JP7115155B2 - sanitary washing equipment - Google Patents

Description

The present disclosure relates to sanitary washing devices.

Conventionally, there has been known a sanitary washing device that discharges warm water to the private parts of the human body. This type of sanitary washing device includes a heater for heating water and a temperature sensor for measuring the temperature of the water heated by the heater.

For example, Patent Document 1 discloses a water inlet thermistor provided upstream of a heater, a hot water thermistor provided downstream of a heat exchanger, and a limiter thermistor provided downstream of the hot water thermistor. A sanitary washing device is disclosed. The incoming water thermistor and the hot water thermistor are used for feedback control of the heat exchanger, and the limiter thermistor is used to ensure that the temperature of the water leaving the heat exchanger is safe for the human body.

JP 2015-227773 A

However, in the above-described conventional technology, the temperature sensor may deteriorate over time due to long-term use of the sanitary washing device (for example, 5 to 10 years). When the temperature sensor deteriorates over time, it may become difficult to appropriately control the temperature of the water discharged to the human body.

The present disclosure provides technology capable of detecting an abnormality in a temperature sensor.

A sanitary washing device according to an aspect of the present disclosure includes a nozzle for discharging water, a water supply channel connected to the nozzle for supplying water to the nozzle, a first temperature sensor for measuring room temperature, and the water supply channel. a second temperature sensor that measures the temperature of flowing water; a third temperature sensor that is arranged downstream of the second temperature sensor in the water supply channel and measures the temperature of water flowing through the water supply channel; and a first reference. a storage unit that stores reference value information that associates a value with a second reference value that is the output value of the third temperature sensor when the output value of the first temperature sensor is the first reference value; When the difference between the output value of the first temperature sensor and the first reference value is equal to or less than the first threshold value, the output value of the third temperature sensor is compared with the second reference value to determine the third temperature. and a control unit that determines abnormality of the third temperature sensor when a difference between the output value of the sensor and the second reference value exceeds a second threshold.

When the temperature environment becomes equal to the temperature environment in the reference value information, the output value of the third temperature sensor is compared with the second reference value in the reference value information. , the abnormality of the third temperature sensor can be accurately determined.

Further, the control unit obtains the output values of the first temperature sensor and the third temperature sensor when the power is supplied after the sanitary washing device is installed, and the obtained first temperature sensor and the third temperature The reference value information is generated using the output values of the sensors as the first reference value and the second reference value, respectively, and is stored in the storage unit.

By generating the reference value information in the environment in which the temperature sensor is actually used in this way, it is possible to accurately perform the abnormality determination process of the temperature sensor.

Further, the control unit obtains the output values of the first temperature sensor and the third temperature sensor after the sanitary washing device is constructed and before water supply to the water supply channel is started, The reference value information is generated using the obtained output values of the first temperature sensor and the third temperature sensor as the first reference value and the second reference value, respectively, and is stored in the storage unit.

In the state after water is passed through the water supply channel, it takes time for the water supply channel to acclimatize to room temperature after water is passed. The reference value information may be generated while the sensor and the third temperature sensor are measuring different temperatures. Therefore, by generating the reference value information before water starts to flow into the water supply channel, the output values of the first temperature sensor and the third temperature sensor that are suitable as the first reference value and the second reference value can be obtained.

Further, the control unit generates the reference value information when an initial operation performed when the power is turned on is performed first after the sanitary washing device is installed.

At the stage of the first initial operation after construction, water has not yet been passed through the water supply channel. , it is considered that sufficient time has passed between the inspection and the construction work, and it is thought that the inspection will not affect the construction work. Therefore, by generating the reference value information at the stage where the initial operation is performed for the first time after construction, the output values of the first temperature sensor and the third temperature sensor that are appropriate as the first reference value and the second reference value can be obtained.

Further, when the control unit determines that the difference between the output value of the first temperature sensor and the first reference value is equal to or less than a first threshold value and that the third temperature sensor is in a state of thermal equilibrium, the The output value of the third temperature sensor is compared with the second reference value.

Abnormality of the third temperature sensor can be accurately determined by comparing the output value of the third temperature sensor with the second reference value when the third temperature sensor is in thermal equilibrium.

According to the present disclosure, an abnormality of a temperature sensor can be detected.

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 of temperature drift. FIG. 4 is a diagram showing an example of reference value information according to the embodiment. FIG. 5 is a flowchart illustrating an example of the procedure of reference value information generation processing according to the embodiment. FIG. 6 is a flowchart illustrating an example of the procedure of abnormality determination processing according to the embodiment. FIG. 7 is a flowchart showing an example of the procedure of reference value information generation processing according to the modification. FIG. 8 is a diagram showing an example of reference value information according to a modification. FIG. 9 is a diagram showing an example of the configuration of a sanitary washing device according to a modification.

EMBODIMENT OF THE INVENTION Below, the form (it describes as "embodiment" hereafter) for implementing the sanitary washing apparatus which concerns on this indication is demonstrated in detail, referring drawings. Note that the sanitary washing device according to the present disclosure is 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 "water" does not necessarily mean cold water, but may be used to mean 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 that cleans with water stored in a water storage tank 11, 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 houses nozzles 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 heat exchanger 50, an electrolytic cell unit 60, a vacuum breaker 70, a switching valve 80, and a nozzle 90. The sanitary washing device 20 also includes an inflow water thermistor 101 , a hot water thermistor 102 , a limiter thermistor 103 and a room temperature thermistor 104 . The sanitary washing device 20 also includes a control section 200 and a storage section 250 .

These water supply path 30, valve unit 40, heat exchanger 50, electrolytic cell unit 60, vacuum breaker 70, switching valve 80, nozzle 90, incoming water thermistor 101, hot water thermistor 102, limiter thermistor 103, room temperature thermistor 104, controller 200 and The storage unit 250 is housed inside the case 23 of the sanitary washing device 20 .

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 water from the water pipe A to the nozzle 90 .

The water supply passage 30 includes, in order from the upstream side (that is, the water pipe A side), a valve unit 40, an inflow water thermistor 101, a heat exchanger 50, a hot water thermistor 102, an electrolytic cell unit 60, a vacuum breaker 70, a limiter thermistor 103, and a switching valve. 80 is provided.

The valve unit 40 opens and closes the water supply passage 30 according to a control signal from the controller 200 . Heat exchanger 50 is, for example, a momentary heat exchanger. The heat exchanger 50 has a heating element, and heats the water flowing through the water supply path 30 to a set temperature while maintaining its flow velocity.

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 the water flowing inside to function the water containing hypochlorous acid. Generates as water.

The vacuum breaker 70 prevents the backflow of water from the nozzle 90 to the heat exchanger 50 and the like by causing the backflowing water to flow to the atmosphere release path (not shown) when negative pressure is generated in the water supply path 30 .

The switching valve 80 is driven according to a control signal from the control unit 200 to switch the outflow destination of the water flowing through the water supply path 30 . For example, the switching valve 80 switches the outflow destination of the water flowing through the water supply path 30 to one of a plurality of outlets provided in the nozzle 90 . Further, the functional water flowing through the water supply channel 30 is switched to the nozzle cleaning channel 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 discharges water flowing through the water supply channel 30 toward the private parts 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 water to the private part of the user at the advanced position to wash the private part.

The inflow water thermistor 101 , the hot water thermistor 102 and the limiter thermistor 103 are temperature sensors that measure the temperature of the water flowing through the water supply passage 30 .

The inflow water thermistor 101 is arranged downstream of the valve unit 40 and upstream of the heat exchanger 50 , and detects water before flowing into the heat exchanger 50 , in other words, before being heated by the heat exchanger 50 . to measure the temperature of the water in the The hot water thermistor 102 is arranged downstream of the heat exchanger 50 and upstream of the electrolytic cell unit 60, and is used to remove the water flowing out of the heat exchanger 50, in other words, the water heated by the heat exchanger 50. Measure the temperature.

The limiter thermistor 103 is arranged downstream of the hot water thermistor 102 . Specifically, the limiter thermistor 103 is arranged downstream of the vacuum breaker 70 and upstream of the switching valve 80, and confirms that the temperature of the water discharged from the nozzle 90 is safe for the human body. used for

On the other hand, room temperature thermistor 104 is a temperature sensor that measures the room temperature of toilet room TR, and is attached to, for example, case 23 outside water supply path 30 .

Output values of inflow water thermistor 101 , hot water thermistor 102 , limiter thermistor 103 and room temperature thermistor 104 are input to control unit 200 . The output values of the inflow water thermistor 101, the hot water thermistor 102, the limiter thermistor 103, and the room temperature thermistor 104 are expressed, for example, by digital values from 0 to 255 (hereinafter referred to as "AD values"). Control unit 200 converts AD values input from water inflow thermistor 101 and the like into temperatures 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 heat exchanger 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.

Based on the output values of the incoming water thermistor 101 and the hot water thermistor 102, the control unit 200 feedback-controls the heat exchanger 50 so that the temperature of the water flowing out of the heat exchanger 50 is within a predetermined range with respect to the set temperature. Specifically, the control unit 200 controls the heat exchanger 50 to perform temperature control processing for increasing or decreasing the amount of heat for heating the water so that the temperature of the water reaches the set temperature.

Also, when the output value of the limiter thermistor 103 is equal to or higher than the threshold, the control unit 200 determines that the temperature of the water flowing out of the heat exchanger 50 exceeds the safe temperature for the human body. In this case, the control unit 200 stops the temperature control process described above so that the water is not heated. Alternatively, the controller 200 may control the valve unit 40 to forcibly stop water discharge when the output value of the limiter thermistor 103 is equal to or greater than the threshold value.

The control unit 200 also controls the temperature of the toilet seat, for example, based on the output value of the room temperature thermistor 104 .

The inflow water thermistor 101, the hot water thermistor 102, the limiter thermistor 103, and the room temperature thermistor 104 may deteriorate over time due to, for example, long-term use of the sanitary washing device 20, resulting in a phenomenon called temperature drift. This point will be described with reference to FIG. FIG. 3 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 water inflow thermistor 101 into a temperature using a conversion table stored in advance, thereby determining the water temperature at each point of the water supply passage 30. are aware of For example, as exemplified in FIG. According to the conversion table, it recognizes that the water temperature at the place where the limiter thermistor 103 is arranged is "45°C".

However, when a temperature drift occurs in the limiter thermistor 103, the limiter thermistor 103 outputs the AD value "80" to the control unit 200 even though the actual water temperature is, for example, 50.degree. In this case, the control unit 200 erroneously recognizes that the temperature of the water at the place where the limiter thermistor 103 is arranged is "45°C" even though the actual water temperature is 50°C. As a result, water of 50° C., which is higher than the set temperature of 45° C., is discharged from the nozzle 90 onto the human body. Although the case where the AD value of limiter thermistor 103 shifts to the high temperature side has been described here, the AD value of limiter thermistor 103 may shift to the low temperature side due to temperature drift.

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.

Therefore, in the sanitary washing device 20 according to the embodiment, the AD value (second reference value) of the limiter thermistor 103 when the AD value of the room temperature thermistor 104 is a certain value (first reference value) is stored in advance. Based on this information, the limiter thermistor 103 is determined to be abnormal.

FIG. 4 is a diagram showing an example of reference value information according to the embodiment. As shown in FIG. 4, the reference value information is information that associates the first reference value and the second reference value. For example, in the example shown in FIG. 4, the second reference value "80" is associated with the first reference value "80".

The first reference value and the second reference value are the AD values of the room temperature thermistor 104 and the limiter thermistor 103 immediately after the sanitary washing device 20 is installed on the toilet bowl 10, specifically, when the electricity is supplied immediately after the installation. That is, the control unit 200 acquires the AD values of the room temperature thermistor 104 and the limiter thermistor 103 immediately after installation of the sanitary washing device 20 and stores them in the storage unit 250 as reference value information.

This point will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of the procedure of reference value information generation processing according to the embodiment.

As shown in FIG. 5, the control unit 200 determines whether or not an initial operation has been performed (step S101). The initial operation is an operation performed when the power plug of sanitary washing device 20 is connected to the power supply. For example, when the sanitary washing device 20 is connected to the power supply, the control unit 200 controls a drive source such as a motor (not shown) as an initial operation to move the nozzle 90 forward and backward relative to the case 23 (see FIG. 1). Let

When it is determined that the initial motion has been performed in step S101 (step S101, Yes), the control unit 200 determines whether or not the initial motion performed this time is the first initial motion after construction (step S102). For example, the control unit 200 counts the number of times the initial motion is performed. Then, when the count number is "1", the control unit 200 determines that the first initial operation after construction has been performed. In addition, the sanitary washing device 20 is not limited to this, and the sanitary washing device 20 must hold information that can identify whether the executed initial motion is the first initial motion after the execution or the second and subsequent initial motions. Just do it.

When it is determined in step S102 that it is the first initial operation after construction (step S102, Yes), the control unit 200 acquires the AD value of the room temperature thermistor 104 (step S103) and acquires the AD value of the limiter thermistor 103. (step S104). Then, control unit 200 generates reference value information in which the obtained AD value of room temperature thermistor 104 and the AD value of limiter thermistor 103 are associated, and stores the reference value information in storage unit 250 (step S105).

As described above, in the sanitary washing device 20 according to the embodiment, the reference value information is generated not at the stage before shipment, but at the stage when the initial operation is performed after construction. . In other words, by generating the reference value information under the environment of actual use, it becomes possible to accurately perform the abnormality determination processing using the reference value information.

Further, in the sanitary washing device 20 according to the embodiment, the reference value information is generated when the executed initial motion is the first initial motion after the execution.

For example, in a pre-shipment stage, there are cases in which an inspection is performed while water is being passed through the water supply channel 30 . In addition, there is a possibility that the second and subsequent initial operations after construction are performed while water is present in the water supply path 30 .

In the state after the water supply passage 30 is supplied with water, it takes time for the water supply passage 30 to acclimate to room temperature after the passage of water. The reference value information may be generated while the room temperature thermistor 104 and the limiter thermistor 103 are measuring different temperatures. In order to avoid this, it is conceivable to wait for the generation of the reference value information until the water supply channel 30 after the water flow has become acclimatized to the room temperature, or to force the water supply channel 30 to acclimatize to the room temperature after the water flow. It is time consuming.

On the other hand, at the stage when the first initial operation was performed after construction, water had not yet been passed through the water supply channel 30, and an inspection involving water flow was conducted prior to shipment, and some residual water was found. Even so, it is considered that sufficient time has passed between the inspection and the construction work, and it is thought that the inspection will not affect the construction work. Therefore, by generating the reference value information when the initial operation is performed for the first time after construction, the AD values of the room temperature thermistor 104 and the limiter thermistor 103 that are appropriate as the first reference value and the second reference value are acquired. can do.

If the initial motion is not performed in step S101 (step S101, No), or if it is not the first initial motion after construction in step S102 (step S102, No), the control unit 200 ends the process.

Next, the content of the limiter thermistor 103 abnormality determination process performed using the reference value information will be described with reference to FIG. FIG. 6 is a flowchart illustrating an example of the procedure of abnormality determination processing according to the embodiment.

As shown in FIG. 6, control unit 200 acquires AD value V1 of room temperature thermistor 104 (step S201) and acquires AD value V2 of limiter thermistor 103 (step S202).

Subsequently, the control unit 200 determines whether or not the absolute value of the difference between the AD value V1 of the room temperature thermistor 104 obtained in step S201 and the first reference value is within the first threshold value (step S203). In this process, if the absolute value of the difference between the first reference value and the AD value V1 is not within the first threshold (step S203, No), the control unit 200 ends the process.

On the other hand, if it is determined in step S203 that the absolute value of the difference between the first reference value and the AD value V1 is within the first threshold value (Yes in step S203), the control unit 200 determines that the limiter thermistor 103 is in thermal equilibrium. It is determined whether or not (step S204).

For example, the controller 200 may determine that the limiter thermistor 103 has reached thermal equilibrium when a predetermined time has elapsed after the heat exchanger 50 stopped heating the water. The predetermined time is a sufficient time for the limiter thermistor 103 to reach thermal equilibrium, and can be obtained by experiments or the like.

By acquiring in advance the time required for the limiter thermistor 103 to reach thermal equilibrium, it is possible to easily determine whether the limiter thermistor 103 has reached the thermal equilibrium. The time until the limiter thermistor 103 reaches thermal equilibrium is, for example, 40 minutes.

Further, when the rate of change of the AD value of the limiter thermistor 103 per unit time falls below the threshold value, that is, when the change in the AD value converges, the control unit 200 determines that the limiter thermistor 103 has reached a thermal equilibrium state. You may As a result, it is possible to accurately determine whether the limiter thermistor 103 has reached a thermal equilibrium state. The rate of change per unit time is, for example, the amount of change of 0.5° C. in 10 minutes.

If the limiter thermistor 103 is not in thermal equilibrium at step S204 (step S204, No), the control unit 200 terminates the process.

On the other hand, if it is determined in step S204 that the limiter thermistor 103 is in a thermal equilibrium state (step S204, Yes), the control unit 200 controls the difference between the AD value V2 of the limiter thermistor 103 acquired in step S202 and the second reference value. is within the second threshold (step S205).

In this process, if it is determined that the absolute value of the difference between the AD value V2 and the second reference value is within the second threshold (step S205, Yes), the control unit 200 determines that the limiter thermistor 103 is normal. (step S206), and the abnormality determination process ends. Note that the control unit 200 may return the process to step S201.

On the other hand, in step S205, when the absolute value of the difference between the AD value V2 and the second reference value exceeds the second threshold (step S205, No), the control unit 200 determines that the limiter thermistor 103 is abnormal. (Step S207), and after executing the abnormality handling process (Step S208), the process is terminated.

For example, as the abnormality handling process, the control unit 200 turns on an LED (Light Emitting Diode) indicator provided in the main unit 21 of the sanitary washing device 20 or an operation unit (not shown) to indicate that an abnormality has occurred in the limiter thermistor 103. The user may be notified of this. Further, the control unit 200 may prohibit the temperature control process by the heat exchanger 50 as the abnormality handling process so that water having a temperature exceeding the set temperature is not discharged to the human body.

As described above, in the sanitary washing device 20 according to the embodiment, when the temperature environment becomes equal to the temperature environment when the reference value information was generated, the AD value of the limiter thermistor 103 is set as the second reference of the reference value information. The limiter thermistor 103 is determined to be abnormal by comparing with the value. As a result, the abnormality of the limiter thermistor 103 can be accurately determined without being influenced by the temperature environment of the toilet room TR in which the sanitary washing device 20 is installed.

Although the room temperature of the toilet room TR fluctuates throughout the year, the timing of the same temperature environment as when the reference value information was generated can occur again in the long term. For example, if the sanitary washing device 20 is installed in the summer of a certain year, there is a high possibility that the temperature environment will be similar in the summer of the next year. Therefore, there is a possibility that a long period of time elapses between execution of abnormality determination processing for the limiter thermistor 103 and execution of the next abnormality determination processing. Good for points.

Here, the reference value information is generated when the initial operation is performed for the first time after construction. , may generate reference value information.

In addition, in Japanese Patent Application Laid-Open No. 2017-133995, two temperature measuring elements (first temperature measuring element, second temperature measuring element) and two conversions for converting the output value of each temperature measuring element into a digital value channels (first conversion channel, second conversion channel), the output value of the first temperature measuring element is input to both the first conversion channel and the second conversion channel, Disclosed is a technique for detecting an abnormality in a first conversion channel or a second conversion channel by comparing a digital value output from the first conversion channel and a digital value output from the second conversion channel. It is However, Japanese Patent Application Laid-Open No. 2017-133995 does not describe anything about detecting an abnormality in the temperature measuring element.

(Modification)
In the above-described embodiment, an example of storing one piece of reference value information has been described, but the storage unit 250 may store a plurality of different pieces of reference value information. By storing a plurality of different reference value information, it is possible to increase the execution frequency of abnormality determination.

FIG. 7 is a flowchart showing an example of the procedure of reference value information generation processing according to the modification. Also, FIG. 8 is a diagram showing an example of reference value information according to a modification.

As shown in FIG. 7, the control unit 200 determines whether or not it is within a predetermined period after construction (step S301). For example, the control unit 200 measures the time after the initial operation is performed for the first time after construction, and if the measured time does not reach a predetermined time (for example, one year), It is determined that it is within a predetermined period after construction.

When it is determined in step S301 that it is within the predetermined period after construction (step S301, Yes), the control unit 200 acquires the AD value of the room temperature thermistor 104 (step S302).

Subsequently, the control unit 200 refers to the reference value information and determines whether or not the AD value acquired in step S302 is an AD value that has not yet been acquired as the first reference value (step S303). For example, when only reference value information in which the first reference value is "80" is stored in storage unit 250, if the AD value of room temperature thermistor 104 obtained in step S302 is "75", control The unit 200 determines that the AD value acquired in step S302 is an AD value that has not yet been acquired as the first reference value.

When it is determined in step S303 that the AD value acquired from the room temperature thermistor 104 is an AD value that has not been acquired as the first reference value (step S303, Yes), the control unit 200 determines whether the limiter thermistor 103 is in thermal equilibrium. It is determined whether or not (step S304). When the controller 200 determines that the limiter thermistor 103 is in thermal equilibrium (step S304, Yes), it acquires the AD value of the limiter thermistor 103 (step S305). Then, the control unit 200 generates reference value information that associates the AD value of the room temperature thermistor 104 acquired in step S302 with the AD value of the limiter thermistor 103 acquired in step S305, and stores the reference value information in the storage unit 250 (step S306).

By doing so, as shown in FIG. 8, a plurality of different reference value information can be generated. Therefore, compared with the case where only one reference value information is stored, the abnormality determination process can be executed with high frequency.

Further, in each of the above-described embodiments, the so-called instant type sanitary washing device without a hot water storage tank has been described as an example, but the present invention is not limited to this, and a so-called hot water storage type sanitary washing device with a hot water storage tank may be used. may Here, a configuration example of a hot water storage type sanitary washing device will be described with reference to FIG. FIG. 9 is a diagram showing an example of the configuration of a sanitary washing device according to a modification.

As shown in FIG. 9, the sanitary washing device 20A according to the modification includes a hot water storage tank 55 that stores water flowing through the water supply path 30 instead of the heat exchanger 50 (see FIG. 2). The hot water storage tank 55 is arranged downstream of the inflow thermistor 101 and upstream of the electrolytic cell unit 60 . A heater 56 and a hot water thermistor 102 are arranged inside the hot water storage tank 55 . Heater 56 heats the water stored in hot water storage tank 55 under the control of control unit 200 .

The control unit 200 of the sanitary washing device 20A performs the same temperature control process on the heater 56 as the temperature control process on the heat exchanger 50 .

As described above, the sanitary washing devices 20 and 20A according to the embodiments include the nozzle 90 for discharging water, the water supply path 30 connected to the nozzle 90 for supplying water to the nozzle 90, and the first water supply for measuring the room temperature. A temperature sensor (for example, room temperature thermistor 104), a second temperature sensor (for example, hot water thermistor 102) that measures the temperature of water flowing through water supply path 30, and a temperature sensor downstream of the second temperature sensor in water supply path 30 A third temperature sensor (limiter thermistor 103 as an example) arranged to measure the temperature of water flowing through the water supply passage 30, a first reference value, and when the output value of the first temperature sensor is the first reference value A storage unit 250 that stores reference value information associated with a second reference value, which is the output value of the third temperature sensor, and a difference between the output value of the first temperature sensor and the first reference value is equal to or less than the first threshold. When the output value of the third temperature sensor and the second reference value are compared, and if the difference between the output value of the third temperature sensor and the second reference value exceeds the second threshold, the third temperature sensor and a control unit 200 for determining an abnormality of

When the temperature environment becomes equal to the temperature environment in the reference value information, the output value of the third temperature sensor is compared with the second reference value in the reference value information. , the abnormality of the third temperature sensor can be accurately determined.

In addition, the control unit 200 acquires the output values of the first temperature sensor and the third temperature sensor when the power is supplied after the sanitary washing apparatuses 20 and 20A are installed, and the output values of the acquired first temperature sensor and the third temperature sensor are obtained. Reference value information having the output values as the first reference value and the second reference value is generated and stored in the storage unit 250 .

By generating the reference value information in the environment in which the temperature sensor is actually used in this way, it is possible to accurately perform the abnormality determination process of the temperature sensor.

Further, the control unit 200 obtains the output values of the first temperature sensor and the third temperature sensor after the sanitary washing devices 20 and 20A are installed and before the water supply passage 30 starts to flow, Reference value information is generated using the obtained output values of the first temperature sensor and the third temperature sensor as the first reference value and the second reference value, respectively, and is stored in the storage unit.

In the state after the water supply passage 30 is supplied with water, it takes time for the water supply passage 30 to acclimate to room temperature after the passage of water. The reference value information may be generated while the first temperature sensor and the third temperature sensor are measuring different temperatures. Therefore, by generating the reference value information before water starts to flow through the water supply passage 30, the output of the first temperature sensor and the third temperature sensor suitable as the first reference value and the second reference value value can be obtained.

Further, the control unit 200 generates the reference value information when the initial operation executed when the power is turned on is executed for the first time after the sanitary washing devices 20 and 20A are installed.

At the stage where the first initial operation after construction is performed, water has not yet been passed through the water supply channel 30, and it is assumed that there is some residual water after an inspection involving water flow is performed before shipping. However, it is considered that sufficient time has passed between the inspection and the construction work, and it is thought that the inspection will not affect the construction work. Therefore, by generating the reference value information at the stage where the initial operation is performed for the first time after construction, the output values of the first temperature sensor and the third temperature sensor that are appropriate as the first reference value and the second reference value can be obtained.

Further, when the control unit 200 determines that the difference between the output value of the first temperature sensor and the first reference value is equal to or less than the first threshold value and that the third temperature sensor is in a state of thermal equilibrium, the third temperature sensor and the second reference value.

Abnormality of the third temperature sensor can be accurately determined by comparing the output value of the third temperature sensor with the second reference value when the third temperature sensor is in thermal equilibrium.

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 Heat exchanger 60 Electrolyzer unit 70 Vacuum breaker 80 Switching valve 85 Nozzle cleaning flow path 90 Nozzle 101 Inlet water thermistor 102 Hot water thermistor 103 Limiter thermistor 104 Room temperature thermistor 200 Control unit 250 Storage unit

Claims (5)

a nozzle for ejecting water;
a water supply channel connected to the nozzle and supplying water to the nozzle;
a first temperature sensor that measures room temperature;
a second temperature sensor that measures the temperature of water flowing through the water supply channel;
a third temperature sensor arranged downstream of the second temperature sensor in the water supply passage and measuring the temperature of water flowing through the water supply passage;
A storage unit that stores reference value information that associates a first reference value with a second reference value that is the output value of the third temperature sensor when the output value of the first temperature sensor is the first reference value. When,
When the difference between the output value of the first temperature sensor and the first reference value is equal to or less than the first threshold value, the output value of the third temperature sensor is compared with the second reference value, and the third A sanitary washing device, comprising: a control unit that determines abnormality of the third temperature sensor when a difference between an output value of the temperature sensor and the second reference value exceeds a second threshold value. The control unit
When the sanitary washing device is energized after construction, the output values of the first temperature sensor and the third temperature sensor are obtained, and the obtained output values of the first temperature sensor and the third temperature sensor are converted to the 2. The sanitary washing device according to claim 1, wherein the reference value information as the first reference value and the second reference value is generated and stored in the storage unit. The control unit
After constructing the sanitary washing device and before water supply to the water supply channel is started, the output values of the first temperature sensor and the third temperature sensor are acquired, and the acquired first temperature sensor 2. The sanitary washing apparatus according to claim 1, wherein said reference value information is generated and stored in said storage unit, with the output values of said third temperature sensor and said third temperature sensor being said first reference value and said second reference value, respectively. The control unit
4. The sanitary washing device according to claim 3, wherein the reference value information is generated when an initial operation executed when the power is turned on is executed for the first time after the sanitary washing device is installed. The control unit
The output value of the third temperature sensor when the difference between the output value of the first temperature sensor and the first reference value is equal to or less than a first threshold value and the third temperature sensor is determined to be in thermal equilibrium. and said second reference value.

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