JP2007105649A - Air cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cleaner which exerts a high cleaning efficiency, has excellent durability, and can be manufactured at a low cost as the air cleaner using a photocatalytic function of titanium dioxide. <P>SOLUTION: In a box 1 having an air suction opening 11 and an air delivery opening 12, a plurality of nonwoven cloths 2 holding titanium dioxide photocatalytic particles are stretched with a predetermined distance, and a plurality of LED lamps 3 radiating a ray exciting the photocatalyst and fans 4, 4 generating an inner air flow from the air suction opening 11 to the air delivery opening 12 are provided. A coating film 5 containing the titanium dioxide photocatalytic particles is formed on an inner wall surface 19a of the box 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air purifier that cleans inhaled outside air using a purification action of a titanium dioxide photocatalyst and discharges it to the outside.

In recent years, various purification actions by the photocatalytic function of titanium dioxide have attracted attention. When titanium dioxide is excited by light, it is generated from germicidal action against microorganisms such as bacteria, viruses and bacteria, decomposition action of dirt such as tobacco dust, and antiseptics, paints and adhesives used for building materials. It produces the action of decomposing VOC gases such as formaldehyde and xylene, the action of decomposing odorous components, the action of decomposing air pollutants such as NOx and SOx, etc. Various proposals have also been made for use in air purifiers (Patent Documents 1 to 5).
JP-A-8-121827 Japanese Patent Laid-Open No. 10-61986 JP-A-11-207149 JP 2001-96114 A JP 2003-310724 A

  However, these conventional air purifiers using photocatalysts are inadequate in terms of purification efficiency, have poor durability and are expensive to manufacture. Not done.

  In view of the above-described circumstances, the present invention aims to provide an air purifier that uses the photocatalytic function of titanium dioxide and that exhibits high purification efficiency and is excellent in durability and can be manufactured at low cost. .

  In order to achieve the above object, an air purifier according to claim 1 of the present invention is provided with a dioxide dioxide in a box 1 provided with an air inlet 11 and an air outlet 12, if indicated with reference numerals in the drawings. A plurality of breathable sheet materials (nonwoven fabric 2) holding titanium photocatalyst particles are stretched at predetermined intervals, and a plurality of LED lamps 3 for emitting light for exciting the photocatalyst, and the air suction Fans 4 and 4 that generate an internal air flow from the mouth 11 to the air discharge port 12 are installed, and a coating film 5 containing titanium dioxide photocatalyst particles is formed on the inner wall surface 19 a of the box 1. .

  According to a second aspect of the present invention, in the air cleaner of the first aspect, the breathable sheet material is made of a nonwoven fabric 2 and titanium dioxide photocatalyst particles are held between the fibers.

  According to a third aspect of the present invention, in the air cleaner of the first or second aspect, the breathable sheet material 2 is stretched on at least one side of a lattice-like support frame 6.

  According to a fourth aspect of the present invention, in the air purifier of the third aspect, the box 1 is provided with fitting portions (fitting grooves 7) for holding the support frames 6 in an upright state. .

  In the invention of claim 5, the plurality of breathable sheet materials 2 are arranged in parallel at predetermined intervals, and a plurality of the LED lamps 3 are arranged in parallel in the breathable sheet material 2. It is set as the structure formed so that the outer side may be enclosed.

  According to the invention of claim 1, as an air cleaner, titanium dioxide photocatalyst particles held on a plurality of breathable sheet members stretched in a box, and a coating film formed on the inner wall surface of the box In cooperation with the titanium dioxide photocatalyst particles contained, very high purification efficiency is exhibited, and since an LED lamp is used as the excitation light source of the photocatalyst, a normal discharge tube type ultraviolet lamp or fluorescent lamp can be used. Compared with the case of using, the pumping light source has a much longer life, the durability is improved as a whole, and the structure is simple and inexpensive to manufacture.

  According to invention of Claim 2, in the said air cleaner, since the said air permeable sheet material hold | maintains the titanium dioxide photocatalyst particle between the fibers of a nonwoven fabric, the contact opportunity of the air with respect to this particle | grain surface is large. Higher purification efficiency can be obtained, and photocatalyst particles can be easily held on the nonwoven fabric by spraying a titanium dioxide dispersion.

  According to the invention of claim 3, since the breathable sheet material is stretched on the lattice-like support frame, it is possible to prevent distortion and breakage such as bulging deformation of the breathable sheet material due to the ventilation pressure in the box. The air-permeable sheet material can be easily stretched.

  According to invention of Claim 4, in the air cleaner of the structure which stretches the said air permeable sheet material on a grid | lattice-like support frame, it becomes an upright state only by fitting this support frame to the fitting part of a box. Since it can hold | maintain, the workability | operativity at the time of assembling and manufacturing an air cleaner is improved significantly.

  According to the invention of claim 5, since a large number of LED lamps 3 are arranged so as to surround the outside of the parallel arrangement portion of the breathable sheet material, the irradiation efficiency of the excitation light to these breathable sheet materials is good. Moreover, the irradiation property of the excitation light to the inner wall surface of the box provided with the coating film containing titanium dioxide photocatalyst particles is good, so that the purification action by the photocatalyst is more efficiently exhibited.

  Hereinafter, one embodiment of an air cleaner concerning the present invention is described concretely with reference to drawings. FIG. 1 shows the overall appearance of the air cleaner, and FIG. 2 shows a cross section and a longitudinal section of the air cleaner.

  As shown in FIG. 1, this air purifier includes air suction ports 11 formed of a plurality of parallel vertical slits at the upper left and right sides of a rectangular box 1 that is thin in the front-rear direction, and is similarly provided at the upper left and right sides. The liquid crystal touch panel 8 is attached to a slightly upper part of the front surface. And the box 1 is comprised by the box main body 1a open | released below, and the bottom cover 1b fitted to the downward opening part and screwed.

  Further, in the interior 10 of the box 1, a plurality of vertically long rectangular frames (5 in the figure) made of stainless steel or aluminum having main surfaces along the front-rear direction are arranged at regular intervals in the left-right direction. And a downward-opening U-shaped lamp mounting frame 30 is screwed to the bottom lid 1b so as to surround the mounting portions of the holding frames 6. A pair of left and right fans 4, 4 with the air blowing direction downward are provided on the upper side of 30. A nonwoven fabric 2 holding titanium dioxide photocatalyst particles between fibers is stretched on one side of each holding frame 6, and a large number of photocatalyst excitation LED lamps 3 are arranged at predetermined intervals on the inner surface side of the lamp mounting frame 30. Attached to the table.

  As shown in FIGS. 3 and 4, each holding frame 6 includes a grid 6 a in which vertical and horizontal wires are welded at the crossing portion, and an edge frame material 6 b having a U-shaped cross section made of stainless steel or aluminum surrounding the four circumferences. In the state where the nonwoven fabric 2 is overlapped on one side of the lattice 6a, the peripheral part is sandwiched inside the edge frame member 6b, and is clamped and fixed between the both side pieces 61, 62 of the sandwiching member 6b. Yes.

  As shown in an enlarged view in FIG. 5, the peripheral wall of the box body 1a has a double wall structure of an outer plate 18 and an inner plate 19, and the inner wall surface 19a has titanium dioxide photocatalyst particles on the inner wall surface 19a. The coating film 5 to be contained is formed over the entire circumference.

  As shown in FIG. 6, the bottom lid 1 b of the box 1 is provided with a rectangular annular dam wall 13 that externally fits the lower portion of the box body 1 a on the upper surface side, and is formed on the front and rear wall portions 13 a and 13 b of the dam wall 13. The upper and lower fitting grooves 7 extending from the upper end to the inner surface side are formed at regular intervals in the left-right direction due to the notches in the constituent metal plate material. Thus, each holding frame 6 is held in an upright state in the box 1 by inserting front and rear edges into the fitting grooves 7 and 7 facing front and rear from above. In addition, each holding frame 6 is set so that the stretched side of the nonwoven fabric 2 faces the center side of the box 1 (however, in the case of an odd number of holding frames 6 as in the present embodiment, which one of the central portions is May be the direction).

  The bottom lid 1b has screw holes 15 and 15 for screwing the left and right lower ends of the lamp mounting frame 30 on the inner surface side of the central portion of the left and right walls 13c and 13c of the dam wall 13 and the weir. The flange portion 16 projecting outward from the lower edge of the wall 13 is provided with screw insertion holes 17 for screwing the flange portion 16 to the lower end surface of the box body 1a.

  Here, the means for retaining the titanium dioxide photocatalyst particles between the fibers of the nonwoven fabric 2 is not particularly limited, but a method of spraying a binder-free high-concentration titanium dioxide dispersion of 10% or more on the surface of the nonwoven fabric 2. According to this, a product capable of exhibiting a high purification ability can be obtained with good workability. Further, the means for forming the coating film 5 is not particularly limited, but a method of applying a paint containing a relatively low concentration of about 5% titanium dioxide and an inorganic binder to the inner wall surface 19a by spraying or brushing is suitable. is there. In addition, as a suitable commercial item of the former high concentration titanium dioxide dispersion liquid, the product name Blue Active EX-01 (a titanium dioxide concentration 15%, an isopropyl alcohol solvent contains a dispersing agent) made from Eco-Vice, and the latter inorganic type As a suitable commercial item of the coating material containing a binder, the brand name Blue Active EX-1 (a titanium dioxide density | concentration of 5%, an isopropyl alcohol-ethanol solvent contains a siloxane resin and a dispersing agent) by Eco vice company is mentioned, respectively.

Further, as the titanium dioxide photocatalyst particles to be held on the nonwoven fabric 2 and the coating film 5, those mainly composed of anatase type which has been conventionally known to have photocatalytic activity can be used. Responsive titanium dioxide (Patent Documents 6 and 7) is preferred.
Japanese Patent No. 3252136 Japanese Patent No. 3454817

  On the other hand, as the LED lamp 3 for photocatalyst excitation, any LED that emits light in a wavelength range that can excite the photocatalyst may be used. Depending on the photoresponsive characteristics of the titanium dioxide photocatalyst particles of the nonwoven fabric 2 and the coating film 5, an ultraviolet LED is used. , White LED, blue LED or the like may be selected as appropriate.

  In the air purifier having the above-described configuration, when the start button set on the screen of the liquid crystal touch panel 8 is touched, the LED lamps 3 are turned on and the fans 4 and 4 are driven. The air is sucked from the mouths 11 and 11, passes through the inside 10 of the box 1, and is discharged to the outside from the lower air discharge ports 12 and 12. Thus, in the inside 10 of the box 1, the titanium dioxide photocatalyst particles held on the nonwoven fabric 2 of each support frame 6 and the dioxide dioxide contained in the coating 5 on the inner wall surface 19 a of the box 1 by the light of the LED lamps 3. Since the titanium photocatalyst particles are both excited and activated, the air passing through the box 1 is strongly purified by the photocatalytic activity from the nonwoven fabric 2 side and the inner wall surface 19a side. Therefore, the air discharged from the air discharge ports 12 and 12 completely decomposes odor components and harmful gas components contained in the original outside air, and also surely kills microorganisms such as bacteria, viruses and sputum. Odorless and harmless purified air.

  In this air purifier, since the LED lamps 3 are used as the excitation light source of the photocatalyst, the excitation light source has a much longer life compared to the case of using a normal discharge tube type ultraviolet lamp or fluorescent lamp. As a result, the overall durability is excellent, and the structure including the mounting portion of the excitation light source and the electrical wiring is simplified, so that there is an advantage that it can be manufactured at low cost. In particular, in this embodiment, since a large number of LED lamps 3 are arranged so as to surround the outside of the parallel arrangement portions of the support frames 6..., The irradiation efficiency of the excitation light to the nonwoven fabric 2 of each support frame 6 is high. In addition, the irradiation property of the excitation light to the coating film 5 containing the titanium dioxide photocatalyst particles on the inner wall surface 19a of the box is improved, so that the purification action by the photocatalyst is more efficiently exhibited.

  Furthermore, in this embodiment, since the nonwoven fabric 2 is stretched around the lattice-like support frame 6, the nonwoven fabric 2 may be distorted or distorted by bulging deformation due to the ventilation pressure in the box 1. In addition, it is possible to easily prevent the nonwoven fabric 2 from being stretched, and the support frame 6 can be easily held upright simply by fitting the fitting frame 7 into the fitting groove 7 of the bottom lid 1b of the box 1. Workability when assembling and manufacturing the air cleaner is greatly improved.

  In the air cleaner of the present invention, the fitting portion for holding the support frames 6 in an upright state as described above is replaced with the fitting groove 7 as in the embodiment, on the bottom lid 1b of the box 1. Alternatively, various fitting structures can be employed, such as channel-shaped metal fittings facing the inner wall surface 19a at regular intervals so as to face each other on the groove side.

  Moreover, in the said embodiment, although the titanium dioxide photocatalyst particle is hold | maintained at the nonwoven fabric 2, you may hold | maintain this photocatalyst particle on other various air permeable sheet materials including a woven fabric in this invention. However, in the configuration in which the photocatalyst particles are held between the non-woven fibers, there is a great opportunity for air contact with the surface of the photocatalyst particles, so that a high purification efficiency can be obtained. There is an advantage that it can be easily held. Thus, the air-permeable sheet material such as the nonwoven fabric 2 holding the photocatalyst particles may be stretched on both surfaces of each support frame 6.

  In addition, in the present invention, the number and arrangement of the breathable sheet material (nonwoven fabric 2), the arrangement of the LED lamps 3 ..., the installation position and orientation of the fan 4, the shape and assembly structure of the box 1, the air inlet The detailed configuration such as the shape and position of the air outlet 11 and the air outlet 12 and the form and mounting position of the operation panel such as the liquid crystal touch panel 8 can be variously modified in addition to the embodiment.

It is a perspective view which shows the external appearance of the air cleaner which concerns on one Embodiment of this invention. The internal structure of the same air cleaner is shown, (A) is a transverse plan view, and (B) is a longitudinal front view. It is a front view of the holding frame which stretched the nonwoven fabric used for the air cleaner. FIG. 4 is a sectional view taken along line XX in FIG. 3. FIG. 3 is an enlarged view of a virtual line circle C in FIG. 2. It is a perspective view which shows attachment operation of the holding frame with respect to the bottom cover of the box in the air cleaner.

Explanation of symbols

1 Box 10 Inside 11 Air inlet 12 Air outlet 19a Inner wall 2 Non-woven fabric (breathable sheet material)
3 LED lamp 4 Fan 5 Paint film 6 Holding frame 7 Fitting groove (fitting part)

Claims (5)

  A plurality of breathable sheet materials holding titanium dioxide photocatalyst particles are stretched at predetermined intervals in a box having an air suction port and an air discharge port, and a plurality of radiating lights that excite the photocatalyst. An air cleaner comprising a plurality of LED lamps and a fan for generating an internal air flow from the air suction port to the air discharge port, and a coating film containing titanium dioxide photocatalyst particles formed on the inner wall surface of the box vessel.   The air cleaner according to claim 1, wherein the breathable sheet material is made of a nonwoven fabric, and titanium dioxide photocatalyst particles are held between the fibers.   The air purifier according to claim 1 or 2, wherein the breathable sheet material is stretched on at least one side of a lattice-shaped support frame.   The air cleaner according to claim 3, wherein the box is provided with a fitting portion that holds the support frame in an upright state. The plurality of breathable sheet materials are arranged in parallel at predetermined intervals, and a plurality of the LED lamps are arranged so as to surround the outside of the parallel arrangement portion of the breathable sheet material. The air cleaner in any one of -4.

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