JP2022024454A - Ultraviolet ray cleaning apparatus - Google Patents

Abstract

To provide an ultraviolet ray cleaning apparatus capable of realizing downsizing and versatility.SOLUTION: The ultraviolet ray cleaning apparatus pertaining to the embodiment includes: a cylindrical casing having an opening on a part of a side face; a light source disposed at a position inside the casing and facing the opening, and having at least one of light-emitting elements capable of irradiating with ultraviolet rays; a photocatalyst part disposed at a position inside the casing, and capable of making ultraviolet rays incident from the light emission element, and including a photocatalyst; and a lid movable between a first position blocking the opening of the casing and a second position separated from the first position and exposing the opening of the casing.SELECTED DRAWING: Figure 9

Description

Embodiments of the present invention relate to an ultraviolet purification device.

Reflecting the heightened health consciousness, a purification device that purifies the atmosphere in a so-called semi-closed space such as a car such as an automobile or a train, a refrigerator, or a living space has been proposed. For example, a purification device having a light emitting diode that irradiates ultraviolet rays and a photocatalyst sheet carrying a photocatalyst has been proposed. In such a purification device, the photocatalytic sheet is irradiated with ultraviolet rays from a light emitting diode to exert a photocatalytic action, and the expressed photocatalytic action decomposes harmful substances contained in the atmosphere, inactivates bacteria and viruses, and the like. It is carried out.

In addition, a purification device that irradiates the surface of the object with ultraviolet rays to inactivate bacteria and viruses adhering to the surface of the object and decompose organic substances adhering to the surface of the object. Has also been proposed.

Here, it may be necessary to purify the atmosphere and the surface of the object, or one of them may be required depending on the application. For example, there are cases where the removal of harmful substances contained in the atmosphere of the container containing the object, the inactivation of viruses, etc., and the purification of the surface of the object stored inside the container are performed in sequence. be. In addition, for example, when the object changes, it is only necessary to remove harmful substances contained in the atmosphere of the container and inactivate the virus, etc., or the object stored inside the container. Sometimes it is only necessary to clean the surface of the virus.

In such a case, a purification device for purifying the atmosphere and a purification device for purifying the surface of the object can be provided and switched as necessary. However, doing so leads to an increase in size and cost of the purification device.
Therefore, it has been desired to develop an ultraviolet purification device that can be miniaturized and versatile.

Japanese Unexamined Patent Publication No. 2019-130476 Japanese Unexamined Patent Publication No. 2020-081307

An object to be solved by the present invention is to provide an ultraviolet purification device capable of miniaturization and versatility.

The ultraviolet purifying device according to the embodiment has a tubular shape and has a housing having a part of an opening on a side surface; A light source having at least one element; a photocatalyst portion inside the housing, which is provided at a position where ultraviolet rays from the light emitting element can be incident and contains a photocatalyst; It comprises a position and a lid that is movable between a position and a second position that is separated from the first position and the opening of the housing is exposed.

According to the embodiment of the present invention, it is possible to provide an ultraviolet purification device that can be miniaturized and versatile.

It is a schematic perspective view for exemplifying the ultraviolet purification apparatus which concerns on this embodiment. It is a schematic exploded view of the front side of the ultraviolet purification device. It is a schematic exploded view of the back side of the ultraviolet purification device. It is a schematic exploded view for exemplifying the structure of a light source. It is a schematic perspective view for exemplifying the arrangement of a photocatalyst part. It is a schematic exploded view for exemplifying the structure of a photocatalyst part. It is a schematic cross-sectional view for exemplifying the attachment of the photocatalyst part which concerns on other embodiment. It is a schematic cross-sectional view for exemplifying the attachment of the photocatalyst part which concerns on other embodiment. It is a schematic cross-sectional view for exemplifying the attachment of the photocatalyst part which concerns on other embodiment. It is a schematic cross-sectional view for exemplifying the attachment of the photocatalyst part which concerns on other embodiment. It is a schematic perspective view for exemplifying a state in which a lid is opened.

Hereinafter, embodiments will be illustrated with reference to the drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.
FIG. 1 is a schematic perspective view for exemplifying the ultraviolet purification device 1 according to the present embodiment.
FIG. 2 is a schematic exploded view of the front side of the ultraviolet purification device 1.
FIG. 3 is a schematic exploded view of the back side of the ultraviolet purification device 1.
As shown in FIGS. 1 to 3, the ultraviolet purifying device 1 is provided with a housing 2, a lid 3, a light source 4, a photocatalyst unit 5, and an electrical component unit 6.

The housing 2 can have a shape extending in one direction.
The housing 2 has, for example, a frame 21, an end cover 22, an end cover 23, a bottom cover 24, and an upper cover 25.

The frame 21 has, for example, a base 21a and a side portion 21b. The base 21a has a plate shape. The planar shape of the base 21a can be, for example, a rectangle. The side portion 21b has a plate shape and intersects with the base 21a. The side portion 21b can be provided on the peripheral edge of the base 21a on the long side. A pair of side portions 21b can be provided so as to face each other. The length of the side portion 21b in the direction in which the housing 2 extends can be substantially the same as the length of the base 21a. As shown in FIG. 3, the base 21a can be provided with a hole 21a1 for attaching and detaching a battery.

As shown in FIG. 2, the end cover 22 can be provided at one end of the frame 21. The end cover 22 has, for example, a box shape in which the end on the frame 21 side is open. The side portion 22a of the end cover 22 can be screwed to, for example, the side portion 21b of the frame 21. An intake port 22b1 can be provided on the end surface 22b of the end cover 22. The intake port 22b1 may have a plurality of holes as illustrated in FIG. 2, for example. The diameter of the hole can be set to, for example, about 1 mm in order to prevent foreign matter, an operator's finger, or the like from entering the inside of the housing 2. The shape, size, number, arrangement, etc. of the holes can be appropriately changed according to the size and application of the ultraviolet purification device 1, the capacity of the exhaust device 62 described later, and the like. Further, the intake port 22b1 may be, for example, a net provided in the opening of the end face 22b.

The end cover 23 can be provided at the other end of the frame 21. The end cover 23 has, for example, a box shape in which the end on the frame 21 side is open. The side portion 23a of the end cover 23 can be screwed to, for example, the side portion 21b of the frame 21. An exhaust port 23b1 can be provided on the end surface 23b of the end cover 23. The exhaust port 23b1 may have a plurality of holes as illustrated in FIG. 2, for example. The diameter of the hole can be set to, for example, about 1 mm in order to prevent foreign matter, an operator's finger, or the like from entering the inside of the housing 2. The shape, size, number, arrangement, etc. of the holes can be appropriately changed according to the size, application, capacity of the exhaust device 62, and the like of the ultraviolet purification device 1. Further, the exhaust port 23b1 may be, for example, a net provided in the opening of the end face 23b.
That is, an intake port 22b1 is provided at one end of the housing 2, and an exhaust port 23b1 is provided at the other end of the housing 2.

As shown in FIG. 3, the bottom cover 24 can close the hole 21a1 of the base 21a. The bottom cover 24 has a plate shape and can be detachably provided on the base 21a. The bottom cover 24 can be screwed to, for example, the base 21a. If the bottom cover 24 is removable, the battery can be easily attached and detached, so that maintainability can be improved.

As shown in FIG. 2, the top cover 25 has, for example, a base 25a and a side portion 25b. The base 25a has a plate shape. The planar shape of the base 25a can be, for example, a rectangle. The length of the base 25a in the direction in which the housing 2 extends is shorter than the length of the base 21a. The base 25a can be provided so as to face the region of the base 21a on the end cover 23 side. The base 25a is not provided above the light emitting element 43 of the light source 4.

The side portion 25b has a plate shape and intersects with the base 25a. The side portion 25b can be provided on the peripheral edge of the base 25a on the long side. A pair of side portions 25b can be provided so as to face each other. The planar shape of the side portion 25b can be, for example, a rectangle. The length of the side portion 25b in the direction in which the housing 2 extends can be substantially the same as the length of the side portion 21b. The upper cover 25 can be detachably provided on the frame 21. For example, the top cover 25 can be screwed to the frame 21.

Although the case where the frame 21, the end cover 22, the end cover 23, and the upper cover 25 are fastened with screws or the like is illustrated, these can be fixed by welding or integrally formed.

The materials of the frame 21, the end cover 22, the end cover 23, the bottom cover 24, and the top cover 25 are not particularly limited.
However, when the amount of heat generated by the light emitting element 43, which will be described later, is large, it is preferable to form them using a material having high thermal conductivity from the viewpoint of heat dissipation. Examples of the material having high thermal conductivity include metals such as aluminum, aluminum alloys, and stainless steel.

Further, in consideration of integrating the frame 21, the end cover 22, the end cover 23, and the upper cover 25 and reducing the weight, it is preferable to form them using a resin. For example, they can be integrally formed by using an injection molding method.

In this case, if an acrylic resin (polymethylmethacrylate resin) is used, it is possible to improve the resistance to ultraviolet rays emitted from the light emitting element 43 and the resistance to VOCs (Volatile Organic Compounds) contained in the atmosphere. can. Further, if the degree of polymerization of the acrylic resin is about 10,000 to 15,000, odor can be suppressed.

Further, if an ABS resin (acrylic nitrile-butadiene-styrene copolymer synthetic resin) is used, the moldability can be improved and the cost can be reduced. In this case, the strength can be improved by using the reinforced ABS resin. The reinforced ABS resin is a mixture of ABS resin and glass fiber.

As described above, the housing 2 has a cylindrical shape, and a part of the side surface thereof is open.

The lid 3 has, for example, a base 3a and a side portion 3b. The base 3a has a plate shape. The planar shape of the base 3a can be, for example, a rectangle. The length of the base 3a in the direction in which the housing 2 extends can be substantially the same as or longer than the length of the region provided with the light emitting element 43 of the light source 4. The base 3a can face the cover 45 of the light source 4.

The side portion 3b has a plate shape and intersects with the base 3a. The side portion 3b can be provided on the peripheral edge of the base 3a on the long side. A pair of side portions 3b can be provided so as to face each other. The planar shape of the side portion 3b can be, for example, a rectangle. The length of the side portion 3b in the direction in which the housing 2 extends can be substantially the same as the length of the base 3a.

The lid 3 is movable between a position above the light source 4 and a position separated from the position. For example, the lid 3 can be provided so as to be movable in the direction in which the housing 2 extends. For example, as shown in FIGS. 1 to 3, a hole 3b1 extending in a direction in which the housing 2 extends is provided in the side portion 3b, is inserted into the hole 3b1, and one end thereof is provided in the side portion 25b of the upper cover 25. A fixed pin 25c can be provided. By doing so, the lid 3 can be slid in the direction in which the housing 2 extends.

Further, as shown in FIGS. 1 to 3, the side portion 25b of the upper cover 25 may be provided with a convex portion 25b1 projecting outward. The convex portion 25b1 can be brought into contact with the end portion of the side portion 3b of the lid 3. As shown in FIGS. 1 to 3, a plurality of convex portions 25b1 can be provided side by side in the direction in which the housing 2 extends. Further, one convex portion 25b1 extending in the extending direction of the housing 2 may be provided. If the convex portion 25b1 is provided, the posture of the lid 3 can be stabilized when the lid 3 is moved.

Although the case where one lid 3 is provided is illustrated, a plurality of lids 3 can be provided, for example, two lids 3 are provided, one lid slides toward the end cover 22, and the other lid is provided. It may be slid toward the end cover 23 side, but if one lid 3 is provided, the structure can be simplified and the manufacturing cost can be reduced.

Although the lid 3 that can be moved in the direction in which the housing 2 extends is illustrated, the lid 3 is separated from the first position that closes the opening of the housing 2 and the opening of the housing 2. It suffices if it can be moved between the exposed second position.
For example, the lid may be a door that opens above the light source 4, or the lid may be a plate-like body that swivels toward the side of the frame 21. However, in this way, a space for moving the lid is required above or to the side of the frame 21. On the other hand, if the lid 3 is movable in the direction in which the housing 2 extends, it is not necessary to provide a space for moving the lid 3, or the lid 3 can be made small, so that space can be saved.

Further, the lid can be detachably provided on the frame 21. However, if this is done, the work of attaching and detaching the lid is required, so that the time required for switching the application becomes long and the switching work becomes complicated. On the other hand, if the lid 3 is movable in the direction in which the housing 2 extends, the lid 3 only needs to be slid when switching applications, so that the switching time can be shortened and the switching work can be simplified. Can be done.

The material of the lid 3 can be the same as the material of the housing 2 described above.

As shown in FIG. 2, the light source 4 is provided inside the housing 2 at a position facing the opening provided on the side surface of the housing 2.
FIG. 4 is a schematic exploded view for illustrating the configuration of the light source 4.
As shown in FIG. 4, the light source 4 has, for example, a bracket 41, a substrate 42, a light emitting element 43, a connector 44, and a cover 45.

The bracket 41 can be detachably provided on the base 21a. The bracket 41 can be screwed to, for example, the base 21a. The bracket 41 has, for example, a box shape having an open end on the base 21a side. The electrical component 6 can be housed inside the bracket 41.

The substrate 42 has a plate shape and extends in the direction in which the housing 2 extends. The substrate 42 can be detachably provided on the surface 41a of the bracket 41 facing the base 21a. For example, the substrate 42 can be held by the bracket 41 by a plurality of claws 41b provided on the surface 41a. For example, the claw 41b can be bent toward the substrate 42, and the substrate 42 can be sandwiched between the plurality of claws 41b and the surface 41a.

A wiring pattern can be provided on the surface of the substrate 42 opposite to the bracket 41 side.
The material and structure of the substrate 42 are not particularly limited. For example, the substrate 42 can be formed from an inorganic material (ceramics) such as aluminum oxide or aluminum nitride, an organic material such as paper phenol or glass epoxy, or the like. Further, the substrate 42 may be a metal plate whose surface is coated with an insulating material.

When the heat generation amount of the light emitting element 43 is large, it is preferable to form the substrate 42 by using a material having high thermal conductivity from the viewpoint of heat dissipation. Examples of the material having high thermal conductivity include ceramics such as aluminum oxide and aluminum nitride, a high thermal conductive resin, and a metal plate whose surface is coated with an insulating material. The high thermal conductivity resin is, for example, a resin such as PET (polyethylene terephthalate) or nylon mixed with a filler made of aluminum oxide having high thermal conductivity.
Further, the substrate 42 may have a single-layer structure or may have a multi-layer structure.

The light emitting element 43 can be provided on the surface of the substrate 42 opposite to the bracket 41 side. At least one light emitting element 43 can be provided. The light emitting element 43 is electrically connected to a wiring pattern provided on the substrate 42. When a plurality of light emitting elements 43 are provided, the plurality of light emitting elements 43 can be connected in series.

The arrangement of the plurality of light emitting elements 43 is not particularly limited. For example, as shown in FIG. 2, the plurality of light emitting elements 43 can be provided side by side in the direction in which the housing 2 extends. Further, the plurality of light emitting elements 43 may be provided side by side in a matrix, for example. When a plurality of light emitting elements 43 are provided side by side, the plurality of light emitting elements 43 can be arranged at equal pitch intervals, or the plurality of light emitting elements 43 can be arranged at different pitch dimensions.

The type of the light emitting element 43 is not particularly limited. The light emitting element 43 can be, for example, a surface mount type light emitting element such as a PLCC (Plastic Leaded Chip Carrier) type. The light emitting element 43 may be, for example, a light emitting element having a lead wire such as a cannonball type.

Further, the light emitting element 43 may be mounted by a COB (Chip On Board). In the case of the light emitting element 43 mounted by COB, a chip-shaped light emitting element, wiring for electrically connecting the light emitting element and the wiring pattern, a sealing portion for covering the chip-shaped light emitting element, wiring, etc. Can be provided on the substrate 42.

The light emitting element 43 irradiates ultraviolet rays. The light emitting element 43 can be, for example, a light emitting diode or a laser diode capable of irradiating ultraviolet rays.
Here, if the wavelength of ultraviolet rays is shortened, bacteria and viruses that adhere to the surface of the object or float in the atmosphere provided with the object or in the internal space of the ultraviolet purification device 1 can be inactivated. , The decomposition of organic substances becomes easy. Therefore, when purifying the surface of an object or purifying a space, it is preferable to use a light emitting element 43 that irradiates ultraviolet rays having a peak wavelength of 250 nm or more and 350 nm or less.

Further, the reaction rate of the photocatalyst changes depending on the absorption wavelength region of the photocatalyst and the light intensity (light intensity). The absorption wavelength region of the photocatalyst changes depending on the material and composition of the photocatalyst. Therefore, when purifying the atmosphere, it is preferable to consider the combination of the material and composition of the photocatalyst and the light emitting element that irradiates ultraviolet rays having an appropriate wavelength.

For example, when the photocatalyst is an ultraviolet responsive photocatalyst such as titanium oxide, it is preferable that the light emitting element 43 irradiates ultraviolet rays having a peak wavelength of 380 nm or less. For example, when the photocatalyst is a visible light responsive photocatalyst such as tungsten oxide, it is preferable that the light emitting element 43 irradiates light having a peak wavelength of 380 nm or more (for example, about 400 nm to 600 nm).

In this case, if the photocatalyst is an ultraviolet responsive photocatalyst such as titanium oxide and the light emitting element 43 irradiates ultraviolet rays having a peak wavelength of 380 nm or less, one type of light emitting element 43 can be used to purify the surface of the object and to improve the atmosphere. Purification can be performed.

However, as described above, the shorter the wavelength of ultraviolet rays, the easier it is to purify the surface of the object. Therefore, a first light emitting element 43a for irradiating ultraviolet rays having a first peak wavelength and a second light emitting element 43b for irradiating ultraviolet rays having a second peak wavelength shorter than the first peak wavelength are provided. Is preferable. The first peak wavelength is preferably in or near the absorption wavelength region of the photocatalyst. For example, the first peak wavelength is preferably 300 nm or more and 450 nm or less. The second peak wavelength is preferably, for example, 250 nm or more and 350 nm or less.

The connector 44 can be provided on the surface of the substrate 42 opposite to the bracket 41 side. The connector 44 can be provided, for example, in the vicinity of the end portion of the substrate 42 on the end cover 23 side. If the connector 44 is provided, it becomes easy to separate the wiring of the electrical component 6 from the substrate 42, so that work such as assembly and maintenance becomes easy.

As shown in FIGS. 2 and 4, the cover 45 can cover the side of the substrate 42 where the light emitting element 43 is provided. The cover 45 is provided with a hole 45a, and the light emitting element 43 can be exposed inside the hole 45a. The cover 45 can be detachably provided on the bracket 41. For example, the cover 45 can be screwed to the bracket 41.

FIG. 5 is a schematic perspective view for exemplifying the arrangement of the photocatalyst unit 5.
FIG. 6 is a schematic exploded view for illustrating the configuration of the photocatalyst unit 5.
The photocatalyst unit 5 can be provided inside the housing 2 at a position where ultraviolet rays from the light emitting element 43 can be incident.
As shown in FIG. 5, the photocatalyst unit 5 can be provided inside the upper cover 25. For example, the photocatalyst unit 5 can be screwed to the inside of the upper cover 25. As shown in FIG. 8 to be described later, a region provided with a light emitting element 43 of the light source 4 is exposed in the space between the end cover 22 and the photocatalyst unit 5. Therefore, a part of the ultraviolet rays emitted from the light emitting element 43 can be incident on the photocatalyst unit 5.

In this case, it is preferable to increase the reflectance of the inner wall of the lid 3, the inner wall of the side portion 25b of the upper cover 25, and the surface of the cover 45 on the side opposite to the substrate 42 side to ultraviolet rays. For example, these inner walls and surfaces can be mirror-finished, a reflective film can be formed on these inner walls and surfaces, these inner walls and surfaces can be painted white, and reflective sheets can be attached to these inner walls and surfaces. Alternatively, the lid 3, the upper cover 25, and the cover 45 can be formed of a mirror-finished plate material or a white plate material. By doing so, the ultraviolet rays emitted from the light emitting element 43 and reflected by the inner wall of the lid 3 or the like can be incident on the photocatalyst unit 5, so that the utilization efficiency of the ultraviolet rays can be improved.

For example, on the inner wall side of the housing 2, at least in the vicinity of the portion provided with the opening, the reflectance to ultraviolet rays can be made higher than that on the outer wall side of the housing 2.
For example, the housing 2 side of the lid 3 can have a higher reflectance to ultraviolet rays than the side of the lid 3 opposite to the housing 2 side.
For example, the side of the cover 45 opposite to the substrate 42 side may have a higher reflectance to ultraviolet rays than the cover 45 side of the substrate 42.

The photocatalyst unit 5 contains a photocatalyst.
As shown in FIG. 6, the photocatalyst unit 5 can have a photocatalyst sheet 51 and a bracket 52.
At least one photocatalyst sheet 51 can be provided. For example, the photocatalyst sheet 51 may be provided on one surface of the bracket 52, or the photocatalyst sheet 51 may be provided on both surfaces of the bracket 52 as shown in FIG.

The photocatalyst sheet 51 has, for example, a fiber woven fabric using glass fiber, metal fiber, or the like, and photocatalyst particles.
The textile woven fabric can be, for example, a woven fabric consisting of a group of weft threads and a group of warp threads in which transparent glass fibers or metal fibers are bundled. A large number of photocatalytic particles are carried between the fibers.

In this case, the photocatalyst sheet 51 can be created, for example, as follows.
First, phosphoric acid is added to pure water to generate an aqueous solution having a pH (hydrogen ion concentration) adjusted to 2 to 7, and photocatalytic particles are added to generate an emulsion solution.
Next, the glass fiber woven fabric is immersed in the emulsion solution for a predetermined time.
Next, the glass fiber fabric is pulled up from the emulsion solution and dried.
In this way, the photocatalyst sheet 51 in which a large number of photocatalyst particles are carried between the glass fibers can be produced.

As described above, it is preferable that the photocatalyst particles include an ultraviolet responsive photocatalyst. The ultraviolet responsive photocatalyst can be, for example, titanium oxide.

The bracket 52 can be screwed into, for example, the inside of the upper cover 25. The bracket 52 is provided with a plurality of holes 52a. The plurality of holes 52a serve as a flow path for gas flowing inside the housing 2. If the size or number of the plurality of holes 52a is reduced, the flow path resistance of the gas flowing inside the housing 2 becomes too large, and the processing capacity may decrease. If the size or number of the plurality of holes 52a is increased, the photocatalyst sheet 51 may be deformed. Therefore, it is preferable to appropriately determine the size, number, arrangement, etc. of the plurality of holes 52a by conducting experiments or simulations in advance according to the required gas flow rate, flow velocity, and the like.
The bracket may be a frame-shaped member or the like as long as it can hold the photocatalyst sheet 51. When the bracket is a frame-shaped member, for example, the photocatalyst sheet 51 can be sandwiched between the brackets.

FIG. 7 is a schematic cross-sectional view for illustrating the attachment of the photocatalyst unit 5 according to another embodiment.
As shown in FIG. 7, a first light emitting element 43a for irradiating ultraviolet rays having a first peak wavelength is provided in the vicinity of the exhaust port 23b1 side of the photocatalyst unit 5, and the photocatalyst unit 5 is provided on the intake port 22b1 side. A second light emitting element 43b that irradiates ultraviolet rays having a second peak wavelength shorter than the first peak wavelength can be provided in the vicinity.

As will be described later, when purifying the surface of an object by ultraviolet rays or purifying the atmosphere in which the object is provided by ultraviolet rays, the lid 3 is slid toward the end cover 23 to purify the ultraviolet rays. Irradiate the outside of 1. Therefore, if the second light emitting element 43b that irradiates the ultraviolet rays having the second peak wavelength is provided in the vicinity of the intake port 22b1 side of the photocatalyst unit 5, the intensity of the ultraviolet rays irradiating to the outside can be improved. Therefore, it becomes easy to purify the surface of the object by ultraviolet rays and the atmosphere in which the object is provided by ultraviolet rays.

Further, when purifying the internal space of the ultraviolet purification device 1 by ultraviolet rays, the lid 3 is slid toward the end cover 22 side to suppress the ultraviolet rays from being irradiated to the outside of the ultraviolet purification device 1. .. In this case, the ultraviolet rays emitted from the light emitting element 43 are applied to the internal space defined by the housing 2 and the upper cover 3. Therefore, if the second light emitting element 43b that irradiates the ultraviolet rays having the second peak wavelength is provided in the vicinity of the intake port 22b1 side of the photocatalyst unit 5, the internal space of the ultraviolet purification device 1 can be easily purified.

FIG. 8 is a schematic cross-sectional view for illustrating the attachment of the photocatalyst unit 5 according to another embodiment.
As shown in FIG. 8, a first light emitting element 43a for irradiating ultraviolet rays having a first peak wavelength is provided in the vicinity of the exhaust port 23b1 side and the vicinity of the intake port 22b1 side of the photocatalyst unit 5, respectively, and a photocatalyst is provided. The other light emitting element provided between the unit 5 and the intake port 22b1 can be a second light emitting element 43b that irradiates ultraviolet rays having a second peak wavelength shorter than the first peak wavelength.
By doing so, a large amount of ultraviolet rays having a first peak wavelength suitable for manifesting the photocatalytic action can be incident on the photocatalytic sheet 51. Therefore, the expression of photocatalytic action becomes easy.

FIG. 9 is a schematic cross-sectional view for illustrating the attachment of the photocatalyst unit 5 according to another embodiment.
As shown in FIG. 9, the photocatalyst unit 5 can be provided with the end portion 5a on the side opposite to the light source 4 side tilted in a direction approaching the end cover 22. By doing so, the ultraviolet rays emitted from the light emitting element 43 are likely to be directly incident on the photocatalyst sheet 51. In this case, as shown in FIG. 9, a first light emitting element 43a for irradiating ultraviolet rays having a first peak wavelength is provided on both sides in the vicinity of the photocatalyst unit 5, and the other light emitting elements are set from the first peak wavelength. Can also be a second light emitting element 43b that irradiates ultraviolet light having a short second peak wavelength. By doing so, it becomes easy to directly incident ultraviolet rays having a wavelength suitable for manifesting the photocatalytic action on the photocatalytic sheet 51. Therefore, the expression of photocatalytic action becomes easy.

FIG. 10 is a schematic cross-sectional view for illustrating the attachment of the photocatalyst unit 5 according to another embodiment.
As shown in FIG. 10, the photocatalyst unit 5 can be provided with the end portion 5a on the side opposite to the light source 4 side tilted in a direction approaching the end cover 23. Further, the above-mentioned first light emitting element 43a can be provided on the end cover 23 side of the photocatalyst unit 5. By doing so, it becomes easy to directly incident ultraviolet rays having a wavelength suitable for manifesting the photocatalytic action on the photocatalytic sheet 51. Therefore, the expression of photocatalytic action becomes easy.

As illustrated in FIGS. 5, 7, and 8, the photocatalyst unit 5 can be provided so as to be substantially perpendicular to the surface of the substrate 42 on which the light emitting element 43 is provided.
Further, as illustrated in FIGS. 9 and 10, the photocatalyst unit 5 may be provided at an angle with respect to the surface of the substrate 42 on which the light emitting element 43 is provided.

As shown in FIGS. 1 to 3, the electrical component 6 may include, for example, a switch 61, an exhaust device 62, a battery 63, and a circuit board 64.

The switch 61 can be provided in the housing 2. For example, the switch 61 can be provided on the end cover 23 as shown in FIGS. 1 to 3. For example, when the switch 61 is turned on, the battery 63 and the light emitting element 43 are electrically connected, and ultraviolet rays are emitted from the light emitting element 43. Further, the battery 63 and the exhaust device 62 are electrically connected to each other, and a forced gas flow is generated inside the housing 2.

For example, when the switch 61 is turned off, the electrical connection between the battery 63 and the light emitting element 43 is cut off, and the irradiation of ultraviolet rays from the light emitting element 43 is stopped. Further, the electrical connection between the battery 63 and the exhaust device 62 is cut off, and the forced gas flow is stopped.

A switch for controlling the light emitting element 43 and a switch for controlling the exhaust device 62 may be provided separately. However, the use of the ultraviolet purification device 1 can be switched by moving the lid 3. Therefore, as shown in FIGS. 1 to 3, if one switch 61 for controlling the light emitting element 43 and the exhaust device 62 is provided, the usage can be switched and the manufacturing cost can be reduced. be able to.

The exhaust device 62 can be provided inside the housing 2. For example, as shown in FIGS. 1 to 3, the exhaust device 62 can be provided in a portion of the end cover 23 where the exhaust port 23b1 is provided. The exhaust device 62 can be, for example, a so-called propeller fan. If the exhaust device 62 is a propeller fan, the gas flow rate can be increased.

The battery 63 can be provided inside the housing 2. For example, the battery 63 can be provided inside the bracket 41. In this case, as shown in FIG. 3, the battery 63 can be exposed to the hole 21a1 of the base 21a. The battery 63 may be a primary battery such as an alkaline manganese dry battery, or a secondary battery such as a lithium ion battery. Further, an AC / DC converter or the like can be provided instead of the battery 63. However, if the battery 63 is provided, it is not necessary to make an electrical connection with an external power source, so that the ultraviolet purification device 1 can be miniaturized, portability can be improved, and the cost can be reduced.

The circuit board 64 can be provided inside the housing 2. For example, the circuit board 64 can be provided inside the bracket 41. The circuit board 64 may be provided with electrical components such as a resistor and a diode for protecting the light emitting element 43, for example. The circuit board 64 may be provided as needed. For example, when an electric component such as a resistor or a diode is provided on the substrate 42, the circuit board 64 can be omitted.

Further, although the case where the operator operates the switch 61 to control the light emitting element 43 and the exhaust device 62 is illustrated, the light emitting element 43 and the exhaust device 62 can be remotely controlled by wireless or wired. In such a case, a receiving circuit, a switching element, or the like can be provided on the circuit board 64.

Next, switching of uses of the ultraviolet purification device 1 will be described.
FIG. 11 is a schematic perspective view for exemplifying a state in which the lid 3 is opened.
When the ultraviolet purification device 1 is used as a purification device for purifying the surface of an object, the lid 3 is slid toward the end cover 23 as shown in FIG. Then, since the upper part of the light source 4 (light emitting element 43) is released, the ultraviolet rays are irradiated to the outside of the ultraviolet purification device 1. Therefore, the surface of the object can be irradiated with ultraviolet rays from the ultraviolet purification device 1.

When the ultraviolet purification device 1 is used as a purification device for purifying the atmosphere, the lid 3 is slid toward the end cover 22 as shown in FIG. Then, the space defined by the housing 2 and the upper cover 3 becomes a flow path of the gas flowing from the intake port 22b1 toward the exhaust port 23b1. Since the light source 4 and the photocatalyst unit 5 are housed in the space defined by the housing 2 and the upper cover 3, the gas flowing from the intake port 22b1 to the exhaust port 23b1 can be purified by the photocatalytic action.
Further, since the space defined by the housing 2 and the upper cover 3 is irradiated with ultraviolet rays having a peak wavelength of 250 nm or more and 350 nm or less from the second light emitting element 43b, the space is suspended in the internal space of the ultraviolet purification device 1. It can inactivate or sterilize the bacteria and viruses that are growing.

As described above, in the case of the ultraviolet purification device 1 according to the present embodiment, by moving the lid 3, the atmosphere is purified by the photocatalytic action, the internal space of the ultraviolet purification device 1 is purified by the ultraviolet rays, and the ultraviolet rays are used. It is possible to switch between purifying the surface and atmosphere of the object by. Further, it is possible to use the ultraviolet purifying device 1 only for purifying the atmosphere, for purifying the internal space of the ultraviolet purifying device 1, or for purifying the surface of an object.
Therefore, the ultraviolet purification device 1 can be made smaller and more versatile.

Although some embodiments of the present invention have been exemplified above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, changes, and the like can be made without departing from the gist of the invention. These embodiments and variations thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof. In addition, each of the above-described embodiments can be implemented in combination with each other.

1 UV purifier, 2 chassis, 3 lids, 4 light sources, 5 photocatalysts, 6 electrical components, 21 frames, 22 end covers, 22b1 intake ports, 23 end covers, 23b1 exhaust ports, 25 top covers, 42 boards , 43 light source element, 43a light source element, 43b light source element, 45 cover, 51 photocatalyst sheet, 52 bracket, 61 switch, 62 exhaust device, 63 battery

Claims (11)

With a cylindrical housing with a part of the side opening;
A light source inside the housing, which is provided at a position facing the opening and has at least one light emitting element capable of irradiating ultraviolet rays;
A photocatalyst unit including a photocatalyst, which is provided inside the housing at a position where ultraviolet rays from the light emitting element can be incident.
A lid that is movable between a first position that closes the opening of the housing and a second position that is separated from the first position and the opening of the housing is exposed;
UV purification device equipped with. The housing has a shape extending in one direction and has a shape extending in one direction.
The ultraviolet purification device according to claim 1, wherein the lid is movable in a direction in which the housing extends. An air intake is provided at one end of the housing.
The ultraviolet purification device according to claim 1 or 2, wherein an exhaust port is provided at the other end of the housing. The ultraviolet purification device according to any one of claims 1 to 3, further comprising an exhaust device provided inside the housing. The light source is
A first light emitting element that irradiates ultraviolet rays having a first peak wavelength, and
A second light emitting device that irradiates ultraviolet rays having a second peak wavelength shorter than the first peak wavelength, and
The ultraviolet purification device according to any one of claims 1 to 4. The ultraviolet purification device according to claim 5, wherein the first peak wavelength is 300 nm or more and 450 nm or less. The ultraviolet purification device according to claim 5 or 6, wherein the second peak wavelength is 250 nm or more and 350 nm or less. The ultraviolet ray according to any one of claims 1 to 7, wherein at least the vicinity of the portion provided with the opening on the inner wall side of the housing has a higher reflectance to the ultraviolet ray than the outer wall side of the housing. Purification device. The ultraviolet purification device according to any one of claims 1 to 8, wherein the housing side of the lid has a higher reflectance to the ultraviolet rays than the side of the lid opposite to the housing side. The light source is
With the substrate on which the light emitting element is provided;
With a cover that covers the side of the substrate on which the light emitting element is provided and has a hole through which the light emitting element is exposed;
Have,
The ultraviolet purification device according to any one of claims 1 to 9, wherein the side of the cover opposite to the substrate side has a higher reflectance to the ultraviolet rays than the substrate side of the cover. The ultraviolet purification device according to claim 10, wherein the photocatalyst unit is tilted with respect to a surface of the substrate on which the light emitting element is provided.

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