WO2023204194A1 - Electromagnetic wave blocking filter - Google Patents

Abstract

The present invention is characterized by including: a cylindrical inner-wall assembly comprising a plurality of cylindrical inner walls that are parallel and that divide a space on the inner side of a support body; and a low reflectance part that is disposed on the surface of the cylindrical inner walls and that has an electromagnetic wave reflectance of no more than a prescribed amount. The present invention is also characterized in that electromagnetic waves are blocked by the cylindrical inner-wall assembly.

Description

Electromagnetic wave blocking filter

The present invention relates to an electromagnetic wave blocking filter that prevents leakage of electromagnetic waves.

Conventionally, air purifiers are known that use ultraviolet light to sterilize the air (remove bacteria and viruses to reduce their number), and the air is taken into the suction chamber through the intake opening provided at the bottom of the housing. is cleaned and discharged from a discharge opening provided on the top surface of the housing (for example, see Patent Document 1). The air purifier described in Patent Document 1 sucks air containing viruses, bacteria, and various pollutants into a suction chamber through a pre-filter, and collects various pollutants using a HEPA filter in the suction chamber. ing. Furthermore, an ultraviolet lamp is installed in the suction chamber, and the aerosol and droplet nuclei of contaminants that have passed through the HEPA filter are irradiated with ultraviolet light to decompose or remove various contaminants.

Japanese Patent Application Publication No. 2021-180826

The ultraviolet rays used in the air cleaner described in Patent Document 1 mentioned above have strong sterilizing ability, but are harmful to the human body. Therefore, in order to take sufficient measures against the leakage of ultraviolet rays, a reflux plate was placed between the ultraviolet lamp and the exhaust opening. This reflux plate has a size that prevents ultraviolet rays from the ultraviolet lamp from passing through the exhaust opening, so there is a problem in that it blocks the flow of air. If the flow of air is obstructed, the pressure loss will increase, which will prevent the air purifier from sucking in air containing toxic substances, which are various pollutants, and discharging air with the toxic substances reduced. However, there is a problem in that the efficiency of reducing toxic targets is significantly reduced. In addition, if the fan motor output is increased to compensate for the pressure loss, not only will energy consumption increase, but if the fan diameter is increased to reduce noise, the overall size will also increase. There was a problem in that an unreasonable situation would arise.

The present invention was achieved through intensive research by the inventor in view of the above-mentioned problems, and has a simple structure that eliminates electromagnetic waves such as ultraviolet rays without impeding the flow of air or reducing the air flow velocity. The purpose is to provide a means for blocking and preventing leakage to the outside.

The electromagnetic wave blocking filter of the present invention includes a cylindrical inner wall assembly consisting of a plurality of parallel cylindrical inner walls that partition a space inside a support, and a cylindrical inner wall assembly provided on the surface of the cylindrical inner wall, so that the reflectance of electromagnetic waves is below a predetermined value. and a low reflection portion, which is characterized in that the cylindrical inner wall assembly blocks electromagnetic waves.

Furthermore, the electromagnetic wave blocking filter of the present invention is characterized in that the cylindrical inner wall assembly is arranged in a direction in which the axial center of the cylindrical inner wall is inclined with respect to the axial center of the support body.

Further, in the electromagnetic wave blocking filter of the present invention, the cylindrical inner wall assembly is provided so as to be able to fit into the support, and the cylindrical inner wall is attached to the support in an inclined attitude with respect to the peripheral surface of the support. It is characterized by being supported by

Furthermore, the electromagnetic wave blocking filter of the present invention is characterized in that the support body supports a plurality of the cylindrical inner wall aggregates.

Furthermore, the electromagnetic wave blocking filter of the present invention is characterized in that the cylindrical inner wall assembly has a plurality of cylindrical inner walls arranged in multiple stages along the axial direction.

Furthermore, the electromagnetic wave blocking filter of the present invention is characterized in that the cylindrical inner wall aggregate blocks electromagnetic waves of different wavelengths for each stage.

According to the present invention, it is possible to block electromagnetic waves and prevent them from leaking to the outside without interfering with the flow of air or reducing the flow velocity of the air.

FIG. 2 is a block diagram showing a unit insertion/removal type toxicity target reduction device of the present invention. FIG. 3 is a block diagram showing the constituent elements of the main body and the insertion/removal unit. FIG. 2 is a perspective view showing a unit insertion/removal type toxicity target reduction device. FIG. 3 is a perspective view showing the main body with the upper end removed. The insertion/removal unit is shown, with (a) being a perspective view and (b) being a side view. FIG. 3 is a sectional view taken along line AA showing the insertion/removal unit. It is a BB sectional view showing the insertion/removal unit. FIG. 3 is a perspective view showing the lower end member of the insertion/removal unit. FIG. 2 is a sectional view showing a unit insertion/removal type toxicity target reduction device. FIG. 3 is a diagram showing an insertion/removal unit housed in the main body. It is a figure which shows the other structural example of an insertion/removal unit. It is a figure which shows another example of an ultraviolet-ray leakage suppression part. It is a figure showing a cylindrical inner wall. It is a figure showing a partial body. It is a figure which shows the support body which has an arrangement hole. It is a figure which shows the upper end member which made the partial body fit into the arrangement hole. It is a perspective view showing an insertion/removal unit. FIG. 3 is a sectional view of a support into which a partial body is fitted in an inclined position. It is a figure showing the incidence of ultraviolet rays on a cylindrical inner wall. It is a figure showing the incidence of ultraviolet rays on a cylindrical inner wall. FIG. 3 is a cross-sectional view showing an enlarged partial body. FIG. 3 is a cross-sectional view showing an example of a support body including partial bodies arranged in multiple stages. FIG. 3 is a cross-sectional view showing a low reflection section formed in multiple layers.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, embodiments of a removable unit type toxicity target reduction device including an electromagnetic wave blocking filter of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the components of a removable unit type toxicity target reduction device 1. As shown in FIG. The unit insertion/removal type toxicity target reduction device 1 includes a main body forming a casing and an insertion/removal unit configured to be insertable into and removed from the inside of the main body. In addition, the removable unit type toxic substance reduction device 1 sucks fluid and internally reduces the toxic substances contained in the fluid (for example, decomposes, destroys, inactivates, and sterilizes (completely kills bacteria and viruses) etc.) and discharges the fluid.

Specifically, the unit insertion/removal type toxic target reduction device 1 includes, in addition to an insertion/removal unit 2 detachably housed in a main body 20, an ultraviolet light source 4 that is a reduction means for reducing toxic targets and irradiates ultraviolet rays. , an ultraviolet reflection section 6 that reflects ultraviolet rays, an ultraviolet leakage suppression section (electromagnetic wave blocking filter) 8 that suppresses leakage of ultraviolet rays, a flow generation section 10 that generates fluid flow, and a collection section that collects foreign matter contained in the fluid. 12, a power supply unit 14, an inlet 22 for fluid inflow, an outlet 24 for fluid discharge, and other functional components.
That is, the unit insertion/removal type toxicity target reduction device 1 is configured such that each of the functional components described above is appropriately arranged in either the insertion/removal unit 2 or the main body 20, and has the necessary functions comprehensively. All you have to do is do it.

Here, the functional components can be classified into replaceable components, which have a great advantage of belonging to the insertion/removal unit 2, and non-replaceable components, which have little merit of belonging to the insertion/removal unit 2. Replaceable components are assigned to the insertion/removal unit 2, and when replaced together with the insertion/removal unit 2, it is expected that maintenance efficiency will be greatly improved, such as improving work efficiency and shortening work time. Indicates a part (component). A non-replaceable component refers to a component (component) that can be attached to the insertion/removal unit 2 but is not expected to significantly improve maintainability. The replaceable components may include the ultraviolet light source 4, the ultraviolet reflection section 6, the ultraviolet leakage suppression section 8, the collection section 12, etc., and the non-exchangeable components include the flow generation section 10, the power supply unit 14, the inlet 22, There may be an air outlet 24 or the like. For example, the power supply unit 14 can be attached to the insertion/removal unit 2, but it can also be arranged in a replaceable manner on the main body side.In either case, there is almost no difference in maintainability, and such components are Classify as non-commutative components.

Here, the term "fluid" is a concept that includes gas, liquid, gel-like material, slurry-like material, powder, and the like. Toxic targets include pathogenic microorganisms such as bacteria and viruses, formaldehyde, sulfur dioxide gas, nitrite gas, odor components, volatile organic compounds (VOC), and total organic carbon (TOC) that contain harmful molecules. It is an object that is considered to be toxic or harmful to at least the human body and the environment, and moves with the fluid.

The insertion/removal unit 2 is configured to include at least an ultraviolet light source 4 among the above components. Therefore, when the insertion/removal unit 2 has only the ultraviolet light source 4, the other components are arranged on the main body 20 side, as shown in FIG. 2(a). That is, the main body 20 is configured such that the ultraviolet reflecting section 6, the ultraviolet leakage suppressing section 8, the flow generating section 10, the collecting section 12, the power supply unit 14, the inlet 22, the outlet 24, etc. are arranged.

Moreover, when the insertion/removal unit 2 has the ultraviolet light source 4 and the ultraviolet reflection part 6, as shown in FIG. It is configured to include a power supply unit 14, an inlet 22, an outlet 24, and the like.

Further, when the insertion/removal unit 2 includes the ultraviolet light source 4, the ultraviolet reflection section 6, the flow generation section 10, and the power supply unit 14, the main body 20 includes the ultraviolet leakage suppression section 8, the ultraviolet collection 12, an inlet 22, an outlet 24, and the like. Of course, the insertion/removal unit 2 is not limited to the above configuration, and may be configured as appropriate.

The ultraviolet light source 4 is, for example, a germicidal lamp, an ultraviolet lamp, an ultraviolet LED, or the like, and is arranged so as to irradiate the flow path of the fluid within the device with ultraviolet light. Further, the shape of the ultraviolet light source 4 can be appropriately set, for example, a straight tube shape, a U-shaped tube shape, a spiral shape, a spherical shape, a balloon shape, etc. Further, a plurality of ultraviolet light sources 4 may be arranged, and the location and number of the ultraviolet light sources 4 may be set as appropriate as long as they can irradiate at least the toxic object that has entered the apparatus with ultraviolet rays.

The ultraviolet light source 4 emits ultraviolet rays with a wavelength capable of decomposing, inactivating, disinfecting, sterilizing, sterilizing, etc. the toxic substance that is the target. The wavelength of such ultraviolet rays is preferably set to 200 to 300 nm, and more preferably set to around 250 to 270 nm. Of course, ultraviolet rays include near ultraviolet rays (UV-C) with wavelengths less than 250 nm, far ultraviolet rays (wavelengths 10 to 200 nm), extreme ultraviolet rays (wavelengths 10 to 121 nm), etc., as long as they can at least reduce the toxicity. It's okay. Further, near ultraviolet light (UV-A, UV-B) having a wavelength exceeding 300 nm may be used. Further, ultraviolet light sources 4 having different wavelength ranges may be used in combination.

The ultraviolet reflection section 6 is a planar member disposed to face the ultraviolet light source 4, and has an ultraviolet reflection layer on its surface. The ultraviolet reflective layer is made of an ultraviolet reflective material that can repeatedly reflect ultraviolet rays at a high level. The ultraviolet reflective material has a diffuse transmittance of 1%/1 mm or more and 20%/1 mm or less, and a total reflectance in the ultraviolet region of 60%/1 mm or more and 99.9%/1 mm or less, and has a diffuse transmittance. The sum of total reflectance in the ultraviolet region is preferably 90%/1 mm or more. Examples of such ultraviolet reflective materials include silver materials, aluminum materials, polytetrafluoroethylene PTFE, silicone resin, quartz glass containing air bubbles of 0.05 μm to 10 μm inside, and quartz glass containing bubbles of 0.05 μm to 10 μm inside. Partially crystallized quartz glass containing the following crystal grains, alumina sintered bodies with crystal grains of 0.05 μm or more and 10 μm or less, mullite sintered bodies with crystal grains of 0.05 μm or more and 10 μm or less, magnesium carbonate, barium, etc. There may be one containing at least one of the following.

Further, the ultraviolet reflecting part 6 can be formed by attaching an ultraviolet reflective material to the surface of an appropriate base material such as metal (silver, aluminum, nickel, copper, etc.) by vapor deposition, sputtering, etc., and includes a fluid flow path. It is arranged so that the ultraviolet rays from the ultraviolet light source 4 are reflected at the top.
Further, when a silver material or an aluminum material is used for the ultraviolet reflecting portion 6, a protective layer functioning as a coating may be applied to the surface in order to prevent surface oxidation and sulfidation. In this case, the protective layer can be made of a material that does not reduce the reflectance of ultraviolet rays as much as possible, such as acrylic resin, quartz glass, PTFE, or the like. Note that methods for forming the protective layer with PTFE include vapor deposition, sputtering, and the like.

Furthermore, the ultraviolet reflecting section 6 may be formed by forming multiple layers of thin films. For example, by stacking a thin film of metal, a thin film of an alloy whose main component is metal, a film of oxide (for example, aluminum oxide, silicon oxide, titanium oxide, zirconium oxide, etc.) to form a multilayer structure, the ultraviolet reflecting portion 11 can be formed. The thickness of the film per layer is set, for example, to an integral multiple of 1/4 of the wavelength of ultraviolet rays (that is, an odd or even multiple of 1/4 of the wavelength). Specifically, if the wavelength of the main ultraviolet rays to be reflected is set to 253.7 (nm), the thickness of one layer may be 63.4 (nm), 126.8 (nm), 190.3 (nm), etc. can do. Of course, the film thickness per layer can be set as appropriate, and may be a so-called thick film with a thickness of several tens of micrometers, a so-called thin film with a thickness of several micrometers, or a so-called ultra-thin film with a thickness of several nanometers or less. There may be. Further, when forming a multilayer film, layers having different refractive indexes and/or dielectric constants may be formed alternately while the base material surface is previously made into a mirror-like state.

The ultraviolet leakage suppressing section 8 has a structure that suppresses the passage of light while ensuring a gap through which fluid can pass. For example, it can be constructed with a louver made of a plurality of blades arranged side by side, a honeycomb structure that blocks light, etc. so as to restrict the passage of ultraviolet rays. The arrangement of the ultraviolet leakage suppressing section 8 can be set as appropriate, and may be placed, for example, at a fluid inlet or outlet in the device, or inside the device. Further, it goes without saying that a plurality of ultraviolet leakage suppressing parts 8 may be arranged.

The flow generator 10 includes one or more fans, one or more motors, and the like. The type, shape, etc. of the fan of the flow generating section 10 are not particularly limited, and examples thereof include an axial fan (propeller fan), a mixed flow fan, a centrifugal fan (multi-blade fan, sirocco fan, radial fan, and plate fan). , turbo fan, limit load fan, airfoil fan, etc.), centrifugal axial fan, vortex fan, cross flow fan (cross flow fan, etc.), etc.

The collection unit 12 is disposed at or near the fluid intake port of the device in order to prevent foreign matter in the fluid from entering the device. Further, the collection section 12 is arranged to be removable so that it can be replaced when it becomes clogged.

The power supply unit 14 can be a primary battery such as an AA battery or a AAA battery, or a rechargeable secondary battery such as a lithium ion battery, and is used to supply external power from a commercial power system to each part. It may also include a circuit board, etc.

The main body 20 can have a box shape, a polyhedral shape, a pyramid shape, a frustum shape, a columnar shape (cylindrical column, prismatic column, etc.), etc., and can be opened and closed on the front, back, side, top, and/or bottom, and can be inserted. The detachable unit 2 is configured to be insertable and detachable. The main body 20 also has an inlet 22 through which fluid can flow, and an outlet 24 through which fluid can be discharged.
The main body 20 also has an internal space in which the insertion/removal unit 2, ultraviolet light source 4, ultraviolet reflection section 6, ultraviolet leakage suppression section 8, flow generation section 10, collection section 12, power supply unit 14, etc. are arranged. be done. Furthermore, the internal space of the main body 20 also functions as a flow path through which fluid passes between the inlet 22 and the outlet 24.

Next, regarding an example of the unit removable type toxic target reducing device of the present invention which is installed indoors and reduces toxic targets in the air, a perspective view showing the unit insertable and removable type toxic target reducing device 1 of FIG. Explain with reference to. The main body 20 has a substantially cylindrical shape, and includes an inlet 22 on one end surface and an outlet 24 on the outer peripheral surface near the other end.
Note that the shape of the main body 20 is not limited to this, and the positions of the inlet 22 and outlet 24 are also not limited to this, with the inlet 22 at the bottom and the outlet 24 at the top. It can be set as appropriate, such as being an end face.

The positions of the inlet 22 and the outlet 24 in the main body 20 are set so that the inlet 22 faces upward and the outlet 24 is located at the bottom. Moreover, the upper end portion 26 of the main body 20 is provided in a separable manner. Further, it is assumed that the suction port 22 is formed at the upper end portion 26.
When the upper end portion 26 of the main body 20 is separated as shown in FIG. 4, an internal space 28 for accommodating the insertion/removal unit 2 is exposed. Further, the main body 20 defining the internal space 28 has a fitting portion 42 (described later) of a holder 40 of the insertion/removal unit 2 fitted on the inner peripheral surface thereof, and a fitted portion that guides insertion of the insertion/removal unit 2. 30 will be installed. The fitted portion 30 has a concave cross section by recessing the inner peripheral surface of the main body 20, and is formed to extend in the axial direction.

Here, FIG. 5 shows the insertion/removal unit 2, (a) is a perspective view, (b) is a side view, FIG. 6 is an AA sectional view showing the insertion/removal unit 2, and FIG. 7 is a perspective view of the insertion/removal unit 2. It is a BB sectional view shown. The insertion/removal unit 2 includes an ultraviolet light source 4, an ultraviolet reflection section 6, and an ultraviolet leakage suppressing section 8. That is, the insertion/removal unit 2 has a holder 40 having a frame structure capable of holding the ultraviolet light source 4 in the shape of a straight tube.

The holder 40 has a substantially cylindrical shape with both ends open, and an upper end member 44 having an ultraviolet leakage suppressing portion 8 formed at the upper end (one end) is separably fixed. Note that a grip portion 44a is formed on the surface of the upper end member 44. The grip portion 44a is exposed so that it can be gripped when the upper end portion 26 is separated from the main body 20. Therefore, the holding body 40 can be lifted up by gripping the gripping portion 44a and can be pulled out from the main body 20.
A lower end member 46 is formed at the lower part (the other end) of the holder 40 and is capable of supporting the ultraviolet light source 4 and is provided with a contact terminal and the like for connecting the ultraviolet light source 4 and the power supply unit 14 in a energized manner. Ru.

The holder 40 has an ultraviolet reflecting section 6 formed on its inner peripheral surface, and the ultraviolet reflecting section 6 surrounds the ultraviolet light source 4 arranged inside. As shown in FIG. 7, the holder 40 has a plurality of (four) ultraviolet light sources 4 arranged in parallel at the center of the cross section in the axis orthogonal direction. Therefore, in the internal space of the holder 40, ultraviolet rays emitted from the ultraviolet light source 4 in a direction substantially perpendicular to the axis are reflected at a high level by the ultraviolet reflecting section 6. As a result, a space with a high dose of ultraviolet light is formed in the internal space of the holder 40.
A fitting portion 42 that protrudes radially outward and extends in the axial direction is disposed on the outer circumferential surface of the holding body 40 .

The ultraviolet leakage suppressing part 8, which is a part of the upper end member 44, has louvers 8a and 8b with blades oriented in different directions, and is arranged in an overlapping manner in the axial direction of the holder 40. The louvers 8a and 8b are arranged so that the directions of their blades are different from each other so that the direction of ultraviolet light that can pass through one louver 8a is different from the direction of ultraviolet light that can pass through the other louver 8b. This allows air to flow between the louvers 8a and 8b, while suppressing the passage of ultraviolet rays.

As shown in FIG. 8, the lower end member 46 has an opening to maintain breathability. The lower end member 46 also includes a connection lamp socket (not shown) that holds the ultraviolet light source 4, a contact terminal 48 connected to a terminal of the lamp socket, and the like. The contact terminal 48 is exposed on the surface facing the lower end of the main body 20, and can be connected to the power supply unit 14, which will be described later, when the insertion/removal unit 2 is inserted into the main body 20. Note that the contact terminal 48 may have an appropriate shape, and may be in the shape of a leaf spring, for example, so that the contact terminal 48 is brought into contact with the terminal disposed on the main body 20 side so as to be constantly biased. Note that an ultraviolet leakage suppressing portion may be provided in the opening of the lower end member 46. In this way, leakage of ultraviolet rays from both ends of the holder 40 can be suppressed.

FIG. 9 is a cross-sectional view showing the unit insertion/removal type toxicity target reduction device 1. Inside the main body 20 and below the insertion/removal unit 2, a flow generating section 10 and a power supply unit 14 are arranged. A collection section 12 is arranged above the unit 2. Specifically, the fan of the flow generating section 10 is disposed below the lower end member 46, and the power supply unit 14 is disposed further below the flow generating section 10.

Note that the flow generation section 10 and the power supply unit 14 may be positioned above the insertion/removal unit 2, but if the unit insertion/removal type toxicity target reduction device 1 is installed vertically, the flow generation section 10 and/or It is desirable to locate the power supply unit 14 on the bottom side and set the center of gravity at the bottom of the device to improve the stability of the posture.

The collection unit 12 collects dust in the air, so for example, a coarse dust filter that mainly collects particles of 50 μm or more, a medium-high performance filter (MEPA filter) that mainly collects particles of 25 μm or more, etc. , a HEPA filter that collects particles of 0.3 μm, and a ULPA filter that collects particles of 0.15 μm.

Furthermore, although the collecting portion 12 is fixed to the back side of the upper end portion 26, the present invention is not limited thereto, and it may be placed at a location where foreign matter can be prevented from entering the holding body 40, for example, It may be placed on the upper end member 44.

In the removable unit type toxicity target reduction device 1, when the fan 30a of the flow generator 30 rotates, outside air flows into the removable unit 2 through the suction port 22 and flows down toward the air outlet 24. Flow along the flow path occurs so that it can be discharged. Moreover, the ultraviolet rays irradiated from the ultraviolet light source 4 are reflected multiple times (high order reflection) within the holder 40 by the ultraviolet reflection section 6, creating an extremely high dose ultraviolet radiation region. Therefore, toxic substances in the air flowing down inside the insertion/removal unit 2 are exposed to high doses of ultraviolet rays and are reduced.

Here, FIG. 10 is a diagram showing the insertion/removal unit 2 housed in the main body 20. The insertion/removal unit 2 in the unit insertion/removal type toxicity target reduction device 1 is performed with the interior of the main body 20 open. That is, by removing the upper end portion 26 of the main body 20, the inner accommodation space is opened so that the insertion/removal unit 2 can be accommodated.

The insertion/removal unit 2 is inserted into the main body 20. That is, the insertion/removal unit 2 is aligned with the main body 20 so that the fitting part 42 of the holder 40 fits into the fitted part 30, and is moved along the arrow shown in FIG. 8(a). It is inserted into the main body 20 from above.

The insertion/removal unit 2 is housed in the main body 20 as shown in FIG. 10(b) when the fitting part 42 is inserted into the fitted part 30 and slid to the innermost part of the main body 20. After the insertion/removal unit 2 is accommodated, the upper end portion 26 is attached to the main body 20 to complete the insertion/removal unit 2.

Furthermore, when the insertion/removal unit 2 is removed, the upper end portion 26 is separated from the main body 20. As a result, the upper part of the insertion/removal unit 2 is opened. Therefore, by grasping and lifting the grip portion 44a of the insertion/removal unit 2, the insertion/removal unit 2 is removed from the main body 20, and the removal of the insertion/removal unit 2 from the main body 20 is completed.

As explained above, by configuring the insertion/removal unit 2 including the ultraviolet light source etc. to be removable from the main body 20, it is possible to use the existing insertion/removal unit when performing maintenance work on the ultraviolet light source etc. The work can be completed by removing the unit and inserting a new insertion/removal unit. In other words, maintenance and maintenance work can be completed by simply replacing the insertion/removal unit, resulting in a significant reduction in work time and a dramatic improvement in work efficiency, significantly improving the ease and stability of work. can be improved.

Note that the opening shape and form of the suction port 22 are not limited as long as they can suck in at least the air above and around the main body 20. Further, an inlet may be provided with an enlarged opening so that air can be sucked in from a wide area. Alternatively, a nozzle that sucks air from one direction may be provided, and the shape of the suction port 22 is set so that it narrows along the nozzle shape and the flow direction, and the sucked air is turned into a jet inside the device and placed in the fluid flow path. You can also let it flow down. Of course, a nozzle or suction port whose cross-sectional area of the flow path expands along the fluid flow direction may be provided to reduce the flow velocity of the sucked fluid. Further, the suction port 22 may be provided with an opening/closing body such as a shutter or a lid that can open and close the opening, so that the suction port 22 can be adjusted to a desired opening amount.
Further, the direction in which the fluid flows in through the suction port 22 may be along the axial direction of the main body 20, a direction inclined to the axial direction (including a direction perpendicular to the axis), or the like.

Further, the air outlet 24 is configured by arranging a plurality of slit-shaped holes provided in the main body 20 at approximately predetermined intervals over the entire circumference. That is, the air outlet 24 discharges air from a plurality of directions toward the periphery of the removable unit type toxic target reduction device 1.
The total opening area of the air outlet 24 (total opening area obtained by adding up the opening area of each hole) can also be set larger than the opening area of the suction port 22. By setting the opening area in this way, the flow rate of the fluid discharged from the blower outlet 24 can be lowered compared to the flow rate of the fluid flowing in through the suction port 22. This makes it possible to quickly and forcefully suction the toxic substance contained in the air through the inlet 22, while slowly and gently discharging the air from the outlet 24. . This makes it possible to exhaust the air without disturbing the surrounding air, which contains toxic objects such as floating viruses.

Furthermore, when the removable unit type toxic target reduction device 1 is installed and used indoors, the suction port 22 can preferentially suck in air (and toxic targets) from the upper and surrounding areas of the device. Therefore, the inlet 22 should be located at a position corresponding to a height where human exhalation or air containing exhaled air is likely to remain, or in a spatial area below the height where human exhalation or air containing exhaled air is likely to remain. is preferred. For example, the inlet port 22 is placed near the height of the respiratory organs such as the oral cavity and nasal cavity (e.g., a position approximately 70 to 180 cm from the ground) where exhaled air and exhaust gas from a person in an upright or sitting position tend to accumulate. It is preferable to do so. It goes without saying that the suction port 22 may be located at a height of less than 70 cm from the ground or at a height of 180 cm or more.

Further, it goes without saying that the collection section 12 may be provided at a location other than the vicinity of the suction port 22, or may be arranged at a plurality of locations. For example, the collection section 12 can be provided near the inlet 22 and near the outlet 24.
It is preferable that the collection part 12 is removably disposed so that it can be easily replaced when it becomes clogged. For example, the collection section 12 may be provided in a detachable manner with respect to the insertion/removal unit 2. In this way, the collection section 12 can be taken out together with the insertion/removal unit 2, or only the collection section 12 can be replaced while the insertion/removal unit 2 remains in the device 1.

Further, as described above, the components constituting the insertion/removal unit 2 can be set appropriately, so that, for example, the insertion/removal unit 2 has a flow generating section 10 located below the ultraviolet light source 4 in the holder 40 as shown in FIG. and a power supply unit 14 may be arranged.

Among the multiple parts (components) that greatly affect the function and performance of the unit-removable toxicity target reduction device 1, parts that require replacement or cleaning, etc. frequently are assembled into the removable-unit unit 2 by incorporating them. This makes on-site maintenance work easier. That is, maintenance can be completed with only the work of removing and replacing the insertion/removal unit 2, and the time required for the work can be shortened and simplified.
Furthermore, the effects of removable unit toxicity are reduced, such as deterioration of the ultraviolet light source, contamination or performance deterioration of the ultraviolet reflection part, damage to the ultraviolet leakage control part or blockage by foreign objects, contamination or clogging of the collection part, failure of the flow generation part, etc. When a malfunction or defect occurs that causes deterioration in the function or performance of the eraser device 1 or malfunction, it is easier to use a spare insertion/removal unit than to remove each component individually for cleaning, repair, or replacement. Since the maintenance work can be completed on-site simply by replacing the unit, the time during which the unit removable toxic target reduction device 1 is not in operation can be significantly shortened.

In addition, when the detachable unit type toxicity target reduction device of the present invention is used for the purpose of inactivating and sterilizing pathogenic microorganisms in the air by taking in the surrounding air, it can be used, for example, at hospitals, clinics, medical checkups, etc. , research facilities, offices, conference rooms, restaurants, showrooms, libraries, schools, kindergartens, nursery schools, shops, entertainment facilities (karaoke boxes, aquariums, planetariums, movie theaters, art museums, museums, bowling alleys, etc.), vehicles (cars, It can be installed in spaces where people gather, such as airplanes, ships, trains, etc., or spaces where people tend to be crowded.

Furthermore, the removable unit type toxicity target reduction device of the present invention can be used by being mounted on, embedded in, incorporated into, or combined with various devices and instruments. Such devices and appliances include, for example, air conditioners, electric fans, circulators, air purifiers, humidifiers, dehumidifiers, ventilation fans, vacuum cleaners, circulation pumps, mist showers (spreaders), exhaust equipment, plants, septic tanks, ducts, It can be used for all types of things having a flow path structure that allows fluid to flow, such as piping and connecting members that connect piping to each other.
In addition, if air flow can be ensured, for example, it can be embedded in the roof of a vehicle, the backrest of a seat, a seat headrest, a dashboard, an instrument panel, a control panel, a table, a desk, a chair, a wall, a ceiling, an elevator, etc. It is also possible to use In particular, it can be used by being embedded in a structure that is installed or existing in the above-mentioned space where people gather or where people tend to be crowded, or a member forming a part of the structure.

In addition, although the explanation has been given using an example where a toxic target is reduced by ultraviolet rays, the present invention is not limited to this. It may also be one that emits waves other than ultraviolet rays, such as rays and/or γ rays. In addition, a heating means that heats the inside of the flow path to an extent that can further reduce toxic targets, a local micro-discharge phenomenon, and a pair of oppositely arranged positive and negative electrodes are used to attach toxic targets (particularly pathogenic microorganisms) to the electrodes. An electric field generating means may be provided that can create an electric field in the flow path to adsorb toxic substances and reduce or eliminate toxic substances. Of course, instead of the ultraviolet light source, a heating means and/or an electric field generating means may be provided to reduce the toxic target.

In addition, when the ultraviolet leakage suppressing part 8 has a structure having a cylindrical inner wall assembly consisting of a plurality of cylindrical inner walls, for example, a honeycomb structure, as shown in FIG. An ultraviolet leakage suppressing section (cylindrical inner wall assembly) 8 can be provided, which is made of a cylindrical inner wall 60. The size of each cylindrical inner wall 60 can be set as appropriate. For example, the width d between a pair of opposing surfaces shown in FIG. 13 is 3.2 mm, 4.8 mm, 6.4 mm, 9.5 mm, 12. It can be set to 7 mm, 15.9 mm, 19.1 mm, 25.4 mm, etc. Of course, the width d may be less than 3.2 mm or longer than 25.4 mm. Further, the thickness (foil thickness) t of the cylindrical inner wall 60 may be 50 μm, 76 μm, etc., and of course may be set to other thicknesses.
Further, the ultraviolet leakage suppressing portion 8 can be formed of resin, metal, rubber, ceramic, or a composite material thereof, such as stainless steel, titanium, aluminum, or an alloy thereof as a UV-resistant material, or other silicone. It can be formed from resin, urea resin, or the like.

The ultraviolet leakage suppressing section 8 is not limited to being formed by a single cylindrical inner wall assembly as shown in FIG. 12, but may be formed by combining a plurality of partial bodies. For example, the ultraviolet leakage suppressing portion 8 may be formed by combining a plurality of partial bodies 50 formed by arranging a plurality of substantially arc-shaped cylindrical inner walls shown in FIG.

In that case, an upper end member 44 or the like having a support body 52 with an arrangement hole 54 formed inside as shown in FIG. 15 is used. A plurality of arrangement holes 54 can also be arranged at approximately equal intervals along the circumferential direction inside the support body 52. Moreover, the shape and size of each arrangement hole 54 are set so that the partial body 50 can be fitted therein.

Therefore, as shown in FIG. 16, by fitting the partial bodies 50 into the respective installation holes 54 of the support body 52, the upper end member 44 including the ultraviolet leakage suppressing portion 8 can be formed. As a result, a holder 40 having an upper end member 44 as shown in FIG. 17 can be constructed.

The cross-sectional shape of the hole surrounded by the cylindrical inner wall of the ultraviolet leakage suppressing portion 8 (the cross-sectional shape of the hole perpendicular to the direction in which the hole extends) is approximately triangular, approximately quadrangular, approximately pentagonal, approximately heptagonal, approximately octagonal, etc. In addition to polygons, it can be configured with any suitable shape such as a substantially circular shape, a substantially elliptical shape, or a combination thereof.
Further, it is also possible to provide an ultraviolet leakage suppressing portion 8 including a cylindrical inner wall having a plurality of hole shapes. For example, in a plurality of partial bodies 50 fitted to the support body 52, the cross-sectional shape of the cylindrical inner wall may be made different for each partial body 50.

The inner surface of the cylindrical inner wall 60 is provided with a low reflection part whose reflectance of ultraviolet rays is below a predetermined value. Low-reflection areas can be treated with plating (hot-dip plating, vacuum plating, electroless plating, electrolytic plating, etc.), anodizing, or resin painting (acrylic paint, pure acrylic paint) to prevent UV reflection or absorb UV rays. , urethane paint, silicone paint, fluorine paint, inorganic paint), etc. In particular, by providing a cylindrical inner wall surface with a large number of fine uneven structures or dendrite structures, it is possible to construct an extremely low reflectance surface. In addition, when black surface treatment is used, the cylindrical inner wall 60 absorbs ultraviolet rays to further improve the antireflection effect of ultraviolet rays.

Examples of the thin film metal that coats the cylindrical inner wall 60 by plating include chromium, nickel, chromate, tin, zinc, aluminum, iron, gold, silver, copper, titanium, and alloys thereof, and are not particularly limited. It's not a thing.

Further, black surface treatments include black dyeing using an alkali coloring method, sulfide treatment, chemical conversion treatment such as black chromate, and dyeing of alumite film. Examples of methods using electrolysis include black electrolytic chrome plating, black electrolytic nickel plating, black electrolytic tin alloy plating, and black electrodeposition coating. Further, black film formation using an electroless plating method includes, for example, black electroless nickel plating, and there are two methods: one in which a black film is obtained in the state of electroless nickel plating, and the other in which a black film is obtained by oxidation treatment.
Methods for obtaining a black film in the state of electroless nickel plating include black electroless nickel-phosphorus-zinc alloy plating, black electroless pure nickel plating using hydrazine as a reducing agent, and black electroless Ni--Sn plating.
Methods for obtaining a black film through oxidation treatment include immersion in nitric acid, hydrochloric acid, sulfuric acid, persulfuric acid, hydrogen peroxide, or a mixture of these after electroless nickel plating, or immersion in ferric chloride or cupric chloride. There are methods such as immersion in an acidic solution and anodic electrolysis in a permanganate solution.

The phosphorus content of black electroless nickel plating is not particularly limited, and can be set as appropriate in the range of about 1 to 13%, for example, depending on corrosion resistance, abrasion resistance, hardness, etc. Electroless nickel plating with a lower phosphorus content (1 to 4%) can provide better wear resistance and hardness, but less corrosion resistance. On the other hand, electroless nickel plating with a higher phosphorus content (9 to 13%) has poorer wear resistance and hardness, but can provide better corrosion resistance.

The low-reflection portion formed by such black surface treatment has minute irregularities on its surface, and the recessed portions absorb ultraviolet rays, reducing reflectance. When the low reflection part is formed by black electroless nickel plating, a plurality of dendrites can be formed on the surface. Here, dendritic refers to a shape in which metal elements are coarsely deposited and grow in a tree-like manner. Therefore, the low-reflection portion has a complex three-dimensional surface due to the dendrites, and scatters and reflects incident ultraviolet rays into the interior thereof, as well as absorbs the ultraviolet rays. In addition, according to the black electroless nickel plating, it is possible to form a low reflection part with a film thickness of 1 to 5 μm and a reflectance of ultraviolet rays of less than 2%.
The resin paint used to coat the cylindrical inner wall 60 is preferably a silicone resin paint that contains a black pigment that is resistant to ultraviolet rays and absorbs light. It is more preferable that the surface is formed to have an uneven structure so as to diffuse reflection.
The silicone resin paint described above can form an ultra-low reflective area with a film thickness of 1 to 20 μm and a reflectance of 0.3% or less in the ultraviolet region (200 to 400 nm).

Furthermore, a low-reflection area may be provided by pasting a PET (polyethylene terephthalate), PP (polypropylene), PVC (polyvinyl chloride) film, etc. on the surface of the cylindrical inner wall; It may be pasted over the other parts.

Further, the direction in which the hole formed by the cylindrical inner wall of the ultraviolet leakage suppressing part 8 provided in the holding body 40 extends is not only the thickness direction of the ultraviolet leakage suppressing part 8 or the direction parallel to the axial direction of the holding body 40 but also the axial direction. It may also be in a direction tilted with respect to. For example, the direction in which the cylindrical inner wall extends is set so that it is inclined toward the axis from the inside to the outside of the holder 40, and the direction in which the cylindrical inner wall extends is set so that it is inclined from the inside to the outside of the holder 40 toward the opposite axis. The direction in which the inner wall extends can be set.

FIG. 18 is a cross-sectional view of the support body 52 into which the partial body 50 is fitted in an inclined position, in which the axis b of the cylindrical inner wall of the partial body 50 is directed from the inside of the holder toward the outside of the holder 40 ( The partial body 50 can be held in an inclined position by the arrangement hole 54 of the support body 52 so as to be tilted toward the axis a (not shown).

Note that the low-reflection portion of the cylindrical inner wall is not limited to the purpose of preventing reflection or absorbing ultraviolet rays, but may also be used for preventing reflection or absorbing electromagnetic waves. In this case, electromagnetic waves include gamma rays. , X-rays, ultraviolet rays, visible light, infrared rays, radio waves, microwaves, very short waves, short waves, medium waves, long waves, very long waves, extremely long waves, etc.
As described above, when the ultraviolet leakage suppressing section (electromagnetic wave blocking filter) having the cylindrical inner wall assembly is provided, the ultraviolet rays can be blocked by the cylindrical inner wall and can be prevented from leaking to the outside. Further, since the inner side of the cylindrical inner wall has holes, the cylindrical inner wall does not impede the flow of air, and the flow velocity of the air is hardly reduced.

The size of the cylindrical inner wall 60 (width d, length along the axial direction, etc.) is set to a size that can reflect and absorb at least the ultraviolet light emitted from the ultraviolet light source 4 until it is reliably blocked or sufficiently reduced. do. Therefore, it can be set depending on, for example, the distance and angle from the cylindrical inner wall 60 to the ultraviolet light source 4, the length of the ultraviolet light source 4 (ultraviolet lamp tube length), and the like.

In that case, assume the possible incidence of ultraviolet rays that go directly from the ultraviolet light source 4 to the ultraviolet leakage suppressing section 8, and the possible incidence of ultraviolet rays that are reflected from the ultraviolet light source 4 and go toward the ultraviolet leakage suppressing section 8 after being reflected by the ultraviolet reflecting section 6. , the size of the cylindrical inner wall 60 is determined so that the ultraviolet rays do not directly pass outside the leakage suppressing part 8. Specifically, when the ultraviolet light source 4 shown in FIG. 19 is shaped like an ultraviolet lamp, it is assumed that among the ultraviolet rays emitted from the ultraviolet light source 4, the ultraviolet rays have an incident angle as close to parallel to the axis of the cylindrical inner wall 60 as possible. The dimensions and specifications of each part are set so that the ultraviolet rays are blocked by the cylindrical inner wall 60.
At this time, radiation is emitted from one end 4a of the ultraviolet light source 4 (the end located on the opposite side of the ultraviolet leakage suppressing part 8) toward the cylindrical inner wall 60A of the ultraviolet leakage suppressing part 8 located near the ultraviolet light source 4. Assuming ultraviolet rays. Here, the distance from the one end 4a to the ultraviolet leakage suppressing part 8 is approximately 425 (mm), and the distance from the surface of the ultraviolet light source 4 to the cylindrical inner wall 60A in the direction perpendicular to the axis of the ultraviolet light source 4 is approximately 92 (mm). mm), the ultraviolet rays directed from the one end 4a toward the cylindrical inner wall 60A are incident at an angle of about 4 to 5 degrees with respect to the axis of the ultraviolet light source 4.
Similarly, among the ultraviolet rays reflected from the one end 4a by the ultraviolet reflecting part 6, the ultraviolet rays enter the ultraviolet ray reflecting part 6 at an incident angle as close as possible to the axis of the cylindrical inner wall 60, and the ultraviolet rays reflected there are reflected on the cylindrical inner wall 60. Set the dimensions and specifications of each part so that they are blocked by In this case, as shown by the reflected light line in FIG. 19, it is assumed that ultraviolet rays are reflected from the one end 4a by the ultraviolet reflecting part 6 and enter the cylindrical inner wall 60B located on the radially outer side of the ultraviolet leakage suppressing part 8. The dimensions and specifications of each part are set so as to block the ultraviolet rays incident on the cylindrical inner walls 60A and 60B, respectively.

When the size of the cylindrical inner wall 60 is increased, the space inside the cylindrical inner wall 60 expands, and as a result, the ultraviolet rays incident on the cylindrical inner wall 60 hit near the exit side near the outside of the cylindrical inner wall 60. It is possible to prevent clogging due to foreign matter such as accumulation of dust within the chamber 60, and improve ventilation.

On the other hand, when the size of the cylindrical inner wall 60 is reduced, the space inside the cylindrical inner wall 60 is narrowed, and the ultraviolet rays incident on the cylindrical inner wall 60 hit the vicinity of the entrance side of the cylindrical inner wall 60 near the ultraviolet light source 4. As a result, ultraviolet rays are repeatedly reflected and absorbed within the cylindrical inner wall 60, and the dose of ultraviolet rays can be reduced to a value as close to zero as possible. That is, when ultraviolet rays hit the low reflection portion of the cylindrical inner wall 60, they are reflected and absorbed, and there is a distance from the position where the ultraviolet rays hit to the exit side of the cylindrical inner wall 60, so the number of times the ultraviolet rays are reflected increases. The amount of ultraviolet rays can be reduced by repeating reflection and absorption accordingly.

As mentioned above, the low reflection part made of black electroless nickel plating has the ability to reduce the reflectance to less than 2%, but if the reflectance of ultraviolet rays is set to 2%, the amount of ultraviolet rays emitted from the ultraviolet light source 4 By once reflecting X (J/cm ² ) at the low reflection portion, the amount of ultraviolet rays is reduced to 0.02 times. Therefore, the amount _of ultraviolet rays X _n when the ultraviolet rays are reflected ⁿ times within the cylindrical inner wall 60 can be calculated using the formula: It is clear that the amount of UV radiation is significantly reduced.

As the length of the cylindrical inner wall 60 in the axial direction is extended, the dose of ultraviolet rays can be reduced to a greater extent. That is, by extending the inner circumferential surface of the cylindrical inner wall 60 along the axial direction, the distance between the position on the cylindrical inner wall 60 that is exposed to ultraviolet rays and the innermost part of the cylindrical inner wall 60 is extended. Therefore, the number of times that ultraviolet rays are reflected and absorbed within the cylindrical inner wall 60 increases, and the amount of ultraviolet rays can be further reduced.

In addition, although the size setting of the cylindrical inner wall 60 has been explained above so as to reliably block ultraviolet rays or reflect and absorb them until they are sufficiently reduced, in addition to this, as shown in FIG. The dose of ultraviolet rays can also be further reduced by arranging the body 50) at an angle within the support body 52.
Here, FIG. 21 is an enlarged cross-sectional view showing the partial body 50, and in the cylindrical inner wall 60 such as the cylindrical inner wall 60A into which the ultraviolet rays directly enter from the one end 4a, the position where the incident ultraviolet rays hit is further toward the entrance side. Therefore, reflection and absorption of ultraviolet rays on the cylindrical inner wall 60 are further repeated, and the dose of ultraviolet rays can be further reduced.

Note that depending on the inclination direction of the partial body 50, the ultraviolet rays along the reflected light line may pass through the cylindrical inner wall 60B. Therefore, when the partial body 50 is disposed in an inclined position, the inclination angle at which the partial body 50 is installed is set so as to be in a position that reliably blocks the ultraviolet rays of the reflected light line. In FIG. 21, the partial body 50 is arranged at an angle of approximately 3 degrees from the vertical angle, but it may of course be tilted at an angle of less than 3 degrees or more than 3 degrees.

Note that a plurality of cylindrical inner wall assemblies may be stacked in multiple stages along the axial direction to form a multi-stage structure. For example, as shown in FIG. 22, the ultraviolet leakage suppressing portion 8 may be provided by arranging the partial bodies 50 in two stages in the supporting body 52, one over the other in the axial direction. As a result, the number of times the ultraviolet rays incident on the cylindrical inner wall assembly are reflected and absorbed before reaching the outside where the axial length of the cylindrical inner wall 60 is extended can be increased.
Of course, it goes without saying that the number of stages of the partial bodies 50 may be two or more. In that case, the dimensions, specifications, etc. of the cylindrical inner wall for each stage may be the same or different.

Moreover, the partial bodies 50 forming each stage may have a low reflection part that blocks electromagnetic waves of different wavelengths. For example, the partial bodies 50 may be made of different materials and/or with different surface treatments. The ultraviolet leakage suppressing section 8 may be configured by stacking a partial body 50 for blocking ultraviolet rays, a partial body 50 for blocking visible light, a partial body 50 for blocking radio waves, and the like.
It goes without saying that the partial body 50 may also be disposed on the lower end member 46 to suppress leakage of ultraviolet rays.

Additionally, the low reflection portion may be configured in a multilayered manner. In this case, layers are stacked to form a multilayer structure such that the wavelength of the electromagnetic waves to be attenuated gradually increases from the surface layer side toward the base material (cylindrical inner wall) side. For example, in the enlarged view of the surface of the cylindrical inner wall shown in FIG. 23, there is a long-wave attenuation layer 102 on the base material side 100 that has a property of attenuating electromagnetic waves with longer wavelengths, and a wavelength longer than the electromagnetic waves attenuated by the long-wave attenuation layer 102. A medium wave attenuating layer 104 having an attenuating property for electromagnetic waves having a short wavelength, and a short wave attenuating layer 106 having an attenuating property for electromagnetic waves having a short wavelength are arranged in this order. According to such a multilayered low reflection section, electromagnetic waves first enter the short wavelength attenuation layer 106. The electromagnetic waves that are not attenuated by the short wavelength attenuation layer 106 can be transmitted through the short wavelength attenuation layer 106 and attenuated by the medium wavelength attenuation layer 104 . The electromagnetic waves that are not attenuated by the medium wavelength attenuation layer 104 can be transmitted through the medium wavelength attenuation layer 104 and attenuated by the long wavelength attenuation layer 102 .

Each layer can be formed by an appropriate method such as thermal spraying, hot-dip plating, dry plating, dry painting, wet plating, or wet painting. Here, thermal spraying may include, for example, flame spraying, electric thermal spraying (eg, plasma spraying, arc spraying, etc.), cold spraying, and the like. Dry plating can include PVD methods (eg, vacuum evaporation, ion plating, sputtering, etc.) and CVD methods (thermal CVD, plasma CVD, etc.). Dry coating may include powder coating, solvent coating, and the like. Wet plating may include electroplating and electroless plating. Wet coatings can include electrodeposition coatings and water-based coatings.

DESCRIPTION OF SYMBOLS 1... Unit insertion/removal type toxicity target reduction device, 2... Insertion/removal unit, 4... Ultraviolet light source, 6... Ultraviolet light reflecting section, 8... Ultraviolet leakage suppressing section, 10... Flow generation section, 12... Collection section, 14... Power supply unit, 20...main body, 22...intake port, 24...outlet, 40...holding body, 42...fitting part, 44...upper end member, 46...lower end member, 50...partial body, 52...support body, 60... Cylindrical inner wall.

Claims (9)

1. a cylindrical inner wall assembly consisting of a plurality of parallel cylindrical inner walls that partition a space inside the support;
   a low reflection part provided on the surface of the cylindrical inner wall and having a reflectance of electromagnetic waves of a predetermined value or less;
   An electromagnetic wave blocking filter characterized in that the cylindrical inner wall assembly blocks electromagnetic waves.
2. The electromagnetic wave blocking filter according to claim 1, wherein the cylindrical inner wall assembly is arranged in a direction in which the axis of the cylindrical inner wall is inclined with respect to the axis of the support.
3. The cylindrical inner wall assembly is provided so as to be fit into the support, and the cylindrical inner wall is supported by the support in an attitude inclined with respect to the axis of the support. The electromagnetic wave blocking filter according to item 1.
4. The electromagnetic wave blocking filter according to claim 1, wherein the support supports a plurality of the cylindrical inner wall aggregates.
5. The electromagnetic wave blocking filter according to claim 1, wherein the cylindrical inner wall assembly has a plurality of cylindrical inner walls arranged in multiple stages along the axial direction.
6. The electromagnetic wave blocking filter according to claim 5, wherein the cylindrical inner wall assembly blocks electromagnetic waves of different wavelengths for each stage.
7. 3. The electromagnetic wave blocking filter according to claim 2, wherein the cylindrical inner wall assembly is arranged such that the axial center of the cylindrical inner wall is inclined by 3 degrees with respect to the axial center of the support body.
8. 4. The electromagnetic wave blocking filter according to claim 3, wherein the cylindrical inner wall assembly is supported by the support body with the cylindrical inner wall inclined at 3 degrees with respect to the axis of the support body.
9. The electromagnetic wave blocking filter according to claim 1, wherein the reflectance in the low reflection portion is 0.3% or less.