JP2585349Y2 - Cleaning water supply device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush water supply device for supplying flush water to a bowl portion and a jet outlet of a toilet bowl in an arbitrary pattern.

[0002]

2. Description of the Related Art Conventionally, there has been known a flush water supply device for supplying water to a toilet bowl in an arbitrary pattern to a bowl portion and a jet outlet of the toilet bowl for the purpose of saving water. And, in itself, a flush water supply device that controls a flow rate based on a value of a pressure sensor provided in a pipeline so that an appropriate amount of flush water can be supplied to a toilet irrespective of a fluctuation of a water supply pressure is disclosed in Japanese Patent Application Laid-Open Publication No. HEI 9-163568. It is disclosed in Japanese Patent Application Laid-Open No. 3-176520.

[0003] Further, the water supply pressure varies depending on the installation location of the toilet bowl and the usage time. For example, when a flushing device such as a shower device is used in another place, the water supply pressure of the water supply pipe temporarily fluctuates due to the effect. . However, since the user cannot know that the water supply pressure has fluctuated, even in such a case, the user operates the flush start switch after using the toilet to perform flush water supply. In view of this, the applicant has previously proposed in Japanese Patent Application Laid-Open No. 3-90745 that a pressure sensor detects that the water supply pressure is not sufficient for flushing a toilet, and displays that fact.

[0004]

When a washing water supply device for supplying water to the bowl portion and the jet outlet in an arbitrary pattern as described above is combined with a device for displaying the insufficient supply water pressure, which will be described later, the bowl portion and the jet outlet are combined. Even if the water supply pressure for washing the toilet bowl is sufficient when water is supplied to the bowl part because the flow path resistance differs from that of the water supply to the bowl, the water supply pressure may not be sufficient for cleaning the toilet bowl when switching to the jet outlet There is.

The present invention has been made to solve such a problem. The purpose of the present invention is to perform toilet flushing with a small amount of water and to reduce the water supply pressure from a normal value (a pressure at which washing can be reliably performed). It is an object of the present invention to provide a cleaning water supply device which does not perform cleaning sometimes, displays a message indicating that cleaning cannot be reliably performed, and prevents incomplete cleaning.

[0006]

According to a first aspect of the present invention, there is provided a washing water supply device provided at a downstream side of a flow control valve provided in a pipe to which washing water is supplied from a water supply source. A pressure sensor provided; an on-off valve provided in a pipe branching to a bowl section and a jet section of the toilet downstream or upstream of the pressure sensor; and a control section for driving the flow rate control valve and the on-off valve. In the washing water supply device, the control unit stores the flow path resistance characteristics of the bowl unit and the jet unit in advance, and the measured value of the pressure sensor and the flow path characteristics stored in the storage unit. A calculating means for calculating a flow rate-pressure characteristic and a calculating means for predicting a water supply amount to the jet part based on a value of a pressure sensor at the time of water supply to the bowl portion, and supplying the water when the water supply amount is equal to or less than a predetermined value. Indicates that water pressure is insufficient Characterized in that a display means.

Further, in the cleaning water supply apparatus according to the second aspect, when the control unit displays that cleaning water cannot be reliably supplied, the control unit stores that the cleaning start input is given, and detects the detected water supply. When the water pressure reaches a pressure required for washing, the respective on-off valves are driven to supply washing water.

[0008]

According to a first aspect of the present invention, there is provided a flush water supply apparatus for supplying water to a bowl based on a flow rate-pressure characteristic of each household obtained from a measured value of a pressure sensor and a flow path resistance of a bowl and a jet stored in advance. The water supply amount to the jet section is predicted from the water supply pressure at the time of the water supply, and when the water supply amount is equal to or less than a predetermined value, it is displayed that the water supply pressure is insufficient.

According to the second aspect of the present invention, the control section stores the input of the cleaning start input and provides a predetermined value when the supply pressure of the cleaning water supplied to the toilet reaches a pressure necessary for cleaning. Cleaning water supply.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of the flush water supply apparatus according to the present invention.

The washing water supply apparatus 1 includes a washing start switch 2, a control unit 3, a flow rate control valve 5 driven by a geared motor 4, a feed water pressure detection sensor 6 as a pressure sensor, a rim opening / closing valve 8 using a solenoid 7, and a jet. And a power supply 10. The water supply pipe 11 has a flow control valve 5,
Water pressure detection sensor 6 and rim on-off valve 8 provided on branch pipes 12 and 13 branched on the downstream side of water pressure detection sensor 6
Alternatively, they are connected to a bowl portion and a jet portion via a jet opening / closing valve 9.

FIG. 2 is a block diagram of the control unit. The control unit 3 includes a microprocessor (MPU) 3a, an input interface circuit 3b, a memory 3c, a timer 3d, and an output interface circuit 3e, and can be constituted by a one-chip microcomputer called a software servo.

When the feed water pressure detected by the feed water pressure detection sensor 6 is not a normal pressure, the control unit 3 displays the display means 14.
Is displayed in the memory 3c, and an output for driving the on-off valve is generated when the supply water pressure is restored to normal without generating an output for driving the on-off valve. .

FIG. 3 is a graph showing the flow path resistance characteristics of the bowl portion and the jet outlet, and the horizontal axis represents the pressure (unit: Kg).
f / cm ² ), and the vertical axis indicates the flow rate (unit: m ³ / s).

The flow path resistance characteristic is determined by the shape of the toilet (and can be measured in advance when the toilet is manufactured), and is stored in the memory 3c. It should be noted that there is a relationship of Equation 1 between the pressure and the flow rate.

[0016]

(Equation 1)

Here, Q is a flow rate (water supply amount), P is a pressure (water supply pressure), R is a flow path resistance, and K is a constant.

FIG. 4 is a graph showing the flow rate-pressure characteristic inherent to the water supply pipe in each household when the water supply pressure is measured by changing the flow path resistance. The horizontal axis represents the pressure (unit: Kgf / c).
m ² ), and the vertical axis indicates the flow rate (unit: m ³ / s). Where B
One point indicates an open state, and a point B2 indicates a valve water stop state. The flow rate-pressure characteristic changes, for example, from a characteristic curve shown by a solid line in the figure to a characteristic curve shown by a dotted line in a substantially parallel manner by using another device.

In the present invention, as shown in FIG. 5, after the installation of the washing water supply device, the flow rate-pressure characteristics are plotted by the first washing, and the characteristic curve previously stored in the memory 3c is represented by a straight line A. It is obtained by performing linear approximation. Then, the instantaneous flow rate Q1 of the bowl section and the instantaneous flow rate Q2 of the jet section with respect to the water supply pressure in each household can be obtained from the intersections A1 and A2 of the straight line A with the flow path resistance characteristic curves of the bowl section and the jet outlet.

Further, in the next cleaning, the straight line A indicating the flow rate-pressure characteristic approximation may be updated by using the measured value at the time of the previous cleaning. Alternatively, it may be obtained by taking the geometric mean of the measured values two times before and the last time.

When the pressure at the time of supplying water to the bowl part becomes A3 (the flow rate of the bowl part is Q3 at this time) by using other equipment, the flow-pressure characteristic is shown by the solid line as described above. Since the curve changes from a curve to a curve indicated by a dotted line (see FIG. 4), when the flow path resistance characteristics of the bowl portion and the jet outlet are approximated by a straight line B parallel to the straight line A as shown in FIG. From the intersection of the straight line B and the characteristic curve of the jet section, the flow rate Q4 and the pressure A4 of the jet section
Can be requested.

The output interface circuit 3e has a timer 3d
The power of the output of the geared motor 4 and the on-off valve 8,
9 is provided. This output interface circuit 3e is connected to the geared motor 4, the solenoid 7, and the display means 14. When the pressure value detected by the feed water pressure detection sensor 6 is not normal (pressure required for reliably performing washing) (for example, when the pressure is A4 shown in FIG. 6), the display means 14 indicates, for example, "insufficient water pressure". Cleaning is not possible ".

The geared motor 4 integrates a motor and a gear reduction mechanism. The motor sequentially controls energization of a motor driving driver, sequentially switches and excites motor windings of each phase, and drives the motor in a predetermined rotation direction. Is done. The energization control is performed, for example, by outputting a drive signal having a desired pulse width from the control unit and performing pulse width modulation control, that is, by making the on / off frequency constant and making the time width ratio variable. Thereby, the valve element of the flow rate control valve 5 can be driven by a minute distance according to the ratio of the time width, and precise and accurate flow rate control can be performed.

As the electromagnetic on-off valves 10 and 11, for example, a latching solenoid type having a start winding and a recovery winding, and performing pulse driving to open and close the valve only at startup and recovery can be used.

With the above configuration, when power is supplied from the power supply 10 and a washing start input is given from the operation unit, the on-off valve 8 for the rim is opened, and washing water is supplied to the bowl unit. . The flow rate required for jet water supply can be known from the pressure-flow rate characteristics stored in the memory 3c in advance based on the pressure detected by the feed water pressure detection sensor 6 provided in the water supply pipe 11, so that the control unit 3 determines the flow rate. The geared motor 4 is driven to change the opening of the flow control valve 5, to close the rim on-off valve 8 and to open the jet on-off valve 9 to supply washing water to the jet part. Thereafter, the on-off valve 8 is opened again to seal the water and the washing operation is completed.

On the other hand, the controller 3 drives the geared motor 4 to close the rim on-off valve 8 after a predetermined time if the flow required for jet water supply cannot be obtained even with the maximum opening of the flow control valve 5. When the display means 14 displays that water cannot be supplied, the on-off valve 9 for the jet is not opened and the supply of the washing water to the jet section is not performed.

After that, when the pressure detected by the water supply pressure detecting sensor 6 returns to normal, the washing water is supplied to the jet section for a predetermined time, and then the on-off valve 8 is opened to seal the water and the washing operation is completed.

[0028]

As described above, the water supply / cleaning device according to the present invention provides the cleaning / water supply to the jet section when the water supply pressure detected by the water supply pressure detection sensor is less than the pressure required for cleaning. Since it is displayed that cleaning cannot be performed without performing cleaning, insufficient cleaning can be prevented.

Further, the fact that the cleaning start input has been made is stored in the control unit, and when the water supply pressure returns to a normal state, the cleaning water can be supplied to perform the reliable cleaning.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a cleaning water supply device according to the present invention.

FIG. 2 is a block diagram of a control unit.

FIG. 3 is a graph showing channel resistance characteristics of a bowl portion and a jet outlet.

FIG. 4 is a graph showing flow rate-pressure characteristics specific to a water supply pipe in each household.

FIG. 5 is an explanatory diagram when a graph showing a flow rate-pressure characteristic peculiar to a water supply pipe in each household is approximated by a straight line (when the required washing water amount (flow rate) is greater than or equal to).

FIG. 6 is an explanatory diagram when a graph showing the flow rate-pressure characteristic peculiar to a water supply pipe in each household is approximated by a straight line (when the required washing water amount (flow rate) is equal to or less than)

[Explanation of symbols]

1 ... water supply control unit, 2 ... washing start switch, 3 ... control unit,
4 geared motor, 5 flow control valve, 6 feedwater pressure detection sensor, 7 solenoid, 8, 9 open / close valve, 10 power supply,
11 ... water supply pipe, 12, 13 ... branch pipe, 14 ... display means.

────────────────────────────────────────────────── (5) References JP-A-3-176520 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E03D 5/10 E03D 11/02

Claims (2)

(57) [Scope of request for utility model registration] 1. A flow control valve provided in a pipe line to which washing water is supplied from a water supply source, a pressure sensor provided downstream of the flow control valve, a bowl portion of a toilet downstream or upstream of the pressure sensor, and In a washing water supply device including an on-off valve provided in a pipe branching to a jet part, and a control part for driving the flow rate control valve and the on-off valve, the control part is a flow path of the bowl part and the jet part. Storage means for storing resistance characteristics in advance, calculation means for calculating flow rate-pressure characteristics of each household from measured values of the pressure sensor and flow path characteristics stored in the storage means, and pressure at the time of supplying water to the bowl portion Display means for predicting the water supply amount to the jet unit from the calculation means based on the value of the sensor and displaying that the water supply pressure is insufficient when the water supply amount is equal to or less than a predetermined value. Cleaning water supply device. 2. The control unit according to claim 1, wherein when the control unit displays that cleaning water cannot be supplied reliably, the control unit stores that the cleaning start input is given, and detects the supplied water pressure as a pressure required for cleaning. The cleaning water supply apparatus according to claim 1 , wherein the water supply is performed by driving each of the on-off valves when the condition (1) is reached.