WO2022009897A1 - 紫外線照射装置及び紫外線照射方法 - Google Patents
紫外線照射装置及び紫外線照射方法 Download PDFInfo
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- WO2022009897A1 WO2022009897A1 PCT/JP2021/025506 JP2021025506W WO2022009897A1 WO 2022009897 A1 WO2022009897 A1 WO 2022009897A1 JP 2021025506 W JP2021025506 W JP 2021025506W WO 2022009897 A1 WO2022009897 A1 WO 2022009897A1
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- biosensor
- light
- light source
- ultraviolet irradiation
- uvc
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- 238000000034 method Methods 0.000 title claims description 7
- 238000001514 detection method Methods 0.000 claims description 41
- 238000001816 cooling Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 27
- 230000001954 sterilising effect Effects 0.000 description 14
- 230000005855 radiation Effects 0.000 description 12
- 238000004659 sterilization and disinfection Methods 0.000 description 9
- 230000001678 irradiating effect Effects 0.000 description 7
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 206010073306 Exposure to radiation Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/24—Apparatus using programmed or automatic operation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
Definitions
- the present invention relates to an ultraviolet irradiation device and an ultraviolet irradiation method.
- an ultraviolet irradiation device that is irradiated in an open system such as the above-mentioned conventional ultraviolet irradiation device that avoids exposure to radiation
- an area that is irradiated with ultraviolet rays is generated even outside the detection range of the human sensor.
- it is difficult to reliably avoid exposure to ultraviolet rays. Therefore, an ultraviolet irradiation device capable of avoiding exposure more reliably has been desired.
- an object of the present invention is to provide an ultraviolet irradiation device and an ultraviolet irradiation method capable of more reliably avoiding exposure to ultraviolet rays. There is.
- the ultraviolet irradiation device is a biological sensor that is arranged around the light source so that the light source that emits ultraviolet rays and the irradiation range of the light source and the self-detection range overlap with each other to detect the presence of a person.
- An electronic circuit that controls the light source based on the output signal of the biosensor, and a light-shielding cover that shields a part of ultraviolet rays emitted from the light source, and the light source sandwiches the light-shielding cover.
- the electronic circuit stops the emission of the ultraviolet rays when the biosensor detects the presence of a person, and the state in which the biosensor detects the presence of a person is changed to a state in which the presence of a person is not detected. It is characterized in that the light source is controlled so as to emit the ultraviolet rays again when the switch is made.
- the light source that emits ultraviolet rays is arranged around the light source so that the irradiation range of the light source and the self-detection range overlap, and the presence of a person is detected.
- the light source is arranged in a region opposite to one side where the ultraviolet irradiation target exists, with a light-shielding cover that shields a part of the ultraviolet rays emitted from the light source.
- the sensing surface of the biosensor and the light emitting surface of the light source are installed so as to face the same direction, and the angle of 1/2 of the maximum detection angle of the biosensor in the installed state is the light emitting surface of the light source.
- the ultraviolet rays are shielded so as to be larger than the maximum angle formed by the normal vector and the ultraviolet rays emitted from the light source and passed without being shielded by the light shielding cover.
- the maximum detection angle of the biosensor in the installed state is the maximum detection that the biosensor can detect when the biosensor, the light source, and the light-shielding cover are installed and the ultraviolet irradiation can be performed. It's called a horn.
- the maximum value of the detection angle in the narrowed state becomes the maximum detection angle.
- the maximum value of the detection angle in the unnarrowed state that is, the viewing angle determined by the specifications of the biosensor , The maximum detection angle.
- FIG. 1A It is a perspective view which shows an example of the ultraviolet irradiation apparatus which concerns on 1st Embodiment of this invention. It is a perspective view of FIG. 1A. It is sectional drawing which shows the AA'cross section of FIG. 1A. (A) is a front view of the ultraviolet irradiation device, (b) is a rear view, and (c) is a side view. It is a block diagram which shows an example of the ultraviolet irradiation apparatus which concerns on 2nd Embodiment of this invention. This is an example of a timing chart used to explain the operation of the ultraviolet irradiation device. It is sectional drawing which shows the cross section of AA' in the modification of FIG. 1A.
- FIG. 1A is a perspective view showing an example of the appearance of the ultraviolet irradiation device 1
- FIG. 1B is a perspective view showing an example of seeing through the inside of the outer case 3.
- 2A is a cross-sectional view taken along the line AA of FIG. 1A
- FIG. 3A is a front view of the ultraviolet irradiation device 1
- FIG. 3B is a rear view
- FIG. 3C is a top view and a bottom view. Is the same as the top view.
- FIG. 4 is a block diagram showing a functional configuration of the ultraviolet irradiation device 1.
- the ultraviolet irradiation device 1 includes a device main body 2 and a substantially rectangular parallelepiped outer case 3 for accommodating the device main body 2.
- the device main body 2 includes one biosensor 11 and two sets of light emitting units 12.
- the light emitting unit 12 includes three UVC-LEDs (light sources) 12a, one blue LED (visible light light source) 12b, a heat sink 12c, and a driver substrate 12d.
- the UVC-LED (light source) 12a is a light emitting diode that emits ultraviolet rays having a peak wavelength of 200 nm or more and 300 nm or less, and from the viewpoint of sterilization efficiency of bacteria and the like, it is more preferable that the peak wavelength is 255 nm or more and 280 nm or less. It is even better if it is as follows.
- a drive circuit 12aa for driving and controlling the UVC-LED 12a and a driving circuit 12ba for driving and controlling the blue LED 12b are mounted on the driver board 12d. Further, a drive circuit 12aa for the UVC-LED 12a and a drive circuit 12ba for the blue LED 12b are mounted on the driver board 12d of the light emitting unit 12 of either of the two sets of light emitting units 12, and a control circuit (electronic) is mounted. Circuit) 1a is mounted.
- the control circuit 1a inputs the detection signal (output signal) of the biological sensor 11, controls the UVC-LED 12a and the blue LED 12b based on the detection signal via the drive circuits 12aa and 12ba, respectively, and also controls the ultraviolet irradiation device 1 Control the whole.
- the biosensor 11 is composed of, for example, a quantum infrared sensor (IR sensor) and is mounted on a sensor substrate 11a for the biosensor 11.
- the UVC-LED12a and the blue LED12b are mounted on the light emitting substrate 12e.
- the light emitting substrate 12e is provided separately from the sensor substrate 11a and is not in contact with the sensor substrate 11a so that it is not thermally connected to the sensor substrate 11a.
- the light emitting substrate 12e has a substantially rectangular shape, three UVC-LEDs 12a are arranged at equal intervals along the long side at a position near one long side of the light emitting substrate 12e, and the blue LED 12b is substantially in the center of the light emitting substrate 12e. It is located slightly closer to the other long side of.
- the sensing surface of the biosensor 11 and the light emitting surface of all UVC-LED12a are arranged so as to face in the same direction. Further, all the UVC-LEDs 12a are arranged in a range where the distance from the biosensor 11 is 20 mm or less in a plan view. By reducing the distance between the UVC-LED 12a and the biosensor 11, the ultraviolet irradiation area can be contained in the biosensor detection area even in the vicinity of the UVC-LED 12a, which is a light source.
- the biological sensor 11 is not limited to the quantum infrared sensor (IR sensor), but is not limited to a focal infrared sensor, a microwave radar, a reflection infrared sensor, a millimeter wave radar, an ultrasonic sensor, a temperature detection sensor, and a ToF sensor. It can be applied even if it is. Further, the biosensor 11, UVC-LED12a, blue LED12b, and driver board 12d are connected by wiring (not shown).
- the outer case 3 has a rectangular parallelepiped case body 3a having front and back surfaces corresponding to the front and back surfaces of the ultraviolet irradiation device 1, a light-shielding cover 3b provided in the opening portion on the front surface side of the case body 3a, and the back surface of the case body 3a. It is provided with a back cover 3c provided in the opening portion on the side. As shown in FIG. 2, each of the open ends of the case body 3a is formed with a stepped portion 3aa for supporting the light-shielding cover 3b and a stepped portion 3ab for supporting the back cover 3c.
- slit holes 3da are formed on each of the two side surfaces 3d which are the upper surface and the bottom surface of the ultraviolet irradiation device 1 and which are in contact with the long sides of the case body 3a.
- the slit holes 3da are formed along the longitudinal direction of the outer case 3, three rows each in the height direction of the case body 3a, and two rows along the longitudinal direction.
- the light-shielding cover 3b has one circular hole 31 for the biosensor 11, six circular holes 32 for the UVC-LED 12a, and two circular holes 32 for the blue LED 12b. Hole 33 is formed.
- the hole 31 is formed in the center of the light-shielding cover 3b, and its diameter is larger than that of the other holes 32 and 33.
- the hole 32 has a diameter of about 1/3 to 1/4 of that of the hole 31, and the hole 33 is slightly larger than the hole 32.
- the holes 32 and 33 are arranged half by half so as to sandwich the holes 31 from both sides along the longitudinal direction of the light-shielding cover 3b and to be symmetrical with respect to the holes 31.
- the three holes 32 are arranged at equal intervals along the width direction (the lateral direction of the light-shielding cover 3b), and the hole 32 located at the center thereof and the hole 33 are arranged in the longitudinal direction (light-shielding cover 3b). Longitudinal direction) Located on the center line.
- two boss-shaped protrusions 3ba for fixing the sensor substrate 11a are formed on the back surface of the light-shielding cover 3b on the side facing the back cover 3c.
- the protrusions 3ba are provided at positions separated from each other on both sides along the longitudinal direction from the hole 31, and are slightly offset to one side from the center line in the longitudinal direction.
- the sensor board 11a is arranged at a position separated from the light-shielding cover 3b by the length of the protrusion 3ba.
- a boss-shaped protrusion 12ca for suppressing the upper surface of the heat sink 12c is provided at a position slightly inserted into the center side from the four corners on the back surface of the light-shielding cover 3b.
- the back cover 3c is formed with a substantially rectangular opening 3ca for heat dissipation of the heat sink 12c, and the opening 3ca is located in the substantially central portion of the back cover 3c in the width direction in the longitudinal direction. Two are formed at intervals along the line. Further, in the vicinity of each of the openings 3ca on the side of the back cover 3c facing the light-shielding cover 3b, the positions of the two long sides of the opening 3ca are slightly closer to the short sides of the back cover 3c than the central portion. Is provided with a boss-shaped fixing member 3cb for fixing the heat sink 12c.
- the heat sink 12c has a sword-shaped shape in which a large number of rod-shaped members c2 are formed on one surface of a substantially square flat plate portion c1, and a driver is formed along one surface of four side surfaces formed by the rod-shaped member c2.
- the substrate 12d is fixed to the flange portion c3 of the heat sink 12c, and the UVC-LED12a mounted on the light emitting substrate 12e is provided on the surface of the flat plate portion c1 opposite to the rod-shaped member c2 and on the side opposite to the driver substrate 12d.
- the light emitting substrate 12e is fixed to the flange portion c3 along the side of the flat plate portion c1.
- the heat sink 12c to which the driver substrate 12d and the light emitting substrate 12e are fixed is arranged so that the light emitting substrate 12e side is closer to the center portion, and the rod-shaped member c2 side faces the back cover 3c with the rod-shaped member c2 of the heat sink 12c. Is screwed in from the opposite side to integrally fix the flange portion c3 and the fixing member 3cc. As a result, the heat sink 12c and the back cover 3c are integrally fixed.
- the light-shielding cover 3b to which the sensor board 11a is fixed is screwed into the protrusion 12ca from the side opposite to the sensor board 11a of the light-shielding cover 3b so that the sensor board 11a side is on the inside.
- the case body 3a are integrated, and the device body 2 is fixed in the outer case 3.
- the heat sink 12c and the biosensor 11 can be in a state of not being thermally connected. That is, if the thermal resistance from the heat sink 12c to the biosensor 11 is 2.5 K / W or more, the heat transfer from the UVC-LED 12a to the biosensor 11 can be ignored, and it is considered that they are not thermally connected. Can be done.
- the heat sink 12c is not limited to a sword-shaped heat sink, and can be applied to a heat sink having a plurality of fins.
- the biological sensor 11 slightly protrudes from the surface of the light-shielding cover 3b so that a person existing in the vicinity of the irradiation target of the ultraviolet irradiation device 1 can be detected while the device main body 2 is fixed in the outer case 3. Have been placed. Further, in the UVC-LED12a and the blue LED12b, the irradiation light of each is emitted to the outside of the outer case 3 through the corresponding holes 32 and 33, and the irradiation area by the UVC-LED12a and the blue LED12b in the irradiation target. It is positioned so as to substantially coincide with the irradiation area of.
- the ultraviolet irradiation device 1 operates, for example, using a DC voltage of 24 V input to an input terminal (not shown) as a power supply voltage, and as shown in FIG. 4, a control circuit 1a that controls the entire ultraviolet irradiation device 1 is a biological sensor 11.
- UVC-LED 12a is driven and controlled via the drive circuit 12aa of each of the two light emitting units 12, and the blue LED 12b is driven and controlled via the drive circuit 12ba to irradiate the human body with ultraviolet rays.
- Ultraviolet rays are applied to the object to be irradiated while avoiding being damaged.
- the control circuit 1a detects that the state of detecting a person has been switched to the state of not detecting a person based on the detection signal of the biological sensor 11. Then, as shown in the timing chart of FIG. 5A, when it is detected that the state in which a person is detected has been switched to the state in which no person is detected, UVC is reached when the preset standby time T1 elapses. -The LED 12a is driven during the irradiation time T2 to irradiate with ultraviolet rays. Then, when the irradiation time T2 has elapsed, the ultraviolet irradiation is stopped.
- the UVC-LED12a is driven to irradiate ultraviolet rays. Further, as shown in FIG. 5 (b), when the state in which no person is detected is periodically irradiated with ultraviolet rays every time the non-irradiation time T3 continues, or when it is detected that the person has disappeared, the ultraviolet rays are emitted.
- the ultraviolet irradiation is promptly stopped.
- the UVC-LED12a is driven and the blue LED12b is driven, and the same region as the ultraviolet irradiation region by the UVC-LED12a is irradiated with the blue light of the blue LED12b. This makes it possible to visualize the ultraviolet irradiation area.
- the standby time T1 is set to a time that can be regarded as switching to a state in which a person is not detected based on the detection signal of the biological sensor 11, and is set to, for example, about 5 seconds.
- the irradiation time T2 is set according to the irradiation time required to sufficiently sterilize the irradiated object by the ultraviolet irradiation of the UVC-LED12a, and is set to, for example, about 10 minutes.
- the non-irradiation time T3 is set to, for example, about 50 minutes.
- the UV irradiation is performed periodically. , Perform regular sterilization.
- the ultraviolet rays are irradiated, so that even if the operation of the ATM or the like is not continuously performed, it is periodically performed. Since sterilization is performed regularly by irradiating with ultraviolet rays, the ATM and the like can be maintained in a state where a certain degree of sterilization effect can be obtained. It should be noted that it is not always necessary to irradiate the ultraviolet rays every time the non-irradiation time T3 elapses, that is, periodically, and the ultraviolet irradiation may be performed intermittently.
- the ultraviolet irradiation time may be shorter than the irradiation time T2 because the person does not operate the ATM or the like. .. Further, since the ultraviolet irradiation area can be visualized by the blue LED 12b, the person who operates the ATM or the like can easily recognize the ultraviolet irradiation area and can avoid the exposure more reliably.
- the biosensor 11 senses heat, the detection accuracy decreases when the temperature around the biosensor 11 rises.
- the sensor substrate 11a on which the biological sensor 11 is mounted and the light emitting substrate 12e on which the UVC-LED 12a and the blue LED 12b are mounted are arranged separately, and further, the light emitting substrate 12e is arranged.
- a heat sink 12c is fixed to the surface. The heat sink 12c enhances the heat dissipation effect of the UVC-LED12a.
- the biosensor 11 is arranged as far as possible from the heat sink 12c to which the heat of the UVC-LED 12a is transferred, so that the influence of heat is obtained. Can be further reduced.
- the ultraviolet irradiation area is visualized, the person can easily visually recognize the ultraviolet irradiation area. Therefore, the installation work of the ultraviolet irradiation device 1 can be easily performed. Further, by visualizing the ultraviolet irradiation area, for example, a person who operates an ATM or the like as an irradiation target can recognize whether or not sterilization is properly performed, and ultraviolet irradiation is performed when the operation is performed. You can recognize that it is not. Therefore, a sense of security can be obtained. Although the case where the heat dissipation effect is obtained by providing the heat sink 12c has been described here, the present invention is not limited to this. A cooling fan may be provided together with the heat sink 12c, or a cooling fan 12f may be provided between the heat sink 12c and the back cover 3c as shown in FIG.
- the present invention is not limited to this, and the position is not limited to this.
- the blue LED 12b (corresponding to the hole 33) is arranged near one end in the longitudinal direction of the outer case 3, and the biosensor 11 (corresponding to the hole 31) and the UVC-LED 12a (corresponding to the hole 32) are arranged in the outer case 3. It can also be arranged slightly closer to the other end than the center in the longitudinal direction of.
- (a) is a front view and (b) is a rear view.
- the ultraviolet irradiation device 1 may be fixed alone at a position where it is possible to irradiate the irradiated object with ultraviolet rays. Further, for example, as shown in FIG. 8, the ultraviolet irradiation device 1 may be attached to the tip of the movable arm and installed as a desk light type ultraviolet irradiation device. Further, the ultraviolet irradiation device 1 embeds the device main body 2 in a wall or the like, provides holes 31 to 33 on the wall plate at positions facing the biosensor 11, UVC-LED12a, and blue LED12b, and provides a light-shielding cover 3b on the wall plate. By providing the configuration corresponding to the above, the functional configuration equivalent to that of the ultraviolet irradiation device 1 may be realized.
- FIG. 9A shows a sensing area (detection range) of the biological sensor 11 and an irradiation area (irradiation range) of the UVC-LED 12a.
- the UVC-LED12am is a UVC-LED12a located at the farthest position from the biosensor 11 among the three UVC-LED12a mounted on each light emitting substrate 12e. be.
- the sensing area of the biological sensor 11 is wider than the sum of the irradiation areas of the two UVC-LED12am. .. That is, for example, as shown in FIG. 9B, when the sensing area of the biological sensor 11 is narrower than the sum of the irradiation areas of the two UVC-LED12am, a person tries to operate an ultraviolet irradiation object (for example, an ATM). When the person approaches the irradiation target, the person enters the irradiation area before the person enters the sensing area of the biosensor 11.
- an ultraviolet irradiation object for example, an ATM
- the ultraviolet irradiation is stopped after the exposure. Further, even when the ultraviolet irradiation is not performed, the ultraviolet irradiation is performed at this point when the timing of the periodic ultraviolet irradiation comes, and it is detected by the biological sensor 11 that a person has invaded the controlled area after being exposed to the radiation. At that point, UV irradiation will be stopped. Since the UVC-LED can be generally regarded as a point light source, the ultraviolet radiation angle of the UVC-LED 12am in FIG. 9B is schematically shown, and is actually emitted at a wider angle than the one shown in the figure. There is.
- the ultraviolet irradiation device 1 it is detected that a person is present before a person enters the irradiation area, the ultraviolet irradiation is stopped, and the ultraviolet irradiation is not performed. , It is possible to avoid being exposed to radiation more reliably, and it is possible to improve safety.
- the sensing area and the irradiation area are adjusted in order to make the sensing area of the biological sensor 11 wider than the irradiation area of the UVC-LED12am.
- the emission line and the light emitting surface of the UVC-LED12am are the ultraviolet rays that pass through the hole 32 without being shielded by the light-shielding cover 3b and are emitted toward the irradiation target.
- the maximum angle formed by the normal vector of is defined as the maximum radiation angle equivalent value ⁇ 1.
- the maximum detection angle that can be detected by the biosensor 11 in the state of being arranged in the outer case 3 that is, the detection angle that can be detected by the biosensor 11 when the biosensor 11 is incorporated in the ultraviolet irradiation device 1.
- the angle of 1/2 of the maximum detection angle, which is the maximum value, is defined as the viewing angle equivalent value ⁇ 2.
- the sensing area and the irradiation area are set so that the maximum radiation angle equivalent value ⁇ 1 is smaller than the viewing angle equivalent value ⁇ 2 ( ⁇ 1 ⁇ 2).
- the expansion ratio of the sensing area of the biological sensor 11 is larger than the expansion ratio of the irradiation area by the UVC-LED12am.
- the ratio of the irradiation area of the two UVC-LED12am included in the sensing area increases, and eventually, the two UVCs in the sensing area. -The irradiation area of LED12am will be included together.
- the irradiation area of the two UVC-LED12a can be set in the sensing area.
- These adjustments are made, for example, the opening diameter and arrangement position of the holes 31 and 32, the distance from the light receiving surface of the biosensor 11 to the hole 31, the distance from the light emitting surface of the UVC-LED12am to the hole 32, and the viewing angle of the biosensor 11. This is performed by combining any one or more of the performance, the maximum angle of the irradiation light of the UVC-LED12am, and the like.
- the distance between the ultraviolet irradiation device 1 and the irradiation target, the biosensor 11 and the UVC-LED 12am so that the irradiation area of two UVC-LED12ams is included in the sensing area Adjust by combining any one or more of the distances between.
- the irradiation area of the two UVC-LED 12am having the largest distance from the biosensor 11 is set to be included in the sensing area of the biosensor 11. is doing.
- the detection area of the UVC-LED12a whose distance between the biosensor 11 and the UVC-LED12am is shorter than the distance between the UVC-LED12am and the biosensor 11 is always included in the detection area of the biosensor 11. Will be.
- UVC-LED12a is placed on a circle centered on the biosensor 11 so that the distance between the sensor 11 and the biosensor 11 is equal, instead of arranging three in two rows at equal intervals. It may be arranged.
- the ultraviolet irradiation device 1 according to the third embodiment is provided with a side cover in the ultraviolet irradiation device 1 according to the second embodiment.
- 10A and 10B show the ultraviolet irradiation device 1 according to the third embodiment
- FIG. 10A is a perspective view showing an example of an ultraviolet irradiation device provided with a side cover
- FIG. 10B is a cross-sectional view showing a main part. Is.
- the ultraviolet irradiation device 1 corresponds to the biosensor 11, UVC-LED12a, and blue LED12b on the surface of the light-shielding cover 3b opposite to the back cover 3c.
- a side cover (protruding portion) 3e surrounding the holes 31 to 33 to be formed is provided.
- the side cover 3e is formed, for example, in the shape of a rectangular parallelepiped rectangular parallelepiped end face.
- the side cover 3e is not limited to the rectangular parallelepiped shape, and in the cross-sectional view shown in FIG. 10B, the end face becomes larger as the side cover 3e is inclined outward and away from the light-shielding cover 3b. It may be in the shape of a light bulb umbrella.
- L1 is the distance between the UVC-LED12am, which is the farthest light source of the UVC-LED12a, which is located at the farthest position from the biosensor 11, and the biosensor 11.
- ⁇ 2 is a value corresponding to a viewing angle, which is an angle of 1 ⁇ 2 of the maximum detection angle that can be detected by the biosensor 11 in a state of being arranged in the outer case 3.
- ⁇ 3 is an ultraviolet ray emitted from the UVC-LED 12am, which is the farthest light source, and is emitted toward the object to be irradiated through the hole 32 without being shielded by the light-shielding cover 3b. It is a value corresponding to the farthest radiation angle representing the angle formed by the emission line passing through the point farthest from the sensor 11 and the normal vector of the light emitting surface of the UVC-LED12am which is the farthest light source.
- the space region between the ultraviolet irradiation device 1 and the irradiation target near the light-shielding cover 3b is a spatial area.
- the irradiation area in the above is not included in the sensing area and a human hand or the like enters such a space area, the irradiation area is first entered and then the sensing area is entered. In other words, there is a possibility of being exposed to radiation. Therefore, the side cover 3e is provided so that human hands or the like do not enter the space area where the irradiation area is not included in the sensing area.
- the point where the sensing area of the biological sensor 11 and the irradiation area of the UVC-LED12am coincide with each other can be represented as a point of height H1 along the normal vector from the light emitting surface of the UVC-LED12am from the above equation (1). can.
- the side cover 3e having a height higher than the point where the sensing area of the UVC-LED12as and the irradiation area of the UVC-LED12as coincide with each other is formed.
- the side cover 3e prevents the entry of human hands or the like into the area that may be exposed to radiation. The safety can be further improved.
- the side cover 3e may be provided so as to surround the holes 31 and 32 corresponding to the biosensor 11 and the UVC-LED 12a.
- the covers may be provided only in the direction in which a person may access. For example, when it is assumed that it is arranged on the touch panel of the ATM, it is only necessary to assume the access of a person from the front direction of the device, so that the cover on the back side and the side surface of the device is unnecessary.
- the side cover 3e is provided and the arrangement positions of the biosensor 11 and the UVC-LED 12a are changed.
- the ultraviolet irradiation device 1 includes one light emitting unit 12 and one biosensor 11. Further, the biosensor 11 is arranged on one end side in the longitudinal direction when viewed from the light-shielding cover 3b side, and the UVC-LED12a is arranged on the other end side in the longitudinal direction of the biosensor 11. Further, the biological sensor 11 is provided in the tilt adjusting mechanism 13, and by adjusting the tilt by the tilt adjusting mechanism 13, the tilt of the sensing surface is directed toward the UVC-LED12a side.
- the support member 13a to which the sensor substrate 11a can be attached and the fixing member 13b are movably fixed, and one end of the fixing member 13b is placed on the surface of the light-shielding cover 3b opposite to the back cover 3c.
- the tilt adjusting mechanism 13 By fixing, attaching the sensor substrate 11a to the support member 13a, and manually adjusting the inclination of the support member 13a, the inclination of the sensor substrate 11a is adjusted and the orientation of the sensing surface is adjusted.
- the tilt of the biological sensor 11 can be adjusted even after the biological sensor 11 is incorporated in the ultraviolet irradiation device 1.
- the ultraviolet irradiation device 1 may be equipped with the tilt adjusting mechanism 13. If it is not necessary to adjust the tilt of the biosensor after incorporation, the tilt adjusting mechanism 13 does not necessarily have to be provided.
- the sensor substrate 11a is arranged so as to be inclined so that the sensing surface faces the UVC-LED12a side, and the sensing area of the biosensor 11 includes the irradiation area of all the UVC-LED12a. It is arranged so that it can be used. Further, although the blue LED 12b is not shown in FIG. 12, the blue LED 12b is arranged so that its blue irradiation area overlaps with the irradiation area of all UVC-LED 12a.
- the biosensor 11 and the UVC-LED12a By arranging the biosensor 11 and the UVC-LED12a in this way, the degree of freedom in the arrangement position of the biosensor 11 can be improved. That is, as shown in FIG. 1B, when the biosensor 11 is arranged in the center when viewed from the front, the biosensor 11 is arranged so that the irradiation area of the UVC-LED 12a is included in the sensing area of the biosensor 11. It is necessary to arrange the UVC-LED12a around the. On the other hand, as shown in FIG. 12, when all the UVC-LEDs 12a are arranged on one side of the biosensor 11, the biosensor 11 is UVC-so that the irradiation area of these UVC-LED12a is included in the sensing area. It may be arranged at an angle toward the LED 12a. That is, since the biosensor 11 may be arranged at any position around the plurality of UVC-LEDs 12a, the degree of freedom in the arrangement of the biosensor 11 can be improved.
- the side cover 3e is provided on the light-shielding cover 3b as in the ultraviolet irradiation device 1 in the third embodiment.
- L2 is the distance between the UVC-LED12am, which is the farthest light source arranged at the farthest position from the biosensor 11 among the UVC-LED12a, and the biosensor 11.
- ⁇ 2 is a viewing angle equivalent value which is 1/2 of the maximum detection angle that can be detected by the biological sensor 11 in the state of being arranged in the outer case 3, and ⁇ 3 is emitted from UVC-LED12am which is the farthest light source.
- the emission lines that are ultraviolet rays that pass through the hole 32 without being shielded by the light-shielding cover 3b and are emitted toward the object to be irradiated the emission line that passes through the point farthest from the biosensor 11 in a plan view and the most. It is a value corresponding to the farthest radiation angle representing the angle formed by the normal vector of the light emitting surface of the UVC-LED12am which is a far light source.
- ⁇ 4 is the inclination of the sensing surface of the biological sensor 11.
- the position is closer to the light-shielding cover 3b. Therefore, H2 corresponding to the height of the side cover 3e along the normal vector of the light emitting surface of the UVC-LED12am, which is the farthest light source, can be shortened by the amount corresponding to the tilt of the biological sensor 11, that is, the side cover. The height of 3e can be lowered. That is, the ultraviolet irradiation device 1 can be further miniaturized.
- the arrangement of the holes 31 to 33 corresponding to each of the light-shielding cover 3b may be changed according to the arrangement of the biological sensor 11, the UVC-LED12a, and the blue LED12b.
- each of the two light emitting units 12 is arranged so that the light emitting surface of the UVC-LED 12a is tilted toward the biological sensor 11.
- the light emitting unit 12 is set so that the inclination (tilt angle) ⁇ a of the light emitting surface of the UVC-LED 12a satisfies the following equation (3).
- L3 in the equation (3) is a living body.
- the distance between the sensor 11 and the UVC-LED12an, and D represents the distance between the light emitting surface of the UVC-LED12an and the object to be irradiated.
- the irradiation area A1 is widened, but the area A2 where the irradiation areas by the UVC-LED 12a mounted on the two light emitting units 12 overlap is narrow. Therefore, the region having a high irradiation density is narrower than the region having a high irradiation density when the overlapping region A3 of the irradiation areas is wide as shown in FIG. 13 (a).
- the tilt adjusting mechanism (light source tilt adjusting mechanism) 13 shown in FIG. 12 may be applied to the light emitting unit 12 to manually adjust the tilt of the light emitting unit 12.
- the tilt adjusting mechanism 13 may be provided on each of the two light emitting units 12, or may be provided on only one of them.
- the ultraviolet irradiation device 1 is provided with a plurality of, for example, two biosensors 11-a and 11-b. That is, as shown in FIG. 14, UVC-LEDs 12a are arranged together, and two biosensors 11-a and 11-b are provided around these UVC-LEDs 12a. At this time, the biosensors 11-a and 11-b may be arranged so that the sensing surface thereof is tilted toward the UVC-LED12a side, or may be arranged so as to be parallel to the light emitting surface of the UVC-LED12a. .. Further, three or more biosensors 11 may be provided.
- biosensors 11 By providing a plurality of biosensors 11 in this way, the area for sensing a person is expanded. Therefore, the existence of a person can be detected more reliably.
- sensors of the same type may be provided, for example, a plurality of sensors of different types may be provided, and the biosensor 11 may be provided depending on the application of the ultraviolet irradiation device 1 and the installation environment. Should be selected.
- the ultraviolet irradiation device 1 according to the first embodiment is further provided with the distance sensor 14.
- the distance sensor 14 is mounted on the light emitting substrate 12e on which the UVC-LED12a is mounted, and measures the distance between the light emitting surface of the UVC-LED12a and an object existing in the same direction.
- the control circuit 1a controls the driving time of the UVC-LED 12a based on the detection signal of the distance sensor 14, and the longer the distance to the irradiation target, the longer the irradiation time of ultraviolet rays. That is, as shown in FIG. 15, the longer the distance to the irradiation target, the lower the irradiation density. Therefore, the longer the distance to the irradiation target, the longer the irradiation time, so that a constant irradiation intensity (irradiation density ⁇ time) can be given to the irradiation target. Therefore, stable sterilization performance can be obtained for the irradiated object.
- the distance sensor 14 can also be used as a biosensor by recognizing that a person has invaded the irradiation area when the differential value of the measurement distance exceeds the threshold value.
- redundancy is increased and it is possible to detect the intrusion of a person more reliably.
- the present invention is not limited to the case where the distance sensor 14 is provided in the ultraviolet irradiation device 1 according to the first embodiment, and it is also possible to provide the distance sensor 14 in the second to fifth embodiments, which is equivalent. The action effect of can be obtained.
- the present invention is not limited to two lights, and one or three or more lights may be provided.
- the UVC-LED12a is not limited to 6 lamps, and a desired number of UVC-LED12a may be provided. For example, when high sterilization performance is required or when sterilization is desired in a shorter time, a larger number may be provided. UVC-LED12a may be provided.
- the biological sensor 11 does not have to be narrowed in the detection angle due to the hole 31 formed in the light-shielding cover 3b. Further, the biosensor 11 may be provided on the outside of the outer case 3, that is, on the surface of the light-shielding cover 3b.
- the biosensor 11 may be fixed to the surface of the wall. Further, when the detection angle of the biological sensor 11 is not narrowed by the hole 31 formed in the light-shielding cover 3b, or by attaching the biological sensor 11 to the surface of the light-shielding cover 3b or the surface of the wall. When the detection angle of the biosensor 11 is not narrowed, the viewing angle determined by the specifications of the biosensor 11 is the maximum detection angle, and the angle of 1/2 of the viewing angle is the viewing angle equivalent value ⁇ 2. ..
- UV irradiation device 1 Using the ultraviolet irradiation device 1 according to the first embodiment, a simulation was performed in which ultraviolet irradiation was performed on an irradiation target of 500 mm ⁇ 500 mm located at a position 300 mm away from the light-shielding cover 3b.
- the output of the UVC-LED12a is 70 mW, and it is assumed that six UVC-LED12a are driven at 465 mA.
- a high ultraviolet irradiation illuminance was obtained in the substantially central portion of the irradiation area.
- the portion having the highest ultraviolet irradiation illuminance had a dose amount (integrated light amount (UV exposure amount)) of 40 mj / cm 2 or more in 10 minutes.
- Ultraviolet irradiation device 1a Control circuit 2 Device body 3 Outer case 3b Light-shielding cover 3c Back cover 3e Side cover 11 Biosensor 11a Sensor board 12 Light emitting part 12a UVC-LED 12b blue LED 12c heat sink 12d driver board 12e light emitting board
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Abstract
Description
また、近年、殺菌を行うことが可能な波長を照射できるLED(light emitting diode)が実用化されたことによって、紫外線光源として管球を用いた装置では実現できなかった装置構成が実現可能になり、持ち運び可能な小型の紫外線照射器が提案されている。
また、紫外線照射装置による紫外線照射領域に人体が侵入すると、有害な紫外線により被爆するリスクがあることから、人感センサと紫外線の照射タイミングを制御する制御回路とを組み合わせることで、被爆を回避するようにした紫外線照射装置等も提案されている(例えば、特許文献1参照。)。
そのため、被爆をより確実に回避することの可能な紫外線照射装置が望まれていた。
ここでいう、設置状態での生体センサの最大検知角とは、生体センサや光源、また遮光カバーが設置され紫外線照射を行うことが可能な状態にある状態において、生体センサが検知可能な最大検知角という。例えば生体センサが遮光カバーに対して光源と同じ側に配置され、遮光カバーによって、生体センサの検知範囲が狭められている場合には、狭められた状態における検知角の最大値が最大検知角となり、光源と同じ側に配置されているが遮光カバーによって検知範囲が狭められていない場合には、狭められていない状態における検知角の最大値、つまり、生体センサの仕様で決定される視野角が、最大検知角となる。
また、以下に示す実施形態は、本発明の技術的思想を具体化するための装置や方法を例示するものであって、本発明の技術的思想は、構成部品の配置等を下記のものに特定するものでない。本発明の技術的思想は、特許請求の範囲に記載された請求項が規定する技術的範囲内において、種々の変更を加えることができる。
図1から図4は、本発明の第1実施形態に係る紫外線照射装置の一例を示す図である。
紫外線照射装置1は、例えば銀行のATM等、多数の人間が触る場所に対して殺菌を行う。
図1Aは紫外線照射装置1の外観の一例を示す斜視図、図1Bはアウターケース3内を透視した一例を示す斜視図である。図2は、図1AのA-A′断面図、図3(a)は紫外線照射装置1の正面図、図3(b)は背面図、図3(c)は上面図であり、底面図は上面図と同一である。図4は、紫外線照射装置1の機能構成を示すブロック図である。なお、図1Aでは、後述の生体センサ11を省略している。
紫外線照射装置1は、装置本体2と、装置本体2を収納する略直方体形状のアウターケース3と、を備える。
生体センサ11の感知面と全てのUVC-LED12aの発光面とは同一方向に向けて配置されている。また、全てのUVC-LED12aは、平面視で生体センサ11との間の距離が20mm以下の範囲に配置される。UVC-LED12aと生体センサ11との距離を近づけることで、光源であるUVC-LED12aの近辺においても、紫外線照射エリアを生体センサ検知エリア内に収めることが可能となる。
また、生体センサ11、UVC-LED12a、青色LED12b、及びドライバ基板12dは図示しない配線で接続されている。
遮光カバー3bには、図3(a)に示すように、生体センサ11用の一つの円形の孔31と、UVC-LED12a用の六個の円形の孔32と、青色LED12b用の二つの円形の孔33とが形成されている。
そして、孔32及び孔33は、遮光カバー3bの長手方向に沿って孔31を両側から挟み込み、孔31を中心として対称となるように、半分ずつ配置されている。この例では、三つの孔32が幅方向(遮光カバー3bの短手方向)に沿って等間隔に並んでおり、その中心に位置する孔32と、孔33とが、長手方向(遮光カバー3bの長手方向)中心線上に位置している。
さらに、遮光カバー3bの裏面の、四隅から中心側に若干入り込んだ位置には、ヒートシンク12cの上面を抑えるためのボス状の突起12caが設けられている。
なお、ヒートシンク12cは剣山形状のヒートシンクに限るものではなく、複数のフィンを備えたヒートシンクであっても適用することができる。
また、生体センサ11が人を検知しない状態に切り替わった時点では紫外線照射を行わず、待機時間T1が経過した時点で紫外線照射を行うため、人が紫外線の照射範囲外に移動したとみなすことができる状態となった時点以後に紫外線照射を行うことになり、より確実に被爆することを回避することができ、安全性を向上させることができる。
なお、必ずしも非照射時間T3が経過する毎に、つまり定期的に紫外線照射を行う必要はなく、断続的に紫外線照射を行うようにしてもよい。また、非照射時間T3が経過する毎に定期的に紫外線照射を行う場合には、人がATM等を操作していないため、紫外線の照射時間を、照射時間T2よりも短い時間にしてもよい。
また、青色LED12bによって、紫外線照射領域を可視化することができるため、ATM等を操作する人間は、紫外線照射領域を容易に認識することができ、より確実に被爆を回避することができる。
なお、ここでは、ヒートシンク12cを設けることで放熱効果を得る場合について説明したが、これに限るものではない。ヒートシンク12cと合わせて冷却ファンを設けてもよく、図6に示すようにヒートシンク12cと背面カバー3cとの間に冷却ファン12fを設けてもよい。
また、紫外線照射装置1は、装置本体2を壁等に埋め込み、壁板の、生体センサ11、UVC-LED12a、青色LED12bと対向する位置に、孔31~33を設け、壁板に遮光カバー3bに相当する構成をもたせることで、紫外線照射装置1と同等の機能構成を実現するようにしてもよい。
次に、本発明の第2実施形態を説明する。
第2実施形態に係る紫外線照射装置1は、第1実施形態に係る紫外線照射装置1において、UVC-LED12aと生体センサ11との位置関係を規定したものである。
図9(a)は、生体センサ11の感知エリア(検出範囲)と、UVC-LED12aの照射エリア(照射範囲)とを示したものである。図9(a)において、UVC-LED12amは、図1Bに示すように、各発光基板12eに実装された3灯のUVC-LED12aのうち、生体センサ11から最も離れた位置にあるUVC-LED12aである。
これらの調整は、例えば、孔31及び32の開口径及び配置位置、生体センサ11の受光面から孔31までの距離、UVC-LED12amの発光面から孔32までの距離、生体センサ11の視野角性能、UVC-LED12amの照射光の最大角度等のうちのいずれか一つ又は複数を組み合わせることにより行う。
ここで、第2実施形態に係る紫外線照射装置1においては、生体センサ11との間の距離が最も大きい2灯のUVC-LED12amの照射エリアが生体センサ11の感知エリア内に含まれるように設定している。そのため、UVC-LED12aのうち、生体センサ11との間の距離がUVC-LED12amと生体センサ11との間の距離よりも短いUVC-LED12aの検知エリアは、必ず生体センサ11の感知エリア内に含まれることになる。
次に、本発明の第3実施形態を説明する。
第3実施形態に係る紫外線照射装置1は、第2実施形態に係る紫外線照射装置1において、サイドカバーを設けたものである。
図10は第3実施形態に係る紫外線照射装置1を示したものであり、(a)はサイドカバーを備えた紫外線照射装置の一例を示す斜視図、(b)は、要部を表す断面図である。
H1≧L1×cos(θ2)×cos(θ3)/sin(θ2-θ3) ……(1)
なお、本紫外線照射装置1において、必ずしも図10や図11に示すように4面をサイドカバーで囲う必要はなく、人がアクセスする可能性のある方向のみにカバーを設ければよい。例えばATMのタッチパネル上に配置する事を想定した場合、装置手前方向からの人のアクセスのみを想定すればよいので、装置奥側および側面のカバーは不要となる。
次に、本発明の第4実施形態を説明する。
第4実施形態は、第1実施形態に係る紫外線照射装置1において、サイドカバー3eを設けると共に、生体センサ11及びUVC-LED12aの配置位置を変えたものである。
H2≧L2×cos(θ2+θ4)×cos(θ3)/sin(θ4+θ2-θ3) ……(2)
次に、本発明の第5実施形態を説明する。
第5実施形態は、第1実施形態に係る紫外線照射装置1において、発光部12の配置位置を変えたものである。第5実施形態に係る紫外線照射装置1では、図13に示すように、二つの発光部12それぞれを、UVC-LED12aの発光面が生体センサ11側に傾くように配置している。発光部12は、UVC-LED12aの発光面の傾き(傾斜角)θaが、次式(3)を満足するように設定する。
θa=asin(L3/D) ……(3)
このように配置することによって、図13(a)に示すように、二つの発光部12それぞれに搭載されたUVC-LED12aの照射エリアが互い重なり合い、照射密度を高めることができる。つまり、第1実施形態に係る紫外線照射装置1のように、生体センサ11を挟んで配置された二つの発光部12に搭載されたUVC-LED12aの発光面が共に同じ方向を向いている場合、図13(b)に示すように、照射エリアA1は広がるが、二つの発光部12に搭載されたUVC-LED12aによる照射エリアが重なる領域A2は狭い。そのため、照射密度が高い領域は、図13(a)に示す、照射エリアの重なる領域A3が広い場合における照射密度が高い領域に比較して、狭い。
なお、発光部12に、図12に示す傾き調整機構(光源傾き調整機構)13を適用し、発光部12の傾きを手動で調整するようにしてもよい。傾き調整機構13は、二つの発光部12のそれぞれに設けてもよく、いずれか一方にのみ設けてもよい。一つの発光部12に1又は複数のUVC-LED12aを実装することにより、UVC-LED12aの傾きを一つずつ或いは複数毎に調整することができる。
次に、本発明の第6実施形態を説明する。
第6実施形態は、第1実施形態に係る紫外線照射装置1において、複数、例えば二つの生体センサ11-a、11-bを設けたものである。
すなわち、図14に示すように、UVC-LED12aを一纏めにして配置し、これらUVC-LED12aの周辺に二つの生体センサ11-a、11-bを設ける。このとき、生体センサ11-a、11-bは、その感知面が、UVC-LED12a側に傾くように配置してもよく、UVC-LED12aの発光面と平行となるように配置してもよい。また、生体センサ11を、3つ以上設けてもよい。
なお、生体センサ11を複数設ける場合には、同一種のセンサを設けてもよく、例えば、種類の異なるセンサを複数設けてもよく、紫外線照射装置1の用途や設置環境に応じて生体センサ11を選定すればよい。
次に、本発明の第7実施形態を説明する。
第7実施形態は、図15に示すように、第1実施形態に係る紫外線照射装置1において、さらに距離センサ14を設けたものである。
距離センサ14は、UVC-LED12aが実装された発光基板12eに実装され、UVC-LED12aの発光面と同一方向に存在する物体との間の距離を測定する。
つまり、図15に示すように、照射対象物までの距離が長いほど、照射密度は低下する。そのため、照射対象物までの距離が長いほど照射時間を長くすることによって、照射対象物に対して一定の照射強度(照射密度×時間)を与えることができる。そのため、照射対象物に対して安定した殺菌性能を得ることができる。
なお、第1実施形態に係る紫外線照射装置1において距離センサ14を設ける場合に限るものではなく、第2から第5実施形態においても、距離センサ14を設けるようにすることも可能であり、同等の作用効果を得ることができる。
また、上記各実施形態において、生体センサ11は、遮光カバー3bに形成された孔31により、検知角度が狭められなくともよい。また、生体センサ11は、アウターケース3の外側、つまり、遮光カバー3bの、表面に設けられていてもよい。
また、遮光カバー3bに形成された孔31により、生体センサ11の検知角度が狭められていない場合、また、生体センサ11を遮光カバー3bの表面に取り付けたり、壁の表面に取り付けたりすることにより、生体センサ11の検知角度が狭められていない場合には、生体センサ11の仕様で決められている視野角が最大検知角となり、視野角の1/2の角度が視野角相当値θ2となる。
1a 制御回路
2 装置本体
3 アウターケース
3b 遮光カバー
3c 背面カバー
3e サイドカバー
11 生体センサ
11a センサ基板
12 発光部
12a UVC-LED
12b 青色LED
12c ヒートシンク
12d ドライバ基板
12e 発光基板
Claims (14)
- 紫外線を放出する光源と、
当該光源の照射範囲と自己の検出範囲とが重なるように前記光源の周辺に配置され人の存在を検出する生体センサと、
前記生体センサの出力信号に基づき前記光源を制御する電子回路と、
前記光源から放出される紫外線の一部を遮光する遮光カバーと、
を備え、
前記光源は、前記遮光カバーを挟んで前記紫外線の照射対象が存在する一の側とは逆側の領域に配置され、
前記生体センサの感知面と前記光源の発光面とは同一方向に向けて設置され、
当該紫外線照射装置に組み込まれた状態での前記生体センサの最大検知角の1/2の角度θ2は、前記発光面の法線ベクトルと、前記光源から放出され前記遮光カバーにより遮光されずに通過した紫外線とがなす最大角度θ1よりも大きく、
前記電子回路は、前記生体センサが人の存在を検出したとき前記紫外線の放出を停止させ、前記生体センサが人の存在を検出している状態から人の存在を検出しない状態に切り替わったとき、再度前記紫外線を放出させるように前記光源を制御する
紫外線照射装置。 - 前記角度θ2は、前記最大角度θ1の2倍の角度よりも小さい請求項1に記載の紫外線照射装置。
- 一又は複数の前記光源を有し、
前記一又は複数の光源から放出され前記遮光カバーを通過した紫外線を囲むように、前記遮光カバーから前記一の側に突出して設けられた突出部を備え、
前記光源のうち前記生体センサから最も離れた位置に配置された最遠光源と前記生体センサとの間の距離をL1とし、
前記最遠光源の発光面の法線ベクトルと、前記最遠光源から放出され前記遮光カバーを通過した紫外線のうち平面視で前記生体センサから最も離れた地点を通る紫外線とがなす角度をθ3としたとき、
前記光源の発光面と前記突出部の先端との間の、前記発光面の法線ベクトルに沿った距離は、
L1×cos(θ2)×cos(θ3)/sin(θ2-θ3)以上である請求項1又は請求項2に記載の紫外線照射装置。 - 一又は複数の前記光源を有し、
前記生体センサは前記光源側に傾斜して設けられ、
さらに、前記一又は複数の光源から放出され前記遮光カバーを通過した紫外線を囲むように前記遮光カバーから前記一の側に突出して設けられた突出部を有し、
前記光源のうち前記生体センサから最も離れた位置に配置された最遠光源と前記生体センサとの間の距離をL2とし、
前記最遠光源の発光面の法線ベクトルと、前記最遠光源から放出され前記遮光カバーを通過した紫外線のうち平面視で前記生体センサから最も離れた地点を通る一の紫外線とがなす角度をθ3とし、
前記生体センサの感知面の法線ベクトルの、前記一の紫外線側への傾斜角度をθ4としたとき、
前記光源の発光面と前記突出部の先端との間の、前記発光面の法線ベクトルに沿った距離は、
L2×cos(θ2+θ4)×cos(θ3)/sin(θ4+θ2-θ3)以上である請求項1に記載の紫外線照射装置。 - 前記光源が、前記生体センサの周囲に複数配置されている請求項1又は請求項2に記載の紫外線照射装置。
- 複数の前記光源のうち少なくとも一つは、その発光面の法線ベクトルがそれぞれ前記生体センサ側に傾斜する光源傾き調整機構を有する請求項5に記載の紫外線照射装置。
- 前記光源のうち前記生体センサから最も離れた位置に配置された最遠光源と前記生体センサとの間の距離をL3とし、
前記生体センサの感知面の中心を通る法線ベクトルを延長した直線の、前記遮光カバーの前記一の側の面との交点から前記照射対象との交点までの距離をDとしたとき、
前記発光面の法線ベクトルの、前記生体センサ側への傾斜角度はasin(L3/D)
である請求項6に記載の紫外線照射装置。 - 前記光源の周辺に複数の生体センサが配置されている請求項1から請求項4のいずれか一項に記載の紫外線照射装置。
- 前記光源と熱的に接続されたヒートシンクを備える請求項1から請求項8のいずれか一項に記載の紫外線照射装置。
- 前記ヒートシンクは、前記生体センサと熱的に接続されていない請求項9に記載の紫外線照射装置。
- さらに冷却ファンを備える請求項9又は請求項10に記載の紫外線照射装置。
- 前記光源の発光面の向きと同一方向に存在する物体までの距離を検出する距離センサを備え、
前記電子回路は、前記距離センサで検出した検出距離に応じて、前記光源による紫外線の放出時間を制御する請求項1から請求項11のいずれか一項に記載の紫外線照射装置。 - 前記光源の照射範囲を、自己の可視光照射範囲に含む可視光光源を備える請求項1から請求項12のいずれか一項に記載の紫外線照射装置。
- 紫外線を放出する光源と、
当該光源の照射範囲と自己の検出範囲とが重なるように前記光源の周辺に配置され人の存在を検出する生体センサと、を備え、
前記光源から放出される紫外線の一部を遮光する遮光カバーを挟んで、前記紫外線の照射対象が存在する一の側とは逆側の領域に前記光源を配置すると共に、前記生体センサの感知面と前記光源の発光面とを同一方向に向けて設置し、
当該設置状態での前記生体センサの最大検知角の1/2の角度が、前記光源の発光面の法線ベクトルと、前記光源から放出され前記遮光カバーにより遮光されずに通過した紫外線とがなす最大角度よりも大きくなるように前記紫外線を遮光する紫外線照射方法。
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