JPH11269964A - Hot water flush toilet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the splashing of water from a nozzle even if a holding type solenoid valve is changed from an open state to a closed state or vice versa due to some causes. SOLUTION: In a hot water flush toilet, a nozzle for discharging flush water is supplied with flush water through a holding type solenoid valve V which is held open or closed by magnetic or spring forces. A control part 1 which changes the holding type solenoid valve V from an open state to a closed state or vice versa by outputting output pulses to the holding type solenoid valve V is used which outputs a closing output pulse to the holding solenoid valve V at the start of power supply. Even if the holding type solenoid valve V which should be normally be closed is opened because of vibration or the like during transportation, the holding type solenoid valve V is forcibly set into the closed state by being connected to a power supply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water flush toilet, and more particularly to a hot water flush toilet using a holding solenoid valve to open and close a water channel.

[0002]

2. Description of the Related Art As shown in FIG. 7, a hot water flush toilet opens and closes a hot water supply path to two nozzles 5a and 5b for a buttock and a bidet by using a seat switch S and operation switches SW1 and S.
The operation is performed by the solenoid valves V1 and V2 controlled by the control unit 1 in accordance with the operations of W2 and SW3. In the figure, 6 is a mixing unit, 7 is a hot water thermistor, V3
Is a solenoid valve for removing cold water.

[0003] As the above-mentioned solenoid valves V1, V2, V3, a holding type solenoid valve V is generally used. FIG. 8 shows an example of this type of solenoid valve V. In FIG. 8, the left side shows a closed state, and the right side shows an opened state. The valve body 20 of the solenoid valve V that closes the water passage when the valve body 20 formed of a diaphragm contacts the valve seat 21 is not directly connected to the plunger 22 of the solenoid SL, but is attached in the closing direction by a spring 23. It has become a force. In the figure, a is an inflow path and b is a discharge path. Also,
The inflow path A communicates with the upper space C of the valve element 20 through a small hole (not shown) provided in the valve element 20. The space D communicating with the upper space C reaches a drain path E. The drain port 24 is open.

The plunger 22 closes the drain port 24 when it is located below, and the drain port 2 when it is located above.
4 and is urged downward by a spring 25. The yokes 27 and 28 surrounding the coil 26 of the solenoid SL and the fixed iron core 29 disposed above the plunger 22 are magnetized by the permanent magnet M. The jar 22 keeps the drain port 24 closed and open.

Now, as shown on the left side of FIG. 8, when the plunger 22 is lowered to close the drain port 24, the water that has entered the space honeycomb from the inflow passage a is the same as that on the inflow passage a side. In order to have a water pressure, the valve element 20 is in contact with the valve seat 21 due to the pressure of the spring 23, so that the flow of water from the inflow path A to the discharge path B is shut off. In this state, the solenoid S
The coil 26 of L is energized and the plunger 22 is
When the drainage port 24 is opened by pulling up against the water, the water in the space C and the space E escapes to the drainage channel E. As shown in the right side of FIG. Is pushed up against the spring 23 and heads toward the discharge path B. The state in which the plunger 22 is raised and the drain port 24 is open is maintained by the magnetic force of the permanent magnet M, so that the coil 26 needs to be energized only in the initial stage.

When closing the solenoid valve V, a current in the opposite direction may be passed through the coil 26. Since the plunger 22 descends to close the drain port 24, the valve body 20 comes into contact with the valve seat 21 by the water pressure difference between the upper and lower surfaces and the bias of the spring 23 to cut off the flow from the inflow passage A to the discharge passage B. I do. Also, when the plunger 22 closes the drain port 24, the spring 25
And the magnetic force of the permanent magnet M through the yokes 28 and 29, the energization of the coil 26 is required only in the initial stage.

FIG. 9 shows an example of a drive circuit D of the holding type solenoid valve V. Control unit 1 consisting of microcomputer
Output pulse from the open output port 11 of the solenoid valve V
The one-way current pulse is supplied to the solenoid SL, and the reverse current pulse is supplied to the solenoid SL by the output pulse from the closed output port 12 of the control unit 1.

[0008]

When the above-mentioned holding type solenoid valve V is used, no power is required for holding the closed state or the open state, and the power consumption can be reduced. Since the holding depends on the magnetic force or spring force of the magnet M, the following problem sometimes occurs. That is, due to vibration during transportation and mechanical stress on the solenoid valve V, the solenoid valve V may be opened when it should be closed, and in this case, the solenoid valve V When water is sent, water comes out of the nozzles 5a and 5b and scatters around.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent water from escaping from a nozzle even if the holding type solenoid valve is turned on and off for some reason. It is to provide a hot water flush toilet that can be used.

[0010]

SUMMARY OF THE INVENTION Accordingly, the present invention provides hot water cleaning in which cleaning water is supplied to a nozzle for discharging cleaning water through a holding type solenoid valve which maintains an open state and a closed state by a magnetic force or a spring force. In a toilet, as a control unit that changes the open / close state of the holding solenoid valve by outputting an output pulse to the holding solenoid valve, one that outputs a closed output pulse to the holding solenoid valve when the power is turned on is used. Has features.

[0011] Even when the holding solenoid valve which should be closed due to vibration during transportation is in an open state, the holding solenoid valve is forcibly set to a closed state by connection to a power supply.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described. In the present invention, a control unit 1 for controlling the operation of a solenoid valve V is used as a start-up operation by turning on a power supply. The operation shown in the time chart of FIG. In other words, the control unit 1 composed of a microcomputer performs a reset operation and an initial setting operation at the rise of power-on.
The closed output operation for 1, V2, and V3 is performed a plurality of times (twice in the illustrated example).

For this reason, even if the electromagnetic valves V1, V2, and V3, which should be closed due to vibration during transportation, are open and this state is maintained by the magnetic force of the permanent magnet M, the power supply and Is closed at the time of connection, so that water does not spout from the nozzles 5a and 5b and wet the surroundings. FIG. 3 shows a case in which a power supply permission circuit 7 is provided as a countermeasure against malfunction due to external noise. As shown in FIG. 9, when the solenoid valve driving circuit D receives the open output pulse, while the output pulse is being output, the switching elements Q1, Q2, and Q3 are turned on and the solenoid SL of the solenoid valve V moves in one direction. When a current is passed and a closed output pulse is received, the switching elements Q4, Q5, and Q6 are turned on and a reverse current flows to the solenoid SL while the output pulse is being output. Switching element Q4
Is turned on, a current flows through the solenoid SL.

The power supply permitting circuit 7 includes a solenoid valve driving circuit D and a solenoid valve V for preventing malfunction due to the external noise.
Power is supplied only when a closed output pulse or an open output pulse is output from the control unit 1. Specifically, as shown in FIG. The collector of the transistor Q7 of the circuit 7 is connected to the collector of the transistor Q7, the collector of the transistor Q7 is connected to the plus side of the solenoid valve driving circuit D, and the base of the transistor Q7 is connected to the permission output port 13 of the control unit 1 via the transistor Q8. Connecting.

When outputting the output pulse from the open output port 11 and the closed output port 12, the control unit 1 outputs the enable output pulse from the enable output port 13 at the same time as shown in FIG. The transistor Q7 is turned on via the power supply to supply power to the solenoid valve driving circuit D and the solenoid valve V. When the permission output pulse is not output, power is not supplied to the solenoid valve driving circuit D and the solenoid valve V, so that malfunction due to external noise does not occur.

Preferably, a diode D1 is connected between the emitter and the collector of the transistor Q7 as shown in FIG. When the transistor Q7 is turned off,
A reverse current from the coil 26 of the solenoid SL of the solenoid valve V tends to flow through the transistor Q7. However, since this back electromotive current flows through the diode D1, no back electromotive voltage is generated between the collector and the emitter of the transistor Q7. Therefore, it is possible to prevent the transistor Q7 from being damaged by the back electromotive force.

[0017]

As described above, in the present invention, the flush water is supplied to the flush water discharge nozzle through the holding type solenoid valve which keeps the open state and the closed state by the magnetic force or the spring force. In, as the control unit that changes the open / close state of the holding solenoid valve by outputting an output pulse to the holding solenoid valve, a controller that outputs a closed output pulse to the holding solenoid valve when the power is turned on is used. Even if the holding solenoid valve that should be closed due to vibration during transportation is open, the holding solenoid valve is forcibly set to the closed state by connecting to the power supply. Immediately after construction, water from the nozzle for discharging cleaning water does not scatter around.

[Brief description of the drawings]

FIG. 1 is a flowchart according to an example of an embodiment of the present invention.

FIG. 2 is a time chart showing the operation of the above.

FIG. 3 is a block circuit diagram of another example.

FIG. 4 is a specific circuit diagram of a power supply permission circuit according to the embodiment.

FIG. 5 is a time chart showing the operation of the above.

FIG. 6 is a specific circuit diagram of another example of the power supply permission circuit of the above.

FIG. 7 is a block diagram of the overall configuration of the hot water flush toilet.

FIG. 8 is a sectional view of an example of a holding type solenoid valve.

FIG. 9 is a circuit diagram showing a drive circuit of the holding solenoid valve.

Claims (1)

[Claims] 1. A hot water flush toilet in which flush water is supplied to a flush water discharge nozzle through a retaining solenoid valve that maintains an open state and a closed state by a magnetic force or a spring force. A warm water flush toilet characterized by using a controller that outputs a closed output pulse to the holding solenoid valve when the power is turned on, as a control unit that changes the open / close state of the holding solenoid valve by outputting the output.