JP2022108662A - Ultraviolet light irradiation system - Google Patents

Abstract

To effectively perform cleaning of a space.SOLUTION: An ultraviolet light irradiation system 1 comprises: a human sensor 30 capable of detecting a person in an object space 11 inside a building 10; a UV light source 40 for irradiating the object space 11 with ultraviolet light; an illumination light source 50 for illuminating the object space 11 with illumination light that is visible light; and a controller 60 for controlling the UV light source 40 and the illumination light source 50 in interlock with each other. When the human sensor 30 detects no person, the controller 60 makes the UV light source 40 perform irradiation with ultraviolet light.SELECTED DRAWING: Figure 2

Description

The present invention relates to an ultraviolet light irradiation system.

In recent years, ultraviolet lamps have been used for sterilization purposes. For example, Patent Literature 1 discloses a bathroom antifungal device that includes a germicidal lamp that emits ultraviolet rays and a human body sensor that detects the presence or absence of a person. In the bathroom antifungal device, when the human body sensor detects a person, the germicidal lamp is turned off.

Japanese Utility Model Laid-Open No. 2-96143

With the increasing awareness of the environment, such as the effective use of energy resources, it is required to effectively clean the space by, for example, suppressing power consumption.

An object of the present invention is to provide an ultraviolet light irradiation system capable of effectively cleaning a space.

An ultraviolet light irradiation system according to one aspect of the present invention includes a first sensor capable of detecting a person in a first space inside a building, a first light source for irradiating the first space with ultraviolet light, and the first space a second light source that irradiates illumination light, which is visible light, to the light source; and a control device that interlocks and controls the first light source and the second light source. The control device causes the first light source to emit the ultraviolet light when the first sensor does not detect a person.

According to the ultraviolet light irradiation system according to the present invention, it is possible to effectively clean the space.

FIG. 1 is a plan view showing an example of the interior of a building to which an ultraviolet light irradiation system according to an embodiment is applied. FIG. 2 is a block diagram showing the configuration of the ultraviolet light irradiation system according to the embodiment. FIG. 3A is a flow chart showing the operation of the ultraviolet light irradiation system according to the embodiment. 3B is a flowchart showing a modification of the operation of the ultraviolet light irradiation system according to the embodiment; FIG. FIG. 4A is a plan view schematically showing the illumination state of each light source when there is no person in either the target space or the adjacent space. FIG. 4B is a plan view schematically showing the illumination state of each light source when a person is in the adjacent space. FIG. 4C is a plan view schematically showing the illumination state of each light source when a person is present in the target space. FIG. 5 is a plan view showing an example of the interior of a building to which the ultraviolet light irradiation system according to the modification of the embodiment is applied. FIG. 6 is a block diagram showing the configuration of an ultraviolet light irradiation system according to a modification of the embodiment. FIG. 7 is a plan view showing a collective toilet to which an ultraviolet light irradiation system according to a modification of the embodiment is applied.

Hereinafter, an ultraviolet light irradiation system according to an embodiment of the present invention will be described in detail with reference to the drawings. It should be noted that each of the embodiments described below is a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement and connection of components, steps, order of steps, etc. shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements not described in independent claims will be described as optional constituent elements.

Each figure is a schematic diagram and is not necessarily strictly illustrated. Therefore, for example, scales and the like do not necessarily match in each drawing. Moreover, in each figure, the same code|symbol is attached|subjected about the substantially same structure, and the overlapping description is abbreviate|omitted or simplified.

Also, in this specification, the term indicating the shape of the element and the numerical range are not expressions expressing only strict meanings, but substantially equivalent ranges, for example, meaning that it also includes a difference of about several percent. Expression.

(Embodiment)
[Overview]
First, an outline of an ultraviolet light irradiation system according to an embodiment will be described.

FIG. 1 is a diagram showing an example of the interior of a building 10 to which an ultraviolet light irradiation system according to this embodiment is applied. As shown in FIG. 1, building 10 includes target space 11 and adjacent space 12 .

The target space 11 is an example of a first space inside the building 10, and is a space irradiated with ultraviolet light by the ultraviolet light irradiation system 1 shown in FIG. That is, the target space 11 is a target space for cleaning with ultraviolet light. The target space 11 is provided with a UV light source 40 that emits ultraviolet light and an illumination light source 50 that emits illumination light that is visible light. The target space 11 is, for example, a bathroom, a toilet, a kitchen, a living room, a bedroom, a walking closet, or the like, but is not particularly limited as long as it is a space that a person can enter.

A target space 11 is provided with a door 13 through which a person enters and exits. The door 13 partitions the target space 11 and the adjacent space 12 so that they can be opened and closed. By opening the door 13, a person can enter and exit between the target space 11 and the adjacent space 12. - 特許庁Note that the door 13 may not be provided.

The adjacent space 12 is an example of a second space that is adjacent to the target space 11 and allows people to enter and exit from each other. The adjacent space 12 is provided with an illumination light source 51 that emits visible illumination light. The adjacent space 12 is, for example, a dressing room, a hallway, or a living room, but is not particularly limited as long as it is a space that a person can enter.

The adjoining space 12 is provided with a door 14 for people to enter and exit. The door 14 partitions the adjacent space 12 and another space so that it can be opened and closed. By opening the door 14, the adjacent space 1
2 can be entered and exited. The outside of the door 14 may be the inside of the building 10 or the outside of the building 10 . Also, the adjacent space 12 is a space inside the building 10 , but may be a space outside the building 10 . Note that the door 14 may not be provided.

As shown in FIG. 1 , a human sensor 30 capable of detecting a person in the target space 11 is provided inside the building 10 . The ultraviolet light irradiation system 1 according to the present embodiment cleans the target space 11 and illuminates the target space 11 and the adjacent space 12 based on the detection result of the human sensor 30 . Specifically, the ultraviolet light irradiation system 1 can effectively purify and illuminate the space depending on the presence or absence of people.

[Constitution]
Next, a specific configuration of the ultraviolet light irradiation system 1 according to this embodiment will be described with reference to FIG. 2 .

FIG. 2 is a block diagram showing the configuration of the ultraviolet light irradiation system 1 according to this embodiment. As shown in FIG. 2, the ultraviolet light irradiation system 1 includes a human sensor 30, a UV light source 40, illumination light sources 50 and 51, a control device 60, a notification device 70, and a transmission device 80. .

The human sensor 30 is an example of a first sensor capable of detecting a person in the target space 11 . In the present embodiment, human sensor 30 can further detect a person in adjacent space 12 . That is, the detection range of the human sensor 30 includes at least part of the target space 11 and at least part of the adjacent space 12 .

The human sensor 30 outputs a detection result indicating that a human is detected when a human exists in either the target space 11 or the adjacent space 12 . At this time, the human sensor 30 may be capable of distinguishing between the target space 11 and the adjacent space 12 for detection. That is, the detection result may include information indicating whether the detected person is in the target space 11 or the adjacent space 12 . The human sensor 30 is, for example, a human sensor using infrared light. Alternatively, the people sensor 30 may be an image sensor that receives visible light or a thermal image sensor.

The UV light source 40 is an example of a first light source that irradiates the target space 11 with ultraviolet light. Ultraviolet light is light having a peak in a wavelength range that has a sterilizing effect. Specifically, the ultraviolet light is UV-C light having a peak in the wavelength range of 200 nm or more and 280 nm or less. For example, the peak wavelength of ultraviolet light is 250 nm, but it is not limited to this. The UV light source 40 is an LED (Light Emitting Diode) or a discharge lamp.

The UV light source 40 irradiates ultraviolet light to the wall surface, floor surface, and ceiling surface forming the target space 11, as well as furniture placed in the target space 11, so that bacteria and / or viruses attached to these are removed. render harmless. Bacteria to be detoxified include, for example, Escherichia coli, Legionella, Salmonella, and the like. Viruses targeted for detoxification include coronaviruses, influenza viruses, and noroviruses. Irradiation with ultraviolet light can also suppress the growth of fungi such as mold.

In addition, "detoxification" means not only to completely remove bacteria and / or viruses, but also to reduce the number of bacteria and / or viruses, simply "sterilization" or "sterilization" Also described. "99.9% sterilization" means that the sterilization rate is 99.9% or more, and that the number of bacteria (or the number of viruses) is reduced to 0.1% or less.

The UV light source 40 is installed, for example, on the ceiling of the target space 11 and emits ultraviolet light toward the floor. Alternatively, the UV light source 40 may be installed on the wall or floor of the target space 11 or attached to the door 13 . Further, the UV light source 40 may irradiate the entire target space 11 with ultraviolet light, or may locally irradiate a part of the target space 11 with ultraviolet light.

The illumination light source 50 is an example of a second light source that irradiates the target space 11 with illumination light. The illumination light is, for example, white light. The illumination light sources 50 are LEDs or discharge lamps.

The illumination light source 51 is an example of a third light source that irradiates the adjacent space 12 with illumination light. The illumination light is, for example, white light. The illumination light source 51 is an LED or a discharge lamp.

The illumination light sources 50 and 51 are installed, for example, on the ceiling of the target space 11 or the adjacent space 12, and emit illumination light toward the floor surface. The illumination light sources 50 and 51 are ceiling lights, pendant lights or base lights, but may be downlights or spotlights. Also, the illumination light sources 50 and 51 may be bracket lights installed on the wall, or may be floor lights installed on the floor.

The control device 60 interlocks and controls the UV light source 40 and the illumination light source 50 . In this embodiment, the control device 60 controls the UV light source 40 and the illumination light sources 50 and 51 in conjunction with each other. “Interlocking” means that the control details of a plurality of light sources are changed substantially at the same timing. For example, the control device 60 turns on or off one light source and turns on or off another light source at substantially the same timing. The same timing here may have a lag of about several seconds.

Note that "turning on" means irradiating (emitting) light from the light source, and "turning off" means stopping the irradiation (emitting) of light from the light source. In addition, "stopping irradiation" means not only switching from a lighting state to a lighting-out state, but also maintaining a state in which light is not irradiated (that is, lighting-out state).

In this embodiment, the control device 60 interlocks and controls the UV light source 40 and the illumination light sources 50 and 51 based on the detection result of the human sensor 30 . Specifically, the controller 60 causes the UV light source 40 to emit ultraviolet light when the human sensor 30 does not detect a human. Further, the control device 60 causes the illumination light sources 50 and 51 to stop emitting illumination light when the human sensor 30 does not detect a person. For example, when the human sensor 30 does not detect a person in the target space 11, the control device 60 causes the illumination light source 50 to stop emitting illumination light. When the human sensor 30 does not detect a person in the adjacent space 12, the controller 60 causes the illumination light source 51 to stop emitting illumination light.

For example, after turning on the UV light source 40, the control device 60 turns off the UV light source 40 after a predetermined period of time has elapsed. For example, the control device 60 causes the UV light source 40 to irradiate ultraviolet light with an irradiance of 1 W/m ² or more for a time of 30 seconds or more. This allows for 99.9% kill against major bacteria and viruses. The irradiance and irradiation time are merely examples, and are not particularly limited as long as sterilization is possible. The control device 60 may be able to change the irradiation energy and irradiation time of the ultraviolet light from the UV light source 40 .

Further, when the human sensor 30 detects a person, the control device 60 causes the UV light source 40 to stop emitting ultraviolet light and causes the illumination light source 50 to emit illumination light. For example, when the human sensor 30 detects a person in the target space 11, the control device 60 causes the UV light source 40 to stop emitting ultraviolet light and causes the illumination light source 50 to emit illumination light. Further, for example, when the human sensor 30 detects a person in the adjacent space 12, the control device 60 causes the UV light source 40 to stop emitting ultraviolet light and causes the illumination light source 51 to emit illumination light.

The control device 60 is included in, for example, an operation panel attached to the wall surface of the building 10, but is not limited to this. Controller 60 may be embedded within a wall, floor, or ceiling.

The control device 60 is implemented by, for example, an LSI (Large Scale Integration), which is an integrated circuit (IC). Note that the integrated circuit is not limited to an LSI, and may be a dedicated circuit or a general-purpose processor. For example, controller 60 may be a microcontroller. The processor or microcontroller includes, for example, a nonvolatile memory storing programs, a volatile memory that is a temporary storage area for executing programs, an input/output port, a processor executing programs, and the like. Also, the control device 60 may be a programmable FPGA (Field Programmable Gate Array) or a reconfigurable processor in which connections and settings of circuit cells in an LSI can be reconfigured. The functions executed by control device 60 may be implemented in software or hardware.

The notification device 70 notifies the surroundings of the operating state of the UV light source 40 . For example, the notification device 70 is a light source that emits visible light, and is attached near the door 13 in the adjacent space 12 as shown in FIG. Note that the notification device 70 may be attached near the door 14 outside the adjacent space 12 .

The notification device 70 emits visible light when the UV light source 40 is on. Thereby, the notification device 70 can notify a person in the adjacent space 12 or a person trying to enter the adjacent space 12 that the target space 11 is being irradiated with ultraviolet light. . Note that the notification device 70 may be a speaker, and may notify the irradiation state of the ultraviolet light by a voice or an alarm sound.

The transmission device 80 transmits operation information indicating the operation state of the UV light source 40 to a preset transmission destination. The transmitter 80 is included in, for example, an operation panel attached to the wall surface of the building 10, but is not limited to this. Transmitting device 80 may be embedded within a wall, floor, or ceiling.

The destination is, for example, the e-mail address of the user of the target space 11 . Thereby, the user can obtain the operation information using a communication device such as a mobile phone, a tablet terminal, or a PC, and can know the operation state. It may be a control panel for the illumination light sources 50 and 51 provided inside the building 10 . The transmission device 80 can communicate wirelessly or by wire.

[motion]
Next, the operation of the ultraviolet light irradiation system 1 will be described.

FIG. 3A is a flowchart showing the operation of the ultraviolet light irradiation system 1. FIG. FIG. 3A shows main operations of the controller 60 in the ultraviolet light irradiation system 1. FIG.

As shown in FIG. 3A, when the human sensor 30 does not detect a person in the adjacent space 12 (No in S10), the controller 60 stops illuminating the adjacent space 12 (S11). Specifically, the control device 60 causes the illumination light source 51 to stop emitting illumination light.

Further, when the human sensor 30 does not detect a person in the target space 11 (No in S12), the control device 60 stops illuminating the target space 11 (S13). Specifically, the control device 60 causes the illumination light source 50 to stop emitting illumination light. Next, the controller 60 causes the UV light source 40 to emit ultraviolet light (S14). In this manner, the stop of illumination light irradiation (S13) and the ultraviolet light irradiation (S14) are performed in conjunction with each other. It should be noted that the stopping of illumination light irradiation (S13) and the ultraviolet light irradiation (S14) may be performed at the same time. Alternatively, the ultraviolet light irradiation (S14) may be performed prior to the stop of the illumination light irradiation (S13).

The control device 60 waits until a predetermined period of time elapses (No in S15). During this predetermined period, the UV light source 40 continues to emit ultraviolet light. If the predetermined period has passed (Yes in S15), the controller 60 causes the UV light source 40 to stop irradiating ultraviolet light (S16). The predetermined period here is the irradiation period of the ultraviolet light, and is, for example, a period of 30 seconds or longer. As an example, the irradiation period is 1 minute, but is not limited to this. It should be noted that the control device 60 turns on the notification device 70 during the irradiation period of the ultraviolet light. Further, the control device 60 causes the transmission device 80 to transmit information indicating that the UV light source 40 is on at the time when the ultraviolet light irradiation is started. Further, the control device 60 may cause the transmitting device 80 to transmit information indicating that the lighting of the UV light source 40 has ended when the irradiation of the ultraviolet light ends.

When the human sensor 30 detects a person in the target space 11 (Yes in S12), the controller 60 causes the UV light source 40 to stop irradiating ultraviolet light (S17). Next, the control device 60 causes the illumination light source 50 to irradiate the target space 11 with illumination light (S18). In this manner, the termination of ultraviolet light irradiation (S17) and the irradiation of illumination light (S18) are performed in conjunction with each other. It should be noted that the termination of the irradiation of the ultraviolet light (S17) and the irradiation of the illumination light (S18) may be performed at the same time. Alternatively, the illumination light irradiation (S18) may be performed before the ultraviolet light irradiation is stopped (S17).

When the human sensor 30 detects a person in the adjacent space 12 (Yes in S10), the controller 60 causes the UV light source 40 to stop emitting ultraviolet light (S19). Next, the control device 60 causes the illumination light source 51 to irradiate the adjacent space 12 with illumination light (S20). In this manner, the termination of ultraviolet light irradiation (S19) and the irradiation of illumination light (S20) are performed in conjunction with each other. It should be noted that the termination of the irradiation of the ultraviolet light (S19) and the irradiation of the illumination light (S20) may be performed at the same time. Alternatively, the illumination light irradiation (S20) may be performed before the ultraviolet light irradiation is stopped (S19).

After the irradiation of the ultraviolet light is stopped and the illumination light is irradiated (after S16, S18 or S20), the control device 60 waits until a predetermined period of time elapses (No in S21). If the predetermined period has passed (Yes in S21), the process is repeated from step S10. The predetermined period here is a waiting period for repeated irradiation of ultraviolet light, and is, for example, one hour. That is, when no person is detected in either the target space 11 or the adjacent space 12, the ultraviolet light is automatically and repeatedly irradiated every hour. Thereby, the target space 11 can always be kept clean. Note that the process shown in FIG. 3A may be manually started based on an instruction from a person.

The human sensor 30 always performs human detection processing. For example, when the human sensor 30 detects a person while waiting while irradiating ultraviolet light in step S15, the irradiation of ultraviolet light is stopped (S17 or S19) as in the case of Yes in step S10 or S12. ) and illumination light irradiation (S18 or S20) are performed. This can sufficiently reduce the possibility of people being exposed to ultraviolet light.

In the example shown in FIG. 1, the door 13 is the only entrance through which the object space 11 can be entered. In other words, in order for a person to enter/exit the target space 11 , they must pass through the adjacent space 12 . Below, the illumination state of each light source will be described using FIGS. .

First, the case where the person 20 exists outside the adjacent space 12 will be described with reference to FIG. 4A. FIG. 4A is a plan view schematically showing the illumination state of each light source when there is no person in either the target space 11 or the adjacent space 12. FIG.

As shown in FIG. 4A, no person 20 exists in either the target space 11 or the adjacent space 12 . In this case, since the human sensor 30 does not detect the human 20 (No in S10 of FIG. 3A and No in S12), both the illumination light sources 50 and 51 stop emitting illumination light, and the UV light source 40 emits ultraviolet light. In FIGS. 4A to 4C, a light source that is emitting light (that is, a light source that is on) is indicated by “ON”, and a light source that is not emitting light (that is, a light source that is off) is indicated by “OFF”. ”.

In this way, since the irradiation of the illumination light is stopped in the target space 11 and the adjacent space 12 where the person 20 is not present, wasteful power consumption can be reduced. In addition, since the target space 11 is irradiated with ultraviolet light, the target space 11 can be cleaned while avoiding the irradiation of the person 20 with the ultraviolet light.

Note that the notification device 70 is turned on to notify the surroundings that the ultraviolet light is being irradiated. For example, when the person 20 opens the door 14, the person 20 can visually confirm that the notification device 70 is lit, and know that the target space 11 is irradiated with ultraviolet light.

Next, the case where the person 20 enters the adjacent space 12 through the door 14 will be described with reference to FIG. 4B. FIG. 4B is a plan view schematically showing the illumination state of each light source when a person is present in the adjacent space 12. FIG.

Since the human sensor 30 detects the person 20 in the adjacent space 12 (Yes in S10 of FIG. 3A), the illumination light source 51 in the adjacent space 12 emits illumination light. In this case, the UV light source 40 stops emitting ultraviolet light. In addition, the illumination light source 50 in the target space 11 is maintained in the off state.

In this way, since the adjacent space 12 where the person 20 is present is illuminated with illumination light, the person 20 can be provided with a comfortable illumination space. Since the irradiation of illumination light is stopped in the target space 11 where the person 20 is not present, wasteful power consumption can be reduced. Also, when the person 20 enters the adjacent space 12, the irradiation of the ultraviolet light that has been irradiated in the target space 11 is stopped. Therefore, even if the door 13 is open and the ultraviolet light leaks into the adjacent space 12, the irradiation of the ultraviolet light can be stopped before the person 20 is irradiated with the ultraviolet light. can. Therefore, irradiation of the person 20 with ultraviolet light is suppressed, and the target space 11 can be cleaned while ensuring safety for the person 20 .

In addition, since the irradiation of the ultraviolet light is stopped, the notification device 70 is turned off. Therefore, the person 20 in the adjacent space 12 can know that the object space 11 is not illuminated with illumination light by visually confirming that the notification device 70 is not lit. Therefore, the person 20 can enter the target space 11 with peace of mind.

Next, the case where the person 20 enters the target space 11 through the door 13 will be described with reference to FIG. 4C. FIG. 4C is a plan view schematically showing the irradiation state of each light source when the person 20 is present in the target space 11. FIG.

Since the human sensor 30 detects the person 20 in the target space 11 (Yes in S12 of FIG. 3A), the illumination light source 50 in the target space 11 emits illumination light. In this case, the UV light source 40 is maintained in a state in which the ultraviolet light is turned off.

In this way, since illumination light is emitted in the target space 11 where the person 20 is present, the person 20 can be provided with a comfortable illumination space. Note that the control device 60 may stop the irradiation of the illumination light from the illumination light source 51 in the adjacent space 12 . As a result, the irradiation of the illumination light can be stopped in the adjacent space 12 where the person 20 is not present, so that wasteful power consumption can be reduced.

In the present embodiment, an example in which the target space 11 cannot be entered without passing through the adjacent space 12 is shown, but an entrance directly entering the target space 11 may be provided. Even in this case, when the person 20 is detected in the target space 11 (Yes in S12 of FIG. 3A), the ultraviolet light irradiation is stopped. can be lowered to

Note that if the illumination light source 51 is not provided, the processes of steps S11 and S20 are omitted in FIG. 3A. Further, instead of the illumination light sources 50 and 51, when an illumination light source (for example, an illumination light source 150 shown in FIG. 7 described later) that illuminates both the target space 11 and the adjacent space 12 is provided , step S11 is omitted.

FIG. 3B shows the operation when the human sensor 30 cannot distinguish between the target space 11 and the adjacent space 12. FIG. FIG. 3B is a flowchart showing a modification of the operation of the ultraviolet light irradiation system 1 according to this embodiment. As shown in FIG. 3B , when the human sensor 30 does not detect a person in either the target space 11 or the adjacent space 12 (No in S30), the control device 60 controls both the target space 11 and the adjacent space 12. Irradiation of illumination light is stopped (S31). Subsequent processing is the same as the processing shown in FIG. 3A. When the human sensor 30 detects a person in either the target space 11 or the adjacent space 12 (Yes in S30), the controller 60 causes the UV light source 40 to stop emitting ultraviolet light (S17). Next, the control device 60 illuminates both the target space 11 and the adjacent space 12 (S32).

[Effects, etc.]
As described above, the ultraviolet light irradiation system 1 according to the present embodiment includes the human sensor 30 capable of detecting a person in the target space 11 inside the building, the UV light source 40 for irradiating the target space 11 with ultraviolet light, An illumination light source 50 for irradiating the target space 11 with illumination light, which is visible light, and a control device 60 for interlocking and controlling the UV light source 40 and the illumination light source 50 . The controller 60 causes the UV light source 40 to emit ultraviolet light when the human sensor 30 does not detect a human.

As a result, not only the UV light source 40 but also the illumination light source 50 are controlled in conjunction with each other. In addition, when the person 20 is not detected, the target space 11 is irradiated with ultraviolet light, so the target space 11 can be cleaned effectively.

Further, for example, when the human sensor 30 does not detect a person, the control device 60 causes the illumination light source 50 to stop emitting illumination light.

As a result, when the person 20 is not detected, unnecessary power consumption can be suppressed by stopping the emission of the illumination light from the illumination light source 50 .

Further, for example, when the human sensor 30 detects a person, the control device 60 causes the UV light source 40 to stop emitting ultraviolet light and causes the illumination light source 50 to emit illumination light.

As a result, when the person 20 is detected, the irradiation of the ultraviolet light is stopped, so that the person 20 can be suppressed from being irradiated with the ultraviolet light. Therefore, the target space 11 can be cleaned while ensuring the safety of the human body.

Further, for example, the human sensor 30 can further detect a person in an adjacent space 12 adjacent to the target space 11 and through which people can enter and exit from each other.

Thereby, the UV light source 40 and the illumination light source 50 can be controlled when the person 20 enters the adjacent space 12 even if the person 20 does not enter the target space 11 .

Further, for example, when a person in the adjacent space 12 is detected, the control device 60 causes the UV light source 40 to stop emitting ultraviolet light.

This makes it possible to stop the irradiation of the ultraviolet light before the person 20 enters the target space 11 . Since the possibility that the person 20 is exposed to ultraviolet light can be sufficiently reduced, the target space 11 can be cleaned in a safer state.

Further, for example, the ultraviolet light irradiation system 1 further includes an illumination light source 51 that irradiates the adjacent space 12 with illumination light.

As a result, not only the UV light source 40 and the illumination light source 50 but also the illumination light source 51 are interlocked and controlled.

Further, for example, the control device 60 causes the UV light source 40 to irradiate the UV light for a preset period of time, and then stops the irradiation of the ultraviolet light.

As a result, it is possible to irradiate the ultraviolet light only for a period sufficient for sterilization, so power consumption can be suppressed.

Further, for example, the ultraviolet light irradiation system 1 includes a notification device 70 that notifies the surroundings of the operating state of the UV light source 40 .

This makes it possible to make it easier for the outside to understand the irradiation state of the ultraviolet light.

Further, for example, the ultraviolet light irradiation system 1 includes a transmission device 80 that transmits operation information indicating the operation state of the UV light source 40 to a preset destination.

As a result, it is possible to notify the predetermined transmission destination of the ultraviolet light irradiation status.

[Modification]
Next, a modified example of the embodiment will be described. In the following description, differences from the embodiment will be mainly described, and descriptions of common points will be omitted or simplified.

In the embodiment, one human sensor 30 whose detection range covers both the target space 11 and the adjacent space 12 is shown, but the present invention is not limited to this. A sensor for detecting a person may be provided for each space.

FIG. 5 is a diagram showing an example of the interior of a building to which the ultraviolet light irradiation system according to the modification is applied. As shown in FIG. 5 , the target space 11 is provided with a first human sensor 130 capable of detecting a person in the target space 11 . A second human sensor 135 capable of detecting a person in the adjacent space 12 is provided in the adjacent space 12 .

FIG. 6 is a block diagram showing the configuration of an ultraviolet light irradiation system 101 according to a modification. Figure 6
2, the ultraviolet light irradiation system 101 includes a first human sensor 130 and a second human sensor 135 instead of the human sensor 30 compared to the ultraviolet light irradiation system 1 shown in FIG.

The first person sensor 130 is an example of a first sensor capable of detecting a person in the target space 11 . At least part of the target space 11 is included in the detection range of the first person sensor 130 . The adjacent space 12 is not included in the detection range of the first person sensor 130 .

The second human sensor 135 is an example of a second sensor capable of detecting a person in the adjacent space 12 . At least part of the adjacent space 12 is included in the detection range of the second human sensor 135 . The target space 11 is not included in the detection range of the second human sensor 135 .

In a modified example, the control device 60 acquires detection results of the first human sensor 130 and the second human sensor 135 having different detection ranges. The control device 60 can easily determine in which of the target space 11 and the adjacent space 12 the person was detected by determining which sensor detected the person.

As described above, the ultraviolet light irradiation system 101 according to the modification includes the second human sensor 135 capable of detecting a person in the adjacent space 12 adjacent to the target space 11 and allowing people to enter and exit from each other. The control device 60 causes the UV light source 40 to emit ultraviolet light when the second sensor 135 does not detect a person and the first sensor 130 does not detect a person.

This makes it possible to easily determine in which of the target space 11 and the adjacent space 12 a person has been detected. A space in which a person is detected can be determined with high accuracy, and irradiation and stop of each of illumination light and ultraviolet light can be controlled with high accuracy.

Also, the target space 11 and the adjacent space 12 may be spaces connected to each other other than the door 13 . For example, the target space 11 and the adjacent space 12 may not be separated by a wall, and may be connected to each other near the ceiling and floor. As an example, the ultraviolet light irradiation system 101 can be used in public toilets, as shown in FIG.

FIG. 7 is a plan view showing a collective toilet 110 to which an ultraviolet light irradiation system according to a modification of the embodiment is applied. In the example shown in FIG. 7, the collective toilet 110 includes three private rooms 111a-111c and a hand-washing space 112. In the example shown in FIG. Each of the three private rooms 111a to 111c is an example of the target space. The hand-washing space 112 is an example of an adjacent space. The hand-washing space 112 is adjacent to each of the three private rooms 111a-111c via doors 113a-113c. A door 114 is provided for entering and exiting the hand wash space 112 . The number and arrangement of private rooms are not particularly limited.

Private rooms 111a to 111c are provided with first human sensors 130a to 130c capable of detecting a person in the corresponding private room, respectively. This makes it possible to determine the presence or absence of a person in each private room. A second human sensor 135 is provided in the hand-washing space 112 . A second person sensor 135 can detect a person in the hand-washing space 112 .

UV light sources 140a to 140c are provided on the ceilings of the private rooms 111a to 111c, respectively. The UV light sources 140a to 140c irradiate ultraviolet light into the corresponding individual chambers. In addition, one UV light source may irradiate ultraviolet light toward all the private rooms.

Notification devices 170a to 170c are provided near the doors 113a to 113c. The notification devices 170a-170c respectively notify the operating status of the corresponding UV light sources 140a-140c. As a result, it is possible to notify the surroundings of which private room is being irradiated with ultraviolet light. Note that only one notification device may be provided to notify the surroundings when at least one of the three UV light sources 140a to 140c is lit.

The illumination light source 150 is provided on the ceiling of the washroom space 112, and illuminates not only the washroom space 112 but also the private rooms 111a to 111c. For example, the private rooms 111a to 111c and the hand washing space 112 are connected without being separated near the ceiling. Therefore, the illumination light emitted from the illumination light source 150 is also applied to the private rooms 111a to 111c.

In this way, the illumination light source 150 may irradiate illumination light not only to the target space but also to adjacent spaces. Thereby, the whole collective toilet 110 can be illuminated with one illumination light source 150 . A light source for illumination may be provided in each of the private rooms 111a to 111c.

In the example shown in FIG. 7, when the second human sensor 135 detects a person in the hand-washing space 112, the illumination light source 150 is turned on and the UV light sources 140a-140c are turned off. When the first human sensors 130a-130c detect a person in any of the private rooms 111a-111c, the UV light sources 140a-140c are turned off.

Note that when the private room 111a is the target space, the private room 111b can be regarded as an adjacent space to the private room 111a as well as the hand-washing space 112. For example, when the first person sensor 130b and the second person sensor 135 do not detect a person, that is, when there is no person in the private room 111b and the hand washing space 112, the UV light source 140a in the private room 111a emits ultraviolet light. good too. At this time, even if the first person sensor 130c detects a person in the private room 111c, the UV light source 140a may irradiate the inside of the private room 111a with ultraviolet light. This is because the private room 111c is adjacent to the private room 111b and the hand-washing space 112, but is not adjacent to the private room 111a. Similarly, when a person is detected only in the private room 111a, the UV light source 140c may emit ultraviolet light in the private room 111c.

In addition, when there is no gap between the walls separating the private rooms 111a to 111c, that is, when there is no possibility that the ultraviolet light emitted from the UV light source 140a of the private room 111a leaks into the private room 111b, the private rooms 111a and 111b are directly connected to each other. One can not be regarded as an adjacent space to the other because it cannot be entered and exited. In this case, even if there is a person in the private room 111b, the UV light source 140a of the private room 111a and the UV light source 140c of the private room 111c may emit ultraviolet light.

Although an example in which the ultraviolet light irradiation system 101 is applied to the collective toilet 110 has been described, the present invention is not limited to this. For example, the ultraviolet light irradiation system 101 may be applied to a communal bathroom provided with a plurality of shower rooms. Alternatively, the ultraviolet light irradiation system 101 may be applied to a space such as a rental office or study room in which a front room (adjacent space) such as a waiting room and a plurality of individual booths (target space) are provided.

(others)
As described above, the ultraviolet light irradiation system according to the present invention has been described based on the above embodiments and the like, but the present invention is not limited to the above embodiments.

For example, in the above-described embodiment, when a person is detected in the adjacent space 12, the control device 60 causes the UV light source 40 to stop emitting ultraviolet light, but the present invention is not limited to this. The control device 60 may stop irradiation of ultraviolet light when a person is detected in the target space 11 regardless of the detection result of the person in the adjacent space 12 . In this case, the human sensor 30 may not have a detection range in the adjacent space 12 .

Further, for example, the ultraviolet light irradiation system 1 may not include at least one of the notification device 70 and the transmission device 80 .

Also, the communication method between the devices described in the above embodiments is not particularly limited. When wireless communication is performed between devices, the wireless communication method (communication standard) is, for example, ZigBee (registered trademark), Bluetooth (registered trademark), or short-range wireless communication such as wireless LAN (Local Area Network). be. Alternatively, the wireless communication method (communication standard) may be communication via a wide area communication network such as the Internet. Also, wire communication may be performed between devices instead of wireless communication. Wired communication is, specifically, communication using power line communication (PLC: Power Line Communication) or wired LAN.

Further, in the above-described embodiments, the processing executed by a specific processing unit may be executed by another processing unit. Also, the order of multiple processes may be changed, or multiple processes may be executed in parallel. Also, the distribution of the constituent elements included in the ultraviolet light irradiation system 1 to a plurality of apparatuses is an example. For example, a component included in one device may be included in another device.

For example, the processing mainly executed by the control device 60 in the above embodiment may be realized by centralized processing using a single device (system), or distributed processing using a plurality of devices. It may be realized by Also, the number of processors executing the above program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

Further, in the above embodiment, all or part of the components such as the control device 60 may be configured with dedicated hardware, or may be realized by executing a software program suitable for each component. may Each component is implemented by a program execution unit such as a CPU (Central Processing Unit) or processor reading and executing a software program recorded in a recording medium such as an HDD (Hard Disk Drive) or semiconductor memory. good.

Also, components such as the controller 60 may be composed of one or more electronic circuits. Each of the one or more electronic circuits may be a general-purpose circuit or a dedicated circuit.

One or more electronic circuits may include, for example, a semiconductor device, an IC, or an LSI. An IC or LSI may be integrated on one chip or may be integrated on a plurality of chips. Although they are called ICs or LSIs here, they may be called system LSIs, VLSIs (Very Large Scale Integrations), or ULSIs (Ultra Large Scale Integrations) depending on the degree of integration. Also, an FPGA that is programmed after the LSI is manufactured can be used for the same purpose.

Also, general or specific aspects of the invention may be implemented in a system, apparatus, method, integrated circuit or computer program product. Alternatively, the computer program may be implemented by a computer-readable non-temporary recording medium such as an optical disc, HDD, or semiconductor memory. Also, any combination of systems, devices, methods, integrated circuits, computer programs and recording media may be implemented.

In addition, it is realized by applying various modifications to each embodiment that a person skilled in the art can think of, and by arbitrarily combining the constituent elements and functions of each embodiment without departing from the spirit of the present invention. Forms are also included in the present invention.

1, 101 Ultraviolet light irradiation system 10 Building 11 Target space (first space)
12 adjacent space (second space)
13, 113a, 113b, 113c door 20 person 30 person sensor (first sensor)
40, 140a, 140b, 140c UV light source (first light source)
50, 150 Illumination light source (second light source)
51 Illumination light source (third light source)
60 control device 70, 170a, 170b, 170c notification device 80 transmission device 110 collective toilet 111a, 111b, 111c private room (first space)
112 Hand washing space (Second space)
130, 130a, 130b, 130c first person sensor (first sensor)
135 second person sensor (second sensor)

Claims (11)

a first sensor capable of detecting a person in the first space inside the building;
a first light source that irradiates the first space with ultraviolet light;
a second light source that irradiates the first space with illumination light that is visible light;
a control device that interlocks and controls the first light source and the second light source,
The control device causes the first light source to irradiate the ultraviolet light when the first sensor does not detect a person.
Ultraviolet light irradiation system. The control device further causes the second light source to stop emitting the illumination light when the first sensor does not detect a person.
The ultraviolet light irradiation system according to claim 1. When the first sensor detects a person, the control device causes the first light source to stop irradiating the ultraviolet light and causes the second light source to irradiate the illumination light.
The ultraviolet light irradiation system according to claim 1 or 2. The first sensor is further capable of detecting a person in a second space adjacent to the first space and allowing people to enter and exit each other.
The ultraviolet light irradiation system according to any one of claims 1 to 3. Furthermore, a second sensor capable of detecting a person in a second space adjacent to the first space and allowing people to enter and exit from each other is provided,
The control device causes the first light source to emit the ultraviolet light when the second sensor does not detect a person and the first sensor does not detect a person.
The ultraviolet light irradiation system according to any one of claims 1 to 3. The control device causes the first light source to stop irradiating the ultraviolet light when a person in the second space is detected.
The ultraviolet light irradiation system according to claim 4 or 5. The second light source further irradiates the second space with the illumination light,
The ultraviolet light irradiation system according to any one of claims 4-6. Furthermore, comprising a third light source that irradiates the second space with illumination light,
The ultraviolet light irradiation system according to any one of claims 4-6. The control device causes the first light source to irradiate the ultraviolet light for a preset period, and then stops the irradiation of the ultraviolet light.
The ultraviolet light irradiation system according to any one of claims 1-8. Furthermore, a notification device is provided to notify the surroundings of the operating state of the first light source,
The ultraviolet light irradiation system according to any one of claims 1-9. Furthermore, a transmission device for transmitting operation information indicating the operation state of the first light source to a preset destination,
The ultraviolet light irradiation system according to any one of claims 1-10.

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