JP2002173966A - Toilet bowl washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toilet bowl washing device capable of continuously supplying a small quantity of wash water while eliminating operation time for the supply of wash water before and after the stop of wash water by an operating means. SOLUTION: This toilet bowl washing device is provided with a human body detecting sensor which outputs a detection signal when detecting the approach of a user to a toilet bowl; an operating means which outputs a washing instruction signal for instructing the supply quantity of wash water to the toilet bowl by specified operation; a washing control means which outputs a control signal for instructing the supply quantity and/or timing of wash water to the toilet bowl on the basis of the detection signal and washing instruction signal; and a wash water supply means for supplying the toilet bowl with wash water on the basis of the control signal. The washing control means instructs the specified supply of wash water to the wash water supply means when there is a change in the supply quantity of wash water to the toilet bowl on the basis of the washing instruction signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detection sensor for outputting a detection signal when a user approaches a toilet and a cleaning instruction for instructing the amount of cleaning water supplied to the toilet by a predetermined operation. Operating means for outputting a signal, washing control means for outputting a control signal for instructing a supply amount and / or timing of washing water to the toilet based on the detection signal and the washing instruction signal, and a toilet based on the control signal And a flush water supply unit for supplying flush water to the toilet bowl.

[0002]

2. Description of the Related Art Conventionally, as this type of toilet flushing device, for example, the one disclosed in Japanese Patent No. 2805126 is described in detail as follows. The toilet cleaning device includes a human body detection sensor that outputs a detection signal when a user approaches the toilet, a cleaning water supply unit that supplies cleaning water to the toilet based on the detection signal, and a toilet that is operated by a predetermined operation. Since the operating means for stopping the supply of the washing water to the toilet is provided, if the user operates the operating means even when the user is detected, the washing water is not supplied into the toilet. For this reason, since the supply of the washing water can be stopped when the toilet is cleaned, it is possible to prevent the washing water from being supplied and the washing water from being frequently supplied, and the tap water from being wasted.

[0003]

In cleaning a toilet, flush water is supplied to the toilet before it is polished with a sponge, a brush, or the like so that the toilet can be easily cleaned. After rubbing with a sponge, a brush or the like, rinsing is performed by supplying cleaning water to the toilet. For cleaning with a conventional toilet flushing device, first supply the flushing water to the toilet, stop the supply of flushing water by operating means, polish it with a sponge, brush, etc., then supply the flushing water to the toilet again and rinse it. Therefore, there is a problem that the operation of supplying the cleaning water is troublesome. In addition, cleaning could not be performed while continuously supplying a small amount of cleaning water. The present invention has been made in order to solve the above-described problems, and an object of the present invention is to eliminate the trouble of operating the supply of cleaning water generated before and after the stoppage of the cleaning water by the operating means and to continuously reduce the amount of cleaning water. An object of the present invention is to provide a toilet flushing device that can be supplied to a toilet bowl.

[0004]

Means for Solving the Problems To solve the above-mentioned problems, the invention according to claim 1 comprises a human body detection sensor for outputting a detection signal when the approach of a user to the toilet is detected, and a predetermined operation. Operating means for outputting a washing instruction signal for instructing a flush water supply amount to the toilet, and a control signal for instructing a flush water supply amount and / or timing to the toilet based on the detection signal and the flush instruction signal And a washing water supply means for supplying washing water to the toilet based on the control signal, wherein the washing control means has a change in the amount of washing water supplied to the toilet based on the washing instruction signal. At this time, it is characterized in that the supply of predetermined cleaning water is instructed to the cleaning water supply means.

According to a second aspect of the present invention, the cleaning control means changes the cleaning water supply amount before the change when a predetermined time elapses after the cleaning water supply amount to the toilet is changed based on the cleaning instruction signal. It is characterized by returning automatically.

According to a third aspect of the present invention, the cleaning control unit instructs the cleaning water supply unit to supply a predetermined cleaning water when the cleaning water supply amount automatically returns. .

According to a fourth aspect of the present invention, the amount of flush water supplied to the toilet based on the flush instruction signal is changed from a predetermined amount to zero.

The invention according to claim 5 is characterized in that the amount of flush water supplied to the toilet based on the flush instruction signal is changed from a predetermined amount to a smaller amount than the predetermined amount.

According to a sixth aspect of the present invention, when the amount of flush water supplied to the toilet is changed based on the flush instruction signal, the user is informed that the amount of flush water supplied to the toilet is changed. It is characterized in that an informing means for informing is provided.

The invention according to claim 7 is characterized in that the notifying means is a light emitting means.

In the invention according to claim 8, the operating means comprises a plurality of contact-type operating means operated by touching by a user, and a plurality of non-contact-type operating means operable without touching by the user. The feature is that.

[0012] According to a ninth aspect of the present invention, the change of the flush supply amount to the toilet is performed by the contact type operation means, the non-contact type operation means, or the contact type operation means and the non-contact type operation means. It is characterized in that either one of them can be selected.

[0013] The invention according to claim 10 is characterized in that the change of the amount of washing supplied to the toilet is performed only by the contact-type operation means.

[0014]

According to the first aspect of the present invention, a human body detection sensor that outputs a detection signal when a user approaches the toilet is detected, and the amount of flush water supplied to the toilet is specified by a predetermined operation. Operating means for outputting a washing instruction signal for
Cleaning control means for outputting a control signal for instructing a supply amount and / or timing of the flush water to the toilet based on the detection signal and the flush instruction signal, and flush water for supplying the flush water to the toilet based on the control signal Supply means, and the washing control means, when there is a change in the amount of washing water supplied to the toilet based on the washing instruction signal, instructs the washing water supply means to supply a predetermined washing water, so that the operating means Since a predetermined amount of washing water is supplied to the toilet when the amount of washing water supplied to the toilet is changed, a washing water supply operation that occurs before and after the user operates the operating means when the user cleans the toilet. Can be eliminated.

According to a second aspect of the present invention, the washing control means changes the washing water supply amount before the change when a predetermined time elapses after the washing water supply amount to the toilet is changed based on the washing instruction signal. After the user cleans the toilet, the user does not have to perform the operation to return to the toilet automatically, and the user can use the toilet as usual after a predetermined time has elapsed even if the user forgets to return. It becomes possible.

According to a third aspect of the present invention, the cleaning control means instructs the cleaning water supply means to supply a predetermined cleaning water when the cleaning water supply amount automatically returns. After cleaning the toilet, the user does not have to perform the operation of supplying the flush water for rinsing, and the flush water can be supplied to the toilet even if the user forgets the flush water supply operation.

According to the fourth aspect of the present invention, the amount of flush water supplied to the toilet based on the flush instruction signal is changed from a predetermined amount to zero, so that the user can use the detergent when cleaning the toilet. However, it is possible to prevent the detergent from being washed away and the washing water from being wasted.

According to a fifth aspect of the present invention, since the amount of flush water supplied to the toilet based on the flush instruction signal is changed from a predetermined amount to a smaller amount than the predetermined amount, when the user cleans the toilet, Since the toilet can be cleaned while continuously supplying a small amount of cleaning water to the toilet, the cleaning becomes easy and the cleaning water can be relatively saved.

According to a sixth aspect of the present invention, when the amount of flush water supplied to the toilet is changed based on the flush instruction signal, the user is informed that the amount of flush water supplied to the toilet is changed. By providing the notification means for notifying, it is possible to make the user aware that the toilet is in a state where normal cleaning is not performed.

In the invention according to claim 7, since the notification means is a light emitting means, it is possible for the user to easily recognize even in a relatively dark toilet. In addition, it is possible to make the recognition easier by blinking the light emission.

According to the invention described in claim 8, the operating means comprises a plurality of contact-type operating means operated by touching by a user and a plurality of non-contact-type operating means operable without touching by the user. Therefore, the flush water can be supplied to the toilet without the user touching the operation means, which is sanitary.

According to the ninth aspect of the present invention, the supply of flush water to the toilet is changed by contact type operating means, non-contact type operating means, or both contact type operating means and non-contact type operating means. Since the user can select one of them, it is possible to match the usage state of the toilet bowl of the user.

According to the tenth aspect of the present invention, the cleaning water supply amount to the toilet is changed only by the contact-type operation means. Since the water supply amount is not changed, useless washing can be avoided.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of the present invention will be described below. FIG. 1 shows a flush toilet 1 according to the present embodiment.
FIG. The flush toilet 10 includes a toilet body 20.
This is a so-called water supply direct connection type that does not include a separate washing water tank, and performs rim cleaning and jet cleaning. Further, the flush toilet 10 is a low silhouette type having a simple design in which the upper part is kept low. FIG. 2 is a longitudinal sectional view of the flush toilet 10, and FIG. 3 is a sectional view showing the toilet body 20 and the like. As shown in FIG.
The flush toilet 10 includes a ceramic toilet body 20 on which the toilet seat 12 and the toilet lid 14 are placed, a trap drain pipe 30 formed integrally with the toilet body 20, and a resin drain socket connected to the trap drain pipe 30. 50 and a valve unit 60 housed in the rear part of the toilet main body 20.

Next, the configuration of each part of the flush toilet 10 will be described. The flush toilet 10 is provided with a bowl portion 22 in a ceramic toilet body 20 as shown in FIG. Even when the flush toilet 10 is not flushed, the peripheral wall of the bowl 22 is
, And an exposed surface 22b that does not contact the reservoir RW when the flush toilet 10 is not flushed.

The bottom of the bowl 22 is provided with a recess 23 for dropping waste, and an entrance 31 of the trap drainage pipe 30 is opened in the back wall. Further, as shown in FIG. 2, a jet nozzle 25 is disposed on the front wall of the dirt dropping recess 23 so as to face the inlet 31 of the trap drain pipe 30 so as to face the jet nozzle 25. The jet connection pipe 27 connected to the valve unit 60 is connected to the jet nozzle 25. When the washing water is supplied to the jet connecting pipe 27 through the valve unit 60, the washing water is discharged from the jet nozzle 25, and the waste in the bowl 22 is discharged to the trap drain pipe 30 to wash the bowl 22. ,
So-called jet cleaning is performed.

As shown in FIG. 3, a rim water passage 28 for discharging the washing water along the inner wall surface of the bowl portion 22 is provided at a peripheral edge of the upper opening of the bowl portion 22. The upstream side of the rim water passage 28 is connected to a valve unit 60 via a rim connection pipe (not shown).
A plurality of rim water outlets 28a are formed in the lower part of the rim. When the washing water is supplied to the rim connecting pipe 29 through the valve unit 60, the washing water is discharged from the plurality of rim water outlets 28a, and so-called rim washing for washing the inner wall surface of the bowl portion 22 is performed. .

As described above, the trap drain pipe 30 has its inlet 31 opened to the dirt drop recess 23 provided at the bottom portion of the bowl portion 22, and extends from the inlet 31 along the back surface of the bowl portion 22. A rising path 32 that extends obliquely upward toward the rear of the toilet body 20 and a descending path 33 that extends substantially vertically downward from the upper end of the rising path 32 are provided. The descending path 33 is connected via a drain socket 50 to a drain pipe Po that is set up from the floor surface at the place where the toilet is installed.

Returning to FIG. 2, a storage chamber 40 closed by a cover 41 is integrally provided at the rear of the toilet body 20. In the storage chamber 40, the valve unit 60 and the electronic control circuit 80 are stored. FIG. 4 is a plan view of the toilet body 20 with the cover 41 removed. The valve unit 60 is a valve mechanism for controlling the supply of cleaning water for performing rim cleaning and jet cleaning in the bowl portion 22, and has a water supply system shown in FIG.

The valve unit 60 is, as shown in FIG.
A branch pipe 61 with a water-stop function, which is connected to a water pipe Pw as a water supply source installed in the toilet room via a nipple Pn, and is connected to the nipple Pn, and a water stopcock 62.
, A constant flow valve 63, an on-off valve 64, a switching valve 70, and a vacuum breaker 78A and a vacuum breaker 78B branched from the switching valve 70. In the branch connection pipe 61 with a water stop function, the nipple Pn and the inflow port 61a are connected, and one outflow port 61b is connected to the water stopcock 62,
The other outlet 61c can be connected to a toilet seat side water supply pipe that supplies flush water to the warm water flush toilet seat. As described above, the branch connection pipe 61 connects the pipe to the hot water flush toilet seat side by effectively using the space inside the flush toilet 10 in addition to supplying the flush water to the bowl portion 22 and performing the pipe connection. Easy going. The constant flow valve 63 keeps the flow rate of the washing water passing through the constant flow valve 63 irrespective of the pressure of the water supply source, and the opening / closing valve 64 receives the control signal for starting cleaning or stopping water by the electronic control circuit 80. The switching valve 70 opens or closes, and receives the control signal output by the electronic control circuit 80, and switches the discharge destination of the washing water to the rim-side port 70a or the jet-side port 70b. The vacuum breaker 78A and the vacuum breaker 78B are connected to the jet nozzle 25 via a rim water passage 28 and a jet connection pipe 27 via a rim connection pipe 29, respectively, and are connected to the rim side port 70a or the jet connection pipe 27. When a negative pressure is generated, air is introduced to each,
Implement so-called negative pressure destruction.

In the flush toilet 10, the valve unit 60 and the electronic control circuit 80 directly connected to the water pipe Pw are provided.
Is stored in the storage chamber 40 of the toilet body 20 integral with the bowl portion 22, so that the valve unit is provided around the toilet body 20 and on the wall surface of the toilet room as compared with the case where the valve unit 60 is installed separately. The space for installing the toilet 60 is not required, and the flush toilet 10 itself can be made compact. Furthermore, the valve unit 6
The work of assembling the toilet unit 20 into the toilet body 20 can be performed in advance at the time of shipment from the factory, which not only facilitates the packing operation and the transport operation, but also allows the valve unit 60 to be separated from the flush toilet 10 separately from the toilet. It does not need to be installed in a room and has excellent workability.

FIG. 6 is a block diagram showing an electronic control circuit 80 for controlling the drive of the valve unit 60. The electronic control circuit 80 includes a central control unit 80a composed of a microcomputer. The input terminals of the electronic control circuit 80 are connected to a dip switch DSW, an operation switch 91, two remote controllers 92, 92, a human body detection sensor 100, and the like. Further, a valve unit driving section 82 for driving the valve unit 60 is connected to the output terminal.

The central control unit 80a includes an arithmetic processing unit,
It has a storage unit and an input / output unit. The storage unit stores a control program, data necessary for processing, and the like. Examples of the data stored in the storage unit include data set by a dip switch DSW and a program indicating a sequence of a cleaning process. Note that these data and programs will be described later.

The electronic control circuit 80 is supplied with 24 V from the external commercial power supply via the DC converter 83 to the valve unit drive unit 82 and 5 V to the central control unit 80 a. The power supply to the electronic control circuit 80 is performed by connecting a connector to the terminal block 93. The terminal block 93 is capable of connecting a plurality of connectors by one-touch insertion, and includes a connector for supplying power to the electronic control circuit 80 and a spare connector for connecting to another electric device. . The spare connector can be used, for example, to supply power to the hot water flush toilet seat and the like, whereby wiring from the outer periphery can be omitted separately from the hot water flush toilet seat to facilitate wiring.

Next, an operation switch 91, a remote controller 92, and a human body detection sensor 100 will be described as means for driving the valve unit 60 to start cleaning.

As shown in FIG. 1, the operation switch 91 is
The toilet unit 20 is supported by an operation unit 90 protruding from an upper portion thereof. That is, the operation unit 90 includes a holding body 90 a protruding from the side of the toilet main body 20.
The operation switch 91 is held with an inclination such that the operation surface faces upward and the front is lowered. The operation switch 91 has a built-in lamp that can be turned on and blinked. The upper surface of the operation unit 90 and the periphery thereof are formed of a heat-resistant resin, and have a protection function so as not to be damaged by a cigarette or the like.

Returning to FIG. 6, the remote controller 92,
Reference numeral 92 denotes a built-in infrared-reflective sensor including a light-emitting element and a light-receiving element that output when the user of the flush toilet 10 approaches or approaches the remote controller 92, 92. . With this configuration, the user can wash the flush toilet 10 without touching the remote controllers 92, 92, which is sanitary. Further, the remote controller 9
Numerals 2 and 92 are respectively attached to the side walls of the toilet room on both sides of the flush toilet 10, wired inside the wall and connected to the electronic control circuit 80 by wires. By installing the remote controllers 92 at a plurality of locations in this manner, the operation can be easily performed even by the elderly and the physically handicapped. Further, by connecting the remote controllers 92, 92 with wires, it is possible to prevent inoperability due to running out of battery such as a battery type.

Further, as shown in FIG. 1, the human body detecting sensor 100
It is mounted at a position distant to the left. The human body detection sensor 100 is an infrared reflective sensor composed of a light-emitting element and a light-receiving element, that is, when the user of the flush toilet 10 approaches or sits on the toilet seat 12 for toilet, The sensor detects the human body by outputting the fact.

The washing start means such as the operation switch 91 is input to the arithmetic processing unit via the input / output unit,
Here, the valve unit 60 is controlled by transmitting a control signal which is subjected to arithmetic processing to the valve unit driving unit 82 and the like.

The dip switch DSW shown in FIG.
Is composed of a 4-bit switch. FIG. 7 is an explanatory diagram for explaining setting values set by the dip switches DSW. The dip switch DSW is used for automatic cleaning and adjusting a cleaning pattern, a flow rate, and the like. The first bit is used to set whether or not automatic cleaning is performed, and the second bit is used to select and set the large cleaning / small cleaning switching time between 120 seconds and 90 seconds. The setting of automatic cleaning is a setting as to whether or not to start cleaning based on a detection signal from the human body detection sensor 100. The setting of the switching time between the large washing and the small washing is a setting for determining whether the washing is a large washing or a small washing after the human body detection sensor 100 detects the human body. This is the setting of the determination time for determining whether the cleaning is large or when 90 seconds or more have elapsed.

The combination of the third and fourth two bits sets the amount of washing water for four sets of large washing and small washing. That is, four sets of washing patterns of large washing 8 liters / small washing 6 liters, large washing 6 liters / small washing 6 liters, large washing 10 liters / small washing 6 liters, and large washing 8 liters / small washing 8 liters Can be set.

Next, a series of operations in the washing process in the flush toilet 10 will be described with reference to FIG. FIG. 8 is a timing chart illustrating the cleaning process.

Now, the central control unit 80 of the electronic control circuit 80
When it is determined that the condition for starting the toilet flushing is satisfied based on the detection signal from the human body detection sensor 100 or the like, the open / close valve 64 is opened, and the supply destination of the flush water to the switching valve 70 is connected to the rim connection pipe 29. Command to switch. As a result, the cleaning water that has passed through the on-off valve 64 is guided to the rim water passage 28 via the rim connecting pipe 29, and the pre-rim cleaning is started. That is, the supply cleaning water is discharged from the rim water outlet 28a of the rim water passage 28 along the inner wall surface of the bowl portion 22,
The inner wall surface of the bowl 22 is cleaned. At this time, as shown by the solid line in FIG. 8, the amount of washing water is represented from time t0 to time t1.

After the completion of the pre-rim cleaning, the central control unit 8
0a switches the supply destination of the washing water to the jet connection pipe 27 by the switching valve 70. As a result, the washing water that has passed through the on-off valve 64 is sent to the jet nozzle 25 via the jet connecting pipe 27, and is discharged from the jet nozzle 25. By such jet cleaning, waste is discharged as follows. That is, as shown in FIG.
The jet nozzle 25 is connected to the inlet 31 of the trap drain pipe 30.
It is arranged toward. For this reason, when the supply destination of the washing water is switched to the jet connecting pipe 27 by the switching valve 70 as described above, the jet nozzle 25 outputs a high water pressure substantially equal to the primary pressure (tap water supply pressure). The washing water flows out at high speed. As a result, the water level of the ascending path 32 rises, and when the bent portion from the ascending path 32 to the descending path 33 becomes full, the pressure difference between the washing water and the stored water in the bowl portion 22 causes the water to go downward. Is generated. With this drawing force, the washing water filled in the ascending path 32 and the washing water in the bowl portion 22 are led to the drain pipe Po through the drain socket 50 at once with the waste.
In this way, the siphon action is induced, and the washing water (dirty water) and filth in the bowl portion 22 are quickly discharged to the outside through the drain passage. At this time, as shown by the solid line in FIG. 8, the amount of washing water is represented from time t1 to time t2.

After the completion of the jet cleaning, the central control unit 80a switches the supply destination of the cleaning water to the rim connecting pipe 29 again by the switching valve 70. As a result, the cleaning water is guided again to the rim water passage 28, and the post-rim cleaning is started. At this time, the washing water flowing out from the rim water outlet hole 28a is stored in the bowl portion 22 as accumulated water, and waits for the next washing. At this time, as shown by the solid line in FIG. 8, the amount of washing water is represented from time t2 to time t3.

The water passage time in the washing process described with reference to FIG. 8 may be required to be appropriately changed depending on the installation location of the flush toilet 10, the preference of the user, laws and regulations, or the like. For example, when a large amount of washing water is required, such as in an apartment, when the amount of washing water is required to be 10 liters or more or 8 liters or less according to regulations, the amount of washing water is changed between large washing and small washing. There are cases where we want to save water. Such setting work is performed by the DIP switch DS shown in FIG.
This is performed by switching the set values of the third and fourth two bits of W. In this case, in order to save water, from the standard mode (Ws1 shown by a solid line), as shown by the dashed line Ws2 in FIG. By changing the time from the time point t2 to the time point t2a, a water saving mode in which waste is given priority can be taken. Also, as in the case of the small cleaning indicated by the wavy line Ws3, the time of the jet cleaning can be shortened by changing the time from the time t2 to the time t2b, so that a mode in which the post-rim cleaning, that is, the sealing is given priority can be adopted. This makes it possible to adjust the amount of washing water while maintaining appropriate conditions for the amount of washing water necessary for flowing waste, thereby realizing water saving.

FIG. 9 is a sectional view of the human body detection sensor 100 cut in the vertical direction. In FIG. 9, the human body detection sensor 1
00 includes a detection unit 111 and an attachment 112 for assembling the detection unit 111 to the toilet body. The detecting unit 111 includes a light emitting element 111 inside the casing 111a.
b and a light receiving element 111c, and a harness 111d
Power supply and signal output. This casing 11
A packing 114 is mounted on the front surface of 1a, and a glass plate 115 is held in a recess 114a of the packing 114. The glass plate 115 is formed of heat-resistant glass for preventing a cigarette from being damaged by fire or the like. The outer peripheral flange of the casing 111a is provided with a tapping screw 117.
To the decorative plate 116. The decorative plate 116 has an opening 116a.
A glass plate 115 is held in close contact with the inside.

FIG. 10 is a sectional view showing a state before the human body detection sensor 100 is assembled. In FIG.
2 is a fixing plate 11 arranged on the back side of the toilet body.
9 and a fixing plate 12 arranged on the front side of the toilet body
0 is provided. The fixing plate 119 has a mounting hole 119.
a, and an elastic locking piece 119b protruding from the mounting hole 119a is provided. The elastic locking piece 119b
The outer wall of the casing 111a is sandwiched. The fixing plate 120 has an opening 120a for inserting the casing 111a, and the upper and lower legs 12a.
At 0b, it is fixed to the fixing plate 119 with a screw 121 at a predetermined interval. Also, fixed plate 1
Waterproof packings 118a and 118b are mounted on both sides of the device 20. The waterproof packing 118a is attached to the toilet body,
The waterproof packing 118b seals the gap between the waterproof packing 118b and the decorative plate 116.

According to the human body detection sensor 100, since the decorative plate 116 covers the light emitting element 111b and the light receiving element 111c in a state where the decorative plate 116 is sealed to the outer wall of the toilet main body, water flows around the toilet main body. The light emitting element 111b and the light receiving element 111
By sealing c, failure can be prevented. Further, the glass plate 115 serves as the light emitting element 111b and the light receiving element 111b.
Since c is covered, it is possible to protect a portion having low mechanical strength as compared with the toilet body, and prevent the damage.

FIG. 11 is an explanatory view showing a state in which the human body detection sensor 100 is attached as viewed from the inside of the toilet body. FIG.
, The detection unit 111 is connected to the electronic control unit ECU via the harness 111d and the relay harness Cd. That is, the fixing magic tape (registered trademark) Tp1 is stuck to three places (one place in the drawing) on the inner skirt portion of the toilet body, and the relay harness Cd is further sandwiched and fixed by the fixing magic tape Tp2. Then, the detector 1
The 11th harness 111d is connected to the relay harness Cd by the connector Cn1. Thereby, the detection unit 111 is connected to the electronic control unit ECU.

FIG. 12 is an explanatory diagram for explaining a detection area by the human body detection sensor 100. In FIG. 12, a door Dr is attached to the front of the toilet body, and opens and closes as shown by a two-dot chain line. On the other hand, when the human body detection sensor 100 attached to the toilet body has a half-value angle θ of the light emitting element 111b of 30 °, when a person sits on the toilet seat or when a person stands in front of the flush toilet for urination. And its left foot F
The detection area DA is set to detect the vicinity of R.

Next, the detection operation of the human body detection sensor 100 arranged on the toilet body will be outlined with reference to FIG. FIG. 13 is a timing chart showing a detection signal by the human body detection sensor 100, and the vertical axis shows a signal level Vs from the light receiving element 111c. From time t0 to time t1, the toilet room is unmanned, the door opens at time t1,
2, a person is seated, and at this time, the signal level Vs is V
Assume that GL → Vs1 → Vs2. In this case, assuming that VGL is the background level, the deviation ΔVs of the signal level Vs is ΔV from time t1 to time t2.
Vs1 (= Vs1−VGL), and after time t2, it becomes ΔVs2 (= Vs2−VGL). And ΔV
s is compared with a threshold value Av, and when it exceeds this, it is determined that a human body has been detected. That is, at ΔVs1, the detection does not exceed the threshold Av, so that the human body detection is not determined. However, when ΔVs2 exceeds the threshold Av, the human body detection is determined.

Next, the washing operation processing of the flush toilet will be described. FIG. 14 is a flowchart illustrating the cleaning operation process. This processing is repeatedly executed every second. First, in step S100, it is determined based on the human body detection sensor 100 whether a condition for starting a cleaning operation is satisfied. This process is executed by another routine shown in FIG. 15, and when the condition is satisfied, the flag Fsw is set to 1. This processing will be described later. If it is determined in step S100 that the cleaning operation start condition is satisfied, the process proceeds to step S100.
The cleaning operation is performed in the processing from step 120 to step S140.

That is, Step S120, Step S
In step S124, the setting of the cleaning timer TWS, the setting of the inhibition timer TPH, and the reset of the cleaning timer TCL are executed. Subsequent step S126
, It is determined whether the ON timer TON is equal to or longer than a predetermined time (120 seconds). Here, the ON timer TON is
This is a timer that measures the ON time during which the human body detection sensor 100 has detected a human body in the routine shown in FIG. If the ON timer TON is equal to or longer than a predetermined time (120 seconds), large cleaning is performed in step S130, and if less than the predetermined time, small cleaning is performed in step S132. That is, either large washing or small washing is selected depending on the length of the detection time of the human body detection sensor 100.
The processing operation of the large cleaning and the small cleaning is based on a predetermined sequence, based on the pre-rim cleaning, the jet cleaning, and further,
Post rim cleaning is performed.

In the following step S134, the cleaning timer T
WS is subtracted, and it is determined in step S136 whether or not the cleaning termination condition is satisfied. here,
The cleaning termination condition is determined based on whether or not the post-rim cleaning has been completed. When it is determined in step S136 that the cleaning operation has been completed, the flag FWS is reset (step S137), and the ON timer TON and the OFF timer TOFF are reset (steps S138 and S140).

Here, the routine of the start condition of the cleaning operation shown in FIG. 15 will be described. First, step S101
, The detection signal Vs is read from the human body detection sensor 100, and in the next step S102, the human body detection sensor 10
The difference between the ground level VGL of 0 and the detection signal Vs, that is, the signal level ΔVs, is calculated.
At 3, it is determined whether or not the signal level ΔVs has exceeded a predetermined value Av. If it is determined in step S103 that the detection is affirmative, that is, the detection of a human body, the process proceeds to step S104, where the on-timer TON is incremented, and the off-timer TOFF is reset in step S106. Then, in the repetitive processing, the human body detection sensor 100
While there is a detection signal from, the ON timer TON continues to be incremented.

On the other hand, if it is determined in step S103 that a human body has not been detected, the process proceeds to step S108, where it is determined whether the off timer TOFF is equal to or less than a predetermined value (3 seconds). In step S108, the off timer TOFF
Is determined to be 3 seconds or less, the process proceeds to step S110, the on-timer TON is incremented by 1, and in step S112, the off-timer TOFF is incremented. That is, the human body detection sensor 100
If the human body is not detected for a short time after the human body is detected, for example, in order not to determine the end of the toilet when the user is sitting again on the toilet seat, the processing of the off timer TOFF is executed.

If it is determined in step S108 that the off timer TOFF is equal to or longer than 3 seconds, the process proceeds to step S108.
At 114, it is determined by the flag FWS whether or not cleaning is in progress.
If not, that is, if a human body has been detected, the process proceeds to step S118, and a flag FWS, that is, a flag indicating that a human body has been detected, is set.

Returning to FIG. 14, if it is determined in step S100 that the human body detection condition is not satisfied, the process proceeds to step S142, and it is determined whether or not the prohibited time is in progress. If it is determined that the time is within the prohibition time (1 second), the prohibition timer TPH is decremented in step S144. The prohibition timer TPH is a timer for prohibiting the cleaning operation. In other words, when the prohibition time has elapsed after the start of the cleaning process, the cleaning operation is not performed, and the repeated cleaning operation process is prevented from being repeated.

If it is determined in step S142 that it is not during the prohibition time, it is determined in step S146 whether or not the operation switch has been depressed.
Proceeding to step S120, a cleaning operation is performed. That is, even when the human body detection is not performed by the human body detection sensor 100, the pressing down of the operation switch by the human operation is prioritized, and the cleaning operation is performed.

If it is determined in step S146 that the operation switch has not been pressed, it is determined in step S148 whether or not the cleaning operation is being performed. If it is determined that the cleaning operation is being performed, step S134 is performed. The cleaning operation is continued until the termination condition is satisfied. On the other hand, step S14
If it is determined in step 8 that the cleaning operation is not being performed, the process proceeds to the cleaning process in step S150.

FIG. 16 is a flowchart illustrating the cleaning process in step S150. In FIG. 16, the processing from step S151 to step S166 is processing for cleaning the flush toilet and the toilet room, that is, detection by the human body detection sensor 100 even though the person is not using it for toilet. This is a process for preventing the flushing of the toilet based on the signal.

In step S151, it is determined whether or not the cleaning switch has been turned on. The determination of the ON operation of the cleaning switch is made, for example, on the condition that the operation switch is turned ON for 3 seconds or more. If it is determined in step S151 that the cleaning switch has been turned on, the cleaning mode flag Fcl is set, and step S152 is performed.
Then, the pre-rim cleaning is executed. In the pre-rim cleaning, the cleaning water is discharged from the rim water passage to wet the surface of the bowl portion and facilitate cleaning. Next, step S15
Proceeding to step 3, the lamp starts blinking, and the following step S15
At 4, the cleaning timer TCL is set. The cleaning timer TCL is a timer that presets the time required for cleaning the toilet and the like and stops the operation of cleaning the toilet for that time.

Next, in step S156, it is determined whether the mode is the cleaning mode. This step S156
In step S151, since the flag indicating the cleaning mode is set in step S151, the process proceeds to step S157.
In step S157, it is determined whether the cleaning switch has been turned off. The determination of the OFF operation of the cleaning switch is made, for example, on condition that the operation switch is pressed. If it is determined in step S157 that the cleaning switch has been turned off, the process proceeds to step S162 to end the blinking of the lamp, and then proceeds to step S164 to perform large cleaning. The large washing is a rinsing for discharging the detergent, dirt, and the like remaining in the bowl. Thereafter, in step S166, the cleaning mode flag Fcl is reset, and the cleaning mode ends.

If it is determined in step S157 that the cleaning switch has not been turned off, step S15
Move to 8. In step S158, the cleaning timer TC
L is subtracted, and it is determined in subsequent step S160 whether or not the cleaning mode has ended. The end of the cleaning mode is determined based on whether the set time of the cleaning timer TCL has elapsed. If it is determined in step S160 that the cleaning mode has not been completed, the process returns to the initial process without performing the human body detection process from step S101 to step S118. Then, in the repetitive processing, if it is determined in step S160 that the cleaning mode has ended while subtracting in step S158 through steps S150 and S156, the process proceeds to step S162 to stop the blinking of the lamp. Then, the process proceeds to step S164, where the large cleaning is performed. Thereafter, in step S166, the cleaning mode flag Fcl is reset, and the cleaning mode ends.

As described above, when the cleaning mode is set, since the human body detection processing is not performed so as not to detect the person to be cleaned, useless cleaning operation is avoided.

When the cleaning mode is set, no command other than the command to turn off the cleaning switch is accepted. That is,
Toilet cleaning is not performed even when a person to be cleaned approaches the remote controllers 92, 92, so that useless cleaning is avoided.

FIG. 17 is a flowchart for explaining another embodiment of the cleaning process in step S150. In FIG. 17, the processing from step S171 to step S186 is processing for cleaning the flush toilet, that is, processing for continuing rim cleaning regardless of the detection signal of the human body detection sensor 100.

At step S171, it is determined whether or not the cleaning switch has been turned on. The determination of the ON operation of the cleaning switch is made, for example, on the condition that the operation switch is turned ON for 3 seconds or more. If it is determined in step S171 that the cleaning switch has been turned on, the cleaning mode flag Fcl is set, and step S172 is performed.
Then, the small flow rim cleaning is started. Here, the small-flow rim cleaning is rim cleaning in which the opening of the on-off valve 64 is opened at a smaller opening than in the front rim cleaning and the rear rim cleaning to suppress the flow rate flowing into the rim. Next, step S1
Proceed to 73 and the lamp starts blinking, following step S1
At 74, a cleaning timer TCL is set. The cleaning timer TCL is a timer that presets the time required for cleaning the toilet and the like and stops the operation of cleaning the toilet for that time.

Next, in step S176, it is determined whether or not the cleaning mode is set. This step S176
Since the cleaning mode flag has been set in step S171, the process proceeds to step S177.
In step S177, it is determined whether or not the cleaning switch has been turned off. The determination of the OFF operation of the cleaning switch is made, for example, on condition that the operation switch is pressed. If it is determined in step S177 that the cleaning switch has been turned off, the flow shifts to step S182 to stop the blinking of the lamp, and then in step 183, ends the small-flow rim cleaning. Next, the process proceeds to step S184, where large cleaning is performed. The large washing is a rinsing for discharging the detergent, dirt, and the like remaining in the bowl. Thereafter, in step S186, the cleaning mode flag Fcl is reset, and the cleaning mode ends.

If it is determined in step S177 that the cleaning switch has not been turned off, the process proceeds to step S17.
Move to 8. In step S178, the cleaning timer TC
L is subtracted, and it is determined in subsequent step S180 whether or not the cleaning mode has ended. The end of the cleaning mode is determined based on whether the set time of the cleaning timer TCL has elapsed. If it is determined in step S180 that the cleaning mode has not been completed, the process returns to the initial process without performing the human body detection process from step S101 to step S118. Then, in the repetitive processing, if it is determined in step S180 that the cleaning mode has ended while subtracting in step S178 through steps S150 and S176, the process proceeds to step S182 to stop the blinking of the lamp. In step 183, the rim cleaning is ended.
Next, the process proceeds to step S184, where large cleaning is performed.
Thereafter, in step S186, the cleaning mode flag Fcl
Is reset and the cleaning mode is ended.

When such a cleaning mode is set, low-flow rim cleaning is continued irrespective of the detection signal of the human body detection sensor 100, so that cleaning is facilitated and cleaning water is relatively saved. It becomes possible.

Further, at step S146 in FIG. 14, even when the human body detection sensor 100 has not detected a human body, the cleaning operation is started by a command to start operation by the operation switch 91. Even if the person does not recognize that the washing is performed automatically and recognizes that the washing operation is not performed, the operation of the person is prioritized, so that a feeling of strangeness does not occur.

The present invention is not limited to the above embodiment, but can be implemented in various modes without departing from the gist of the invention. For example, it is not limited to a flush toilet directly connected to a water supply, but may be a toilet flushing device used for a tank-type flush toilet or a urinal, and as a human body detection sensor, a transmission type, an ultrasonic type, a pyroelectric type Further, as the notification means, a modification such as a display means for displaying characters or figures by liquid crystal or a sound means is also possible.

Further, one or both of the remote controllers 92 may have a built-in contact switch operated by touching by a user. In this case, the ON operation and the OFF operation of the cleaning switch may be performed based on the pressing of the contact switch of the remote controller in addition to the operation of the operation switch 91.

FIG. 18 is a block diagram for explaining another embodiment of the water supply system of the flush toilet. In this embodiment, the small-flow rim cleaning is performed by narrowing the opening of the on-off valve 64, but is not limited to this. The constant-flow valve 63 bypasses the constant flow valve 63 as shown in FIG. A bypass flow path 65 provided with a constant flow valve 66 that keeps a small flow rate constant;
A switching valve 71 for switching the flow path to the bypass flow path 65 or the constant flow valve 63 may be provided on the primary side. According to this configuration, by switching the flow path to the bypass flow path 65 by the switching valve 71, rim cleaning with a small flow rate can be performed. Also, in the case of low flow rate rim cleaning, the constant flow rate valve 6
6, the flow rate is stable without being influenced by the pressure of the water supply source.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a flush toilet 10 according to the present embodiment.

FIG. 2 is a vertical sectional view of the flush toilet 10;

FIG. 3 is a sectional view showing a toilet body 20 and the like.

FIG. 4 is a plan view of the toilet body 20 with a cover removed.

FIG. 5 is a block diagram illustrating a water supply system of the flush toilet.

FIG. 6 is a block diagram showing an electronic control circuit 80 for driving and controlling the valve unit 60.

FIG. 7 is an explanatory diagram illustrating a set value set by a dip switch DSW in FIG. 6;

FIG. 8 is a timing chart illustrating a cleaning step.

FIG. 9 is a cross-sectional view of the human body detection sensor 100 cut in a vertical direction.

FIG. 10 is a cross-sectional view showing a state before assembly of the human body detection sensor 100.

FIG. 11 is an explanatory diagram showing a state where the human body detection sensor 100 is attached, as viewed from the inside of the toilet body.

FIG. 12 is an explanatory diagram illustrating a detection area by the human body detection sensor 100.

FIG. 13 is a timing chart showing detection signals from the human body detection sensor 100.

FIG. 14 is a flowchart illustrating a cleaning operation process.

FIG. 15 is a flowchart illustrating a human body detection process.

FIG. 16 is a flowchart illustrating a cleaning process.

FIG. 17 is a flowchart illustrating another example of the cleaning process.

FIG. 18 is a block diagram illustrating another embodiment of the water supply system of the flush toilet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Rinse toilet 12 ... Toilet seat 14 ... Toilet lid 20 ... Toilet bowl main body 22 ... Bowl part 22a ... Water-covered surface 22b ... Exposed surface 23 ... Concave 25 ... Jet nozzle 27 ... Jet connection pipe 28 ... Rim water passage 28a ... Rim water discharge Hole 29: Connection pipe for rim 30 ... Trap drain pipe 31 ... Inlet 32 ... Uphill path 33 ... Downhill path 40 ... Storage chamber 41 ... Cover 50 ... Drainage socket 60 ... Valve unit 61a ... Inlet 61b, 61c ... Outlet 61 ... Branch connection pipe 62 Water stopcock 63, 66 Constant flow valve 64 On-off valve 65 Bypass flow path 70, 71 Switching valve 70a Rim port 70b Jet port 78A, 78B Vacuum breaker 80 Electronic control Circuit 80a Central control unit 82 Valve unit drive unit 83 DC converter 90 Operation unit 90a Holder 91 Operation switch 92 remote controller 93 terminal block 100 human body sensor 100b toilet sensor sensor fixing hole 111 detecting part 111a casing 111b light emitting element 111c light receiving element 111d harness 112 mounting body 114 packing 114a recess 115 Glass plate 116: decorative plate 116a: opening 117: self-tapping screw 118a, 118b: waterproof packing 119: fixing plate 119a: mounting hole 119b: elastic locking piece 120: fixing plate 120a: opening 120b: leg 121: screw RW: pool water Po: drain pipe Pw: water pipe Pn: nipple DSW: dip switch Cd: relay harness ECU: electronic control unit Tp1, Tp2: magic tape for fixing Cn1, Cn2: connector Dr: door

Claims (10)

[Claims] 1. A human body detection sensor that outputs a detection signal when a user approaches a toilet, and an operation that outputs a cleaning instruction signal for instructing a cleaning water supply amount to the toilet by a predetermined operation. Means, washing control means for outputting a control signal for instructing a supply amount and / or timing of washing water to the toilet based on the detection signal and the washing instruction signal, and the toilet based on the control signal Washing water supply means for supplying washing water to the washing water supply means when the amount of washing water supplied to the toilet is changed based on the washing instruction signal. A toilet flushing device for instructing water supply. 2. The washing control means according to claim 1, wherein after the washing water supply amount to said toilet is changed based on said washing instruction signal,
The toilet flushing apparatus according to claim 1, wherein the flushing water supply amount automatically returns to the pre-change flush water supply amount after a predetermined time has elapsed. 3. The cleaning control unit according to claim 2, wherein the cleaning control unit instructs the cleaning water supply unit to supply a predetermined cleaning water when the cleaning water supply amount automatically returns. Toilet washing device. 4. The toilet flushing apparatus according to claim 1, wherein an amount of flush water supplied to the toilet based on the flush instruction signal is changed from a predetermined amount to zero. 5. The toilet flushing apparatus according to claim 1, wherein a supply amount of flush water to the toilet based on the flush instruction signal is changed from a predetermined amount to a smaller amount than the predetermined amount. apparatus. 6. A notifying means for notifying a user that the amount of washing water supplied to the toilet is changed when the amount of washing water supplied to the toilet is changed based on the washing instruction signal. 6. An electronic device according to claim 1, wherein:
A toilet flushing device according to item 1. 7. The toilet flushing apparatus according to claim 6, wherein the notifying means is a light emitting means. 8. The operating means comprises a plurality of contact-type operating means operated by touching by a user and a plurality of non-contact-type operating means operable without touching by a user. The toilet bowl cleaning apparatus according to any one of claims 1 to 7. 9. The method of changing the amount of washing supplied to the toilet bowl can be selected from the contact type operation means, the non-contact type operation means, or both the contact type operation means and the non-contact type operation means. The toilet bowl washing apparatus according to claim 8, characterized in that: 10. The toilet flushing apparatus according to claim 8, wherein the change in the amount of washing supplied to the toilet is performed only by the contact-type operation means.