JP2018190604A - UVLED irradiation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an UVLED irradiation system capable of irradiating an object on which photocatalyst processing has been performed, with a suitable quantity of ultraviolet lights in accordance with a contamination state of the object.SOLUTION: A UVLED irradiation system 1 comprises: a human detection sensor 50 or 55 which outputs an absence signal in a case where the absence of a human body in a detection area including an object 2 is detected; an odor sensor 60 which outputs a contamination level signal indicating an odor level Lo in a space including the object 2; a UVLED 30 capable of irradiating the object 2 with ultraviolet lights; a UVLED turning-on device 40 capable of turning on the UVLED 30 in a variable output state; a UVLED turning-on/turning-off control part 71 which causes the UVLED turning-on device 40 to turn on the UVLED 30 in a case where the absence signal is being outputted; and a UV intensity determination part 72 which determines the output state of the UVLED turning-on device 40 in such a manner that an irradiation intensity of ultraviolet lights is increased with respect to increase of the odor level Lo indicated by the contamination level signal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a UVLED irradiation system.

  When ultraviolet light (UV) is irradiated to objects such as toilets and washbasins that have been subjected to photocatalyst processing, the contaminants are decomposed on the surface, and antifouling, deodorizing, antibacterial, purification, and other effects can be obtained. It has been known. However, since UV causes harm (collagen fiber destruction) to the human body, it is not desirable to irradiate the object with UV at all times, for example, during use of a toilet. Therefore, it is preferable to perform UV irradiation only when the absence of the user is confirmed using a human sensor or the like (see, for example, Patent Documents 1 to 3).

JP 2001-65035 A JP 2017-29293 A JP 2006-274573 A

  However, as described above, according to the configuration in which the presence of the human body is detected by the human sensor and the UV irradiation is performed, there is a case where there is almost no chance of UV irradiation in a toilet facility or the like where the user frequently enters and exits. In such a situation, the UV irradiation becomes too small with respect to the contaminated state of the object, and the photocatalytic effect is hardly obtained. On the other hand, if the UV irradiation intensity is increased in order to obtain a larger photocatalytic effect with less chance of UV irradiation, the UV irradiation may become excessive with respect to the contamination level of the object, which is not preferable from the viewpoint of energy saving.

  Then, this invention makes it a subject to provide the UVLED irradiation system which can irradiate a suitable quantity of an ultraviolet-ray according to the contamination state of the target object photocatalyzed.

  The UVLED irradiation system according to the first aspect of the present invention includes a human sensor that outputs an absence signal when the absence of a human body in a detection area including an object is detected, and a contamination level that indicates an odor level of a space including the object. An odor sensor that outputs a signal, a UVLED that can irradiate an object with ultraviolet light, a UVLED lighting device that can light the UVLED in a variable output state, and a UVLED that lights the UVLED lighting device when an absence signal is output And a UV intensity determination unit that determines the output state of the UVLED lighting device so that the irradiation intensity of ultraviolet rays increases with an increase in the odor level indicated by the contamination level signal.

  According to the said structure, a UV intensity determination part determines the output state of a UVLED lighting device so that the irradiation intensity of the ultraviolet-ray from UVLED may increase according to the increase in an odor level. The object is a toilet or the like. Thereby, the UVLED irradiation system which can irradiate a suitable amount of ultraviolet rays according to the contamination state of objects, such as a toilet bowl processed into a photocatalyst, is implement | achieved.

  Furthermore, an illumination LED capable of irradiating a space including the object and an LED lighting device that turns on the illumination LED are provided, and the absence of the human sensor when the human sensor detects the absence of the human body in the room including the object It is configured to output a signal, and the on / off control unit preferably causes the LED lighting device to turn off the illumination LED while the UVLED is on. This reliably prevents the user from entering the space during the ultraviolet irradiation.

  The UVLED irradiation system according to the second aspect further includes a time measuring unit that measures a time interval from the output of the n-th absence signal to the output of the n + 1-th absence signal in the first form, and the UV intensity determination unit includes The output state is determined so that the irradiation intensity of the (n + 1) th ultraviolet ray increases as the time interval increases. Thereby, even when the odor component is difficult to reach from the wall-mounted toilet to the odor sensor due to ventilation in the space, ultraviolet irradiation by the UVLED is appropriately performed. Therefore, the effect in the first embodiment is obtained, and contamination is more reliably suppressed.

  In the UVLED irradiation system of the third mode, in the first mode, the object is a wall-mounted toilet, and the human sensor outputs an absence signal when the absence of a human body directly facing the wall-mounted toilet is detected. Composed. As a result, since turning on / off of the UVLEDs is individually controlled for each wall-mounted toilet, even when it is difficult for the entire space to become a vacant space, UV irradiation to each wall-mounted toilet can be performed frequently. Therefore, the effect in the first embodiment is obtained, and the contamination level of each wall toilet is more reliably suppressed.

  The UVLED irradiation system of the fourth form is a wide area human sensor that outputs a first absence signal when the absence of a human body including a wall toilet is detected, and the absence of a human body directly facing the wall toilet A narrow-area human sensor that outputs a second absence signal, an odor sensor that outputs a contamination level signal indicating an indoor odor level, a UVLED that can irradiate a wall-mounted toilet with ultraviolet light, and a UVLED in a variable output state. A UVLED lighting device that can be turned on, a UV intensity determination unit that determines an output state so that an irradiation intensity of ultraviolet rays increases with respect to an increase in odor level indicated by a contamination level signal, and a first absence signal are output. In this case, the UVLED lighting device is controlled to obtain the output state determined by the UV intensity determination unit, and the first absence signal is not output and the second absence signal is output. Expediently, an output adjustment section that controls the UVLED lighting device so as to obtain an output state of a predetermined low level.

  According to the above configuration, when there is no user in the entire room, ultraviolet irradiation is performed with an intensity corresponding to the odor level, and when there is a user in the room, the level is low only for wall toilets that are not in use. Ultraviolet irradiation is performed with intensity. Therefore, the effect in the first embodiment can be obtained, and it is possible to suppress the influence of the reflected ultraviolet rays on the user existing in the room while ensuring the ultraviolet ray irradiation amount by increasing the frequency of ultraviolet ray irradiation to each wall toilet. Become.

  In the UVLED irradiation systems of the first to fourth embodiments, the odor sensor is a sensor that detects an ammonia component, and the odor sensor is preferably arranged at a position higher than the toilet bowl or the wall toilet. Thereby, ammonia lighter than air is reliably detected.

  In the UVLED irradiation systems according to the first to fourth embodiments, the UV intensity determination unit may be configured to maintain the irradiation intensity of ultraviolet rays at a predetermined standby irradiation intensity when the odor level is zero. Thereby, the increase in the contamination from the trace amount pollutant in a target object is prevented reliably.

  In the UVLED irradiation systems according to the first to fourth embodiments, the UV intensity determination unit may be configured to stop the output of the UVLED lighting device when the odor level is zero. Thereby, the energy-saving property in a UVLED irradiation system improves.

It is a block diagram of UVLED irradiation system by a 1st embodiment. It is a general-view figure of UVLED irradiation system by a 1st embodiment. It is a figure explaining the UVLED lighting device in a 1st embodiment. It is a figure explaining the UVLED lighting device in a 1st embodiment. It is a figure explaining operation | movement of the UVLED irradiation system by 1st Embodiment. It is a block diagram which shows the one aspect | mode of the UVLED irradiation system by 1st Embodiment. It is a block diagram of UVLED irradiation system by a 2nd embodiment. It is a block diagram of UVLED irradiation system by a 3rd embodiment. It is a block diagram which shows the one aspect | mode of the UVLED irradiation system by 3rd Embodiment. It is a block diagram of UVLED irradiation system by a 4th embodiment. It is a figure explaining the UVLED lighting device in 4th Embodiment. It is a figure explaining the UVLED lighting device in 4th Embodiment.

<First Embodiment>
FIG. 1 shows a block diagram of a UVLED irradiation system 1 according to the first embodiment of the present invention, and FIG. 2 shows an overview of the UVLED irradiation system 1. As shown in FIG. 2, the UVLED irradiation system 1 is installed in a toilet, for example, illuminates a space S including a wall-mounted toilet 2 (target object) and sterilizes the wall-mounted toilet 2 that has been photocatalyzed by ultraviolet (UV) sterilization. To do.

  The UVLED irradiation system 1 includes an illumination LED 10, an LED lighting device 20, a UVLED 30, a UVLED lighting device 40, a human sensor 50, an odor sensor 60, and a control unit 70 (the reference numeral 55 in FIG. To explain). The LED lighting device 20, the UVLED lighting device 40, and the control unit 70 are supplied with power from an AC power source AC. For the sake of clarity, the wiring from the AC power supply AC to each component and the wiring between the components are shown as single lines, but these are actually wired as two lines.

  The LED 10 for illumination is installed in the ceiling C of the space S, and gives illumination to the space (that is, the room) including the wall-mounted toilet 2. The LED lighting device 20 converts an alternating voltage from the alternating current power source AC into a direct current, and supplies the direct current to the lighting LED 10. The operation state of the LED lighting device 20 is determined by the control unit 70.

  The UVLED 30 is installed on the ceiling C of the space S and irradiates the wall-mounted toilet 2 included in the irradiation range R with UV. Photocatalytic processing (coating) is applied to the surface of the wall-mounted toilet 2. That is, when UV light is irradiated from the UVLED 30 to the wall-mounted toilet 2, the dirt component on the surface of the wall-mounted toilet 2 is decomposed by the photocatalytic action, whereby the wall-mounted toilet 2 is cleaned. The UVLED lighting device 40 converts an alternating voltage from the alternating current power supply AC into a direct current, and supplies this direct current to the UVLED 30. The operation state of the UVLED lighting device 40 is determined by the control unit 70.

  The human sensor 50 is installed on the ceiling C of the space S and detects the presence / absence of the human body in the room (that is, the entire toilet). The human sensor 50 is a pyroelectric infrared sensor that detects the presence / absence of a human body by detecting a short-term change in heat in a detection area. The human body 50 applies an image recognition technique to an image captured by an image sensor. An image sensor for detecting the presence / absence of the presence or absence of the presence / absence of the human body by detecting the movement of the human body from the reflected wave of the emitted microwave. The human sensor 50 generates a human detection signal that reverses depending on the presence / absence of the human body in the space S, and outputs the human detection signal to the control unit 70. For convenience of explanation, it is assumed that the human detection signal includes a presence signal / absence signal corresponding to the presence / absence of the human body. That is, one of the presence signal and the absence signal is represented by “0”, and the other is represented by “1”.

  The odor sensor 60 is installed on the ceiling C of the space S and detects the odor level Lo of the wall-mounted toilet 2. The odor sensor 60 is a sensor that detects an ammonia component in the atmosphere, and specifies the odor level Lo based on the detected amount of the ammonia component. Here, the odor sensor 60 is preferably installed at a position higher than the wall-mounted toilet 2 (preferably at the highest position) such as the ceiling C. Thereby, the ammonia component lighter than air is reliably detected by the odor sensor 60. The odor sensor 60 generates a contamination level signal (for example, an analog signal) indicating the odor level Lo, and outputs the contamination level signal to the control unit 70.

  The control unit 70 includes a lighting on / off control unit 71 and a UV intensity determination unit 72, and is configured by a microcomputer or the like. The control unit 70 determines the output states of the LED lighting device 20 and the UVLED lighting device 40 according to the human detection signal or the contamination level signal.

  When a presence signal is input from the human sensor 50, the lighting / light-out controller 71 causes the LED lighting device 20 to turn on the illumination LED 10 and causes the UVLED lighting device 40 to turn off the UV LED 30. On the other hand, when the absence signal is input from the human sensor 50, the lighting / lighting-out control unit 71 causes the LED lighting device 20 to turn off the lighting LED 10 immediately after the input or after a predetermined time has elapsed, and causes the UVLED lighting device 40 to turn on the UVLED 30. Lights up. The predetermined time may be several seconds, and if the absence signal is output due to the user's being stopped by securing this predetermined time (perhaps in response to the lighting LED 10 being turned off) When the user moves, the presence signal is output again), and the user can be prevented from being irradiated with UV.

  The UV intensity determination unit 72 controls the output of the UVLED lighting device 40 according to the odor level Lo of the contamination level signal from the odor sensor 60. That is, the output state of the UVLED lighting device 40 is determined so that the UV irradiation intensity from the UVLED 30 increases / decreases in accordance with the increase / decrease in the odor level Lo.

  3A and 3B are diagrams illustrating the configuration of output control of the UVLED lighting device 40. FIG. The UVLED lighting device 40 may be composed of a rectifier circuit and a DC / DC converter. As an example of the DC / DC converter, FIG. 3A shows a flyback converter. For example, the UVLED lighting device 40 includes a rectifier circuit 41, an input capacitor 42, a transformer 43, a switching element (FET) 44, a diode 45, an output capacitor 46, and a driver 47. The FET 44 is PWM driven by a driver 47. The lighting on / off control unit 71 stops the operation of the driver 47 in accordance with the presence signal and keeps the FET 44 off. On the other hand, the lighting on / off control unit 71 validates the operation of the driver 47 according to the absence signal. Then, the UV intensity determination unit 72 increases / decreases the on-time (or on-duty) in the PWM drive of the FET 44 according to the increase / decrease of the odor level Lo, and increases / decreases the UV irradiation intensity by the UVLED 30.

  Further, as shown in FIG. 3B, a switching element (FET) 49 may be inserted and connected to the output path of the DC / DC converter 48. The DC / DC converter 48 may employ any form of converter such as a flyback converter, a power factor correction circuit and a step-down chopper circuit (buck converter). The lighting on / off control unit 71 keeps the FET 49 off according to the presence signal and releases the off state of the FET 49 according to the absence signal. Then, the UV intensity determining unit 72 increases / decreases the UV irradiation intensity from the UVLED 30 by increasing / decreasing the on-duty in the PWM drive of the FET 49 according to the increase in the odor level Lo. The switching frequency in the PWM drive of the FET 49 may be about 0.1 Hz to 100 kHz. Since the lighting of the UVLED 30 is premised on the absence of the user and the ultraviolet irradiation itself is not visible light, flickering due to lighting may appear. Therefore, the lower limit of the switching frequency is determined according to the performance of the UV intensity determination unit 72 and the FET 49. The upper limit of the switching frequency is determined according to the performance of the UV intensity determining unit 72 and the FET 49, switching noise requirements, and the like.

  An example of the operation of the UVLED irradiation system 1 will be described with reference to FIG. In FIG. 4, the vertical axis indicates the human detection signal, the odor level Lo, and the UV irradiation intensity from the bottom, and the horizontal axis indicates time. Note that the drawings are not necessarily drawn to scale for convenience of explanation.

  It is assumed that a user is present in the space S (indoor) at time t0 to t1. Therefore, the on / off controller 71 to which the presence signal is input causes the UVLED lighting device 40 to turn off the UVLED 30. Therefore, the UV irradiation intensity is zero and the odor level Lo increases.

  It is assumed that there is no user in the space S at times t1 to t3. The UV intensity determination unit 72 controls the UVLED lighting device 40 so that the UV irradiation intensity corresponds to the odor level Lo at the time t1, and then the UVLED so that the UV irradiation intensity decreases according to the decrease in the odor level Lo. The lighting device 40 is controlled. Note that the UV irradiation intensity corresponding to zero odor level may not be zero.

  Here, as shown by the line A (solid line), even when the odor level Lo becomes zero, a small amount of UV irradiation intensity (standby irradiation intensity) is used to prevent contamination while the absence signal is output. It may be maintained. For example, although the odor level Lo becomes zero at time t2, the UV intensity determination unit 72 controls the UVLED lighting device 40 so as to maintain the standby irradiation intensity at times t2 to t3. Thereby, the increase in the contamination from the trace amount pollutant in the wall-mounted toilet 2 is reliably prevented. The standby irradiation intensity may be about 1 to 10% of the maximum value of the UV irradiation intensity. On the other hand, as indicated by line B (dotted line), when the odor level Lo becomes zero, the UV irradiation intensity may be zero (that is, the output of the UVLED lighting device 40 may be stopped). Thereby, the energy-saving property in UVLED irradiation system 1 improves.

It is assumed that a user exists in the space S at times t3 to t4. Accordingly, the UV irradiation intensity becomes zero and the odor level Lo increases.
It is assumed that the user is absent from the space S at times t4 to t5. The UV intensity determination unit 72 controls the UVLED lighting device 40 so that the UV irradiation intensity corresponds to the odor level Lo at time t4, and then the UVLED so that the UV irradiation intensity decreases according to the decrease in the odor level Lo. The lighting device 40 is controlled.
It is assumed that a user exists in the space S at times t5 to t6. Accordingly, the UV irradiation intensity becomes zero and the odor level Lo increases.
The operation at times t6 to t9 is substantially the same as the operation at times t1 to t4.

  As described above, the UVLED irradiation system 1 of the present embodiment includes each one LED for illumination 10, LED lighting device 20, UVLED 30, UVLED lighting device 40, human sensor 50, odor sensor 60, and control unit 70 as one unit. To establish. On the other hand, when the UVLED irradiation system 1 includes a plurality of illumination LEDs 10 and a plurality of UVLEDs 30, the number of human sensors 50 and odor sensors 60 may be less than the number of illumination LEDs 10 or the number of UVLEDs 30. Good (one set up each).

  For example, as illustrated in FIG. 5, the UVLED irradiation system 1 includes one human sensor 50, one odor sensor 60, one control unit 70, and n units U-1 to U- in the space S. n may be provided. In this case, each of the units U-1 to Un includes the illumination LED 10, the LED lighting device 20, the UVLED 30, and the UVLED lighting device 40. In the following description, the units U-1 to Un are collectively referred to as “unit U” or one of them is representative.

  In this configuration, when a presence signal is output from the human sensor 50, the lighting / extinguishing control unit 71 (not shown) of the control unit 70 causes the LED lighting device 20 of each unit U to turn on the illumination LED 10 and turns on the UV LED. The apparatus 40 turns off the UVLED 30. On the other hand, when an absence signal is input from the human sensor 50, the lighting / extinguishing control unit 71 of the control unit 70 causes the LED lighting devices 20 of each unit U to turn off the illumination LEDs 10, and causes the UVLED lighting device 40 to turn on the UVLED 30. Lights up. Then, a UV intensity determination unit 72 (not shown) of the control unit 70 controls the output of the UVLED lighting device 40 of each unit U according to the odor level Lo of the contamination level signal from the odor sensor 60. In this case, the UV irradiation intensity by the UVLED 30 of all the units U is the same.

  In addition, various variations are possible for the configuration of the UVLED irradiation system 1. For example, the number of LED 10 for illumination and the number of UVLED 30 may be different. Further, the number of installed human sensors 50 and the number of installed odor sensors 60 may be different. When a plurality of human sensors 50 are installed in the same room, a logical sum (OR) of a plurality of absent signals is adopted. In addition, when a plurality of odor sensors 60 are installed in the same room, an average value, a median value, or a maximum value of odor levels indicated by a plurality of contamination level signals is adopted. Moreover, the irradiation area of one UVLED 30 may correspond to one wall toilet 2 (see FIG. 2) or may include a plurality of wall toilets 2.

  As described above, the UVLED irradiation system 1 according to the present embodiment has the human sensor 50 that outputs the absence signal when the absence of the human body in the detection area including the wall toilet 2 is detected, and the odor of the space including the wall toilet 2. The odor sensor 60 that outputs a contamination level signal indicating the level Lo, the UVLED 30 that can irradiate the wall toilet 2 with ultraviolet light, the UVLED lighting device 40 that can light the UVLED 30 in a variable output state, and the absence signal are output. In this case, a lighting / extinguishing control unit 71 that causes the UVLED lighting device 40 to turn on the UVLED 30 and a UV intensity determination unit 72 that determines the output state of the UVLED lighting device 40 so that the irradiation intensity of ultraviolet rays increases with an increase in the odor level Lo. With.

  As described above, the UV intensity determination unit 72 determines the output state of the UVLED lighting device 40 so that the irradiation intensity of the ultraviolet rays from the UVLED 30 increases as the odor level Lo increases. Thereby, the UVLED irradiation system 1 which can irradiate a suitable amount of ultraviolet rays according to the contamination state of the object such as the wall toilet 2 which has been photocatalyzed is realized.

<Second Embodiment>
In the first embodiment, the configuration in which the UV irradiation intensity is based solely on the odor level of the contamination level signal is shown. However, in the present embodiment, the configuration in which the UV irradiation intensity is based not only on the odor level but also on the UV irradiation interval is shown. . In the present embodiment, for example, when the space S is ventilated, the contamination level of the object (wall toilet 2) may not be decreased even if the odor reaching the odor sensor 60 is decreased. Is.

  FIG. 6 shows a block diagram of the UVLED irradiation system 1 of the present embodiment. The present embodiment is different from the first embodiment in that the control unit 70 includes a time measuring unit 73. In the present embodiment, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.

  The timer 73 measures a time interval T from the output of the nth absence signal to the output of the (n + 1) th absence signal (that is, the duration of the nth presence signal). The UV intensity determination unit 72 controls the UVLED lighting device 40 so that the (n + 1) th UV irradiation intensity increases as the time interval T increases.

  The UV intensity determination unit 72 may control the UVLED lighting device 40 to perform UV irradiation with a predetermined intensity regardless of the odor level Lo when the time interval T exceeds a predetermined value. This predetermined intensity is higher than the UV irradiation intensity corresponding to the odor level Lo at that time. For example, the UV intensity determination unit 72 calculates the first UV irradiation intensity with respect to the odor level Lo, and calculates the coefficient α (1 <α) corresponding to the time interval T when the time interval T exceeds a predetermined value. The second UV irradiation intensity can be calculated by multiplying the UV irradiation intensity by 1, and the output state corresponding to the second UV irradiation intensity can be determined. Alternatively, the UV intensity determination unit 72 calculates the first UV irradiation intensity with respect to the odor level Lo, calculates the second UV irradiation intensity with respect to the time interval T, and calculates the first UV irradiation intensity and the second UV irradiation intensity. The higher one of the UV irradiation intensities may be selected to determine the output state corresponding to the selected UV irradiation intensity. In this case, the second UV irradiation intensity can be set to decrease with increasing UV irradiation time (ie, the duration of the absence signal).

  As described above, the UVLED irradiation system 1 according to the present embodiment further includes the time measuring unit 73 that measures the time interval T from the output of the n-th absence signal to the output of the n + 1-th absence signal, and the UV intensity determination unit 72. However, the output state is determined so that the (n + 1) th UV irradiation intensity increases as the time interval T increases. Thereby, even when the odor component is difficult to reach from the wall-mounted toilet 2 to the odor sensor 60 on the ceiling C by ventilation such as opening the window of the space S, UV irradiation by the UVLED 30 is appropriately performed. Therefore, in addition to obtaining the effect of the first embodiment, contamination is more reliably suppressed.

<Third Embodiment>
In the first embodiment, the configuration in which the UVLED 30 is turned on according to the presence / absence of the user in the space S is shown. However, in the present embodiment, the presence / absence of the user facing the wall-mounted toilet 2 is determined. The structure which lights up UVLED30 is shown.

  FIG. 7 shows a block diagram of the UVLED irradiation system 1 of the present embodiment. An overview of the UVLED irradiation system 1 is the same as FIG. With respect to FIG. 7, this embodiment differs from the first embodiment (see FIG. 1) in that there is no wiring between the control unit 70 (light on / off control unit 71) and the LED lighting device 20. 2, this embodiment differs from the first embodiment in that a human sensor 55 of the wall-mounted toilet 2 is used instead of the human sensor 50 installed on the ceiling C. In the present embodiment, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.

  The human sensor 55 is a narrow human sensor installed with the side facing the wall W (or the front surface of the wall-mounted toilet 2), and is attached to the lid of the wall-mounted toilet 2, for example. The human sensor 55 detects a human body facing the wall-mounted toilet 2 and outputs an absence signal when the absence of the human body is detected. The human sensor 55 may be a pyroelectric infrared sensor or the like used in a general automatic cleaning system for a wall-mounted toilet 2, and a human detection signal from the human sensor 55 is a toilet cleaning system (not shown). And it shall be wired so that it may be output to the lighting-on / off control part 71 of the control part 70. FIG.

  When the presence signal is input from the human sensor 55, the on / off control unit 71 causes the UVLED lighting device 40 to turn off the UVLED 30. On the other hand, when an absence signal is input from the human sensor 55, the lighting / light-out controller 71 causes the UVLED lighting device 40 to light the UVLED 30 immediately after the input or after a predetermined time has elapsed. By securing this predetermined time, when the user leaves the wall-mounted toilet 2 but still exists in the vicinity thereof, the reflected UV from the wall-mounted toilet 2 or the floor or wall surface in the vicinity thereof does not hit the user. Can be. The LED lighting device 20 turns on / off the illumination LED 10 based on a user operation by a wall switch (not shown) or a control by a human sensor of another system (not shown).

  As described above, the UVLED irradiation system 1 of the present embodiment includes one LED for illumination 10, the LED lighting device 20, the UVLED 30, the UVLED lighting device 40, the human sensor 55, the odor sensor 60, and the control unit 70 as one unit. It can be established. On the other hand, when the UVLED irradiation system 1 includes a plurality of UVLEDs 30, the number of the odor sensors 60 may be smaller than the number of the UVLEDs 30 (one may be installed).

  For example, as shown in FIG. 8, the UVLED irradiation system 1 includes one odor sensor 60, one UV intensity determination unit 72, and n units U- 1 to Un for the space S. May be. In this case, each unit U includes the UVLED 30, the UVLED lighting device 40, the human sensor 55, and the lighting on / off control unit 71, and corresponds to each wall toilet 2. The plurality of lighting on / off control units 71 and one UV intensity determination unit 72 constituting the control unit 70 can be dispersedly arranged. The illumination LED 10 and the LED lighting device 20 are independent of other components, and the installation position and the number of installation are arbitrary.

  In this configuration, in each unit U, when the presence signal is input from the human sensor 55, the lighting / extinguishing control unit 71 causes the UVLED lighting device 40 to turn off the UVLED 30 and the absence signal is input from the human sensor 55. In the case of (or immediately after the input or after a predetermined time has elapsed), the UVLED lighting device 40 is caused to light the UVLED 30. Then, the UV intensity determination unit 72 determines the output state of the UVLED lighting device 40 of each unit U according to the odor level Lo of the contamination level signal from the odor sensor 60. In this case, the UV irradiation intensity by the UVLED 30 of the unit U during all UV irradiation is the same.

  As described above, in the UVLED irradiation system 1 according to the present embodiment, the human sensor 55 is configured to detect a human body facing the wall-mounted toilet 2. Thus, since the UVLED 30 is individually turned on / off for each wall-mounted toilet 2, each wall-mounted toilet 2 can be used even in a situation where the space S as a whole is unlikely to be vacant (a toilet in a terminal station, a toilet in a service area, etc.). UV irradiation can be performed frequently. Therefore, in addition to obtaining the effect of the first embodiment, the contamination level of each wall-mounted toilet 2 is more reliably suppressed.

<Fourth Embodiment>
In the first embodiment, the configuration using the wide-area human sensor 50 is shown, and in the third embodiment, the configuration using the narrow human sensor 55 is shown. However, in this embodiment, the wide-area human sensor is used. The structure which controls UV irradiation using both the sensor 50 and the human sensitive sensor 55 of a narrow area is shown. As a general rule, the UVLED irradiation system 1 according to the present embodiment performs UV irradiation at an intensity corresponding to the odor level Lo in the same manner as in the first embodiment when the user is absent throughout the room, If present, only the wall-mounted toilet 2 that is not in use is irradiated with UV at a low level.

  FIG. 9 shows a block diagram of the UVLED irradiation system 1 of the present embodiment. In the present embodiment, components that are substantially the same as those of the first or third embodiment are denoted by the same reference numerals, and redundant description thereof is omitted. For clarity of explanation, the human sensor 50 and the human sensor 55 are referred to as a wide area human sensor 50 and a narrow area human sensor 55, respectively.

  The UVLED irradiation system 1 includes, for the space S, one wide area sensor 50, one odor sensor 60, one UV intensity determination unit 72, and n units U-1 to Un. Each unit U includes a UVLED 30, a UVLED lighting device 40, a narrow area human sensor 55, and an output adjustment unit 74, and corresponds to each wall-mounted toilet 2. The illumination LED 10 and the LED lighting device 20 may be independent of other components, or are connected to the wide area human sensor 50 via the lighting / extinguishing control unit 71 as indicated by a broken line. Turning on / off may be controlled according to the detection result. Moreover, the installation position and the number of installation of the LED 10 for illumination and the LED lighting device 20 are arbitrary. The lighting on / off control unit 71 (when connected), the UV intensity determination unit 72, and the output adjustment unit 74 constituting the control unit 70 can be distributed.

  In each unit U, the output adjustment unit 74 receives the human detection signal from the wide area human sensor 50, the human detection signal from the narrow human sensor 55, and the contamination level signal from the UV intensity determination unit 72. The output of the UVLED lighting device 40 is controlled. The UV intensity determination unit 72 determines the UV irradiation intensity of each unit U according to the odor level Lo of the contamination level signal from the odor sensor 60, and outputs a signal indicating the UV irradiation intensity to the output adjustment unit 74. In this case, the UV irradiation intensity determined for all the units U is the same. Note that the UVLED irradiation system 1 is established even when n = 1.

When the absence signal is output from the wide area human sensor 50 (in this case, the absence signal is also output from the narrow area human sensor 55), the output adjustment units 74 of all the units U are transmitted by the UV intensity determination unit 72. The UVLED lighting device 40 is controlled so that the determined output state is obtained.
When the presence signal is output from the wide area human sensor 50 and the absence signal is output from the narrow area human sensor 55, the output adjustment unit 74 of the unit U outputting the absence signal The UVLED lighting device 40 is controlled so as to obtain a low level output state.
When the presence signal is output from the narrow area human sensor 55 (in this case, the presence signal is also output from the wide area human sensor 50), the output adjusting unit 74 of the unit U that outputs the presence signal. Stops the output of the UVLED lighting device 40.

  That is, when the absence signal is output from the wide area human sensor 50, the UV irradiation is performed with the UV irradiation intensity corresponding to the odor level Lo as in the first embodiment. On the other hand, when a presence signal is output from any of the narrow area motion sensors 55 and a presence signal is output from the wide area motion sensor 50, there are some wall-mounted toilets 2 that are not used. It means that the user is somewhere in the room. In this case, similarly to the third embodiment, the UV irradiation is performed only on the wall toilet 2 that is absent (that is, not used).

  Here, the low-level output state (low-level UV irradiation intensity) so that the reflected UV from the wall-mounted toilet 2 or the floor or wall surface in the vicinity of the UV irradiation does not hit the user in the space S. Is preferably lower than the output state (normal UV irradiation intensity) when the space S becomes an empty room. For example, the low-level output state may correspond to a predetermined fixed UV irradiation intensity, or a predetermined coefficient α (0 <α <1) is applied to the irradiation intensity according to the odor level Lo. It may correspond to the applied UV irradiation intensity. When the low level output state is fixed, the UV irradiation intensity corresponding to this output state may be 50% or less of the maximum value of the UV irradiation intensity, preferably 25% or less, more preferably 10% or less. I just need it.

  10A and 10B are diagrams for explaining the configuration of output control of the UVLED lighting device 40, and correspond to FIGS. 3A and 3B of the first embodiment, respectively. The FET 44 is PWM driven by a driver 47. When the absence signal is input from the wide area human sensor 50, the output adjustment unit 74 determines the on-time (or on-duty) in the PWM drive of the FET 44 so as to obtain the UV irradiation intensity determined by the UV intensity determination unit 72. To do. When the presence signal is input from the wide area human sensor 50 and the absence signal is input from the narrow area human sensor 55, the output adjustment unit 74 performs PWM driving of the FET 44 so that the low-level output state is obtained. The on-time (or on-duty) at is determined. When the presence signal is input from the narrow area human sensor 55, the output adjustment unit 74 stops the PWM drive of the FET 44.

  10B, when the absence signal is input from the wide area human sensor 50, the output adjustment unit 74 in the PWM drive of the FET 49 so as to obtain the UV irradiation intensity determined by the UV intensity determination unit 72. Determine the on-duty. When the presence signal is input from the wide area human sensor 50 and the absence signal is input from the narrow area human sensor 55, the output adjustment unit 74 performs PWM driving of the FET 49 so that the low-level output state is obtained. Determine the on-duty at. When the presence signal is input from the narrow area human sensor 55, the output adjustment unit 74 keeps the FET 49 off. In this example, similarly to the first embodiment, the switching frequency in the PWM drive of the FET 49 may be about 0.1 Hz to 100 kHz.

  As described above, the UVLED irradiation system 1 according to the present embodiment corrects the wide-area human sensor 50 that outputs the first absence signal when the absence of a human body including the wall toilet 2 is detected, and the wall toilet 2. When the absence of a human body is detected, a narrow human sensor 55 that outputs a second absence signal, an odor sensor 60 that outputs a contamination level signal indicating an indoor odor level Lo, and the wall-mounted toilet 2 are irradiated with ultraviolet rays. A possible UVLED 30, a UVLED lighting device 40 capable of lighting the UVLED 30 in a variable output state, a UV intensity determining unit 72 for determining an output state so that an irradiation intensity of ultraviolet rays increases with an increase in odor level Lo, When the first absence signal is output, the UVLED lighting device 40 is controlled so as to obtain the output state determined by the UV intensity determination unit 72, and the first absence signal If the output is not and the second absence signal is output, and an output adjustment unit 74 for controlling the UVLED lighting device 40 so as to obtain an output state of a predetermined low level.

  Thereby, when there is no user in the whole room, UV irradiation is performed with the UV irradiation intensity corresponding to the odor level Lo, and when there is a user in the room, only the wall toilet 2 that is not in use is used. UV irradiation is performed at a low level of UV irradiation intensity. Therefore, the effect in the first embodiment can be obtained, and the influence of the reflected UV on the user existing in the room can be suppressed while increasing the frequency of UV irradiation to secure the UV irradiation amount for each wall-mounted toilet 2. Is possible.

<Modification>
Although preferred embodiments of the present invention have been described above, the present invention can be modified into various modes as shown below, for example.

(1) Deformation related to the object In the first to fourth embodiments, the UV irradiation object is the wall-mounted toilet 2, but the object is not limited to this and may be, for example, another type of toilet. . In addition, the present invention can be applied to any object that can be subjected to photocatalytic processing (photocatalyst coating, application of a photocatalyst film, etc.) and emits an odor such as ammonia.

(2) Modification of Odor Sensor 60 In the first to fourth embodiments, the configuration in which the odor sensor 60 is a sensor that detects ammonia has been described. However, the odor sensor 60 may be methanethiol, hydrogen sulfide, amines, or the like. The sensor which detects the other odor component may be sufficient. The odor sensor 60 may be a sensor that can detect two or more of the odor components.

1 UVLED irradiation system 2 Wall-mounted toilet (object)
10 LED for lighting
20 LED lighting device 30 UVLED
40 UVLED lighting device 50 Human sensor (Wide area human sensor)
55 Human sensor (Narrow area human sensor)
60 Odor Sensor 70 Control Unit 71 Light On / Off Control Unit 72 UV Intensity Determination Unit 73 Timekeeping Unit 74 Output Adjustment Unit

Claims (9)

A UVLED irradiation system,
A human sensor that outputs an absence signal when detecting the absence of a human body in a detection area including an object;
An odor sensor that outputs a contamination level signal indicating the odor level of the space containing the object;
A UVLED capable of irradiating the object with ultraviolet rays;
A UVLED lighting device capable of lighting the UVLED in a variable output state;
A light on / off control unit that causes the UV LED lighting device to light the UV LED when the absence signal is output;
A UVLED irradiation system comprising: a UV intensity determination unit that determines the output state so that the irradiation intensity of the ultraviolet rays increases with an increase in the odor level indicated by the contamination level signal.   The UVLED irradiation system according to claim 1, wherein the object is a toilet, and the odor sensor is a sensor that detects an ammonia component, and is disposed at a position higher than the toilet. An illumination LED capable of irradiating a space including the object;
An LED lighting device for lighting the LED for illumination,
The human sensor is configured to output an absence signal when detecting the absence of a human body in a room including the object,
The UVLED irradiation system according to claim 1, wherein the lighting on / off control unit is configured to cause the LED lighting device to turn off the illumination LED while the UVLED is turned on. a timer for measuring a time interval from the output of the n-th absence signal to the output of the n + 1-th absence signal;
4. The apparatus according to claim 1, wherein the UV intensity determination unit is configured to determine the output state such that an irradiation intensity of the ultraviolet ray of the (n + 1) th time increases in accordance with an increase in the time interval. Item 4. UVLED irradiation system. The object is a wall-mounted toilet;
The UVLED irradiation system according to claim 1, wherein the presence sensor is configured to output an absence signal when detecting the absence of a human body directly facing the wall-mounted toilet. A UVLED irradiation system,
A wide area human sensor that outputs a first absence signal when the absence of a human body including a wall-mounted toilet is detected;
A narrow-area human sensor that outputs a second absence signal when the absence of a human body facing the wall toilet is detected;
An odor sensor that outputs a pollution level signal indicating the odor level in the room;
A UVLED capable of irradiating the wall toilet with ultraviolet rays;
A UVLED lighting device capable of lighting the UVLED in a variable output state;
A UV intensity determination unit that determines the output state so that the irradiation intensity of the ultraviolet ray increases with respect to the increase in the odor level indicated by the contamination level signal;
When the first absence signal is output, the UVLED lighting device is controlled to obtain the output state determined by the UV intensity determination unit, and the first absence signal is not output and the An UVLED irradiation system comprising: an output adjustment unit that controls the UVLED lighting device so as to obtain a predetermined low-level output state when the second absence signal is output.   The UVLED irradiation system according to claim 5 or 6, wherein the odor sensor is a sensor that detects an ammonia component and is disposed at a position higher than the wall toilet.   The UVLED according to any one of claims 1 to 7, wherein the UV intensity determination unit is configured to maintain the irradiation intensity of the ultraviolet ray at a predetermined standby irradiation intensity when the odor level is zero. Irradiation system. The UVLED irradiation system according to any one of claims 1 to 7, wherein the UV intensity determination unit is configured to stop the output of the UVLED lighting device when the odor level is zero.

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