JP3213205B2 - Flush toilet water supply system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply system for flush toilets.

[0002]

2. Description of the Related Art Conventionally, in a flush toilet provided with a water supply device, an entry / exit detection sensor for detecting that a user has entered / exited a door lock of a toilet provided with a toilet, for example, is provided. In addition, a washing switch is provided on a side wall in the toilet room to allow a small amount of washing water (about 6 liters) to flow by a user's manual operation. When the user leaves the room for a predetermined time after entering the room, a large amount of washing water having a larger amount of water than a small amount of washing water automatically flows as re-washing water.

[0003]

However, in the above-described conventional water supply device, when a user has entered a room and a predetermined time has passed, after the cleaning switch is operated and the user leaves the room, the switch operation is performed. Since a large amount of re-wash water is automatically supplied unconditionally after the small amount of wash water accompanying the above, there is a problem that the wash water is wasted.

Accordingly, the present invention can prevent the waste of the washing water because the flow rate of the washing water supplied when the user leaves the room after the last operation of the washing switch can be controlled in accordance with the use conditions of the user. The purpose was to save water.

[0005]

According to the present invention, there is provided a water discharge means for discharging flush water into a toilet based on a water discharge control signal, and a small amount of water discharge to the water discharge means based on manual operation of an operation switch by a user. First water discharge control means for outputting a water discharge control signal, entry / exit detection means for detecting entry / exit of a user, and first measurement for measuring a first occupancy time from entry detection by the entry / exit detection means Means and a second water discharge control for outputting a large amount of water discharge control signal to the water discharge means when the user leaves the room after the first set time has passed a first set time set in advance. Means for resetting each time the operation switch is operated during the occupancy of the room after the first occupancy time elapses a preset first set time.
A second measuring means for measuring a second occupancy time from the last operation switch operation to the user's exit from the room, and a second set time and the second occupancy time set in advance. In comparison, when the second occupancy time is less than the second set time,
The gist of the invention is that it comprises a water amount adjusting means for changing a large amount of water discharge control signal output from the second water discharge control means to a small amount of water discharge control signal.

[0006]

According to the present invention, during the occupancy after the first occupancy time elapses a first set time which has been set in advance,
When the user operates the last operation switch, the operation switch
H is reset, and the second occupancy time is measured by the second measuring means. Then, the water amount adjusting means compares the second set time set in advance with the second occupancy time, and when the second occupancy time does not exceed the second set time, the water amount adjustment means sets the second set time. The water discharge control signal for large water discharge output from the water discharge control means is changed to the water discharge control signal for small water discharge. Therefore, a small amount of flush water is discharged into the toilet based on the small-volume water discharge control signal, and a large amount of flush water is not discharged.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a water supply system for a flush toilet according to an embodiment of the present invention.

As shown in FIG. 1, a water supply pipe 2 for supplying flush water to the toilet 1 is connected to the toilet 1. An electromagnetic valve 3 as a water discharging means is provided in the middle of the water supply pipe 2. The electromagnetic valve 3 is ON / OFF (open / closed) controlled by a central processing control device (hereinafter, referred to as CPU) 4 described later, and flush water is supplied to the toilet 1 through the water supply pipe 2 by the opening operation of the electromagnetic valve 3. You. On the other hand, an entrance / exit detection sensor 5 is provided on a side wall or a front wall of the lavatory, which faces a user of a toilet (not shown). A CPU as a first water discharge control means, a second water discharge control means, and a water amount adjustment means is provided to the entrance / exit detection sensor 5 via a sensor circuit unit 7.
4 are connected. A battery 6 is connected to the CPU 4, and the CPU 4 is driven by power supplied from the battery 6. Although not shown, the CPU 4 is connected to a timer circuit, a read-only memory (ROM) storing a control program for controlling and driving the CPU 4, and a readable and writable memory (RAM).

Next, a detailed description of the control system of the water supply device will be described with reference to FIG. As shown in FIG. 2, the entrance / exit detection sensor 5 composed of an infrared sensor is composed of a light emitting element 8 composed of a light emitting diode and a light receiving element 9 composed of a phototransistor. A light emitting circuit 10 and a light receiving circuit 11 are connected to each of the elements 8 and 9. The light emitting element 8 emits light (infrared light) in response to a command signal from the light emitting circuit 10, and the light receiving element 9 receives reflected light from a user using the toilet 1. The light receiving circuit 11 outputs a light receiving signal to the reflected light presence / absence determining circuit 12 in accordance with the light receiving operation of the light receiving element 9. The reflected light presence / absence determination circuit 12 determines the level of the signal from the light receiving circuit 11 and outputs a signal to the CPU 4 only when the signal is equal to or higher than a predetermined level.

The CPU 4 is connected with a touch-type cleaning switch 15 as an operation switch and a solenoid valve drive circuit 14. Then, the CPU 4 controls the opening and closing of the electromagnetic valve 3 so that a small amount of washing water (6 liters) flows into the toilet 1 in response to the response of the washing switch 15. Further, the CPU 4 has first and second timers T1 and T1 as first and second measuring means.
2 is built-in.

As shown in FIG. 3, a first timer T1 measures a first occupancy time t1 based on an entry signal from the entry / exit detection sensor 5. Second timer T2
Is a cleaning switch based on an operation signal from the cleaning switch 5 and a room exit signal from the entry / exit detection sensor 5 after a preset first set time T (120 seconds) has elapsed since the user entered the room. The time between when the user 15 is operated and when the user leaves the room is measured as a second occupancy time t2. The second timer T2 is connected to the cleaning switch 15
Is reset each time is operated, and the second occupancy time t2 is measured based on the last operation of the washing switch 15 during the occupancy until the user leaves the room.

Then, the CPU 4 compares the first occupancy time t1 with the first set time T, and determines whether or not the first occupancy time t1 has exceeded the first set time T. Then, the CPU 4 determines that the first occupancy time t1 is equal to the first set time T.
When it is confirmed that the cleaning water has been used beyond the limit, a large amount of cleaning water (12 liters) is automatically discharged when the user leaves the room, and a re-cleaning standby state is set. Further, the CPU 4 determines the second occupancy time t.
2 is compared with a preset second set time T0 (10 seconds), and it is determined whether the second occupancy time t2 has exceeded the second set time T0.

When the second occupancy time t2 does not exceed the second set time T0, the CPU 4 reduces the amount of water in the re-washing standby state to a small amount of washing water (6 liters) based on the determination result. The solenoid valve 3 is opened and closed so as to be changed and to flow into the toilet 1 as rewash water. On the other hand, the CPU 4
If the in-room time t2 exceeds the second set time T0, the amount of water in the re-washing standby state, that is, a large amount of washing water (12 liters) is supplied to the toilet 1 based on the determination result. The solenoid valve 3 is opened and closed. Furthermore, CPU
When it is determined that the first occupancy time t1 does not exceed the first set time T, the re-cleaning is not performed.

Next, the operation of this embodiment will be described with reference to a time chart shown in FIG. 3 and a flowchart shown in FIG. Step (hereinafter, step is simply referred to as S)
At 100, the entry / exit detection sensor 5 detects that the user has entered the room. Then, in S101, the CPU 4 starts the first timer T1 based on the entry signal.
The measurement of the in-room time t1 is started, and the process proceeds to S102.
In S102, when the user operates the washing switch 15 within the first set time T, the CPU 4 opens the electromagnetic valve 3 and a small amount of washing water flows into the toilet 1.

In S103, the CPU 4 compares the first occupancy time t1 with the first set time T, and when it is determined that the first occupancy time t1 is less than the first set time T, , S104. In S104, even if the entry / exit detection sensor 5 detects the exit of the user, the solenoid valve 3
Is not opened, and the solenoid valve 3 is kept closed by the CPU 4. Therefore, the rewash water does not flow to the toilet 1.
Then, in S105, the CPU 4 resets the data such as the occupancy time of the user, and returns to S100.

In S103, the first timer T1
If the first occupancy time t1 measured by (1) is equal to or longer than the first set time T, the flow shifts to S106. In S106, when the user operates the cleaning switch 15, the CP
At U4, the solenoid valve 3 is opened, and a small amount of flush water flows into the toilet 1. Further, the operation signal of the cleaning switch 15 is
Is input to Then, in S107, based on the input of the operation signal, the CPU 4 starts measuring the second occupancy time t2 by the second timer T2.

Thereafter, in S108, the entry / exit detection sensor 5 detects the exit of the user. Then, in S109, the CPU 4 determines the second occupancy time t2, compares the determined second occupancy time t2 with the second set time T0, and sets the second occupancy time t2 to the second occupancy time t2. Is determined to be equal to or longer than the set time T0, that is, the time from when the cleaning switch 15 is operated after the first set time T elapses until the user leaves the room is equal to or longer than the second set time T0. If there is, the process proceeds to S110. Then, in S110, when the CPU 4 opens the solenoid valve 3, a large amount of flush water flows through the toilet 1 as re-wash water. Then, S1
05, and returns to S100 again.

In S109, the second occupancy time t
If it is determined that 2 is less than the second set time T0, the process proceeds to S11.
Move to 1. Then, in S111, when the CPU 4 opens the electromagnetic valve 3, the same amount of flush water (6 liters) as the small amount of flush water flows into the toilet bowl 1 as re-wash water. Thereafter, the process proceeds to S105, and returns to S100 again.

As described above, in the water supply device in the flush toilet of the present embodiment, the flush switch 15 is operated after the first set time T is exceeded, and the second occupancy time t2 in that case is set to the second time T2. When the set time T0 has not been exceeded, the CPU 4 controls the opening and closing of the solenoid valve 3 so that a small amount of rewash water flows into the toilet 1. Therefore, unlike the related art, since a large amount of re-wash water is not allowed to flow after a small amount of wash water associated with the operation of the wash switch 15, water can be saved.

If the cleaning switch 15 is operated after the first set time T has been exceeded and the second occupancy time t2 in that case exceeds the second set time T0, C is set.
The PU 4 controls the opening and closing of the solenoid valve 3 so that a large amount of rewash water flows into the toilet 1. Therefore, when a large amount of washing water is required, a large amount of re-washing water can be supplied to the toilet 1 according to a predetermined condition, so that a decrease in washing capacity can be prevented.

Further, the CPU 4 sets a first occupancy time t1.
Is determined not to exceed the first set time T, the CPU 4 closes the solenoid valve 3 after leaving the room. Therefore, the rewash water does not flow to the toilet 1 wastefully. As a result, water can be further saved.

The present invention can be configured as follows in addition to the above embodiment. (1) In the above embodiment, the embodiment is embodied in the toilet 1, but it is also possible to embody the embodiment in a urinal. Even with this configuration, the same effects as those of the above embodiment can be obtained.

(2) In the above embodiment, a small amount of washing water based on the operation of the washing switch 15 and a small amount of washing water in the case of re-washing are set to the same amount. It is possible to change to any water volume.

(3) In the above embodiment, the first set time T was set to 120 seconds and the second set time T0 was set to 10 seconds. However, the set time may be changed to any set time other than these set times. It is also possible.

Next, technical ideas other than the claims which can be grasped from the embodiment will be described together with their effects. (A) The water supply device for a flush toilet according to claim 1, wherein the operation switch is a touch-type switch. With this configuration,
The operation for flowing the washing water can be easily performed.

(B) The water supply device for a flush toilet according to claim 1, wherein the water discharging means 3 is an electromagnetic valve. With this configuration,
Unlike a valve or the like whose opening can be adjusted, it is possible to prevent the water pressure of the flush water for the flush toilet 1 from decreasing.

[0027]

According to the present invention, the flow rate of the washing water supplied when the user leaves the room after the last washing switch is operated can be controlled in accordance with the conditions of use by the user. Water can be saved by preventing waste.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a water supply device in a toilet bowl showing one embodiment of the present invention.

FIG. 2 is a block diagram showing a control system of the water supply device.

FIG. 3 is a time chart of a control system of the water supply device.

FIG. 4 is a flowchart for explaining the operation.

[Explanation of symbols]

3 ... solenoid valve (water discharge means), 4 ... CPU (first water discharge control means, second water discharge control means, water amount adjustment means), 5 ... entry / exit detection sensor (entrance / exit detection means), 15 ... washing switch ( Operation switch), T1... First timer (first measuring means), T2... Second timer (second measuring means), t1.
First occupancy time, t2: second occupancy time, T: first set time, T0: second set time,

Continuation of the front page (56) References JP-A-2-70839 (JP, A) JP-A-63-277329 (JP, A) JP-A-63-52525 (JP, A) JP-A-63-67340 (JP, A) , A) Hikaru 2-93374 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) E03D 5/10

Claims (1)

(57) [Claims] 1. A water discharging means for discharging flush water into a toilet based on a water discharging control signal, and a first water discharging control signal for discharging a small amount of water to the water discharging means based on a manual operation of an operation switch by a user. A water discharge control means, an entry / exit detection means for detecting entry / exit of a user, a first measurement means for measuring a first occupancy time from entry detection by the entry / exit detection means, A second water discharge control means for outputting a large amount of water discharge control signal to the water discharge means when the user leaves the room after a first set time which has been set in advance; The operation switch is operated while the room is in the room after the first set time set in advance.
A second measuring means for measuring a second occupancy time from the last operation of the operation switch until the user leaves the room, a second set time set in advance and the second occupancy time, When the second occupancy time is less than the second set time, the large water discharge control signal output from the second water discharge control means is changed to the small water discharge control signal. A flush toilet water supply device comprising a water amount adjusting means to be changed.