Flush toilet apparatus

Abstract

An object of the present invention is to provide a flush toilet apparatus capable of accurately measuring the amount of urine when water is saved.SOLUTION: The present invention provides a flush toilet apparatus 1 for measuring a urine volume of a user, the flush toilet apparatus 1 including a bowl 6 configured to receive urine of the user, a discharge trap conduit 8 provided at a bottom portion of the bowl 6, a discharge socket 20 configured to connect a downstream end of the discharge trap conduit 8 to a discharge pipe, a urine-volume measuring device 40 configured to measure a urine volume based on a rise in a water level of pooled water W in the bowl 6, and an opening / closing device 46 provided in the discharge socket 20 and configured to close or open an internal flow passage 21 of the discharge trap conduit 20. And a control part 50 for controlling the urine volume measuring device 40 and the opening / closing device 46, and when the control part 50 receives a start signal of urine volume measurement, the control part 50 operates the opening / closing device 46 to close the internal flow path 21, and causes the pressure of air in the closed space S of the internal flow path 21 to act on the pooled water W.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a flush toilet apparatus, and more particularly to a flush toilet apparatus that measures the amount of urine a user produces. [Background technology]

[0002] BACKGROUND ART Flush toilet devices that measure the amount of urine a user produces are known, as described in Patent Documents 1 and 2. The flush toilet device described in Patent Document 1 measures the amount of urine a user urinates by detecting the amount of accumulated water that falls over the top of the drain trap pipe when the user urinates. Furthermore, the flush toilet device described in Patent Document 2 measures the amount of urine a user produces by lowering the stored water to an initial water level that is lower than the specified water level, and then detecting the rising water level of the stored water that rises from the initial water level when the user urinates. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-278107 [Patent Document 2] Patent No. 3876919 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the flush toilet device described in Patent Document 1 detects falling pooled water, which poses the problem of requiring a highly accurate sensor for this detection. Meanwhile, the flush toilet apparatus described in Patent Document 2 has the advantage of being able to measure urine volume simply because it detects the rising level of the accumulated water. However, in recent years, demands for water conservation have led to a decrease in the amount of accumulated water, which has reduced the range over which the accumulated water level can move up and down. This can cause the accumulated water to exceed the top of the drain trap pipe when a user urinates, making it impossible to accurately measure the rising level of the accumulated water and therefore the urine volume.

[0005] Therefore, the present invention was made to solve the above-mentioned conventional problems, and aims to provide a flush toilet apparatus that can accurately measure urine volume when water is saved. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, a flush toilet device that measures the amount of urine a user receives comprises: a bowl portion that receives the user's urine; a drain trap pipe that is provided at the bottom of the bowl portion and extends upward; an ascending pipe that is provided at the bottom of the bowl portion and extends upward; a descending pipe that extends downward from the ascending pipe; and a top that is located between the descending pipe and the ascending pipe and determines the specified water level of the accumulated water; a drain socket that connects the downstream end of the drain trap pipe to the drain piping; a urine volume measuring device that measures the amount of urine based on the rise in the level of the accumulated water in the bowl portion; an opening and closing device that is provided in the drain trap pipe or the drain socket and closes or opens the internal flow path of the drain trap pipe or the drain socket; and a control unit that controls the urine volume measuring device and the opening and closing device based on a urine volume measurement start signal; and when the control unit receives the urine volume measurement start signal, it operates the opening and closing device to close the internal flow path and applies the air pressure in the closed space of the internal flow path to the accumulated water.

[0007] In the present invention configured as described above, when the control unit receives a urine volume measurement start signal, it activates the opening and closing device to close the internal flow path and applies air pressure in the closed space of the internal flow path to the accumulated water, so that when the user urinates, the water level in the bowl portion can be raised without the accumulated water exceeding the top of the drain trap pipe. This allows for accurate measurement of urine volume even when water is saved.

[0008] In the present invention, preferably, the toilet seat device comprises a main body, a cleaning nozzle that is movable forward and backward from the main body and sprays cleaning water, and a toilet seat that is rotatably attached to the main body and placed on the top surface of the toilet body, and the urine volume measuring device is provided in the toilet seat device. In the present invention configured in this manner, a toilet seat device is provided which includes a main body, a cleaning nozzle which is movable forward and backward from the main body and sprays cleaning water, and a toilet seat which is rotatably attached to the main body and placed on the top surface of the toilet body, and since the urine volume measuring device is provided in the toilet seat device, the urine volume measuring device can be installed on an existing toilet by simply replacing the toilet seat device without changing the toilet body.

[0009] In the present invention, the opening and closing device is preferably provided in the drain socket. In the present invention configured in this manner, the opening and closing device is provided in the drain socket, so the opening and closing device can be installed on an existing toilet simply by replacing the drain socket without changing the toilet body.

[0010] In the present invention, the urine volume measuring device is preferably provided in the drain socket. In the present invention configured in this manner, the urine volume measuring device is provided in the drain socket, so that the urine volume measuring device can be installed on an existing toilet simply by replacing the drain socket without changing the toilet body.

[0011] In addition, in the present invention, it is preferable to have a flush start switch for starting toilet flushing and a measurement start switch for starting urine volume measurement, and when the measurement start switch is operated, the control unit activates the opening and closing device to close the internal flow path, and then activates the urine volume measuring device to start urine volume measurement. The present invention configured in this manner has a flush start switch for starting toilet flushing and a measurement start switch for starting urine volume measurement, and when the measurement start switch is operated, the control unit activates the opening and closing device to close the internal flow path, and then activates the urine volume measurement device to start urine volume measurement, so that urine volume measurement can be performed reliably.

[0012] In the present invention, preferably, when the flush start switch is operated, the control unit activates the opening and closing device to open the internal flow path, and then starts flushing the toilet. In the present invention configured in this manner, when the flush start switch is operated, the control unit activates the opening and closing device to open the internal flow path and then starts flushing the toilet, ensuring reliable toilet flushing. [Effects of the Invention]

[0013] According to the flush toilet device of the present invention, urine volume can be measured with high accuracy when water is saved. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view of a flush toilet apparatus according to an embodiment of the present invention. FIG. [Figure 2] 1 is a side cross-sectional view of a flush toilet apparatus according to an embodiment of the present invention. [Figure 3] FIG. 1 is a block diagram showing the configuration of a flush toilet apparatus according to an embodiment of the present invention. [Figure 4] 4 is a time chart showing the operation of a flush toilet apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] A flush toilet apparatus 1 according to an embodiment of the present invention will now be described with reference to the accompanying drawings. First, the overall structure of a flush toilet apparatus 1 according to an embodiment of the present invention will be explained using Figs. 1 to 3. FIG. 1 is a perspective view of a flush toilet apparatus 1 according to an embodiment of the present invention, FIG. 2 is a side cross-sectional view of a flush toilet apparatus 1 according to an embodiment of the present invention, and FIG. 3 is a block diagram showing the configuration of a flush toilet apparatus 1 according to an embodiment of the present invention. In this specification, the front will be referred to as "front", the rear as "rear", the left as "left", and the right as "right" when viewed from the perspective of a user seated on the toilet seat.

[0016] As shown in Figures 1 and 2, the flush toilet device 1 comprises a ceramic toilet body 2, a toilet seat device 4 placed on the top surface of the toilet body 2, and a water storage tank 5 that stores flush water to be supplied to the toilet body 2.

[0017] As shown in Figure 2, the toilet body 2 is formed with a bowl portion 6 that receives waste, a drain trap pipe 8 that is provided at the bottom of the bowl portion 6 and that discharges waste by siphon action, a rim spout 10 that spouts water from the rim, and a rim water conduit 12 that supplies flushing water to the rim spout 10. Thus, in this embodiment, the toilet body 2 is a siphon type toilet that discharges waste by generating a siphon action through the rim spout, but it may also be a wash-down type toilet that washes away waste by the flowing water caused by the difference in water height within the bowl portion.

[0018] The bowl portion 6 comprises a bowl-shaped waste receiving surface 14, a rim portion 16 formed along the upper edge of the bowl portion 6, and a basin portion 18 formed below the waste receiving surface 14 and in which pooled water W is formed.

[0019] The drain trap pipe 8 is equipped with an inlet portion 8a connected to the pot portion 18, an introduction pipe 8b extending downward from the inlet portion 8a, an ascending pipe 8c extending upward from the introduction pipe 8b, a descending pipe 8d extending downward from the ascending pipe 8c, and a top portion 8e located between the descending pipe 8d and the ascending pipe 8c and defining a specified water level L1 of the accumulated water W. The downstream end of the descending pipe 8d of the drain trap pipe 8 is connected to a drain piping (not shown) via a drain socket 20. The drain trap pipe 8 and the drain socket 20 have an internal flow path 21 formed therein through which flush water, waste, etc. flow.

[0020] Rim spout 10 is located on the rear right side in a plan view of bowl portion 6. Rim spout 10 spouts flush water rearward, and this flush water swirls along the inner circumferential surface of rim portion 16 before flowing down to waste receiving surface 14. In this embodiment, rim spout 10 is located on the rear right side in a plan view of bowl portion 6, but rim spout 10 may also be located on the front left side in a plan view of bowl portion 6 and spout water forward.

[0021] As shown in Figure 3, flush water from a water supply source 22, such as a water line, is supplied to the toilet seat device 4 and the water storage tank 5 via a stop valve 24 and a branch fitting 26. The water storage tank 5 is provided with a water supply valve 28 for supplying flush water into the water storage tank 5, and a drain valve 30 for discharging flush water out of the water storage tank 5. The drain valve 30 is actuated when the user starts a toilet flush, so that flush water in the water storage tank 5 is supplied to the toilet body 2. The flush water supplied from the water storage tank 5 to the toilet body 2 is supplied to the rim water conduit 12 and is discharged from the rim spout 10.

[0022] As shown in Figures 2 and 3, the toilet seat device 4 comprises a main body 32, a cleaning nozzle 34 that is movable forward and backward from the main body 32, a toilet seat (not shown) that is rotatably attached to the main body 32, a toilet lid 36 that is rotatably attached to the main body 32 so as to cover the toilet seat, and a human body detection sensor 38 for detecting whether a user is present.

[0023] The cleaning nozzle 34 is attached to the main body 32 so as to be movable forward and backward toward the inside of the bowl 6. The cleaning nozzle 34 sprays cleaning water from a nozzle 34a provided at the tip, so that the private parts of the user of the toilet seat device 4 are cleaned.

[0024] The toilet seat is rotatably attached to the main body 32 and placed on the top surface of the toilet body 2 so as to surround the bowl 6. The toilet lid 36 is rotatably attached to the rear of the main body 32. When the toilet lid 36 is closed, the main body 32 and the toilet seat are covered by the toilet lid 36.

[0025] The human body detection sensor 38 is an infrared sensor that detects infrared rays emitted from the user. The human body detection sensor 38 is mounted on the main body 32 so as to face forward. When the human body detection sensor 38 receives infrared rays reflected from the user, it determines that the user is in the toilet room.

[0026] As shown in Figures 2 and 3, the urine volume measuring device 40 is used to measure the volume of urine excreted by a user (subject). The urine volume measuring device 40 measures the volume of urine based on the rise in the level of the accumulated water W in the bowl portion 6. Here, the accumulated water W to be measured does not only include water, but also water mixed with urine. The volume of urine also includes the total volume of urine during urination and the urinary flow rate, which is the volume of urine per unit time.

[0027] Urine volume measuring device 40 is provided with a first water level detection sensor 42 that is provided in toilet seat device 4 and directly detects the water level of accumulated water W in bowl portion 6, and a second water level detection sensor 44 that is provided in drain socket 20 and indirectly detects the water level of accumulated water W in bowl portion 6. In this embodiment, urine volume measuring device 40 is provided with two water level detection sensors, but it may be provided with only one of first water level detection sensor 42 and second water level detection sensor 44, or with a sensor other than these sensors.

[0028] First water level detection sensor 42 is a microwave sensor that measures the time from transmitting a microwave to receiving a reflected wave. Specifically, first water level detection sensor 42 transmits microwave A toward the surface of accumulated water W in bowl portion 6 and receives microwave B reflected by the surface of accumulated water W (see FIG. 2). The water level of accumulated water W in bowl portion 6 is measured based on the round-trip time of the microwave. Note that in this embodiment, a microwave sensor is used as first water level detection sensor 42, but any sensor that can detect the water level of accumulated water W in the bowl portion, such as an ultrasonic sensor, float sensor, image sensor, or weight sensor, may be used.

[0029] Second water level detection sensor 44 is a pressure sensor that detects the pressure in internal flow path 21. Specifically, second water level detection sensor 44 measures the pressure in internal flow path 21 when the water level of accumulated water W in bowl portion 6 rises. The water level of accumulated water W in bowl portion 6 is calculated from the measured pressure based on a predetermined correlation graph between the accumulated water W in bowl portion 6 and the pressure in internal flow path 21. In this embodiment, a pressure sensor is used as second water level detection sensor 44, but any sensor, such as a temperature sensor, may be used as long as it can measure the water level of accumulated water W in the bowl portion.

[0030] As shown in FIGS. 2 and 3, the opening / closing device 46 is provided in the drain socket 20 and serves to close or open the internal flow path 21 of the drain socket 20. The opening / closing device 46 includes a rotary shaft 46a, a valve element 46b that rotates about the rotary shaft 46a, and a drive motor (not shown) that rotates the valve element 46b about the rotary shaft 46a. During toilet flushing, the valve element 46b is maintained in an open state that opens the internal flow path 21 in the drain socket 20, as shown in FIG. 2 (see the double-dotted chain in FIG. 2). During urine volume measurement, the drive motor is activated to rotate the valve element 46b about the rotary shaft 46a, maintaining the valve element 46b in a closed state that closes the internal flow path 21 in the drain socket 20 (see the solid line in FIG. 2). In the closed state, the valve element 46b is in contact with the inner wall of the drain socket 20 without creating any gaps. This prevents air present in the internal flow path 21 between the valve element 46b and the accumulated water W in the drain trap pipe 8 from leaking to the outside. In this embodiment, the opening and closing device 46 is provided in the drain socket 20, but the opening and closing device 46 may also be provided in the drain trap pipe line 8.

[0031] As shown in Figures 2 and 3, the make-up water device 48 is used to supply make-up water to the stored water W. The make-up water device 48 is configured to supply a predetermined amount of flush water from the flush nozzle 34 of the toilet seat device 4 to the bowl portion 6 before starting urine volume measurement. This predetermined amount of flush water is set to a sufficient amount (e.g., approximately 300 cc) so that the stored water W will exceed the top 8e of the drain trap pipe 8 when make-up water is supplied. The supply of make-up water to the stored water W is managed by a timer, and flush water is supplied from the flush nozzle 34 for several seconds (e.g., approximately 5 seconds). In this embodiment, make-up water is supplied to the stored water W from the flush nozzle 34 of the toilet seat device 4, but a water discharge device may be provided separately from the flush nozzle 34, and make-up water may be supplied from this water discharge device.

[0032] As shown in FIG. 3 , the control unit 50 is electrically connected to the human body detection sensor 38, the flush start switch 52 for starting toilet flushing, the measurement start switch 54 for starting urine volume measurement, the toilet seat device 4, the urine volume measuring device 40, the opening / closing device 46, the water replenishment device 48, and the drain valve 30 in the water storage tank 5, and is capable of transmitting and receiving various signals. When the measurement start switch 54 is operated, the control unit 50 activates the opening / closing device 46 to close the internal flow path 21, and then activates the urine volume measuring device 40 to start urine volume measurement. When the flush start switch 52 is operated, the control unit 50 activates the opening / closing device 46 to open the internal flow path 21, and then starts toilet flushing. Furthermore, the control unit 50 calculates the urine volume based on the rising water level of the accumulated water W in the bowl unit 6 measured by the first water level detection sensor 42 and the second water level detection sensor 44. The control unit 50 also transmits the urine volume data to the user's portable information terminal, the administrator's personal computer, or the like.

[0033] Next, the operation of the flush toilet device 1 according to this embodiment of the present invention will be explained. Figure 4 is a time chart showing the operation of a flush toilet device 1 according to the first embodiment of the present invention. In Figure 4, t indicates each time.

[0034] At t1, when a user enters the toilet room, the human body detection sensor 38 detects the user's presence. In response, the control unit 50 opens the toilet lid 36. The user sits on the toilet seat and operates the measurement start switch 54 to measure the urine volume.

[0035] At t2, when the control unit 50 receives a start signal from the measurement start switch 54, it first activates the make-up water device 48 to start supplying make-up water to the accumulated water W. At t2, due to the influence of pressure fluctuations in the drainage pipe, the accumulated water W has reached an initial water level L0, which is lower than the specified water level L1 (see FIG. 2). Note that in this embodiment, the supply of make-up water is started in response to a start signal from the measurement start switch 54, but the supply of make-up water may also be started automatically in response to a start signal from, for example, the human body detection sensor 38.

[0036] Between t2 and t3, the control unit 50 activates the makeup water device 48 to supply makeup water from the cleaning nozzle 34 to the pooled water W. This causes the pooled water W to rise from the initial water level L0 to a specified water level L1. This specified water level L1 serves as a reference water level when measuring the rising water level of the pooled water W in the bowl portion 6.

[0037] At t3, after the supply of makeup water is completed, the control unit 50 activates the drive motor of the opening and closing device 46 to close the valve body 46b. The internal flow path 21 is closed by the valve body 46b, and a closed space S is formed between the valve body 46b and the accumulated water W in the drain trap pipe line 8. The valve body 46b is in contact with the inner wall of the drain socket 20 without any gaps, so the closed space S is sealed. This allows the pressure P of the air present in the closed space S to act on the surface of the accumulated water W in the drain trap pipe line 8 (see FIG. 2).

[0038] Furthermore, the control unit 50 activates the opening and closing device 46 to close the internal flow path 21, and then activates the urine volume measuring device 40 to start measuring the urine volume.

[0039] Between t4 and t5, the user urinates into the bowl portion 6 to measure the urine volume. Air pressure P acts on the surface of the accumulated water W in the drain trap pipe 8, so that even when urine is excreted, the accumulated water W does not flow over the top 8e of the drain trap pipe 8. As a result, when urine is excreted into the bowl portion 6, only the level of the accumulated water W in the bowl portion 6 rises. The accumulated water W in the bowl portion 6 rises by the amount of urine excreted, from the specified water level L1 to the post-excretion elevated water level L2 (see Figure 2). At t5, the user's excretion is complete.

[0040] Between t3 and t6, the control unit 50 operates the urine volume measuring device 40 to measure the urine volume. Specifically, the first water level detection sensor 42 and the second water level detection sensor 44 measure the rising water level L2 of the accumulated water W in the bowl portion 6. The first water level detection sensor 42 directly measures the rising water level L2 of the accumulated water W in the bowl portion 6 using microwaves. The second water level detection sensor 44 measures the pressure in the closed space S of the internal flow path 21. The pressure in the closed space S of the internal flow path 21 changes depending on the water level of the accumulated water W in the bowl portion 6, so measuring this pressure can measure the rising water level L2 of the accumulated water W in the bowl portion 6. The control unit 50 calculates the urine volume based on the measured rising water level L2 of the accumulated water W in the bowl portion 6. The control unit 50 also transmits the urine volume data to the user's portable information terminal, the administrator's personal computer, or the like.

[0041] At t6, the user operates the flush start switch 52 to flush the toilet.

[0042] At t7, when the control unit 50 receives a start signal from the measurement start switch 54, it activates the drive motor of the opening / closing device 46 to open the valve body 46b. This opens the internal flow path 21 and puts it in a communicating state. In the open state, the valve body 46b is adjacent to the inner wall of the drain socket 20 (see FIG. 2). This prevents the flow of cleaning water through the internal flow path 21 from being obstructed.

[0043] Between t7 and t8, when the control unit 50 receives a start signal from the measurement start switch 54, it drives the drain valve 30 in the water storage tank 5, causing flush water to be discharged from the rim spout 10. The flush water discharged from the rim spout 10 flows down while swirling around the waste receiving surface 14, and flows into the drain trap pipe 8 from the inlet 8a of the drain trap pipe 8. This causes a siphon action in the drain trap pipe 8, and the waste is discharged. After the siphon action ends, the level of the accumulated water W falls to the seal-breaking level L3, and the accumulated water W is almost gone (see Figure 2). After the siphon action ends, flush water is discharged from the rim spout 10, and the accumulated water W returns to the specified water level L1. The toilet flush is completed at t8, and the user leaves the toilet room at t9.

[0044] Next, the effects (operations) of the flush toilet apparatus 1 according to the embodiment of the present invention will be explained.

[0045] According to the flush toilet device 1 of this embodiment, when the control unit 50 receives a urine volume measurement start signal, it activates the opening and closing device 46 to close the internal flow path 21, and causes the air pressure P in the closed space S of this internal flow path 21 to act on the surface of the accumulated water W in the drain trap pipe 8, so that when the user urinates, the level of the accumulated water W in the bowl section 6 can be raised without the accumulated water W exceeding the top 8e of the drain trap pipe 8. This makes it possible to accurately measure urine volume when water is being saved.

[0046] Furthermore, the flush toilet device 1 of this embodiment has a toilet seat device 4 that includes a main body 32, a cleaning nozzle 34 that is movable forward and backward from the main body 32 and sprays cleaning water, and a toilet seat that is rotatably attached to the main body 32 and placed on the top surface of the toilet main body 2, and since the urine volume measuring device 40 is provided in the toilet seat device 4, the urine volume measuring device 40 can be attached to an existing toilet by simply replacing the toilet seat device 4 without changing the toilet main body 2.

[0047] According to the flush toilet device 1 of this embodiment, the opening and closing device 46 is provided in the drain socket 20, so the opening and closing device 46 can be installed on an existing toilet by simply replacing the drain socket 20 without changing the toilet body 2.

[0048] Furthermore, according to the flush toilet device 1 of this embodiment, the urine volume measuring device 40 is provided in the drain socket 20, so the urine volume measuring device 40 can be installed on an existing toilet simply by replacing the drain socket 20 without changing the toilet body 2.

[0049] The flush toilet device 1 of this embodiment has a flush start switch 52 for starting toilet flushing, and a measurement start switch 54 for starting urine volume measurement; when the measurement start switch 54 is operated, the control unit 50 activates the opening and closing device 46 to close the internal flow path 21, and then activates the urine volume measuring device 40 to start urine volume measurement, ensuring that urine volume measurement can be carried out reliably.

[0050] Furthermore, with the flush toilet device 1 of this embodiment, when the flush start switch 52 is operated, the control unit 50 activates the opening and closing device 46 to open the internal flow path 21, and then begins toilet flushing, ensuring that toilet flushing can be carried out reliably.

[0051] The present invention is not limited to the above-described embodiments, and various changes and modifications are possible within the scope of the technical concept described in the claims. [Explanation of symbols]

[0052] 1: Flush toilet device 2: Toilet bowl body 4: Toilet seat device 6: Bowl section 8: Drain trap pipe 8a: Inlet of drain trap pipe 8b: Inlet pipe for drain trap pipe 8c: Drain trap pipe riser 8d: Downstream pipe of drain trap pipe 8e: Top of drain trap pipe 20: Drainage socket 21: Internal flow path 40: Urine volume measuring device 42: First water level detection sensor 44: Second water level detection sensor 46: Switchgear 46a: Rotating axis 46b: Valve body 48: Make-up water device 50: Control unit 52: Cleaning start switch 54: Measurement start switch L0: Initial water level L1: Standard water level L2: Rising water level L3: Breaking water level W:Retained water P: Pressure S: Closed space

Claims

1. A flush toilet device that measures the amount of urine a user produces, a bowl portion for receiving urine from the user; a drain trap pipe provided at the bottom of the bowl portion and including an ascending pipe extending upward, a descending pipe extending downward from the ascending pipe, and a top portion located between the descending pipe and the ascending pipe and defining a specified water level of the accumulated water; a drain socket for connecting the downstream end of the drain trap pipe to a drain pipe; a urine volume measuring device that measures the amount of urine based on the rise in the water level of the accumulated water in the bowl portion; an opening and closing device provided in the drain trap pipe or the drain socket for closing or opening an internal flow path of the drain trap pipe or the drain socket; a control unit that controls the urine volume measuring device and the opening and closing device based on a urine volume measurement start signal; and A flush toilet apparatus characterized in that, when the control unit receives a signal to start the urine volume measurement, it activates the opening and closing device to close the internal flow path, and causes the air pressure in the closed space of this internal flow path to act on the accumulated water.

2. a toilet seat device including a main body, a cleaning nozzle that is provided so as to be able to advance and retreat from the main body and that sprays cleaning water, and a toilet seat that is rotatably attached to the main body and that is placed on the upper surface of the toilet body; 2. The flush toilet apparatus according to claim 1, wherein the urine volume measuring device is provided in the toilet seat apparatus.

3. The flush toilet apparatus according to claim 1 or 2, wherein the opening and closing device is provided in the drain socket.

4. 2. The flush toilet apparatus according to claim 1, wherein the urine volume measuring device is provided in the drain socket.

5. The toilet has a flush start switch for starting flushing the toilet bowl and a measurement start switch for starting urine volume measurement, The flush toilet apparatus according to claim 1, wherein when the measurement start switch is operated, the control unit activates the opening and closing device to close the internal flow path, and then activates the urine volume measuring device to begin urine volume measurement.

6. The flush toilet apparatus according to claim 5, wherein when the flush start switch is operated, the control unit activates the opening and closing device to open the internal flow path, and then starts toilet flushing.

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