JP2814643B2 - Flush toilet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Prior Art) Flush toilets are widely used. By operating a cistern ball tap or a flush valve (flush valve), a predetermined amount of flush water is supplied to the flush bowl, and the flush is performed.

(Problems to be Solved by the Invention) However, in the case of the conventional flush toilet, if a clogging occurs in the trap drainage channel or the like, it is difficult to confirm the clogging.・ If the washing water is supplied three times, the washing water may overflow from the bowl (toilet bowl).

The present invention has been made to solve such a problem, and an object of the present invention is to provide a flush toilet capable of detecting clogging of the flush toilet and displaying this to a user.

(Means for Solving the Problems) In order to solve the problems, the flush toilet according to claim 1 has a water level detecting means for detecting a water level in a bowl portion, and an output of the water level detecting means exceeds a preset value. A monitoring device that generates a signal when the signal is generated.

The flush toilet according to claim 2 includes a pressure sensor for detecting a pressure in the trap drainage channel, and a monitoring device for generating a signal when an output of the pressure sensor exceeds a preset value. And

The flush toilet according to claim 3 generates a signal when the pressure in the trap drainage channel detected by the pressure sensor does not reach a predetermined negative pressure value even though the flush water is supplied. A monitoring device is provided.

(Operation) The flush toilet according to claim 1 monitors the water level in the bowl portion, and when the water level exceeds a predetermined level, the monitoring device determines that clogging has occurred and displays this.

The flush toilet according to claim 2 monitors the pressure in the trap drainage channel. For example, clogging occurs on the downstream side of the trap drainage channel, the water level in the bowl portion rises, and the positive pressure applied to the pressure sensor is reduced. When it becomes high, the monitoring device detects this and performs display.

In the flush toilet according to claim 3, when the clogging occurs in the trap drainage channel, for example, on the upstream side, or when the flow rate necessary for generating the siphon action in the trap drainage channel due to the clogging in the trap drainage channel cannot be secured. For example, when the pressure in the trap drainage channel does not reach the predetermined negative pressure, the monitoring device determines that clogging has occurred and displays this.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

 FIG. 1 is a structural view of a flush toilet according to claim 1.

A flush toilet (hereinafter referred to as a toilet) 1 includes a bowl portion 3 partitioned by a partition wall 2 and a trap drainage channel 4. The trap drainage channel 4 is provided with an inlet 5 formed at the lower part of the rear wall of the bowl 3.
And an outlet 6 formed on the rear bottom surface of the toilet 1 are connected in a substantially inverted U-shape.

A rim water passage 8 is formed in the rim portion 7 at the upper peripheral edge of the bowl portion 3 so as to protrude inward of the bowl portion 3, and a rim water outlet 9 is formed on the bottom surface of the rim water passage 8 at appropriate intervals. Opened diagonally with respect to part 3. The rim water channel 8 communicates with a rim water supply room 10 at the rear.

A box 11 is provided at the upper rear of the toilet 1
A cleaning water supply device 12 and a monitoring device 13 are housed in 11.

Cleaning water supply device 12 is an electromagnetic on-off valve connected to water supply pipe 14.
15, an operation unit 16 with switches for large and small washing,
The water supply control unit 17 drives the electromagnetic on-off valve 15 to open for a predetermined time based on a cleaning start input from the operation unit 16. The downstream side of the solenoid on-off valve 15 is
Is connected to the rim water supply port 10a of the rim water supply chamber 10.

At a position facing the bowl portion 3 on the bottom surface of the rim water supply chamber 10 or at an appropriate position on the bottom surface of the rim portion 7, a water level detecting means 19 composed of an ultrasonic level meter is provided. This water level detecting means 19 is configured such that the ultrasonic wave transmitted from the ultrasonic
The height to the sealing surface is detected from the time until the light is reflected back on the surface of the sealing water 20 in the bowl portion 3. The water level detection output of the water level detection means 19 is the water level signal line 19a.
Is input to the monitoring device 13 via the. Note that the water level detecting means 19 may use light or the like other than ultrasonic waves.

Further, on the front side of the box 13, there is provided a display 21 such as a lamp and a light emitting diode for notifying a user that clogging has occurred based on an output from the monitoring device 13. Note that the display 21 may be audible display means such as a buzzer or a speaker.

FIG. 2 is a block diagram of a cleaning water supply device and a monitoring device.

The ON / OFF signals of the switches in the operation unit 16 are input to the chatter removal circuit 17a in the water supply control unit 17. The chatter removing circuit 17a is configured to remove chattering of each switch and output an H-level signal for a valid input. Each output of the chatter removal circuit 17 is input to timers 17d and 17e for large and small cleaning via AND circuits 17b and 17c, respectively. AND circuit 17
A cleaning permission signal 13a from the monitoring device 13 is input to the other input terminals of the b and 17c. When the cleaning permission signal 13a is at the L level, even if a cleaning start input is performed from the operation unit 16, each timer is activated. 17d and 17e are not activated.

Each of the timers 17d and 17e is configured to generate an H-level output for a preset time based on the rising of the output of each of the AND circuits 17b and 17c. Each timer 17d, 17e
Is input to a valve drive circuit 17g via an OR circuit 17f, and the output of the valve drive circuit 17g drives the opening and closing of the electromagnetic on-off valve 15.

The output of the water level detection means 19 is output via a water level signal line 19a.
The data is input to the interface circuit 13b in the monitoring device 13.
The interface circuit 13b is configured to generate a voltage output corresponding to the water sealing height based on the output of the water level detecting means 19. The output of the interface circuit 13b is input to the comparison input terminal 13d of the comparison circuit 13c. The reference voltage is input to the reference input terminal 13e of the comparison circuit 13c from the reference voltage generation circuit 13f. This comparison circuit 13c has a comparison input terminal 13d
Is lower than the potential of the reference voltage input terminal 13e,
When an H-level output is generated at the first output terminal 13g and an L-level output is generated at the second output terminal 13h, and the potential of the comparison input terminal 13d is equal to or higher than the potential of the reference input terminal 13e, , An L-level output at the first output terminal and an H-level output at the second output terminal 13h.

The first output terminal 13g is connected to the input terminals of the AND circuits 17b and 17c in the water supply control unit 17. 2nd output terminal 13h
Are connected to respective input terminals of the display drive circuit 13i and the audio frequency oscillation circuit 13j. Then, when the second output terminal 13h becomes H level, a display device for performing a visible display of, for example, a lamp, a light emitting diode, etc.
In addition to turning on or blinking the display 21, the audio frequency oscillation circuit 13 j is set to an oscillating operation state and an audible display means 22 such as a speaker generates an alarm sound.

The output voltage of the reference voltage generating circuit 13f is set such that the output of the comparison circuit 13c is inverted when the water level of the sealed water rises and the height of the sealed water reaches a position several cm below the bottom surface of the rim portion 7. doing.

In the embodiment shown in FIG. 2, the input from the operation unit 16 is not accepted by the signal from the first output terminal 13g of the comparison circuit 13c, but the timer 17d, A configuration in which the cleaning water supply is stopped by switching the operation of the valve driving circuit 17e to the forced stop state or stopping the operation of the valve drive circuit 17g may be adopted. Further, the comparison circuit 13c may be configured to keep its output state until a reset signal (not shown) is applied after detecting the rise in the water sealing height.

With the above configuration, when the clogging of the trap drainage channel 4 with dirt or the like occurs and the sealing water height in the bowl portion 3 increases, this is detected by the monitoring device 13 and the indicator 21
Is visually displayed. In the case where a visible display means 22 such as a speaker is provided, an alarm sound is generated.

FIG. 3 is a structural view of a flush toilet according to claims 2 and 3.

The flush toilet 51 shown in FIG. 3 is provided with a pressure sensor 52 for detecting the pressure in the trap drainage channel 4 in the trap drainage channel 4 and a monitor for detecting the occurrence of clogging based on the detection output of the pressure sensor 52. A device 53 is provided.
The structure of the toilet bowl 51 is the same as that of the toilet bowl 1 shown in FIG. 1, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

 FIG. 4 is a block diagram of the monitoring device.

The monitoring device 53 is a one-chip microcomputer (hereinafter referred to as a one-chip microcomputer).
The monitoring device 53 has a function of water supply control.

Each switch of the operation unit 16 is connected to each input port 61a, 61b of the CPU 61.
And the valve opening signal output to the output port 61c of the CPU 61 is input to the valve drive circuit 62 to drive the electromagnetic on-off valve 15.

The pressure sensor 52 uses a semiconductor pressure sensor, and its detection output is connected to a DC amplifier 6 in the monitoring device 53 through a sensor connection line 52a.
After being amplified in step 3, the signal is input to the A / D converter 64. The conversion output of the A / D converter 64 is configured to be input to the CPU 61 via the bus 61d. Further, the display control of the display device 21 is performed via the display device drive circuit 65 by the output port 61e of the CPU 61.

Next, the operation of the monitoring device 53 will be described with reference to the flowchart of FIG.

In the ROM or RAM in the CPU 61, the data relating to the water supply time for large and small water, the data relating to the negative pressure when the siphon action occurs in the trap drain 4 and the trap drain 4 are clogged. Data relating to the positive pressure in the trap drainage channel 4 when the height of the sealing water 20 rises abnormally is stored in advance.

When a cleaning start input is given from the operation unit 16 (S1), the CPU 61 in the monitoring device 53 sends the electromagnetic opening / closing valve 1 via the valve driving circuit 62.
5 is driven to the valve open state (S2). Next, the CPU 61 reads data relating to the pressure in the trap drain 4 at a predetermined cycle via the A / D converter 64, and monitors the pressure fluctuation in the trap drain 4 (S3 to S5). Then, when a predetermined valve opening time has elapsed (S6), the electromagnetic on-off valve 15 is closed (S7).

In step S4, when the pressure in the trap drainage channel 4 reaches the data relating to the positive pressure stored in advance, the display 21 is turned on via the display driving circuit 65 to notify that the clogging has occurred. A visual display is made (S8), and the water supply is stopped by immediately driving the electromagnetic on-off valve 15 to the closed state (S7).

In step S5, if the pressure in the trap drainage channel 4 does not reach the data on the negative pressure stored in advance even after a predetermined time has elapsed since the start of water supply, the indicator 21 is turned on (S8). Then, the water supply is immediately stopped (S7).

Although each embodiment has described the siphon type toilet, the present invention is also applicable to a flush type toilet such as a siphon jet type toilet or a siphon vortex type toilet equipped with a jet nozzle.

(Effect of the Invention) As described above, in the flush toilet according to the present invention, when the water level in the bowl portion becomes higher than the normal water level due to clogging, or when the flush water is supplied, the pressure in the trap drainage channel becomes a predetermined value. When the negative pressure value does not reach (when the complete siphon effect has not occurred), this can be detected and displayed. Therefore, it is possible to promptly notify the user of the occurrence of clogging at a location that cannot be directly viewed, such as inside the trap drainage channel.

[Brief description of the drawings]

FIG. 1 is a structural view of a flush toilet according to claim 1, FIG. 2 is a block diagram of a flush water supply device and a monitoring device, FIG. 3 is a structural view of a flush toilet according to claims 2 and 3, FIG. FIG. 4 is a block diagram of the monitoring device, and FIG. 5 is a flowchart showing the operation of the monitoring device. 1,51 ... flush toilet, 3 ... bowl, 4 ... trap drainage channel, 12 ... flush water supply device, 13,53 ... monitoring device, 15
…… Electromagnetic on-off valve, 16 …… Operation part, 19 …… Water level detection means,
21 ... Display.

Continuation of the front page (72) Inventor Shinji Shibata 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kikai Co., Ltd. Chigasaki Factory (72) Inventor Noboru Niihara 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture East (56) References JP-A-1-287331 (JP, A) JP-A-2-20739 (JP, A) JP-A-1-287334 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) E03D 11/02 E03D 5/10

Claims (3)

(57) [Claims] A flush toilet comprising a water level detecting means for detecting a water level in a bowl portion, and a monitoring device for generating a signal when an output of the water level detecting means exceeds a preset value. . 2. A flush toilet comprising a pressure sensor for detecting pressure in a trap drainage channel and a monitoring device for generating a signal when an output of the pressure sensor exceeds a preset value. . 3. A pressure sensor for detecting the pressure in the trap drainage channel, and the pressure in the trap drainage channel is set to a predetermined negative pressure value even though the output of the pressure sensor is monitored to supply washing water. A flush toilet characterized by comprising a monitoring device for generating a signal when the temperature is not reached.