JP3838117B2 - air purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air purifier equipped with a photocatalyst carrying deodorizing filter.
[0002]
[Prior art]
Conventionally, an air purifier having a filter carrying a photocatalyst (hereinafter referred to as a photocatalyst carrying deodorizing filter) as a deodorizing filter for decomposing and removing dirt substances has been used in order to activate the photocatalyst. A light source that emits light) (hereinafter simply referred to as a light source) and a circuit that drives the light source (hereinafter simply referred to as a drive circuit). By the way, the electromagnetic noise emitted from the light source may propagate to a radio or television outside the air cleaner to cause adverse effects such as worsening sound and video. In order to prevent the electromagnetic wave noise from leaking outside, a method of arranging a metal body 5 so as to surround the light source 1 as shown in FIG. 1 is known.
[0003]
However, since a part of the light to be irradiated to the photocatalyst carrying deodorizing filter 2 is blocked by the metal body 5, there is a problem that the photocatalyst of the filter 2 cannot be activated sufficiently.
[0004]
[Problems to be solved by the invention]
In view of the above problems, an object of the present invention is to provide an air purifier that does not leak electromagnetic noise from a light source to the outside while ensuring a light irradiation amount for a photocatalyst-supported deodorizing filter.
[0005]
[Means for Solving the Problems]
According to the air cleaner according to claim 1 of the present invention, a photocatalyst-supported deodorizing filter, a light source that emits light toward the photocatalyst-supported deodorizing filter to activate the photocatalyst-supported deodorizing filter, and a drive circuit that drives the light source And an air purifier including a metal body that is grounded to remove electromagnetic noise generated from the light source, the metal body has a closed structure that surrounds the photocatalyst-supported deodorizing filter, the light source, and the drive circuit. Thereby, the light emitted from the light source is directly applied to the photocatalyst carrying deodorizing filter, thereby ensuring the light irradiation amount to the photocatalyst carrying deodorizing filter, and the electromagnetic wave noise emitted from the light source is grounded. Since it cannot pass through a metal body, electromagnetic noise does not leak outside the air cleaner.
[0006]
According to the air cleaner which concerns on Claim 2, in the air cleaner which concerns on Claim 1, a light source has a light irradiation part, and the light irradiation part and the metal body are contacting. Thereby, the heat generated in the light irradiation part of the light source is released to the outside of the metal body through the metal body, and there is a further effect of extending the life of the light source.
[0007]
According to the air cleaner which concerns on Claim 3, in the air cleaner which concerns on Claim 1 or 2, the drive circuit and the metal body are contacting. As a result, the heat generated in the drive circuit is released to the outside of the metal body through the metal body, and there is a further effect of extending the life of the drive circuit.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. First, a first embodiment of the present invention will be described. FIG. 2 is a sectional view of the air cleaner according to the first embodiment of the present invention, and FIG. 3 is an exploded perspective view of the air cleaner according to the first embodiment of the present invention. 2 and 3, 1 is a mercury lamp as a light source, 2 is a photocatalyst carrying deodorizing filter carrying a photocatalyst made of titanium oxide, 3 is a dust removing filter, 4 is a housing for housing a light source driving circuit for driving the light source, 5 is a metal body, 6 is a power connector, 7 is a blower fan, 8 is an air passage, and 10 is an air cleaner.
[0009]
First, the configuration of the air cleaner 10 will be described. Inside the air purifier 10, an air passage 8 extends from the inlet 11 to the outlet 12. Inside the air passage 8, a blower fan 7, a dust removing filter 3, a mercury lamp 1, and a photocatalyst carrying deodorizing filter 2 are disposed from the upstream. In this embodiment, the dust removing filter 3, the mercury lamp 1 and the photocatalyst carrying deodorizing filter 2 are housed in a metal case 5.
[0010]
The configuration of the metal case 5 will be described. The metal case 5 is made of, for example, steel or stainless steel, and includes a first side member 5a, a second side member 5b, a third side member 5c, and a fourth side member 5d as shown in FIG. Has been. The first side member 5a is an L-shaped plate member that constitutes one side portion of the air passage and the upper portion of the air passage, and the second side member 5b is the other side portion of the air passage and the lower portion of the air passage. Configure. The 3rd side member 5c comprises the rear side part corresponding to the downstream opening part of an air path, and is mesh shape in order to flow air. The 4th side member 5d comprises the front side part corresponding to the upstream opening part of an air path, and is mesh shape in order to flow air. By assembling these side members 5a, 5b, 5c and 5d, a metal case 5 having a rectangular parallelepiped closed structure is obtained. Further, since the metal case 5 is grounded, electromagnetic noise generated inside the metal case 5 does not propagate to the outside through the metal case 5.
[0011]
Inside the metal case 5, the mercury lamp 1 and the photocatalyst-supported deodorizing filter 2 are arranged adjacent to and parallel to each other in order to efficiently irradiate the filter 2 with the light from the mercury lamp 1. A housing 4 is disposed adjacent to the air passage 8, and a light source driving circuit 6 for driving the mercury lamp 1 is accommodated in the housing 4. Further, as shown in FIG. 3, a power connector 9 connected to the drive circuit 6 is passed through a hole provided in the housing 4 so that electricity is sent to the mercury lamp 1 from the outside of the air cleaner. It protrudes.
[0012]
With such a configuration, there is nothing between the light source and the photocatalyst-supported deodorization filter, so light emitted from the light source is irradiated to the photocatalyst-supported deodorization filter without being blocked, so that the photocatalyst is fully activated. And electromagnetic wave noise from the light source can be prevented from leaking into the metal case, that is, outside the air cleaner.
[0013]
In addition, by bringing the irradiated portion of the mercury lamp 1 into contact with the metal case 5, it is possible to release heat generated by the mercury lamp 1 to the outside through the metal case 5 and promote the heat radiation effect of the mercury lamp 1. . Thereby, the further effect of extending the lifetime of the mercury lamp 1 is produced. In this case, as shown in FIG. 2, the irradiation part of the mercury lamp 1 has a planar configuration, and the entire planar irradiation part is brought into contact with the metal member 5e connected to the metal case 5 to make a large contact. It is also possible to increase the heat dissipation effect by obtaining the area.
[0014]
It is also possible to release the heat generated in the optical drive circuit 6 through the metal case 5 to the outside. Thereby, the further effect of extending the lifetime of the optical drive circuit 6 is produced. In the case where the mercury lamp 1 or the optical drive circuit 6 and the metal case 5 are brought into contact with each other, it is preferable to insert an insulator such as an insulating sheet in order to ensure electrical insulation between them.
[0015]
Next, a second embodiment will be described. FIG. 4 is a sectional view of an air cleaner according to a second embodiment of the present invention. In the first embodiment, the dust filter 3 is disposed inside the metal case 5, but the dust filter 3 may be disposed outside the metal case 5.
[0016]
Next, a third embodiment will be described. FIG. 5 is a sectional view of an air cleaner according to a third embodiment of the present invention. In the first embodiment and the second embodiment, the mercury lamp 1 is disposed across the air passage 8 in the entire transverse direction, but in order to reduce the ventilation resistance of the air passage 8, the length of the mercury lamp in the longitudinal direction is shortened. By doing so, the cross-sectional area of the air passage 8 can be enlarged, and the ventilation resistance of an air cleaner can be reduced. Naturally, as a fourth embodiment, the present invention can be applied to a configuration in which the dust removal filter 3 is disposed outside the metal case 5 as shown in FIG.
[0017]
Although the mercury lamp has been described as an example of the light source, various lamps such as a cold cathode tube, a black light, a xenon tube, and a white light can be used in addition to the mercury lamp. The photocatalyst in the photocatalyst-carrying filter may be a metal oxide such as zinc oxide, tungsten trioxide, or cerium oxide.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a conventional photocatalyst-supported deodorizing filter.
FIG. 2 is a cross-sectional view of the air cleaner according to the first embodiment of the present invention.
FIG. 3 is an exploded perspective view of the air cleaner according to the first embodiment of the present invention.
FIG. 4 is a sectional view of an air cleaner according to a second embodiment of the present invention.
FIG. 5 is a sectional view of an air cleaner according to a third embodiment of the present invention.
FIG. 6 is a sectional view of an air cleaner according to a fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Light source 2 ... Photocatalyst carrying deodorizing filter 5 ... Metal body 6 ... Light source drive circuit 10 ... Air cleaner

Claims (3)

A photocatalyst-supported deodorizing filter;
A light source that emits light toward the photocatalyst-carrying deodorizing filter to activate the photocatalyst-carrying deodorizing filter;
A drive circuit for driving the light source;
In an air cleaner comprising a metal body that is grounded in order to remove electromagnetic noise emitted from the light source,
The air cleaner according to claim 1, wherein the metal body has a closed structure surrounding the photocatalyst carrying deodorizing filter, the light source, and the drive circuit. The air cleaner according to claim 1, wherein the light source includes a light irradiation unit, and the light irradiation unit and the metal body are in contact with each other. The air cleaner according to claim 1, wherein the drive circuit and the metal body are in contact with each other.

Images