JP2005290796A - Toilet bowl washing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet bowl washing device which carries out both human body detection and urine detection and prevents erroneous operation due to shaking of sealing water during detection of the human body. <P>SOLUTION: Washing water is supplied to a toilet bowl where the sealing water is formed in a drainage part in the toilet bowl washing device. The toilet bowl washing device comprises a detection means for carrying out a first detection operation which detects Doppler effect by radiating a radio wave directed to a first direction where the shaking of the sealing water is not substantially detected and a second detection operation which detects Doppler effect by radiating a radio wave directed to a second detection where the shaking of the sealing water is substantially detected; and a control means for controlling supply of the washing water based on at least one of the detection results of the first and second detection operations. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a toilet bowl cleaning apparatus, and more particularly, to a toilet bowl cleaning apparatus that is equipped with a Doppler sensor using radio waves such as microwaves and that enables control of cleaning water and the like.

  The flush toilet is cleaned by manual washing by the user's button operation, etc., or by automatic washing that automatically flows clean water or medium water when the use of the toilet is completed when the person is standing in front of the toilet. The degree is maintained. In order to realize automatic cleaning, a sensor for detecting the presence of the user and the state of the water flow is required. In contrast, the present inventors have developed a toilet cleaning device using a Doppler sensor using radio waves (for example, Patent Document 1).

By using a Doppler sensor that uses radio waves, the appearance of the toilet is made clear, and it is possible to detect not only the presence of the user but also the use state or cleaning state of the toilet with high sensitivity.
Furthermore, in the toilet bowl cleaning system disclosed in Patent Document 1, the urine release time is detected using a Doppler sensor, and cleaning with cleaning water containing silver ions can be performed based on this data.
JP 2003-184153 A

In the flush toilet, a trap part is provided in a path through which excrement received by the ball part is discharged to the drainage channel, and water is stored therein. This stored water is called “sealed water”, and this sealed water prevents the entry of dirty gas and pests from the drainage channel into the room. However, the water level of the sealed water fluctuates due to fluctuations in the pressure in the drain pipe due to drainage from other toilets and the like.
As a result of further investigations by the inventor of the present invention, it has been found that a Doppler sensor using radio waves has high detection sensitivity, and therefore detects even the “sealing” of the trap portion of the flush toilet. However, since the frequency of shaking of the sealed water is close to the frequency band that is a target for human body detection, it is difficult to distinguish these. That is, the human body detection signal may be erroneously output due to the shaking of the sealed water. In order to avoid this problem, if the Doppler sensor is directed in a direction different from the sealed water, there arises a problem that it becomes difficult to detect urine.

  The present invention has been made on the basis of recognition of such a problem, and an object of the present invention is to provide a toilet bowl cleaning device that achieves both human body detection and urine detection and prevents malfunction due to shaking of the sealed water during human body detection. It is to provide.

  In order to achieve the above object, according to one aspect of the present invention, there is provided a toilet flushing device that supplies flush water to a toilet in which sealed water is formed in a drainage portion, and does not substantially detect shaking of the sealed water. A first detection operation for detecting a Doppler effect by emitting a radio wave directed in a first direction; and a Doppler effect by emitting a radio wave directed in a second direction that can substantially detect the shaking of the sealed water. Detection means capable of performing detection, control means for controlling the supply of the cleaning water based on at least one of the detection results of the first and second detection operations, A toilet bowl cleaning device is provided.

  In the first detection operation, it is possible to detect the operation of the non-detecting body that forms a Doppler signal having a frequency component approximated to it without detecting the fluctuation of the sealed water, and in the second detection operation, the sealed water The motion of a non-detecting body that forms a Doppler signal having a frequency component different from that can be detected.

  Here, if the detection means includes a first Doppler sensor for executing the first detection operation and a second Doppler sensor for executing the second detection operation, two Doppler sensors are provided. By switching and using the sensor, the first and second detection operations can be reliably performed.

  Alternatively, the detection means includes a first antenna, a second antenna, and a phase shifter that makes a phase difference between radio waves emitted from the first and second antennas variable, If the first detection operation and the second detection operation can be selectively executed by switching the phase difference of the radio wave by a phase shifter, the first detection operation and the first detection operation can be performed by one sensor. The second detection operation can be executed, and a compact system can be constructed.

  According to another aspect of the present invention, there is provided a toilet bowl cleaning device for supplying flush water to a toilet bowl, wherein the first antenna, the second antenna, and the first and second antennas respectively emit light. A phase shifter that makes the phase difference of the received radio wave variable, and detecting the Doppler effect by emitting the radio wave directed in the first direction by switching the phase difference of the radio wave by the phase shifter Detection means capable of selectively executing a first detection operation to detect and a second detection operation to emit a radio wave directed in a second direction different from the first direction to detect the Doppler effect; And a control means for controlling the supply of the wash water based on the detection result of the detection means.

  By using detection means that can detect the Doppler effect by directing it in two different directions, it is possible to construct a compact system capable of detection that eliminates the operating speed of the non-detecting body and surrounding disturbances.

  Here, the phase shifter can change the line length if at least one of the line length connected to the first antenna and the line length connected to the second antenna is variable. By switching, the first and second detection operations can be performed reliably and easily.

  Further, if the human body is detected in the first detection operation and the urine flow is detected in the second detection operation, the human body is affected by disturbance such as shaking of the sealed water. In addition, urine flow can be detected with high sensitivity.

  A first filter / amplifying unit that passes a signal in the first frequency band and amplifies the signal with a first amplification factor; and a signal in a second frequency band that has a lower lower limit than the first frequency band. A second filter / amplifying means for amplifying with a second amplification factor, determining a detection result obtained by the first detection operation via the first filter / amplifying means, If the detection result obtained by the second detection operation is determined through the first filter / amplification unit and the second filter / amplification unit, the operation speed in the first detection operation is The operation of the relatively non-detecting body can be reliably detected, and in the second operation, the operation of the non-detecting body having a relatively high operating speed can be reliably detected.

  Further, the toilet is a toilet bowl, the detection means is provided in an upper part of the toilet toilet body, the first direction is a direction toward the front of the toilet bowl, If the direction 2 is substantially vertically downward, the human body can be detected with high accuracy by the first detection operation, and the urine volume can be detected with high sensitivity by the second detection operation.

  Further, if the control means changes the total flow rate of the wash water based on the detection result obtained by the second detection operation, the wash water is optimized according to the urine load on the toilet. It is possible to keep the toilet bowl clean while maintaining the water-saving effect.

  ADVANTAGE OF THE INVENTION According to this invention, the toilet bowl washing | cleaning apparatus which made compatible the detection of a human body and the detection of urine, and prevented the malfunctioning by the shaking of a sealing water in the case of a human body detection can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic diagram showing the main configuration of the toilet bowl cleaning apparatus according to the first embodiment of the present invention. That is, the toilet bowl cleaning device of the present embodiment can be attached to, for example, a boy's small flush toilet 600.

  The toilet bowl cleaning apparatus of the present embodiment includes a first Doppler sensor 10A, a second Doppler sensor 10B, and a control unit 100. These Doppler sensors 10 </ b> A and 10 </ b> B are provided above the bowl surface of the toilet 600, and can detect the operation of the object by transmitting radio waves in different directions as illustrated by arrows A and B, respectively. The radio waves transmitted and received by the Doppler sensors 10 </ b> A and 10 </ b> B pass through the pottery constituting the toilet 600. For this reason, these Doppler sensors 10A and 10B do not need to be exposed to the outside of the toilet 600, and can be accommodated inside the toilet 600, so that the appearance can be kept very clean. Further, for example, “mischief” such as shielding the sensor surface with gum can be prevented.

  The operations of the Doppler sensors 10A and 10B are controlled by the control unit 100. Further, the valve 550 provided in the water supply channel 500 is opened and closed by a control signal output from the control unit 100. As the valve 550, for example, a latching solenoid valve or the like can be used. The washing water that has flowed into the toilet bowl 600 by the opening operation of the valve 550 is drained into the drainage channel 700. And the sealing water 650 for interrupting | blocking the airflow which has the odor from the drainage channel 700 is formed in the drain outlet of the toilet bowl 600. FIG.

2 and 3 are schematic views illustrating the operation of the toilet bowl cleaning device of this embodiment.
That is, in the standby state, as shown in FIG. 2, the first Doppler sensor 10 </ b> A can transmit a radio wave in the direction of arrow A, that is, in front of the toilet 600 to detect the approach of the user. When the user 900 approaches the toilet 600, it is detected by the Doppler sensor 10A, and the detection signal is transmitted to the control unit 100.

Here, the surface of the sealing water 650 formed at the drainage port of the toilet 600 is, for example, due to a change in pressure due to opening / closing of a door of a room in which the toilet 600 is disposed, a change in pressure in the drainage channel 700, or the like. May shake.
On the other hand, in the present embodiment, the first Doppler sensor 10A transmits a detection radio wave in the direction of the arrow A, that is, in front of the toilet 600, and therefore detects the shaking of the sealed water 650. There is no. That is, it is possible to prevent the human body detection signal from being erroneously output due to the shaking of the sealing water 650.

  When the first Doppler sensor 10 </ b> A detects the approach of the user 900, the detection signal is output to the control unit 100. Then, the control part 100 starts the detection by the 2nd Doppler sensor 10B, as represented to FIG. The radio wave emitted from the second Doppler sensor 10B is transmitted in the direction of arrow B, that is, substantially downward in the toilet 600. Therefore, a vector component parallel to the propagation direction of the radio wave can be detected by the Doppler effect among the velocity vectors of urine flow and washing water.

  By detecting the urine flow in this way, it is possible to determine the optimum timing for flowing the wash water. That is, the wash water can be flowed at a predetermined time difference from the time when the urine flow is completed.

  Further, by detecting the speed and duration of the urine flow, the urine load applied to the toilet 600 can be determined as disclosed in Patent Document 1. Based on the determination result, for example, the amount of cleaning water can be optimized by adjusting the opening / closing time of the valve 550. That is, when the amount of urine is large, the amount of wash water is increased, and when the amount of urine is small, the amount of wash water is decreased to minimize the consumption of wash water, while the toilet 600 Can always be kept clean.

  Further, for example, by controlling the operation of a sterilization system such as a silver ion water generator (not shown) based on the determination result of the urine load, the toilet 600 can be cleaned while preventing wasteful consumption of power consumption and silver electrodes. It can be maintained in a state.

  Furthermore, the flow rate of the cleaning water can be controlled by monitoring the flow of the cleaning water with the second Doppler sensor 10B. That is, the flow rate of the wash water can be measured by the second Doppler sensor 10, and the flow rate can be determined from this flow rate. Then, the valve 550 can be closed when a predetermined flow rate flows. In this way, for example, even when the water supply pressure in the water supply channel 500 fluctuates, it is possible to always flow an optimal amount of cleaning water.

  Alternatively, even when the cleaning water is allowed to flow due to a failure of the valve 550 or the like, the second Doppler sensor 10B can detect this and issue an alarm.

  Note that the Doppler sensors 10A and 10B may be alternately switched at regular time intervals. For example, the Doppler sensors 10A and 10B may be alternately switched and monitored at intervals of 0.1 second to several seconds.

  In any case, the signal at the moment of switching the Doppler sensors 10A and 10B or immediately after that may be ignored. That is, when the sensor is switched, pulse noise or the like may be detected. If this is masked, false detection can be suppressed.

On the other hand, if the sensor switching state, that is, which sensor is used is displayed or signal output is made, the operation state can be easily confirmed, which is convenient for system maintenance and inspection.
Furthermore, when the power is turned on, if the sensor is switched so as to be directed in front of the toilet bowl, malfunctions are unlikely to occur in many cases.

FIG. 4 is a schematic view illustrating the configuration of Doppler sensors 10A and 10B that can be used in the present embodiment.
That is, the Doppler sensors 10 </ b> A and 10 </ b> B include an oscillating unit 12, a low-pass filter (LPF) 14, an antenna 16, and a mixer 18.

  For example, the oscillation unit 12 outputs an alternating signal of 10.525 GHz (gigahertz). The low pass filter (LPF) 14 blocks unnecessary high frequency components from the signals from the oscillating unit 12 and the antenna 16. Unnecessary high-frequency components are likely to occur at frequencies that are twice, three times, and so on, which should be originally transmitted. The antenna 16 transmits a radio wave such as a microwave corresponding to the alternating signal output from the oscillating unit 12 and receives a reflected wave of the radio wave. The mixer 18 calculates and outputs the difference between the reception signal received by the antenna 16 and the transmission signal from the oscillation unit 12.

For example, a radio wave TW is transmitted from the antenna 16, and a detected object S such as a user or a urine flow approaches the propagation direction of the radio wave TW at a speed V, and the radio wave RW reflected by the detected object S is transmitted to the antenna 16. The case of receiving by will be described.
In this case, the frequency of the reflected radio wave RW is shifted by the Doppler effect. When the frequency of the transmission radio wave TW is Ft, the frequency of the reception radio wave RW is Fr, and the speed of light is C, the difference signal (Doppler signal) ΔF obtained in the mixer 18 is expressed by the following equation.

ΔF = Ft−Fr = 2 × Ft × V / C

Thus, by detecting the Doppler signal ΔF, the detection object S, that is, the user 900 and the velocity V of the urine flow can be measured.

FIG. 5 is a schematic view illustrating the configuration of the control unit 100.
The control unit 100 includes a first filter / amplifier 110, a second filter / amplifier 120, a CPU (Central Processing Unit) 130, and a valve drive circuit 140.
The CPU 130 controls the operation of the first and second Doppler sensors 10A and 10B, and controls the operation of the valve drive circuit 140 based on the output from them.
The output from the first Doppler sensor 10 </ b> A is filtered and amplified in the first filter / amplifier 110. In the first filter / amplifier 110, for example, only a frequency of 10 to 100 Hz is passed, and the signal is amplified about 25 times. The output from the second Doppler sensor 10B is filtered and amplified in the second filter / amplifier 120. In the second filter / amplifier 120, for example, only a frequency of 100 to 200 Hz is passed, and the signal is amplified about 1000 times.

  The output from the first Doppler sensor 10A that detects the approach of the user is input to the CPU 130 via the first filter / amplifier 110 and determined. For example, when 10.525 GHz is used as the frequency of the transmission radio wave TW and the approach speed of the user is 0.14 meter per second, the frequency of the Doppler signal ΔF is about 10 Hz. In the CPU 130, for example, a low-pass filtering process with an upper limit of 40 Hz is performed, and the approach of the user can be determined. At this time, the sealing water 650 of the toilet 600 may also swing at a speed that approximates the approaching speed of the user. However, since the first Doppler sensor 10A monitors the front space of the toilet 600, the sealing water 650 is sealed. The shaking of the water 650 is not erroneously detected.

  On the other hand, the output from the second Doppler sensor 10B that detects the urine flow is filtered and amplified by the second filter / amplifier 120. In the second filter / amplifier 120, for example, only the frequency of 100 to 200 Hz is passed, and the signal is amplified about 1000 times. Since the urinary flow has a relatively small scattering cross section for radio waves, it is necessary to amplify the signal more than the first filter / amplifier 110 and to exclude the low frequency signal to increase the S / N ratio.

  That is, the second Doppler sensor 10B may detect the operation of the user 900 and the shaking of the sealed water 650. In contrast, the second filter / amplifier 120 removes low frequency components corresponding to these movements.

  The urine flow rate is about 1.4 to 2.4 meters per second. When 10.525 GHz is used as the frequency of the transmission radio wave TW, the frequencies of the corresponding Doppler signals ΔF are 100 Hz and 180 Hz, respectively.

The CPU 130 determines the speed and duration of the urine flow based on the output from the second filter / amplifier 120. Then, based on this determination result, the operation of the valve drive circuit 140 is controlled so that an optimal amount of washing water flows at an optimal timing.
As described above, according to the present embodiment, by using two Doppler sensors that monitor different directions, it is possible to prevent a malfunction due to a shaking of the sealed water, and to approach the user and urine flow or washing water. Each flow can be detected.

(Second Embodiment)
Next, as a second embodiment of the present invention, a toilet cleaning device using a Doppler sensor with a variable directivity will be described.
FIG. 6 is a schematic diagram illustrating a main part of the toilet bowl cleaning device according to the present embodiment. 6 and the subsequent drawings, the same elements as those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description thereof will be omitted.
In the present embodiment, a Doppler sensor 10C is provided that is provided on the upper side of the bowl surface of the toilet 600 and that can switch the directing direction, that is, the radio wave transmission direction as indicated by arrows A and B.

FIG. 7 is a schematic diagram showing a main part configuration of a Doppler sensor 10C used in the present embodiment.
The Doppler sensor 10 </ b> C includes first and second antennas 16 </ b> A and 16 </ b> B, and a phase shifter 15 is provided between these antennas and the LPF 14. The phase shifter 15 is capable of switching transmission lines having different line lengths for each antenna. That is, for the antenna 16A, either the transmission line A1 or A2 is connected by the switching unit 15A. The transmission line A2 has a longer line length than the transmission line A1, and can delay the phase of the propagation wave. Similarly, for the antenna 16B, one of the transmission lines B1 and B2 is connected by the switching unit 15B. Here again, the transmission line B2 has a longer line length than the transmission line B1, and can delay the phase of the propagation wave.

FIG. 8 is a schematic diagram showing a cross-sectional structure of the Doppler sensor 10C.
FIG. 9A is a plan view seen from the antenna surface, and FIG. 9B is a front view thereof.
The Doppler sensor 10 </ b> C is sealed by the shield case 20 and the substrate 22. On the substrate 22, the oscillator 12, the LPF 14, the phase shifter 15, the mixer 18, and the like are mounted. A substrate 26 serving as an antenna surface is laminated on the back surface side of the substrate 22 via a ground layer 24. These substrates are provided with through holes 28A and 28B, through which the signal line 30 and the antennas 16A and 16B are connected, respectively.
As shown in FIG. 9, the antennas 16A and 16B are formed on the surface of the substrate 26 as a pair of conductive patterns.
FIG. 10 is a schematic diagram for explaining the radiation direction of radio waves by the phase shifter 15.
That is, when power is supplied to the antenna 16A and the antenna 16B in the same phase, the radio wave main beam is radiated in a direction perpendicular to the antenna surface 26A as shown in FIG. In this case, the phase shifter 15 shown in FIG. 7 may supply power to the antennas 16A and 16B via the transmission lines A1 and B1, respectively.

  Next, when the phase of power feeding to the antenna 16A is delayed from the phase of power feeding to the antenna 16B, the main beam is tilted in the direction of the antenna 16A as shown in FIG. That is, the radio wave radiated from the antenna 16B travels faster than the radio wave radiated from the antenna 16A. For this purpose, for example, the transmission lines A2 and B1 may be selected in the phase shifter 15 shown in FIG.

  Conversely, when the phase of power feeding to the antenna 16B is delayed from the phase of power feeding to the antenna 16A, the main beam is tilted in the direction of the antenna 16B as shown in FIG. That is, the radio wave radiated from the antenna 16A travels faster than the radio wave radiated from the antenna 16B. For this purpose, for example, the transmission lines A1 and B2 may be selected in the phase shifter 15 shown in FIG.

ここで、λ₀は、真空中での電波の波長であり、光速をｃ、周波数をｆとすると、次式の関係が成立する。

λ₀＝ｃ／ｆ

光速ｃを３×１０^８ｍｍ／秒、周波数ｆを１０．５２５ＧＨｚとすると、波長λ₀は次式の如くである。

λ₀＝３×１０^８／１０．５２５×１０^９
≒２８．５ｍｍ

従って、（１）式に代入すると、電波の位相差は、次式により表される。

この電波の位相差を生じさせるためには、伝送線路において次式により表される位相差を設ければよい。

ここで、λ_gは、伝送線路における伝搬波の波長であり、伝搬波の真空中の波長λ_０ と、伝送線路が形成されている基板（アンテナ基板２６）の比誘電率εrとを用いて次式により表される。

λ_g＝λ_０／（εr）^1/2 （３）

（３）式を（２）式に代入すれば、伝送線路において必要とされる線路長差が得られる。例えば、アンテナ基板２６の材料として、比誘電率εrが４．８のガラスエポキシ基板を用いた場合には、線路長差は次式の如くである。

つまり、伝送線路Ａ１とＢ２、あるいは伝送線路Ａ２とＢ１との間で、５．７ミリメータの線路長差があれば、図１０（ｂ）あるいは（ｃ）の如く、電波のメインビームをアンテナ面２６Ａの垂線に対して約３０°傾斜させることができる。 As a specific example, when the distance W between the centers of the antennas 16A and 16B is 14.3 millimeters and the main beam is inclined by 30 ° from the direction perpendicular to the antenna surface 26A, the radio waves radiated from the antenna 16B are in the air. Thus, the distance L = (14.3 × cos 30 °) should be advanced faster by millimeters. For this purpose, the radio waves radiated from the antennas 16A and 16B may have a phase difference expressed by the following equation in the air.

Here, λ ₀ is the wavelength of the radio wave in vacuum, and the relationship of the following equation is established, where c is the speed of light and f is the frequency.

λ ₀ = c / f

When the speed of light c is 3 × 10 ⁸ mm / second and the frequency f is 10.525 GHz, the wavelength λ ₀ is as follows.

λ ₀ = 3 × 10 ⁸ /10.525×10 ⁹
≒ 28.5mm

Therefore, when substituting into the equation (1), the phase difference of the radio wave is expressed by the following equation.

In order to generate the phase difference of the radio wave, a phase difference represented by the following equation may be provided in the transmission line.

Here, λ _g is the wavelength of the propagation wave in the transmission line, using the wavelength λ ₀ of the propagation wave in vacuum and the relative dielectric constant εr of the substrate (antenna substrate 26) on which the transmission line is formed. It is expressed by the following formula.

λ _g = λ ₀ / (εr) ^1/2 (3)

By substituting equation (3) into equation (2), the line length difference required for the transmission line can be obtained. For example, when a glass epoxy substrate having a relative dielectric constant εr of 4.8 is used as the material of the antenna substrate 26, the line length difference is as follows.

In other words, if there is a line length difference of 5.7 millimeters between the transmission lines A1 and B2 or between the transmission lines A2 and B1, as shown in FIG. It can be tilted about 30 ° with respect to the normal of 26A.

  As described above, in the present embodiment, the direction of the main beam emitted from the antenna can be changed by appropriately switching the transmission line in the phase shifter 15.

11 and 12 are schematic views illustrating the operation of the toilet bowl cleaning device of this embodiment.
That is, in the normal standby mode, by switching the phase shifter 15 of the Doppler sensor 10C, a beam is emitted toward the front of the toilet 600 as indicated by an arrow A in FIG. To do. At this time, the Doppler sensor 10 </ b> C does not erroneously detect the shaking of the seal water 650 of the toilet 600.

  When the user 900 is detected, the phase shifter 15 of the Doppler sensor 10C is switched, and radio waves are radiated substantially vertically downward in the toilet 600 as indicated by an arrow B in FIG. In this way, it is possible to detect the urine flow and the washing water flow with high sensitivity.

  FIG. 13 is a schematic view illustrating the configuration of the control unit 100 of the toilet bowl cleaning device of this embodiment.

The control unit 100 includes a first filter / amplifier 110, a second filter / amplifier 120, a CPU (Central Processing Unit) 130, and a valve drive circuit 140 in the same manner as described above with reference to FIG. 5.
In the present embodiment, the output from the Doppler sensor 10 </ b> C is input in series to the first filter / amplifier 110 and the second filter / amplifier 120. In the first filter / amplifier 110, for example, only a frequency of 10 to 200 Hz is passed, and the signal is amplified about 25 times. In the second filter / amplifier 120, for example, only the frequency of 100 to 200 Hz is passed, and the signal is further amplified by about 40 times.

  The output of the first filter / amplifier 110 is input to the CPU 130 as the human body detection output 112. The output of the second filter / amplifier 120 is input to the CPU 130 as the water flow detection output 122.

  As shown in FIG. 11, in the standby mode, the CPU 130 controls the phase shifter 15 of the Doppler sensor 10 </ b> C to emit radio waves in the direction of the arrow A. Then, by monitoring the output 112 from the first filter / amplifier 110, a change in the signal in the frequency band corresponding to the operation of the user 900 is detected.

When detecting the user 900, the CPU 130 switches the phase shifter 15 of the Doppler sensor 10C to emit radio waves in the direction of arrow B in FIG. Then, by monitoring the output 122 from the second filter / amplifier 120, a change in the signal in the frequency band corresponding to the urine flow or the water flow of the washing water is detected. Then, based on this determination result, the operation of the valve drive circuit 140 is controlled so that an optimal amount of washing water flows at an optimal timing.
FIG. 14 is a graph and timing chart illustrating the results of an experiment conducted by the present inventor.
That is, FIG. 5A shows the output waveform of the output 112 of the first filter / amplifier 110 in the toilet bowl cleaning apparatus of the present embodiment, and FIG. 5B shows the output waveform of the output 122 of the second filter / amplifier 120. Represents.

When the user 900 approaches, a low frequency signal fluctuation occurs corresponding to the operation. As shown in FIG. 14A, at the output of the first filter / amplifier 110, a low-frequency Doppler signal corresponding to the movement of the user 900 appears entirely in the period T1. Since the intensity of the reflected wave from the user 900 is relatively high, the amplitude of the Doppler signal is also large.
Further, as shown in FIG. 14C, while the direction of the sensor is set to the front (the direction of arrow A in FIG. 11), the shaking of the toilet seal water 650 is not detected. Until the user is detected, the amplitude of the signal is very small.

  When the approach of the user 900 is detected at the timing shown in FIG. 14D, the directivity direction of the sensor can be switched from the front to the bottom as shown in FIG. 14C.

  When the sensor is directed downward (in the direction of arrow B in FIG. 12), urine flow can be detected in addition to the movement of the user and the shaking of the sealing water 650. As shown in FIG. 14A, a signal having a high frequency and a small amplitude appears in the period T2 so as to be superimposed on a signal having a large low-frequency amplitude corresponding to the movement of the user or the shaking of the sealed water 650. This is a high frequency component Doppler signal due to urine flow. Since the intensity of the reflected wave from the urine flow is not so high, a signal of a high frequency component due to the urine flow is not clear at the output of the first filter / amplifier 110, but as shown in FIG. The output of the two-filter amplifier 120 is clearly shown by filtering and amplification. When washing water is flowed after the user leaves, a Doppler signal having a high frequency component is also generated.

In this way, by appropriately switching the directivity direction of the Doppler sensor 10C and appropriately monitoring the outputs of the first filter / amplifier 110 and the second filter / amplifier 120, the approach of the user, the speed and duration of the urine flow, and the usage Each person can be detected with high sensitivity. The detection of the movement of the user and the detection of the urine flow occur, for example, at the timing shown in FIGS. 14 (d) and 14 (e). In contrast, for example, the wash water can be flowed by opening the valve 550 of the water supply channel at the timing shown in FIG.
And the detection direction by the shaking of the sealing water 650 etc. can be prevented by setting the directivity direction of a sensor to the front.

The first and second embodiments of the present invention have been described above.
Hereinafter, these embodiments will be described in more detail with reference to examples.
(First embodiment)
First, as a first embodiment of the present invention, a specific example of the operation of the toilet cleaning device of the present invention mounted on the toilet bowl 600 as shown in FIG. 1 or FIG. 6 will be described.

15 to 17 and 19 are flowcharts illustrating the operation of the toilet bowl cleaning apparatus according to the embodiment of the invention.
That is, FIG. 15 represents the main flow of the operation of the toilet bowl cleaning apparatus of this embodiment.
First, in step S100, the directivity direction of the Doppler sensor is set to the front. That is, in the case of the first embodiment, detection is started using the sensor 10A as described above with reference to FIG. On the other hand, in the case of the second embodiment, the detection is started by directing the beam in the direction of the arrow A by the phase shifter 15 as described above with reference to FIG. By doing so, it is possible to prevent erroneous detection of shaking of the toilet seal water 650 and the like, thereby preventing malfunction.

  Next, in step S200, a user detection process is started.

FIG. 16 is a flowchart showing the contents of the user detection process.
First, in step S202, it is determined whether or not the output of the first filter / amplifier 110 is between predetermined voltages V1 and V2. Since the DC (direct current) component is cut in the first filter / amplifier, its output fluctuates up and down around the reference potential. As described above with reference to FIG. 14, when the user is detected, this shake increases.
For example, using a 5 volt power source, the reference potential is 2.5 volts, and V1 = 1.5 volts and V2 = 3.5 volts. Then, when the user is detected, this range is sufficiently exceeded, but when the user leaves the toilet 600 by 50 centimeters, the amplitude range of the signal is at most within the range of 2.2 to 2.8 volts. Fits in.
Therefore, hereinafter, when a signal exceeding the predetermined range is detected using the off-delay timer and the on-delay timer, the user does not continuously fall within the predetermined range for 0.3 seconds, and when the user has passed one second, A routine for detecting the above will be described.

First, when the output V does not exceed the range defined by V1 and V2 in step S202 (step S202: yes), the off-delay timer is started or measurement is continued in step S204.
Next, in step S206, it is determined whether or not the off-delay timer has passed 0.3 seconds. If it has not elapsed (step S206: no), the process returns to step S202 to determine the output of the first filter / amplifier 110. If it has elapsed (step S206: yes), the process proceeds to step S208, and the on-delay timer is reset.

On the other hand, when the output V exceeds the range between V1 and V2 in step S202 (step S202: no), the off-delay timer is reset in step S210.
In step S212, the on-delay timer is started or the measurement is continued.

Next, in step S214, it is determined whether or not the on-delay timer has elapsed for 1 second.
If one second has not elapsed (step S214: no), the process returns to step S202 to determine the output.
If 1 second has elapsed (step S214: yes), it is determined that a user has been detected in step S216, and the user detection processing routine is terminated.

Returning to the main routine shown in FIG. 15 again, the description is continued. In step S300, it is determined whether or not a user has been detected. When the user is not detected (step S300: no), the process returns to step S200, and the user detection routine is executed again.
On the other hand, when the user is detected (step S300: yes), the process proceeds to step S400, and the pointing direction of the sensor is changed downward. That is, in the case of the first embodiment, detection is started using the sensor 10B as described above with reference to FIG. On the other hand, in the case of the second embodiment, the detection is started by directing the beam in the direction of arrow B by the phase shifter 15 as described above with reference to FIG. By doing so, it is possible to detect with high sensitivity a urine flow whose scattering cross section is not so large.

After changing the directivity direction of the sensor, urine flow detection processing is executed in step S500.
FIG. 17 is a flowchart showing a urine flow detection routine. That is, this flowchart is a specific example in which, after detecting the urine flow once, if the state in which the urine flow is not detected continues for 3 seconds, it is determined that the urine flow is finished and the washing water is supplied.
First, in step S502, it is determined whether or not the output V of the second filter / amplifier 120 is between predetermined voltages V3 and V4. As illustrated in FIG. 14B, the output of the second filter / amplifier 120 shows a clear Doppler signal depending on the urine flow. Therefore, if the reference voltages V3 and V4 are appropriately set, the urine flow signal is clearly distinguished. it can.
In step S502, when the output V is between V3 and V4 (step S502: yes), step S502 is repeated again.
On the other hand, if the output V exceeds the range between V3 and V4 in step S502 (step S502: yes), the process proceeds to step S504 and the timer is started.
Then, the process proceeds to step S506, and it is determined whether or not 3 seconds have passed while the output V of the second filter / amplifier 120 is within a predetermined range. That is, it is determined whether or not the state where no urine flow is detected continues for 3 seconds.
If it does not continue for 3 seconds (step S506: no), it is determined that the urine flow has not yet ended, and the process returns to step S506 again to start the determination.

On the other hand, if it continues for 3 seconds (step S506: yes), it is determined that the urine flow has ended, the process proceeds to step S508, and the timer is stopped.
In step S510, the valve 550 of the water supply channel is opened for a time corresponding to the measurement time of the timer, and the cleaning water is flowed, and the detection processing routine is ended.

  According to the routine described above, it is determined that the urine flow is finished when the state in which the urine flow is not detected continues for 3 seconds after the urine flow is detected. This is because the urine flow by the user often occurs intermittently.

  Further, by measuring the duration of the urine flow with a timer and opening the valve 550 for a time corresponding to the measurement time, an appropriate amount of washing water according to the urine load can be flowed.

FIG. 18 is a graph illustrating the relationship between the timer measurement time and the valve 550 opening time.
That is, when the measurement time of the timer is very short (less than T1), there is a high possibility of erroneous detection and the valve 550 cannot be opened. And in the measurement range of the timer within a predetermined range (T1 to T2), the time for opening the valve 550 is constant. In addition, when the measurement time of the timer is long (T2 or more), the opening time of the valve 550 is lengthened according to the measurement time. In this way, it is possible to flow an amount of washing water corresponding to the urine load while maintaining a water-saving effect against malfunctions and the like.

Returning to the main flow of FIG. 15 again, the description will be continued. When the urine flow detection process (step S500) is completed in this way, it is determined in step S600 whether or not the urine flow is completed. This can be determined, for example, by performing step S506 illustrated in FIG.
If the urine flow has not ended (step S600: no), the process proceeds to step S500, and the urine flow detection processing routine is executed again.
On the other hand, if the urine flow has ended (step S600: yes), the process proceeds to step S700, and the pointing direction of the sensor is changed to the front. That is, in the case of the first embodiment, detection is started using the sensor 10A as described above with reference to FIG. On the other hand, in the case of the second embodiment, the detection is started by directing the beam in the direction of the arrow A by the phase shifter 15 as described above with reference to FIG. By doing so, it is possible to prevent erroneous detection of shaking of the toilet seal water 650 and the like, thereby preventing malfunction.

Thereafter, in step S800, processing for detecting the user's withdrawal is executed. FIG. 19 is a flowchart illustrating a processing routine for detecting a user exit.
That is, this flowchart is a specific example in which it is determined that the user has exited when the output of the first filter / amplifier 110 is within the predetermined range for 2 seconds continuously.
First, in step S802, it is determined whether or not the output of the first filter / amplifier 110 is between predetermined voltages V1 and V2. This step is as described above with respect to step S202 and the like. For example, the predetermined voltage V1 is set to 1.5 volts, and the voltage V2 is set to 3.5 volts.

If the output V is not within the predetermined range (step S802: no), the off-delay timer is reset in step S804.
On the other hand, if the output V is within the predetermined range (step S802: yes), the process proceeds to step S806, where the off-delay timer is started or measurement is continued.

In step S808, it is determined whether or not the off-delay timer has elapsed for 2 seconds.
If 2 seconds have not elapsed (step S808: no), the process returns to step S802 to determine the output V.
On the other hand, if 2 seconds have elapsed (step S808: yes), the process proceeds to step S810, and it is determined that the user has left.

  As described above, in this specific example, it is determined that the user has left when a predetermined output is not obtained continuously for 2 seconds. Also in this processing routine, since the Doppler sensor is directed to the front of the toilet, it is possible to solve the problem of erroneously detecting that the user has not left by erroneously detecting the shaking of the sealing water 650 or the like.

  Returning to the main routine of FIG. 15 again, after the process of detecting the user exit, it is determined whether or not the user exit is detected in step S900. If the user's exit is not detected (step S900: no), the process returns to step S800 again to detect the user's exit.

  On the other hand, when the exit of the user is detected (step S900: yes), the process returns to step S200, and a process for detecting a new user is started.

  As described above, according to the present embodiment, the direction of the sensor is changed as appropriate so that the detection of the user and the detection of the urine flow are surely performed, and the optimum washing water is optimized according to the urine volume. It can be flown at the right timing.

(Second embodiment)
Next, as a second embodiment of the present invention, an operation in which “pre-cleaning” is further added to the first embodiment will be described.

FIG. 20 is a flowchart showing the operation of the toilet bowl cleaning device of the present embodiment. That is, this flowchart corresponds to the main routine described above with reference to FIG.
In this embodiment, “pre-cleaning” is performed in step S350 after the user detection determination process in step S300. Pre-cleaning is a cleaning process in which a small amount of cleaning water is allowed to flow through the toilet before use to make the toilet surface wet and make it difficult to attach dirt.

  The pre-cleaning can be performed, for example, by opening the valve 550 for 1 second. When washing water is flowed, a sensor directed downward detects a Doppler signal due to the washing water flow. According to the inventor's experiment, the Doppler signal due to the washing water flow is often detected larger than the urine flow. Even in the pre-cleaning, after the valve 550 is closed, it may be difficult to detect the urine flow for about 4 seconds due to “dripping” of the cleaning water. After providing such a standby time as appropriate, it is desirable to start detection of urine flow by changing the direction of the sensor downward in step S400.

(Third embodiment)
Next, as a third embodiment of the present invention, a specific example in which the toilet cleaning device of the present invention is mounted on a large and small toilet will be described.
FIG. 21 is a schematic view illustrating the directivity direction of the Doppler sensor of the toilet bowl cleaning device of the present embodiment.
That is, the large and small toilet 620 is provided with a low tank 622, a toilet seat lid 626, a toilet seat cleaning device 628, and the like. The toilet seat cleaning device 628 may jet warm water to clean the user's buttocks and the like, and may control the opening and closing of the toilet seat lid 626.
In this embodiment, the toilet seat cleaning device 628 includes Doppler sensors 10A and 10B or 10C. As described above with reference to the first embodiment or the second embodiment, the Doppler sensor can switch the directivity direction in the directions of arrows A and B, respectively.

  22 to 24 are schematic diagrams for explaining the operation of the toilet bowl cleaning apparatus of this embodiment. First, in the standby state, as shown in FIG. 22A, the approach of the user 900 is detected by emitting radio waves in the direction of arrow A. At this time, the shaking of the sealed water 650 stretched on the toilet 620 is not detected. Therefore, the approach of the user 900 can be detected with high accuracy.

  When the user 900 is detected, for example, as shown in FIG. 22B, it is more convenient if the toilet seat cleaning device 628 automatically opens the toilet seat lid 626.

After detecting the user 900, as shown in FIG. 23, the directivity direction of the sensor is changed to the direction of the arrow B or the arrow A. For example, when a seating sensor is provided in the toilet seat cleaning apparatus 628, the direction of the sensor can be maintained at the arrow A until the seating sensor detects the seating of the user 900. In this way, in the usage mode for boys, the urine flow can be detected with high sensitivity because the beam emission direction and the urine flow scattering direction approach a parallel relationship.
On the other hand, when a seating sensor is not provided, the direction of the sensor may be switched to the direction of arrow B to detect urine flow. If a seating sensor is provided, the direction of the sensor is switched to the direction of arrow B when seating is detected.

FIG. 24 is a schematic diagram showing a state in which the user 900 is seated.
In a state where the user 900 is seated, the urine flow can be detected by switching the direction of the sensor in the direction of the arrow B. Further, by detecting the shaking of the sealed water 650, it is possible to estimate the usage state by the user 900.

FIG. 25 is a schematic diagram showing how the user 900 rises and leaves.
In the case where a seating sensor is provided, the pointing direction of the sensor can be switched to the direction of arrow A when the seating sensor detects an operation in which the user 900 stands up from the toilet seat. If no seating sensor is provided, the direction of the sensor can be switched to the direction of arrow A when the urine flow or the shaking of the sealing water 650 is not detected in the state shown in FIG.

  And washing water can be poured automatically. That is, in the case where an automatic washing unit that can operate the drain valve separately from the manual operation by the manual operation handle 624 of the low tank 622 is provided, the washing water is automatically flowed when the user 900 stands up from the toilet seat. It is possible.

  Then, as shown in FIG. 25A, when the user 900's exit operation is detected and the movement signal of the user 900 is no longer detected, it can be determined that the user 900 has exited. At this time, washing water may be allowed to flow.

  Thereafter, as shown in FIG. 25 (b), it is more convenient to automatically close the toilet seat lid 626.

  As described above, also in the present embodiment, by providing the two Doppler sensors 10A and 10B, or by providing the Doppler sensor 10C capable of switching the directing direction, erroneous detection due to the shaking of the sealed water 650 or the like in the standby state. A toilet cleaning device that has been eliminated can be provided.

(Fourth embodiment)
Next, as a fourth embodiment of the present invention, a second specific example in which the toilet cleaning device of the present invention is mounted on a large and small toilet will be described.
FIG. 26 is a schematic view illustrating the orientation direction of the Doppler sensor of the toilet bowl cleaning device of the present embodiment.
That is, in the present embodiment, the Doppler sensors 10A and 10B, or 10C are arranged near the lower end of the front surface of the toilet 620. The directing direction can be switched between the front of the toilet 620 as indicated by the arrow A and the substantially vertical upward direction as indicated by the arrow B.

Even if the sensor is arranged in this manner, the approach of the user and the use state of the toilet bowl can be detected with high sensitivity in the same manner as described above with respect to the third embodiment.
That is, in the standby state, as shown in FIG. 27, the approach of the user 900 can be detected without erroneously detecting the shaking of the sealed water 650 by switching the direction of the sensor to the direction of the arrow A.
When the user 900 is detected, the direction of the sensor can be switched to the direction of arrow B as shown in FIG. In this way, in the usage mode for boys' small, the direction of the beam and the scattering direction of the urine flow are substantially opposed to each other, so that the urine flow can be detected with high sensitivity.

  As shown in FIG. 29, in the state where the user 900 is seated, the directivity direction of the sensor is also switched to the direction of the arrow B. In this way, the urine flow in the seated state can be detected, and the use state of the user can be estimated by detecting the shaking of the sealed water 650.

(Fifth embodiment)
Next, as a fifth embodiment of the present invention, a toilet cleaning device of the present invention in a public toilet in which a plurality of toilet bowls are arranged will be described.
FIG. 30 is a schematic view illustrating such a public toilet.

  Each of the toilet bowls 600A, 600B, and 600C incorporates the sensors 10A and 10B or 10C as described above with respect to the first embodiment or the second embodiment. In the standby state, these sensors direct beams toward the front of the toilet as shown in FIG. 2 or FIG.

  However, in the case of a public toilet in which a plurality of toilets are arranged in this manner, the user 900 arrives at a target toilet through the front of an adjacent toilet. For example, the user 900 may pass in front of the toilet 600C as shown in FIG. 30A and select the toilet 600B as shown in FIG. 30B.

In such a case, if the sensor of the toilet 600C detects the user sensitively, it may cause a malfunction. Therefore, in such a case, measures such as reducing the detection sensitivity for the user 900 are effective. For this purpose, for example, the range of the reference voltages V1 and V2 can be widened in step S202 of the user detection processing routine described above with reference to FIG. That is, detection is performed only when the amplitude of the Doppler signal is large. Alternatively, the reference value (0.3 seconds) of the elapsed time of the off-delay timer in step S206 may be lengthened.
By these measures, erroneous detection can be prevented by appropriately adjusting the detection sensitivity for the user 900.

The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples.
For example, as for the shape and structure of the sensor, the specific configuration of the control unit, the shape of the toilet bowl and the arrangement position of the sensor, those that have been appropriately modified and adopted by those skilled in the art are within the scope of the present invention. It is included in the scope of the invention.

It is a schematic diagram showing the principal part structure of the toilet bowl washing | cleaning apparatus concerning the 1st Embodiment of this invention. It is a schematic diagram which illustrates operation | movement of the toilet bowl washing | cleaning apparatus of 1st Embodiment. It is a schematic diagram which illustrates operation | movement of the toilet bowl washing | cleaning apparatus of 1st Embodiment. It is a schematic diagram which illustrates the structure of Doppler sensor 10A, 10B which can be used in 1st Embodiment. 3 is a schematic view illustrating the configuration of a control unit 100. FIG. It is a schematic diagram showing the principal part of the toilet bowl washing | cleaning apparatus concerning 2nd Embodiment of this invention. It is a schematic diagram showing the principal part structure of 10D of Doppler sensors used in 2nd Embodiment. It is a schematic diagram showing the cross-sectional structure of 10C of Doppler sensors. (A) is the top view seen from the antenna surface, (b) is the front view. It is a schematic diagram for demonstrating the radiation | emission direction of the electromagnetic wave by the phase shifter. It is a schematic diagram which illustrates operation | movement of the toilet bowl washing | cleaning apparatus of 2nd Embodiment. It is a schematic diagram which illustrates operation | movement of the toilet bowl washing | cleaning apparatus of 2nd Embodiment. It is a schematic diagram which illustrates the structure of the control part 100 of the toilet bowl washing | cleaning apparatus of 2nd Embodiment. It is the graph and timing chart which illustrate the result of the experiment which this inventor implemented. It is a flowchart which illustrates operation | movement of the toilet bowl washing | cleaning apparatus of the Example of this invention. It is a flowchart which illustrates operation | movement of the toilet bowl washing | cleaning apparatus of the Example of this invention. It is a flowchart which illustrates operation | movement of the toilet bowl washing | cleaning apparatus of the Example of this invention. It is a graph which illustrates the relationship between the measurement time of a timer, and the time which opens the valve | bulb 550. FIG. It is a flowchart which illustrates operation | movement of the toilet bowl washing | cleaning apparatus of the Example of this invention. It is a flowchart showing operation | movement of the toilet bowl washing | cleaning apparatus of 2nd Example of this invention. It is a schematic diagram which illustrates the directivity direction of the Doppler sensor of the toilet bowl washing | cleaning apparatus of 3rd Example of this invention. It is a schematic diagram for demonstrating operation | movement of the toilet bowl washing | cleaning apparatus of 3rd Example. It is a schematic diagram for demonstrating operation | movement of the toilet bowl washing | cleaning apparatus of 3rd Example. It is a schematic diagram for demonstrating operation | movement of the toilet bowl washing | cleaning apparatus of 3rd Example. It is a schematic diagram showing a user 900 rising and leaving. It is a schematic diagram which illustrates the directivity direction of the Doppler sensor of the toilet bowl washing | cleaning apparatus of 3rd Example of this invention. It is a schematic diagram showing that the approach of the user 900 can be detected without erroneously detecting the shaking of the sealed water 650 by switching the direction of the sensor in the direction of arrow A. It is a schematic diagram showing a mode that the directivity direction of a sensor is switched to the direction of arrow B. It is a schematic diagram showing the state in which the user 900 was seated. It is a schematic diagram which illustrates a public toilet.

Explanation of symbols

10A, 10B, 10C Doppler sensor 12 Oscillator 15 Phase shifter 15A, 15B Switching means 16, 16A, 16B Antenna 18 Mixer 20 Shield case 22 Substrate 24 Ground layer 26 Antenna substrate 28A, 28B Through hole 30 Signal line 100 Controller 110 First filter / amplifier 120 Second filter / amplifier 140 Valve drive circuit 500 Water supply channel 550 Valve 600, 600A to 600C Small toilet 620 Large / small toilet 621 Toilet seat 622 Low tank 624 Manual operation handle 626 Toilet seat lid 628 Toilet seat cleaning device 650 Sealing Water 700 Drainage channel 900 User S Object to be detected

Claims (9)

A toilet cleaning device that supplies cleaning water to a toilet in which sealed water is formed in the drainage section,
A first detection operation for detecting a Doppler effect by emitting a radio wave directed in a first direction that does not substantially detect the shaking of the sealed water; and a second detection capable of substantially detecting the shaking of the sealed water A second detecting operation for detecting a Doppler effect by emitting a radio wave directed in a direction;
Control means for controlling the supply of the cleaning water based on the detection result of at least one of the first and second detection operations;
A toilet cleaning device comprising:   The toilet according to claim 1, wherein the detection means includes a first Doppler sensor that performs the first detection operation and a second Doppler sensor that performs the second detection operation. Cleaning device. The detection means includes a first antenna, a second antenna, and a phase shifter that varies a phase difference between radio waves emitted from the first and second antennas.
The toilet cleaning device according to claim 1, wherein the first detection operation and the second detection operation can be selectively executed by switching the phase difference of the radio wave by the phase shifter. A toilet cleaning device for supplying cleaning water to a toilet,
A first antenna, a second antenna, and a phase shifter that makes the phase difference between the radio waves emitted from the first and second antennas variable. By switching the phase difference, the first detection operation for emitting the radio wave directed in the first direction to detect the Doppler effect and the radio wave directed in the second direction different from the first direction are emitted. Detecting means capable of selectively executing a second detection operation for detecting the Doppler effect;
Control means for controlling the supply of the washing water based on the detection result of the detection means;
A toilet cleaning device comprising:   5. The phase shifter according to claim 3, wherein at least one of a line length connected to the first antenna and a line length connected to the second antenna is variable. A toilet cleaning device according to claim 1. In the first detection operation, a human body is detected,
The toilet cleaning device according to any one of claims 1 to 5, wherein a urine flow is detected in the second detection operation. A first filter / amplifying means for passing a signal in a first frequency band and amplifying the signal with a first amplification factor;
A second filter / amplifying means for passing a signal in a second frequency band whose lower limit is higher than that of the first frequency band and amplifying the signal by a second amplification factor;
Further comprising
The detection result obtained by the first detection operation is determined via the first filter / amplifying unit,
7. The detection result obtained by the second detection operation is determined via the first filter / amplification unit and the second filter / amplification unit. Toilet bowl cleaning device described in 1. The toilet is a small toilet
The detection means is provided on the upper part of the toilet toilet body,
The first direction is a direction toward the front of the toilet bowl,
The toilet cleaning device according to any one of claims 1 to 6, wherein the second direction is substantially vertically downward. The toilet bowl cleaning according to any one of claims 1 to 8, wherein the control means changes a total flow rate of the washing water based on a detection result obtained by the second detection operation. apparatus.

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