JP2861099B2 - Cleaning water supply device - Google Patents

Description

The present invention relates to a flush water supply device for supplying flush water to a flush toilet.

(Prior art) As a device for supplying a predetermined amount of washing water to a toilet irrespective of water supply pressure, a valve mechanism is closed when the flow rate of washing water measured by a water meter reaches a predetermined value. Things are Japanese
It is disclosed in JP-A-63-114734.

(Problems to be Solved by the Invention) Since the water meter is provided with a gear mechanism for integrating the flow rate in addition to the impeller, the water meter itself is large and requires a large installation space. Also, since the gear mechanism is driven, the pressure loss is large, and especially when the water supply pressure is low, the toilet may not be reliably washed due to the influence of the pressure loss.

Furthermore, in the case of a siphon type or a siphon jet type toilet, if the force of the washing water supplied to the bowl portion of the toilet or the force of the washing water injected from the jet injection hole toward the trap drainage channel is weak (the water supply pressure is increased). Unless a larger amount of washing water is supplied than in the case of (predetermined value or more), the siphon action cannot be generated, and contaminants and wastewater may not be transported (discharged).

The present invention has been made in order to solve these problems, and an object of the present invention is to provide a small-sized flush water supply device which has a small pressure loss and can be built in a toilet. It is another object of the present invention to provide a flush water supply device that can surely clean the toilet even when the water supply pressure is reduced.

(Means for Solving the Problems) In order to solve the above problems, in the flush water supply device according to the present invention, the control device determines the opening of the flow control valve mechanism based on the output of a flow meter that detects the amount of water supplied to the toilet. It is characterized in that the water supply amount set in advance is supplied to the toilet separately.

The control device may be configured to vary the opening of the flow control valve mechanism so that the output of the flow meter becomes a preset instantaneous flow rate.

Furthermore, if the preset instantaneous flow rate cannot be obtained even when the flow rate control valve mechanism is driven to the fully open state, the control device may be configured to supply a larger amount of water than the preset water supply amount to the toilet.

(Operation) The control device controls the opening degree of the flow control valve mechanism so that the output of the flow meter becomes the preset instantaneous flow rate.

When the instantaneous flow rate is small, the control device supplies a large amount of flush water to the toilet with a longer valve-opening time than usual, so that the waste can be conveyed even when the supply pressure is low.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a siphon type toilet provided with a flush water supply device according to the present invention.

The toilet 1 has a bowl 3 partitioned by a partition 2 and a trap drainage channel 4. The trap drainage channel 4 is formed so that an inflow port 5 formed in the lower portion of the rear wall of the bowl portion 3, the toilet 1 and an outflow port 6 formed in the rear bottom surface are bent in a substantially inverted U-shape to communicate with each other. Enlarged portion at the outlet 6 of the trap drainage channel 4
4a as well as the constricted portion 4b.

A rim water passage 8 is formed in the upper edge rim portion 7 of the bowl portion 3 in an annular shape so as to protrude inward of the bowl portion 3, and rim water outlets 9 are formed on the bottom surface of the rim water passage 8 at appropriate intervals. Part 3
Opened diagonally. The rim water passage 8 communicates with a rim water supply room 10 at the rear.

A box 11 is provided above the rear of the toilet 1, and the box 11
A cleaning water supply device 12 is housed in 11. Cleaning water supply device 12,
A flow control valve mechanism (hereinafter referred to as a valve mechanism) 14 connected to a water supply pipe 13 and a flow meter 15 connected downstream of the valve mechanism 14
And a control unit 16 for opening and closing the valve mechanism 14, and an operation unit 17 for giving a cleaning start input to the control unit 16. Flowmeter
The downstream side of 15 is connected to a water supply port 10a of the rim water supply chamber 10 via an atmosphere release valve 18.

In the present embodiment, an impeller-type flow meter is used as the flow meter 15, and a flow signal is input to the control device 16 via the flow signal line 15a. The flow meter 15 has a magnet attached to the impeller, electromagnetically detects the rotation of the impeller, and uses an alternating electromotive voltage having a frequency proportional to the rotation of the impeller as a flow signal. The flowmeter 15 may be an electromagnetic flowmeter other than the flowmeter of the impeller.

 FIG. 2 is a block diagram of the control device.

The control device 16 includes an input interface circuit 16a, a microprocessor (hereinafter referred to as MPU) 16b, a memory 16c, a timer 16d, and an output interface circuit 16e. The operation unit 17 and the flow meter 15 are connected to the input interface circuit 16a, and the valve mechanism 14 is connected to the output interface circuit 16e via a valve drive line 14a.

The operation unit 17 includes a switch for starting the cleaning of the toilet 1, and opening and closing of the switch is performed by a start signal line 17a.
Is input to the control device 16.

The operation unit 17 may be provided with a plurality of switches so that the supply amount of the washing water can be selected for, for example, stool and urine. In addition, a switch or a sensor for detecting a seat is provided, and these signals are input to the control device 16 to enable the operation of the operation unit 17 only in the seated state, or to change from the seated state to the last seated state. After that, the cleaning may be automatically started after a predetermined time.

The flow rate signal input to the input interface circuit 16a via the flow rate signal line 15a is converted into a waveform in the input interface circuit 16a, and a pulse having a predetermined amplitude and a predetermined pulse width is maintained while maintaining the frequency (period) of the flow rate signal. The signal is converted into a signal and input to the MPU 16b.

In this embodiment, the flow meter 15 is provided downstream of the valve mechanism 14. However, the flow meter 15 may be provided upstream of the valve mechanism 14.

The toilet 1 has a trap drainage channel 4 at the bottom of the bowl portion 3.
It may be a siphon-jet type toilet provided with a jet injection port for injecting washing water from the inflow port 5 into the trap drainage channel 4, or a siphon-vortex type toilet.

Further, a structure in which the flush water supply device 12 is not built in the toilet 1 but may be provided on a wall or the like of a toilet.

Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS. Reference numerals such as S1, S2... Indicate steps in the flowchart.

First, in the case of the flowchart of FIG. 3, in step S1, the control device 16 controls the opening degree of the valve mechanism 14 so that a predetermined instantaneous flow rate is obtained by a start signal from the operation unit 17. As a result, the washing water is supplied to the bowl portion 3 of the toilet bowl 1 and a vortex is generated in the bowl portion 3 to wash the bowl portion 3.

In step S2, it is determined whether or not a preset instantaneous flow rate has been reached. If the instantaneous flow rate has been reached, the process proceeds to step S3, and if not, the process proceeds to step S6.

In step S3, the flow rate is integrated from the output of the flow meter 15. Then, in step S4, it is determined whether or not a predetermined water supply amount has been supplied.
Returning to step S5, if it is determined that water is being supplied, the process proceeds to step S5, where the valve mechanism 14 is closed, and the water supply control ends.

In step S6, it is determined whether or not the valve mechanism 14 is fully open. If the valve mechanism 14 is fully open, the process proceeds to step S7. If not, the process returns to step S7.

Further, in step S7, a new water supply amount is set corresponding to the instantaneous flow rate in order to supply a water supply amount larger than the predetermined water supply amount.

In step S8, the flow rate is integrated from the output of the flow meter 15. Then, it is determined in step S9 whether or not the newly set water supply amount has been supplied.
Returning to step S5, if it is determined that water is being supplied, the process proceeds to step S5, where the valve mechanism 14 is closed, and the water supply control ends.

(Effect of the Invention) As described above, according to the present invention, since the output of the flow meter is processed by the control circuit, the pressure loss can be reduced as compared with the water meter and the location can be reduced regardless of the feed water pressure. Can supply a fixed amount of water.

In addition, when the instantaneous flow rate is small, the amount of water supplied to the toilet is increased, so that the toilet can be reliably washed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a siphon-type toilet provided with a flush water supply device according to the present invention, FIG. 2 is a block diagram of a control device, and FIG. 3 is a flowchart showing the operation of the water supply device. In the drawings, 1 is a toilet bowl, 12 is a flush water supply device, 13 is a water supply pipe,
14 is a flow control valve mechanism, 15 is a flow meter, and 16 is a control device.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinji Shibata 2-8-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kiki Co., Ltd. No. 1 In the Toga Kikai Co., Ltd. Chigasaki factory (56) References JP-A-63-114743 (JP, A) JP-A-63-22931 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , (DB name) E03D 5/10 E03D 3/00

Claims (2)

(57) [Claims] 1. A flow control valve mechanism and a flow meter are provided in a water supply pipe for supplying flush water to a toilet, and a control device of the flow control valve mechanism includes a flow control valve mechanism based on a flow rate output of the flow meter. A cleaning water supply device characterized in that the opening degree of the cleaning water supply device is varied so that a predetermined water supply amount is supplied to the toilet and the flow rate output becomes a predetermined instantaneous flow rate. 2. A flow control valve mechanism and a flow meter are provided in a water supply pipe for supplying flush water to a toilet, and a control device of the flow control valve mechanism includes a flow control valve mechanism based on a flow rate output of the flow meter. The opening degree is made different, and a preset water supply amount is supplied to the toilet, and if the preset instantaneous flow rate cannot be obtained even when the flow rate control valve mechanism is driven to the fully open state, the preset flow rate is set. A flush water supply device configured to supply a larger amount of water to a toilet bowl than the amount of water supplied.