JPS6389740A - Water saving apparatus of flash toilet - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Purpose of invention (Industrial application field) This invention relates to a water saving device for flush toilets.

(Prior art) Conventionally, in flush toilets especially for women, a large amount of flushing water has been flushed regardless of the size of use.When entering the room, the first thing to do is to spray water (etiquette flushing), and then During use, water is sprayed to muffle the noise (sound-muffling cleaning).
After use, water is sprayed for main cleaning. As a result, there were many cases in which washing water was wasted due to unnecessary washing water being flushed away.

Therefore, in order to solve this problem, a sensor detects when a user enters the room, and measures the elapsed time from the time the user enters the room to the time the user operates the water discharge switch.
A water-saving device for flush toilets has been proposed in which flush water for small errands is flushed when the elapsed time is within a preset time, and city flush water for errands is flushed when the elapsed time is longer than a preset time. ing.

(Problems to be Solved by the Invention) However, in the water-saving device for flush toilets proposed above, it is not possible to detect the time when the user has finished using the flush toilet, so it is difficult to use etiquette cleaning or silent cleaning. Even if the user operates the water discharge switch for this purpose, if the user stays in the flush toilet for a long time, there is a problem that a large amount of flush water will be flushed out.

An object of the present invention is to provide a water saving device for a flush toilet that can accurately detect when the most frequently used flushing water is required and efficiently flush the required amount of flushing water.

Structure of the Invention (Means for Solving Problems) The present invention provides a water spraying means for discharging flushing water into the toilet bowl, and an operating means for activating the water discharging means to start discharging the flushing water into the toilet bowl. an entry detection means for detecting the entry of a user; a detection device for detecting the use of toilet paper by the user; and a timer means for starting measuring time after the room entry detection means detects entry. A storage means for storing the measured time at the time when the detection device detects the use of toilet paper; and a storage means for storing the measured time at the time when the detection device detects the use of toilet paper, and a storage means for storing the measured time (
t), and when the time (t) has not reached a predetermined time (T), a small amount of washing water is discharged, and after reaching the predetermined time (T), a large amount of washing water is discharged. and a water discharge control means for controlling the water discharge means so as to discharge water.

(Operation) When a user enters the room, the room entry detection means detects the user's entry. The timer means starts measuring time based on this room entry detection. Then, when the user uses toilet paper, the detection device detects the use of toilet paper, and based on the detection, the storage means stores the measured time from the detection of entering the room to the detection of paper use. Then, when the user operates the operation means, the water discharge opening control means performs large or small cleaning based on the comparison result between the time t stored in the storage means and a predetermined time T. Water is selectively released.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 3.

In Figure 2, 1 is a Japanese-style flush toilet, and 2 is the Japanese-style flush toilet 1.
A water discharge pipe for discharging washing water to the water discharge pipe 2.
A solenoid valve 3 that starts and stops discharging wash water to the solenoid valve 3, and a water pressure regulating valve 5 that controls the water pressure supplied from the water supply pipe 4 to the solenoid valve 3 are provided. And the water discharge pipe 2. Solenoid valve 3, water supply pipe 4. The water pressure regulating valve 5 constitutes a water discharging means 6.

7 is a control box incorporating the water spraying means 6,
Various control devices are built in to control the water spraying operation for the water spraying means 6, and a water spraying switch 8 as an operating means is provided on the side wall thereof.

Reference numeral 9 denotes an entry sensor as a room entry detection means, which is composed of a limit switch, which is turned on when the user locks the door (not shown) of the flush toilet, and is turned off when the user removes the lock, thereby detecting entry/exit. The signal to the control box 7
The output is output to a control device as a water discharge control means provided inside.

Therefore, this room entry sensor 9 not only detects the user's entry into the room, but also functions as a room exit sensor that detects the user's exit from the room.

In addition, this sky sensor 9 may use a door switch that is turned on when the door is closed and turned off when the door is opened, or
An infrared sensor may be used that is turned on while the user is above the Japanese-style flush toilet 1 and turned off when the user leaves.

Reference numeral 10 denotes a support shaft provided on a paver holder 12 that holds the toilet paper 11. The support shaft 10 supports the toilet paper 11 and is rotated as the toilet paper 11 is used. Reference numeral 13 denotes a detection device provided on the side of the paper holder 12, which detects the rotation of the support shaft 10 to remove toilet paper 1 by the user.
1 is detected, and a paper use signal is output to a control m+ device provided in the control box 7 as a water discharge control means.

Note that this detection device 13 may be an infrared sensor or the like that detects the user's hand near the paper holder 12.

Next, the electrical configuration of this control device will be explained.

In Figure 1, 15 is a central processing unit (hereinafter referred to as CPU)
The water discharge switch 8 constitutes a water discharge amount control means, and the water discharge switch 8. A room entry sensor 9 and a detection device 13 are connected, and a water discharge signal, a room entry/exit detection signal, and a paper use signal are input.

16 is a read-only memory (hereinafter referred to as ROM) that stores a control program for controlling and driving the CPU 5, and 17 is a readable and writable memory (hereinafter referred to as R
AM> is adapted to store the results of calculations, and is provided with a register 18 as a storage means for storing the latest time of the time measured by a timer circuit 19, which will be described later.

A timer circuit 19 is connected to the CPU 15 and measures the time from when the room entry sensor 9 outputs the entry detection signal to when the detection device 13 outputs the paper use signal.

The solenoid valve drive circuit 20 excites and drives the solenoid valve 3 based on a control signal from the CPU 15 to supply a small amount (about 6 liters for small use in this embodiment) of washing water or a large amount (
In this embodiment, approximately 12 liters of cleaning water is selectively sprayed for general use, and then the system is stopped.

Now, the operation of the control device configured as described above will be explained according to the flowchart shown in FIG.

When the power is turned on, the CPU'15 resets various memories such as the register 18 provided in the RAM 17 to rOJ (step 1), and then the user enters the room and the entry sensor 9 outputs an entry detection signal. (Step 2). Then, when the user enters the room and the room entry detection signal is output from the room entry sensor 9, the CPU 15 determines YES and causes the timer circuit 19 to start measuring time in step 3.

Furthermore, in step 4, the CPIJ 15 determines whether or not the paper use signal is output from the detection device 13 after the user has finished using the paper, and in step 5, the water discharge switch 8
It is determined whether or not has been operated, and whether or not the room entry sensor 9 is outputting a room exit detection signal in step 6. If the user leaves the room, the process returns to step 1; if the user does not leave the room, the process returns to step 4.

When it is determined in step 4 that the user has finished using the toilet paper 11 and a paper use signal is output from the detection device 13, the timer at that time is stored in the register 18 provided in the RAM 17 in step 7. The latest measurement time measured by the circuit 19 is stored, and the process returns to step 4.

Then, when the user operates the water discharge switch 8, the CPU
15, the judgment in step 4 is NO, and the judgment in step 5 is Y.
ES, and the time t stored in the register 18 in step 8 and a predetermined time T (approximately 2 in this embodiment)
minutes), and if it is determined that the stored time t has not reached the predetermined time T, the solenoid valve drive circuit 20 is controlled in step 9 to excite the solenoid valve 3 to reduce the amount of cleaning water. After discharging water, the process returns to step 4 until the user leaves the room.

If the CPIJ 15 determines in step 8 that the stored time t has exceeded the predetermined time, in step 10 the solenoid valve drive circuit 20 is controlled to excite and drive the solenoid valve 3, and a large amount of After discharging the washing water, the process returns to step 4.

In addition, if this user operates the water discharge switch 8 without using the toilet paper 11 for etiquette cleaning or silent cleaning before finishing using the toilet, rOJ is stored in the register 18 as time t. Therefore, CPtJ15 is the time t stored in step 8.
It is determined that the time has not reached the predetermined time T, and a small amount of cleaning water is discharged.

Therefore, even if it takes a long time to finish using the room after entering the room, as long as the toilet paper 11 is not used, a large amount of water may be discharged depending on the user's operation of the water discharge switch 8 during etiquette washing or sound-muffling washing. Water is never sprayed.

The CPU 15 also operates a timer circuit 19 from the time the user enters the room until the user uses the toilet paper 11.
The measured time, that is, the time t when the user finished using the water, is stored in the register 18, and the amount of water to be sprayed based on the operation of the water spray switch 8 is determined depending on the length of that time t and the predetermined time T. . Therefore, for example, even if the detection device 13 is activated for some reason immediately after entering the room, it is necessary to spray water in a frequently used color in order to store the time when the detection device 13 was newly activated after use in the register 18. It is possible to accurately detect the situation and flush the cleaning water efficiently.

Note that the present invention is not limited to the above-mentioned embodiments, and may change the predetermined time T or change the amount of water discharged as appropriate based on the time t stored in the storage means for the first time or a predetermined number of times. The present invention may be modified as desired without departing from the spirit of the invention, such as implementing it in a Western-style flush toilet or implementing it in a Western-style flush toilet.

Effects of the Invention As detailed above, in the present invention, the water discharge amount control means controls the necessary amount of water discharged in the actual flush toilet from the time the user enters the room until the user finishes using the toilet and uses the toilet paper. Since it is possible to make correct judgments based on the results, it has an excellent effect in industrial use, such as making it possible to flush washing water without wasting it.

[Brief explanation of the drawing]

1 to 3 show an embodiment embodying the present invention, in which FIG. 1 is an electrical block circuit diagram, FIG. 2 is a schematic diagram of a water spray device, and FIG. 3 is a flow chart diagram. DESCRIPTION OF SYMBOLS 1... Flush toilet bowl, 6... Water discharge means, 8... Water discharge switch as operation means, 9... Entry sensor as room entry detection means, 11... Toilet paper, 13.
...Detection device, 15...Central processing unit (CPU) as water discharge amount control means, 16...ROM, 17...R
A.M. 18...Register, 19...Timer circuit as timer means, 20...Solenoid valve drive circuit, time t11 constant time T0

Claims (1)

[Scope of Claims] 1. Water discharging means for discharging flushing water into the toilet bowl, operating means for activating the water discharging means to start discharging flushing water into the toilet bowl, and detecting the entry of a user into the toilet. a detection device that detects the use of toilet paper by a user; a timer device that starts measuring time after the room entry detection device detects entry; and a detection device that detects the use of toilet paper by the user. a storage means for storing the measured time at the time of detection; and a storage means for reading the stored time (t) from the storage means based on the operation of the operation means by the user, and storing the time (t).
When the predetermined time (T) has not yet been reached, the water discharging means is controlled so that small wash water is sprayed, and after the predetermined time (T) has been reached, large wash water is sprayed. A water-saving device for a flush toilet comprising a water discharge amount control means. 2. The water saving device for a flush toilet according to claim 1, wherein the storage means sequentially stores only the latest measurement time of the timer means.