JP2022150814A - Ultraviolet irradiation device - Google Patents

Abstract

To provide ultraviolet irradiation device which offers improved user convenience.SOLUTION: An ultraviolet irradiation device is provided, comprising an ultraviolet light source, a sensor unit, and a reception unit. The sensor unit has a light sensitive unit for receiving infrared light. Upon receipt of an infrared signal from a terminal device by the light sensitive unit, the reception unit accepts control according to the received infrared signal.SELECTED DRAWING: Figure 1

Description

An embodiment of the present invention relates to an ultraviolet irradiation device.

Conventionally, there has been disclosed a system that turns on and off a load according to the detection result of a human sensor or other sensors.

JP 2012-164570 A

By the way, there is known an ultraviolet irradiation device that irradiates ultraviolet rays to eliminate viruses and bacteria on the surface of an object and in the space. There is an upper limit to the amount of ultraviolet rays that the human body receives per day. In some cases, it may be necessary to set conditions such as changing the irradiation conditions depending on the situation. Therefore, in the prior art, it is desired to improve user convenience.

A problem to be solved by the present invention is to provide an ultraviolet irradiation device capable of improving user's convenience.

An ultraviolet irradiation device according to an embodiment includes an ultraviolet light source, a sensor section, and a reception section. The sensor section has a light receiving section that receives infrared rays. The receiving unit receives control according to the received infrared signal when the light receiving unit receives the infrared signal from the terminal device.

ADVANTAGE OF THE INVENTION According to this invention, the ultraviolet irradiation device which can improve a user's convenience can be provided.

FIG. 1 is a diagram showing an example of an ultraviolet irradiation system according to the first embodiment. FIG. 2 is a block diagram showing an example of the configuration of the ultraviolet irradiation system according to the first embodiment. FIG. 3 is a flowchart showing an example of the flow of irradiation control processing in the ultraviolet irradiation device according to the first embodiment. FIG. 4 is a block diagram showing an example of the configuration of an ultraviolet irradiation device according to a modification of the first embodiment; FIG. 5 is a diagram showing an example of an ultraviolet irradiation device according to the second embodiment. FIG. 6 is a block diagram showing an example of the configuration of an ultraviolet irradiation device according to the second embodiment. FIG. 7 is a diagram showing an example of distance information.

Hereinafter, an ultraviolet irradiation device according to an embodiment will be described with reference to the drawings. Configurations having the same functions in the embodiments are denoted by the same reference numerals, and overlapping descriptions are omitted. In addition, the ultraviolet irradiation device described below is merely an example, and does not limit the embodiments.

An ultraviolet irradiation device 1 according to an embodiment described below includes an ultraviolet light source 2 , a sensor section 10 and a reception section 21 . The sensor unit 10 has a light receiving unit 5 that receives infrared rays. When the light receiving unit 5 receives an infrared signal from the terminal device 50, the receiving unit 21 receives control according to the received infrared signal.

The reception unit 21 according to the embodiment described below receives the setting of the time when the ultraviolet light source 2 starts lighting.

The reception unit 21 according to the embodiment described below receives the setting of the time when the ultraviolet light source 2 is turned off.

The reception unit 21 according to the embodiment described below receives the setting of the time during which the ultraviolet light source 2 continues lighting.

The reception unit 21 according to the embodiment described below receives the setting of the current time.

The sensor unit 10 according to the embodiment described below includes a distance sensor (third sensor 3A) that measures the distance from the ultraviolet light source 2 to the irradiation target. The reception unit 21 receives the setting of the lighting pattern of the ultraviolet light source 2 according to the distance measured by the distance sensor.

The ultraviolet irradiation device 1B according to the embodiment described below turns off the ultraviolet light source 2 when the distance to the object to be irradiated is equal to or less than a threshold.

The receiving unit 21 according to the embodiment described below receives control according to the infrared signal received by the light receiving unit 5 when the ultraviolet light source 2 is turned off.

[First Embodiment]
(Configuration of UV irradiation system)
FIG. 1 is a diagram showing an example of an ultraviolet irradiation system according to the first embodiment. As shown in FIG. 1 , the ultraviolet irradiation system 100 has an ultraviolet irradiation device 1 and a terminal device 50 . The ultraviolet irradiation system 100 is, for example, a system that achieves sterilization and virus suppression of objects and spaces including structures in an unmanned or manned indoor environment. Although FIG. 1 shows the ultraviolet irradiation system 100 having one ultraviolet irradiation device 1, it may have a plurality of ultraviolet irradiation devices 1 depending on the size of the target area.

The ultraviolet irradiation device 1 has an ultraviolet light source 2 , a first sensor 3 , a second sensor 6 and a notification section 7 . The ultraviolet irradiation device 1 is used by being fixed to, for example, a ceiling or a wall surface.

The ultraviolet light source 2 has, for example, one or more excimer lamps and emits ultraviolet rays. The ultraviolet light source 2 emits ultraviolet rays including wavelengths of 200 to 230 nm, for example. The ultraviolet light source 2 may be a light source other than an excimer lamp, such as an LED (Light Emitting Diode). Alternatively, a filter that blocks light of wavelengths other than a specific wavelength may be provided, and the light emitted from the ultraviolet light source 2 may be output through the filter. In addition, the ultraviolet light source 2 may have a light-emitting element capable of adjusting light.

The first sensor 3 has a light emitter 4 and a light receiver 5 . The light emitting unit 4 has a light emitting element that emits infrared rays. The light receiving unit 5 receives reflected infrared light emitted from the light emitting unit 4 . The first sensor 3 is, for example, a proximity sensor that detects that a person has approached the ultraviolet light source 2 . The first sensor 3 detects that a person has approached within a predetermined range, for example, 1 m, from the ultraviolet light source 2 . Further, when the first sensor 3 detects that a person has approached a predetermined range, the ultraviolet irradiation device 1 stops or interrupts the lighting of the ultraviolet light source 2 and turns off the ultraviolet light source 2 .

Also, the light receiving unit 5 can receive an infrared signal transmitted from the terminal device 50 . The first sensor 3 determines whether the infrared light received by the light receiving unit 5 is an infrared signal. When it is determined that the light receiving unit 5 has received the infrared signal from the terminal device 50, the ultraviolet irradiation device 1 performs control according to the received infrared signal. Whether or not the signal is an infrared signal can be determined by, for example, the presence or absence of a code signal. For example, when the light receiving section 5 receives an infrared ray containing a code signal, it determines that the received infrared ray is an infrared signal. When the light-receiving unit 5 receives an infrared ray that does not contain a code signal, it determines that the received infrared ray is not an infrared ray signal. Note that the first sensor 3 may confirm the type of the code signal and determine that the infrared light received by the light receiving unit 5 is the infrared signal.

The second sensor 6 is, for example, a human sensor that detects the presence or absence of a person or an animal in the irradiation area from the ultraviolet light source 2 . For example, an infrared sensor, an ultrasonic sensor, a visible light sensor, or the like can be used as the second sensor 6 .

The notification unit 7 notifies information regarding the operating state of the ultraviolet irradiation device 1, the presence or absence of an abnormality, and the like. The notification unit 7 has a first lamp 8 and a second lamp 9 . The first lamp 8 has one or a plurality of light emitting elements and reports the lighting status of the ultraviolet light source 2 . The first lamp 8 notifies, for example, that the ultraviolet light source 2 is on by lighting. Further, the first lamp 8 notifies that the ultraviolet light source 2 is turned off by, for example, turning off.

The second lamp 9 has one or a plurality of light-emitting elements and reports the operating status of the ultraviolet irradiation device 1 . The second lamp 9 notifies, for example, that the ultraviolet irradiation device 1 is in operation by lighting. Further, the second lamp 9 notifies an abnormality of the ultraviolet irradiation device 1 by blinking, for example. The second lamp 9 may notify, for example, prompting replacement of the ultraviolet light source 2 due to a difference in emission color.

Information notified by the notification unit 7 is not limited to the above-described information. The reporting unit 7 may report the state of detection by the second sensor 6, for example. Further, the notification unit 7 may notify the lighting mode of the ultraviolet light source 2 to be described later by changing the lighting mode of the first lamp 8 and/or the second lamp 9 . The lighting modes of the first lamp 8 and/or the second lamp 9 may include, for example, lighting colors and their combinations, blinking intervals, and the like. Further, the notification unit 7 may notify various information such as those described above by voice or the like.

The terminal device 50 is, for example, a terminal device owned by an administrator of the ultraviolet irradiation device 1 or a user who uses a facility or the like in which the ultraviolet irradiation device 1 is installed. The terminal device 50 transmits operation information corresponding to the user's operation as an infrared signal. Moreover, as the terminal device 50, for example, a portable remote controller for controlling the on/off of the ultraviolet irradiation device 1 can be employed. Also, the terminal device 50 may be a portable terminal device such as a smart phone, a tablet terminal, or a notebook computer, or may be a remote controller fixed in the facility.

(Functional configuration of each device according to the embodiment)
The processing executed by the ultraviolet irradiation device 1 described above will be described in detail with reference to FIG. 2 along with the description of the configuration of each device included in the ultraviolet irradiation system 100 according to the embodiment. FIG. 2 is a block diagram showing an example of the configuration of the ultraviolet irradiation system according to the first embodiment. It should be noted that the description of the contents described with reference to FIG. 1 will be omitted or simplified as appropriate.

First, the configuration of the ultraviolet irradiation device 1 will be described. The ultraviolet irradiation device 1 according to this embodiment includes the ultraviolet light source 2 and the notification unit 7, the sensor unit 10, the control unit 20, the storage unit 30, and the timer 40, which are described with reference to FIG.

The sensor unit 10 has the first sensor 3 and the second sensor 6 described with reference to FIG. The sensor unit 10 outputs the detection result obtained by the first sensor 3 as a proximity sensor to the control unit 20 . Further, when the light receiving section 5 (see FIG. 1) of the first sensor 3 receives an infrared signal from the terminal device 50 , the sensor section 10 outputs the received infrared signal to the control section 20 . The sensor unit 10 also outputs the detection result obtained by the second sensor 6 as a human sensor to the control unit 20 .

The control unit 20 has a reception unit 21 , a sensor control unit 22 , a lighting control unit 23 and a notification control unit 24 .

The control unit 20 has an internal memory for storing programs defining various processing procedures and required data, and executes various processing using these. The control unit 20 is implemented by a microcomputer or the like. The microcomputer includes processors such as a CPU (Central Processing Unit) and MPU (Micro Processing Unit), and storage devices such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM stores programs for controlling each part of the ultraviolet irradiation device 1 and applications for executing various processes. A processor such as a CPU executes programs and applications stored in the ROM, thereby realizing control and various functions of the ultraviolet irradiation device 1 by the microcomputer. The RAM is used as a memory area required for execution of calculations by a processor such as a CPU. Note that the control unit 20 may read a program or the like stored in the storage unit 30 and execute the read program to realize control and various functions of the ultraviolet irradiation device 1 .

The receiving unit 21 receives control according to the infrared signal received by the light receiving unit 5 . When the light receiving unit 5 receives the infrared signal output from the terminal device 50, the receiving unit 21 receives control according to the infrared signal.

The receiving unit 21 receives, for example, the setting of the time when the ultraviolet light source 2 starts lighting. The reception unit 21 receives, for example, the setting of the time during which the ultraviolet light source 2 continues lighting. Upon receiving control regarding the setting of the lighting start time and the lighting duration, the receiving unit 21 executes setting processing based on the control received by the receiving unit 21 and stores the setting information 32 in the storage unit 30 . Moreover, the reception part 21 may receive the setting of the time when the ultraviolet light source 2 is turned off.

The reception unit 21 may receive the setting of the current time. If the information about the current time is included in the infrared signal output from the terminal device 50 to the light receiving unit 5, the receiving unit 21 can receive the setting of the current time. When receiving unit 21 receives the setting of the current time, receiving unit 21 sets timer 40 based on the received current time. The timer 40 is, for example, an internal timer that the ultraviolet irradiation device 1 has, and is capable of measuring a predetermined time (for example, 24 hours).

Further, the reception unit 21 may receive an instruction to turn on/off the ultraviolet light source 2 . The reception unit 21 may further receive an instruction to turn on/off the ultraviolet irradiation device 1 .

Further, the receiving unit 21 may receive control according to the infrared signal received by the light receiving unit 5 when the ultraviolet light source 2 is turned off. Thereby, for example, malfunction of the ultraviolet irradiation device 1 due to erroneous detection of an infrared signal can be reduced.

The sensor control section 22 controls operations of the first sensor 3 and the second sensor 6 included in the sensor section 10 . The sensor control unit 22 controls ON/OFF of the first sensor 3 and the second sensor 6 . Moreover, the sensor control unit 22 may change the detection sensitivity of the first sensor 3 and/or the second sensor 6 as necessary.

The lighting control unit 23 controls lighting of the ultraviolet light source 2 . The lighting control unit 23 may, for example, refer to the setting information 32 stored in the storage unit 30 and turn on the ultraviolet light source 2 in a predetermined lighting pattern. The lighting pattern is, for example, lighting control that temporarily turns off the ultraviolet light source 2 during lighting and intermittently turns on the ultraviolet light source 2 . The lighting pattern is represented by, for example, a combination of regularly repeated lighting times (eg, 15 seconds) and lighting times (eg, 200 seconds). The lighting control unit 23 refers to the setting information 32 stored in advance in the storage unit 30, and lights the ultraviolet light source 2 in a predetermined lighting pattern according to the conditions.

Further, the lighting control unit 23 may, for example, refer to the setting information 32 and the timer 40 stored in the storage unit 30 and turn on the ultraviolet light source 2 at a preset lighting start time. Further, the lighting control unit 23 may turn off the ultraviolet light source 2 at a preset lighting end time. Further, the lighting control unit 23 may refer to the setting information 32 stored in advance in the storage unit 30 and turn off the ultraviolet light source 2 after a predetermined time has elapsed.

Further, when the reception unit 21 receives control to turn on/off the ultraviolet light source 2, the lighting control unit 23 turns on/off the ultraviolet light source 2 according to the received control details. Further, when the ultraviolet light source 2 is dimmable, the lighting control unit 23 may control the dimming rate of the ultraviolet light source 2 according to the control details received by the receiving unit 21 .

The notification control unit 24 controls notification by the notification unit 7 . The notification control section 24 controls the first lamp 8 and the second lamp 9 of the notification section 7 . The notification control unit 24 refers to notification information 33 stored in advance in the storage unit 30, and operates the notification unit 7 in a mode according to information regarding the operating state of the ultraviolet irradiation device 1, the presence or absence of an abnormality, and the like.

The storage unit 30 stores programs for realizing various controls of the ultraviolet irradiation device 1 . The storage unit 30 is implemented by, for example, a semiconductor memory device such as a RAM (Random Access Memory) or a flash memory, or a storage device such as a hard disk or an optical disk. Pattern information 31, setting information 32, and notification information 33 are stored in the storage unit 30, for example.

The pattern information 31 is one or more preset lighting patterns. The ultraviolet irradiating device 1 can register in the setting information 32 the application, installation position, etc. among the plurality of lighting patterns in association with the lighting pattern.

The setting information 32 is information regarding lighting control of the ultraviolet light source 2 . The setting information 32 may include, for example, the lighting start time, the lighting end time, or the lighting duration of the ultraviolet light source 2, the lighting mode, and the like.

The notification information 33 is information regarding notification control of the notification unit 7 . In the notification information 33, for example, information related to the operating state of the ultraviolet irradiation device 1, the presence or absence of an abnormality, etc. is registered in association with the notification mode by the notification unit 7. FIG.

Next, the configuration of the terminal device 50 will be described. The terminal device 50 has an operation unit 51 , a clock unit 52 , a transmission unit 53 and a storage unit 54 .

The operation unit 51 receives a control instruction from the user for the ultraviolet irradiation device 1 included in the ultraviolet irradiation system 100 . For example, when the operation unit 51 receives from the user a setting/change of the lighting, extinguishing, lighting start time, lighting duration, or lighting end time of the ultraviolet light source 2 of the ultraviolet irradiation device 1, the received lighting, extinguishing, or lighting operation is performed. A control instruction indicating the setting/change of the start time, the lighting duration, or the lighting end time is output to the ultraviolet irradiation device 1 via the transmitter 53 .

The clock unit 52 clocks the current time. Transmission unit 53 transmits an infrared signal in which the control instruction received by operation unit 51 is associated with the current time. The storage unit 54 stores programs for realizing various controls of the terminal device 50 .

As described above, the ultraviolet irradiation device 1 includes the reception unit 21 that receives control according to the received infrared signal when the light receiving unit 5 that receives the infrared light receives the infrared signal from the terminal device 50 . Thereby, user convenience can be improved.

Note that the terminal device 50 may have, for example, a display unit (not shown) that displays the operation content of the operation unit 51 . Further, the terminal device 50 may have an operation control unit such as a touch panel in which the operation unit 51 and the display unit are integrated, for example.

Next, a processing procedure executed by the ultraviolet irradiation device 1 according to the first embodiment will be described with reference to FIG. 3 . FIG. 3 is a flowchart illustrating an example of a processing procedure executed by the ultraviolet irradiation device according to the first embodiment;

The light receiving unit 5 of the ultraviolet irradiation device 1 receives infrared rays (step S11). The first sensor 3 determines whether or not the light receiving section 5 has received the infrared signal from the terminal device 50 (step S12). When the light receiving unit 5 receives the infrared signal (step S12, Yes), the receiving unit 21 receives control according to the received infrared signal (step S13), and repeats the processes after step S12.

When the light receiving unit 5 does not receive the infrared signal (step S12, No), the light receiving unit 5 continues sensor detection as the first sensor 3, which is a proximity sensor (step S14), and the first sensor 3 detects proximity. It is determined whether or not (step S15). When the first sensor 3 detects the proximity (step S15, Yes), the reception unit 21 terminates the lighting of the ultraviolet light source 2 via the lighting control unit 23 (step S16). And when the 1st sensor 3 does not detect proximity|contact (step S15, No), the ultraviolet irradiation device 1 returns to step S12, and performs subsequent processes repeatedly.

(Modification of the ultraviolet irradiation device according to the first embodiment)
FIG. 4 is a block diagram showing an example of the configuration of an ultraviolet irradiation device according to a modification of the first embodiment; As shown in FIG. 4, the ultraviolet irradiation device 1A according to this modification differs from the ultraviolet irradiation device 1 according to the first embodiment in that it has a clock 40a instead of the timer 40. FIG.

Clock 40a is, for example, a real-time clock. Since the ultraviolet irradiation device 1A has the clock 40a, for example, acquisition of the current time from the terminal device 50 becomes unnecessary, thereby improving convenience.

[Second embodiment]
FIG. 5 is a diagram showing an example of an ultraviolet irradiation device according to the second embodiment. FIG. 6 is a block diagram showing an example of the configuration of an ultraviolet irradiation device according to the second embodiment.

As shown in FIGS. 5 and 6, the ultraviolet irradiation device 1B according to the second embodiment has a third sensor 3A instead of the first sensor 3 as a proximity sensor, which is the same as the first embodiment. It is different from the ultraviolet irradiation device 1 according to The third sensor 3A is a distance sensor and measures the distance from the ultraviolet light source 2 to the irradiation target. The third sensor 3A can measure the distance, for example, by having the light receiving section 5A receive the reflected light of the infrared rays emitted from the light emitting section 4A and reflected by the irradiation target.

The distance to the irradiation target measured by the third sensor 3A can be used to set or change the lighting pattern of the ultraviolet light source 2, for example. As shown in FIG. 6, distance information 34 is stored in the storage unit 30 of the ultraviolet irradiation device 1B.

FIG. 7 is a diagram showing an example of distance information. As shown in FIG. 7, the distance information 34 is associated with "distance to irradiation target" and "lighting pattern". "Distance to irradiation target" is the distance to the irradiation target measured by the third sensor 3A. “Lighting pattern” indicates a pattern ID specifying one of the plurality of lighting patterns stored in the pattern information 31 .

For example, when the distance to the irradiation target measured by the third sensor 3A is equal to or less than the threshold value α, the reception unit 21 refers to the distance information 34 and turns off the ultraviolet light source 2 through the lighting control unit 23 . When the distance to the irradiation target measured by the third sensor 3A is equal to or greater than the threshold value β, the reception unit 21 refers to the distance information 34 and sets the lighting pattern of the ultraviolet light source 2 to "0002" through the lighting control unit 23. or change.

The irradiation target, which is the target of distance measurement by the third sensor 3A, may be, for example, an object or a person. When the irradiation target is an object, the third sensor 3A can be used, for example, for initial setting of the lighting pattern when the ultraviolet irradiation device 1B is installed. On the other hand, when the object to be irradiated is a person, the third sensor 3A can be used, for example, for stable management of the UV exposure amount in a manned environment in the UV irradiation device 1B after installation.

[Other Modifications]
In each of the above-described embodiments, the ultraviolet light source 2 is extinguished after the lighting is started, after the lighting continuation time has elapsed, or at the lighting end time, but the ultraviolet light source 2 may continue lighting. In such a case, the ultraviolet irradiation device can be operated in an unattended lighting mode in which the ultraviolet light source 2 is turned off when the second sensor 6 of the sensor section 10 detects a person.

Moreover, although the sensor unit 10 has two sensors in each of the above-described embodiments, it may have three or more sensors. For example, the sensor section 10 may have the first sensor 3, the second sensor 6 and the third sensor 3A.

As described above, the ultraviolet irradiation device 1 according to the embodiment includes the ultraviolet light source 2 , the sensor section 10 and the reception section 21 . The sensor unit 10 has a light receiving unit 5 that receives infrared rays. When the light receiving unit 5 receives an infrared signal from the terminal device 50, the receiving unit 21 receives control according to the received infrared signal. Thereby, user convenience can be improved.

Further, the receiving unit 21 according to the embodiment receives setting of the time when the ultraviolet light source 2 starts lighting. Thereby, user convenience can be improved.

The reception unit 21 according to the embodiment described below receives the setting of the time when the ultraviolet light source 2 is turned off. Thereby, user convenience can be improved.

The reception unit 21 according to the embodiment described below receives the setting of the time during which the ultraviolet light source 2 continues lighting. Thereby, user convenience can be improved.

The reception unit 21 according to the embodiment described below receives the setting of the current time. Thereby, user convenience can be improved.

The sensor unit 10 according to the embodiment described below includes a distance sensor (third sensor 3A) that measures the distance from the ultraviolet light source 2 to the irradiation target. The reception unit 21 receives the setting of the lighting pattern of the ultraviolet light source 2 according to the distance measured by the distance sensor. Thereby, user convenience can be improved.

The ultraviolet irradiation device 1B according to the embodiment described below turns off the ultraviolet light source 2 when the distance to the object to be irradiated is equal to or less than a threshold. Thereby, user convenience can be improved.

The receiving unit 21 according to the embodiment described below receives control according to the infrared signal received by the light receiving unit 5 when the ultraviolet light source 2 is turned off. As a result, it is possible to reduce malfunction of the ultraviolet irradiation device 1 due to erroneous detection of the infrared signal, thereby improving convenience for the user.

While embodiments of the invention have been described, the embodiments have been presented by way of example and are not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

1 Ultraviolet irradiation device 2 Ultraviolet light source 3 First sensor 4 Light emitting unit 5 Light receiving unit 6 Second sensor 7 Reporting unit 10 Sensor unit 20 Control unit 21 Reception unit 22 Sensor control unit 23 Lighting control unit 24 Information control unit 30 Storage unit 31 Pattern Information 32 Setting information 33 Notification information 34 Distance information 50 Terminal device 100 Ultraviolet irradiation system

Claims (8)

an ultraviolet light source;
a sensor unit having a light receiving unit that receives infrared light;
a reception unit that, when the light receiving unit receives an infrared signal from a terminal device, receives control according to the received infrared signal;
Ultraviolet irradiation device comprising. The ultraviolet irradiation device according to claim 1, wherein the reception unit receives setting of a time when the ultraviolet light source starts lighting. The ultraviolet irradiation device according to claim 2, wherein the reception unit receives setting of a time when the ultraviolet light source is turned off. The ultraviolet irradiation device according to claim 2, wherein the reception unit receives setting of a time during which the ultraviolet light source continues lighting. The ultraviolet irradiation device according to any one of claims 2 to 4, wherein the accepting unit accepts setting of current time. The sensor unit includes a distance sensor that measures the distance from the ultraviolet light source to the irradiation target,
The ultraviolet irradiation device according to any one of claims 1 to 5, wherein the reception unit receives setting of the lighting pattern of the ultraviolet light source according to the distance measured by the distance sensor. The ultraviolet irradiation device according to claim 6, wherein the ultraviolet light source is extinguished when the distance to the irradiation target is equal to or less than a threshold. The ultraviolet irradiation device according to any one of claims 1 to 7, wherein the receiving section receives control according to the infrared signal received by the light receiving section when the ultraviolet light source is turned off.

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