JP7469739B2 - Toilet flushing system - Google Patents

Description

The disclosed embodiment relates to a toilet flushing system.

Conventionally, automatic toilet flushing devices are known that determine the type and amount of excrement discharged into the toilet bowl, and vary the amount of flush water supplied to clean the inside of the toilet bowl based on the results of that determination (see, for example, Patent Document 1).

The automatic toilet flushing device described in Patent Document 1 is equipped with a detection means for detecting changes in the water level in the toilet bowl, and estimates the type and amount of waste based on the amount of change in the water level in the toilet bowl, thereby changing the amount of flush water supplied to flush the toilet bowl. In other words, if the waste excreted in the toilet bowl is urine or a small amount of feces, the amount of flush water supplied to the toilet bowl is reduced, and if the waste excreted in the toilet bowl is a predetermined amount of feces, the amount of flush water supplied to the toilet bowl is increased.

JP 2001-214495 A

However, there is a problem in that the amount of flushing water required to flush stool out of the toilet varies greatly depending on the properties of the excreted stool. Specifically, stool that sinks in the water in the toilet bowl is discharged into the drain pipe immediately after the toilet starts flushing, so it can be discharged from the toilet with a small amount of water, whereas stool that floats in the water in the toilet bowl is not discharged into the drain pipe until the toilet is about to finish flushing, so a large amount of water is required to flush it out of the toilet.

Here, stool that floats in the water in the toilet bowl has a low density and is light in mass, so it does not change the level of the water in the toilet bowl very much. Therefore, in the automatic toilet flushing device described in Patent Document 1, which changes the amount of flush water supplied to the toilet bowl based on the amount of change in the water level in the toilet bowl, when stool that floats in the water in the toilet bowl is excreted, the amount of flush water supplied to the toilet bowl is reduced, which creates the problem of poor flushing.

The disclosed embodiment aims to solve the above-mentioned problems and provide a toilet flushing system that can supply an appropriate amount of flush water depending on the characteristics of the stool excreted in the toilet.

A toilet flushing system according to one embodiment includes a toilet with a bowl portion that receives stool excreted by a user, a flushing device that supplies flushing water to the toilet, a detection device that optically detects stool excreted by the user, a determination device that determines the properties of the stool based on the detection results by the detection device, and a control device that controls the flushing device, and the control device controls the amount of flushing water that the flushing device supplies to the toilet based on the properties of the stool determined by the determination device.

A toilet flushing system according to one aspect of the embodiment includes a detection device that optically detects stool excreted by a user, and a determination device that determines the properties of the stool based on the detection results from the detection device, and a control device controls the amount of flush water supplied to the toilet by the flushing device based on the properties of the stool determined by the determination device. This makes it possible to reduce the amount of flush water for stool determined to have properties that cause it to sink in the water in the toilet, and to increase the amount of flush water for stool determined to have properties that cause it to float in the water in the toilet.

In a toilet flushing system according to one aspect of the embodiment, the detection device is configured to redetect the presence or absence of stool remaining in the bowl after the flushing device has supplied flush water to the toilet, and the control device controls the amount of flush water that the flushing device will supply to the toilet from the next time onwards based on the result of the redetection.

In a toilet flushing system according to one embodiment, the presence or absence of stool remaining in the bowl is redetected after flushing is completed, and the control device controls the amount of flush water to be supplied by the flushing device from the next time onwards based on the result of the redetection. This allows the system to learn the appropriate amount of flush water according to the characteristics of the stool excreted by the user.

In a toilet flushing system according to one aspect of the embodiment, the detection device is configured to redetect the presence or absence of stool remaining in the bowl section after the flushing device supplies flush water to the toilet, and if the redetection detects that stool remains in the bowl section, the control device controls the flushing device to supply flush water to the toilet again.

According to a toilet flushing system according to one aspect of the embodiment, the presence or absence of stool remaining in the bowl is redetected after flushing is completed, and if the redetection indicates that stool remains in the bowl, the control device controls the flushing device to supply flush water to the toilet again. This makes it possible to prevent poor flushing.

According to one aspect of the embodiment, an appropriate amount of flush water can be supplied to the toilet depending on the characteristics of the stool excreted by the user.

FIG. 1 is a perspective view showing an example of the configuration of a toilet apparatus according to an embodiment of the present invention. 1 is a perspective view showing an example of a configuration of a detection device according to an embodiment of the present invention; FIG. 2 is a conceptual diagram showing an example of the functional configuration of the toilet flushing system according to one embodiment of the present invention. FIG. 2 is a block diagram showing an example of the functional configuration of the toilet flushing system according to one embodiment of the present invention. FIG. 2 is a block diagram showing an example of the functional configuration of the toilet flushing system according to one embodiment of the present invention. 4 is a flowchart showing an example of a processing procedure executed by the toilet flushing system according to one embodiment of the present invention. FIG. 1 is a diagram showing an example of data analysis regarding stool properties. FIG. 1 is a diagram showing an example of stool floating in standing water. FIG. 1 is a diagram showing an example of stool sinking in standing water.

Below, an embodiment of the toilet flushing system disclosed in this application will be described in detail with reference to the attached drawings. Note that the invention is not limited to the embodiment described below. Below, the process for determining the properties of stool excreted by the user and the configuration for performing this process will be described, but first the configuration of the toilet device, which is the premise of the process, will be described.

<1. Configuration of the toilet device>
First, the configuration of a toilet apparatus according to an embodiment will be described with reference to Fig. 1. Fig. 1 is a perspective view showing an example of the configuration of a toilet apparatus according to an embodiment.

As shown in FIG. 1, the toilet device 2 includes a toilet seat device 3 and a Western-style toilet (hereinafter referred to as the "toilet") 7. As shown in FIG. 1, the toilet 7 is installed on the floor surface F of the toilet room R. In addition, an operating device 10 is provided on a wall surface W of the toilet room R. In the following, the direction facing the interior of the space of the toilet room R from the floor surface F is described as "up."

The toilet bowl 7 is made of ceramic, for example. The toilet bowl 7 is formed with a bowl portion 8. The bowl portion 8 is concave downwards and is the portion that receives the feces excreted by the user. The toilet bowl 7 is not limited to being a floor-standing type as shown in the figure, but may also be a wall-mounted type. A flush water tank for storing flush water may be installed at the upper rear part of the toilet bowl 7, or the toilet may be a so-called tankless type in which no flush water tank is installed.

A rim portion 9 is formed on the upper edge of the toilet bowl 7. The top surface of the rim portion 9 faces the underside of the toilet seat 5 when closed. The rim portion 9 is provided with a rim water outlet (not shown) that discharges cleaning water supplied by a cleaning device (described below) into the bowl portion 8. The cleaning water discharged from this rim water outlet cleans the surface of the bowl portion 8 and also expels feces excreted by the user outside the toilet bowl 7.

The toilet seat device 3 is attached to the top of the toilet bowl 7 and includes a toilet cover 4, a toilet seat 5, and a functional part 6. The toilet seat device 3 may be attached removably to the toilet bowl 7, or may be attached so as to be integrated with the toilet bowl 7.

As shown in FIG. 1, one end of each of the toilet lid 4 and toilet seat 5 is pivotally supported by the functional part 6, and is attached so as to be rotatable (openable and closable) around the pivotal part of the functional part 6. When closed, the toilet lid 4 can cover the top of the toilet seat 4. The toilet lid 4 is attached to the toilet seat device 3 as necessary, and the toilet seat device 3 does not have to be equipped with a toilet lid 4.

2. Configuration of the detection device
Next, the configuration of a detection device for optically detecting feces excreted from a user will be described with reference to Fig. 2. Fig. 2 is a perspective view showing an example of the configuration of a detection device according to an embodiment.

The detection device 12 includes a light-emitting unit 14 that emits light in response to control instructions from a control device 24 (see FIG. 3), a light-receiving unit 16 that receives light reflected from feces excreted by the user in response to the light irradiated by the light-emitting unit 14, and a housing 19 for supporting the light-emitting unit 14 and the light-receiving unit 16. With this configuration, the detection device 12 optically detects feces excreted by the user.

The light-emitting unit 14 includes a light-emitting element (not shown), such as an LED (Light Emitting Diode). The light-emitting element included in the light-emitting unit 14 is not limited to an LED, and various elements may be used. Furthermore, the light emitted from the light-emitting unit 14 is not limited to white light having an even wavelength of visible light, but may be colored light having only a specific wavelength, or invisible light such as infrared light.

The light receiving unit 16 includes a lens 18 and a light receiving element (not shown). The light receiving element is formed, for example, by a line sensor or area sensor in which a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor is arranged. The light receiving unit 16 may also be configured to have a spectroscopic function such as a spectroscopic filter.

The detector 12 is preferably positioned so that the light-emitting unit 14 and the light-receiving unit 16 face the water in the toilet bowl 7 in order to detect the shape of the stool after it falls into the pool of water containing the stool.

The detection device 12 may be disposed inside the functional portion 6 or toilet seat 5 of the toilet seat device 3 and formed as an integral part of the toilet seat device 3, or may be disposed by hooking it between the rim portion 9 of the toilet bowl 7 and the toilet seat 5 and formed as a separate part from the toilet seat device 3.

<3. Configuration of the toilet flushing system>
Here, the configuration of the toilet flushing system will be described using Figures 3 to 5. First, the functional configuration of the toilet flushing system will be described with reference to Figure 3. Figure 3 is a conceptual diagram showing an example of the functional configuration of the toilet flushing system according to an embodiment.

As shown in Figure 3, the toilet flushing system 1 comprises a toilet device 2, a detection device 12, a flushing device 20, a determination device 22, and a control device 24. Note that while Figure 3 shows a configuration in which devices are separated according to the functions of the toilet flushing system 1, the toilet flushing system 1 may also be composed of devices that realize multiple functions. This will be described in more detail later.

The toilet device 1 includes a toilet bowl 7 and a toilet seat device 3 shown in FIG. 1, and is used as a device for users to excrete feces.

The detector 12 includes a light-emitting unit 14 and a light-receiving unit 16 as shown in FIG. 2, and is used as a device for optically detecting feces excreted by a user.

The flushing device 20 realizes the function of supplying flush water to the toilet bowl 7 .
The flushing device 20 is composed of, for example, a solenoid valve, which is a valve that controls the flow of a fluid by an electromagnetic method, and a flow adjustment valve. The solenoid valve is provided, for example, in a flush water tank installed at the rear upper part of the toilet bowl 7, and the opening and closing time is controlled according to a control command from the control device 24. The flow adjustment valve is configured, for example, to control the amount of flush water per unit time to a jet outlet (not shown) that discharges flush water from below the toilet bowl 7 toward a drain pipe, and the valve opening is controlled according to a control command from the control device 24. In this way, the amount of flush water supplied to the toilet bowl 7 is controlled.

The determination device 22 realizes a function of determining the properties of the stool based on the detection result by the detection device 12. The determination device 22 determines whether the properties of the stool excreted by the user are stool that will sink in the water in the toilet bowl 7 or stool that will float in the water in the toilet bowl 7. The determination device 22 automatically determines the properties of the stool by dividing them into at least two types of results corresponding to stool that will sink in the water in the toilet bowl 7 and stool that will float in the water in the toilet bowl 7.

The determination device 22 may determine a more detailed classification than the two classifications of stool that sinks in the water in the toilet bowl 7 and stool that floats in the water in the toilet bowl 7. The determination device 22 may determine which of the seven classifications on the Bristol scale the stool excreted by the user falls into. The process performed by the determination device 22 to determine the properties of the stool will be described later.

The control device 24 functions as a control unit that controls various components and processes. The control device 24 controls the detection device 12 and the flushing device 20. The control device 24 controls the amount of flush water that the flushing device 20 supplies to the toilet bowl 7 based on the properties of the stool determined by the determination device 22. The control device 24 sends control instructions to the detection device 12 to control the turning on and off of the light-emitting unit 14.

The control device 24 determines the amount of flush water to be supplied to the toilet bowl 7 by the flushing device 20. The control device 24 transmits a control instruction to the flushing device 20 corresponding to the amount of flush water to be supplied to the toilet bowl 7. The control device 24 determines the content of the control instruction to be transmitted to the flushing device 20 based on the properties of the stool determined by the determination device 22. By transmitting the control instruction to the flushing device 20, the control device 24 executes a toilet flushing operation that supplies flush water to the toilet bowl 7.

For example, when the stool determined by the determination device 22 has a property that causes it to float in the water in the toilet bowl 7, the control device 24 controls the amount of flushing water supplied to the toilet bowl 7 by the flushing device 20 to be greater than when the stool determined by the determination device 22 has a property that causes it to sink in the water in the toilet bowl 7.

The control device 24 transmits control instructions to the detection device 12 for controlling the function of the electronic shutter of the light receiving unit 16. The electronic shutter of the light receiving unit 16 is a shutter type that electronically controls the light receiving element (image sensor) to read out the exposure, unlike a mechanical shutter such as a so-called lens shutter. In other words, the electronic shutter of the light receiving unit 16 is a so-called electronic shutter or electronically controlled shutter. The control device 24 transmits control instructions to the detection device 12 and the cleaning device 20 via a wired connection. The control device 24 may also transmit control instructions to the detection device 12 and the cleaning device 20 wirelessly.

The control device 24 controls the emission of light by the light-emitting unit 14. The control device 24 controls the supply of electricity to the light-emitting element and the application of voltage to the light-receiving element. The control device 24 transmits a control instruction to the light-receiving element to open the electronic shutter, and by supplying electricity to the light-emitting element, performs light-receiving control that enables the reception of light reflected from the stool.

The control device 24 also controls the toilet lid 4 and toilet seat 5 as shown in FIG. 1. The control device 24 controls the toilet lid 4 and toilet seat 5 based on control instructions sent from the operation device 24. The control device 24 controls the toilet lid 4 based on a control instruction signal regarding the opening and closing of the toilet lid sent from the operation device 10. The control device 24 controls the toilet seat 5 based on a control instruction signal regarding the opening and closing of the toilet seat sent from the operation device 10. The control device 24 sends control instructions to the toilet lid 4 and toilet seat 5 via a wired connection. The control device 24 may also send control instructions to the toilet lid 4 and toilet seat 5 wirelessly.

The control device 24 has various components, such as an arithmetic processing device 25 that executes calculations related to the above-mentioned control, a ROM (Read Only Memory) 26 that stores a control program to be executed by the arithmetic processing device 25, and a RAM (Random Access Memory) 27 that temporarily stores various data.
The arithmetic processing device 25 is realized by various means, for example, a processor such as a CPU (Central Processing Unit), MPU (Micro Processing Unit), or ASIC (Application Specific Integrated Circuit), or an integrated circuit such as an FPGA (Field Programmable Gate Array).

<3-1. Example of toilet flushing system configuration>
Next, an example of the configuration of a toilet flushing system will be described with reference to Fig. 4 and Fig. 5. Fig. 4 and Fig. 5 are block diagrams showing an example of the functional configuration of a toilet flushing system according to an embodiment.

In the toilet flushing system 1 shown in Fig. 4, the functions of the determination device 22 are realized by a control device 24 equipped with an arithmetic processing device 25 such as a CPU. In this way, a plurality of functions may be realized by a single device.
In the toilet flushing system 1 shown in Fig. 4, the flushing device 20 is provided in the toilet 7, and the detection device 12 and the control device 24 are provided in the toilet seat device 3. The detection device 12 and the flushing device 20 are connected to the control device 24 via an electronic circuit.

In the toilet flushing system 1 shown in FIG. 4, the detection device 12 optically detects feces excreted by the user based on a control instruction from the control device 12 provided in the toilet seat device 3. The data detected by the detection device 12 is temporarily stored in the RAM 27 via an electronic circuit (e.g., an AD Converter, etc.). Next, the calculation processing device 25 analyzes the detection data stored in the RAM 27 based on a program for determining the properties of the feces stored in the ROM 26. Then, the control device 24 transmits a control instruction to the flushing device 20 regarding the amount of flush water to be supplied to the toilet bowl 7 based on the analyzed properties of the feces. In this way, the toilet flushing system 1 shown in FIG. 4 can supply an appropriate amount of flush water to the toilet bowl 7 according to the properties of the feces excreted by the user.

In the toilet flushing system 1 shown in Fig. 5, the toilet seat device 3 and the detection device 12 are configured as separate entities. The detection device 12 is used, for example, by being hooked between the rim portion 9 of the toilet seat device 3 and the toilet seat 5.
In the toilet flushing system 1 shown in Fig. 5, the determination device 22 is provided outside the toilet room R. The determination device 22 is realized, for example, by a cloud server, which is a virtual server whose computing performance and storage (storage device) capacity are scalable.
In the toilet flushing system 1 shown in FIG. 5, the detection device 12, the toilet seat device 3, and the determination device 22 are each connected by a communication device 28, which may be wired or wireless.

In the toilet flushing system 1 shown in FIG. 5, the detection device 12 is equipped with a control device 24 itself, and optically detects stool excreted by the user based on control instructions from the control device 24. Data detected by the detection device 12 is sent to the cloud server, which is the determination device 22, via the communication device 28. The cloud server then analyzes the detection data based on a program for determining the properties of the stool, and sends the analysis results via the communication device 28 to the control device 24 equipped in the toilet seat device 3. The control device 24 then sends control instructions to the flushing device 20 regarding the amount of flush water to be supplied to the toilet 7 based on the analyzed properties of the stool. In this way, the toilet flushing system 1 shown in FIG. 5 can supply an appropriate amount of flush water to the toilet 7 according to the properties of the stool excreted by the user.

The configuration of the toilet flushing system 1 is not limited to the configuration examples shown in Figures 4 and 5 above, and may be, for example, a configuration in which the control device 24 is incorporated in the toilet 7 rather than in the toilet seat device 3, or a configuration in which the communication device 28 provided in the detection device 12 transmits detection data directly to a determination device 22 (cloud server) outside the toilet room R without going through the toilet seat device 3.

4. Treatment of the toilet flushing system
From here, the processing flow of the toilet flushing system will be explained using Fig. 6. Fig. 6 is a flow chart showing an example of the procedure of processing executed by the toilet flushing system.

As shown in FIG. 6, the toilet flushing system 1 detects feces excreted into the toilet bowl 7 (step S101). The toilet flushing system 1 detects feces excreted into the toilet bowl 7 by the user using the detection device 12.

The toilet flushing system 1 determines the properties of the stool from the detection results by the detection device 12 (step S102). The toilet flushing system 1 determines the properties of the stool from the detection results by the detection device 12 using the determination device 22.

The toilet flushing system 1 determines the amount of flush water based on the result of the determination by the determination device 22 (step S103). The toilet flushing system 1 determines the amount of flush water to be supplied to the toilet 7 by the flushing device 20 based on the result of the determination by the determination device 22.

The toilet flushing system 1 executes the toilet flushing operation (step S104). In the toilet flushing system 1, the control device 24 controls the flushing device 20 and supplies the amount of flush water determined in the previous process (step S103) into the toilet 7.

The toilet flushing system 1 redetects feces excreted into the toilet bowl 7 (step S105). The toilet flushing system 1 redetects feces excreted into the toilet bowl 7 by the user using the detection device 12.

The toilet flushing system 1 determines whether or not there is feces remaining in the bowl portion 8 based on the result of re-detection by the detection device 12 (step S106). The toilet flushing system 1 determines whether or not there is feces remaining in the bowl portion 8 based on the result of re-detection by the detection device 12 using the determination device 22.

If re-detection by the detection device 12 detects that stool remains in the bowl portion 8 (step S106, No), the toilet flushing system 1 returns to step S102, determines the nature of the stool remaining in the bowl portion 8, determines an appropriate amount of flush water, and executes the toilet flushing operation. This makes it possible to prevent poor flushing. If a foreign object is dropped into the toilet 7, there is a risk that the toilet flushing operation will be repeated indefinitely. Therefore, if a foreign object is detected to remain in the bowl portion 8 even after the toilet flushing operation has been performed more than a predetermined number of times (e.g., twice), the toilet may be configured to notify the outside of a clogged toilet.

When the re-detection by the detection device 12 detects that no stool remains in the bowl portion 8 (step S106, Yes), the toilet flushing system 1 stores the result of the determination regarding the properties of the stool determined by the determination device 22, together with the amount of flush water used until the stool is expelled from the toilet bowl 7 (step S107).

The amount of flush water (including the amount of water per unit time) required to expel stool from the toilet bowl 7 varies not only with the characteristics of the stool but also with the shape of the toilet bowl, etc. According to step S107, for each use by a user, in a toilet bowl 7 having a predetermined shape and equipped with a detection device 12, the control device 24 learns the optimal amount of flush water (the minimum amount of water required) for the characteristics of the stool determined by the determination device 22, and can feed this back into the control of the amount of flush water from the next time onwards. In other words, by having the control device 24 perform machine learning, the toilet flushing system 1 can be optimized so that it can supply the minimum amount of water required to the toilet bowl 7 according to the characteristics of the stool excreted by the user.

5. Data analysis using a judgment device
From here, data analysis on stool properties will be described with reference to Figures 7 to 9. Figure 7 is a diagram showing an example of data analysis on stool properties. Figure 8 is a diagram showing an example of stool that floats in pooled water. Figure 9 is a diagram showing an example of stool that sinks in pooled water.

The following describes an example in which the control device 24 provided in the toilet seat device 3 executes the process of analyzing data related to stool properties. Note that this data analysis may be performed by a cloud server that is provided outside the toilet room R and connected to the toilet seat device 3 via communication, as shown in FIG. 5.

Object OB1 in Figure 7 is a schematic representation of the stool to be detected, and the outline of how the properties of stool are measured will be explained using object OB1 as an example. Note that in the following explanation, the longitudinal direction of object OB1 is defined as the up-down direction, and the direction perpendicular to the longitudinal direction (short direction) is defined as the lateral direction.

Each of the measurement results RS1 to RS3 is a graph showing the relationship between each pixel and its reflectance. Each of the measurement results RS1 to RS3 shows the measurement result corresponding to each position in the vertical direction of the object OB1. Measurement result RS1 shows the measurement result corresponding to the top end of the object OB1. Measurement result RS2 shows the measurement result corresponding to the center in the vertical direction of the object OB1. Measurement result RS3 shows the measurement result corresponding to the bottom end of the object OB1.

The control device 24 detects whether or not there is reflectance for each pixel where light is received by the light receiving element. The control device 24 finds a peak value from among the pixels where there is reflection. In each of the measurement results RS1 to RS3, the central part is the peak value. For example, in the measurement result RS2, the control device 24 identifies pixel X0 as the image having the peak value.

The control device 24 compares the difference in reflectance between the pixel with the peak value and the adjacent pixel, and if it finds that the reflectance is above or below a predetermined value, it assumes that the light is reflected from feces.

If the control device 24 confirms that the reflected light is from stool, it performs the same process on the pixels adjacent to that pixel. In this way, the control device 24 identifies the edge of the stool and estimates the width of the stool. For example, the control device 24 estimates that the range from pixel X1 to image X2 in measurement result RS2 is excrement. In measurement result RS1, the control device 24 estimates that the width L, which is narrower than the range from pixel X1 to image X2 in measurement result RS2, is the width of the stool. The control device 24 analyzes the shape of the stool by stacking each of the measurement results RS1 to RS3, etc. In the example of FIG. 7, the control device 24 analyzes that the part corresponding to measurement result RS2 (center part) is the widest and the width becomes narrower toward the part corresponding to measurement result RS1 (top end) and the part corresponding to measurement result RS3 (bottom end).

By the above-mentioned process, the detection device 12 detects stool (object OB1) excreted by the user. Then, when the determination device 22 detects stool with a small central area corresponding to RS2, i.e., when a small volume of stool is detected, it determines that the stool is the type that would float in the water in the toilet bowl 7 as shown in FIG. 8. On the other hand, when the determination device 22 detects stool with a large central area corresponding to RS2, i.e., when a large volume of stool is detected, it determines that the stool is the type that would sink in the water in the toilet bowl 7 as shown in FIG. 9.

The determination made by the determination device 22 is not limited to the above, and if the outline of the central portion corresponding to the RS2 portion is straight, it may be determined that the stool is rod-shaped and firm, and therefore will sink in the water in the toilet bowl 7, and if the outline of the central portion corresponding to the RS2 portion is irregular, it may be determined that the stool is watery and loose, and therefore will float in the water in the toilet bowl 7.

In addition, if there is a predetermined number or more of feces detected within the range detected by the detection device 12, it may be determined that the feces is of a low density and floats in the accumulated water, so that it will break apart upon impact when it hits the water in the toilet bowl 7. In this way, there are an infinite number of shapes of feces that can be detected by the detection device 12. Therefore, rather than having the determination device 22 learn by machine learning how to strictly determine the characteristics of the feces, it is preferable to have the determination device 22 learn by machine learning the characteristics of the feces in combination with the amount of flushing water used until the feces is completely expelled from the toilet bowl 7. This makes it easier to develop a determination device that can supply an appropriate amount of flushing water to the toilet bowl according to the characteristics of the feces excreted by the user.

1... Toilet flushing system 2... Toilet device 3... Toilet seat device 4... Toilet cover 5... Toilet seat 6... Functional section 7... Toilet 8... Bowl section 9... Rim section 10... Operation device 12... Detection device 14... Light-emitting section 16... Light-receiving section 18... Lens 19... Housing 20... Flushing device 22... Determination device 24... Control device 25... Arithmetic processing device 26... ROM
27. RAM
28...Communication device

Claims (3)

A toilet having a bowl portion for receiving feces excreted by a user;
A flushing device for supplying flush water to the toilet bowl;
A detection device that optically detects feces excreted from a user;
A determination device that determines the properties of stool based on the detection result by the detection device;
A control device for controlling the cleaning device,
the control device controls the amount of flush water supplied to the toilet by the flushing device based on the properties of the stool determined by the determination device,
the detection device is configured to redetect the presence or absence of stool remaining in the bowl portion after the flushing device has supplied flush water to the toilet bowl,
The control device is a toilet flushing system that, when the re-detection detects that no stool remains in the bowl portion, controls the amount of flush water that the flushing device will supply to the toilet from the next time onwards . The toilet flushing system according to claim 1, wherein, when the re-detection detects that stool remains in the bowl portion, the control device controls the flushing device to supply flush water to the toilet again. A toilet having a bowl portion for receiving feces excreted by a user;
A flushing device for supplying flush water to the toilet bowl;
A detection device that optically detects feces excreted from a user;
A determination device that determines the properties of stool based on the detection result by the detection device;
A control device for controlling the cleaning device,
the control device controls the amount of flush water supplied to the toilet by the flushing device based on the properties of the stool determined by the determination device,
the detection device is configured to redetect the presence or absence of stool remaining in the bowl portion after the flushing device has supplied flush water to the toilet bowl,
A toilet flushing system in which, when the re-detection detects that stool remains in the bowl portion, the control device controls the flushing device to supply flush water to the toilet again.