JP2020117931A - Sanitary washing device - Google Patents

Abstract

To sterilize water running in a water flow path from a water supply source to a nozzle more reliably by irradiation with ultraviolet rays, and suppressing unnecessary ultraviolet ray irradiation to extend the life of the ultraviolet ray irradiation device.SOLUTION: A sanitary washing device is provided in a water flow path from a water supply source to a nozzle, and includes an ultraviolet ray irradiation device that irradiates the water in the water flow path with ultraviolet ray, and a control device that controls the ultraviolet ray irradiation device. The control device acquires environment-related information related to the surrounding environment, sets irradiation conditions of the ultraviolet rays based on the acquired environment-related information, and controls the ultraviolet ray irradiation device so that the ultraviolet rays are irradiated according to the set irradiation conditions.SELECTED DRAWING: Figure 4

Description

The present invention relates to a sanitary washing device that jets water from a nozzle to a local part of a human body.

Conventionally, as this type of sanitary washing device, one provided with an ultraviolet irradiation device for irradiating water flowing through a flow path from a water supply source to a nozzle with ultraviolet rays is known. For example, Patent Document 1 includes an electromagnetic valve that opens and closes a pipe line that connects to a water supply source, and an ultraviolet irradiation unit that irradiates water flowing through a flow path from the electromagnetic valve to a nozzle with ultraviolet rays, and instructs to start washing the human body. In the sanitary washing device, the solenoid valve is opened when the human body washing is stopped, and the solenoid valve is closed when the human body washing is stopped is instructed. Until then, the thing which irradiates an ultraviolet irradiation part with ultraviolet rays is disclosed.

Further, in Patent Document 2, a preparation mode in which an electromagnetic valve is opened to discharge water while irradiating water with ultraviolet rays before water is discharged from a nozzle to a human body part, and a solenoid valve is opened and water is discharged after the preparation mode. In a sanitary washing device having a human body cleaning mode that discharges the human body part while irradiating the body with ultraviolet rays, the average irradiance of the ultraviolet rays irradiated during the human body cleaning mode is set lower than the average irradiance of the ultraviolet rays irradiated during the preparation mode. Things are disclosed.

JP, 2016-186174, A JP, 2017-197993, A

However, in the above-mentioned sanitary washing device, there is a possibility that the ultraviolet irradiation may be excessive or insufficient depending on the degree of growth of bacteria, and there is still room for improvement.

The sanitary washing device of the present invention mainly aims to sterilize the water in the water flow path from the water supply source to the nozzle more reliably by irradiating ultraviolet rays and suppress the wasteful irradiation of ultraviolet rays to extend the life of the ultraviolet ray irradiating device. And

The sanitary washing device of the present invention employs the following means in order to achieve the above-mentioned main object.

The first sanitary washing device of the present invention is
A sanitary washing device that jets water from a nozzle to a local part of the human body,
An ultraviolet irradiation device that is provided in a water flow path from a water supply source to the nozzle, and that irradiates the water in the water flow path with ultraviolet rays,
Acquiring environment-related information related to the surrounding environment, setting ultraviolet irradiation conditions based on the acquired environment-related information, and controlling the ultraviolet irradiation device so that ultraviolet rays are irradiated according to the set irradiation conditions. A control device,
The main point is to provide.

In the first sanitary washing device of the present invention, an ultraviolet irradiation device that is provided in the water flow path from the water supply source to the nozzle and that irradiates the water in the water flow path with ultraviolet light, and a control device that controls the ultraviolet irradiation device are provided. Prepare The control device acquires environment-related information related to the surrounding environment, sets ultraviolet irradiation conditions based on the acquired environment-related information, and controls the ultraviolet irradiation device so that ultraviolet rays are irradiated according to the set irradiation conditions. To do. The degree of bacterial growth depends on the surrounding environment, so by changing the UV irradiation conditions according to the environment-related information related to the surrounding environment, it is possible to more reliably sterilize water and prevent unnecessary UV irradiation. This can be suppressed to extend the life of the ultraviolet irradiation device.

In the first sanitary washing device of the present invention as described above, the control device acquires the ambient temperature or the temperature in the water flow path as the environmental information, and if the acquired temperature is not within a predetermined range, the predetermined value is obtained. The ultraviolet irradiation device may be controlled by setting the irradiation conditions so that the integrated light amount of ultraviolet rays is reduced as compared with the case of being within the range. When the ambient temperature or the temperature in the water channel is outside the temperature range suitable for the growth of bacteria, the cumulative amount of ultraviolet light is reduced compared to when it is within that temperature range, resulting in insufficient irradiation of ultraviolet light. It is possible to suppress unnecessary irradiation of ultraviolet rays and further extend the life of the ultraviolet irradiation device.

In the first sanitary washing device of the present invention, the control device obtains season-related information regarding the current season as the environment-related information, and if the current season is winter based on the obtained season-related information. In addition, the irradiation condition may be set so that the integrated light amount of ultraviolet rays is reduced as compared with the case of summer, and the ultraviolet irradiation device may be controlled. In winter, the temperature is lower than in summer, and it is thought that the growth of bacteria can be suppressed.Therefore, if the current season is winter, the cumulative amount of ultraviolet rays will be reduced compared to the case of summer, resulting in insufficient irradiation of ultraviolet rays. It is possible to suppress unnecessary irradiation of ultraviolet rays and further extend the life of the ultraviolet ray irradiation device without causing the above.

In the first sanitary washing device of the present invention, the control device may set at least one of irradiation intensity, irradiation time and irradiation frequency of ultraviolet rays as the irradiation condition.

The second sanitary washing device of the present invention is
A sanitary washing device that jets water from a nozzle to a local part of the human body,
An ultraviolet irradiation device that is provided in a water flow path from a water supply source to the nozzle, and that irradiates the water in the water flow path with ultraviolet rays,
When the elapsed time from the previous irradiation of ultraviolet rays is acquired, and when the acquired elapsed time is less than the predetermined time, irradiation is performed so that the integrated light amount of the ultraviolet rays is reduced as compared with the case where the acquired elapsed time is longer than the predetermined time. An irradiation condition that is at least one of intensity and irradiation time is set, and a control device that controls the ultraviolet irradiation device so that ultraviolet rays are irradiated according to the set irradiation condition,
The main point is to provide.

In the second sanitary washing device of the present invention, the control device controls the integrated light amount of the ultraviolet rays when the elapsed time from the previous irradiation of the ultraviolet rays is less than the predetermined time as compared with when the elapsed time is the predetermined time or more. The irradiation condition that is at least one of the irradiation intensity and the irradiation time is set so as to decrease, and the ultraviolet irradiation device is controlled so that the ultraviolet irradiation is performed according to the set irradiation condition. Bacteria will grow over time if they are in the growth temperature range, so by changing the UV irradiation conditions according to the elapsed time from the previous irradiation of UV light, the water can be sterilized more reliably. At the same time, useless irradiation of ultraviolet rays can be suppressed to extend the life of the ultraviolet ray irradiation device.

The third sanitary washing device of the present invention is
A sanitary washing device that sprays water from a nozzle onto a local area of a human body to perform local cleaning,
An ultraviolet irradiation device that is provided in a water flow path from a water supply source to the nozzle, and that irradiates the water in the water flow path with ultraviolet rays,
The cleaning frequency related information on the execution frequency of the local cleaning is acquired, and when the acquired cleaning frequency related information is equal to or higher than a predetermined frequency, the integrated light amount of ultraviolet rays is reduced as compared with the case where the frequency is less than the predetermined frequency. An irradiation condition which is at least one of irradiation intensity and irradiation time, and a control device which controls the ultraviolet irradiation device so that ultraviolet rays are irradiated according to the set irradiation condition,
The main point is to provide.

In the third sanitary washing device of the present invention, the control device irradiates the local washing so that the cumulative light amount of the ultraviolet rays is reduced when the local washing execution frequency is equal to or higher than the predetermined frequency, compared to when the local washing is performed less than the predetermined frequency. An irradiation condition that is at least one of intensity and irradiation time is set, and the ultraviolet irradiation device is controlled so that ultraviolet rays are irradiated according to the set irradiation condition. If the local cleaning is not performed for a long time, the water in the water channel will stay and the bacteria in the water will grow, so by changing the irradiation conditions according to the frequency of the local cleaning, the water can be sterilized more reliably. In addition, unnecessary UV irradiation can be suppressed and the life of the UV irradiation device can be extended.

1 is an external perspective view showing an external appearance of a toilet seat device 10 including a sanitary washing device 20 according to an embodiment of the present invention. It is a block diagram which shows the outline of a structure of the sanitary washing device 20 of embodiment. It is a block diagram which shows the outline of a structure of the ultraviolet sterilization unit 50. 6 is a flowchart showing an example of an ultraviolet irradiation control routine executed by the control device 60 of the sanitary washing device 20. It is an explanatory view showing an example of a map for irradiation intensity setting. It is explanatory drawing which shows the irradiation intensity setting map of a modification. It is explanatory drawing which shows the irradiation intensity setting map of a modification. It is a flowchart which shows the ultraviolet irradiation control routine of a modification. It is explanatory drawing which shows an example of the map for irradiation time setting. It is a flowchart which shows the ultraviolet irradiation control routine of 2nd Embodiment. It is an explanatory view showing an example of a map for irradiation intensity setting. It is a flowchart which shows the ultraviolet irradiation control routine of a modification. It is explanatory drawing which shows an example of the map for irradiation time setting. It is a flowchart which shows the ultraviolet irradiation control routine of 3rd Embodiment. It is an explanatory view showing an example of a map for irradiation intensity setting. It is a flowchart which shows the ultraviolet irradiation control routine of a modification. It is explanatory drawing which shows an example of the map for irradiation time setting. It is a flowchart which shows the ultraviolet irradiation control routine of 4th Embodiment. It is an explanatory view showing an example of a map for irradiation interval setting.

Embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view showing an external appearance of a toilet seat device 10 including a sanitary washing device 20 according to an embodiment of the present invention, and FIG. 2 is a configuration diagram showing a schematic configuration of the sanitary washing device 20 of the embodiment. FIG. 3 is a configuration diagram showing an outline of the configuration of the ultraviolet sterilization unit 50.

As shown in FIG. 1, the toilet seat device 10 is provided on the upper surface of the toilet bowl 1 installed in the toilet room, and includes a toilet seat device body 12 and a toilet seat 12 that is openably and closably supported by the toilet seat device body 12. And a toilet lid 14 that is openably and closably supported by the toilet seat device body 12, and an operation panel 18.

The toilet seat device body 12 includes a sanitary washing device 20 according to an embodiment of the present invention for washing a user's local area. As shown in FIG. 2, the sanitary washing device 20 according to the embodiment includes a water shutoff solenoid valve 22 that controls the supply of wash water from a water supply source to the wash water flow passage 21, and the washing supplied through the wash water flow passage 21. It has a nozzle unit 30 for ejecting water toward a local part of a human body, and a control device 60 for controlling the entire body.

In the cleaning water flow passage 21, a pressure reducing valve 24 for reducing the pressure of the cleaning water supplied from the water supply source through the water shutoff solenoid valve 22 to a predetermined pressure in order from the upstream side, and the cleaning water passing through the pressure reducing valve 24 is irradiated with ultraviolet rays. An ultraviolet sterilization unit 50 for irradiating and sterilizing water, a water temperature sensor 26 for detecting the temperature of washing water, and a heat exchange unit 28 for heating the water having passed through the ultraviolet sterilization unit 50 are provided. In this embodiment, the heat exchange unit 28 has a built-in ceramic heater or the like having a rated output of about 1200 W, for example, and is configured as an instantaneous heat exchange unit capable of instantaneously heating the wash water.

The nozzle unit 30 includes a pulsating pump 32 that adjusts the strength of cleaning, a vacuum breaker 34, a switching valve 36, and a plurality of nozzles 40 to 44. In the present embodiment, the plurality of nozzles 40 to 44 are composed of a bottom washing nozzle 40, a bidet washing nozzle 42, and a nozzle washing nozzle 44 for washing the bottom washing nozzle 40 and the bidet washing nozzle 42. There is. Although not shown, the posterior washing nozzle 40 and the bidet washing nozzle 42 can be moved back and forth between a storage position stored in the nozzle case by a nozzle driving device and an advanced position (cleaning position) advanced from the nozzle case. Has become. The switching valve 36 is configured as a rotary switching valve that switches from which of the plurality of nozzles 40 to 44 the cleaning water discharged from the pulsating pump 32 is ejected. In this embodiment, each discharge port of the switching valve 36 is connected to each nozzle 40 to 44 by a hose.

As shown in FIG. 3, the ultraviolet sterilization unit 50 includes a hollow unit main body 51 having an inflow port 52 and an outflow port 53 communicating with the inside thereof, and an ultraviolet lamp 54 disposed inside the unit main body 51. .. The ultraviolet lamp 54 is composed of, for example, a high-pressure mercury lamp, a metal halide lamp, an LED, or the like, and is disposed inside the unit body 51 penetrating the end wall of the unit body 51. As the ultraviolet lamp 54, a lamp capable of irradiating an ultraviolet ray having a wavelength of about 200 nm to 400 nm can be used. In the present embodiment, for example, an ultraviolet lamp which irradiates an ultraviolet ray having a wavelength of about 250 nm to 280 nm having a higher bactericidal effect is used. And Further, the inner wall of the unit body 51 is covered with a reflection plate 56 made of, for example, aluminum so that the ultraviolet rays are efficiently emitted from the ultraviolet lamp 54 and the ultraviolet rays do not leak to the outside.

The operation panel 18 includes, for example, a buttocks washing button for instructing the start of buttocks washing, a bidet washing button for instructing the start of bidet washing, a stop button for instructing to stop washing, and a washing strength for setting the washing water strength. A setting button, a water temperature setting button for setting the temperature (water temperature) of the wash water, and the like are provided.

The control device 60 is configured as a microcomputer centered on a CPU 62, and includes a ROM 64, a RAM 66, a timer 68, and an input/output port in addition to the CPU 62. An operation signal from the operation panel 18, a seating signal from the seating sensor 19 for detecting the seating of the user on the toilet seat 12, a water temperature Tw from the water temperature sensor 26, and the like are input to the control device 60 via the input ports. There is. From the control device 60, a drive signal to the water shutoff solenoid valve 22, a control signal to the heat exchange unit 28, a drive signal to the pulsation pump 32, a drive signal to the switching valve 36, etc. are output via the output port. There is.

Next, the operation of the toilet seat device 10 (sanitary washing device 20) of the embodiment thus configured, particularly the operation of the ultraviolet sterilization unit 50, will be described. FIG. 4 is a flowchart showing an example of an ultraviolet irradiation control routine executed by the controller 60 of the sanitary washing device 20.

When the ultraviolet irradiation control routine is executed, the CPU 62 of the control device 60 first waits for the seating sensor 19 to detect the seating of the user (step S100). When the seating of the user is detected, the water temperature Tw from the water temperature sensor 26 is input (step S110), and the irradiation intensity US (light amount) is set based on the input water temperature Tw (step S120). Here, in the present embodiment, the setting of the irradiation intensity US is obtained by previously obtaining the relationship between the water temperature Tw and the irradiation intensity US and storing it in the ROM 64 as an irradiation intensity setting map, and when the water temperature Tw is given, the map is set. This is done by deriving the corresponding irradiation intensity US. An example of the irradiation intensity setting map is shown in FIG. The irradiation intensity US is set so as to decrease stepwise as the water temperature Tw moves away from the temperature range (for example, 20° C. to 40° C.) suitable for the growth of bacteria. Since the degree of growth of bacteria existing in water depends on the water temperature, setting the irradiation intensity US based on the water temperature Tw makes it possible to irradiate the unit main body 51 with ultraviolet light just enough. As a result, it is possible to extend the life of the ultraviolet lamp 54 by suppressing unnecessary irradiation of ultraviolet rays while more reliably sterilizing the wash water. As the water temperature Tw, the average water temperature, the minimum water temperature, or the maximum water temperature in the latest predetermined period (for example, the latest one hour) may be used. When the irradiation intensity US is set, the ultraviolet sterilization unit 50 is drive-controlled so that the irradiation of the ultraviolet rays is started at the set irradiation intensity US (step S130), and when a predetermined time (for example, 5 seconds) elapses (step S140), The irradiation of ultraviolet rays is finished (step S150).

Next, the user waits until the bottom washing button or the bidet washing button is operated to instruct the start of local washing (step S160). When the start of the local cleaning is instructed, the ultraviolet sterilization unit 50 is drive-controlled so that the irradiation of the ultraviolet rays is started with a predetermined irradiation intensity (for example, 50%) (step S170). When the buttocks wash button is operated, the CPU 62 drives and controls the nozzle drive device so that the buttocks wash nozzle 40 moves to the advanced position, and then opens the water shutoff solenoid valve 22 to drive the heat exchange unit 28. At the same time, the switching valve 36 is driven and controlled so that the cleaning water that has passed through the heat exchange unit 28 is ejected from the posterior cleaning nozzle 40. On the other hand, when the bidet washing button is operated, the CPU 62 drives and controls the nozzle driving device so that the bidet washing nozzle 42 moves to the advanced position, and then drives and controls the heat exchange unit 28 and passes through the heat exchange unit 28. The switching valve 36 is drive-controlled so that the cleaning water is ejected from the bidet cleaning nozzle 42. Then, it waits until the stop button is operated and the end of the local cleaning is instructed while continuing the irradiation of the ultraviolet rays (step S180). When the end of the local cleaning is instructed, the irradiation of ultraviolet rays is ended (step S190), and this routine is ended. It should be noted that when the stop button is operated, the CPU 62 closes the water shutoff solenoid valve 22 and moves the nozzle (adhesion washing nozzle 40 or bidet washing nozzle 42) that has advanced to the storage position. Drive control. Further, the water shutoff solenoid valve 22 is opened to wash the nozzle as needed, and the switching valve 36 is driven and controlled so that the washing water is jetted from the nozzle 44 for washing the nozzle.

In the sanitary washing device 20 of the present embodiment described above, the irradiation intensity US is set based on the water temperature Tw, and the ultraviolet sterilization unit 50 (ultraviolet lamp 54) is drive-controlled so that the ultraviolet irradiation is performed at the set irradiation intensity US. To do. Since the degree of bacterial growth depends on the surrounding environment, by changing the irradiation intensity US (irradiation condition) according to the water temperature Tw, which is one of the environment-related information, it is possible to more reliably sterilize the wash water and waste it. It is possible to extend the life of the ultraviolet lamp 54 by suppressing the irradiation of such ultraviolet rays.

In the sanitary washing device 20 of the above-described embodiment, the irradiation intensity US is set so as to change stepwise with respect to the change of the water temperature Tw, but the irradiation intensity setting map of the modified example of FIG. As shown, it may be set so as to change linearly with respect to the change of the water temperature Tw, or as shown in the irradiation intensity setting map of the modification of FIG. May be set to do so.

In the sanitary washing device 20 of the above-described embodiment, the irradiation intensity US is set based on the water temperature Tw. However, it may be set based on the outside air temperature instead of the water temperature Tw.

In the sanitary washing device 20 of the above-described embodiment, the irradiation intensity US is set based on the water temperature Tw, and the ultraviolet sterilization unit 50 is set so that the ultraviolet irradiation is performed at the irradiation intensity US set for a predetermined time set in advance. Drive control is performed. However, the irradiation time UT may be set based on the water temperature Tw, and the ultraviolet sterilization unit 50 may be drive-controlled so that the ultraviolet irradiation is performed at a predetermined irradiation intensity that is set in advance over the set irradiation time UT. Then, the irradiation intensity US and the irradiation time UT are set based on the water temperature Tw, and the ultraviolet sterilization unit 50 is driven and controlled so that the ultraviolet irradiation is performed at the irradiation intensity US set over the set irradiation time UT. Good. That is, the irradiation condition may be set so that the integrated light amount of ultraviolet rays is changed according to the water temperature Tw. FIG. 8 shows an ultraviolet irradiation control routine used in the former case. The same steps as those of the routine of FIG. 4 among the processes of the routine of FIG. 8 are designated by the same step numbers, and the description thereof will not be repeated. In the ultraviolet irradiation control routine of FIG. 8, the irradiation time UT is set based on the water temperature Tw input in step S110 (step S120B), and the irradiation of ultraviolet rays is started at a predetermined irradiation intensity (for example, 100%). Then, the ultraviolet sterilization unit 50 is drive-controlled (step S130B). Then, it waits until the set irradiation time UT elapses (step S140B), and when the irradiation time UT elapses, the irradiation of the ultraviolet rays ends (step S150). Here, in setting the irradiation time UT, the relationship between the water temperature Tw and the irradiation time UT is obtained in advance and stored in the ROM 64 as an irradiation time setting map. When the water temperature Tw is given, the corresponding irradiation time UT is calculated from the map. By deriving. An example of the irradiation time setting map is shown in FIG. The irradiation time UT is set so that the water temperature Tw becomes stepwise shorter as the water temperature Tw departs from a temperature suitable for the growth of bacteria. As a result, similarly to the above-described embodiment, it is possible to more surely sterilize the wash water, and suppress unnecessary irradiation of ultraviolet rays to extend the life of the ultraviolet lamp 54. The irradiation time is not limited to be set to change stepwise with respect to the change of the water temperature Tw, and may be set to change linearly with respect to the change of the water temperature Tw. It may be set so as to change in a curved shape with respect to the change of. Further, the irradiation time UT may be set based on the outside air temperature instead of the water temperature Tw.

The sanitary washing device of the second embodiment sets the irradiation intensity US based on the current season S. FIG. 10 is a flowchart showing an example of the ultraviolet irradiation control routine of the second embodiment. Of the processes of the routine of FIG. 10, the same processes as those of the routine of FIG. 4 are designated by the same step numbers, and the description thereof will be omitted to avoid duplication. In the second embodiment, when seating is detected by the seating sensor 19 in step S100, the current season S is input (step S210), and the irradiation intensity US is set based on the input current season S (step S220). ). Then, the irradiation of ultraviolet rays is started at the set irradiation intensity US (step S230), and when a predetermined time (for example, 5 seconds) has elapsed (step S240), the irradiation of ultraviolet rays is ended (step S250). Here, the current season S may be determined based on calendar date by providing a calendar function in the control device 60, or may be determined based on humidity information by providing a hygiene sensor in the sanitary washing device 20, for example. It may be one. When determining the current season S based on the humidity information, for example, when the average humidity or the minimum humidity in one day is less than the first threshold value, it is determined that it is the winter season (low humidity period), and it is more than the first threshold value. It is possible to determine that it is summer (high humidity period) when it is higher than the second threshold, and it is possible to determine that it is intermediate season (spring or autumn) when it is higher than the first threshold and lower than the second threshold. Further, in the second embodiment, the setting of the irradiation intensity US is obtained by previously obtaining the relationship between the current season S and the irradiation intensity US and storing it in the ROM 64 as the irradiation intensity setting map, and when the water temperature Tw is given, This is done by deriving the corresponding irradiation intensity US from the map. An example of the irradiation intensity setting map is shown in FIG. The irradiation intensity US is set to be lower in the case where the current season S is not suitable for bacterial growth (winter) than in the season suitable for bacterial growth (summer). As described above, in the second embodiment, by setting the irradiation intensity US based on the current season S, as is the case with the above-described embodiment, the wash water is sterilized more reliably, and unnecessary ultraviolet irradiation is performed. Can be suppressed and the life of the ultraviolet lamp 54 can be extended.

In the second embodiment, the irradiation intensity US is set on the basis of the current season S, and the ultraviolet sterilization unit 50 is drive-controlled so that the ultraviolet irradiation is performed at the irradiation intensity US set for a predetermined time set in advance. I made it. However, it is assumed that the irradiation time UT is set based on the current season S and the ultraviolet sterilization unit 50 is drive-controlled so that the ultraviolet irradiation is performed with a predetermined irradiation intensity that is set in advance over the set irradiation time UT. Alternatively, the irradiation intensity US and the irradiation time UT are set based on the current season S, and the ultraviolet sterilization unit 50 is driven so that the ultraviolet irradiation is performed at the irradiation intensity US set over the set irradiation time UT. It may be controlled. That is, the irradiation condition may be set so that the integrated light amount of ultraviolet rays is changed according to the current season S. FIG. 12 shows an ultraviolet irradiation control routine used in the former case. It should be noted that, of the processes of the routine of FIG. 12, the same processes as those of the routine of FIG. In the ultraviolet irradiation control routine of FIG. 12, the irradiation time UT is set based on the current season S input in step S210 (step S220B), and ultraviolet irradiation is started at a predetermined irradiation intensity (for example, 100%). (Step S230B). Then, it waits until the set irradiation time UT elapses (step S240B), and when the irradiation time UT elapses, the irradiation of the ultraviolet rays ends (step S250). Here, the setting of the irradiation time UT is obtained by previously obtaining the relationship between the current season S and the irradiation time UT and storing it in the ROM 64 as an irradiation time setting map. When the current season S is given, the map is used. It is performed by deriving the irradiation time UT to be applied. An example of the irradiation time setting map is shown in FIG. The irradiation time UT is set to be shorter when the current season S is a season not suitable for bacterial growth (winter) than in a season suitable for bacterial growth (summer). In this way, by setting the irradiation time UT based on the current season S, as is the case with the second embodiment, it is possible to more surely sterilize the wash water while suppressing unnecessary irradiation of ultraviolet rays, and thus the ultraviolet lamp. The life of 54 can be extended.

The sanitary washing device of the third embodiment sets the irradiation intensity US at the time of irradiating ultraviolet rays this time based on the elapsed time since the last irradiation of ultraviolet rays. FIG. 14 is a flowchart showing an example of the ultraviolet irradiation control routine of the third embodiment. Of the processes of the routine of FIG. 14, the same processes as those of the routine of FIG. 4 are designated by the same step numbers, and the description thereof will be omitted to avoid duplication. In the third embodiment, after the irradiation of ultraviolet rays is finished in step S190, the timer 68 built in the control device 60 newly starts measuring the elapsed time T (step S360), and the ultraviolet ray irradiation control routine is once finished. .. Then, the ultraviolet irradiation control routine is started next, and when the seating of the user is detected in step S100, the measurement of the elapsed time T is ended (step S310), and the irradiation intensity US is set based on the elapsed time T. (Step S320). Then, the irradiation of the ultraviolet rays is started at the set irradiation intensity US (step S330), and when a predetermined time (for example, 5 seconds) has elapsed (step S340), the irradiation of the ultraviolet rays is ended (step S350). Here, in the setting of the irradiation intensity US, in the third embodiment, when the relationship between the elapsed time T and the irradiation intensity US is obtained in advance and stored in the ROM 64 as an irradiation intensity setting map, the elapsed time T is given. , The corresponding irradiation intensity US is derived from the map. An example of the irradiation intensity setting map is shown in FIG. The irradiation intensity US is set to decrease stepwise as the elapsed time T decreases. As a result, similarly to the third embodiment, it is possible to extend the life of the ultraviolet lamp 54 by suppressing unnecessary irradiation of ultraviolet rays while more reliably sterilizing the wash water. In the third embodiment, the irradiation intensity US is set so as to change stepwise with respect to the change of the elapsed time T, but it may be changed linearly with respect to the change of the elapsed time T. It may be set, or may be set so as to change in a curve with respect to the change of the elapsed time T.

In the third embodiment, the irradiation intensity US is set on the basis of the elapsed time T from the previous irradiation of the ultraviolet rays so that the ultraviolet rays are irradiated at the irradiation intensity US set for a predetermined time period. The ultraviolet sterilization unit 50 is drive-controlled. However, the irradiation time UT may be set based on the elapsed time T, and the ultraviolet sterilization unit 50 may be drive-controlled so that the ultraviolet irradiation is performed with a predetermined irradiation intensity that is set in advance over the set irradiation time UT. The irradiation intensity US and the irradiation time UT are set based on the elapsed time T, and the ultraviolet sterilization unit 50 is drive-controlled so that the ultraviolet irradiation is performed at the irradiation intensity US set over the set irradiation time UT. It may be one. That is, the irradiation condition may be set so that the integrated light amount of ultraviolet rays is changed according to the elapsed time T. FIG. 16 shows an ultraviolet irradiation control routine used in the former case. It should be noted that, of the processes of the routine of FIG. 16, the same processes as those of the routine of FIG. 14 are designated by the same step numbers, and the description thereof will be omitted to avoid duplication. In the ultraviolet irradiation control routine of FIG. 16, when the user's seating is detected in step S100 and the measurement of the elapsed time T is completed in step S310, the irradiation time UT is set based on the elapsed time T (step S320B), and in advance. Irradiation of ultraviolet rays is started at a predetermined irradiation intensity (for example, 100%) (step S330B). Then, it waits until the set irradiation time UT elapses (step S340B), and when the irradiation time UT elapses, the irradiation of ultraviolet rays ends (step S350). Here, in setting the irradiation time UT, the relationship between the elapsed time T and the irradiation time UT is obtained in advance and stored in the ROM 64 as an irradiation time setting map. When the elapsed time T is given, the corresponding irradiation This is done by deriving the time UT. An example of the irradiation time setting map is shown in FIG. The irradiation time UT is set such that the shorter the elapsed time T, the shorter the irradiation time UT. In this way, by setting the irradiation time UT based on the elapsed time T from the previous irradiation of ultraviolet rays, as in the third embodiment, the cleaning water is sterilized more reliably and the wasteful ultraviolet rays are used. It is possible to extend the life of the ultraviolet lamp 54 by suppressing the irradiation of the. Although the irradiation time UT is set to change stepwise with respect to the change of the elapsed time T, it may be set to change linearly with respect to the change of the elapsed time T. , May be set to change in a curved shape with respect to the change in the elapsed time T.

In the third embodiment and its modification, the irradiation conditions (irradiation intensity US and irradiation time UT) are set based on the elapsed time T from the previous irradiation of ultraviolet rays, but the elapsed time T and The irradiation condition may be set based on a combination with environment-related information such as the water temperature Tw (or the outside air temperature) and the current season S. In this case, when the water temperature or the outside air temperature is not within the predetermined range, the integrated light amount of ultraviolet rays is reduced as compared with the case where the water temperature or the outside temperature is within the predetermined range, and when the elapsed time T is less than the predetermined time, the predetermined value is set. The irradiation conditions are set so that the integrated light amount of ultraviolet rays decreases compared to the case where it is longer than the time, or when the current season is winter, the integrated light amount of ultraviolet rays is reduced compared to the case of summer, and When the elapsed time T is less than the predetermined time, the irradiation condition can be set so that the integrated light amount of the ultraviolet rays is reduced as compared with the case where the elapsed time T is the predetermined time or more. In addition, the growth amount of the bacteria is estimated based on environment-related information (water temperature Tw, outside air temperature, current season S) and the estimated growth amount is maintained until the elapsed time T has elapsed since the last irradiation of ultraviolet rays. The irradiation conditions may be set so that when the integrated value is less than the predetermined value, the integrated light amount of the ultraviolet rays is reduced when the integrated value is less than the predetermined value.

In the third embodiment and its modification, the irradiation conditions (irradiation intensity US and irradiation time UT) are set based on the elapsed time T from the previous irradiation of ultraviolet rays, but local cleaning is performed last time. The irradiation condition may be set based on the execution interval of the local cleaning (the frequency of executing the local cleaning), which is the elapsed time from the start. Here, in the ultraviolet irradiation control routine of FIG. 16, since ultraviolet rays are always emitted during local cleaning, the elapsed time T from the previous irradiation of ultraviolet rays is replaced with the elapsed time from the previous local cleaning. It should be one.

In the first to third embodiments and the modifications thereof, the ultraviolet sterilization unit 50 is drive-controlled so that the irradiation of ultraviolet rays is started when the sitting sensor 19 detects the sitting of the user. However, an entrance detection sensor for detecting the entry of the user into the toilet room is provided, and when the entry detection sensor detects the entry of the user, the ultraviolet sterilization unit 50 is driven and controlled so that the irradiation of ultraviolet rays is started. Alternatively, when the start of the local cleaning is instructed, the ultraviolet sterilization unit 50 may be drive-controlled so that the irradiation of the ultraviolet rays is started prior to the start of the local cleaning.

In the sanitary washing device of the fourth embodiment, while the seating of the user is not detected (or the entry of the user into the toilet room is not detected), the ultraviolet irradiation interval (based on the environment-related information) Irradiation frequency) is set and ultraviolet rays are irradiated. FIG. 18 is a flowchart showing an example of the ultraviolet irradiation control routine of the fourth embodiment. This routine is repeatedly executed every predetermined time. The same steps as those of the routine of FIG. 4 among the processes of the routine of FIG. 18 are designated by the same step numbers, and the description thereof will not be repeated. In the fourth embodiment, when the irradiation of the ultraviolet rays ends in Steps S180 and S190 with the end of the local cleaning, measurement of the elapsed time T is newly started (Step S400), and the ultraviolet irradiation control routine is once ended. Next, the ultraviolet irradiation control routine is executed, and when it is determined in step S100 that the seating of the user is not detected, the water temperature Tw from the water temperature sensor 26 is input (step S410). Subsequently, the irradiation interval UI is set based on the input water temperature Tw (step S420), and it is determined whether the elapsed time T is equal to or longer than the irradiation interval UI (step S430). When the elapsed time T is less than the irradiation interval UI, it is determined that the ultraviolet irradiation is unnecessary, and the ultraviolet irradiation control routine is once ended. On the other hand, when the elapsed time T is equal to or longer than the irradiation interval UI, the irradiation of ultraviolet rays is started at a predetermined irradiation intensity (for example, 100%) (step S440). Then, it waits for a predetermined time (for example, 5 seconds) to elapse (step S450), and when the predetermined time elapses, the irradiation of the ultraviolet rays is ended (step S460) and the measurement of the elapsed time T is newly started ( (Step S400), the ultraviolet irradiation control routine ends.

Here, regarding the setting of the irradiation interval UI, the relationship between the water temperature Tw and the irradiation interval UI is obtained in advance and stored in the ROM 64 as an irradiation interval setting map, and when the water temperature Tw is given, the corresponding irradiation interval UI is obtained from the map. By deriving. An example of the irradiation interval setting map is shown in FIG. The irradiation interval UI is set so that it becomes shorter stepwise as the water temperature Tw moves away from the temperature range (for example, 20° C. to 40° C.) suitable for the growth of bacteria, that is, the irradiation interval of ultraviolet rays becomes longer (the irradiation frequency is lower). To be done. In this way, by changing the irradiation interval (irradiation frequency) of the ultraviolet rays based on the water temperature Tw that is the environment-related information, as in the first embodiment, the wash water is sterilized more reliably and the unnecessary ultraviolet rays are emitted. It is possible to extend the life of the ultraviolet lamp 54 by suppressing the irradiation of the. The irradiation interval UI is set to change stepwise with respect to the change in the water temperature Tw, but may be set to change linearly with respect to the change in the water temperature Tw. It may be set to change in a curved shape with respect to the change in Tw.

In the fourth embodiment, the irradiation interval UI of ultraviolet rays is changed based on the water temperature Tw, but the irradiation interval UI may be changed based on other environment-related information such as the outside temperature and the current season S. Good. In addition, while the user's seating is not detected (or the user's entry into the toilet room is not detected), ultraviolet rays shall be irradiated at a constant irradiation interval, and the irradiation intensity at the time of ultraviolet ray irradiation The UT and the irradiation time UT may be changed according to the environment-related information.

Correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem will be described. In the embodiment, the posterior washing nozzle 40 and the bidet washing nozzle 42 correspond to "nozzles", the ultraviolet sterilization unit 50 corresponds to "ultraviolet irradiation device", and the control device 60 corresponds to "control device".

The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is that the embodiment implements the invention described in the column of means for solving the problem. Since this is an example for specifically explaining the mode for carrying out the invention, it does not limit the elements of the invention described in the column of means for solving the problem. That is, the interpretation of the invention described in the column of means for solving the problem should be made based on the description in that column, and the embodiment is the invention of the invention described in the column of means for solving the problem. This is just a specific example.

Although the embodiments for carrying out the present invention have been described above with reference to the embodiments, the present invention is not limited to these embodiments, and various embodiments are possible within the scope not departing from the gist of the present invention. Of course, it can be implemented.

INDUSTRIAL APPLICABILITY The present invention is applicable to the sanitary washing device manufacturing industry and the like.

1 Toilet bowl, 10 Toilet seat device, 12 Toilet seat device body, 14 Toilet seat, 16 Toilet lid, 18 Operation panel, 19 Seating sensor, 20 Sanitary washing device, 21 Washing water flow passage, 22 Water-stop solenoid valve, 24 Pressure reducing valve, 26 Water temperature sensor , 28 heat exchange unit, 30 nozzle unit, 32 pulsation pump, 34 vacuum breaker, 36 switching valve, 40 posterior washing nozzle, 42 bidet washing nozzle, 44 nozzle washing nozzle, 50 UV sterilization unit, 51 unit body, 52 flow Inlet, 53 outlet, 54 UV lamp, 60 control device, 62 CPU, 64 ROM, 66 RAM, 68 timer.

Claims (6)

A sanitary washing device that jets water from a nozzle to a local part of the human body,
An ultraviolet irradiation device that is provided in a water flow path from a water supply source to the nozzle, and that irradiates the water in the water flow path with ultraviolet rays,
Acquiring environment-related information related to the surrounding environment, setting ultraviolet irradiation conditions based on the acquired environment-related information, and controlling the ultraviolet irradiation device so that ultraviolet rays are irradiated according to the set irradiation conditions. A control device,
Sanitary washing device equipped with. The sanitary washing device according to claim 1,
The control device acquires the ambient temperature or the temperature in the water flow path as the environmental information, and when the acquired temperature is not within a predetermined range, the integration of ultraviolet rays is performed as compared with the case where the acquired temperature is within the predetermined range. The ultraviolet irradiation device is controlled by setting the irradiation conditions so that the light amount decreases.
Sanitary washing device. The sanitary washing device according to claim 1 or 2, wherein
The control device acquires season-related information regarding the current season as the environment-related information, and based on the acquired season-related information, when the current season is winter, the accumulated light amount of ultraviolet rays is higher than that in the case of summer. Control the ultraviolet irradiation device by setting the irradiation conditions so as to decrease,
Sanitary washing device. The sanitary washing device according to any one of claims 1 to 3,
The control device sets at least one of irradiation intensity of ultraviolet rays, irradiation time and irradiation frequency as the irradiation condition,
Sanitary washing device. A sanitary washing device that jets water from a nozzle to a local part of the human body,
An ultraviolet irradiation device that is provided in a water flow path from a water supply source to the nozzle, and that irradiates the water in the water flow path with ultraviolet rays,
When the elapsed time from the previous irradiation of ultraviolet rays is acquired, and when the acquired elapsed time is less than the predetermined time, irradiation is performed so that the integrated light amount of the ultraviolet rays is reduced as compared with the case where the acquired elapsed time is longer than the predetermined time. An irradiation condition that is at least one of intensity and irradiation time is set, and a control device that controls the ultraviolet irradiation device so that ultraviolet rays are irradiated according to the set irradiation condition,
Sanitary washing device equipped with. A sanitary washing device that sprays water from a nozzle onto a local area of a human body to perform local cleaning,
An ultraviolet irradiation device that is provided in a water flow path from a water supply source to the nozzle, and that irradiates the water in the water flow path with ultraviolet rays,
The cleaning frequency related information on the execution frequency of the local cleaning is acquired, and when the acquired cleaning frequency related information is equal to or higher than a predetermined frequency, the integrated light amount of ultraviolet rays is reduced as compared with the case where the frequency is less than the predetermined frequency. An irradiation condition which is at least one of irradiation intensity and irradiation time, and a control device which controls the ultraviolet irradiation device so that ultraviolet rays are irradiated according to the set irradiation condition,
Sanitary washing device equipped with.

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