JP7222279B2 - Sanitary washing equipment and toilet equipment - Google Patents

Description

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

Conventionally, there has been known a sanitary washing device that spouts warm water to the private parts of the human body. Further, in the sanitary washing apparatus including the first temperature sensor and the second temperature sensor, the temperature sensor is abnormal based on whether the temperatures detected by the first temperature sensor and the second temperature sensor are in a predetermined relationship. There has been proposed a technique for detecting whether or not water is discharged safely (see, for example, Patent Literature 1).

JP 2017-115298 A

However, in the above technique, an error may occur between the output value of the temperature sensor and the actual temperature due to factors such as deterioration of the temperature sensor over time. In such a case, there is a problem that it becomes difficult to operate the sanitary washing device continuously.

In addition, the hot water storage type sanitary washing device tends to equalize the temperature of the washing water in the hot water storage tank compared to the instant type, which does not store washing water. However, there is a problem that it is difficult to suppress the influence on the human body caused by this.

One aspect of the embodiment has been made in view of the above, and provides a sanitary washing device of a hot water storage type that can continue the operation of the sanitary washing device while suppressing the influence on the human body. The object is to provide a toilet apparatus.

A sanitary washing apparatus according to an aspect of an embodiment includes a hot water storage tank that stores wash water, a nozzle that spouts the wash water in the hot water storage tank toward the private parts of a human body, and a heater that heats the wash water in the hot water storage tank. a first temperature sensor and a second temperature sensor for measuring the temperature of the wash water in the hot water storage tank; a control unit that performs heat retention control to bring the temperature closer to a target temperature, wherein the control unit controls the temperature difference between a first temperature that is a value measured by the first temperature sensor and a second temperature that is a value measured by the second temperature sensor. a correction unit that corrects the value of at least one of the first temperature and the second temperature based on

If there is a temperature difference in the measured values of the temperature sensors that are supposed to equalize and measure the same temperature, there is a possibility that either the first temperature sensor or the second temperature sensor is malfunctioning. According to the sanitary washing device according to one aspect of the embodiment, even in such a case, at least one of the first temperature and the second temperature is adjusted based on the difference between the first temperature and the second temperature. Since the value is corrected, the operation of the sanitary washing device can be continued while suppressing the influence of the malfunction on the human body.

Further, the correction unit corrects the lower measured value of the first temperature and the second temperature to the higher measured value.

According to such a configuration, by correcting the measured value of the lower temperature to the measured value of the higher temperature, it is possible to suppress the high-temperature wash water from being spouted toward the private parts of the human body. Therefore, the influence on the human body can be suppressed more appropriately.

Further, the control unit includes a heat retention control unit that performs the heat retention control to bring the wash water in the hot water storage tank closer to the target temperature by controlling the heater based on the first temperature, and a heat retention control unit that performs the heat retention control based on the second temperature. and a determination unit that determines whether or not to prohibit water discharge from the nozzles, and the correction unit adjusts the second temperature to the first temperature when the second temperature is lower than the first temperature. corrected to

According to this configuration, by correcting the second temperature for determining whether or not water is discharged from the nozzle to the human body's private parts, it is possible to suppress the high-temperature washing water from being discharged toward the human body's private parts. Therefore, the operation of the sanitary washing device can be continued while suppressing the influence on the human body.

Further, the correction unit corrects the measured value immediately before turning on the heater during execution of the heat retention control.

According to this configuration, since the correction is performed immediately before turning on the heating of the heater during execution of the heat retention control, the temperature of the wash water in the hot water storage tank is assumed to be more uniform. can be performed, and the temperature difference between the first temperature and the second temperature can be determined more accurately.

Furthermore, a toilet apparatus according to one aspect of the embodiment includes the above-described sanitary washing apparatus and a toilet on which the sanitary washing apparatus is installed.

According to such a configuration, when there is a temperature difference in the measured values of the temperature sensors that are supposed to measure the same temperature with uniformity, the first temperature is calculated based on the temperature difference between the first temperature and the second temperature. and the second temperature, the value of the temperature sensor can be corrected even if an error occurs due to factors such as deterioration of the temperature sensor over time. Therefore, the operation of the sanitary washing device can be continued while suppressing the influence on the human body.

According to one aspect of the embodiment, it is possible to provide a sanitary washing device and a toilet device that can continue the operation of the sanitary washing device while suppressing the influence on the human body in the hot water storage type sanitary washing device.

FIG. 1 is a perspective view schematically showing a toilet device equipped with a sanitary washing device according to a first embodiment. FIG. 2 is a diagram showing an example of the configuration of the sanitary washing device according to the first embodiment. FIG. 3 is an explanatory diagram schematically showing the hot water storage tank according to the first embodiment. FIG. 4 is an explanatory diagram of heat retention control. FIG. 5 is an explanatory diagram of temperature drift. FIG. 6 is a graph showing measured values by the temperature sensor according to the first embodiment. FIG. 7 is a flow chart showing an example of a correction procedure according to the first embodiment. FIG. 8 is a flowchart showing an example of a correction procedure according to the second embodiment.

EMBODIMENT OF THE INVENTION Below, the form (it describes as "embodiment" hereafter) for implementing the sanitary washing apparatus and toilet apparatus which concern on this indication is demonstrated in detail, referring drawings. Note that the sanitary washing device and the toilet device according to the present disclosure are not limited to this embodiment. Further, each embodiment can be appropriately combined within a range that does not contradict the processing contents. Also, in each of the following embodiments, the same parts are denoted by the same reference numerals, and overlapping descriptions are omitted.

(First embodiment)
FIG. 1 is a perspective view schematically showing a toilet device equipped with a sanitary washing device according to a first embodiment. In order to make the explanation easier to understand, FIG. 1 shows a three-dimensional orthogonal coordinate system in which the X-axis direction, the Y-axis direction, and the Z-axis direction are defined to be orthogonal to each other, and the Z-axis positive direction is the vertically upward direction. Illustrated. Moreover, in this specification, the expression "washing water" does not necessarily mean cold water, but may be used to mean including hot water.

As shown in FIG. 1, the toilet apparatus 1 includes a western-style toilet bowl (hereinafter referred to as "toilet bowl") 10 and a sanitary washing device 20, and is installed in the toilet room TR. The toilet bowl 10 is of a low tank type in which flush water stored in a flush water tank 11 is used for flushing, but is not limited to this, and may be of a flush valve type, for example. In the example shown in FIG. 1, the floor-mounted toilet bowl 10 is shown, but the present invention is not limited to this, and a wall-mounted toilet bowl or the like may be used.

A sanitary washing device 20 is provided above the toilet bowl 10 . The sanitary washing device 20 includes a body portion 21, a toilet lid 22, and a toilet seat (not shown). Both the toilet lid 22 and the toilet seat are attached to the body portion 21 so as to be openable and closable. The body portion 21 has a case 23 . The case 23 accommodates the nozzle 90 and the like.

FIG. 2 is a diagram showing an example of the configuration of the sanitary washing device according to the first embodiment. The sanitary washing device 20 includes a water supply path 30 , a valve unit 40 , a hot water tank 50 , a heater 51 , an electrolytic cell unit 60 , a vacuum breaker 70 , a switching valve 80 and a nozzle 90 . The sanitary washing device 20 also includes a hot water thermistor 101 and a limiter thermistor 102 . The sanitary washing device 20 also includes a control section 200 and a storage section 250 . The control unit 200 also includes a determination unit 201 , a heat retention control unit 202 and a correction unit 203 .

Heater 51 , hot water thermistor 101 and limiter thermistor 102 are arranged in hot water storage tank 50 . Water supply path 30 , valve unit 40 , hot water tank 50 , electrolytic cell unit 60 , vacuum breaker 70 , switching valve 80 , nozzle 90 , control unit 200 and storage unit 250 are housed inside case 23 of sanitary washing device 20 . be.

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

The water supply path 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 passage 30 according to a control signal from the controller 200 . The hot water storage tank 50 stores wash water. The wash water stored in the hot water storage tank 50 is heated by the heater 51 . Details of the hot water storage tank 50 will be described later.

The electrolyzer unit 60 has an anode plate and a cathode plate inside thereof, and is driven in accordance with a control signal from the control unit 200 to electrolyze washing water flowing therein to produce water containing hypochlorous acid. Produced as functional water.

The vacuum breaker 70 prevents backflow of wash water from the nozzle 90 to the hot water storage tank 50 and the like by causing the backflow of wash water to flow through an air opening path (not shown) when negative pressure is generated in the water supply passage 30 .

The switching valve 80 is driven according to a control signal from the control unit 200 to switch the outflow destination of the cleansing water flowing through the water supply path 30 . For example, the wash water flowing through the water supply path 30 is switched by the switching valve 80 to any one of a plurality of outlets provided in the nozzle 90 . The functional water flowing through the water supply path 30 is switched to the nozzle cleaning flow path 85 by the switching valve 80 . The functional water flowing through the nozzle cleaning channel 85 is supplied to the surface of the nozzle 90 . The nozzle 90 is thereby cleaned.

The nozzle 90 spouts cleansing water in the hot water storage tank 50 toward the private parts of the human body of the user sitting on the toilet seat. The nozzle 90 is configured to be able to advance and retreat with respect to the case 23 (see FIG. 1). Specifically, the nozzle 90 is connected to a driving source such as a motor (not shown). Moved to and from the stored position. The nozzle 90 discharges cleansing water to the user's body parts at the advanced position to wash the body parts.

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

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

The control unit 200 is realized by executing a program stored in the storage unit 250 by a CPU (Central Processing Unit), an MPU (Micro Processing Unit), or the like, using the RAM as a work area. Also, the control unit 200 can be implemented by 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, etc. based on various signals that are input. Storage unit 250 is realized by a semiconductor memory element such as RAM (Random Access Memory), flash memory, or the like.

The control unit 200 controls the on/off of the heater 51 based on the measured value of the hot water thermistor 101, thereby performing heat retention control to bring the temperature of the wash water in the hot water storage tank 50 closer to a preset target temperature THc.

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

Judgment unit 201 judges whether or not a temperature sensor set as an abnormality detection target among hot water thermistor 101 and limiter thermistor 102 is abnormal. In this embodiment, the limiter thermistor 102 is the target of abnormality detection. If the hot water thermistor 101 is set as an abnormality detection target, the determination unit 201 determines whether or not the hot water thermistor 101 is abnormal.

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

The correcting unit 203 corrects the measured values when, for example, the hot water thermistor 101 or the limiter thermistor 102 has an error due to aged deterioration or the like and an error occurs in both the measured values. In this embodiment, one of the measured values is corrected, but both may be corrected. A correction method will be described later.

FIG. 3 is an explanatory diagram schematically showing the 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 inlet 52 through which wash water flows into the hot water storage tank 50 from the upstream side of the hot water storage tank 50, and an inflow port 52 through which wash water flows out of the hot water storage tank 50 to the downstream side of the hot water storage tank 50. and an outflow port 53 that allows

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

When the wash water in the hot water storage tank 50 is heated by the heater 51 , the temperature begins to rise near the inlet 52 near the heater 51 . The heated wash water gradually begins to convect, as indicated by W1, 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 inlet 52 tends to be higher than the measured value of the limiter thermistor 102 near the outlet 53 .

The wash water in the hot water storage tank 50 is gradually homogenized. Therefore, after a while after the heater 51 is turned off, the measured value of the hot water thermistor 101 and the measured value of the limiter thermistor 102 are likely to be approximately the same value.

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.

As shown in FIG. 4, the heat retention control unit 202 controls the ON/OFF of the heater 51 within a predetermined temperature range W so that the temperature of the wash water in the hot water storage tank 50 reaches 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.

After heating the wash water by energizing the heater 51 (turning on the heater 51), the heat retention control unit 202 detects that the measured value of the hot water thermistor 101 has exceeded the upper limit value THc1. (heater 51 is turned off). The washing water is naturally cooled by turning off the heater 51 . Then, when detecting that the measured value of the hot water thermistor 101 has fallen below the lower limit THc2, the heat retention control unit 202 again energizes the heater 51 (turns on the heater 51). In this manner, the heat retention control unit 202 repeats heating and cooling of the cleaning water so that the temperature of the cleaning 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. This may be done by reducing the amount of power supplied to 51 .

The hot water thermistor 101 and the limiter thermistor 102 may undergo a phenomenon called temperature drift due to deterioration over time due to, for example, long-term use of the sanitary washing device 20 . This point will be described with reference to FIG. FIG. 5 is an explanatory diagram of temperature drift.

As described above, the control unit 200 converts the AD value input from the temperature sensor such as the hot water thermistor 101 into a temperature using a pre-stored conversion table. The temperature is recognized and taken as the measured value of each temperature sensor. For example, as exemplified in FIG. According to the conversion table, it recognizes that the temperature of the water at the place where the limiter thermistor 102 is arranged is "40°C".

However, when a temperature drift occurs in the limiter thermistor 102, the limiter thermistor 102 outputs the AD value "80" to the control unit 200 even though the actual water temperature is, for example, 45.degree. In this case, the control unit 200 erroneously determines that the temperature of the water at the place where the limiter thermistor 102 is arranged is "40°C" corresponding to the AD value "80", even though the temperature is actually 45°C. recognize. As a result, as indicated by the arrow in FIG. 5, the actual temperature of the water discharged from the nozzle 90 is shifted 5° C. higher than the target temperature of 40° C., and the 45° C. will be discharged to

Thus, the temperature drift is a phenomenon in which the temperature pre-associated with the AD value output from the temperature sensor deviates from the actual temperature. This is a phenomenon, and temperature drift may occur, which may make it difficult to appropriately control the temperature of the water discharged to the human body. Although the case where the AD value of the limiter thermistor 102 shifts to the high temperature side has been described here, the AD value of the limiter thermistor 102 may shift to the low temperature side due to temperature drift.

FIG. 6 is a graph showing measured values by the temperature sensor according to the first embodiment. In this embodiment, the hot water thermistor 101 is used as the first temperature sensor, and the value measured by the hot water thermistor 101 is the first temperature. Also, the limiter thermistor 102 is used as a second temperature sensor, and the value measured by the limiter thermistor 102 is used as the second temperature.

FIG. 6 shows a graph of a state in which the heat retention control section 202 of the control section 200 is performing heat retention control. FIG. 6 also shows a period before the heater 51 (see FIG. 3) starts heating the wash water in the hot water storage tank 50 (see FIG. 3) (for example, when the sanitary washing device 20 is powered on). A pre-heating section Ta and a stable section Tb, which is a section before the heater 51 is turned on and off after a while, is shown. In FIG. 6, the first temperature is indicated by a solid line and the second temperature is indicated by a dashed line.

FIG. 6A shows a state in which there is no error in the measured values of the hot water thermistor 101 and the limiter thermistor 102 due to factors such as deterioration over time. On the other hand, FIG. 6B shows a state in which the limiter thermistor 102 has an error in the measured value due to factors such as aged deterioration.

In FIG. 6(a), since there is no error in the measured values of the hot water thermistor 101 and the limiter thermistor 102 due to factors such as deterioration over time, the first temperature and the second temperature are the actual temperatures in the hot water storage tank 50. showing. As shown in FIG. 6(a), the second temperature fluctuates so as to follow the first temperature with a slight delay. This is because, as described above, the temperature near the inlet 52 (see FIG. 3) of the hot water storage tank 50 rises first, and then the temperature near the outlet 53 (see FIG. 3) also rises due to convection. .

Although there is a section where there is a difference between the first temperature and the second temperature, in the pre-heating section Ta and the stable section Tb enclosed by the dotted line, the first temperature and the second temperature have substantially the same values. ing. That is, it can be assumed that the temperature of the wash water in the hot water storage tank 50 is uniform between the pre-heating section Ta and the stable section Tb.

In FIG. 6B, the limiter thermistor 102 has an error in the measured value due to factors such as aged deterioration. Therefore, the value indicated by the first temperature is the actual temperature in the hot water storage tank 50 , but the value indicated by the second temperature is different from the actual temperature in the hot water storage tank 50 . Note that the example of FIG. 6B shows a case where a value lower than the actual temperature is indicated. The second temperature shown in FIG. 6(b) shows a lower value than the second temperature shown in FIG. 6(a).

As described above, if the limiter thermistor 102 has an error in the measured value due to factors such as deterioration over time (temperature drift occurs), it is difficult to appropriately control the temperature of the water discharged to the human body. may become

Therefore, the correction unit 203 of the control unit 200 adjusts the first temperature and the A temperature difference of the second temperature is calculated. For example, when a preset time has elapsed since heater 51 was turned off, correction unit 203 determines that it is immediately before heater 51 is turned on, and corrects the temperature difference between the first temperature and the second temperature. can be calculated. Further, the correction unit 203 may calculate the temperature difference between the first temperature and the second temperature, for example, when the temperature change rate of the first temperature or the second temperature is equal to or less than a preset value. Further, the correction unit 203 may calculate the temperature difference between the first temperature and the second temperature when the first temperature reaches a preset value.

Then, the first temperature and the second temperature are compared, and if the second temperature is lower than the first temperature, the second temperature is corrected to the first temperature by adding the temperature difference value to the second temperature. .

Specifically, as indicated by arrows in FIG. When the second temperature is 29°C, the correction unit 203 corrects the second temperature to 34°C by adding 5°C to the second temperature. Then, until the next correction, a value obtained by adding 5° C. to the original measured second temperature is used as the corrected second temperature. Note that the determination unit 201 determines whether or not to prohibit water discharge from the nozzle 90 based on the corrected second temperature.

A correction procedure will be described with reference to FIG. FIG. 7 is a flow chart showing an example of a correction procedure according to the first embodiment. Note that the correction unit 203 starts correction when the timing comes just before the heating of the heater 51 (see FIG. 3) is turned on during execution of the heat retention control.

As shown in FIG. 7, the correction unit 203 acquires the first temperature and the second temperature from the hot water thermistor 101 and the limiter thermistor 102 (step S101), and calculates the temperature difference between the first temperature and the second temperature (step S102). In step S102, the correction unit 203 may subtract the second temperature from the first temperature, or may subtract the first temperature from the second temperature.

Subsequently, the correction unit 203 determines whether or not the second temperature is lower than the first temperature using the calculation result of step S102 (step S103). For example, if the first temperature is subtracted from the second temperature in step S102, the correction unit 203 determines that the second temperature is lower than the first temperature when the calculation result is negative.

When it is determined in step S103 that the second temperature is lower than the first temperature (step S103, Yes), the correction unit 203 corrects the second temperature to the first temperature (step S104). Specifically, a value obtained by adding the value of the temperature difference calculated in step S102 to the second temperature before correction is set as the second temperature after correction. After that, the process ends.

On the other hand, if it is determined in step S103 that the second temperature is equal to or higher than the first temperature (step S103, No), the correction unit 203 corrects the first temperature to the second temperature (step S105). Specifically, a value obtained by adding the value of the temperature difference calculated in step S102 to the first temperature before correction is recognized as the first temperature after correction. After that, the process ends.

In the present embodiment, the value of the temperature difference calculated in step S102 is added as it is. However, correction may be made so that the second temperature approaches the first temperature. For example, half the calculated temperature difference is added. may be used, or the correction may be performed using a predetermined calculation formula.

Note that at the time of the next correction, the correction unit 203 does not use the corrected values of the first temperature and the second temperature, but the first temperature and the second temperature (raw values) before correction. Correction is performed by

Thus, in the sanitary washing device 20 according to the first embodiment, the controller 200 corrects the value of at least one of the first temperature and the second temperature based on the temperature difference between the first temperature and the second temperature. A correction unit 203 is provided. Specifically, the correction unit 203 adds the temperature difference value (absolute value) to the lower temperature measurement value or subtracts it from the higher temperature measurement value. For this reason, the correcting unit 203 can correct a temperature difference when there is a temperature difference in the measured values of the temperature sensors that are supposed to measure the temperature at the same level with uniformity.

Therefore, even if an error such as a temperature drift occurs due to factors such as deterioration of the temperature sensor over time, the sanitary washing apparatus 20 can be operated while suppressing the effect of this error on the human body. can continue. For example, it is preferable to use temperature sensors with different characteristics to correct the measured value of the temperature sensor that is relatively prone to aging to the measured value of the temperature sensor that is relatively resistant to aging.

Further, the correction unit 203 corrects the measured value of the lower temperature among the first temperature and the second temperature to the measured value of the higher temperature.

As a result, even though the wash water in the hot water storage tank 50 (see FIG. 3) is at a high temperature, it is possible to prevent erroneous recognition that the temperature is lower than the actual temperature. Therefore, it is possible to prevent the washing water from being spouted toward the private parts of the human body, so that the operation of the sanitary washing apparatus can be continued while suppressing the influence on the human body.

Further, the correction unit 203 corrects the measured value immediately before the heater 51 is turned on during execution of the heat retention control, so that the correction is performed immediately before the heater 51 is turned on during the execution of the heat retention control. conduct. Therefore, temperature measurement can be performed in a state where the temperature of the wash water in the hot water storage tank 50 is assumed to be more uniform, and the temperature difference between the first temperature and the second temperature can be determined more accurately. can be done.

Further, here, an example in which correction is performed every time immediately before the heater 51 is turned on by the correction unit 203 has been described. Correction may be performed once a month. This makes it possible to reduce the number of times of processing performed by the correction unit 203, for example.

In this embodiment, the correction unit 203 performs correction based on the temperature difference between the first temperature and the second temperature at one time. may be performed. Thereby, the temperature difference between the first temperature and the second temperature can be determined more accurately.

(Second embodiment)
The correction unit 203 of the sanitary washing device 20 may correct only the second temperature, which is the measured value of the limiter thermistor 102, out of the first temperature and the second temperature. A correction procedure according to the second embodiment will be described with reference to FIG. FIG. 8 is a flowchart showing an example of a correction procedure according to the second embodiment. The correction unit 203 starts correction at the timing just before the heating of the heater 51 (see FIG. 3) is turned on during execution of the heat retention control.

As shown in FIG. 8, the correction unit 203 acquires a first temperature and a second temperature (step S201), calculates the temperature difference between the first temperature and the second temperature (step S202), and sets the second temperature to the second temperature. 1 temperature or less (step S203).

When it is determined in step S203 that the second temperature is lower than the first temperature (step S203, Yes), the correction unit 203 corrects the second temperature to the first temperature (step S204). Specifically, a value obtained by adding the value of the temperature difference calculated in step S202 to the second temperature before correction is set as the second temperature after correction. After that, the process ends.

When determining in step S203 that the second temperature is equal to or higher than the first temperature (step S203, No), the correction unit 203 ends the process.

Here, in step S203, it is determined whether or not the second temperature is lower than the first temperature, and if lower, the second temperature is corrected to the first temperature. Alternatively, the correction unit 203 may determine whether the first temperature is lower than the second temperature in step S203, and correct the first temperature to the second temperature if lower.

In the sanitary washing device 20 according to the second embodiment, for example, by setting in advance so as to correct the measured value of the temperature sensor having the property of not easily deteriorating over time, more reliable correction can be performed. etc. becomes possible.

As described above, in the sanitary washing device 20 according to the first and second embodiments, the second temperature, which is the measured value of the limiter thermistor 102 used for determining whether or not water is being discharged from the nozzle 90 to the private parts of the human body, is lower. If it is, it is recognized that the temperature of the wash water discharged from the nozzle 90 is high by correcting it to the first temperature. Therefore, by correcting at least the second temperature, it is possible to prevent high-temperature wash water from being spouted toward the human body's private parts.

Further, when the first temperature measured by the hot water thermistor 101 used to control the heater 51 is lower than the first temperature, the temperature of the wash water in the hot water storage tank 50 is increased by correcting it to the second temperature. perceive it to be higher. Therefore, by correcting at least the first temperature, further heating of the wash water in the hot water storage tank 50 (see FIG. 3) that has been sufficiently heated and reached the target temperature THc can be suppressed.

As described above, according to the sanitary washing device 20 according to the embodiment, the controller 200 controls the value of at least one of the first temperature and the second temperature based on the temperature difference between the first temperature and the second temperature. and a correction unit 203 for correcting . For this reason, the correcting unit 203 can correct a temperature difference when there is a temperature difference in the measured values of the temperature sensors that are supposed to measure the temperature at the same level with uniformity.

Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the invention are not limited to the specific details and representative embodiments so shown and described. Accordingly, various changes may be made without departing from the spirit or scope of the general inventive concept defined by the appended claims and equivalents thereof.

A Water pipe TR Toilet room 1 Toilet device 10 Toilet bowl 20 Sanitary washing device 30 Water supply path 40 Valve unit 50 Hot water storage tank 51 Heater 60 Electrolytic unit 70 Vacuum breaker 80 Switching valve 85 Nozzle cleaning flow path 90 Nozzle 101 Hot water thermistor 102 Limiter thermistor 200 control unit 201 determination unit 202 heat retention control unit 203 correction unit 250 storage unit THc target temperature W temperature range

Claims (5)

a hot water storage tank for storing wash water;
a nozzle that spouts cleansing water in the hot water storage tank toward the private parts of a human body;
a heater for heating the wash water in the hot water storage tank;
a first temperature sensor and a second temperature sensor that measure the temperature of the wash water in the hot water storage tank;
a control unit that performs heat retention control to bring the temperature of the wash 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
At least one of the first temperature and the second temperature is determined based on a temperature difference between a first temperature measured by the first temperature sensor and a second temperature measured by the second temperature sensor. A sanitary washing device comprising a compensating compensator. The correction unit is
2. The sanitary washing device according to claim 1, wherein the measured value of the lower one of the first temperature and the second temperature is corrected to the measured value of the higher temperature. The control unit
a heat retention control unit that performs the heat retention control to bring the wash water in the hot water storage tank closer to the target temperature by controlling the heater based on the first temperature;
a determination unit that determines whether or not to prohibit water discharge from the nozzle based on the second temperature,
The correction unit is
3. The sanitary washing device according to claim 2, wherein said second temperature is corrected to said first temperature when said second temperature is lower than said first temperature. The correction unit is
The sanitary washing device according to any one of claims 1 to 3, wherein the measured value is corrected immediately before turning on the heater during execution of the heat retention control. a sanitary washing device according to any one of claims 1 to 4;
a toilet on which the sanitary washing device is installed;
A toilet apparatus comprising:

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