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Photocatalyst deodorization device

A photocatalyst and photocatalytic technology, which is applied in deodorization, physical/chemical process catalyst, household refrigeration equipment, etc., can solve the problems of commercialization, corrosion, and illumination reduction, etc., achieve long life, reduce flow path resistance, Effect of reducing pressure loss

Active Publication Date: 2013-03-20
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In the case where ammonia is decomposed assuming the above-mentioned short wavelength (near ultraviolet region or UV light), not only the permeability of ammonia into the sealing resin (such as epoxy resin or silicone resin) is extremely high, but also The deterioration of the sealing resin due to the wavelength, or the direct corrosion of the LED chip (LED die) or the LED chip and the gold base electrode due to the penetration of the sealing resin, leads to a decrease in the illuminance of the LED, and there is a problem that it cannot be commercialized

Method used

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  • Photocatalyst deodorization device
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  • Photocatalyst deodorization device

Examples

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no. 1 Embodiment approach

[0064] The photocatalyst deodorization device 1 of one embodiment of the present invention is such as figure 1 Shown is a device installed in the cabinet of the refrigerator 100 for deodorization. In the cabinet of the refrigerator 100, the cooling fan 101 is used to circulate the cold air 102 in the cabinet at a low wind speed, for example, a wind speed of 0.2 m / sec to 3 m / sec. The photocatalyst deodorizing device 1 of the present embodiment is installed in the cold air passage 103 for use in order to deodorize the air in the box using a photocatalyst so as not to obstruct the flow of air at such a low wind speed.

[0065] like Figure 2 ~ Figure 4 As shown, the photocatalyst deodorizing device 1 of this embodiment is composed of LED3 for exciting the particles of the photocatalyst carried; an LED mounting substrate 5 provided with a plurality of ventilation holes 4 and mounted with LED3; A plurality of photocatalyst sheets 6; a facing substrate 7 provided with ventilation ...

no. 2 Embodiment approach

[0083] Next, a photocatalyst deodorizing device 1 according to a second embodiment of the present invention will be described. The photocatalyst deodorizing device 1 of the present embodiment is also as figure 1 Shown in FIG. 1 is a device installed in the cabinet of the refrigerator 100 for deodorization. In addition, the structure of this embodiment is the same as that of the first embodiment, such as Figure 2 ~ Figure 4 As shown, the LED3 used to excite the particles of the photocatalyst carried; the LED mounting substrate 5 provided with a plurality of ventilation holes 4 and LED3 installed; a plurality of photocatalyst sheets 6 arranged substantially parallel thereto; and The LED mounting substrate 5 faces and is arranged substantially parallel to the facing substrate 7 provided with the ventilation hole 4; and the housing 8 formed of a frame that maintains the position of these plates and maintains a reinforced shape.

[0084] In the case of this embodiment, the wavel...

Embodiment 1

[0092] Using the photocatalyst deodorizing device 1 of the first embodiment, the area of ​​the photocatalyst sheet used is 50 cm 2 , 1g of titanium oxide (80% of anatase type, 20% of rutile type) is supported on the photocatalyst, and the irradiation intensity of light generated by LED3 that emits ultraviolet rays is 2mW / cm 2 The photocatalyst deodorizing device 1 was tested for its deodorizing performance in a refrigerator with an initial concentration of 5 ppm of acetaldehyde. like Figure 9 As shown in the graph of , it was confirmed that the acetaldehyde decomposition performance of the photocatalyst deodorizer of Example 1 was about 10% higher than that of the photocatalyst deodorizer of the conventional example.

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Abstract

Disclosed is a long-life photocatalyst deodorization device (1) which effectively excites photocatalysts over the entire surface of a photocatalyst sheet and is capable of maintaining deodorization performance over a long period. Substrates (5 and 7) upon which vent holes (4) have been provided are disposed in parallel, and upon at least one substrate (5) of the two substrates, LEDs (3) are mounted. Between the two substrates, photocatalyst sheets (6) constituted by woven glass fiber material (6A) carrying photocatalyst particles (6B) and a frame (6C) supporting the material are disposed. The photocatalyst sheets and the two substrates are fixed to a housing (8), whereupon emitting surfaces of the LED light sources for exciting the photocatalysts and the photocatalyst sheets are disposed in parallel. Air fed from the vent holes is caused to pass through the photocatalyst sheets. The photocatalyst sheets are constituted by bundling glass fibers and weaving the fibers in a crisscross manner so as to have a predetermined aperture ratio such that ventilation is possible under low wind speed. The photocatalyst particles are mechanically held in contact between the glass fibers of the photocatalyst sheets.

Description

technical field [0001] The present invention relates to a photocatalyst deodorizing device for deodorizing by decomposing odorous components or organic gas molecules in the air using a photocatalyst. Background technique [0002] In recent years, there has been an increasing demand for improvements in air purification in so-called quasi-enclosed spaces such as living spaces and inside cars. In particular, it is expected to reduce ammonia generated from food or as sidestream smoke from cigarettes, and VOCs generated from building materials, etc. (Volatile organic substances. Such as acetaldehyde) etc. to remove the deodorization device. [0003] At present, such a deodorizing device adopts a photocatalyst deodorizing device in which an adsorbent that absorbs odor components is kneaded or loaded on a porous ceramic surface layer or an inorganic substrate, and a photocatalyst that decomposes the odor components. The catalyst material is formed in a honeycomb shape, and the air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L9/00A61L9/01A61L9/20B01D53/86B01J21/06B01J35/02B01J35/00
CPCB01D53/88B01D2257/90B01D2255/802B01J35/004B01J21/063A61L9/205B01D46/00F25D2317/0415F25D17/042B01J35/39
Inventor 新井田将须加崎和猪越良夫
Owner TOSHIBA LIGHTING & TECH CORP
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