JP2006299726A - Toilet bowl flushing device and method for detecting clogging of drainage pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet bowl flushing device for detecting clogging of a drainage pipe, and a method for detecting the clogging of the drainage pipe using the device. <P>SOLUTION: The toilet bowl flushing device includes a valve which enables supply of flushing water to the toilet bowl, a control means for opening and closing the valve, and a Doppler sensor generating a differential signal based on the difference between a frequency of a transmitted electric wave and that of the reflected wave. The flushing device is provided with a reserved water detecting means for detecting a shake of a surface of the reserved water in a trap or a bowl of the toilet based on the frequency and amplitude of the differential signal generated by the Doppler sensor. The control means controls the valve to open and then controls detection of the clogging of the drainage pipe based on a state of detection of the reserved water detecting means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a toilet cleaning device that supplies cleaning water to a toilet by opening and closing a valve and cleaning the inside of the toilet, and a drain pipe clogging detection method in the toilet cleaning device.

  Conventionally, some urinals automatically clean the urinal by supplying wash water into the urinal, and supply of the wash water every predetermined time or urinal There are things to be done after the user has used it.

  Particularly in recent years, toilet cleaning devices that detect a toilet user using human body detection means and supply cleaning water to the toilet every time the toilet user is detected have become mainstream. For example, as such a toilet cleaning device, there is one that supplies cleaning water into a toilet when it is detected that there is no person after detecting that there is a certain period of time by a reflective inactive sensor.

  Recently, a toilet cleaning device has been proposed that detects a user's use using a microwave sensor or a water level sensor and supplies cleaning water into the toilet.

  For example, in a toilet cleaning device using a microwave sensor, a power spectrum is obtained from the difference frequency between the frequency of the transmitted microwave and the frequency of the reflected wave, and the peak value of the power spectrum rises above a predetermined threshold, When the state continues for a certain period of time, it is determined that it has been used, and washing water is supplied into the toilet.

  Moreover, in a toilet flushing device using a water level sensor, a change in the water level in the trap of the toilet bowl is detected, a user's use is detected according to the amount of change in the water level, and wash water is supplied into the toilet bowl. (For example, refer to Patent Document 1).

When the inside of the urinal is automatically cleaned using the human body detection means as described above, the user of the toilet bowl is hygienic because there is no need to operate the operation buttons and the like for discharging the washing water, and the operation by the user. Since it is possible to prevent that the urinal is not washed by not being performed, there is an advantage that the urinal can always be kept clean.
Japanese Patent Laid-Open No. 7-189315

  However, in a toilet bowl cleaning device using a reflective inactive sensor or microwave sensor, even if the pipe connected to the toilet bowl is clogged, cleaning water is poured into the toilet bowl every time a user uses the toilet bowl. Since it supplies, when wash water is supplied in a toilet bowl, the problem that flush water overflows from a toilet bowl will arise.

  As a cause of this pipe clogging, it is considered that calcium contained in the user's urine gradually precipitates in the pipe to form urine stone, and this urine stone blocks the pipe.

  It is generally known that this urine stone is dissolved by silver ions.

  Therefore, in the toilet cleaning device using a microwave sensor, in addition to detecting the human body by the microwave sensor, the urine flow rate is detected by the microwave sensor, and the washing water containing silver ions in an amount corresponding to the urine flow rate is used. Although it may be possible to prevent clogging of the pipe by supplying it, the amount of calcium in the urine varies from person to person, so it is not possible to completely prevent clogging of the pipe, resulting in overflow of flush water from the toilet. It will be.

  On the other hand, in a toilet cleaning device that uses a water level sensor, when other toilets that share a drain pipe are used and sewage is discharged into the drain pipe, wind pressure is generated in the drain pipe. There is no water level change in the toilet trap.

  The water level sensor of the toilet bowl cleaning device that does not use this change in the water level detects and malfunctions, causing a problem that the cleaning water is unnecessarily supplied.

  Therefore, in the present invention according to claim 1, there are provided a valve capable of supplying wash water to the toilet, a control means for opening or closing the valve, the frequency of the transmitted radio wave and the frequency of the reflected wave. In a toilet bowl cleaning device including a Doppler sensor that generates a difference signal from a difference, a reservoir that detects shaking of a pool surface in a toilet trap or a ball based on the frequency and amplitude of the difference signal generated by the Doppler sensor. A water detection means is provided, and the control means performs control according to the detection state of the accumulated water detection means after performing valve opening control.

  Moreover, in this invention based on Claim 2, in the toilet bowl washing | cleaning apparatus of Claim 1, a silver electrode is provided in the supply flow path of the wash water, and the control means performs control according to the detection state of the accumulated water detection means. The present invention is characterized in that energization control of the silver electrode is performed and cleaning water containing silver ions is supplied to the toilet.

  Moreover, in this invention which concerns on Claim 3, in the toilet bowl washing | cleaning apparatus of Claim 2, a control means energizes a silver electrode by the energization time according to the detection state of the accumulated water detection means, It is characterized by the above-mentioned. And

  Moreover, in this invention which concerns on Claim 4, in the toilet bowl washing | cleaning apparatus of any one of Claims 1-3, whenever it controls a valve | bulb and supplies wash water, the detection state of a stored water detection means is changed. Each of the storage units includes a storage unit, and the control unit controls the valve to increase the supply amount of the next cleaning water when it is determined that there is no change in the plurality of detection states stored in the storage unit. .

  Moreover, in this invention which concerns on Claim 5, in the toilet bowl washing | cleaning apparatus of any one of Claims 1-4, after a valve opens the control means, the detection state of the accumulated water detection means is a predetermined amount. When it is determined that the above-mentioned swaying of the water storage surface is performed, the valve closing control is performed as the control according to the detection state of the water storage detecting means, and the supply of the cleaning water is stopped.

  Moreover, in this invention which concerns on Claim 6, in the toilet bowl washing | cleaning apparatus of any one of Claims 1-5, based on the frequency of the difference signal produced | generated by the Doppler sensor, A human body detecting means for detecting separation, and a urine flow detecting means for detecting a urine flow based on the frequency of the difference signal generated by the Doppler sensor, and the control means includes a urine flow detecting means or a human body detecting means. The valve is controlled to open according to the detection result, and cleaning water is supplied to the toilet.

  Moreover, in this invention which concerns on Claim 7, in the toilet bowl washing | cleaning apparatus of any one of Claims 1-6, when a toilet bowl washing | cleaning apparatus is not used for a fixed period, a control means controls valve opening, The cleaning water is supplied to the toilet.

  Further, in the present invention according to claim 8, in the toilet bowl cleaning device according to any one of claims 1 to 7, the toilet bowl cleaning device comprises a notification means for notifying the clogging of the drain pipe connected to the toilet bowl, When the clogging of the drain pipe is detected based on the detection state of the accumulated water detection means, control is performed to notify the notification means.

  Further, in the present invention according to claim 9, there is provided a drainage pipe clogging detection method in a toilet flushing apparatus for supplying flush water to a toilet bowl by opening and closing the valve and washing the inside of the toilet bowl, wherein the valve is opened. Supplying the flush water to the toilet, generating a differential signal from the difference between the frequency of the radio wave transmitted to the trap or ball of the toilet and the frequency of the reflected wave, and the frequency and amplitude of the differential signal Based on the above, it was decided to detect clogging of the drain pipe by the step of detecting the fluctuation of the accumulated water surface in the trap or the ball and the step of detecting clogging of the drain pipe based on the detection result of the accumulated water surface fluctuation. .

  In this invention, there exists an effect as described below.

  Therefore, in the present invention according to claim 1, there are provided a valve capable of supplying wash water to the toilet, a control means for opening or closing the valve, the frequency of the transmitted radio wave and the frequency of the reflected wave. In a toilet bowl cleaning device including a Doppler sensor that generates a difference signal from a difference, a reservoir that detects shaking of a pool surface in a toilet trap or a ball based on the frequency and amplitude of the difference signal generated by the Doppler sensor. Since water control means is provided and the control means performs control according to the detection state of the accumulated water detection means after opening the valve, the cleaning water is supplied into the toilet with the pipe clogged. Therefore, there is no problem that the flushing water overflows from the toilet, and even if another toilet that shares the drainpipe is used and sewage is discharged to the drainpipe, the toilet bowl is wasted. There is no possibility that the water problem that supply occurs.

  Moreover, in this invention based on Claim 2, in the toilet bowl washing | cleaning apparatus of Claim 1, a silver electrode is provided in the supply flow path of the wash water, and the control means performs control according to the detection state of the accumulated water detection means. In order to control the energization of the silver electrode and supply wash water containing silver ions to the toilet bowl, if the drain pipe is clogged, urine stones that may cause the drain pipe are clogged with silver ions. It can be dissolved by the contained cleaning water to eliminate clogging of the drain pipe.

  Moreover, in this invention which concerns on Claim 3, in the toilet bowl washing | cleaning apparatus of Claim 2, a control means energizes a silver electrode by the energization time according to the detection state of the accumulated water detection means, It is characterized by the above-mentioned. Therefore, it is possible to accurately eliminate the clogging of the drain pipe without consuming unnecessary power.

  Moreover, in this invention which concerns on Claim 4, in the toilet bowl washing | cleaning apparatus of any one of Claims 1-3, whenever it controls a valve | bulb and supplies wash water, the detection state of a stored water detection means is changed. Each of the storage units includes a storage unit, and the control unit controls the valve to increase the supply amount of the next cleaning water when it is determined that there is no change in the plurality of detection states stored in the storage unit. Therefore, it is possible to promote elimination of clogging of the drain pipe.

  Moreover, in this invention which concerns on Claim 5, in the toilet bowl washing | cleaning apparatus of any one of Claims 1-4, after a valve opens the control means, the detection state of the accumulated water detection means is a predetermined amount. If it is determined that the water surface is shaking as described above, the valve closing control is performed as the control according to the detection state of the water storage detection means, and the supply of cleaning water is stopped. If there is a clogged drainage pipe that cannot be resolved simply by supplying cleaning water containing silver ions, such as when clogged with foreign matter such as dust, stop the supply of cleaning water and remove the cleaning water from the toilet. It is possible to prevent overflow.

  Moreover, in this invention which concerns on Claim 6, in the toilet bowl washing | cleaning apparatus of any one of Claims 1-5, based on the frequency of the difference signal produced | generated by the Doppler sensor, A human body detecting means for detecting separation, and a urine flow detecting means for detecting a urine flow based on the frequency of the difference signal generated by the Doppler sensor, and the control means includes a urine flow detecting means or a human body detecting means. Since the valve is controlled to open according to the detection result and the wash water is supplied to the toilet, multiple types of information can be detected by one Doppler sensor. The number can be reduced, and the manufacturing cost of the cleaning toilet seat device can be reduced.

  Moreover, in this invention which concerns on Claim 7, in the toilet bowl washing | cleaning apparatus of any one of Claims 1-6, when a toilet bowl washing | cleaning apparatus is not used for a fixed period, a control means controls valve opening, Since the cleaning water is supplied to the toilet bowl, it is possible to reliably detect clogging of the drain pipe even in the toilet cleaning apparatus that is not used by the user for a long period of time.

  Further, in the present invention according to claim 8, in the toilet bowl cleaning device according to any one of claims 1 to 7, the toilet bowl cleaning device comprises a notification means for notifying the clogging of the drain pipe connected to the toilet bowl, When the clogging of the drainage pipe is detected based on the detection state of the accumulated water detection means, the control means for informing the notification means is performed. It is possible to reliably recognize the clogging.

  Further, in the present invention according to claim 9, there is provided a drainage pipe clogging detection method in a toilet flushing apparatus for supplying flush water to a toilet bowl by opening and closing the valve and washing the inside of the toilet bowl, wherein the valve is opened. Supplying the flush water to the toilet, generating a differential signal from the difference between the frequency of the radio wave transmitted to the trap or ball of the toilet and the frequency of the reflected wave, and the frequency and amplitude of the differential signal Therefore, it was decided to detect the clogging of the drain pipe by the step of detecting the shaking of the water surface in the trap or in the ball and the step of detecting the clogging of the drain pipe based on the detection result of the water surface fluctuation. , The clogging of the drain pipe can be reliably detected, and there is a problem that the cleaning water is supplied into the toilet bowl when the piping is clogged and the cleaning water overflows from the toilet bowl. Ku, even if the other toilet sharing the drain pipe sewage drainage pipe being used is discharged, never problem that supplies results in a waste wash water to the toilet bowl.

  A toilet cleaning device according to the present invention includes a valve that can supply cleaning water to a toilet, a control means that opens or closes the valve, a trap of a toilet or the frequency of a radio wave transmitted to the trap, and And a Doppler sensor that generates a difference signal from the difference from the frequency of the reflected wave.

  Furthermore, this toilet flushing device detects the shaking of the water surface in the toilet trap or the ball based on the signal level, frequency and amplitude of the differential signal generated by the Doppler sensor. It has a stored water detection means for detecting clogging of the connected drain pipe.

  Then, the control means performs control according to the detection state of the accumulated water detection means after performing valve opening control.

  In this way, the clogging of the drain pipe is detected by the stored water detection means, and the control means performs control according to the detection state, so that the wash water is supplied into the toilet bowl with the pipe clogged, The problem of overflow of washing water does not occur.

  In addition, even when another toilet that shares the drain pipe is used and sewage is discharged to the drain pipe, there is no problem that wasteful washing water is supplied to the toilet bowl.

  Further, this toilet cleaning device is provided with a silver electrode in the supply channel of the cleaning water, and the control means performs energization control to the silver electrode as control according to the detection state of the accumulated water detection means, The cleaning water containing is supplied.

  Thereby, when the drain pipe is clogged, the urine stone considered to be the cause of the drain pipe clogging can be dissolved by the washing water containing silver ions, and the clogging of the drain pipe can be eliminated.

  In addition, the control means energizes the silver electrode by the energization time corresponding to the detection state of the accumulated water detection means.

  In this way, the control means accurately adjusts the time for energizing the silver electrode according to the degree of clogging of the drain pipe indirectly detected by the stored water detection means based on the shaking of the stored water surface. Clogging can be eliminated.

  In addition, this toilet cleaning device includes storage means for storing the detection state of the accumulated water detection means each time the valve is controlled to supply cleaning water to the toilet.

  When the control means determines that there is no change in the plurality of detection states stored in the storage means and no improvement is found in the clogging of the drain pipe, the supply amount of the next washing water is increased, thereby increasing the silver ion The valve can be controlled so as to increase the supply amount of cleaning water containing water, and the elimination of drain pipe clogging can be promoted.

  Further, when the control means determines that the detection state of the accumulated water detection means is a fluctuation of the accumulated water surface of a predetermined amount or more after the valve is opened and the cause of the clogging of the drain pipe is other than urine stone, the accumulated water detection As control according to the detection state of the means, valve closing control is performed to stop the supply of cleaning water.

  As a result, if there is a clogged drainage that cannot be resolved simply by supplying cleaning water containing silver ions, such as when the drainage pipe is clogged with foreign matter such as dust, stop the supply of cleaning water. This prevents the flushing water from overflowing from the toilet.

  Further, the toilet cleaning device is based on the human body detecting means for detecting the approach or separation between the toilet and the human body based on the frequency of the differential signal generated by the Doppler sensor, and on the frequency of the differential signal generated by the Doppler sensor. And urine flow detecting means for detecting urine flow.

  This human body detecting means detects the proximity of the toilet and the human body depending on whether or not a specific frequency component is included in the differential signal output from the Doppler sensor for detecting the shaking of the water surface in the trap of the toilet bowl or in the ball. Alternatively, separation is detected.

  The urine flow detecting means detects the urine flow depending on whether or not the differential signal output from the Doppler sensor includes a specific frequency component different from that detected by the human body detecting means. ing.

  Then, the control means controls the opening of the valve according to the detection result of the urine flow detection means or the human body detection means, and supplies the wash water to the toilet.

  As described above, since one kind of Doppler sensor can detect a plurality of types of information such as the presence or absence of a human body, urine flow, and clogging of a drain pipe, the number of sensors provided in the toilet bowl cleaning device can be reduced, and the cleaning toilet seat The manufacturing cost of the apparatus can be reduced.

  In addition, when the toilet flushing device is not used for a certain period of time, the control means periodically controls the opening of the valve and supplies flush water to the toilet, thereby periodically monitoring the shaking of the trap surface of the toilet bowl or the water pool in the ball. Therefore, the clogging of the drain pipe is monitored.

  Thereby, even if it is a toilet bowl washing | cleaning apparatus which is not utilized by a user for a long period, clogging of a drain pipe can be detected reliably.

  In addition, the toilet cleaning device includes a notification unit that notifies the clogging of the drain pipe connected to the toilet bowl, and the control unit detects the clogging of the drain pipe based on the detection state of the accumulated water detection unit. Then, the control for notifying the notifying means is performed.

  Thereby, since the construction worker and manager of the toilet bowl cleaning apparatus can surely recognize that the drain pipe is clogged, it is possible to quickly start the work for eliminating the clogging of the drain pipe.

  Hereinafter, a toilet bowl cleaning apparatus according to the present invention will be specifically described with reference to the drawings.

  As shown in FIG. 1, a toilet bowl cleaning device 1 according to an embodiment of the present invention includes a toilet body 2 in which a Doppler sensor 5 is housed, a bowl 2 a and a trap of the toilet body 2 connected to the toilet body 2. 2b, a supply flow path (hereinafter referred to as "water supply pipe 3") for supplying water for cleaning the space in the space 2b (hereinafter referred to as "water supply pipe 3"), and a midway portion of the water supply pipe 3 A valve 4 for supplying and stopping washing water to the toilet body 2, a silver electrode 6 that is disposed in the middle of the water supply pipe 3 and contains silver ions in the washing water when energized, and a valve A cleaning control unit 7 that functions as a control unit that controls the entire toilet cleaning device 1 such as energization control to the silver electrode 6 and control of the Doppler sensor 5. It has.

  The washing water supplied from the water supply pipe 3 to the toilet body 2 is drained from a drain pipe 8 connected to the trap 2b of the toilet body 2.

  Further, an LED (light emitting diode) 9 is provided in the vicinity of the washing water outlet (hereinafter referred to as “spreader 2 c”) at the connecting portion between the toilet body 2 and the water supply pipe 3.

  And when this drain 9 is clogged, this LED 9 blinks at a constant period under the control of the washing control unit 7 or is continuously lit to notify the clogging of the drain 8. It functions as.

  In the toilet cleaning device 1 configured as described above, the cleaning control unit 7 detects the shaking of the water surface in the ball 2a of the toilet body 2 or the trap 2b based on the signal input from the Doppler sensor 5, and the toilet body 2 In addition to detecting the proximity or separation between the body and the human body, detecting the urine flow during small use, etc., and controlling the opening and closing of the valve 4 and the energization control to the silver electrode 6 according to these detection states, I try to wash it.

  Here, the configuration of the Doppler sensor 5 will be described with reference to FIG.

  The Doppler sensor 5 generates a radio signal with a frequency of, for example, 10.525 GHz (FS), and transmits the signal as a microwave that is a radio wave, and receives a reflected wave of the microwave transmitted by the transmission circuit 10. The difference detection which outputs the signal (henceforth a "difference signal") of the frequency difference (DELTA) F of the frequency FS of the microwave which the receiving circuit 11 and the transmission circuit 10 transmit, and the microwave frequency Fb which the receiving circuit 11 receives. Circuit 12.

  Therefore, when the Doppler sensor 5 is operating, a microwave is transmitted from the transmission circuit 10, the reflected wave is received by the reception circuit 11, and a difference signal is output from the difference detection circuit 12.

  Moreover, in the toilet bowl washing | cleaning apparatus 1 of this embodiment, although it was set as the structure which utilizes the Doppler effect at the time of using an electromagnetic wave, you may use the Doppler sensor which utilizes sound waves, such as an ultrasonic wave, for example, without limiting to this. .

  Next, the configuration of the cleaning control unit 7 of the toilet bowl cleaning device 1 will be described with reference to FIG.

  As shown in FIG. 3, the washing control unit 7 switches between a CPU (central processing unit) 13, an amplifier circuit 14, a low frequency detection filter 15, a urine flow band detection filter 16, and a urine flow detection means 16 a. Means 19, ball section water detection filter 17, accumulated water detection means 17 a, human band detection filter 18, human body detection means 18 a, LED drive circuit 20, valve drive circuit 21, and storage means 23. ing.

  The amplifier circuit 14 is a circuit that amplifies the differential signal output from the differential detection circuit 12 of the Doppler sensor 5 and inputs the amplified differential signal to the low-frequency detection filter 15.

  The low-frequency detection filter 15 is a filter circuit that generates a differential signal in which a high-frequency component of the differential signal amplified by the amplifier circuit 14 is reduced and inputs the differential signal to the urinary flow band detection filter 16 and the switching unit 19. The low-pass filter circuit has a characteristic with a cutoff frequency of 330 Hz.

  The switching means 19 is a switch circuit that performs switching for inputting the difference signal from which the high-frequency component input from the low-frequency detection filter 15 is removed to either the ball portion water detection filter 17 or the human band detection filter 18. is there. The switching means 19 performs a switching operation based on a signal input from the CPU 13.

  The urine flow band detection filter 16 is a band-pass filter circuit that passes only the difference signal in the vicinity of the frequency band of 80 to 180 Hz indicating the urine flow among the difference signals input from the low band detection filter 15.

  The urine flow detection means 16a is a circuit that detects the presence or absence of urine flow based on the difference signal input from the urine flow band detection filter 16, and inputs a signal indicating the detection state to the CPU 13.

  The ball-in-water detection filter 17 is based on the difference signal input from the low-frequency detection filter 15 and indicates 0 of the water level of the water accumulated in the toilet bowl 2a or the trap 2b (hereinafter referred to as “reserved water surface”). This is a bandpass filter circuit that allows only a difference signal in the vicinity of a frequency band of ˜15 Hz to pass.

  Based on the frequency and amplitude of the differential signal input from the ball-portion water detection filter 17, the stored water detection means 17 a detects the degree to which the stored water surface is shaking, and inputs a signal indicating the detected state to the CPU 13. Circuit.

  The human band detection filter 18 is a band-pass filter circuit that passes only the differential signal in the vicinity of the 0 to 40 Hz frequency band indicating the human body from the differential signal input from the low-frequency detection filter 15.

  The human body detection means 18 a is a circuit that detects the approach or separation between the toilet body 2 and the human body based on the difference signal input from the human band detection filter 18 and inputs a signal indicating the detection state to the CPU 13.

  The LED drive circuit 20 is a circuit that turns on or off the LED 9 based on a signal input from the CPU 13.

  The valve drive circuit 21 is a circuit that opens and closes the valve 4 based on a signal input from the CPU 13.

  The CPU 13 performs drive control of the LED drive circuit 20 and the valve drive circuit 21 based on signals indicating detection states respectively input from the urine flow detection means 16a, the accumulated water detection means 17a, and the human body detection means 18a. In addition, it controls the energization of the silver electrode 6 and functions as a control means for controlling the operation of the entire toilet bowl cleaning device 1.

  The storage means 23 stores the ROM for storing the operation program of the CPU 13 in advance, and whenever the flush water is supplied to the toilet body 2 by controlling the opening of the valve 4 by the CPU 13, the stored water detection means 17a at that time And a RAM for storing the respective detection states.

  Further, the CPU 13 includes a timer inside, and by this timer, the time from the last use of the toilet bowl cleaning device 1 to the next use is measured in the later-described washing control unit processing flow. I have to.

  Hereinafter, control of the toilet bowl cleaning apparatus 1 by the cleaning control unit 7 configured as described above will be specifically described with reference to FIGS. 4 and 5.

  Here, FIG. 4 shows low-frequency detection during the period from when the user uses the toilet bowl cleaning device 1 for small use to when the drain pipe 8 connected to the toilet body 2 is detected to be clogged. The waveform LPF of the differential signal output from the filter 15 and the waveform BPF of the differential signal output from the urinary flow band detection filter 16 are shown, and the valve drive circuit 21 corresponding to these waveforms LPF and BPF in time. It is explanatory drawing which each showed the detection state of the human body detection means 18a, the urine flow detection means 16a, and the accumulated water detection means 17a.

  FIG. 5 is a flowchart showing the control operation of the cleaning control unit 7 according to this embodiment.

  When the toilet cleaning device 1 is powered on, first, the Doppler sensor 5 transmits a microwave that is a radio wave having a predetermined frequency, receives a reflected wave of the microwave, and receives the frequency and reception of the transmitted microwave. A difference signal having a frequency different from the frequency of the reflected wave is generated and input to the cleaning control unit 7.

  The transmission / reception of the microwave and the generation of the difference signal by the Doppler sensor 5 can be performed continuously while the power source is turned on, but intermittently under the control of the cleaning control unit 7. Also good.

  At this time, the Doppler sensor 5 is configured to transmit a microwave toward the ball 2a or the trap 2b of the toilet body 2. However, since the microwave is a radio wave as described above, the Doppler sensor 5 has a predetermined spread. It is further transmitted into the toilet space, and as a result, it is reflected on the urine flow of the user or user approaching the toilet body 2, and this reflected wave is also received by the Doppler sensor 5.

  In the washing control unit 7, based on the frequency and amplitude of the difference signal input from the Doppler sensor 5, the human body detection means 18a detects the approach or separation of the user from the toilet body, and the urine flow detection means 16a detects the urine flow. The presence or absence of water is detected, and the accumulated water detection means 17a detects the fluctuation of the accumulated water surface.

  The detection states of the human body detection means 18a, the urine flow detection means 16a, and the accumulated water detection means 17a are all converted into predetermined signals and input to the CPU 13.

  That is, in the cleaning control unit 7, the detected state is monitored by the CPU 13 while the power is on.

  In such a state where the power is turned on, the CPU 13 continuously or intermittently determines whether the user (human body) has approached the toilet bowl cleaning device 1 (step S1). . At this time, the CPU 13 transmits a command signal that causes the difference signal to be input to the human band detection filter 18 to the switching means 19.

  At this time, in the cleaning control unit 7, when the human body detection means 18 a receives a difference signal with a frequency of 0 to 40 Hz indicating the approach of the human body from the human band detection filter 18 for a predetermined time, a signal that becomes High (active state) is sent to the CPU 13. I try to input.

  Then, the CPU 13 determines that the human body has approached when the signal input from the human body detection means 18a becomes High, and moves the process to Step S2. The signal input from the human body detection means 18a is Low (inactive). In the state), it is determined that the human body is not in close proximity, and the process proceeds to step S3.

  In step S <b> 3, the CPU 13 refers to an internal timer to determine whether or not a predetermined time (for example, 1 hour) has elapsed since the last opening of the valve 4, and the predetermined time has elapsed. If it is determined that there is not, the process returns to step S1, and if it is determined that a predetermined time has elapsed, the process proceeds to step S4.

  In step S4, the CPU 13 sends a command signal for opening the valve 4 to the valve driving circuit 21 for a predetermined time, thereby opening the valve 4 for a predetermined time (for example, 2 s) and supplying flush water to the toilet body 2. After the supply, the valve is closed, and then the process proceeds to step S8.

  In step S2, the CPU 13 sends a command signal for opening the valve 4 to the valve drive circuit 21 for a predetermined time, thereby opening the valve 4 for a predetermined time (for example, 2 seconds) and washing the toilet body 2 with the command signal. After supplying water, the valve is closed, and then the process proceeds to step S5 (see time t1 in FIG. 4).

  In this embodiment, the CPU 13 is set to perform the process of step S2 (pre-cleaning process) for cleaning the toilet prior to the user's urination when it is determined that the human body has approached. It can be set not to perform this pre-cleaning process by operating an external switch.

  In step S5, the CPU 13 determines whether or not the detection of the urine flow of the user has been completed. If it is determined that the detection of the urine flow has not been completed, the CPU 13 repeatedly performs this process (step S5), If it is determined that the flow detection has been completed, the process proceeds to step S6.

  At this time, in the washing control unit 7, the urine flow detection unit 16 a becomes High while receiving a differential signal having a frequency of 80 to 180 Hz indicating the urine flow from the urine flow band detection filter 16, and becomes Low while not receiving. A signal is input to the CPU 13.

  Then, the CPU 13 determines that the detection of the urine flow has not ended while the signal input from the urine flow detection means 16a is High (see time t2 to t3 in FIG. 4), and performs the process. Returning to S1, it is determined that the detection of the urine flow has ended when the signal input to the urine flow detection means 16a is switched from High to Low, and the process proceeds to Step S6.

  In step S6, the CPU 13 determines whether or not the user has separated from the toilet bowl cleaning device 1, repeats this process (step S6), and moves the process to step S7 when determining that the user has separated.

  At this time, the CPU 13 determines that the user has not moved away from the toilet bowl cleaning device 1 while the signal input from the human body detection unit 18a is in the high state, and the signal input from the human body detection unit 18a is from High to Low. It is determined that the user has moved away when switching to (see time t4 in FIG. 4).

  In step S <b> 7, the CPU 13 sends a command signal for opening the valve 4 to the valve drive circuit 21 for a predetermined time, thereby opening the valve 4 for a predetermined time (for example, 10 s) and supplying flush water to the toilet body 2. After supplying and washing the toilet bowl, the valve is closed, and then the process proceeds to step S8 (see times t4 to t5 in FIG. 4).

  In step S8, the CPU 13 detects the degree of shaking of the water surface in the bowl 2a or the trap 2b of the toilet body 2, stores the degree in the storage means 23, and moves the process to step S9.

  At this time, in the cleaning control unit 7, the amplitude of the difference signal having a frequency of 0 to 15 Hz, which indicates that the accumulated water detection means 17 a indicates the fluctuation of the accumulated water surface in the ball 2 a or the trap 2 b from the in-ball water detection filter 17, exceeds a predetermined amplitude. During this time, a signal that is High is input to the CPU 13 (see time t6 to t7 in FIG. 4), and data indicating the amplitude of the differential signal at this time is input to the CPU 13.

  Then, the CPU 13 detects the shaking of the water surface and its degree based on the amplitude of the difference signal, and then writes the data indicating the amplitude of the difference signal in the RAM inside the storage means 23, and then step S9. The process is performed.

  Further, every time the valve 4 is opened in steps S4 and S8, the CPU 13 sequentially writes data indicating the amplitude of the differential signal into the RAM, and cumulatively stores the data in the RAM. Yes.

  In step S9, the CPU 13 determines whether or not the drain pipe 8 connected to the toilet body 2 is clogged. If it is determined that the drain pipe 8 is not clogged, the process proceeds to step S15 and determines that the drain pipe 8 is clogged. If so, the process proceeds to step S10.

  At this time, the CPU 13 determines that the drain pipe 8 is clogged when the amplitude of the differential signal stored in the RAM in step S8 is equal to or greater than a predetermined threshold, and the amplitude of the differential signal is less than the predetermined threshold. In this case, it is determined that the drain pipe 8 is not clogged.

  As described above, the toilet cleaning device 1 according to the present embodiment opens the valve 4 to supply cleaning water to the toilet body 2 and the frequency of the radio wave transmitted to the trap 2b or the ball 2a of the toilet body 2 Generating a differential signal from the difference between the frequency of the reflected wave and the frequency of the reflected wave, detecting a swing of the water surface in the trap 2b or the ball 2a based on the frequency and amplitude of the differential signal, Since it is configured to detect the clogging of the drain pipe 8 by detecting the clogging of the drain pipe 8 based on the detection result, the clogging of the drain pipe can be reliably detected and the pipe is clogged. When flush water is supplied to the toilet in the state, and there is no problem of overflow of flush water from the toilet, and other toilets that share the drain pipe are used and sewage is discharged to the drain pipe So However, there is no problem that wasteful washing water is supplied to the toilet.

  In step S10, the CPU 13 turns on the LED 9 by transmitting a command signal for turning on the LED 9 to the LED drive circuit 20, and confirms that the drain pipe 8 is clogged, such as a contractor or a user of the toilet cleaning device 1. To inform you.

  Thereafter, the CPU 13 compares the data indicating the amplitude of the differential signal stored in the RAM in step S8 with the data indicating the amplitude of the differential signal previously stored in the RAM, and the amount of shaking of the stored water surface changes. It is determined whether or not there has been (step S11).

  Here, the CPU 13 determines that the clogging of the drainage pipe 8 has not been eliminated even if the cleaning water containing silver ions described later is supplied when there is no change in the amount of shaking of the stored water surface, and the valve drive circuit 21. Thereafter, by transmitting a command signal for preventing the valve from being opened, the valve 4 is controlled to be closed (step S13), and the process is terminated.

  On the other hand, when there is a change in the amount of shaking of the stored water surface in step S11, the CPU 13 determines whether or not the amount of shaking has increased from the previous time (step S12), and determines that it has not increased. In addition, when it is determined that the clogging of the drain pipe 8 has been reduced by supplying cleaning water containing silver ions, which will be described later, the process proceeds to step S15. It is determined that the clogging of the drain pipe 8 has not been reduced by the supply of water, and the process proceeds to step S14.

  In step S <b> 14, the CPU 13 updates the setting of the time for energizing the silver electrode 6 and the time for opening the valve 4 simultaneously with this energization to be longer than the previous time (for example, twice the previous time). The process moves to step S15.

  In step S15, the CPU 13 performs energization control for energizing the time silver electrode 6 set in step S14, and transmits a command signal for opening the valve 4 for the same time as the energization time to the valve drive circuit 21. Thus, the cleaning water containing silver ions is supplied to the toilet body 2 to dissolve the urine stone which is expected to be the cause of the clogging of the drainage pipe 8 and to control the clogging of the drainage pipe 8.

  If the CPU 13 determines in step S12 that the amount of shaking of the stored water surface has not increased, the CPU 13 energizes the silver electrode 6 for the previously set time, and turns on the valve 4 for the same time as the energization time. Control is performed to open the valve.

  Next, the CPU 13 turns off the LED 9 by transmitting a command signal for turning off the LED 9 to the LED drive circuit 20 (step S16), and then performs cleaning control from the period S1 to S16 during which the power is turned on. The part processing flow is repeated.

  Further, in the present embodiment, a switching unit 19 is provided in the cleaning control unit 7, and the difference signal output from the low-frequency detection filter 15 by the switching unit 19 is transmitted between the ball unit water detection filter 17 and the human band detection filter 18. Although switching is performed so as to input to either one, the switching means 19 can be omitted by using the following human band detection filter.

  That is, as a human band detection filter, by using a band-pass filter circuit that allows only a difference signal in the vicinity of the frequency band of 15 to 40 Hz to pass, the accumulated water detection means 17a includes the difference signal output by the low-frequency detection filter 15, The shaking of the water surface can be detected by a difference signal with a frequency in the vicinity of 0 to 15 Hz, and the human body detection means 18a can detect the approach or separation of the human body by a difference signal with a frequency in the vicinity of 15 to 40 Hz.

  As a result, the switching means 19 can be provided in the cleaning control unit 7, and the manufacturing cost of the toilet cleaning device 1 can be reduced.

  In the present embodiment, the case where a urinal is used as the toilet bowl 2 as shown in FIG. 1 has been described as an example. However, the present invention is not limited to this, and is small and large. It can also be applied to style toilets that can be used for both purposes.

It is explanatory drawing which shows the toilet bowl washing | cleaning apparatus which concerns on embodiment of this invention. It is a block diagram which shows a Doppler sensor. It is a block diagram which shows a washing | cleaning control part. It is explanatory drawing which shows the control action of a washing | cleaning control part. It is a flowchart which shows the control operation of a washing | cleaning control part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet bowl washing device 2 Toilet bowl body 2a Ball 2b Trap 2c Spreader 3 Water supply pipe 4 Valve 5 Doppler sensor 6 Silver electrode 7 Cleaning control part 8 Drain pipe 9 LED
DESCRIPTION OF SYMBOLS 10 Transmission circuit 11 Reception circuit 12 Difference detection circuit 13 CPU
DESCRIPTION OF SYMBOLS 14 Amplification circuit 15 Low-pass detection filter 16 Urine flow band filter 16a Urine flow detection means 17 Ball part water detection filter 17a Reserved water detection means 18 Human band detection filter 18a Human body detection means 19 Switching part 20 LED drive circuit 21 Valve drive circuit 23 Storage means

Claims (9)

A valve that can supply flush water to the toilet, a control unit that opens or closes the valve, and a Doppler sensor that generates a difference signal from the difference between the frequency of the transmitted radio wave and the frequency of the reflected wave. In the toilet cleaning device provided,
Based on the frequency and amplitude of the differential signal generated by the Doppler sensor, comprising a water storage detection means for detecting a shaking of the water surface in the trap or ball of the toilet,
The toilet cleaning device according to claim 1, wherein the control unit performs control according to a detection state of the accumulated water detection unit after performing valve opening control of the valve.   A silver electrode is provided in the washing water supply flow path, and the control means performs energization control to the silver electrode as control according to the detection state of the accumulated water detection means, and the toilet bowl contains silver ions. The toilet cleaning device according to claim 1, wherein water is supplied.   The toilet bowl cleaning apparatus according to claim 2, wherein the control means energizes the silver electrode for an energization time according to a detection state of the accumulated water detection means. Each time the cleaning water is supplied by controlling the valve, the storage means for storing the detection state of the accumulated water detection means, respectively,
The said control means controls the said valve | bulb so that the supply_amount | feed_rate of the next washing | cleaning water may be increased, when it determines with there being no change in the said several detection state memorize | stored in the said memory | storage means. 4. The toilet bowl cleaning apparatus according to any one of items 3.   When the control means determines that the detection state of the accumulated water detection means is a predetermined amount or more of shaking of the accumulated water surface after opening the valve, as control according to the detection state of the accumulated water detection means, The toilet cleaning device according to any one of claims 1 to 4, wherein valve closing control of the valve is performed, and supply of the washing water is stopped. Based on the frequency of the difference signal generated by the Doppler sensor, human body detection means for detecting the approach or separation between the toilet and the human body,
Urine flow detection means for detecting urine flow based on the frequency of the difference signal generated by the Doppler sensor,
6. The control device according to claim 1, wherein the control means opens the valve according to a detection result of the urine flow detection means or the human body detection means, and supplies the flush water to the toilet. The toilet cleaning device according to claim 1.   7. The control device according to claim 1, wherein when the toilet cleaning device is not used for a certain period of time, the control unit opens the valve and supplies the cleaning water to the toilet. Toilet bowl cleaning device. Informing means for informing the clogging of the drain pipe connected to the toilet,
8. The control device according to claim 1, wherein when the clogging of the drain pipe is detected based on a detection state of the accumulated water detection unit, the control unit performs control to notify the notification unit. The toilet bowl cleaning device according to item. A drain pipe clogging detection method in a toilet flushing apparatus for supplying flush water to a toilet by opening and closing a valve and washing the inside of the toilet,
Opening the valve to supply wash water to the toilet;
Generating a difference signal from the difference between the frequency of the radio wave transmitted to the trap or ball of the toilet and the frequency of the reflected wave;
Detecting the fluctuation of the water surface in the trap or in the ball based on the frequency and amplitude of the differential signal;
Detecting clogging of the drain pipe based on the detection result of the water surface fluctuation;
A drainage tube clogging detection method characterized by comprising:

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