JP2020148003A - Sanitary washing device and toilet device - Google Patents

Abstract

To provide a sanitary washing device and a toilet device, wherein a hot water storage type sanitary washing device can detect abnormalities in a temperature sensor that is a target of abnormality detection without need for multiple temperature sensors.SOLUTION: The sanitary washing device according to an aspect of an embodiment comprises a control part that controls a temperature of washing water in a hot water storage tank to approach a preset target temperature by controlling on and off of a heater, wherein the control part has a determination part that determines abnormality of the temperature sensor that has measured a maximum value and a minimum value based on a measured difference value, that is a difference between the maximum value and the minimum value of the temperature within a predetermined period measured by the temperature sensor.SELECTED DRAWING: Figure 2

Description

The disclosed embodiments relate to sanitary cleaning devices and toilet devices.

Conventionally, a sanitary cleaning device that discharges hot water to a local part of the human body has been known. Further, in the instantaneous sanitary cleaning device provided with the first temperature sensor and the second temperature sensor, an abnormality occurs in the second temperature sensor by comparing the water temperatures measured by the first temperature sensor and the second temperature sensor, respectively. A technique for detecting the temperature has been proposed (see, for example, Patent Document 1).

Japanese Patent No. 6284070

However, when the above technology is used, since the first temperature sensor is required to detect the abnormality of the second temperature sensor, the number of temperature sensors for detecting the abnormality increases, which is an improvement from the viewpoint of cost reduction. There is room.

Further, the hot water storage type sanitary cleaning device has a problem that it is difficult to detect an abnormality by a conventional abnormality detection method because the temperature change of hot water is small as compared with the instantaneous type having a large temperature change.

One aspect of the embodiment is made in view of the above, and in a hot water storage type sanitary cleaning device, an abnormality of a temperature sensor to be detected for an abnormality can be detected without requiring a plurality of temperature sensors. It is an object of the present invention to provide a sanitary cleaning device and a toilet device that can be used.

The sanitary cleaning device according to one aspect of the embodiment includes a hot water storage tank for storing wash water, a nozzle for discharging the wash water in the hot water storage tank toward a local part of the human body, and a heater for heating the wash water in the hot water storage tank. A temperature sensor that measures the temperature of the wash water in the hot water storage tank, and a control unit that controls the on and off of the heater to bring the temperature of the wash water in the hot water storage tank closer to a preset target temperature. The control unit measures the maximum value and the minimum value based on the measurement difference value which is the difference between the maximum value and the minimum value of the temperature within a predetermined period measured by the temperature sensor. It is provided with a determination unit for determining an abnormality of.

According to such a configuration, a determination unit that determines an abnormality of the temperature sensor that measures the maximum value and the minimum value based on the measurement difference value that is the difference between the maximum value and the minimum value of the temperature within a predetermined period measured by the temperature sensor. Therefore, it is possible to detect an abnormality of a temperature sensor that is a target of abnormality detection without requiring a plurality of temperature sensors. In addition, since abnormality detection is performed based on the maximum and minimum values of the temperature within a predetermined period, even if the hot water storage type has a slower temperature change than the instantaneous type, the temperature sensor that is the target of abnormality detection Abnormalities can be detected appropriately.

Further, in the sanitary cleaning device described above, the control unit controls the on / off of the heater in a predetermined temperature range so that the temperature of the cleaning water in the hot water storage tank is maintained at the target temperature. In the determination unit, when the period from when the heater is turned on to when it is turned on again is set as the predetermined period, the measurement difference value is the temperature among the plurality of consecutive predetermined periods. The temperature sensor determines that the temperature sensor is abnormal on the condition that the number of the predetermined period smaller than the abnormality determination threshold value, which is a threshold value less than the width, is equal to or more than a predetermined number.

According to this configuration, the temperature sensor is abnormal on the condition that the number of predetermined periods in which the measurement difference value is smaller than the abnormality determination threshold value is equal to or more than a predetermined number among a plurality of consecutive predetermined periods. For the determination, it is possible to suppress the occurrence of erroneous detection in a hot water storage type sanitary cleaning device in which the temperature change may be accidentally reduced due to environmental factors or the like.

Further, in the sanitary cleaning device described above, the determination unit determines that the temperature sensor is abnormal on the condition that the predetermined period in which the measurement difference value is smaller than the abnormality determination threshold value is continuous.

According to this configuration, the temperature sensor determines that the measurement difference value is abnormal on the condition that the measurement difference value is smaller than the abnormality determination threshold value is continuously detected in a plurality of predetermined periods, so that the measurement difference value is determined to be abnormal. Even if it becomes smaller than the threshold value, it is not determined that there is an abnormality in the temperature sensor unless it becomes continuously smaller. Therefore, for example, in a hot water storage type sanitary cleaning device in which the temperature change may be accidentally reduced due to environmental factors or the like, it is possible to suppress the occurrence of false detection.

Further, in the sanitary cleaning device described above, the determination unit is in a hold state in which the determination of whether or not the temperature sensor is abnormal is held when the measurement difference value is smaller than the abnormality determination threshold value. Water discharge from the nozzle is prohibited.

According to such a configuration, since water discharge from the nozzle is prohibited in the hold state, it is possible to prohibit water discharge in a state where the temperature sensor is suspected to be abnormal.

Further, in the sanitary cleaning device described above, the determination unit releases the hold state when the measurement difference value is larger than the abnormality determination threshold value.

According to such a configuration, it is possible to prohibit water discharge when the temperature sensor is suspected to be abnormal in the holding state, and it is possible to discharge water from the nozzle when there is no abnormality in the temperature sensor.

Further, the toilet device according to one aspect of the embodiment includes the above-mentioned sanitary cleaning device and a toilet bowl on which the sanitary cleaning device is installed.

According to such a configuration, a determination unit that determines an abnormality of the temperature sensor that measures the maximum value and the minimum value based on the measurement difference value that is the difference between the maximum value and the minimum value of the temperature within a predetermined period measured by the temperature sensor. Therefore, it is possible to detect an abnormality of a temperature sensor that is a target of abnormality detection without requiring a plurality of temperature sensors. In addition, since abnormality detection is performed based on the maximum and minimum values of the temperature within a predetermined period, even if the hot water storage type has a slower temperature change than the instantaneous type, the temperature sensor that is the target of abnormality detection Abnormalities can be detected appropriately.

According to one aspect of the embodiment, in the hot water storage type sanitary cleaning device, a sanitary cleaning device and a toilet device capable of detecting an abnormality of a temperature sensor to be detected for an abnormality without requiring a plurality of temperature sensors are provided. can do.

FIG. 1 is a perspective view schematically showing a toilet device provided with the sanitary cleaning device according to the first embodiment. FIG. 2 is a diagram showing an example of the configuration of the sanitary cleaning device according to the first embodiment. FIG. 3 is an explanatory diagram schematically showing a hot water storage tank according to the first embodiment. FIG. 4 is an explanatory diagram of heat retention control according to the first embodiment. FIG. 5 is an explanatory diagram of abnormality detection according to the first embodiment. FIG. 6 is a flowchart showing an example of the abnormality detection procedure according to the first embodiment. FIG. 7 is a flowchart showing an example of the abnormality detection procedure according to the second embodiment.

Hereinafter, a mode for carrying out the sanitary cleaning device and the toilet device according to the present disclosure (hereinafter, referred to as “the embodiment”) will be described in detail with reference to the drawings. It should be noted that this embodiment does not limit the sanitary cleaning device and the toilet device according to the present disclosure. In addition, each embodiment can be appropriately combined as long as the processing contents do not contradict each other. Further, in each of the following embodiments, the same parts are designated by the same reference numerals, and duplicate description is omitted.

(First Embodiment)
FIG. 1 is a perspective view schematically showing a toilet device provided with the sanitary cleaning device according to the first embodiment. In addition, in FIG. 1, in order to make the explanation easy to understand, a three-dimensional orthogonal coordinate system in which the X-axis direction, the Y-axis direction, and the Z-axis direction orthogonal to each other are defined and the Z-axis positive direction is the vertically upward direction is shown. It is shown in the figure. Further, in the present specification, the expression "washing water" does not necessarily mean cold water, but may be used to include hot water.

As shown in FIG. 1, the toilet device 1 includes a Western-style toilet bowl (hereinafter referred to as "toilet bowl") 10 and a sanitary cleaning device 20, and is installed in the toilet room TR. The toilet bowl 10 is a low tank type that is washed with the washing water stored in the washing water tank 11, but is not limited to this, and may be, for example, a flush valve type. Further, in the example shown in FIG. 1, the floor-standing type toilet bowl 10 is shown, but the present invention is not limited to this, and a wall-mounted type toilet bowl may be used.

The sanitary cleaning device 20 is provided on the upper part of the toilet bowl 10. The sanitary cleaning device 20 includes a main body 21, a toilet lid 22, and a toilet seat (not shown). Both the toilet lid 22 and the toilet seat are attached to the main body 21 so that they can be opened and closed. The main body 21 includes a case 23. The case 23 stores a nozzle and the like.

FIG. 2 is a diagram showing an example of the configuration of the sanitary cleaning device according to the first embodiment. The sanitary cleaning device 20 includes a water supply channel 30, a valve unit 40, a hot water storage tank 50, a heater 51, an electrolytic cell unit 60, a vacuum breaker 70, a switching valve 80, and a nozzle 90. Further, the sanitary cleaning device 20 includes a hot water thermistor 101 and a limiter thermistor 102. Further, the sanitary cleaning device 20 includes a control unit 200 and a storage unit 250. Further, the control unit 200 includes a determination unit 201 and a heat retention control unit 202.

The heater 51, the hot water thermistor 101, and the limiter thermistor 102 are arranged in the hot water storage tank 50. Further, the water supply channel 30, the valve unit 40, the hot water storage tank 50, the electrolytic cell unit 60, the vacuum breaker 70, the switching valve 80, the nozzle 90, the control unit 200 and the storage unit 250 are housed in the case 23 of the sanitary cleaning device 20. To.

The water supply channel 30 connects the water pipe A, which is an example of a water supply source, to the nozzle 90, and supplies the washing water from the water pipe A to the nozzle 90.

The water supply channel 30 is provided with a valve unit 40, a hot water storage tank 50, an electrolytic cell unit 60, a vacuum breaker 70, and a switching valve 80 in this order from the upstream side (that is, the water pipe A side).

The valve unit 40 opens and closes the water supply channel 30 in response to a control signal from the control unit 200. The hot water storage tank 50 stores wash water. The washing water stored in the hot water storage tank 50 is heated by the heater 51. The details of the hot water storage tank 50 will be described later.

The electrolytic cell unit 60 has an anode plate and a cathode plate inside, and is driven in response to a control signal from the control unit 200 to electrolyze the washing water flowing inside to obtain water containing hypochlorous acid. Generated as functional water.

When a negative pressure is generated in the water supply channel 30, the vacuum breaker 70 prevents the backflow of the washing water from the nozzle 90 to the hot water storage tank 50 or the like by flowing the backflowing washing water to an open air path (not shown).

The switching valve 80 is driven in response to a control signal from the control unit 200 to switch the outflow destination of the washing water flowing through the water supply channel 30. For example, the outflow destination of the washing water flowing through the water supply channel 30 is switched to one of the plurality of discharge ports included in the nozzle 90 by the switching valve 80. Further, the outflow destination of the functional water flowing through the water supply channel 30 is switched to the nozzle cleaning flow path 85 by the switching valve 80. The functional water flowing through the nozzle cleaning flow path 85 is supplied to the surface of the nozzle 90. As a result, the nozzle 90 is washed.

The nozzle 90 discharges the washing water in the hot water storage tank 50 toward the human body of the user seated on the toilet seat. The nozzle 90 is configured to be able to move forward and backward with respect to the case 23 (see FIG. 1). Specifically, a drive source such as a motor (not shown) is connected to the nozzle 90, and the nozzle 90 is retracted into the bowl of the toilet bowl 10 and the case 23 by the drive source. It can be moved forward and backward with and from the stored position. The nozzle 90 cleans the human body local part by discharging the washing water to the human body local part of the user at the advanced position.

The hot water thermistor 101 and the limiter thermistor 102 are temperature sensors that measure the temperature of the washing water in the hot water storage tank 50. The hot water thermistor 101 is used to control the heater 51. The limiter thermistor 102 is used to confirm that the temperature of the washing water discharged from the nozzle 90 is a temperature that is safe for the human body.

The measurement results (hereinafter, referred to as “measured values”) by the hot water thermistor 101 and the limiter thermistor 102 are input to the control unit 200. The measured values of the hot water thermistor 101 and the limiter thermistor 102 are represented by, for example, digital values of 0 to 255 (hereinafter, referred to as “AD value”). The control unit 200 converts the AD value input from the hot water thermistor 101 or the like into a temperature using a conversion table stored in advance in the storage unit 250.

The control unit 200 is realized by executing a program stored in the storage unit 250 using a RAM as a work area by a CPU (Central Processing Unit), an MPU (Micro Processing Unit), or the like. Further, the control unit 200 can be realized by, for example, an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). The control unit 200 controls the valve unit 40, the hot water storage tank 50, the electrolytic cell unit 60, the switching valve 80, and the like based on various input signals. The storage unit 250 is realized by, for example, a semiconductor memory element such as a RAM (Random Access Memory) or a flash memory (Flash Memory).

The control unit 200 controls the on / off of the heater 51 based on the measured value of the hot water thermistor 101 to bring the temperature of the washing water in the hot water storage tank 50 closer to the preset target temperature THc (see FIG. 4).

Further, the control unit 200 determines that the temperature of the washing water flowing out from the hot water storage tank 50 exceeds a temperature safe for the human body when the measured value of the limiter thermistor 102 is equal to or higher than the threshold value. In this case, the control unit 200 stops the temperature control process described above so as not to heat the washing water. Further, not limited to this, the control unit 200 may control the valve unit 40 to forcibly stop the discharge of the washing water when the measured value of the limiter thermistor 102 is equal to or higher than the threshold value.

The determination unit 201 determines whether or not an abnormality has occurred in the temperature sensor set as the target of abnormality detection among the hot water thermistor 101 and the limiter thermistor 102. In the present embodiment, the limiter thermistor 102 is the target of abnormality detection. When the hot water thermistor 101 is set as the target of abnormality detection, the determination unit 201 determines whether or not the hot water thermistor 101 has an abnormality.

The heat retention control unit 202 controls the on / off of the heater 51 within a predetermined temperature range so that the temperature of the washing water in the hot water storage tank 50 is maintained at the target temperature THc. The details of the determination unit 201 and the heat retention control unit 202 will be described later.

FIG. 3 is an explanatory diagram schematically showing a hot water storage tank according to the first embodiment. As described above, the heater 51, the hot water thermistor 101, and the limiter thermistor 102 are arranged inside the hot water storage tank 50. As shown in FIG. 3, the hot water storage tank 50 has an inflow port 52 for flowing wash water into the hot water storage tank 50 from the upstream side of the hot water storage tank 50 and a wash water flowing out from the hot water storage tank 50 to the downstream side of the hot water storage tank 50. It has an outlet 53 to be made to run.

The hot water thermistor 101 is arranged at a position closer to the inflow port 52 than the limiter thermistor 102. The limiter thermistor 102 is arranged at a position closer to the outlet 53 than the hot water thermistor 101. The heater 51 is arranged at a position closer to the inlet 52 than the outlet 53.

When the washing water in the hot water storage tank 50 is heated by the heater 51, the temperature first starts to rise from the vicinity of the inflow port 52 near the heater 51. As shown in W1, the heated wash water gradually starts convection, and the temperature near the outlet 53 gradually rises. Therefore, while the heater 51 is on, the measured value of the hot water thermistor 101 near the inflow port 52 tends to be higher than the measured value of the limiter thermistor 102 near the outflow port 53.

The details of the heat retention control performed by the heat retention control unit 202 will be described with reference to FIG. FIG. 4 is an explanatory diagram of heat retention control according to the first embodiment.

As shown in FIG. 4, the heat retention control unit 202 controls the on / off of the heater 51 with a predetermined temperature range W so that the temperature of the washing water in the hot water storage tank 50 becomes the target temperature THc. The predetermined temperature width W is, for example, a width having an upper limit value THc1 as an upper limit and a lower limit value THc2 as a lower limit.

When the heat retention control unit 202 detects that the measured value of the hot water thermistor 101 exceeds the upper limit value THc1 after heating the washing water by energizing the heater 51 (turning on the heater 51), the heater 51 (Turn off the heater 51). When the heater 51 is turned off, the washing water is naturally cooled. Then, when it is detected that the measured value of the hot water thermistor 101 is below the lower limit value THc2, the heat retention control unit 202 energizes the heater 51 again (turns on the heater 51). In this way, the heat retention control unit 202 repeats heating and cooling of the washing water so that the temperature of the washing water is maintained at the target temperature THc.

In the present embodiment, the heater 51 is turned on and off by energizing the heater 51 and stopping the energization of the heater 51. However, increasing the amount of energization of the heater 51 and the heater This may be done by reducing the amount of electricity supplied to 51.

Although an example in which the heat retention control unit 202 controls the on / off of the heater 51 by using the hot water thermistor 101 is shown here, the heat retention control unit 202 does not use the hot water thermistor 101, but instead of the heater 51. You may control on and off. For example, the heat retention control unit 202 may turn off the heater 51 when a preset time has elapsed after turning on the heater 51. Further, the heat retention control unit 202 may turn on the heater 51 when a preset time has elapsed after turning off the heater 51. Further, when the hot water thermistor 101 is set as the target of abnormality detection, the heat retention control unit 202 temporarily controls the on / off of the heater 51 by using the limiter thermistor 102 at the timing of performing the abnormality detection. You may do so.

Next, the abnormality detection of the limiter thermistor 102 will be described. FIG. 5 is an explanatory diagram of abnormality detection according to the first embodiment. The vertical axis of the graph shown in FIG. 5 shows the temperature corresponding to the measured value of the limiter thermistor 102, and the horizontal axis shows the time. Note that FIG. 5A shows a case where no abnormality has occurred in the limiter thermistor 102. Further, FIG. 5B shows a case where an abnormality has occurred in the limiter thermistor 102. Further, FIG. 5C shows a case where the limiter thermistor 102 is not abnormal, but the temperature change in the hot water storage tank 50 is accidentally reduced due to environmental factors or the like.

When there is no abnormality in the limiter thermistor 102, as shown in FIG. 5A, the measured value of the limiter thermistor 102 is accompanied by the temperature change of the washing water in the hot water storage tank 50 due to the on / off of the heater 51 described above. And fluctuate up and down.

On the other hand, when an abnormality occurs in the limiter thermistor 102, depending on the content of the abnormality, as shown in FIG. 5B, the measured value of the limiter thermistor 102 is the hot water storage tank 50 by turning the heater 51 on and off. Even though the temperature of the washing water inside has changed, it may not change or the change may become small.

On the other hand, in the hot water storage type sanitary cleaning device 20, the temperature change of the cleaning water in the hot water storage tank 50 may be accidentally reduced due to environmental factors and the like. In that case, even if the limiter thermistor 102 does not have an abnormality, the temperature change may be small as shown in FIG. 5 (c).

Therefore, the determination unit 201 of the control unit 200 is based on the difference between the maximum value LM1 and the minimum value LM2 of the temperature measured by the limiter thermistor 102 within the predetermined period T1 (hereinafter, referred to as “measurement difference value LMD”). It was decided to determine the abnormality of the limiter thermistor 102.

In the present embodiment, a case where the period from when the heater 51 is turned on to when it is turned on again is set to a predetermined period T1 will be described as an example. Since the heater 51 is turned on and off a plurality of times in succession, the predetermined period T1 is similarly repeated a plurality of times in succession.

The predetermined period T1 is not always a fixed time. For example, if the heater 51 is turned on and the temperature of the washing water in the water storage tank 50 is rising, and the washing water at room temperature is supplied to the hot water storage tank 50, the temperature of the washing water in the hot water storage tank 50 rises. It may be difficult to climb. At this time, it takes a long time from when the heater 51 is turned on until it is turned on again, and the predetermined period T1 becomes long. As described above, the predetermined period T1 is not always a fixed time, and may be longer or shorter.

The determination unit 201 measures the number of the predetermined period T1 whose measurement difference value LMD is smaller than the abnormality determination threshold Tp among a plurality of consecutive predetermined period T1s. The abnormality determination threshold Tp is a threshold value less than the temperature range W (see FIG. 4). Subsequently, the determination unit 201 compares the measured number with a predetermined number. Then, the determination unit 201 determines that the limiter thermistor 102 is abnormal when the measured number is equal to or more than a predetermined number.

Here, examples of a case where it is determined to be abnormal and a case where it is determined not to be abnormal will be described with reference to FIGS. 5 (b) and 5 (c). In this example, the case where "multiple times" of "consecutive multiple times predetermined period T1" is set to "4 times" and "predetermined number" is set to "2 times" is shown. ..

In the case of the example shown in FIG. 5 (b), the "number of predetermined period T1s in which the measurement difference value LMD is smaller than the abnormality determination threshold Tp" is "3", which is "predetermined number" "twice". That is all. Therefore, the determination unit 201 determines that the limiter thermistor 102 is abnormal.

On the other hand, in the case of the example shown in FIG. 5 (c), "the number of predetermined periods T1 in which the measurement difference value LMD is smaller than the abnormality determination threshold Tp" is "1", and "2" is "a predetermined number". Less than "times". Therefore, the determination unit 201 determines that the limiter thermistor 102 is normal.

Here, an example is shown in which "multiple times" of "a plurality of consecutive predetermined periods T1" is set to "4 times" and "a predetermined number" is set to "2 times". Not limited to this example, it can be changed as appropriate.

As described above, in the sanitary cleaning device 20 according to the first embodiment, the determination unit 201 for determining the abnormality of the limiter thermistor 102 determines the abnormality by comparing the measured value of the hot water thermistor 101 with the measured value of the limiter thermistor 102. Instead, the abnormality of the limiter thermistor 102 is determined based on the measurement difference value LMD which is the difference between the maximum value LM1 and the minimum value LM2 of the temperature within the predetermined period T1 measured by the limiter thermistor 102. Therefore, the abnormality of the limiter thermistor 102 can be detected only by the measured value of the limiter thermistor 102, and the abnormality of the limiter thermistor 102 can be detected without requiring a plurality of temperature sensors.

Further, since the abnormality detection is performed using the maximum value LM1 and the minimum value LM2 of the temperature within the predetermined period T1, even if the temperature of the washing water in the hot water storage tank 50 does not change suddenly, the maximum value within the predetermined period T1 is reached. Since an abnormality can be detected if there is a difference between the value LM1 and the minimum value LM2, the limiter thermistor, which is a temperature sensor that is the target of abnormality detection, even if the hot water storage type has a slower temperature change than the instantaneous type. The abnormality of 102 can be detected appropriately.

Further, in the sanitary cleaning apparatus 20 according to the first embodiment, the number of predetermined period T1 whose measurement difference value LMD is smaller than the abnormality determination threshold Tp is equal to or more than a predetermined number among a plurality of consecutive predetermined period T1. Since the limiter thermistor 102 is determined to be abnormal on the condition that there is a certain condition, it is possible to suppress the occurrence of erroneous detection in the hot water storage type sanitary cleaning device 20 in which the temperature change may be accidentally reduced due to environmental factors or the like.

Subsequently, the procedure for detecting an abnormality will be described with reference to FIG. FIG. 6 is a flowchart showing an example of the abnormality detection procedure according to the first embodiment. Although the case of detecting the abnormality of the limiter thermistor 102 will be described here as an example, the same abnormality detection may be executed for the hot water thermistor 101. That is, the "temperature sensor targeted for abnormality detection" is not limited to the limiter thermistor 102, but may be a hot water thermistor 101.

As shown in FIG. 6, the determination unit 201 calculates the measurement difference value LMD within the predetermined period T1 (step S101). Specifically, the maximum value LM1 and the minimum value LM2 among the measured values input from the limiter thermistor 102 are stored within the predetermined period T1. Further, the determination unit 201 updates the maximum value LM1 when a measurement value larger than the stored maximum value LM1 is input within the predetermined period T1, and inputs a measurement value smaller than the stored minimum value LM2. If so, the minimum value LM2 is updated. Then, the determination unit 201 calculates the difference between the maximum value LM1 and the minimum value LM2 at the end of the predetermined period T1 as the measurement difference value LMD.

Subsequently, the determination unit 201 determines whether or not the measurement difference value LMD is smaller than the abnormality determination threshold value Tp (step S102).

When it is determined in step S102 that the measurement difference value LMD is smaller than the abnormality determination threshold value Tp (step S102, Yes), the determination unit 201 prohibits water discharge from the nozzle 90 as a hold state for suspending the determination (step S103). ).

On the other hand, when it is determined in step S102 that the measurement difference value LMD is larger than the abnormality determination threshold value Tp (step S102, No), the determination unit 201 determines whether or not the current state is the pending state (step). S104). In this process, when it is determined that the current state is the hold state (step S104, Yes), the determination unit 201 releases the hold state (step S105) and ends the process. Further, in step S104, when the current state is not the hold state (step S104, No), the determination unit 201 ends the process without performing the process of step S105.

Following step S103, the determination unit 201 predetermined a predetermined period T1 (hereinafter, referred to as “predetermined period T1 determined to be held”) in which the measurement difference value LMD is determined to be smaller than the abnormality determination threshold value Tp. It is determined whether or not the number is N or more consecutive times (step S106). In step S106, when the predetermined period T1 determined to be held is not consecutive N times or more (steps S106, No), the determination unit 201 returns the process to step S101 and continues the process.

On the other hand, in step S106, when the predetermined period T1 determined to be held is continuous N times or more (step S106, Yes), the determination unit 201 determines that the limiter thermistor 102 is abnormal (step S107), and performs an abnormality response process. (Step S108), and then the process is terminated.

As an abnormality response process, the determination unit 201 causes an abnormality in the limiter thermistor 102 by, for example, lighting an LED (Light Emitting Diode) indicator provided in the main body 21 of the sanitary cleaning device 20 or an operation unit (not shown). You may notify the user of this. Further, the determination unit 201 may prohibit the temperature control process by the heater 51 as an abnormality response process so that the washing water having a temperature exceeding the set temperature is not discharged to the human body.

As described above, in the sanitary cleaning apparatus 20 according to the first embodiment, the limiter thermistor 102 is determined to be abnormal on the condition that the measurement difference value LMD is smaller than the abnormality determination threshold value Tp and T1 is continuous for a predetermined period. As a result, even if the measurement difference value LMD becomes smaller than the abnormality determination threshold value Tp, it is not determined that the limiter thermistor 102 has an abnormality unless it continuously decreases. Therefore, the temperature change happens to be small due to environmental factors or the like. In the hot water storage type sanitary cleaning device 20 in some cases, it is possible to suppress the occurrence of erroneous detection.

Further, the determination unit 201 puts the determination of whether or not the temperature sensor is abnormal when the measurement difference value LMD is smaller than the abnormality determination threshold value Tp into a hold state, and prohibits water discharge from the nozzle 90 in the hold state. .. Further, when the measurement difference value LMD is larger than the abnormality determination threshold value Tp, the hold state is released.

As described above, in the sanitary cleaning device 20 according to the first embodiment, since water discharge from the nozzle 90 is prohibited in the holding state, it is possible to prohibit water discharge in a state where the temperature sensor is suspected to be abnormal. Further, if there is no abnormality in the temperature sensor, water can be discharged from the nozzle 90.

Here, an example in which an abnormality determination is performed while the heat retention control unit 202 is performing the heat retention control has been described, but the heat retention control by the heat retention control unit 202 is always performed at the execution timing of the abnormality determination of the limiter thermistor 102. Not limited to while being struck. For example, the abnormality determination of the limiter thermistor 102 may be performed when the power is turned on to the sanitary cleaning device 20. As a result, for example, even if an abnormality has occurred in the limiter thermistor 102 even before the power is turned on, the abnormality can be detected at an early stage.

(Second Embodiment)
The limiter thermistor 102 does not continuously detect that the measurement difference value LMD is smaller than the abnormality determination threshold value Tp, but detects a predetermined number or more within a predetermined period of a plurality of times. May be determined to be abnormal.

The procedure for detecting an abnormality according to the second embodiment will be described with reference to FIG. 7. FIG. 7 is a flowchart showing an example of the abnormality detection procedure according to the second embodiment.

As shown in FIG. 7, the determination unit 201 first calculates the measurement difference value LMD within the predetermined period T1, and measures the number of the predetermined period T1 whose measurement difference value LMD is smaller than the abnormality determination threshold Tp (step S201). ). Then, it is determined whether or not the measured number is M or more, which is a predetermined number (step S202).

In step S202, when it is determined that the number of predetermined periods T1 whose measurement difference value LMD is smaller than the abnormality determination threshold Tp is not M or more (steps S202, No), the determination unit 201 ends the process.

On the other hand, in step S202, when it is determined that the number of predetermined periods T1 whose measurement difference value LMD is smaller than the abnormality determination threshold Tp is M or more (steps S202, Yes), the determination unit 201 has an abnormality in the limiter thermistor 102. It is determined that there is (step S203), the abnormality handling process is performed (step S204), and then the process is terminated.

As described above, in the sanitary cleaning apparatus 20 according to the second embodiment, even if the measurement difference value LMD accidentally becomes larger than the abnormality determination threshold value Tp and is not continuous, the abnormality of the limiter thermistor 102 can be detected. That is, it is possible to more reliably detect an abnormality in the limiter thermistor 102, which is a temperature sensor that is the target of abnormality detection.

As in the first embodiment, when the determination unit 201 determines that the measurement difference value LMD is smaller than the abnormality determination threshold value Tp, the determination unit 201 may prohibit water discharge from the nozzle 90 as a hold state for suspending the determination. ..

As described above, according to the sanitary cleaning device 20 according to the embodiment, the determination unit 201 for determining the abnormality of the limiter thermistor 102 compares the measured value of the hot water thermistor 101 with the measured value of the limiter thermistor 102 and makes an abnormality. Is not determined, but the abnormality of the limiter thermistor 102 is determined based on the measurement difference value LMD which is the difference between the maximum value LM1 and the minimum value LM2 of the temperature within the predetermined period T1 measured by the limiter thermistor 102. Therefore, the abnormality of the limiter thermistor 102 can be detected only by the measured value of the limiter thermistor 102, and the abnormality of the limiter thermistor 102 can be detected without requiring a plurality of temperature sensors.

Further effects and variations can be easily derived by those skilled in the art. For this reason, the broader aspects of the invention are not limited to the particular details and representative embodiments expressed and described as described above. Therefore, various modifications can be made without departing from the spirit or scope of the general concept of the invention as defined by the appended claims and their equivalents.

A Water pipe TR Toilet room 1 Toilet device 10 Toilet bowl 20 Sanitary cleaning device 30 Water supply channel 40 Valve unit 50 Hot water storage tank 51 Heater 60 Electrolytic tank unit 70 Vacuum breaker 80 Switching valve 85 Nozzle cleaning flow path 90 Nozzle 101 Hot water thermista 102 Limiter thermistor 200 Control unit 201 Judgment unit 202 Heat retention control unit 250 Storage unit LM1 Maximum value LM2 Minimum value LMD Measurement difference value Tp Abnormality judgment threshold THc Target temperature W Temperature width

Claims (6)

A hot water storage tank that stores wash water and
A nozzle that discharges the washing water in the hot water storage tank toward the human body,
A heater that heats the washing water in the hot water storage tank and
A temperature sensor that measures the temperature of the washing water in the hot water storage tank, and
A control unit that brings the temperature of the washing water in the hot water storage tank closer to a preset target temperature by controlling the on and off of the heater.
With
The control unit
A determination unit for determining an abnormality of the temperature sensor that has measured the maximum value and the minimum value based on a measurement difference value that is a difference between the maximum value and the minimum value of the temperature within a predetermined period measured by the temperature sensor is provided. , Sanitary cleaning equipment. The control unit
A heat retention control unit for controlling the on / off of the heater in a predetermined temperature range so that the temperature of the washing water in the hot water storage tank is maintained at the target temperature is provided.
The determination unit
When the period from when the heater is turned on to when it is turned on again is set as the predetermined period, an abnormality determination in which the measurement difference value is a threshold value less than the temperature range among a plurality of consecutive predetermined periods. The sanitary cleaning device according to claim 1, wherein the temperature sensor determines that the temperature sensor is abnormal on the condition that the number of the predetermined period smaller than the threshold value is equal to or more than a predetermined number. The determination unit
The sanitary cleaning device according to claim 2, wherein the temperature sensor determines that the temperature sensor is abnormal on the condition that the predetermined period in which the measurement difference value is smaller than the abnormality determination threshold value is continuous. The determination unit
Claim 2 or claim 2, wherein when the measurement difference value is smaller than the abnormality determination threshold value, the determination of whether or not the temperature sensor is abnormal is put on hold, and water discharge from the nozzle is prohibited in the hold state. The sanitary cleaning device according to 3. The determination unit
The sanitary cleaning device according to claim 4, wherein the holding state is released when the measurement difference value is larger than the abnormality determination threshold value. The sanitary cleaning device according to any one of claims 1 to 5.
The toilet bowl on which the sanitary cleaning device is installed and
A toilet device.

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