JP2023171414A - Toxic substance reduction device - Google Patents

Abstract

To provide means of gradually and reliably reducing a toxic substance without dispersing it by discharging fluid after reducing the toxic substance to the outside in a decelerating manner, while reliably decomposing, inactivating and/or killing a toxic substance or the like contained in the fluid, to reduce an amount of the toxic substance while suctioning the fluid, with a simple structure.SOLUTION: A toxic substance reduction device comprises: a suction unit that suctions fluid; a discharge unit that discharges the fluid; reduction means of emitting waves that decompose and/or inactivate and/or sterilize a toxic substance contained in the fluid; and a flow path that communicates the suction unit and the discharge unit. The suction unit is disposed above the flow path, and the discharge unit is disposed below the suction unit.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a toxic target reduction device.

Conventionally, air purifiers that purify indoor air are known, and these air purifiers remove pollutants such as odor substances, dust, pollen, bacteria, viruses, and VOCs (volatile organic compounds) along with the air. is sucked through a suction port and collected using a filter or the like (for example, see Patent Document 1).
Also, an air purifier including a filter and an electrostatic atomizer has been proposed. This air purifier takes dust, smoke, pollen, bacteria, mold, allergens, viruses, etc. floating in the room into the air purifier from the intake port, and also collects electrostatic charges containing nanocolloid particles from the electrostatic atomizer. Water droplets are released and released from the exhaust port along with clean air by a blower fan. The charged water droplets are emitted near the intake port, and charge and coarsen dust, smoke, pollen, bacteria, mold, allergens, viruses, etc., making them easier to collect with a filter (see, for example, Patent Document 2).

Japanese Patent Application Publication No. 2018-175113 Japanese Patent Application Publication No. 2011-226744

The air purifier described in the above-mentioned Patent Document 1 blows the sucked air upward and detects the concentration of pollutants in the returned air. I end up stirring it. That is, when pollutants remain in a predetermined area, the operation of the air purifier scatters, stirs, and diffuses the pollutants into the indoor space. Furthermore, among pollutants, viruses are extremely small in size compared to pollen and bacteria, so depending on the performance of the filter, it may not be possible to collect them at all. In such cases, the viruses that could not be captured are circulated indoors by the recirculation of air ejected by the air purifier, which can actually scatter, agitate, and spread the viruses in the indoor space, increasing the spread of disease. There is a problem with letting it happen.
Also, in the air purifier described in Patent Document 2, the indoor air is agitated with the clean air released from the exhaust port, which scatters, stirs, and spreads the virus staying indoors. There is a problem in that this can lead to the spread of disease infection.

The present invention was achieved through intensive research by the inventor in view of the above problems, and uses a simple structure to reliably decompose or inactivate toxic substances contained in the fluid while sucking the fluid. It is an object of the present invention to provide a means for gradually and reliably reducing toxic substances by killing and/or eliminating them, without causing the toxic substances to spread within a space.

The toxic object reduction device of the present invention includes a suction part that sucks in a fluid, a discharge part that discharges the fluid, and a reducer that emits waves that decompose and/or inactivate and/or sterilize the toxic object contained in the fluid. and a channel for communicating the suction section and the discharge section, the suction section being disposed above the flow channel, and the discharging section being disposed below the suction section. It is characterized by being

Further, in the toxicity target reduction device of the present invention, the total opening area of the fluid outlet in the discharge part is larger than the opening area of the fluid suction port in the suction part, and the flow rate of the fluid sucked from the suction part is In comparison, the present invention is characterized in that the flow rate of the fluid discharged from the discharge section is reduced.

Furthermore, the toxicity target reduction device of the present invention is characterized in that the suction section is disposed on an end surface of the casing.

Further, the toxicity target reduction device of the present invention is characterized in that the discharge port is disposed on the circumferential surface of the casing.

Further, in the toxic target reduction device of the present invention, a plurality of the discharge ports are arranged along the circumferential direction of the casing, and the total opening area as the sum of the opening areas of the respective discharge ports is equal to the opening of the suction port. It is characterized by being larger than its area.

Further, the toxicity target reduction device of the present invention is characterized in that the discharge section discharges the fluid to a region other than the region in which the suction section can suck the fluid.

Further, the toxic target reduction device of the present invention is characterized in that the reducing means includes an ultraviolet light source that radiates ultraviolet rays into the flow path to reduce the toxic target.

Further, the toxic target reduction device of the present invention is characterized in that the ultraviolet light source has a substantially tubular shape and is disposed within the flow path.

Furthermore, the toxic object reduction device of the present invention is characterized in that the toxic object is a bacteria, a virus, and/or a harmful molecule.

Further, the toxic target reduction device of the present invention is characterized in that a filter to which foreign matter can adhere is disposed between the suction section and/or the discharge section and the flow path.

Further, the toxicity target reduction device of the present invention is characterized in that it has a reflecting surface that repeatedly reflects the waves emitted from the reduction means within the flow path.

Further, the toxicity target reduction device of the present invention is characterized in that the reflective surface is disposed on a part or the entire area of the inner circumferential surface forming the flow path.

Further, the toxicity target reduction device of the present invention is characterized in that the flow path is formed by a cylindrical part having openings at both ends through which a fluid can pass, and an internal space that communicates between the ends. shall be.

According to the present invention, with a simple structure, while sucking fluid, toxic substances contained in the fluid are reliably decomposed or inactivated and/or killed and reduced, and the toxic substances are diffused in space. It is possible to gradually and reliably reduce the toxic target without causing any damage.

FIG. 1 is a perspective view showing a toxic target reduction device of the present invention. FIG. 1 is a cross-sectional view showing the toxic target reduction device of the present invention. FIG. 3 is a perspective view showing the inside of the device excluding the casing. It is a figure showing an ultraviolet rays suppression part. FIG. 3 is a diagram showing the flow of air inside the toxic target reduction device. It is a figure showing the flow of air in a room. It is a figure showing a guide board. It is a figure showing a guide board. It is a figure which shows the cylindrical part which provided the heat sink on the outer surface. FIG. 7 is a sectional view showing another example of the toxic target reduction device. FIG. 3 is a perspective view showing an airflow inducing section.

Embodiments of the toxic target reduction device of the present invention will be described below. The toxic substance reduction device includes a suction part that sucks in fluid, a discharge part that discharges the fluid, and a reduction part that emits waves (ultraviolet rays) that decompose and/or inactivate and/or sterilize the toxic substances contained in the fluid. The cylindrical part is provided with an extinguishing means, and a cylindrical part that forms a flow path that communicates the suction part and the discharge part, and has a reflecting surface on its inner circumferential surface that repeatedly reflects the wave motion at a high level. Moreover, the opening of the discharge part is set so that the flow velocity of the fluid discharged from the discharge part is suppressed compared to the flow velocity when the fluid is sucked in from the suction part.

Note that fluid here is a concept that includes gas, liquid, and powder, and toxic objects include pathogenic microorganisms such as bacteria and viruses, as well as formaldehyde, sulfur dioxide gas, nitrite gas, and odors that contain harmful molecules. It is an object that contains components, etc., is toxic to at least the human body, and moves with the fluid.

FIG. 1 is a perspective view showing a toxic target reducing device 1 of the present invention, and FIG. 2 is a sectional view showing the toxic target reducing device 1 of the present invention. The toxic target reduction device 1 includes a substantially cylindrical casing 2 that stands upright. A suction section 4 for sucking in external air is formed on the upper end surface of the casing 2, and a discharge section 6 for discharging air to the outside is formed on the circumferential surface of the casing 2.

Further, inside the housing 2, there is a cylindrical part 8 having a substantially cylindrical shape and an inner circumferential surface having a circumferential shape, an ultraviolet ray emitting part 10 as a means for reducing toxic substances, and a part 10 for causing air to flow. A blower section 12 (flow generating section) and the like are provided for this purpose. The suction unit 4 has a suction port that opens at the top of the housing 2, and external air flows into the inside of the device through the suction port.
A filter (not shown) is disposed near the suction part 4, and examples of the filter include a coarse dust filter that mainly collects particles of 50 μm or more, and a medium-high performance filter that mainly collects particles of 25 μm or more. (MEPA filter), HEPA filter that collects particles of 0.3 μm, ULPA filter that collects particles of 0.15 μm, and the like. Of course, the filters can be arranged in appropriate positions and numbers, for example, in the vicinity of the discharge port 6.

The discharge section 6 is formed approximately in the middle of the housing 2 and has a plurality of discharge ports provided along the circumferential surface of the housing 2. For example, when the housing 2 has a cylindrical shape with a substantially rectangular cross section, a discharge port is formed on each rectangular surface. Further, the total opening area of the discharge port is set to be twice or more, for example, sufficiently larger than the opening area of the suction port. In addition, when the housing 2 has a cylindrical shape with a rectangular cross section, the opening area of the discharge port on each side is set to exceed 1/4 of the opening area of the suction port, and preferably exceeds the same size, so that the total opening area is 2. It is desirable to set it to at least twice as much.

The housing 2 has a substantially cylindrical cylindrical part 8, an ultraviolet ray emitting part 10 (reducing means), a blowing part 12 for causing air to flow, and the like arranged therein. The cylindrical portion 8 has openings at both ends through which air can pass, and an internal space (cavity) that communicates between the ends. Note that the cavity of the cylindrical portion 8 functions as a flow path that can guide the flow of air. Therefore, the air flowing in through the suction part 4 passes through the cylindrical part 8 from one end (upper end) of the cylindrical part 8 to the other end (lower end). Further, the cylindrical portion 8 has a substantially endless cross-sectional shape on its inner circumferential surface. Here, it is assumed that the inner circumferential surface of the cylindrical portion 8 has a substantially circumferential shape, but of course, the inner circumferential surface of the cylindrical portion 8 may have a cross-sectional shape of a polygon (triangular, quadrangular, pentagonal, etc.), an elliptical shape, an elongated shape, etc. It may be a circular shape, a constant width figure (Reuleaux polygon), or the like.

FIG. 3 is a perspective view showing the inside of the device excluding the casing 2, and the lower end of the cylindrical portion 8 is fixed to the base 1a of the toxic target reduction device 1 with a gap therebetween. Therefore, a vent hole 8a is formed between the base portion 1a and the cylindrical portion 8. Further, the cylindrical portion 8 has a gap that serves as a flow path in the radial direction with respect to the housing 2 . That is, the outer diameter of the cylindrical portion 8 is set smaller than the inner diameter of the housing 2. Thereby, the gap between the housing 2 and the cylindrical portion 8 communicates with the discharge portion 6.

Inside the toxic target reduction device 1, a flow path is formed in which the suction part 4, the space inside the cylindrical part 8, the vent 8a, the gap between the cylindrical part 8 and the housing 2, and the discharge part 6 are fluidly connected. be done. Note that the cross-sectional area of the cavity of the cylindrical portion 8 is set to be greater than or equal to the opening area of the suction portion 4 so as not to impede the flow of air within the flow path. Further, the size (opening area) of the vent 8a is equal to or larger than the cross-sectional area of the cavity of the cylindrical portion 8, and the cross-sectional area of the gap between the cylindrical portion 8 and the housing 2 is equal to or larger than the size of the vent 8a. do.

The cylindrical portion 8 has a reflective surface 9 over the entire inner circumference. The reflecting surface 9 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 that includes at least one of the following.
The reflective surface 9 may also be constructed by providing a thin film of metal (silver, aluminum, nickel, copper, etc.) on the inner surface of the cylindrical portion 8. Further, it can also be formed by attaching an ultraviolet reflective material to the surface of an appropriate base material by vapor deposition, sputtering, or the like.

Further, when a silver material or an aluminum material is used for the reflective surface 9, a protective film functioning as a coating may be applied to the surface in order to prevent surface oxidation. The protective film in this case can be made of a material that does not reduce the reflectance of the reflective surface 9, such as acrylic resin, quartz glass, PTFE, or the like. Note that methods for forming the protective film using PTFE include vapor deposition, sputtering, and the like.

Further, the reflective surface 9 may be formed by forming multiple layers of thin films on the surface of the cylindrical portion 8. For example, the reflective surface 9 can be formed by stacking a thin film of metal, a thin film of an alloy whose main component is metal, a film of oxide (aluminum oxide, silicon oxide, titanium oxide, zirconium oxide, etc.) to form a multilayer structure. It's okay. 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.

Further, a region may be formed on the inner circumferential surface of the cylindrical portion 8 in which a film of a photocatalytically active material is provided. That is, by creating an active surface by irradiation with ultraviolet rays, it is possible to perform sterilization, antivirus, deodorization, purify the air by decomposing organic chlorine compounds, formaldehyde, etc., and reduce toxic targets. Note that examples of photocatalytically active substances include titanium oxide and tungsten oxide.

The ultraviolet radiation unit 10 emits ultraviolet radiation for decomposing, inactivating, disinfecting, sterilizing, sterilizing, etc. a toxic target, and for example, a mercury lamp, a xenon lamp, an excimer lamp, a metal halide lamp, a neon lamp, and/or Alternatively, an LED or the like may be used.
The ultraviolet radiation section 10 has a long tube shape and is arranged inside the cylindrical section 8, that is, within the air flow path. Moreover, the ultraviolet radiation part 10 is arranged so that its longitudinal direction is parallel to the axial direction of the cylindrical part 8 and substantially overlaps with the central axis of the cylindrical part 8. Therefore, the ultraviolet radiation section 10 is surrounded by the reflective surface 9. As a result, the ultraviolet rays emitted from the ultraviolet ray emitter 10 are reflected by the reflective surface 9.

The wavelength of the ultraviolet light emitted from the ultraviolet radiation section 10 is preferably about 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 260 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.

Moreover, an ultraviolet LED (Light Emitting Diode) may be applied to the ultraviolet ray emitting section 10. Examples of such ultraviolet LEDs include those using aluminum gallium nitride (AlGaN). For example, a plurality of ultraviolet LEDs may be arranged substantially linearly, or a plurality of ultraviolet LEDs may be arranged vertically and/or horizontally in a plane to constitute the ultraviolet ray emitting section.

It goes without saying that a plurality of ultraviolet radiation units 10 may be arranged. If a plurality of ultraviolet radiation units 10 are arranged, the amount of ultraviolet rays increases accordingly, so that the efficiency of reducing the toxic target can be improved.

Furthermore, an ultraviolet suppressing section 14 is provided in the housing 2 so that the ultraviolet rays emitted from the ultraviolet ray emitting section 10 do not leak through the suction section 4 . As shown in FIG. 4, the ultraviolet suppressing section 14 is formed by arranging a plurality of bent (bent) plate-like members in parallel at predetermined intervals. The plate-like member in this case has an appropriate shape, and includes, for example, an inclined surface 14a that is inclined with respect to the axial direction. Prevents ultraviolet rays from leaking to the outside.

The blower section 12 is a so-called propeller-like member, and includes a rotating body that rotates around the axis of the cylindrical section 8, a plurality of blades formed on the outer peripheral surface of the rotating body, a motor that rotates the rotating body, and the like. configured. Further, the type, shape, etc. of the blowing section 12 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, plate fan, etc.). Examples include turbo fans, limit load fans, airfoil fans, etc.), centrifugal axial fans, vortex fans, and cross-flow fans (crossflow fans, etc.). Of course, a plurality of blowers 12 may be installed. For example, it is possible to arrange the air blowing parts 12 at both ends of the axial direction of the cylindrical part 8 or in the vicinity of the suction part 4, and it is also possible to generate a flow using a plurality of air blowing parts 12.

The toxic target reducing device 1 causes air to flow through the blower section 12 and emits ultraviolet rays inside the cylindrical section 8 through the ultraviolet ray emitting section 10 . Specifically, by driving the blower section 12, air is sucked in from the outside through the suction section 4, and the air is made to flow inside the device and is discharged from the discharge section 6.
Here, FIG. 5 is a diagram showing the flow of air inside the toxic target reduction device 1. As shown in FIG. The liquid flows upward through the vent hole 8a along the gap between the cylindrical portion 8 and the housing 2, and is discharged to the outside through the discharge portion 6.

Furthermore, a high-density, high-dose ultraviolet region is created inside the cylindrical portion 8. That is, when the ultraviolet radiation part 10 emits ultraviolet rays inside the cylindrical part 8, the ultraviolet rays are repeatedly reflected by the reflective surface 9, so that the dose of ultraviolet rays increases. Therefore, the toxic substances in the air flowing down inside the cylindrical part 8 from the upper part to the lower part pass through the ultraviolet region and are exposed to a high dose of ultraviolet rays, thereby being attenuated.

In addition, the air after reducing the toxic target is discharged to the outside via the discharge part 6, and at this time, the discharge part 6 exists in almost the entire circumferential area, and the flowing air can flow in multiple directions. is discharged. Furthermore, as described above, the opening area of the discharge section 6 is made wider than the opening area of the suction section 4 to reduce the blowing speed. This prevents dust from being stirred up and also prevents the spread of untreated air (toxic material) that may exist indoors.

The toxic target reduction device 1 can be installed and used indoors. For example, when the toxic substance reduction device 1 is installed in the center of the room as shown in Fig. 6, the suction part 4 opens upward, so the air above the device (and the toxic substances) is preferentially removed. Inhale. Such a suction part 4 is located at a position corresponding to the height at which human exhalation or air containing exhaled breath remains, or at a position below the height at which human exhalation or air containing exhaled breath remains ( For example, it is preferable to arrange it at a position of 70 to 90 cm from the ground. For example, the suction section 4 can be placed near the height of respiratory organs such as the oral cavity and nasal cavity where human exhalation and exhaust gas tend to accumulate. It goes without saying that the suction portion 4 may be located at a height of less than 70 cm or at a height of 90 cm or more from the ground.

The discharge part 6 discharges air substantially uniformly in a region different from the region above the suction part 4, that is, below the suction part 4 and around (on all sides). Furthermore, since air is discharged from the discharge section 6 in each direction at a weak wind speed (blow speed), there is almost no convection of indoor air due to the discharged air. Therefore, it is possible to prevent toxic substances contained in a person's exhaled breath from being spread by the expelled air.
However, the closer the position of the discharge part 6 is to the position of the suction part 4, the more easily the air discharged from the discharge part 6 is sucked in by the suction part 4. Therefore, the discharge part 6 is spaced apart from the suction part 4. It is desirable that the air from the discharge section 6 is directed horizontally or downward, although this is not particularly limited.

Further, it is preferable that the discharge part 6 is arranged at a position sufficiently lower than the suction part 4. According to this arrangement, air can be discharged from a position lower than the oral cavity and nasal cavity, and human exhalation and exhaust air can be prevented. Disturbance of the airflow (flow of air toward the suction part 4) in a region where it is likely to accumulate can be suppressed.

As described above, the toxic target reducing device 1 of the present invention creates a high-dose ultraviolet region in the cylindrical part 8, which is an air flow path, so that the toxic target flowing down with the air is removed from the cylindrical part. It can be reduced within 8. Furthermore, since the total area of the openings of the discharge section 6 is expanded compared to the suction section 4, the air is discharged at a blowing speed that is slower than the suction speed of the air sucked in by the suction section 4. As a result, it is possible to suppress the flow of air in the room that is forced by the exhaust gas, and to suppress the spread of toxic substances floating in the space. In other words, while inhaling air from an area where there is a high possibility of the existence of toxic substances, while ensuring that the toxic substances contained in the inhaled air are reduced, the air after the toxic substances have been reduced is different from the inhalation area. By discharging air into a space in a region where the possibility of a toxic object existing is low, the toxic object existing in the space is gradually and surely reduced without stirring the air in the space. be able to.
In this way, the toxicity target reduction device 1 inhales air and sufficiently inactivates and/or kills fungi and viruses attached to micro droplets and aerosols using ultraviolet rays, and securely removes toxic molecules using ultraviolet rays. In order to reduce the toxic target by decomposing it into , etc., the toxic target staying in the space can be gradually and reliably reduced without being diffused.

Moreover, since air is discharged from the holes of the discharge part 6 provided on substantially the entire circumference, the air is dispersed and discharged radially around the toxic target reduction device 1 . This also makes it possible to suppress the flow of air that is forcibly generated in the surrounding area, and it is possible to suppress the spread of toxic substances stagnant in the space to the surrounding area. Furthermore, by preventing the toxic object from spreading to the surrounding area, the user of the device is not made to feel anxious about virus infection, etc., and can be given a sense of security.

Note that the filter disposed in the toxicity target reduction device 1 is not limited to the vicinity of the suction part, and can be disposed at an appropriate position. Further, the number of filters to be installed is not limited, and for example, they may be placed inside the cylindrical portion 8 or near the discharge portion 6. Further, the blowing speed of the air to be discharged may be suppressed by utilizing the effect of pressure loss due to the number of filters disposed.

Note that the temperature of the ultraviolet radiation section 10 may gradually rise as it continues to emit ultraviolet light, and thus is greatly affected by temperature depending on the radiation time. That is, since the output gradually decreases depending on the radiation time, it is desirable to provide a structure that promotes heat exhaustion (heat radiation) from the ultraviolet radiation part 10. For example, the cylindrical portion 8 can be formed of a material with high thermal conductivity, and heat convection can be used to promote heat exhaustion.

Further, a guide plate (guide portion) for guiding the flow of air may be arranged inside the cylindrical portion 8. If such a guide plate causes the air to swirl around the ultraviolet radiation part 10, heat exhaust efficiency can be improved. Furthermore, by swirling the air inside the cylindrical portion 8, the attitude of the toxic target relative to the ultraviolet ray emitting unit 10 can be changed, and ultraviolet rays can be radiated to the toxic target in various directions. That is, it becomes easier to radiate ultraviolet rays to toxic objects that exist behind dust and dust, and the toxic objects can be reliably reduced.

Further, like the cylindrical part 8, the guide plate can be made of a material with high thermal conductivity, and can further promote exhaust heat from the ultraviolet ray emitting part 10. Here, as shown in FIG. 7, the guide plate 20 may have a shape that is gradually curved so as to shift the phase by approximately 90 degrees from one end in the longitudinal direction to the other end. Of course, the shape of the guide plate 20 can be set as appropriate, and it goes without saying that the shape of the guide plate 20 may be such that the angle of phase shift along the longitudinal direction exceeds 90°.

Further, the cylindrical portion 8 may be provided with a heat sink on its outer surface (outer peripheral surface) to further promote exhaust heat from the ultraviolet ray emitting portion 10. That is, as shown in FIG. 9, the heat exhaust efficiency of the entire cylindrical portion 8 may be improved by providing unevenness (concave portions and convex portions alternately) on the outer surface of the cylindrical portion 8. Note that the shape of the unevenness, the direction in which it extends, the direction in which it is arranged, etc. are not limited to those that extend along the axial direction of the cylindrical portion 8 and are arranged in parallel along the circumferential direction, as shown in FIG. Needless to say, there is no such thing.
For example, the unevenness may have a circumferential shape along the circumferential direction of the cylindrical portion 8, and a plurality of unevenness may be formed in the axial direction. Further, a plurality of unevenness may be formed diagonally with respect to the axial direction, a plurality of unevenness may be formed in a row, or an unevenness may be formed in a substantially knurling shape (square, cross-shaped, etc.). good. It goes without saying that similar unevenness may be formed on the inner surface of the cylindrical portion 8 as well.

Further, the guide plate 20 may be formed of an ultraviolet reflective material similarly to the cylindrical portion 8 to create a high-dose ultraviolet region, but it may also be formed of an ultraviolet transmissive member that transmits ultraviolet rays. good. Even in this case, the ultraviolet rays emitted from the ultraviolet ray emitting unit 10 and transmitted through the guide plate 20 can be reflected by the reflective surface 8 and transmitted through the guide plate 20 again, so that the reduction of toxic substances is hardly hindered. . Note that the ultraviolet-transparent material may be, for example, glass, quartz (SiO ₂ ), sapphire (Al ₂ O ₃ ), amorphous fluororesin such as PTFE, acrylic resin, or the like.

Furthermore, when the guide plate 20 has a spiral shape with one turn or more, the contact area with air increases and the heat exhaust efficiency can be improved, but the pressure loss may become large. The blowing speed from the discharge section may be adjusted.

Furthermore, the number of guide boards 20 is not limited to two; for example, it is also possible to arrange three or more guide boards 20, such as four guide boards 20 as shown in FIG. be. Of course, as the number of guide plates 20 increases, the total contact area between the air passing through the inside of the cylindrical portion 8 and all the guide plates 20 increases, so that the heat exhaust efficiency can be improved.
The guide plate 20 may be formed to extend over substantially the entire region along the axial direction of the cylindrical portion 8, but is not limited to this, of course. Alternatively, it may extend from the other end to a midway part in the axial direction, or it may exist only in the midway part of the cylindrical part 8 excluding one end and the other end. Further, the guide plate 20 may be disposed intermittently along the axial direction within the cylindrical portion 8, such as at one end of the cylindrical portion 8 and at a midway portion.

Further, the swirling airflow may be generated inside the cylindrical portion 8 by a member other than the guide plate 20. Here, FIG. 10 is a sectional view showing another example of the toxic object reduction device 1, in which an airflow inducing section 30 is provided as a guide section for inducing a swirling airflow between the cylindrical section 8 and the blowing section 12. be able to.

FIG. 11 is a perspective view showing the airflow inducing section 30. The airflow inducing section 30 includes blades 32 as guide sections arranged at predetermined intervals along the circumferential direction on the inner peripheral surface of one end side of the cylindrical outer frame section 30a. Equipped with multiple. The vanes 32 are arranged at an angle with respect to the axial direction so that the air passing through them spirals.
The blades 32 are located upstream of the blowing section 12 in the flow direction, and therefore are arranged downstream of the blades 32. Therefore, the airflow generated by the blower section 12 can be forcibly swirled by the airflow guide section 30, and a swirling airflow can also be gradually generated within the cylindrical section 8 upstream of the airflow guide section 30.

Note that the arrangement of the airflow inducing section 30 is not limited to between the cylindrical section 8 and the blowing section 12, and may be set at an appropriate position. Therefore, the airflow inducing part 30 may be arranged within the cylindrical part 8 or between the suction part 4 and the cylindrical part 8. It goes without saying that a plurality of airflow inducing sections 30 may be provided. Note that a high reflective layer capable of reflecting ultraviolet rays is provided on the inner surface of the blade 32 of the airflow inducing section 30, that is, the surface facing the center in the axial direction of the cylindrical section 8, so as to reflect ultraviolet rays toward the outside of the cylindrical section 8. The ultraviolet rays may be reflected inward.

Furthermore, in the embodiments described above, the housing 2 has a rectangular cross-section, but is not limited to this. That is, as long as the housing 2 can surround at least the cylindrical portion 8, the housing 2 may have an appropriate shape such as a cylindrical shape, a cylindrical shape, a rectangular parallelepiped shape, a polygonal prism shape, or the like. In addition, when forming the suction part 4 on the top of the housing 2, the top may have a flat shape, but it should have a shape such as a conical shape that prevents objects from being placed on the top of the housing 2. It is preferable. In this way, it becomes difficult to place objects on the housing 2, it is possible to prevent part or all of the suction section 4 from being blocked, and it is possible to prevent a decrease in the amount of intake air.

Further, the arrangement of the suction section 4 and the discharge section 6 in the housing 2 is not particularly limited. At least the suction part 4 is set at a position where it can efficiently suck in the toxic substances floating and staying in the room. Further, the discharge section 6 is set at a position to discharge air so as not to diffuse the accumulated toxic substances indoors.

Note that the opening of the suction port of the suction part 4 and the opening of the discharge port of the discharge part 6 are such that, for example, the intake amount of air through the suction part 4 is 250 L/s or more, and the speed of the air blown out from the discharge part 6 is Each size may be set so that the speed is 1 to 2 m/s or less.
Note that the intake air amount is appropriately set depending on the installation environment of the device and the like. For example, when installing the device in a room or space where people gather, the air supply amount may be set to correspond to the total exhaust amount of the staff in the room or the people around the device. Since the exhaust volume per minute per person is 5 to 8 liters, when setting the intake air volume that can inhale almost all of the exhaled air for 10 people, the ventilation unit 12 should be set so that the intake air volume is 80 L/m or more. Set the rotation speed, blade size, etc.

Note that the orientation of the housing 2 is not limited to vertical placement as shown in FIG. 1, but may be placed horizontally, that is, arranged so that the axial direction is horizontal. In that case, the suction part and the discharge part are arranged so that air in a region where there is a high probability of the existence of a toxic object can be sucked in and air can be discharged while avoiding a region where there is a high possibility of the existence of a toxic object. For example, it is desirable to provide a suction portion on a part of the top surface of the casing when the casing is placed horizontally, and to provide a discharge portion on the peripheral surface of the casing excluding the top surface, the end surface in the axial direction, or the like.

Further, the internal flow path may be set so that the cross-sectional area gradually increases toward the downstream side along the flow direction. In this way, it is possible to suppress the flow rate of the flowing air from gradually slowing down and the blowing speed of the air at the discharge part 6 from decreasing and further disturbing the surrounding airflow.

In addition, when the 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, for example, offices, conference rooms, restaurants, showrooms, Spaces where people gather, such as libraries, schools, kindergartens, nursery schools, shops, entertainment facilities (karaoke boxes, aquariums, planetariums, movie theaters, art museums, museums, bowling alleys, etc.), vehicles (cars, airplanes, ships, trains), etc., or spaces where people gather. It can be installed in spaces where people tend to be crowded.

In addition, although the toxic substances were reduced by irradiation with ultraviolet rays, we also used heating means to heat the inside of the flow path to the extent that the toxic substances could be further reduced, or by generating a localized micro-discharge phenomenon, or by arranging them facing each other. An electric field generating means may be provided in which an electric field is created in the flow path by a pair of positive and negative electrodes to cause toxic objects (particularly pathogenic microorganisms) to be adsorbed to the electrodes, thereby reducing the toxic objects. 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.

Further, the toxic object reduction device may include at least one sensor among a temperature sensor, a humidity sensor, a human sensor, and a dirt sensor, and may control the flow by the flow generating means based on detection by the sensor. For example, the flow generating means may be operated when the sensor detects the presence of a person in the surrounding area. Further, the flow generating means may be stopped when the sensor no longer detects a person, when a predetermined time has elapsed since the flow generating means started operating, or the like.

In addition, although the explanation has been given using the ultraviolet ray emitting unit 10 as an example of reducing means, if it is possible to reduce the toxic target, it is possible to use sound waves, radio waves, microwaves, infrared rays, visible light, ultraviolet rays, X-rays, and/or γ-rays, etc. A radiation section that emits waves may also be used.

Further, a sensor such as a temperature sensor, humidity sensor, human sensor, dirt sensor, particle counter, etc. may be provided, and the flow by the air blower 12 and the ultraviolet radiation by the ultraviolet radiation unit 10 may be controlled based on the detection by the sensor. . For example, it may be controlled to start operating when a human sensor detects a person, or it may be controlled to stop operating when it no longer senses a person or when a predetermined period of time has elapsed since it no longer senses a person. may be controlled.
Alternatively, the operation may be configured to be stopped when the number of particles counted by the particle counter becomes less than a certain value.

DESCRIPTION OF SYMBOLS 1... Toxicity target reduction device, 2... Housing, 4... Suction part, 6... Discharge part, 8... Cylindrical part, 9... Reflective surface, 10... Ultraviolet radiation part, 12... Ventilation part, 14... Ultraviolet ray suppression part , 20... Guide plate, 30... Airflow inducing section.

Claims (13)

a suction unit that sucks fluid;
a discharge section that discharges the fluid;
A reduction means for emitting waves that decompose and/or inactivate and/or sterilize toxic substances contained in the fluid;
a flow path that communicates the suction part and the discharge part,
The suction section is arranged above the flow path,
The said discharge part is arrange|positioned below the said suction part, The toxicity object reduction device characterized by the above-mentioned. The total opening area of the fluid outlet in the discharge part is larger than the opening area of the fluid inlet in the suction part,
The toxic target reduction device according to claim 1, characterized in that the flow rate of the fluid discharged from the discharge part is lowered compared to the flow velocity of the fluid sucked in from the suction part. 3. The toxic target reduction device according to claim 1, wherein the suction section is arranged on an end surface of the casing. 3. The toxic target reduction device according to claim 2, wherein the discharge port is arranged on a peripheral surface of the casing. A plurality of the discharge ports are arranged along the circumferential direction of the housing,
5. The toxicity target reduction device according to claim 4, wherein a total opening area as a sum of opening areas of each of the discharge ports is larger than an opening area of the suction port. 6. The toxic target reduction device according to claim 1, wherein the discharge section discharges the fluid to a region other than the region in which the suction section can suck the fluid. 7. The device according to claim 1, wherein the attenuation means includes an ultraviolet light source that radiates ultraviolet rays into the flow path to attenuate the toxic object. 8. The toxic target reduction device according to claim 7, wherein the ultraviolet light source has a substantially tubular shape and is disposed within the flow path. 9. The toxic target reducing device according to claim 1, wherein the toxic target is a bacteria, a virus, and/or a harmful molecule. 10. The toxic target reduction device according to claim 1, further comprising a filter to which foreign matter can adhere, which is disposed between the suction section and/or the discharge section and the flow path. 11. The toxicity target reduction device according to claim 1, further comprising a reflecting surface that repeatedly reflects the waves emitted from the reduction means within the flow path. 12. The toxicity target reduction device according to claim 11, wherein the reflective surface is arranged on a part or the entire area of an inner circumferential surface forming the flow path. 13. The flow path is formed by a cylindrical part having openings at both ends through which fluid can pass, and an internal space communicating between the ends. Toxic target reduction device.