JP7446962B2 - UV cut filter - Google Patents

Description

The invention of the present application is installed in an air purifier that kills bacteria and viruses in the air sucked into the container by irradiating ultraviolet rays (UV-C) called germicidal radiation with a wavelength of around 253 nanometers. This relates to an ultraviolet cut filter that allows air to pass through while preventing ultraviolet (UV-C) leakage to the outside.

Harmful bacteria and viruses that cause illnesses such as colds and influenza are floating in the air.
People can inhale these bacteria and viruses when they breathe and become sick. The risk of developing the disease is particularly high if you are in a closed space, such as indoors or in a car, with a carrier.
One way to kill bacteria and viruses in the indoor air is to inhale the indoor air into an air purifier, and sterilize the air taken into the device with a wavelength of around 253 nanometers, which has a high bactericidal effect. It irradiates ultraviolet rays (hereinafter referred to as ultraviolet rays (UV-C)) classified into UV-C, which includes ultraviolet rays called rays, to kill bacteria and viruses, and exhaust the purified air outside the device. There are ways to purify indoor air.
However, with this method, if ultraviolet rays (UV-C) leak outside the device and hit the skin or look directly at the leaked ultraviolet rays, there is a risk of skin irritation or eye damage. be.

Japanese Unexamined Patent Publication No. 2016-32620 (Patent Document 1) describes an air purifier that prevents leakage of ultraviolet rays (UV-C) to the outside of the device and eliminates the above-mentioned dangers.
In this air purifier, air is sucked in from one end of the box into a box equipped with an ultraviolet lamp inside, and the box is irradiated with ultraviolet rays (UV-C) to remove particles contained in the air. Bacteria and viruses are killed and purified air is exhausted from the other end of the box.
In order to prevent ultraviolet rays (UV-C) from leaking outside the device, the air purifier should be placed on the downstream side of the air inlet (intake port) and upstream of the air outlet (exhaust port, air outlet). In addition, multiple light shielding plates (screen plates) are installed at intervals, which blocks ultraviolet rays (UV-C) and prevents them from leaking outside the device. This allows air to pass through the space between the two.

However, in the air purifier described in this document, multiple light shielding plates are required in order to ensure a passage for air to pass through while preventing leakage of ultraviolet rays, and there is a gap between the light shielding plates and the light shielding plates. In addition, the notches (parts that allow air to pass through) of the light-shielding plates must be arranged so that they are staggered, and the light-shielding plates must be arranged in at least two rows, and with care, three rows. Therefore, a space is required for this purpose, which increases the size of the device.
Additionally, means such as painting to prevent ultraviolet rays (UV-C) from being reflected on the surface of the light shielding plate are required, which increases costs accordingly.

Furthermore, various types of ultraviolet cut filters have been proposed as a method of blocking ultraviolet rays or avoiding irradiation of the human body with them.
For example, as described in JP-A No. 2013-253361 (Patent Document 2), an ultraviolet cut coat is deposited on the surface of a glass plate by a vapor deposition method, or as described in JP-A-2008-34350 (Patent Document 3). ), a typical method for manufacturing UV cut filters is to apply a UV cut material made of fine zinc oxide particles doped with indium to the surface of glass to form a UV cut film. However, the ultraviolet cut filter manufactured in this way is not only expensive to manufacture, but also completely different from the invention of the present application in that it cannot allow air to pass through. It is not suitable for installation in a container.

JP2016-32620A JP2013-253361A Japanese Patent Application Publication No. 2008-34350

The invention of the present application solves the above-mentioned problems of conventional air purifiers and ultraviolet cut filters, and can be installed in air purifiers, allowing outside air to be sucked into the device and It is compact and has a simple structure that allows air to pass through so that it can be discharged to the outside, and also blocks harmful ultraviolet rays (UV-C) and prevents it from leaking outside the device. Our goal is to provide an inexpensive ultraviolet cut filter.

The above-mentioned problems are solved by the following inventions described in each claim of the present application.
That is, the invention described in claim 1 inhales outside air into a container, and kills bacteria and viruses in the inhaled air by irradiating ultraviolet rays (UV-C) in the container. , an ultraviolet cut filter installed in an air purifier that discharges purified air outside the device, in which meshes are attached to openings at opposite ends of a polygonal box-shaped or circular cylindrical filter box. A plurality of spherical or polyhedral beads are stacked and filled in a plurality of layers inside the filter box, and the plurality of beads are soda glass beads made of soda glass and ceramics. It is composed of a combination of two or three types of balls selected from three types of balls: ceramic balls and metal balls, and has a passageway for sucking outside air into the vessel, It is installed in a passage for discharging purified air to the outside of the vessel, and allows air to pass through the passage while preventing harmful ultraviolet rays (UV-C) from leaking outside the vessel. This is an ultraviolet cut filter that is characterized by being able to

In addition, the invention described in claim 2 is such that meshes are attached to the openings at opposite ends of a polygonal box-shaped or circular cylindrical filter box, and a spherical or polyhedral shaped filter box is provided inside the filter box. A plurality of balls are filled in a plurality of layers and stacked, and the plurality of balls are of three types: soda glass balls made of soda glass, ceramic balls made of ceramics, and metal balls made of metal. It is composed of a combination of two or three types of beads selected from among the beads, and allows air to pass through while preventing harmful ultraviolet rays (UV-C) from passing through. It is an ultraviolet cut filter characterized by the fact that it is

Since the invention of the present application is configured as described above, the following effects can be achieved.
The ultraviolet cut filter of the invention of the present application has a plurality of spherical or polyhedral beads arranged in a plurality of layers inside a polygonal box-shaped or circular cylindrical filter box in which meshes are attached to opposing end openings, respectively. These balls are stacked and filled, and these balls are made from three types of balls: soda glass balls made of soda glass, ceramic balls made of ceramics, and metal balls made of metal. The structure is made up of a combination of two or three selected types of balls, and this creates a passageway for inhaling outside air into the air purifier and discharging purified air outside the air purifier. Because it is installed in the passageway where the air purifier is installed, it uses ultraviolet rays (UV-C), which contain ultraviolet rays called germicidal radiation with a wavelength of around 253 nanometers, that are irradiated to kill bacteria and viruses in the air that is inhaled into the air purifier. ) is absorbed, reflected, and further absorbed by the plurality of beads packed inside the filter box of the ultraviolet cut filter, so that it is blocked and cannot pass through the ultraviolet cut filter. This can prevent harmful ultraviolet rays (UV-C) from leaking outside the device through the ultraviolet cut filter.
On the other hand, air can pass through the ultraviolet cut filter through the gaps between the beads, so outside air can be sucked into the container through the ultraviolet cut filter, and ultraviolet light ( The air that has been sterilized and purified by UV-C (UV-C) can be discharged outside the device.

In addition, since this ultraviolet cut filter has a simple structure as described above, it is compact and can be manufactured at low cost.
Furthermore, since a plurality of beads are filled in a plurality of stacked layers, the structure of the ultraviolet cut filter is simpler and its ultraviolet blocking effect is improved.

In addition, as mentioned above, this ultraviolet cut filter prevents harmful ultraviolet rays (UV-C) from leaking outside the vessel, while also allowing air to pass through it and be discharged outside the vessel or into the vessel. Conventionally, if this is installed in the passageway that takes in outside air into the air purifier or the passageway that discharges purified air outside the air purifier, it has been used for the same purpose. The previously used light shielding plate (screen plate) and other means are no longer required, making the air purifier more compact, simpler in structure, cheaper to manufacture, and with lower air resistance. Since the fan can also be made smaller, noise can also be reduced.

In addition, window glass is generally made of soda glass, but for example, a window glass with a thickness of 4 mm has zero transmittance for ultraviolet rays (UV-C), and ultraviolet rays (UV-C) It is absorbed by the glass and cannot pass through it.
Therefore, when the plurality of beads are composed of soda glass beads made of soda glass, ultraviolet rays (UV-C) are better absorbed by the plurality of soda glass beads, so that the effect is further improved. By blocking ultraviolet rays (UV-C), it is possible to more effectively prevent ultraviolet rays (UV-C) from passing through the ultraviolet cut filter.
Note that soda glass beads allow visible light to pass through them, so when an ultraviolet lamp is on, the bluish-white visible light emitted along with the ultraviolet light can be seen through the ultraviolet cut filter, making it difficult to turn on the ultraviolet lamp or burn out the lamp. You can also check.

Further, the plurality of balls may be composed of ceramic balls or metal balls made of ceramic or metal. In this case, the material itself blocks ultraviolet rays (UV-C) and In addition to preventing UV-C) from passing through the ultraviolet cut filter, it can also be used in environments where vibrations or shocks are applied.

Furthermore, the plurality of beads filled in the filter box of the ultraviolet cut filter in multiple layers are two types selected from three types of beads: soda glass beads, ceramic beads, and metal beads. It may be composed of a ball or a combination of three types of beads, and in this case, the characteristics of each type of beads are utilized to create an ultraviolet cut filter with excellent performance and durability. can do.
As for how to combine them, you can stack multiple layers by using balls of the same type in the same layer, or you can use balls of the same type distributed in appropriate numbers in different layers. There may be various combinations.

In addition, as mentioned above, this ultraviolet cut filter has the effect of blocking harmful ultraviolet rays (UV-C) but allowing air to pass through, so this feature can be utilized for various applications that require the same effect. It can be applied to For example, it can also be installed at the heat exhaust port of a box in which an ultraviolet lamp is installed.

It is a perspective view of the ultraviolet cut filter of the Example of the invention of this application. It is a longitudinal cross-sectional view of the same ultraviolet cut filter. It is a perspective view of the lower case of the same ultraviolet cut filter. It is a perspective view of the state where the lower case of the same ultraviolet cut filter is filled with a plurality of glass beads. It is a perspective view of the upper case of the same ultraviolet cut filter. It is a figure which shows the laminated structure of the same plurality of glass beads, and is a figure which shows the place where air passes between glass beads. It is a perspective view of the air cleaner in which the same ultraviolet cut filter was installed. It is a perspective view of the duct box which is a component of the same air cleaner. FIG. 2 is a perspective view of the ultraviolet lamp box, which is a component of the air purifier, with the top plate removed. FIG. 2 is a perspective view of the air purifier with the top plate section and the front panel section on the front side removed. FIG. 8 is a perspective view of the air purifier taken along the AA cross section shown in FIG. 7.

(Example 1)
Next, an example (Example 1) of the ultraviolet cut filter of the invention of the present application will be described in detail with reference to the drawings.
The ultraviolet cut filter of Example 1 is mainly used by being installed in an air purifier.
This air purifier sucks outside air into the container, and irradiates the bacteria and viruses in the air with ultraviolet light (UV-C) to kill them. It is designed to exhaust air outside the container.
In the following, first, an ultraviolet cut filter will be explained, and then an air purifier equipped with the ultraviolet cut filter will be explained.

(UV cut filter, its basic structure)
FIG. 1 is a perspective view of the ultraviolet cut filter of Example 1, and FIG. 2 is a longitudinal sectional view thereof.
As shown in FIGS. 1 and 2, this ultraviolet cut filter 1 is inserted from above a square dish-shaped lower case 3 (see FIG. 3 for details), and a square dish-shaped upper case 2 (for details, see FIG. 3). , see Fig. 5) is fitted like the lid of a can, and has the overall shape of a somewhat flat rectangular box, inside which are a plurality of glass beads 6. Filled and configured.
The shapes of the upper case 2 and the lower case 3 are not limited to a rectangular dish shape, but may be any polygonal dish shape, or may be a circular dish shape. Therefore, the shape of the box (filter box) is not limited to a square box shape, but may be any polygonal box shape, or may be a circular cylindrical shape.

(upper case, lower case)
Next, the upper case 2 and the lower case 3 will be explained in more detail.
As shown in FIGS. 5 and 3, the upper case 2 and the lower case 3 have relatively shallow bottoms, and their bottom walls are punched out to form large openings. A metal mesh 4 is tightly stretched and attached to each opening. The bottom of the upper case 2 is considerably shallower than the bottom of the lower case 3 because the upper case 2 only needs to serve as a lid for the lower case 3.
Therefore, when the filter box of the ultraviolet cut filter 1 is completed by assembling the upper case 2 and the lower case 3 as described above, the mesh 4 of the upper case 2 and the mesh 4 of the lower case 3 are are attached to the openings on opposite sides (the right and left ends in FIG. 2), respectively.

As shown in these figures, the mesh 4 is shaped like a punched metal, but is not limited to this, and can be made of a large number of metal wires knitted in a similar shape or intersected at right angles. It may be arranged or assumed to have been done.
In either case, the size of the mesh should be adjusted to prevent the glass beads 6 from falling into the mesh of the mesh 4, which would obstruct the air flow (see Fig. 6), which will be described later. The density (number of pieces per unit area) must be selected appropriately.

The upper case 2 is also provided with attachment feet 5 for attaching the ultraviolet cut filter 1 to an air cleaner 9 (see FIG. 7). As shown in FIG. 1, the mounting foot 5 is a rectangular frame-shaped body (hereinafter referred to as They are called "rectangular frame-like bodies surrounding the opening" (the same applies to the lower case 3), and are attached to the two lower corners of FIG. 1 of the lower case 3.
The manner in which the ultraviolet cut filter 1 is attached to the air cleaner 9 will be described later.

(Filling balls inside the filter box, laminated structure)
Inside the filter box of the ultraviolet cut filter 1, as shown in FIG. 2, a plurality of spherical glass beads 6 are stacked and packed in multiple layers (three layers in FIG. 2) in the left and right direction. There is.
In this case, the layers of the plurality of glass beads 6 are filled with different phases so that the phases do not overlap between adjacent layers. The filter box is supported and held from both sides by meshes 4 attached to openings at opposite ends of the filter box.
Moreover, these plurality of glass beads 6 are made of soda glass.
Note that the shape of the glass beads 6 is not limited to a spherical shape, but may be a polyhedral shape.

FIG. 4 is a perspective view showing a state in which the lower case 3 is filled with a plurality of glass beads 6, and the filter box of the ultraviolet cut filter 1 is opened diagonally with the upper case 2 of FIG. 2 removed. Looking from above.
Although not shown in FIGS. 4 and 3, a glass bead holder is provided on the inner surface of the lower case 3, if necessary, in order to prevent these glass beads 6 from moving. Here, the inner surface of the lower case 3 refers to the inner surface of the four surrounding walls, and the inner surface of the rectangular frame 3a (see FIG. 3) that surrounds the opening (where the mesh 4 is attached). etc.

(Effect of ultraviolet cut filter)
FIG. 6 is a diagram showing air passing between glass beads 6 in a laminated structure of a plurality of glass beads 6.
The air 7 flowing from the lower side of FIG. 6 passes through the space between adjacent glass beads 6 among the plurality of filled glass beads 6, and passes upward in the diagram. I'll go.
On the other hand, the ultraviolet rays (UV-C) 8 that travel in a straight line are absorbed by the glass of the filled glass beads 6, which are filled with a plurality of pieces and have multiple layers, and some of the ultraviolet rays are reflected on the surface of the glass beads 6. (UV-C) 8 is absorbed by the glass of the adjacent glass ball 6 and is blocked, and is not irradiated upward in the figure (does not pass through).
In particular, the glass beads 6 are made of soda glass and have excellent absorption performance for ultraviolet rays (UV-C) 8, so that they can effectively block ultraviolet rays (UV-C) 8.

(Air purifier, its basic structure)
FIG. 7 is a perspective view of the air purifier 9 in which the ultraviolet cut filter 1 of Example 1 is installed, and FIG. 10 is a perspective view of the air purifier 9 with its top plate and front plate removed. It is a similar figure.
As shown in FIGS. 7 and 10, the air purifier 9 has an elongated rectangular box shape as a whole, and its structure is roughly as follows: an ultraviolet lamp box 13 (see FIG. 9 for details) are stacked on top of the duct box 14 (see FIG. 8 for details), and the ultraviolet lamp box 13 is attached to the duct box 14.

Here, the ultraviolet lamp box 13 has its opposite ends (lower left end and upper right end in FIGS. 7, 9, and 10) provided with vents for taking air 7 outside the container into the container. The above-mentioned ultraviolet cut filter 1 is fitted and attached to each of the vent holes.
Therefore, the ultraviolet cut filter 1 also functions as an air intake port (intake port) here.

The air 7 that has passed through the ultraviolet cut filter 1 and is drawn into the container is then irradiated with ultraviolet rays (UV-C) 8, killing bacteria and viruses floating in it, resulting in purified air 7. is discharged to the outside of the air purifier 9 from an outlet 12 that opens at the upper rear side of the air purifier 9 through an internal space formed between the ultraviolet lamp box 13 and the duct box 14.
On the other hand, the irradiated ultraviolet rays (UV-C) 8 cannot pass through the ultraviolet ray cut filter 1 as described above, and the harmful ultraviolet rays (UV-C) 8 pass through the ultraviolet ray cut filter 1 and exit the device. leakage is prevented.
Note that the irradiated ultraviolet light (UV-C) 8 leaks outside the device from the outlet 12 through the internal space formed between the ultraviolet lamp box 13 and the duct box 14 due to its distribution route. , it's long and winding, so there aren't many.

(UV lamp box)
Next, the ultraviolet lamp box 13 will be explained in more detail.
FIG. 9 is a perspective view of the ultraviolet lamp box 13 with the top plate portion (top plate wall) of the ultraviolet lamp box 13 removed.
As shown in FIGS. 7, 9, and 10, the ultraviolet lamp box 13 has the shape of an elongated box with a rectangular cross section. It is installed along the elongated direction of the lamp box 13.
Further, a fan 11 is integrally attached to the lower part of the bottom wall, and a flow port 20 for the air 7 leading to the fan 11 is provided at approximately the center of the bottom wall (see FIG. 10).

It has already been described that the ultraviolet cut filters 1 are fitted and attached to the vents at opposite ends of the ultraviolet lamp box 13, respectively.
In this case, in order to attach the ultraviolet cut filter 1 to the air purifier 9, the above-mentioned mounting feet 5 provided on the upper case 2 of the ultraviolet cut filter 1 are also fixed to the bottom wall of the ultraviolet lamp box 13. As a result, the attachment of the ultraviolet cut filter 1 to the ultraviolet lamp box 13 and, in turn, the attachment of the ultraviolet cut filter 1 to the air cleaner 9 are made even more secure (see FIG. 10).

(Duct box)
Next, the duct box 14 will be explained in more detail.
FIG. 8 is a perspective view of the duct box 14.
As shown in FIG. 8, the duct box 14 has an irregular box shape, and does not have a top plate wall, and only the rear wall (back wall) 17 is a normal box shape. and dimensions.
The front wall (front wall) 18 consists only of a narrow and elongated band plate, and each of the two side walls 19 has a slightly elongated horizontal band part 19a of the same width, and a rear part of the side wall 19. It is made up of only a slightly elongated vertical band plate portion 19b which is perpendicular to this and has a narrower width and has the same width as the thickness (depth) of the spacer 15. This vertical band plate portion 19b extends to the height of the rear wall (rear wall) 17.
Therefore, when the both side walls 19 are viewed from the side, they have the shape of an L-shaped plate. From this, if the entire duct box 14 is viewed from perspective, the duct box 14 generally has the shape of an L-shaped irregular box body having a relatively shallow bottom and an even shallower depth.

A partition plate 16 having the same width (height) as the width of the strip of the front wall (front wall) 18 is erected at the bottom of the duct box 14 near the spacer 15.
The spacer 15 is a rectangular flat plate whose left and right edges are bent short at right angles in FIG. installed there. Its role will be described later.

(Assembling the air purifier)
The ultraviolet lamp box 13 is placed on the strip of the front wall 18 of such a duct box 14 and on each of the horizontal strips 19a of the two side walls 19, and also on each of the longitudinal strips of the two side walls 19. It is placed so as to be in contact with the side of the portion 19b, overlapped on the duct box 14, and fixedly attached thereto. In this way, the air purifier 9 is assembled and completed.
In this way, when the air purifier 9 is assembled and completed, at the same time, there is a gap space between the ultraviolet lamp box 13 and the duct box 14 through which the purified air 7 passes, and an outlet thereof. An air outlet 12 is formed. The spacer 15 serves to form such a gap space.

The vertical, horizontal, and height dimensions of the ultraviolet lamp box 13 are such that when the ultraviolet lamp box 13 is stacked on the duct box 14 as described above, the ultraviolet lamp box 13 conforms to the L-shape of the duct box 14. Since the air purifier 9 is sized to fit into the L-shaped recessed space of the irregularly shaped box, the air purifier 9 as a whole has the shape of an elongated rectangular box.
The fan 11, which is integrally attached to the lower part of the bottom wall of the ultraviolet lamp box 13, is installed in a space on one side of the shallow bottom of the duct box 14 partitioned by a partition plate 16 (the space on the side where the spacer 15 is arranged). (See Figure 10). Note that a control panel is housed in the space on the other side.

(Effect of air purifier)
Next, the operation of the air purifier 9 will be explained.
The air 7 outside the vessel (indoor) is first sucked in by the fan 11, passes through the ultraviolet cut filters 1 attached to the vents at opposite ends of the ultraviolet lamp box 13, and passes through the ultraviolet lamp box 13 inside the vessel. There, it is exposed to ultraviolet light (UV-C) 8 irradiated by an ultraviolet lamp 10, killing bacteria and viruses floating therein and being purified.
The purified air 7 is then further sucked in by the fan 11, passes through the air circulation opening 20 provided in the bottom wall of the ultraviolet lamp box 13, and enters the surrounding space surrounding the fan 11 at the bottom of the duct box 14. is discharged.

In this way, the purified air 7 discharged into the space at the bottom of the duct box 14 is then discharged into the space formed between the rear wall 17 of the duct box 14 and the ultraviolet lamp box 13. The air passes through the gap and is discharged to the outside from the air outlet 12, which is the outlet of the air cleaner 9 and opens at the rear of the upper part of the air cleaner 9.
The outlet 12 here serves as an outlet (exhaust outlet) for the purified air 7.

On the other hand, the irradiated ultraviolet rays (UV-C) 8 either go straight or are reflected by the inner wall surface of the air purifier 9, and when they reach the ultraviolet cut filter 1, the plurality of ultraviolet rays filled in the filter box, A part of the ultraviolet rays (UV-C) 8 absorbed by the glass of the multiple layers of glass beads 6 and reflected by the surface of the glass beads 6 is absorbed by the glass of the adjacent glass beads 6. The ultraviolet rays are blocked and cannot pass through the ultraviolet cut filter 1. This prevents harmful ultraviolet rays (UV-C) 8 from leaking out of the device through the ultraviolet cut filter 1.
Note that the irradiated ultraviolet rays (UV-C) 8 pass through a long and winding air distribution path 7 that passes through the air distribution opening 20, the bottom space of the duct box 14, and the gap space to reach the air outlet 12. There is almost no chance of leakage outside the equipment.

FIG. 11 is a perspective view of the air cleaner 9 shown in FIG. Aspects such as installation, formation of a gap space, and formation of the air outlet 12 are shown more clearly.

(Effects of Example 1)
Since the ultraviolet cut filter 1 of the first embodiment and the air cleaner 9 in which it is installed are configured as described above, the following effects can be achieved.
In the ultraviolet cut filter 1 of the first embodiment, a plurality of spherical glass beads 6 are stacked in a plurality of layers inside a square box-shaped filter box in which meshes 4 are attached to openings at opposite ends of each side. This is the structure in which the air 7 outside the air purifier 9 is inhaled and taken in (specifically, the vents provided at opposite ends of the ultraviolet lamp box 13). Since it is installed in the air purifier 9, ultraviolet rays (UV-C) containing ultraviolet radiation called germicidal radiation with a wavelength of around 253 nanometers are irradiated to kill bacteria and viruses in the air sucked into the air purifier 9. The ultraviolet light 8 is absorbed, reflected, and further absorbed by a plurality of glass beads 9 filled inside the filter box, so that it is blocked and cannot pass through the ultraviolet cut filter 1. Thereby, harmful ultraviolet rays (UV-C) 8 can be prevented from leaking outside the device through the ultraviolet cut filter 1.
It should be noted that this harmful ultraviolet rays (UV-C) 8 is absorbed by the internal space formed between the ultraviolet lamp box 13 and the duct box 14 (this internal space is where the purified air 7 is discharged outside). Since the flow path is long and winding, it is almost impossible for the gas to be discharged from the outlet 12 through the air outlet 12.
On the other hand, the air 7 can pass through the ultraviolet cut filter 1 through the gaps between the beads 6, so the air 7 outside the vessel can be passed through the ultraviolet cut filter 1 into the vessel. Can be inhaled.

Moreover, since this ultraviolet cut filter 1 has a simple structure as described above, it is compact and can be manufactured at low cost.
Furthermore, this ultraviolet cut filter 1 has a plurality of glass beads 6 stacked inside the filter box in a plurality of layers with different phases so that the phases do not overlap between adjacent layers. Since the film is filled with UV-C, the effect of blocking ultraviolet rays (UV-C) 8 is improved.

In addition, window glass is generally made of soda glass, but for example, a window glass with a thickness of 4 mm has zero transmittance for ultraviolet rays (UV-C), and ultraviolet rays (UV-C) It is absorbed by the glass and cannot pass through it.
Therefore, in the plurality of glass beads 6 made of soda glass, the ultraviolet rays (UV-C) 8 are better absorbed by the plurality of glass beads 6, so that the ultraviolet rays (UV-C) 8 are more effectively absorbed by the plurality of glass beads 6. By blocking the ultraviolet rays (UV-C) 8, it is possible to more effectively prevent the ultraviolet rays (UV-C) 8 from passing through the ultraviolet cut filter 1.
Note that the soda glass beads 6 allow visible light to pass through them, so when the ultraviolet lamp 10 is turned on, the bluish-white visible light that is irradiated with the ultraviolet rays can be seen through the ultraviolet cut filter 1. You can check whether the lamp is lit or burnt out.

Furthermore, in the ultraviolet cut filter 1 of the first embodiment, the meshes 4 are attached to the openings at opposite ends of the filter box while being tightly stretched, and the meshes 4 are attached to the openings at opposite ends of the filter box. Since the multiple layers of glass beads 6 are supported and held from both sides by these meshes 4, these layers do not collapse, and the ultraviolet cut filter 1 allows air to pass through. The effect of blocking harmful ultraviolet rays (UV-C) 8 can be stably continued.
In addition, a glass bead holder is provided on the inner surface of the lower case 3 that constitutes the filter box in order to prevent the plurality of glass beads 6 from moving. effect is enhanced.

Further, the spacer 15 attached to the inner surface of the rear wall (rear wall) 17 of the duct box 14 is used to stack the ultraviolet lamp box 13 on top of the duct box 14 and attach and fix it there, thereby assembling the air purifier 9. At the same time, it functions as an auxiliary tool for assembly, and at the same time, it also serves to form a gap space and an outlet 12 through which the purified air 7 passes, thereby allowing the air purifier to The structure of 9 becomes simple and its assembly becomes extremely easy.

Furthermore, as described above, this ultraviolet cut filter 1 prevents harmful ultraviolet rays (UV-C) 8 from leaking outside the device, while allowing air 7 to pass through and be inhaled into the device. Since this is installed in the passageway for inhaling outside air 7 into the air purifier 9, means such as a light shielding plate (screen plate), which was conventionally used for the same purpose, are no longer required. Accordingly, the air purifier 9 becomes more compact, has a simpler structure, can be manufactured at a lower cost, has lower air resistance, and the fan 11 can also be made smaller, thereby reducing noise. Can be done.
Even when the ultraviolet cut filter 1 is installed in a passageway for discharging purified air 7 outside the air purifier 9, means such as a light shielding plate (screen plate), which has conventionally been used for the same purpose, may be used. is no longer necessary, and the same effect can be achieved.

The ultraviolet cut filter of the present invention is not limited to the above embodiments, and various modifications and applications can be made without departing from the gist thereof. Some examples are shown below.
(Example 2)
In Example 1, the ultraviolet cut filter 1 was installed on the air inlet side of the air purifier 9, but instead of this, it may be installed on the air outlet side of the air purifier 9, or it can be installed on the air inlet side of the air purifier 9. It can also be installed both on the air outlet side and on the air outlet side.
To install the ultraviolet cut filter 1 on the air outlet side of the air purifier 9, for example, as shown in FIG. This can be done by attaching it to the upper surface of the bottom wall of the ultraviolet lamp box 13. In this case, the outlet 12 will function as an air intake port, and the ultraviolet cut filter 1 will also function as an air outlet.

In addition, in order to install the ultraviolet cut filter 1 on both the air inlet side and the air outlet side of the air purifier 9, one of the installation locations for the ultraviolet cut filter 1 is to install it on the bottom wall of the ultraviolet lamp box 13. The provided air flow opening 20 can be suitably used.
When the ultraviolet cut filter 1 is installed on the air intake port side of the air purifier 9 as in the first embodiment, the air flow opening 20 will be located on the air outlet side. Therefore, the ultraviolet cut filter 1 can be installed here. Moreover, in this case, the ultraviolet cut filter 1 is located close to the ultraviolet lamp 10 and is located in a place where ultraviolet (UV-C) 8 is likely to leak, so it is effective in blocking it. It is true.
In this way, when the ultraviolet cut filter 1 is installed on both the air inlet side and the air outlet side of the air purifier 9, harmful ultraviolet rays (UV-C) 8 pass through the ultraviolet cut filter 1. It is possible to more completely prevent leakage to the outside of the device.

(Example 3)
In addition, in Example 1, soda glass beads made of soda glass were used as the beads 6 filled inside the filter box of the ultraviolet cut filter 1, but instead of this, soda glass beads made of ceramics were used. Ceramic balls or metal balls made of metal may also be used.
In this case, the material itself can block ultraviolet rays (UV-C) 8 and prevent the ultraviolet rays (UV-C) 8 from passing through the ultraviolet cut filter 1, and also It can also be used in environments where

Further, the surface of each of the soda glass beads, ceramic beads, and metal beads 6 may be made to have fine irregularities like frosted glass. C) It scatters 8 and reduces reflection on the surface, so it absorbs and blocks ultraviolet rays (UV-C) 8 even more effectively, and the ultraviolet rays (UV-C) 8 pass through the ultraviolet cut filter 1. Transmission can be more effectively prevented.

(Example 4)
Furthermore, the plurality of beads 6 filled in the filter box of the ultraviolet cut filter 1 in multiple layers are selected from these three types of beads: soda glass beads, ceramic beads, and metal beads. It is also possible to combine and mix different types of balls or three types of balls. In this case, the characteristics of each type of ball are utilized to create a ball with excellent performance and durability. The ultraviolet cut filter 1 can be manufactured.
As for how to combine them, you can stack multiple layers by using balls of the same type in the same layer, or you can use balls of the same type distributed in appropriate numbers in different layers. There may be various combinations.

(Application example)
As an example of application, for example, by taking advantage of the feature of the ultraviolet cut filter 1 of this embodiment that blocks ultraviolet rays (UV-C) 8 but allows air 7 to pass through, it can be applied to the heat exhaust port of a box in which an ultraviolet lamp is installed. , this can be applied.
To explain in detail, since ultraviolet rays (UV-C) 8 are harmful to the human body, the ultraviolet lamp 10 is usually installed in a box that blocks ultraviolet rays (UV-C) 8, but the ultraviolet lamp 10 is also a lamp. Since it is a type of light, it generates heat when turned on, so if the box is sealed, the temperature inside the box will rise. Therefore, it is necessary to provide vents at the top and bottom of the box to ventilate the air inside the box and dissipate the heat. Cut filter 1 can be used effectively.

1... Ultraviolet cut filter, 2... Upper case, 2a... Rectangular frame-like body, 3... Lower case, 3a... Rectangular frame-like body, 4... Mesh, 5... Mounting foot, 6... Glass ball, 7... Air, 8... Ultraviolet light (UV-C), 9... Air purifier, 10... Ultraviolet lamp, 11... Fan, 12... Air outlet, 13... Ultraviolet lamp box, 14... Duct box, 15... Spacer, 16... Partition plate, 17 ... Rear wall (back wall), 18... Front wall (front wall), 19... Side wall, 19a... Horizontal band plate portion, 19b... Vertical band plate portion, 20... Air circulation opening.

Claims (2)

Air that sucks outside air into a container, kills bacteria and viruses in the air by irradiating ultraviolet rays (UV-C), and then discharges the purified air outside the container. A UV cut filter installed in a purifier,
Mesh is attached to the openings at opposite ends of a polygonal box-shaped or circular cylindrical filter box,
A plurality of spherical or polyhedral balls are packed inside the filter box in a stacked manner,
The plurality of balls are two or three types of balls selected from three types of balls: soda glass balls made of soda glass, ceramic balls made of ceramics, and metal balls made of metal. It is composed of a combination of balls,
It is installed in a passageway for inhaling outside air into the vessel and a passageway for discharging purified air outside the vessel, so that harmful ultraviolet rays (UV-C) leak to the outside of the vessel through the passageway. An ultraviolet cut filter that allows air to pass through while preventing ultraviolet rays. Mesh is attached to the openings at opposite ends of a polygonal box-shaped or circular cylindrical filter box,
A plurality of spherical or polyhedral balls are packed inside the filter box in a stacked manner,
The plurality of balls are two or three types of balls selected from three types of balls: soda glass balls made of soda glass, ceramic balls made of ceramics, and metal balls made of metal. It is composed of a combination of balls,
An ultraviolet cut filter characterized by allowing air to pass through while preventing harmful ultraviolet rays (UV-C) from passing through.

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