JP3620271B2 - Hot water flush toilet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water cleaning toilet, and more particularly to a hot water cleaning toilet in which a water channel is opened and closed using a holding solenoid valve.
[0002]
[Prior art]
As shown in FIG. 7, the hot water flush toilet controls the opening and closing of the hot water supply path to the two nozzles 5a and 5b for the buttock and the bidet according to the operation of the seating switch S and the operation switches SW1, SW2 and SW3. It is configured to be performed by electromagnetic valves V1 and V2 controlled by the unit 1. In the figure, 6 is a mixing unit, 7 is a hot water thermistor, and V3 is an electromagnetic valve for removing cold water.
[0003]
A holding solenoid valve V is generally used for each of the solenoid valves V1, V2, and V3. An example of this type of solenoid valve V is shown in FIG. 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, which 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 in the solenoid SL, but is attached in a closing direction by a spring 23. It has become a force. In the figure, “a” is an inflow passage and “b” is a discharge passage. The inflow path A and the upper space C of the valve body 20 communicate with each other through a small hole (not shown) provided in the valve body 20, and the drain path H is connected to the space D communicating with the upper space c. The drainage port 24 leading to is opened.
[0004]
The plunger 22 closes the drainage port 24 when positioned downward, and opens the drainage port 24 when positioned upward, and is biased downward by a spring 25. The yokes 27 and 28 surrounding the coil 26 in the solenoid SL and the fixed iron core 29 disposed above the plunger 22 are magnetized by the permanent magnet M, and the plan is generated by the magnetic force of the permanent magnet M. The jar 22 keeps both the closed state and the opened state of the drain port 24.
[0005]
As shown on the left side of FIG. 8, when the plunger 22 is lowered and the drain port 24 is closed, the water that has entered the space from the inflow path i has the same water pressure as the inflow path a side. For this reason, the valve body 20 is in contact with the valve seat 21 due to the pressure of the spring 23, and therefore, the flow of water from the inflow path A to the discharge path B is blocked.
In this state, when the solenoid SL coil 26 is energized and the plunger 22 is pulled up against the spring 25 and the drain port 24 is opened, the water in the space C escapes into the drainage channel E. As shown on the right side, the water in the inflow path A pushes the valve body 20 against the spring 23 by the pressure and heads toward the discharge path B. Since the state where the plunger 22 is raised and the drain port 24 is opened is maintained by the magnetic force of the permanent magnet M, the coil 26 need only be energized only at the initial stage.
[0006]
When closing the solenoid valve V, the current in the reverse direction may be passed through the coil 26 as described above. In order for the plunger 22 to descend and close the drain port 24, the valve body 20 is in contact with the valve seat 21 due to the water pressure difference between the upper and lower surfaces and the spring 23, thereby blocking the flow from the inflow path A to the discharge path B. To do. Further, the state in which the plunger 22 closes the drain port 24 is also held by the pressure of the spring 25 and the magnetic force through the yokes 28 and 29 of the permanent magnet M, so that the coil 26 may be energized only at the initial stage. .
[0007]
FIG. 9 shows an example of the drive circuit D of the holding solenoid valve V. A one-way current pulse is supplied to the solenoid SL of the solenoid valve V by an output pulse from the open output port 11 of the control unit 1 composed of a microcomputer, and reverse to the solenoid SL by an output pulse from the closed output port 12 of the control unit 1. Directional current pulses are provided.
[0008]
[Problems to be solved by the invention]
When the holding type solenoid valve V as described above is used, no power is required for holding the closed state or the open state, and power consumption can be suppressed. However, depending on the magnetic force and spring force of the permanent magnet M, Due to the retention, the following problems are sometimes caused.
In other words, due to vibration during transportation and mechanical stress on the solenoid valve V, the solenoid valve V may become open when it must be closed. If water is sent, water will come out of the nozzles 5a and 5b and will be scattered around.
[0009]
The present invention has been made in view of the above points, and the object of the present invention is to provide hot water that can prevent water from being scattered from the nozzle even when the holding solenoid valve is reversed in its open / closed state for some reason. To provide a flush toilet.
[0010]
[Means for Solving the Problems]
Therefore, the present invention provides a warm water flush toilet that supplies washing water to a washing water discharge nozzle through a holding solenoid valve that is held open and closed by magnetic force or spring force. The control unit that changes the open / close state of the holding solenoid valve by outputting a pulse is characterized in that a control unit that outputs a closed output pulse to the holding solenoid valve when the power is turned on is used.
[0011]
Even if the holding type electromagnetic valve that should be closed due to vibration during transportation is in an open state, the holding type electromagnetic valve is forcibly set to a closed state by connection with a power source.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An example of the embodiment of the present invention will be described. In the present invention, the operation shown in the flowchart of FIG. 1 and the operation shown in the time chart of FIG. Let it be done. That is, the control unit 1 composed of a microcomputer performs a reset operation and an initial setting operation at the start of power-on, but thereafter, a closed output operation for the electromagnetic valves V1, V2, and V3 is performed a plurality of times (in the illustrated example, 2). Times).
[0013]
For this reason, the electromagnetic valves V1, V2, and V3 that should be closed due to vibration during transportation are in an open state, and even when this state is maintained by the magnetic force of the permanent magnet M, This prevents the water from being ejected from the nozzles 5a and 5b to wet the surroundings.
FIG. 3 shows a circuit provided with a power supply permission circuit 7 as a countermeasure against malfunction caused by external noise. As shown in FIG. 9, when the solenoid valve drive circuit D receives the open output pulse, the switching elements Q1, Q2, and Q3 are turned on while the output pulse is being output, and the solenoid valve V is unidirectionally directed to the solenoid SL of the solenoid valve V. When a current is supplied and a closed output pulse is received, the switching elements Q4, Q5, and Q6 are turned on and a reverse current is supplied to the solenoid SL while the output pulse is being output. Even if the switching element Q4 is turned on, a current flows through the solenoid SL.
[0014]
In order to prevent malfunction caused by the external noise, the power supply permission circuit 7 supplies power to the solenoid valve drive circuit D and the solenoid valve V only when a closed output pulse or an open output pulse is output from the control unit 1. Specifically, as shown in FIG. 4, the positive side of the DC power source is connected to the emitter collector of the transistor Q7 of the power supply permission circuit 7, and the collector of the transistor Q7 and the positive side of the solenoid valve drive circuit D are connected to each other. And the base of the transistor Q7 is connected to the permission output port 13 of the control unit 1 via the transistor Q8.
[0015]
When the control unit 1 outputs the output pulse from the open output port 11 and the closed output port 12, as shown in FIG. 5, the control unit 1 outputs the permission output pulse from the permission output port 13 at the same time. Q7 is turned on to supply power to the solenoid valve drive circuit D and the solenoid valve V. Since no power is supplied to the solenoid valve drive circuit D and the solenoid valve V when the permission output pulse is not output, malfunction due to external noise does not occur.
[0016]
A diode D1 is preferably connected between the emitter and 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 to the transistor Q7. This counter electromotive current flows to the diode D1, and therefore, between the collector and emitter of the transistor Q7. Thus, no counter electromotive voltage is generated in the transistor Q7, so that the transistor Q7 can be prevented from being damaged by the counter electromotive voltage.
[0017]
【The invention's effect】
As described above, in the present invention, in the hot water flush toilet that supplies the wash water to the wash water discharge nozzle through the hold solenoid valve that holds the open and closed states by magnetic force and spring force, As a control unit that changes the open / close state of the holding solenoid valve by outputting an output pulse to the valve, a control unit 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 in the open state is open, the holding solenoid valve is forcibly set to the closed state by connection with the power supply. The water from the discharge nozzle does not scatter around.
[Brief description of the drawings]
FIG. 1 is a flowchart in 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 the above-described power supply permission circuit.
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 a warm water flush toilet.
FIG. 8 is a cross-sectional view of an example of a holding type electromagnetic valve.
FIG. 9 is a circuit diagram showing a drive circuit for a holding solenoid valve.

Claims (1)

By supplying an output pulse to the holding solenoid valve in a hot water flush toilet that supplies the cleaning water to the nozzle for discharging the washing water through a holding solenoid valve that is kept open and closed by magnetic force and spring force. A warm water flush toilet characterized by using a controller that outputs a closed output pulse to a holding solenoid valve when the power is turned on as a control unit that changes the open / close state of the holding solenoid valve.

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