JP4310873B2 - Air cleaner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air purifier that removes malodors and toxic gases, and more particularly to an air purifier that uses a photocatalyst.
[0002]
[Prior art]
Conventionally, for example, an air purifier as shown in the external view of FIG. 1 is used only for the purpose of collecting dust particles in the air as disclosed in Japanese Patent Laid-Open Nos. 4-26885 and 6-304427. It was manufactured to be additionally deodorized. However, such a conventional air cleaner has the following problems. One could not remove strong malodorous components in the air. In addition, there are a lot of airborne bacteria and various germs floating on the surface by splashing in the air, crushing, talking, etc., and adhering to dust, but these could hardly be removed. . In order to solve the above-described conventional problems, as shown in FIGS. 1 and 5, a dust collection filter 5 is provided in an air passage 4 connecting the suction port 2 and the discharge port 3 formed in the main body housing 1, and A deodorizing filter 6 using activated carbon and a blower 7 are provided, and a titanium oxide excited by the ultraviolet lamp 8 is held on the base material around the ultraviolet lamp 8 and the ultraviolet lamp 8 on the leeward side of the deodorizing filter 6. An air cleaner provided with a photocatalyst portion 9 composed of a mesh-like photocatalyst layer is invented. The dust collecting filter 5 can remove dust and smoke having relatively large particles, but has a characteristic that it cannot remove gaseous substances causing odors and substances having relatively small particles and high boiling points. In addition, the deodorizing filter 6 using activated carbon can remove a substance having a high polarity, a substance having a high boiling point, and a substance having a high concentration and a low polarity, but a substance having a low concentration and a substance having a low polarity and a substance having a low boiling point are removed. It has the characteristic that it cannot. Further, the photocatalyst layer has a characteristic that it easily adsorbs a substance having a low polarity or a substance having a low boiling point, and its performance deteriorates due to adhesion of a substance having a low polarity or a substance having a high boiling point. Therefore, in the above configuration, when dust, smoke, a high-concentration low-polarity substance, a high-polarity substance, or a high-concentration high-boiling substance passes, it is adsorbed by the dust collection filter 5 and the deodorization filter 6 using activated carbon. However, when the concentration of a substance having a low polarity, a substance having a high polarity, or a substance having a high boiling point is lowered, these substances are released from the deodorizing filter 6 using activated carbon, and are formed by a photocatalytic layer 9. Therefore, the performance of the photocatalyst layer deteriorates and the original deodorizing effect cannot be exhibited.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-described problems, to prevent performance degradation of the photocatalyst layer, and to provide an air purifier having high-performance deodorizing efficiency and high maintenance.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides an air purifier in which an air passage connecting a suction port and a discharge port formed in a main body housing is provided with a deodorizing filter and a blower, on the windward side of the deodorizing filter. A dust collection filter that collects dust, an ultraviolet lamp that has a mesh-like photocatalyst around the windward side of the dust collection filter, and covers the ultraviolet lamp by opening the leeward side to the windward side of the ultraviolet lamp. Rutotomoni provided a cover, made by providing a front panel formed with the suction port removably on the front of the main body casing, and an air purifier comprising integrally formed with the cover to the front panel.
[0005]
[0006]
[0007]
[0008]
[0009]
[0010]
[0011]
[0012]
DETAILED DESCRIPTION OF THE INVENTION
As described above, in the air cleaner of the present invention, the dust collection filter that collects dust on the windward side of the deodorizing filter, the ultraviolet lamp on the windward side of the dust collection filter, and a mesh-like pattern around the ultraviolet lamp. A dust sensor or gas sensor for detecting the amount of dust or gas on the windward side of the dust collecting filter, and a cover for covering the photocatalyst portion by opening the leeward side on the windward side of the photocatalyst unit On the other hand, a control unit for controlling the rotation speed of the blower by a detection signal output from the dust sensor or gas sensor is provided, and when the amount of dust or gas is large, the air volume is increased, and when the dust or gas is small, the air volume is decreased. Since there is a lot of dust or gas, the diffusion of malodorous molecules is prevented to prevent it from reaching the photocatalyst part, and the activated carbon filter is used to efficiently deodorize the dust or gas. If less is allowed to reach to promote the diffusion of malodorous molecules to photocatalyst section can be efficiently deodorized.
[0013]
Hereinafter, an air cleaner according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an external view of an air cleaner according to the present invention, FIG. 2 is a cross-sectional view of an essential part showing an embodiment of an air cleaner according to the present invention, and FIGS. 3 and 4 are other embodiments of the air cleaner according to the present invention. It is a principal part enlarged view which shows an example. As shown in FIGS. 1 and 2, a dust collecting filter 5, a deodorizing filter 6 using activated carbon, and a blower 7 are provided in an air passage 4 connecting the suction port 2 and the discharge port 3 formed in the main body housing 1. A photocatalyst portion comprising a mesh-like photocatalyst layer provided on the windward side of the dust collecting filter 5 and surrounding the ultraviolet lamp 8 and a titanium oxide excited by the ultraviolet lamp 8 on a substrate. 9 are arranged. A bell mouth 7 a is formed on the windward side of the blower 7. A U-shaped cover 10 is provided on the windward side of the photocatalyst portion 9 to open the leeward side and cover the photocatalyst portion 9. The inner surface of the cover 10 is a mirror surface that reflects light from the ultraviolet lamp 8. Further, the suction port 2 may be provided with a prefilter 5a for collecting dust with large particles. A dust sensor 12 for detecting the amount of dust or a gas sensor 13 for detecting gas is provided on the windward side of the dust collection filter 5, while a detection signal output from the dust sensor 12 or the gas sensor 13 is used to detect the dust of the blower 7. A control unit 14 for controlling the rotational speed is provided so that the air volume is increased when the amount of dust is large, and the air volume is decreased when the amount of dust is small. Further, the cover 10 may be formed in a semi-cylindrical shape as shown in FIG. 3 so that the reflected light is concentrated on the photocatalyst portion 9.
[0014]
Further, as shown in FIG. 4, a front panel 11 having the suction port 2 is detachably provided on the front surface of the main body housing 1, and the cover 10 is integrally formed on the front panel 11, thereby the photocatalyst. When cleaning the portion 9, the front panel 11 is removed so that the cover 10 covering the photocatalyst portion 9 can be easily withdrawn.
[0015]
Next, the operation of the above configuration will be described. Now, when dirty indoor air is taken in from the suction port 2, the concentration is first detected by the dust sensor 12 or the gas sensor 13, and when the concentration is high by the control unit 14, the blower 7 is rotated. When the air volume is increased to increase the air volume and the concentration is low, the rotation of the blower 7 is increased to control the air volume to be decreased. Since the control is performed as described above, when the concentration of dust or gas is large, the amount of air that is ventilated through the cover 10 increases, and these dust and gas are not diffused into the photocatalyst portion 9 in the cover 10 and are collected as it is. Dust is collected by reaching the filter 5, and the high-concentration gas that has passed through this reaches the deodorizing filter 6 using activated carbon and is adsorbed, and clean air is returned from the discharge port 3 to the room. Further, when the concentration of dust or gas is small, the amount of air passed through the cover 10 is reduced, the gas is diffused to the photocatalyst unit 9 covered with the cover 10, is deodorized by the photocatalyst unit 9, and the dust is collected. It is collected and cleaned by the dust filter 5, and this clean air is returned from the discharge port 3 to the room.
[0016]
As understood from the above description, for example, when the indoor air is contaminated with tobacco smoke or the like, the rotation of the blower 7 is increased to increase the air volume, so that the particulate component such as tobacco dust is covered with the cover 10. In addition, since the dust is collected by the dust collecting filter 5 without being diffused into the photocatalyst part 9, the photocatalyst part 9 can be prevented from being stained. When dust, smoke, and malodorous components in the air are reduced, the amount of air that is passed through the cover 10 is reduced, and the gas that is the malodorous component is diffused into the photocatalyst portion 9 covered with the cover 10, Deodorization is efficiently performed at the section 9.
[0017]
That is, the present invention increases the deodorization efficiency by paying attention to the fact that the deodorization efficiency by activated carbon decreases and the deodorization efficiency by the photocatalyst layer increases when there is relatively little air pollution, and the gas diffusion changes depending on the air volume. This makes it possible to extend the life of the photocatalyst portion.
[0018]
【The invention's effect】
As described above, according to the air cleaner of the present invention, the dust collecting filter that collects dust on the windward side of the deodorizing filter, the ultraviolet lamp on the windward side of the dust collecting filter, and the mesh around the ultraviolet lamp. A dust-shaped photocatalyst portion, a cover for covering the photocatalyst portion by opening the leeward side on the windward side of the photocatalyst portion, and a dust sensor for detecting the amount of dust or gas on the windward side of the dust collecting filter Or, while providing a gas sensor, provide a control unit that controls the rotation speed of the blower based on the detection signal output from the dust sensor or gas sensor.If there is a lot of dust or gas, increase the air volume, and if the dust or gas is low Since the air volume is reduced, when there is a lot of dust or gas, the diffusion of malodorous molecules is prevented to prevent reaching the photocatalyst, and the activated carbon filter is used to efficiently deodorize the dust. Can is to be allowed to reach when a small gas is to promote the diffusion of malodorous molecules to the photocatalyst section, deodorization efficiently.
[Brief description of the drawings]
FIG. 1 is an external perspective view of an air cleaner according to the present invention.
FIG. 2 is a cross-sectional view of an essential part showing an embodiment of an air cleaner according to the present invention.
FIG. 3 is an enlarged view of a main part showing another embodiment of the air purifier according to the present invention.
FIG. 4 is an enlarged view of a main part showing another embodiment of the air cleaner according to the present invention.
FIG. 5 is a cross-sectional view of a main part showing a conventional air cleaner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Suction port 3 Discharge port 4 Air passage 5 Dust collection filter 5a Pre filter 6 Deodorizing filter 7 Blower 8 Ultraviolet lamp 9 Photocatalyst part 10 Cover 11 Front panel 12 Dust sensor 13 Gas sensor 14 Control part

Claims (1)

In an air cleaner comprising a deodorizing filter and a blower provided in an air passage connecting a suction port and a discharge port formed in a main body housing, the same as a dust collecting filter for collecting dust on the windward side of the deodorizing filter, An ultraviolet lamp provided with a mesh-like photocatalyst part around the windward side of the dust collecting filter, and a cover that covers the ultraviolet lamp by opening the leeward side on the windward side of the ultraviolet lamp,
An air cleaner comprising: a front panel having the suction port formed detachably on a front surface of the main body housing; and the cover integrally formed with the front panel.

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