JP2022007271A - Water closet device - Google Patents

Abstract

To provide a water closet device that can accurately detect a water level in a washing water tank by suppressing effects of rippling on a surface, dew condensation and water droplets of washing water in the washing water tank, and can increase a degree of freedom in layout in the washing water tank.SOLUTION: The water closet device according to an embodiment comprises a toilet bowl body, a washing water tank, a water supply device, a water level sensor, a control device, a sensor holding part and a wall part. The washing water tank stores washing water for washing the toilet bowl body. The water supply device supplies the washing water into the washing water tank. The water level sensor is disposed in the washing water tank and is of a capacitance type, and measures capacitance to detect the water level in the washing water tank. The control device controls the water supply device based on a detection result of the water level sensor. The sensor holding part is provided in the washing water tank and extends in a vertical direction to hold the water level sensor. The wall part is provided outside an outer peripheral surface of the washing water tank while having a gap between the wall part and the outer peripheral surface of the sensor holding part.SELECTED DRAWING: Figure 5

Description

The disclosed embodiment relates to a flush toilet bowl device.

Conventionally, there is a water washing urinal device that uses a capacitance type water level sensor that can measure the capacitance and detect the water level in the water level sensor that detects the water level in the washing water tank that stores the washing water (for example, patent). See Document 1).

In this way, when a capacitance type water level sensor is used, for example, the influence of water quality on the site where the chlorine concentration is low or where reclaimed water is used is smaller than that of a mechanical water level sensor such as a float sensor. In addition, unlike the float sensor, malfunctions such as the float sticking to the shaft due to the biofilm (slimy) and not operating do not occur.

JP-A-2018-179858

By the way, in the case of the capacitance type water level sensor, the influence of dirt due to water quality is small, but when used in a high humidity environment such as in a washing water tank, for example, dew condensation or water droplets during water supply will be near the water level sensor. It may adhere and the water level sensor may detect (ie, falsely detect) dew condensation or water droplets as a rise in water level.

For this reason, it is conceivable to prevent the water level sensor from being affected by dew condensation or water droplets, for example, by arranging a capacitance type water level sensor in the small tank in the washing water tank.

However, even when the capacitance type water level sensor is arranged in a small tank, for example, if the water level sensor is installed near the water supply device that supplies the washing water into the washing water tank, the washing water tank is supplied at the time of water supply. The change in the water level may be disturbed due to the surface of the washing water inside being rippling, or the washing water in the washing water tank being mixed with foaming bubbles or foreign matter, which may cause false detection. rice field.

In addition, since it is necessary to install the water level sensor in the washing water tank while avoiding the vicinity of the water supply device, the degree of freedom in layout in the washing water tank is low.

One aspect of the embodiment is to suppress the influence of ripples, dew condensation and water droplets on the water surface of the washing water in the washing water tank, enable accurate detection of the water level in the washing water tank, and layout in the washing water tank. It is an object of the present invention to provide a water-washing urinal device that can increase the degree of freedom.

The water-washing toilet device according to one embodiment includes a toilet body, a washing water tank for storing washing water for washing the toilet body, a water supply device for supplying washing water into the washing water tank, and the washing. A capacitive water level sensor that is placed in the water tank and measures the capacitance to detect the water level in the wash water tank, and a control device that controls the water supply device based on the detection result of the water level sensor. And, while having a gap between the sensor holding portion arranged in the washing water tank and extending in the vertical direction for holding the water level sensor and the outer peripheral surface of the sensor holding portion in the washing water tank. It includes a wall portion arranged on the outside of the outer peripheral surface.

According to such a configuration, the wall portion is arranged on the outside of the outer peripheral surface while having a gap between the outer peripheral surface of the sensor holding portion that holds the water level sensor, and the water level in the washing water tank rises. When the wash water enters the void, the water level of the wash water that has entered the void also rises in conjunction with the rise of the water level in the wash water tank, so that the water level in the wash water tank can be detected. In this case, the rectifying effect in the void can suppress chattering due to the rippling of the water surface of the washing water in the void. This enables accurate detection of the water level in the washing water tank. Further, the wall portion can suppress the influence of dew condensation and water droplets on the outer peripheral surface of the sensor holding portion during water supply. Therefore, it is possible to accurately detect the water level in the washing water tank, and the water level sensor and the sensor holding portion can be freely arranged in the washing water tank without considering avoiding dew condensation and water splashes. be able to. That is, it is possible to increase the degree of freedom in the layout of the water level sensor and the sensor holding portion in the washing water tank.

Also, for example, it is not necessary to form a large space around the water level sensor to generate a sudden water level change so that the capacitive water level sensor can accurately detect the water level in the washing water tank. , The washing water tank can be easily miniaturized.

Further, in the above-mentioned flush toilet device, the sensor holding portion is covered with the wall portion so that the lower end portion thereof does not protrude from the lower end portion of the wall portion.

According to such a configuration, the outer peripheral surface of the sensor holding portion is completely covered with the wall portion, so that foreign matter mixed in the washing water in the washing water tank adheres to the outer peripheral surface of the sensor holding portion. Or, it is possible to suppress the influence of the water level sensor due to the wavy surface of the washing water in the washing water tank. This makes it possible to suppress erroneous detection of the water level in the washing water tank.

Further, in the above-mentioned flush toilet device, a filter member provided at the lower end portion of the wall portion and for stopping foreign matter at the lower end portion of the wall portion is further provided.

According to such a configuration, it is possible to prevent foreign matter from being mixed into the voids by the filter member. As a result, foreign matter is clogged in the void and the water level in the void is prevented from rising, so that the water level sensor can prevent the water level from being erroneously detected or becoming undetectable and causing poor water stoppage. can. In addition, since the filter member is located at the lower end of the wall that serves as the inlet or outlet of the washing water, it is possible to prevent foreign matter from entering at one place, and it is possible to prevent foreign matter from entering efficiently and easily. can do.

Further, in the above-mentioned flush toilet device, the void is formed in the entire circumferential direction on the outer peripheral surface of the sensor holding portion.

According to such a configuration, the entire circumferential direction on the outer peripheral surface of the sensor holding portion, that is, the entire circumferential direction of the water level sensor can be filled with the washing water for which the capacitance is to be measured. The amount of change in the value can be increased, and the water level can be detected with high measurement sensitivity.

Further, in the above-mentioned flush toilet device, the sensor holding portion has a rectangular shape having a longitudinal direction and a lateral direction.

With such a configuration, it is possible to form a wide void while reducing the thickness of the side wall of the sensor holding portion, so that the amount of change in the capacitance value can be increased and the water level can be raised with high measurement sensitivity. Can be detected.

Further, in the above-mentioned flush toilet device, the distance between the outer peripheral surface of the sensor holding portion and the inner peripheral surface of the wall portion is substantially constant.

According to such a configuration, since the void has a substantially constant width in the horizontal direction, it is possible to suppress the bias of the washing water flowing into or out of the void. As a result, it is possible to suppress the measurement error of the capacitance by the water level sensor.

According to one aspect of the embodiment, it is possible to accurately detect the water level in the washing water tank by suppressing the influence of ripples, dew condensation and water droplets on the water surface of the washing water in the washing water tank, and in the washing water tank. The degree of freedom in layout can be increased.

FIG. 1 is a cross-sectional view showing an example of a flush toilet bowl device according to an embodiment. FIG. 2 is a plan view showing an example of the flush toilet bowl device according to the embodiment. FIG. 3 is a cross-sectional view showing a washing water tank device. FIG. 4 is a block diagram showing an example of a control system related to water level detection control. FIG. 5 is a schematic cross-sectional view of the water level sensor unit. FIG. 6 is a schematic bottom view of the water level sensor unit. FIG. 7 is an explanatory view of the water surface of the washing water in the void. FIG. 8 is an explanatory diagram of a modified example of the wall portion. FIG. 9 is a schematic cross-sectional view of a modified example of the water level sensor unit.

Hereinafter, embodiments of the flush toilet bowl device disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments shown below.

<Overview of flush toilet device>
The outline of the flush toilet device 1 according to the embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional (side cross-sectional) view showing an example of the flush toilet device 1 according to the embodiment. FIG. 2 is a plan view showing an example of the flush toilet device 1 according to the embodiment. In addition, in FIGS. 1 and 2, the lid of the washing water tank device 33 and the like are omitted. The water-washing toilet device 1 according to the embodiment discharges filth by washing with washing water.

Further, in each figure, for convenience of explanation, a three-dimensional Cartesian coordinate system including a Z-axis whose positive direction is vertically upward may be shown. In this case, the positive side surface of the X axis is defined as the left side surface, the negative side surface of the X axis is defined as the right side surface, the positive side surface of the Y axis is defined as the front surface, and the negative side surface of the Y axis is defined as the back surface. is doing. Therefore, in the following, the X-axis direction may be referred to as the left-right direction, the Y-axis direction may be referred to as the front-back direction, and the Z-axis direction may be referred to as the up-down direction.

As shown in FIGS. 1 and 2, the flush toilet device 1 includes a Western-style toilet (hereinafter referred to as a toilet) 2 and a cleaning unit 3. The toilet bowl 2 includes a toilet bowl main body 21, a toilet lid (not shown), and a toilet seat (not shown). The toilet bowl body 21 is made of pottery, for example. The toilet bowl body 21 may be made of resin, or may be a combination of pottery and resin. Further, the toilet body 21 is a floor-standing type in the illustrated example, but may be a wall-mounted type.

The toilet body 21 includes a bowl portion 22, a rim portion 23, a headrace 24, a first spout 25, a water reservoir 26, and a trap pipe 27. The bowl portion 22 serves as a receiving surface for receiving filth. The rim portion 23 is formed on the upper edge of the bowl portion 22. As shown in FIG. 2, the rim portion 23 overhangs toward the inside, which is the center side of the bowl portion 22 in a plan view.

The headrace 24 is formed behind the bowl portion 22. The washing water supplied from the washing water tank device 33, which will be described later, flows through the headrace 24. The first spout 25 is formed on the upper left side of the bowl portion 22. The first spout 25 discharges the washing water flowing through the headrace 24. The washing water discharged from the first water discharge port 25 is swirled to wash the bowl portion 22.

The water reservoir portion 26 is formed below the bowl portion 22. As shown in FIG. 1, water (washing water) is accumulated in the water reservoir 26. The trap pipeline 27 is formed below the water reservoir portion 26. In the trap pipeline 27, the inlet 27a is arranged below the water reservoir 26, and the outlet 27b is arranged behind the inlet 27a. The outlet 27b of the trap line 27 is connected to an underfloor drainage pipe (not shown) via a drainage socket (not shown).

As shown in FIG. 1, the toilet body 21 further includes a second spout 28. The second water spout 28 is formed behind and above the water reservoir 26. At the second spout 28, the washing water flowing through the headrace 24 is branched in the middle, and the branched washing water is discharged. The washing water discharged from the second water discharge port 28 generates a swirling flow that swirls the water in the water reservoir 26 in the vertical direction.

The toilet lid is provided above the toilet body 21. The toilet lid can swing in the vertical direction, for example, about a swing shaft (not shown) arranged in the cleaning unit 3 arranged at the rear on the upper surface of the toilet body 21. The toilet bowl 2 does not have to be provided with a toilet lid. The toilet seat is provided between the toilet body 21 and the toilet lid. Like the toilet lid, the toilet seat can swing in the vertical direction around the swing axis.

The cleaning unit 3 includes a casing plate 31, a local cleaning device 32, and a cleaning water tank device 33. The casing plate 31 is arranged at the rear part on the upper surface of the toilet bowl main body 21. The casing plate 31 serves as the base of the cleaning unit 3. A casing cover (not shown) is attached to the casing plate 31 from above.

The local cleaning device 32 is located at the front on the casing plate 31. The local cleaning device 32 includes a nozzle 321. The nozzle 321 ejects wash water toward a local part of the human body. The local cleaning device 32 cleans the local area of the user seated on the toilet seat by ejecting cleaning water from the nozzle 321.

The wash water tank device 33 is located at the rear on the casing plate 31. The washing water tank device 33 stores the washing water to be supplied to the bowl portion 22 of the toilet bowl main body 21. The wash water tank device 33 is a so-called low silhouette tank configured to have a relatively low height.

<Washing water tank device>
Next, the washing water tank device 33 will be described with reference to FIG. FIG. 3 is a cross-sectional view showing the washing water tank device 33, and more specifically, is a cross-sectional view taken along the line AA in FIG. As shown in FIG. 3, the washing water tank device 33 includes a washing water tank 34, a water supply device 35, a drain valve device 36, a water level sensor unit 37, and a control device 38 (see FIG. 2).

The wash water tank 34 stores wash water. The wash water tank 34 is, for example, a box-shaped tank and includes a drain port 341 formed at the bottom. The drain port 341 communicates with the headrace 24 (see FIG. 1) of the toilet bowl main body 21 and supplies the wash water in the washwater tank 34 to the headrace 24. A lid portion 342 that covers the upper opening is attached to the wash water tank 34.

The water supply device 35 is arranged above the wash water tank 34. The water supply device 35 supplies wash water into the wash water tank 34 from a water supply source such as tap water. The water supply device 35 includes a water supply pipe 351, a water supply valve 352, and a water discharge port 353. The water supply pipe 351 extends from an external water supply source to the water supply device 35. The water supply pipe 351 supplies wash water at a predetermined water supply pressure. The water supply valve 352 is provided at the upper end of the water supply pipe 351.

The water supply valve 352 switches between discharging and stopping the washing water supplied from the water supply pipe 351. The water discharge port 353 is arranged on the downstream side of the water supply valve 352. When the water supply valve 352 is switched to the water discharge side, the water discharge port 353 discharges wash water into the wash water tank 34.

The water supply device 35 discharges washing water having a predetermined amount of flow rate per unit time into the washing water tank 34 from the water discharge port 353. The water supply flow rate per unit time of the washing water by the water supply device 35 is, for example, 4 L / min to 10 L / min. In this case, the rate of increase of the water level in the washing water tank 34 is 1 mm / sec to 4 mm / sec, preferably 2 mm / sec, for example.

The drain valve device 36 opens the drain port 341 to discharge the wash water stored in the wash water tank 34. The drain valve device 36 stores the wash water in the wash water tank 34 by closing the drain port 341. The drain valve device 36 includes an overflow pipe 361 and a drain valve 362 (both see FIGS. 1 and 2).

The overflow pipe 361 extends in the vertical direction. The lower part of the overflow pipe 361 communicates with the drain port 341. In the overflow pipe 361, when the water level in the washing water tank 34 rises above the full water level LW1 and reaches the upper end opening 361a (see FIGS. 1 and 2) of the overflow pipe 361, the washing water flowing in from the upper end opening 361a flows. It is discharged from the drain port 341 to the headrace 24 (see FIG. 1) of the toilet bowl main body 21. The drain valve 362 is provided at the lower end of the overflow pipe 361.

When the user operates the operation switch provided on the wall or the like to perform the toilet bowl cleaning in a predetermined cleaning mode such as large cleaning or small cleaning, the drive device 363 (see FIG. 2) is driven to drain water. The wash water in the wash water tank 34 is discharged to the headrace 24 until the drain valve 362 is lowered and the drain port 341 is closed after a predetermined time has elapsed after the valve 362 is raised and the drain port 341 is opened.

The water level sensor unit 37 is arranged at the upper part in the washing water tank 34. The water level sensor unit 37 detects the water level in the washing water tank 34. The water level sensor unit 37 transmits a capacitance value corresponding to the water level in the washing water tank 34 by the water level sensor 371 described later. The details of the water level sensor unit 37 will be described later with reference to FIG.

The control device 38 controls the water supply device 35 based on the detection result of the water level sensor 371, for example, by closing the water supply valve 352 of the water supply device 35 to stop the supply of the washing water. The control device 38 acquires the capacitance value transmitted from the water level sensor 371.

Further, the control device 38 can electrically control the electronic components included in the local cleaning device 32 and the cleaning water tank device 33. The control device 38 includes, for example, a local cleaning device 32, a water supply valve 352 of the water supply device 35, a water level sensor 371, a drive device 363 of the drain valve device 36, an operation switch for starting and stopping an operation for performing various operations, and the like. It is electrically connected to and can send and receive command signals necessary for operating each device.

The control device 38 controls to open the water supply valve 352 of the water supply device 35 to start the supply of the wash water immediately after the discharge of the wash water is started with the start of the toilet bowl wash. Further, when the control device 38 detects, for example, a drop from the full water level WL _MAX in which the water level in the washing water tank 34 is set to a predetermined height by the water level sensor 371, the control device 38 supplies the washing water by the water supply device 35. It may be controlled to start.

Further, when the user operates an operation switch or the like provided on the wall or the like, the control device 38 receives a cleaning start signal or the like transmitted from the operation switch or the like and executes the toilet bowl cleaning in a predetermined cleaning mode. Although the control device 38 is provided on the local cleaning device 32 side in the examples shown in FIGS. 1 and 2, for example, the control device 38 may be provided on the outside of the cleaning water tank 34 on the cleaning water tank device 33 side. ..

As shown in FIG. 3, the washing water tank device 33 may further include a float unit 40 for power failure. The float unit 40 for a power failure stops the water supply operation of the water supply device 35 in the event of a power failure.

<Control system for water level detection control>
Next, the water level detection control in the flush toilet device 1 (see FIG. 1) according to the embodiment will be described with reference to FIG. FIG. 4 is a block diagram showing an example of a control system related to water level detection control.

As shown in FIG. 4, in the control system related to the water level detection control centered on the control device 38, the control device 38 performs the water level detection control based on the capacitance value transmitted from the water level sensor 371. The water level sensor 371 includes an electrode unit 373 and a measurement unit 374. The control device 38 includes an acquisition unit 381, a processing unit 382, a storage unit 383, a determination unit 384, and an instruction unit 385.

The water level sensor 371 measures the capacitance of the electrode unit 373, which fluctuates depending on the distance to the washing water, by the measuring unit 374, and the measuring unit 374 generates measurement data (capacitance value) indicating the capacitance. The water level sensor 371 transmits the measurement data to the control device 38.

The control device 38 receives the measurement data transmitted from the water level sensor 371 at the acquisition unit 381. The control device 38 calculates and processes the measurement data acquired by the acquisition unit 381 in the processing unit 382, stores it in the storage unit 383, and determines each item from the calculation result in the determination unit 384. The determination unit 384 determines, for example, the supply of wash water, the stop of the supply of wash water, water leakage in a steady state (when full), poor drainage during washing, and the like.

Further, the control device 38 transmits each instruction signal from the instruction unit 385 according to the determination result of the determination unit 384. In the example shown in FIG. 4, the control device 38 controls, for example, the supply or stop supply of the washing water by the water supply device 35.

The control device 38 determines that the water level is full based on the measurement data acquired from the water level sensor 371. In this case, the control device 38 determines whether or not the water level of the washing water has risen to the full water level WL _MAX (see FIG. 3) based on the absolute value of the capacitance value calculated and processed by the processing unit 382. Judgment by 384.

Further, the control device 38 determines that water leakage occurs when the absolute value of the capacitance value at the time of full water is less than a preset threshold value. In this case, the control device 38 determines in the determination unit 384 whether or not the absolute value of the capacitance value calculated by the processing unit 382 is below the threshold value, and if it is below the threshold value, it is determined that water leakage occurs.

Here, the control device 38 controls to supply the washing water by the water supply device 35 when it is determined that the water leaks. In this case, the control device 38 transmits a water supply signal from the instruction unit 385 to the water supply device 35.

Further, the control device 38 determines the time of washing based on the measurement data (capacitance value) after a predetermined time has elapsed from the drop of the water level of the washing water. In this case, the control device 38 is based on the relative value of the capacitance value calculated by the processing unit 382, that is, the relative value of the capacitance value calculated by the processing unit 382 is a predetermined amount or more by the determination unit 384. It is determined whether or not it has changed (decreased), and if it has changed, it is determined that it is at the time of cleaning.

Further, the control device 38 determines that the drainage is defective when the absolute value of the capacitance value at the time of cleaning the toilet bowl is not lower than the absolute value of the capacitance value at the time of full water. In this case, the control device 38 determines whether or not the absolute value of the capacitance value calculated by the processing unit 382 is lower than the absolute value of the capacitance value at the time of full water stored in the storage unit 383. Judgment is made by the determination unit 384, and if it is not lowered, it is determined that the drainage is defective.

Further, the control device 38 determines that the washing is completed when the water level of the washing water reaches the water stop water level WL _MIN (see FIG. 3). Then, after the cleaning of the toilet bowl is completed, the control device 38 determines that the toilet is full based on the measurement data (capacitance value) from the water level sensor 371. In this case, the control device 38 determines whether or not the capacitance value calculated by the processing unit 382 is relatively higher than the capacitance value at the time of cleaning stored in the storage unit 383 and exceeds the threshold value. Judgment is made by the determination unit 384, and if the capacitance value is higher than the capacitance value at the time of cleaning and exceeds the threshold value, it is determined that the water is full.

As described above, by using the capacitance type water level sensor 371, it is possible to detect water leakage in the steady state (when the water is full) based on the capacitance value. In addition, based on the capacitance value, it is possible to deal with water leakage in the steady state (when the water is full). In addition, it is possible to detect poor drainage during cleaning based on the capacitance value.

Further, based on the capacitance value, it is possible to suppress erroneous detection of full water due to water supply after cleaning is completed. Specifically, since there are a plurality (two) of determination conditions based on the capacitance value by the determination unit 343, erroneous detection can be suppressed.

In the present embodiment, the determination after the cleaning is completed is performed by reaching the water stop water level WL _MIN , but for example, the cleaning completion may be determined based on the time from the start of the cleaning. In this case, the control device 38 determines, for example, whether or not a predetermined time has elapsed from the start of cleaning by the determination unit 384, and if it has elapsed, it determines that the cleaning is completed.

<Water level sensor unit>
Next, the water level sensor unit 37 will be described with reference to FIGS. 5 and 6. FIG. 5 is a schematic cross-sectional view of the water level sensor unit 37. FIG. 6 is a schematic bottom view of the water level sensor unit 37. As shown in FIGS. 5 and 6, the water level sensor unit 37 is arranged in the washing water tank 34 and includes a water level sensor 371 and a sensor holding portion 375.

The water level sensor 371 is a capacitance type water level sensor, and measures the capacitance to detect the water level in the washing water tank 34. The water level sensor 371 is electrically connected to the control device 38 (see FIG. 1) via wiring (not shown) or the like. The water level sensor 371 includes a sensing unit 372 extending in the vertical direction. As described above, the sensing unit 372 includes an electrode unit 373 and a measuring unit 374 (both refer to FIG. 4). The sensing unit 372 measures the capacitance in the electrode unit 373 with the measuring unit 374, and generates measurement data indicating the measured value (capacitance value).

The sensing unit 372 may include, for example, an arithmetic processing unit, and the arithmetic processing unit may generate water level data indicating the water level based on the capacitance value. The arithmetic processing unit may be configured by hardware such as FPGA (Field Programmable Gate Array) or ASIC (Application Specified Integrated Circuit), or may be configured by arithmetic processing circuits such as CPU (Central Processing Unit) and a program. May be done.

The arithmetic processing unit may be integrated (one-chip) so as to be integrated with the measurement unit 374.

The sensing unit 372 is, for example, cylindrical. The sensing unit 372 is not limited to a columnar shape, but may be a rectangular columnar shape or the like. Further, the sensing portion 372 preferably has a tapered shape in which the diameter on the lower end (tip) 372a side is smaller than the diameter on the upper end (base end) side. In the present embodiment, the sensing portion 372 has a conical tip.

The sensor holding unit 375 holds the water level sensor 371 inside. The sensor holding portion 375 is made of resin, for example, and is formed in an outer shape extending in the vertical direction. The sensor holding portion 375 includes a main body portion 376, a base portion 377, and a wall portion 378. The main body 376 holds the water level sensor 371. As shown in FIG. 6, the main body portion 376 has a rectangular shape having a longitudinal direction and a lateral direction. Therefore, the main body portion 376 has a rectangular tubular shape.

As described above, since the main body portion 376 of the sensor holding portion 375 has a rectangular shape having a longitudinal direction and a lateral direction, the gap S can be formed widely while reducing the thickness of the side wall of the main body portion 376. Therefore, the amount of change in the capacitance value can be increased, and the water level can be detected with high measurement sensitivity.

The base 377 is, for example, flat and has a hole 377a through which a mounting screw 50 or the like is inserted when the water level sensor unit 37 is mounted at a desired position in the washing water tank 34.

The wall portion 378 is arranged outside the outer peripheral surface of the main body portion 376 while having a gap S between the wall portion 378 and the outer peripheral surface of the main body portion 376. The wall portion 378 has, for example, an elliptical tubular shape and is provided so as to cover the main body portion 376. In this case, the lower end of the main body 376 does not protrude downward from the lower end of the wall 378.

The gap S between the main body portion 376 and the wall portion 378 is formed on the entire peripheral surface of the main body portion 376 in the circumferential direction. Further, the distance L between the outer peripheral surface of the main body portion 376 and the inner peripheral surface of the wall portion 378 facing each other and forming the void S is substantially constant at any position in the vertical direction. The wall portion 378 may have a vent on the upper portion thereof, for example, for venting air from the void S.

As described above, since the entire circumferential direction on the outer peripheral surface of the main body portion 376 of the sensor holding portion 375, that is, the entire circumferential direction of the water level sensor 371 can be filled with the washing water to be measured for the capacitance, it is static. The amount of change in the capacitance value can be increased, and the water level can be detected with high measurement sensitivity.

Further, since the distance between the outer peripheral surface of the main body portion 376 of the sensor holding portion 375 and the inner peripheral surface of the wall portion 378 is substantially constant, the gap S has a substantially constant width in the horizontal direction. It is possible to suppress the bias of the washing water W flowing in or out. As a result, it is possible to suppress the measurement error of the capacitance by the water level sensor 371.

According to the water-washing urinal device 1 according to the embodiment described above, the outer peripheral surface of the main body portion 376 has a gap S between the outer peripheral surface of the main body portion 376 of the sensor holding portion 375 holding the water level sensor 371. When the washing water W enters the void S due to the rise in the water level in the washing water tank 34, the water level of the washing water W that has entered the void S also enters the washing water tank 34. Since the water level rises in conjunction with the rise of the water level, it is possible to detect the water level in the washing water tank 34.

In this case, as shown in FIG. 7, chattering due to rippling of the water surface WS of the washing water W in the void S can be suppressed by the rectifying effect in the void S. This enables accurate detection of the water level in the washing water tank 34 (see FIG. 3). Further, the wall portion 378 can suppress the influence of dew condensation and water droplets at the time of water supply on the outer peripheral surface of the main body portion 376 of the sensor holding portion 375. Therefore, the water level in the washing water tank 34 can be accurately detected, and the water level sensor unit 37 can be freely arranged in the washing water tank 34 without considering avoiding dew condensation and water droplets. be able to. That is, the degree of freedom in the layout of the water level sensor unit 37 in the washing water tank 34 can be increased.

Further, for example, it is necessary to form a wide space around the water level sensor 371 to generate a sudden water level change so that the electrostatic capacity type water level sensor 371 can accurately detect the water level in the washing water tank 34. Therefore, the washing water tank 34 can be easily miniaturized.

Further, since the outer peripheral surface of the main body portion 376 of the sensor holding portion 375 is completely covered by the wall portion 378, foreign matter mixed in the washing water W in the washing water tank 34 may adhere to the outer peripheral surface of the main body portion 376. It is possible to prevent the water level sensor 371 from being affected by the waviness of the water surface WS of the washing water W in the washing water tank 34. This makes it possible to suppress erroneous detection of the water level in the washing water tank 34.

FIG. 8 is an explanatory diagram of a modified example of the void S. 8 (a) to 8 (c) schematically show a state in which the void S is viewed from above. Since the void S does not have to be affected by chattering due to the ripple of the water surface WS of the washing water W while interlocking with the water level in the washing water tank 34 (see FIG. 3), the gap S does not necessarily have to be the outer periphery of the main body portion 376 of the sensor holding portion 375. It does not have to be formed facing all faces of the face.

Therefore, as shown in FIG. 8A, the void S may be formed so as to face three of the outer peripheral surfaces of the main body portion 376, or as shown in FIG. 8B. , It may be formed so as to face a part of the outer peripheral surface of the main body portion 376, or it may be formed so as to face the outer peripheral surface of the main body portion 376 as shown in FIG. 8 (c).

<Modification example of water level sensor unit>
Next, a modified example of the water level sensor unit 37 (water level sensor unit 37A) will be described with reference to FIG. FIG. 9 is a schematic cross-sectional view of a modified example of the water level sensor unit 37 (water level sensor unit 37A). The water level sensor unit 37A shown in FIG. 9 has a different configuration from the water level sensor unit 37 described above in that it includes a filter member 379, and has the same other configurations. Therefore, the same reference numerals are given to the same parts, and the description thereof will be omitted.

As shown in FIG. 9, the water level sensor unit 37A includes a filter member 379. The filter member 379 is provided at the lower end of the wall portion 378. The filter member 379 is a member that stops the foreign matter at the lower end portion of the wall portion 378 so that the foreign matter does not enter the gap S together with the washing water.

The filter member 379 is, for example, a mesh-like sheet member. In this case, the filter member 379 is detachably configured so that a plurality of types of filter members 379 having different mesh density can be replaced.

According to such a configuration, it is possible to prevent foreign matter from being mixed into the gap S by the filter member 379. As a result, the void S is clogged with foreign matter and prevents the water level in the void S from rising, so that the water level sensor 371 erroneously detects the water level or becomes undetectable and causes poor water stoppage. It can be suppressed. Further, since the filter member 379 is located at the lower end of the wall portion 378 which is the inlet or outlet of the washing water gap S, it is possible to prevent foreign matter from being mixed in at one place, and it is efficient and easy. It is possible to prevent foreign matter from entering.

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 described and described above. Accordingly, 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.

1 Washing toilet device 21 Toilet bowl body 35 Water supply device 34 Washing water tank 371 Water level sensor 375 Sensor holding part 378 Wall part 379 Filter member 38 Control device L Distance S Void W Washing water

Claims (6)

Toilet bowl body and
A wash water tank for storing wash water for washing the toilet body, and a wash water tank.
A water supply device that supplies wash water into the wash water tank,
A capacitive water level sensor that is placed in the wash water tank and measures the capacitance to detect the water level in the wash water tank.
A control device that controls the water supply device based on the detection result of the water level sensor, and
A sensor holding portion arranged in the washing water tank and extending in the vertical direction to hold the water level sensor,
A flush toilet device including a wall portion arranged outside the outer peripheral surface while having a gap between the sensor holding portion and the outer peripheral surface in the washing water tank. The flush toilet device according to claim 1, wherein the sensor holding portion is covered with the wall portion so that the lower end portion thereof does not protrude from the lower end portion of the wall portion. The flush toilet device according to claim 2, further comprising a filter member provided at the lower end portion of the wall portion and stopping foreign matter at the lower end portion of the wall portion. The flush toilet device according to any one of claims 1 to 3, wherein the gap is formed in the entire circumferential direction on the outer peripheral surface of the sensor holding portion. The flush toilet device according to any one of claims 1 to 4, wherein the sensor holding portion has a rectangular shape having a longitudinal direction and a lateral direction. The flush toilet device according to any one of claims 1 to 5, wherein the distance between the outer peripheral surface of the sensor holding portion and the inner peripheral surface of the wall portion is substantially constant.

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