JPH07116738B2 - Water-saving device for flush toilet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a water-saving device for a flush toilet.

(Prior Art) Conventionally, for example, in a flush valve type and a tank type cleaning device provided in a flush toilet, whether a certain amount of water is flown regardless of the size of the stool, or there is a difference between the size The distinction was to be selected by human operation.

(Problems to be solved by the invention) Especially, in a women's flush toilet, a large amount of flush water is flown regardless of the size of its use. Etiquette cleaning), then the second time water is discharged (sound-erasing or odor-eliminating water) while using, and then water for cleaning (hereinafter referred to as main cleaning),
As for the type of large and small use, large use accounted for less than 10% of the use, and most of them were small use. In this way, it can be said that a large amount of water is wasted in terms of the frequency of flushing water. There was a problem that the amount of water used for heavy use increased as the staying time increased.

The object of the present invention was made in view of the above-mentioned conventional circumstances, and the amount of water used for heavy use is reduced to the necessary minimum, whereby a water-saving device for a flush toilet that can totally save the use of water is provided. To provide.

(Means for Solving Problems) A water saving device for a flush toilet according to the present invention includes a water discharge means for discharging cleaning water into the toilet on the basis of a water discharge control signal, an entrance / exit detection means for detecting entrance / exit, and Timer means for measuring an in-room time from the entry detection to the exit detection by the exit detection means, an in-room time t measured by the timer means when the entry / exit detection means detects exit, and a preset time T When the occupancy time comparison determination unit determines that the occupancy time t exceeds the set time T, the occupancy time comparison determination unit compares the occupancy time comparison determination unit and the occupancy time comparison determination unit based on the determination result. A heavy water discharge control means for outputting to the means is provided. Further, when the number-of-people detection means for detecting the number of users who have entered the room and the time-of-occupancy comparison determination means determines that the time-of-occupancy t is within the set time T, based on the detection of the number-of-people detection means. Whether or not the number of people counting means for counting the number n of users, the operating means for discharging water to the toilet, and the number of people n counted by the number of people counting means for each operation of the operating means have reached a preset number of people N The number comparison determination means for determining whether or not, the size determination control means for selectively outputting the water discharge control signal for small use or for large use to the water discharge means based on the determination result of the number comparison determination means, and the size determination control means Is provided with reset means for resetting the number-of-people counting means when a heavy water discharge control signal is output to the water discharge means.

(Operation) When the user enters the toilet, the timer means measures the time in the room from the entry detection of the entry / exit detection means to the exit detection. Then, when the user leaves the room, the in-room time comparison / determination means compares and determines the in-room time t with a preset time T. Then, the time in the room t is the set time T
When the occupancy time comparison determination means determines that
Based on the determination result, the heavy-duty water discharge control means outputs a heavy-duty water discharge control signal to the water-discharging means, and the water-discharging means discharges the heavy-duty washing water based on the signal.

Further, when the occupancy time comparison / determination means determines that the occupancy time t is within the set time T, the people counting means counts the number n of users based on the detection by the people detection means.

Further, when the user operates the operating means while in the room, it is determined whether or not the counted number of people n counted by the number of people counting means reaches a preset number of people N each time the operating means is operated, by comparing the number of people. The means determines. And
Based on the determination result of the number of people comparison and determination means, the size determination control means selectively outputs a small-use or large-use water discharge control signal to the water discharge means. The reset means resets the number-of-people counting means when the large / small discrimination control means outputs a large-use water discharge control signal to the water discharge means.

(Embodiment) An embodiment in which the present invention is embodied in a valve-type flush toilet will be described below with reference to FIGS. 1 to 3.

1 is a Japanese-style flush toilet, 2 is a water discharge pipe for discharging water to the toilet 1, 3 is an electromagnetic valve as a water discharge means provided in the water discharge pipe 2, and constitutes a water discharge device 4 together with the water discharge pipe 2. 5
Is a room entry / exit sensor as a person number detecting means and a room entering / leaving detecting means provided on a lock (not shown) of a toilet door, and includes a limit switch. The entry / exit sensor 5 is adapted to be turned on when a user who has entered the room locks it, and is turned off when the lock is released. Reference numeral 6 denotes an operation switch as an operation means for discharging the water discharge device 4, which is provided on a wall or the like in the toilet.

Next, the electrical configuration of this water saving device will be described.

A central processing controller (hereinafter referred to as CPU) as a reset means, a timer means, an in-room time comparison and determination means, a people comparison and determination means, a large water discharge control means, a people counting means, and a size determination control means, and a timer circuit. (Not shown). Reference numeral 8 is a read-only memory (ROM) that stores a control program for controlling and driving the CPU 7, and reference numeral 9 is a readable and writable memory (RAM) that temporarily stores the operation result. A drive circuit 11 excites the electromagnetic valve 3 based on a control signal from the CPU 7.

Next, the operation of the water-saving device configured as described above will be described with reference to the flowchart shown in FIG.

When a power switch (not shown) is turned on, the CPU 7 resets the count register etc. of the RAM 9 to “0” and
Various registers and various memories are reset (step 1, hereinafter step is represented by S). Next, it is determined whether or not the entry / exit sensor 5 is turned on, that is, whether or not the user enters the room and locks the door (S2).

When the user enters the room and locks the room, the entry / exit sensor 5 is turned on, and the CPU 7 starts measuring the in-room time t based on the reference pulse signal from the timer circuit based on the ON signal (S3). Then, in S4, the CPU 7 determines whether or not the entry / exit sensor 5 detects exit, that is, whether or not the door is unlocked and the entry / exit sensor 5 is turned off.

Then, when the user operates the operation switch 6 while entering the room, the determination of S4 is NO based on the ON signal by the operation,
The determination in S5 is YES, and in S6, the CPU 7 reads the count register A to read the counting number n, and compares it with the counting number n and the preset number N stored in the ROM 8 in advance (7th person is targeted in this embodiment). To do. Since the counted number n is smaller than the set number N at first, the determination in S6 is NO, and the CPU 7 outputs a small water discharge control signal to the drive circuit 11 in S7 based on the determination result. Then, the electromagnetic valve 3 is drive-controlled by the drive circuit 11 and excited for a predetermined time t2 (that is, 3 seconds <t1 in this embodiment), discharges the cleaning water for small use, and returns to S4.

Therefore, when the number of users is less than the set number N, the small amount of water is discharged by operating the operation switch 6.

Then, when the user leaves the room, that is, when the entry / exit sensor 5 is turned off in S4, the CPU 7 determines YES, and the presence time t from the entry detection of the entry / exit sensor 5 to the exit detection t
And the set time T stored in the ROM 8 in advance (S1
0). This set time T (2 minutes and 30 seconds in this embodiment) is set as a sufficient time for adding a large amount of time.

Then, when the CPU 7 determines that the in-room time t ≧ the set time T, the CPU 7 outputs a large water discharge control signal to the drive circuit 11 in S11. Then, the electromagnetic valve 3 is driven by the drive circuit 11
Is driven and excited for a predetermined time t1 (> t2), discharges cleaning water for heavy use, returns to S1, and the CPU 7 resets the count register to "0".

On the other hand, in S10, if the time in room t <the set time T, the CPU
When 7 determines, "1" is added to the count register A in S12, and the process proceeds to S2.

Then, when the Nth person (7th person in this embodiment) from the person who first used this toilet enters the room, if the user operates the operation switch 6 while entering the room through S2, S3, S4, S5
The determination is YES, the determination in S6 is also YES, and the process proceeds to S8. In S8, the CPU 7 drives the main water discharge control signal to drive circuit 11
Output to. Then, the electromagnetic valve 3 is driven and controlled by the drive circuit 11 and excited for a predetermined time t1 (> t2), and after discharging the cleaning water for large use, the CPU 7 resets the count register to "0" in S9, and returns to S4. . After that, even if the third repeat operation switch 6 is operated again, the count register is reset to "0", so the determination in S6 is NO.
Therefore, only water for small use will be released in S7.

That is, when the person who has left the room for less than the set time T continues and the N-th person operates the operation switch 6 for the first time, heavy water discharge is performed based on the operation, and thereafter. When the operation switch 6 is operated, only a small amount of water is discharged.

It should be noted that steps subsequent to the exit determination NO at S4 may be provided as separate circuits, and if NO is determined at S4, the process may return to S4. In this case, by using the operation switch 6 as a separate circuit, a small amount of water is discharged by the operation of the operation switch 6 by the user regardless of the detection operation of the entry / exit sensor 5. Therefore, this allows water to be released during cleaning work.

Note that the present invention is not limited to the above-described embodiment, and the number of people detecting means and the room entering / leaving detecting means are separately configured, or as those means, an infrared sensor, a proximity sensor for detecting the entrance / exit of a person, Use a door switch that detects the opening and closing of the toilet door, an ultrasonic sensor, a temperature sensor that detects the body temperature of the person, or change the set time T appropriately.
It is also possible to make arbitrary changes without departing from the spirit of the present invention.

Effects of the Invention As described in detail above, according to the present invention, the following effects are achieved.

(A) While the number of users is less than the set number of people, water is discharged only for small use and not for large use even if the operation means is operated, so water can be saved.

(B) Then, even if the user leaves the room for less than the set time, there is no concern that the waste will be clogged because the large amount of water is discharged by the operation of the first operation means of the number of set people.

(C) In addition, it is possible to prevent the user from discharging the water only for heavy use, and to flush the water for heavy use automatically even if the user leaves the room for a set time after entering the room, without operating the operating means. it can. As a result, total water saving can be performed, and water discharge for heavy use can be minimized.

[Brief description of drawings]

FIG. 1 is an electric block circuit diagram of an embodiment embodying the present invention, FIG. 2 is a schematic diagram of a water discharger, and FIG. 3 is a flow chart diagram. DESCRIPTION OF SYMBOLS 1 ... Toilet bowl, 2 ... Water discharge pipe, 3 ... Electromagnetic valve as water discharge means, 5 ... Entry / exit sensor, 6 ... Operation switch as operation means, 7 ... Reset means, timer means, operation frequency comparison / determination means, stay time Comparison determination means, number of people comparison determination means,
Central processing control units (CPU), 8 ... ROM, 9 ... RAM, 11 ... Drive circuit as first and second large-scale water discharge control means, person counting means, operation number counting means, and size discrimination controlling means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-144434 (JP, A) JP-A-60-70237 (JP, A) JP-A-55-23270 (JP, A)

Claims (1)

[Claims] 1. A water discharge means (3) for discharging cleaning water into a toilet bowl based on a water discharge control signal, an entrance / exit detection means (5) for detecting entrance / exit, and an entrance / exit by the entrance / exit detection means (5). A timer means (7) for measuring an in-room time from the detection to the exit detection, and an in-room time t measured by the timer means (7) when the entering / leaving detection means (5) detects an exit, and preset. When the occupancy time comparison / determination means (7) compares the set occupancy time T and the occupancy time comparison / determination means (7) determines that the occupancy time t exceeds the set time T, the determination result is A heavy water discharge control means (7) for outputting a heavy water discharge control signal to the water discharge means based on this, and a number detection means (5) for detecting the number of users entering the room
When the occupancy time comparison determination means (7) determines that the occupancy time t is within the set time T, the number n of users is counted based on the detection by the occupancy detection means (5). Number of people counting means (7), operating means (6) for discharging water to the toilet, set number of people N by which the number of people counting by the number of people counting means (7) is preset for each operation of the operating means (6) Based on the determination result of the number comparison determination means (7) and the number comparison determination means (7), the small or large water discharge control signal is selectively output to the water discharge means. A discrimination control means (7); and a reset means (7) for resetting the number-of-people counting means (7) when the large / small discrimination control means (7) outputs a large-use water discharge control signal to the water discharge means. Section of the flush toilet characterized by Apparatus.