FIG. 4, the fin 16 is a double fin in which a metal wire 161 wound in a right-handed manner and a 162 wound in a left-handed manner are combined with each other from the winding free end. Specifically, the metal wires 161 and 162 as shown in FIG. 4 are wound in a coil shape to form a winding unit, and the whole is continuously formed in a flat shape, and the winding units 165 and 166 have a mutual width. The gap 163 and the contact portion 164 are formed so as to intersect with each other in the longitudinal direction. In particular, since the winding units 165 and 166 are displaced from each other, a large number of gap portions 163 and contact portions 164 are formed. The gap portion 163 is configured by a coil inner space to be wound, and a displaced wire diameter is inherent in the coil inner space.

  Specifically, adjacent winding units 165 and 166 are displaced by a distance of length 174 in the width direction and length 172 in the length direction. The length 174 of the displacement in the width direction is preferably 0.5 to 2 times the diameter 169 of the metal wires 161 and 162. When the length 174 of the displacement in the width direction is more than twice the diameter 169 of the metal wires 161 and 162, the density of the metal wires at the ends 167 and 168 of the fins 16 may be low. In addition, when the length 174 of the positional deviation in the width direction is less than 0.5 times the diameter 169 of the metal wires 12, 13, the metal wires have a large overlap and formability when formed flat by means such as rolling. May be low. Further, the length 172 of the displacement in the longitudinal direction is preferably 0.3 to 0.7 times, and particularly preferably 0.4 to 0.6 times the diameter 170 in the longitudinal direction of the winding units 165 and 166. .

  In addition, the diameter 171 in the width direction of the coil is not particularly limited, and can be appropriately set according to the required air purifier performance. In general, as the diameter increases, the surface area increases and the air cleaning function improves. Specifically, about 5 mm to 5 cm is appropriate.

  Next, as the material of the fin 16 formed by winding the wire, specifically, a metal material such as aluminum, copper, silver, or gold, or an alloy of these with nickel, magnesium, zinc, silicon, or the like is used. Can be mentioned. In particular, an aluminum-based material is preferably used because it has high light reflectivity and heat emissivity and is low in cost. Further, as the material of the metal wire of the fin 16, a corrosion resistant metal can be used. Depending on the application of the air cleaner, it may be used in a corrosive environment and is suitable for such a case. Examples of the corrosion-resistant metal include titanium, its alloy, and stainless steel. And the metal wire which comprises the fin 16 can be surface-treated in order to improve corrosion resistance as needed. Specific examples include nickel plating, copper plating, and silver plating.

  Further, when aluminum or an alloy thereof is used as a raw material, it is preferable to subject the surface to an anodized film treatment (alumite treatment). Thereby, corrosion resistance can be improved. The anodic oxide film treatment method can adopt a known process. Specifically, an oxide film is formed by performing electrolysis in a liquid such as oxalic acid, sulfuric acid, phosphoric acid, etc., using the treated product as an anode. can do. The anodized film treatment includes so-called white alumite and black alumite, both of which are applicable. Further, a resin such as polyethylene or polypropylene can be used as the material of the wire.

  Next, the fin 16 is specifically obtained by the following manufacturing method. First, a coiled metal wire 161 wound in a left-handed manner and a coiled metal wire 162 wound in a right-handed manner are combined with each other from the winding free ends 185 and 186 to form a double fin. And fin 16 is obtained by forming each metal wire 161, 162 flat by means, such as a roll press. Since the left-handed coil and the right-handed coil are combined, it is possible to crush satisfactorily without turbulence when the press is performed in the combined state. Then, the central portion of the band shape of the metal wires 161 and 162 is bent inward (inner side of the overlap) by pressing, and the front side portion of the overlap of the metal wires 161 and 162 is crushed and the center portion A flat surface 173 is formed. Further, the central portions of the metal wires 161 and 162 projecting outward are bent inward to reduce the thickness, and an uneven structure in which the metal wires are complicatedly complicated is formed at the end portions 167 and 168. As the pressurizing conditions, it is preferable to appropriately set the pressure of the roll press, the roll press angle, and the like so that the adjacent winding units 165 and 166 are in close contact with each other.

  Note that the contact portions 164 where the winding units 165 and 166 are in contact with each other are wire members that are in contact with each other using bonding means such as soldering, solder plating, adhesive, and adhesive, and bonding means such as vibration welding and flash welding. By fixing so that it may not leave | separate, mutual close_contact | adherence of each winding unit 165,166 is performed reliably, and the mechanical stability of the fin 16 whole improves.

  Next, the photocatalyst 14 is supported on the surfaces of the metal wires 161 and 162 having a large surface area. When the photocatalyst 14 is a powder, the surface area is preferably large, and the particle size of the powder is preferably small so as not to aggregate. The term “supporting” means that the photocatalyst 14 is formed on all or part of the surface of the fin 16.

  Further, as the photocatalyst 14, a known photocatalyst such as titanium oxide, zinc oxide, cadmium sulfide or the like can be appropriately selected and used as necessary, but titanium oxide is harmless and chemically stable, It is inexpensive and is most preferably used. In the case of titanium oxide, either anatase or rutile can be used as the crystal form, but the anatase type is more preferable because it has higher photocatalytic ability. The photolytic ability of the coil 3 can be adjusted by increasing or decreasing the content of the photocatalyst as necessary.

  Further, when a binder mainly composed of diatomaceous earth or silicon dioxide is used in the solution in which the photocatalyst is dispersed, a photocatalyst coating film with little change with time is obtained. In particular, diatomaceous earth is porous, can carry a large amount of photocatalyst, and adsorbs moisture and the like decomposed by the photocatalyst.

  As a method for supporting the photocatalyst 14 on the fin 16, there is a method in which a photocatalyst is dispersed in a solution or the like, the fin 16 is dipped in the solution, or the solution is applied to or sprayed on a coil. At the time of drying such as application, since the film thickness decreases, a part of the photocatalyst may be exposed from the application film.

  Further, when the fin 16 is anodized, a photocatalyst is supported on the surface of the anodized layer or in the anodized layer.

  Further, as shown in FIG. 4, a phosphorescent body 15 can be formed on the surface of the fin 16, and the phosphorescent body 15 is preferably a powder. Here, the phosphorescent material refers to a material having a phosphorescent material as a main component.

  Further, as shown in FIGS. 2 and 3, the fin 16 can include a phosphorescent body 20 in the vicinity thereof. The phosphorescent body 20 at this time is preferably a bowl-shaped body mainly composed of a phosphorescent material.

  As a material of the phosphor 15 or phosphor 20, there is a new substance that does not contain a radioactive substance, has a high afterglow brightness, has a long afterglow time, has weather resistance and durability, and is different from the conventional nocturnal paint substance. Several have been developed and sold. Examples of such materials include calcium aluminate or strontium aluminate, or N Nightlight (trade name) of Nemoto Special Chemical Co., Ltd., which has this as a main component. This is made of high-purity alumina as a main raw material, mixed with calcium carbonate or strontium carbonate and several rare earth elements such as europium, neodymium, dysprosium as an activator, and has a reducing atmosphere of 1300 ° C. or more. It is manufactured by baking at high temperature for about 3 hours and then cooling, further pulverizing and sieving.

  If the wavelength of the light of the said phosphors 15 and 20 is 250 nm-450 nm, Preferably it is 440 nm, it is suitable for activation of the photocatalyst 11 by an ultraviolet-ray.

  The method of supporting the phosphorescent body 15 obtained as described above on the fins 16 is the same as in the case of the photocatalyst 14. Further, the phosphorescent body 15 can be carried simultaneously with the photocatalyst 14. When the phosphorescent body 15 is carried on the surface of the fin 16, a part or all of the phosphorescent body 20 can be removed.

  As the luminous body 20, the luminous body 15 obtained as described above can be used by filling a mesh bag. Moreover, the phosphorescent body 20 can be obtained by press-molding the phosphorescent body 15, sintering after the molding, or molding the powder using a resin or the like as a binder. In addition, as a phosphorescent body for the said press molding etc., the thing of a particle size different from the phosphorescent body 15 carry | supported on the surface of the fin 16 can be used.

  As shown in FIG. 6, the air cleaner 1 is composed of five or more fins 16, and the fins 16 have a large surface area. The number of the fins 16 may be more than five or less than five.

  Further, the band-like fins 16 are bent and held in a spiral shape so that the gaps 163 of the fins 16 face each other as shown in FIG.

  The fin 16 is formed with a gap between adjacent turn units 190 and 191. Specifically, when the fin 16 is wound in a spiral shape in the longitudinal direction, the winding units 165 and 166 adjacent to each other of the fin 16 intersect each other and are wound in a coil shape. Since the metal wires 161 and 162 are formed flat, the central portions 180, 181, 182, and 183 of the fin 16 are warped in accordance with the shape of the spiral wound. Further, when each fin 16 is wound in a spiral shape, the central portions 180, 181 and 182 and 183 of the fin 16 are warped in the center direction and the radial direction of the spiral. And the heat dissipation promotion part 192 which is the clearance gap which can be ventilated is formed between each rotation unit 190,191. Thereby, the fin 16 has a large contact area with air and functions as an air vent.

  Next, the air cleaner 1 using the fins 16 will be described.

  FIG. 1 is a perspective view showing the configuration of the air cleaner of the present invention. As shown in FIGS. 1 and 6, the air cleaner 1 of the present invention includes an air cleaning unit 10 for purifying air and an introduction unit 30 such as a fan for introducing air into the air cleaning unit 10. Outlined. The air cleaning unit 10 is placed on a base 40 having an upper opening, and the introduction unit 30 is provided inside the base 40.

  The air cleaning unit 10 includes a case 11 having an intake port 111 and an exhaust port 112, and a purification unit 12. The purification unit 12 is provided inside the case 11 and includes a fin 16 having a photocatalyst 14, a light source 13, and a phosphorescent body 20.

  The purification unit 12 also functions as a plurality of spiral-shaped fins 16 stacked, fin holding members 17 and 18 for holding the plurality of fins 16, and a core material for supporting the fin holding members 17 and 18. And the light source 13 to be configured. The fin holding members 17 and 18 are fitted into purifying means holding portions 113 and 114 formed on the inner peripheral surface of the case 11, respectively, so that the purifying portion 12 and the case 11 are integrated. In addition, it is preferable that the fin holding members 17 and 18 have a mesh shape so that air can be sucked and discharged.

  Further, the flat surface 173 of the fin 16 is provided so as to face the light source 13, and is configured so that light or air can pass through the gap portion 163 of the fin 16. Here, the flat surface 173 is a flat surface when the metal wire materials 161 and 162 are wound in a coil shape to form a winding unit and the whole is formed flat.

  Next, the air cleaner 1 includes a phosphorescent body 20 in the gap between the plurality of fins 16. At this time, it is preferable to arrange the phosphor 20 so that light and air pass through the gaps of the fins 16 and the phosphor 20. Further, the phosphor 20 can be formed in the gap between the fins 116 formed in a spiral shape. At this time, it is preferable to provide the light from the light source 13 provided on the inner periphery so as to reach the outermost fin 16 or the phosphorescent body 20 located on the outermost periphery.

  The phosphorescent body 20 may be one piece or plural pieces. Moreover, the phosphorescent body 20 can have any form such as a bowl, a granule, a rod, and a cylinder. The distance between the phosphorescent body 20 and the fins 16 is preferably small so as not to block the blowing.

  Further, when air cleaning is performed in a short time, the phosphorescent body 20 can be formed on the outer periphery of the fin 16. At this time, light emitted from the phosphor 20 to the outer periphery is also irradiated to the photocatalyst 14 by the light reflecting plate 21 of the case 11.

  Next, the light source 13 may include a black light, a light emitting diode, or an ultraviolet irradiation lamp. The air cleaner can also activate the photocatalyst 14 using a black light, a light emitting diode, or an ultraviolet irradiation lamp in place of the phosphors 15 and 20. In order to efficiently activate the photocatalyst 14 with the light from the light source 13, the distance between the light source 13 and the fins 16 or the phosphors 15 and 20 is preferably short.

  The light source 13 is provided at a position where the photocatalyst 14 is activated or the phosphorescent body 20 is excited, and the phosphorescent body 20 is provided at a position where the photocatalyst 14 is activated. Here, the light source 13 means what emits light, and the phosphors 15 and 20 are also included in the light source.

  In addition, as shown in FIG. 2, when the light source 13 is provided on the inner periphery of the fin 16 or the phosphor 20, the light from the light source 13 is efficiently passed through the gap of the fin 16 or the phosphor 20, The phosphor 20 is irradiated.

  Further, in the case of activating the photocatalyst 14 in a short time to purify the air or exciting the phosphors 15 and 20 in a short time, the light source 13 is formed on the outer periphery of the phosphor 20 or the fins 16. Is also possible. At this time, light emitted from the light source to the outer periphery is also applied to the phosphors 15 and 20 or the photocatalyst 14 by the light reflecting plate 21 of the case 11.

  Furthermore, the light source 13, the phosphor 20 and the fins 16 can be provided concentrically in this order from the inner peripheral side. Further, the light source 13, the phosphor 20 or the fin 16 can be formed vertically, horizontally, or obliquely depending on the application of the air cleaner 1 or the like.

  The case 11 has a cylindrical shape and includes an intake port 111 and an exhaust port 112, and the air sent by the introduction unit 30 is sent from the intake port 111 to the exhaust port 112. Purifying portion holding members 113 and 114 for holding the purifying portion 12 are formed on the inner peripheral edges of the intake port 111 and the exhaust port 112, respectively. A light reflecting member 21 that reflects light from the light source 13 is provided on the inner surface of the case 11.

  Next, the case 11 is provided with the light reflecting member 21 made of a light reflecting material on the inner periphery of the case, and the entire case 11 may be the light reflecting material or the translucent material. A part of the light reflecting material or the light transmitting material may be used. Further, a part of the case 11 may be formed of a light reflecting material and the remaining part or all of the case 11 may be formed of a light transmitting material.

  As the light reflecting material, a metal such as aluminum, titanium, magnesium, the above alloy, stainless steel, or the like can be used. In addition, a resin such as acrylic on which aluminum is vapor-deposited can be used as the light reflecting material. As the translucent material, acrylic resin, resin such as polymethyl methacrylate, polycarbonate, polystyrene, polyethylene, polypropylene, or glass can be used. It should be noted that the above-described constituent materials may be materials that transmit sunlight, the phosphors 15 and 20, the ultraviolet lamp, or the light of the black light 5, even if they are not transparent.

  The base 40 has a cylindrical shape having a space inside, and an air inlet 401 and an air outlet 402 are opened on a side surface and an upper surface, respectively. A projecting portion 403 for fitting with the intake port 111 of the case 11 constituting the air purification unit 10 is provided on the periphery of the exhaust port 402. An introduction means 30 such as a fan for sending air from the intake port 401 to the air cleaning unit 10 through the exhaust port 402 is provided below the exhaust port 402.

  As the fan, a centrifugal fan such as a sirocco fan or a turbo fan, an axial fan such as a propeller fan, a cross-flow fan such as a cross flow fan, a circulation pump, or the like can be used. The fan only needs to be installed at a position where air flows through the purifying unit 12, and can be provided not only on the inlet side but also on the exhaust side.

  Further, the case 11 can be provided with a support base for fixing the fin 16, the phosphorescent body 20, or the light source 13. The support base can be formed separately from the fin 16, the phosphor 20, the light source 13, or the case 11, or can be formed together.

  Further, a pre-filter 50 for preliminarily filtering air before being introduced into the air cleaning unit 10 is supported at the exhaust port 402 by a support portion 404 provided at the inner peripheral edge of the exhaust port 402. Is provided.

Next, the operation will be described.
Since the fins 16 are combined with coiled metal wires 161 and 162 wound in different directions, the metal wires 161 and 162 are closely packed to form a contact portion 164, which has a high thermal conductivity. And heat dissipation performance is improved. Moreover, since the left-handed and right-handed metal wires 161 and 162 are intertwined, the shape of the fin 16 is stable, and the coil does not stretch due to strength or the like when the coil is continuously rolled.

Next, as shown in FIG. 2, the photocatalyst 14 is carried on the surface of the fin 16, and the irradiation light irradiates the wire diameter constituting the inner fin 16 from the direction 200, passes through the gap portion 163, Irradiate the wire diameter of the outer fin 163 and sequentially pass through the gap 163 to the back side. By the irradiation, the photocatalyst 14 is activated and holes and electrons are generated. The holes generate OH radicals (.OH) or the like in which adsorbed water is oxidized, while the electrons generate superoxide anions (.O ₂ ⁻ ) or the like in which adsorbed oxygen is reduced. Therefore, the harmful substances in the air are decomposed by the OH radicals or superoxide anions.

  Moreover, the air to be cleaned is blown along the flat surface 173 of the fin 16 so that the ventilation resistance is low. Therefore, the air to be purified can be efficiently purified by sending air or the like into the fins 16 using a fan or the like. Further, since the fins 16 have a large number of gaps 163, air is sufficiently passed in the direction from the center part toward the outer periphery or the direction from the outer periphery toward the center part even when the fins 16 are wound in a plurality of spirals. . Further, when the coil is formed in the spiral shape, the distance between the wire rods is wider on the outer peripheral side than on the inner peripheral side of the spiral, so that the resistance of air to be processed on the outer peripheral side becomes lower.

  The phosphorescent body 15 or phosphorescent body 20 is excited from the ground state upon absorption of light such as sunlight or a fluorescent lamp, and absorbs energy. Even after the stimulation is stopped, the energy absorbed when returning to the ground state is gradually emitted over a relatively long period as light. It can also be used repeatedly for a long time. Since the phosphors 15 and 20 emit light not only toward the inner periphery but also toward the outer periphery, the photocatalyst 14 is efficiently activated.

  Next, when the case 11 includes the light reflecting member 21, the light from the light source 13 is reflected, and light leakage to the outside of the air cleaning unit is reduced. In particular, a part of the light that has not been used for activation of the photocatalyst or phosphorescence of the phosphorescent material is reflected and irradiated again toward the photocatalyst 14 or phosphorescent materials 15 and 20. Thereby, the light of the light source 13 is utilized with high efficiency without waste. In addition, since the inner surface of the case 11 has a cylindrical shape, the light of the light source 13 is used more efficiently by the light reflecting member 21.

  Moreover, when using a light emitting diode for the light source 13, the air purification efficiency of the photocatalyst 14 can be made high using the heat which a light emitting diode emits. Furthermore, when a heater is incorporated in the air cleaner 1 and the temperature is adjusted, the temperature of the fins 16 rises uniformly, OH radicals generated from the photocatalyst 14 increase, and sterilization and antibacterial are efficiently performed.

  In the air purifier configured as described above, since the photocatalyst 14 is activated with high energy efficiency by the light of the phosphors 15 and 20, a good air purification can be achieved even when the light source 13 is not irradiated at night. Has characteristics. In addition, since the light source 13 repeatedly activates the phosphors 15 and 20 or the photocatalyst 14, it is possible to obtain an air cleaner having an air cleaning function for a long period of time.

  Next, Embodiment (2) of the air cleaner of this invention is demonstrated. As shown in FIG. 7, the fins 190 are spirally wound along the flat surface 163 to constitute the filter 220. Specifically, in the filter 220, the metal wires 161 and 162 are wound in a coil shape to form a winding unit, and the whole is continuously formed in a flat shape, and the winding units 165 and 166 are mutually connected in the width direction. The fin 165 is formed by spirally winding the fin 165 formed with the gap 163 and the contact portion 164 along the flat surface 163 so as to intersect with each other in the longitudinal direction.

  If the spiral pitch of the filter 220 is larger than the diameter 171 in the width direction of the flat coil, the overlapping portion of the filter 220 does not occur, and thus good air permeability can be obtained. Further, if the winding diameter of the filter 220 is larger than the diameter 171, the workability at the time of winding is good.

  Other configurations such as the case 11, the light source 13, the photocatalyst 14, and the phosphorescent material 15 at this time are the same as those in the embodiment (1).

  The filter 220 can also blow air so as to intersect the flat surface 163 of the fins 165 as shown in the direction 200 of FIG. In this case, the spiral pitch of the filter 220 can be appropriately increased.

  Next, Embodiment (3) of the air cleaner of this invention is demonstrated based on FIG. FIG. 8 is a longitudinal sectional view showing the configuration of the air cleaner of the present invention. As shown in FIG. 8, the air cleaner 1 of the present invention includes an air cleaning unit 10 for purifying air and a fan for introducing air into the air cleaning unit 10 as in the embodiment (1). The introduction means 30 is generally configured.

  The air cleaning unit 10 is placed on a base 40 having an upper opening, and the introduction means 30 is provided inside the base 40. The purifying means 12 is also used as a plurality of fins 16 arranged in parallel, fin holding members 17 and 18 for holding both ends of the plurality of fins 16, and a core material for supporting the fin holding members 17 and 18, respectively. And a functioning light source 13. The fin holding members 17 and 18 are respectively fitted into purification means holding portions 113 and 114 formed on the inner peripheral surface of the case 11 so that the purification means 13 and the case 11 are integrated. In addition, it is preferable that the fin holding members 17 and 18 have a mesh shape so that air can be sucked and discharged.

  Further, similarly to the embodiment (1), the metal wires 161 and 162 are wound in a coil shape on the fin 16 to form a winding unit, and the whole is continuously formed flat, and each winding unit 165 is formed. 166 and 166 intersect with each other in the width direction and the longitudinal direction, and a gap portion 163 and a contact portion 164 are formed. In addition, about other structures, such as the case 11, the light source 13, the photocatalyst 14, and the luminous material 15, it applies to Embodiment (1).

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to this Example.

(Example 1)
First, the air cleaner 100 was produced.
After combining a wire rod having a diameter of 1 mm carrying titanium dioxide as a photocatalyst on the surface with an outer diameter of 20 mm, a right-handed winding and a left-handed winding so that winding units are displaced from each other. A fin flattened by rolling was formed into a coil shape having an outer diameter of 60 mm, and a filter 61 was obtained. As shown in FIG. 9, around the black light 63, the five molded filters 61 were placed so that the distance between the filters 61 was about 20 mm. About 50 phosphorescent bodies 62 (N night light manufactured by Nemoto Special Chemical Co., Ltd., product number V-300M) having a volume of about 10 cm ³ were installed in the gap between the filter 61 and the black light 63 and the gap between the formed filter 61. Next, the filter 61, the phosphorescent body 62, and the black light 63 were installed in the case 60. The case 60 was used by placing a glass container having an internal volume of about 7 dm ³ vertically. Furthermore, in order to suppress the activation of the photocatalyst 11 by light from the outside, the outside of the case 60 was covered with an aluminum foil.

  Further, as shown in FIG. 9, a circulation pump is installed as a fan 70 in order to flow air into the case 60. Further, a detector tube 80 (Model 801 No. 92 manufactured by GASTEC) was attached to the case 60 in order to measure the concentration of acetaldehyde gas used as the sample gas. As shown by the arrow in FIG. 9, air enters the case 60 from the inlet 91 and exits from the outlet 92, and then the aldehyde concentration is measured by the detection tube 80. The air returns to the fan 70 and is closed. Air is circulated in the system.

  Using the air cleaner 100, an air cleaning test was performed. Acetaldehyde gas was used as the sample gas. The sample gas was injected into the case 60 with the black light 63 turned off. After the fan 70 was turned on, it was left for 30 minutes in order to keep the aldehyde concentration in the case 60 constant. Thereafter, an air cleaning test was conducted. First, the black light 63 was turned on for 10 minutes. Thereafter, the black light 63 was turned off, and an air cleaning test using the phosphorescent body 62 was performed for 30 minutes. Thereafter, the sample gas was introduced again and an air cleaning test was conducted for 50 minutes.

  The results of the above test are shown in FIG. In FIG. 10, the horizontal axis represents time (unit: minutes), and the vertical axis represents acetaldehyde concentration (unit: ppm). The acetaldehyde concentration decreased from 200 ppm to 80 ppm between 0 minutes and 30 minutes after the black light 63 was turned off. Further, after the sample gas was reinjected, the black light 63 remained OFF, and the acetaldehyde concentration decreased from 200 ppm to 80 ppm in 50 minutes to 40 minutes. Even after 50 minutes after the black light 63 was turned off, it was confirmed that the photocatalyst was activated by the phosphor 62 to have an energy efficient air cleaning function.

(Example 2)
After the test in Example 1, the phosphor 62 was taken out from the air cleaner 100, and the air clean test was performed with the black light 63 in the ON state as in the air clean test. The result is shown in FIG. The acetaldehyde concentration decreased from 150 ppm to 80 ppm in 20 minutes from 10 minutes to 30 minutes after the black light 63 was turned on. In Example 1, since the acetaldehyde concentration decreased from 150 ppm to 80 ppm in 20 minutes after 10 to 30 minutes after turning off the black light, the air cleaning effect by the black light and the air cleaning effect by the phosphor are equivalent. It was confirmed that there was.

The perspective view of the air cleaner which concerns on embodiment (1) End view of the filter Top view of filter Illustration for explaining fins Top view of filter Top view of fin 16 and phosphorescent body 20 according to embodiment (2) The perspective view of the fin 16a which concerns on embodiment (3) Sectional drawing of the air cleaner which concerns on embodiment (4) The perspective view of the air cleaner concerning Example 1. FIG. The graph which shows the result of Example 1 The graph which shows the result of Example 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air cleaner 2 Filter 10 Air purifying unit 11 Case 111 Inlet port 112 Exhaust port 113, 114 Purifying part holding member 12 Purifying part 13 Light source 14 Photocatalyst 15 Phosphorescent body 16 Fin 161, 162 Metal wire 163 Space | gap part 164 Contact part 165, 166 Winding unit 167,168 End 169 Diameter of metal wire 170 Winding unit 171 Diameter in width direction 172 Length of displacement in longitudinal direction 173 Flat surface 174 Length of displacement in width direction 180-183 Center of fin Site 190, 192 Circulation unit 17, 18 Fin holding member 20 Phosphorescent material 21 Light reflector 22 Filter 30 Introducing portion 40 Base 401 Inlet port 402 Exhaust port 403 Protruding portion 404 Supporting portion 50 Prefilter 60 Air purifying according to the first embodiment Machine case 61 Example 1 62 A phosphorescent body according to the first embodiment 63 A black light according to the first embodiment 70 A fan according to the first embodiment 80 A detection tube according to the first embodiment 91 An inlet port according to the first embodiment 92 An exhaust port 100 according to the first embodiment Example 1 air purifier

Claims (17)

  A metal wire carrying a photocatalyst on its surface is wound in a coil shape to form a winding unit and the whole is formed in a flat plane, and adjacent winding units are displaced from each other so that a gap portion and a contact portion are formed. A filter with fins having   The fin is combined from a right-handed coil-shaped right-winding unit and a left-handed coil-shaped left-winding unit, and the right-winding unit and the left-winding unit are displaced from each other and have a gap and a contact portion 2. The filter according to claim 1, wherein   The filter according to claim 1 or 2, wherein the fin is wound in a spiral shape along a flat surface.   The filter according to claim 1, wherein the fin is wound spirally along a flat surface.   The filter according to any one of claims 1 to 4, wherein the photocatalyst supported on the surface of the fin is supported by a binder mainly composed of diatomaceous earth or silicon dioxide.   6. The filter according to claim 1, wherein a phosphorescent material is carried on a surface of the fin.   The filter according to claim 1, wherein a phosphorescent material is disposed in the vicinity of the fin.   The filter according to claim 1, wherein the fin is made of aluminum or an aluminum alloy.   9. The filter according to claim 1, wherein the fin is aluminum or an aluminum alloy having an anodized layer, and a photocatalyst is supported on the surface or layer of the anodized layer.   An air cleaner comprising the filter according to claim 1.   The air cleaner according to claim 10, further comprising a light source for activating the photocatalyst.   The air cleaner according to claim 11, wherein the light source includes a phosphorescent body.   The air cleaner according to claim 11 or 12, further comprising a reflection member for light from the light source.   The air cleaner according to claim 10, wherein air is blown along a flat surface of the fin.   14. The air cleaner according to claim 10, wherein air is blown across the flat surface of the fin.   The air cleaner according to claim 12 or 13, wherein the phosphorescent body emits light having a wavelength of 250 nm to 450 nm, preferably 440 nm.   An air cleaning method using the air purifier according to claim 10.

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