JPH0445720Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an air purification device.

[Background of the idea]

Generally, the atmosphere contains odorous substances such as dust, cigarette smoke, various bacteria or microorganisms, and odorous gases.
Other substances are contained in the air, and it is required to purify the air as appropriate to create a comfortable environment or from the viewpoint of environmental hygiene.

[The problem that the idea aims to solve]

In order to purify the air, it is effective to irradiate the air with ultraviolet rays. For example, irradiating the air with ultraviolet rays with a wavelength of 2537 Å emitted from an ultraviolet radiation lamp such as a mercury discharge lamp has an effective bactericidal effect. When irradiated with 1849 Å ultraviolet rays, ozone is generated in the air, which has a deodorizing effect. Therefore, ultraviolet light with wavelength 2537 Å and wavelength 1849
If you use an ultraviolet radiation lamp, which is made by enclosing a luminescent gas that emits both types of ultraviolet rays in a glass envelope that transmits both types of ultraviolet rays with high efficiency, it will have both sterilizing and deodorizing effects at the same time. It is possible to obtain.

However, as mentioned above, it is actually very difficult to achieve both bactericidal and deodorizing effects in a well-balanced manner using an ultraviolet radiation lamp that emits both ultraviolet rays with a wavelength of 2537 Å and ultraviolet rays with a wavelength of 1849 Å. . In other words, in such an ultraviolet radiation lamp, the wavelength must be adjusted to obtain the necessary bactericidal effect.
When the amount of UV radiation with a wavelength of 2537 Å is increased, the amount of UV radiation with a wavelength of 1849 Å is also increased, resulting in an excessive amount of ozone being generated. There is a problem with the result.

On the other hand, in ultraviolet radiation lamps that emit only a small amount of ultraviolet light with a wavelength of 1849 Å, and the amount of ozone generated is controlled to the extent that a suitable deodorizing effect is exerted, at the same time
Since the amount of 2537 Å ultraviolet radiation is also reduced, the required bactericidal effect cannot be obtained.

The wavelength can be adjusted by adjusting the type and amount of luminescent gas sealed in the envelope of the ultraviolet radiation lamp.
In practice, it is extremely difficult to individually control the amount of radiation of ultraviolet rays with a wavelength of 2537 Å and ultraviolet rays with a wavelength of 1849 Å, as other problems arise, such as a significant decrease in efficiency as a lamp.

[Purpose of invention]

This invention solves the above problems and
The purpose of the present invention is to provide an air purification device that can suitably and well-balance the sterilizing effect of ultraviolet rays with a wavelength of 2537 Å and the deodorizing effect of ultraviolet rays with a wavelength of 1849 Å.

[Means to solve the problem]

The air purification device of the present invention includes: a casing having an air inlet and an air outlet; a ventilation fan that takes external air into the casing from the air inlet and causes it to flow toward the air outlet; an ultraviolet radiation lamp disposed within the casing that irradiates ultraviolet rays to the air flowing through the air flow passage in the casing, the ultraviolet radiation lamp emits ultraviolet rays with a wavelength of 2537 Å and ultraviolet rays with a wavelength of 1849 Å. A luminescent gas that transmits these ultraviolet rays is sealed in a glass enclosure that transmits those ultraviolet rays with high efficiency, and a part of the surface of the enclosure contains ozone-generating ultraviolet rays that transmit ultraviolet rays with a wavelength of 2537 Å but do not transmit ultraviolet rays with a wavelength of 1849 Å. It is characterized by being provided with a barrier coating.

[Function and effect of the idea]

According to the present invention, the outside air introduced by the ventilation fan is irradiated with ultraviolet light from the ultraviolet radiation lamp as it passes through the casing;
From the part of this ultraviolet radiation lamp where the ozone-generating ultraviolet ray blocking coating is provided, ultraviolet rays with a wavelength of 2537 Å are emitted, but ultraviolet rays with a wavelength of 1849 Å are not emitted. Therefore, the area where this ozone generating ultraviolet ray blocking coating is provided is adjusted. By doing this, the wavelength 1849
It is possible to irradiate the air with a sufficient amount of ultraviolet rays at a wavelength of 2537 Å without producing excess ozone, and as a result , it is possible to obtain both bactericidal action and deodorizing action suitably and in a well-balanced manner.

[Specific structure of the idea]

Hereinafter, the specific configuration of the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory vertical side view schematically showing an example of an air purifying device according to the present invention. The air purifying device according to this embodiment is of a type that is used by being placed, for example, on a table or other horizontal surface indoors, and has a flat box-shaped casing 1 as a whole. An air inlet 2 is formed, for example, by a louver, on the upper surface of one end of the casing 1, and an air outlet 3 is similarly formed by a louver on the upper surface of the other end. A ventilation fan 5 made of a cross flow fan is arranged so as to be located at. Further, an ultraviolet radiation lamp L that irradiates ultraviolet rays to the air flowing through the air flow passage in the casing 1 is disposed so as to extend, for example, along the direction of air flow.

As shown in FIGS. 2 and 3, for example, the ultraviolet radiation lamp L includes a glass enclosure A that has a rod-like shape and transmits both ultraviolet rays with a wavelength of 2537 Å and ultraviolet rays with a wavelength of 1849 Å with high efficiency. A luminescent gas that emits both ultraviolet light with a wavelength of 2537 Å and ultraviolet light with a wavelength of 1849 Å is sealed inside. This ultraviolet radiation lamp L has a wavelength range on a part of the outer circumferential surface of the envelope A other than the transmitting region T extending in a strip shape in the length direction.
An ozone-generating ultraviolet blocking coating F that transmits ultraviolet rays with a wavelength of 2537 Å but does not transmit ultraviolet rays with a wavelength of 1849 Å is provided. This ozone-generating ultraviolet ray blocking coating F
is made of, for example, titanium oxide, and the method of forming it is not particularly limited, but for example, with a cover material covering the transmission area T provided on the outer surface of the envelope A, an ozone-generating ultraviolet ray blocking coating is formed. It can be suitably formed by a method of applying a coating liquid for forming the cover material, drying it, and then removing the cover material.

Reference numerals 10 and 10 are sockets for holding the ultraviolet radiation lamp L, and 11 is a reflecting plate.

In the above, as the ultraviolet radiation lamp L,
For example, a low-pressure mercury lamp can be preferably used, and the material of the envelope A is quartz glass.

According to the configuration described above, by driving the ventilation fan 5, external air at the location where the air purifying device is arranged is introduced into the casing 1 from the air inlet 2, and this air is introduced into the casing 1 through the air inlet 2. The ultraviolet rays emitted from the ultraviolet radiation lamp L are irradiated onto the air at this time.

However, since the ozone-generating ultraviolet ray blocking coating F is provided on a part of the outer peripheral surface of the envelope A of this ultraviolet radiation lamp L, ultraviolet rays with a wavelength of 2537 Å are emitted from the ultraviolet radiation lamp L; wavelength
The 1849 Å ultraviolet rays are not emitted from areas other than the transmission region T, and therefore the amount of 1849 Å wavelength ultraviolet rays can be reduced without affecting the 2537 Å wavelength ultraviolet rays. Moreover, the degree of reduction in the amount of radiation corresponds to the outer surface area of the envelope A other than the transmission area T, that is, the area of the area where the ozone-generating ultraviolet ray blocking coating F is provided, so by adjusting the size of this area, , easy to control. For example, in the case of the above embodiment, the central angle θ of the area where the ozone-generating ultraviolet ray blocking coating F is provided
All you have to do is adjust the size of .

Since the amount of ultraviolet light with a wavelength of 1849 Å transmitted is reduced in this way, the amount of ozone generated is reduced, and it is easy to control the degree, so it is possible to generate enough ozone for the necessary amount and still have excess ozone. The generation of ozone can be prevented. As a result, it is possible to suitably obtain the deodorizing effect of ultraviolet rays with a wavelength of 1849 Å while obtaining a sufficient bactericidal effect with ultraviolet rays with a wavelength of 2537 Å, and it is also possible to reliably prevent the harmful effects of excessive ozone.

As described above, according to the air purification device of the present invention,
The air taken in from the outside can be irradiated with a sufficient amount of ultraviolet rays with a wavelength of 2537 Å and a controlled amount of ultraviolet rays with a wavelength of 1849 Å. Since a sufficient deodorizing effect can be reliably obtained in a well-balanced manner, and no special conditions are required for the UV radiation lamp, a highly efficient UV radiation lamp can be used.

[Brief explanation of the drawing]

FIG. 1 is an explanatory vertical cross-sectional side view showing one embodiment of an air purifying device according to the present invention, and FIGS. 2 and 3 are explanatory perspective views and enlarged views showing an example of an ultraviolet radiation lamp used in the present invention, respectively. FIG. 1...Casing, 2...Air inlet, 3...
Air outlet, 5... Ventilation fan, L... Ultraviolet radiation lamp, A... Enclosure, T... Transmission area, F...
Ozone generating ultraviolet ray blocking coating, 10...socket,
11...Reflector.

Claims (1)

[Claims for Utility Model Registration] A casing having an air inlet and an air outlet; a ventilation fan that takes outside air into the casing from the air inlet and causes it to flow toward the air outlet; an ultraviolet radiation lamp disposed within the casing that irradiates ultraviolet rays to the air flowing through the air flow passage in the casing, the ultraviolet radiation lamp emits ultraviolet rays with a wavelength of 2537 Å and ultraviolet rays with a wavelength of 1849 Å. A luminescent gas that transmits these ultraviolet rays is sealed in a glass enclosure that transmits those ultraviolet rays with high efficiency, and a part of the surface of the enclosure contains ozone-generating ultraviolet rays that transmit ultraviolet rays with a wavelength of 2537 Å but do not transmit ultraviolet rays with a wavelength of 1849 Å. An air purification device characterized by being provided with a barrier coating.