WO2019137233A1

WO2019137233A1 - Water stop control method and circuit for solenoid valve of intelligent toilet

Info

Publication number: WO2019137233A1
Application number: PCT/CN2018/124541
Authority: WO
Inventors: 吴�琳; 林凌锋
Original assignee: 李晓琰
Priority date: 2018-01-10
Filing date: 2018-12-28
Publication date: 2019-07-18
Also published as: CN108194684A; CN108194684B

Abstract

A water stop control method and circuit for a solenoid valve of an intelligent toilet. The water stop control method comprises: by using a direct current demagnetization method, first providing a forward current at time t1 for a solenoid valve, and then providing a reverse current at time t2 for the solenoid valve. The control circuit comprises a control module and a signal generation module, wherein an output end of the control module is connected to an input end of the signal generation module, and an output end of the signal generation module is connected to the solenoid valve; under the control of the control module, the signal generation module generates a forward/reverse current, so that water outlet, water stop, and demagnetization of the solenoid valve are implemented. The technical solution can resolve, by means of a simple modification, the problem that a solenoid valve is unable to stop water after being used for a long time.

Description

Intelligent toilet seat solenoid valve water stop control method and control circuit

Technical field

The invention relates to a smart toilet circuit structure, in particular to a solenoid valve water stop control method, and a phase The control circuit structure should be.

Background technique

The soft magnetic water stop spool of the normally closed solenoid valve will be frequently used after the multiple use solenoid valve of the intelligent toilet The remanence phenomenon occurs in the opening and closing, and the water stop valve core still has a magnetic force after the power is removed from the external magnetic field, causing the valve core to be adsorbed on the fixed iron core and the water cannot be stopped.

In order to solve the above problem, the existing method is to demagnetize the water stop valve core. According to the use environment, etc. The demagnetization method used is high temperature heating, vibration, and providing a reverse external magnetic field. Among them, the design of the reverse external magnetic field becomes the most common method because of the advantages of less auxiliary means and easy operation. Existing reverse magnetic field methods need to increase degaussing Electronic components such as power supplies, diodes, or compensation coils, or methods that modify the solenoid valve spool.

Technical solution

The object of the present invention is to provide a smart toilet electromagnetic valve water stop control method and control circuit, which can Through simple modification, the problem that the solenoid valve cannot stop water after long-term use is solved.

In order to achieve the above object, the solution of the present invention is:

A smart toilet electromagnetic valve water stopping control method adopts a DC demagnetization method, firstly providing a forward current of t1 time for a solenoid valve, and providing a reverse current of a t2 time for a solenoid valve.

The above t2 is set by measuring a large number of magnetic inductions by Gaussian measurement, and obtaining a corresponding curve relationship, thereby setting the time accordingly.

The magnetic induction intensity corresponding to the t2 is 0 to 1 mT.

The magnetic induction intensity corresponding to the t2 is 0.4 mT.

Intelligent toilet solenoid valve water stopping control circuit, comprising a control module and a signal generating module, wherein The output end of the module is connected to the input end of the signal generating module, and the output end of the signal generating module is connected to the electromagnetic valve. Under the control of the control module, the signal generating module generates a forward and reverse current, thereby realizing the water discharge, water stop and degaussing of the electromagnetic valve. .

The above control module uses a single chip microcomputer.

The signal generating module includes a solenoid valve driving chip, a first resistor and a second resistor, wherein the solenoid valve is driven The chip has a first control end, a second control end, and a first output end and a second output end. The first control end is connected to the first control signal, and the second control end is connected to the second control signal. The first and second control signals are both Is the logic control level, defined as follows:

When the logic of the first control signal is 1 and the logic of the second control signal is 0, the first output terminal is a forward voltage and the second output terminal forms a loop with the first output terminal, which is defined as a forward current;

When the logic of the first control signal is 0 and the logic of the second control signal is 1, the second output terminal is a forward voltage and the first output end forms a loop with the second output end, which is defined as a reverse current;

When the logic of the first control signal is 1 and the logic of the second control signal is 1, the first output terminal and the second output terminal voltage drop rapidly to 0;

When the logic of the first control signal is 0 and the logic of the second control signal is 0, the voltages of the first output terminal and the second output terminal are both zero.

The signal generating module includes a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, and a second NMOS transistor, wherein the four MOS transistors are connected to form an H-bridge circuit; the control module outputs a first control signal and a second control a signal, the first control signal is connected to the first PMOS transistor, the control end of the first NMOS transistor, the second control signal is connected to the control end of the second PMOS transistor and the second NMOS transistor; and the connection between the first PMOS transistor and the first NMOS transistor As a first output end of the signal generating module, a connection between the second PMOS transistor and the second NMOS transistor serves as a second output end of the signal generating module, and the two output ends are respectively connected to two ends of the electromagnetic valve, the first and the second control The signals are all logic control levels and are defined as follows:

When the logic of the first control signal is 1 and the logic of the second control signal is 0, the first PMOS transistor and the second NMOS transistor are turned off, the first NMOS transistor and the second PMOS transistor are turned on, and the second output terminal is forward. Voltage and the second output forms a first output Loop, which is defined as forward current at this time;

When the logic of the first control signal is 0 and the logic of the second control signal is 1, the first PMOS transistor and the second NMOS transistor are turned on, the first NMOS transistor and the second PMOS transistor are turned off, and the first output terminal is forward. Voltage and the first output and the second output form Loop, which is defined as reverse current at this time;

When the logic of the first control signal is 1 and the logic of the second control signal is 1, the first PMOS transistor and the second PMOS transistor are turned off, and the first NMOS transistor and the second NMOS transistor are turned on, the first output terminal and the second output terminal are The output is formed into a loop, which is defined as fast at this time. Speed discharge

When the logic of the first control signal is 0 and the logic of the second control signal is 0, the first PMOS transistor and the second PMOS transistor are turned on, the first NMOS transistor and the second NMOS transistor are turned off, and the first output terminal and the first The two output voltages are equal.

Beneficial effect

After adopting the above scheme, the invention does not need to add electronic components in the circuit, and does not need to be directed to the solenoid valve. The line-specific design, on the basis of the original electronic control circuit and solenoid valve, only need to modify the control circuit board. On the other hand, this design control circuit and control strategy can solve the problem that the solenoid valve cannot stop water after long-term use.

DRAWINGS

Figure 1 is a circuit schematic diagram of a first embodiment of the present invention;

Figure 2 is a timing chart of control signals of the first embodiment of the present invention;

Figure 3 is a control flow chart of the first embodiment of the present invention;

Figure 4 is a graph showing the relationship between the magnetic induction intensity and the degaussing time after degaussing;

Figure 5 is a circuit diagram of a second embodiment of the present invention.

Embodiments of the invention

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

The invention provides a smart toilet electromagnetic valve water stopping control method, which comprises the following contents: adopting DC demagnetization The method firstly provides the forward current of the t1 time for the solenoid valve, and provides the reverse current of the t2 time for the solenoid valve; wherein the time of t2 is set according to the specific situation, and the magnetic induction intensity of the group can be measured by the Gauss meter through experiments. , the corresponding curve relationship is obtained, so that the time is set accordingly.

The invention also provides a smart toilet electromagnetic valve water stop control circuit, comprising a control module and a signal generating module a block, wherein an output end of the control module is connected to an input end of the signal generating module, and an output end of the signal generating module is connected to the electromagnetic valve, and under the control of the control module, the signal generating module generates a forward and reverse current, thereby realizing the water discharge of the electromagnetic valve Water stop And degaussing.

As shown in FIG. 1 , it is a specific implementation circuit diagram of the present invention. The control module uses an 8-bit single-chip microcomputer, and the single-chip microcomputer has a timer function to generate control signals 1 and 2; the signal generating module includes a solenoid valve drive. The chip Q1, the first resistor R8 and the second resistor R10, wherein Q1 has a first control terminal RIN, a second control terminal FIN and a first output terminal OUT1, a second output terminal OUT2, and the first control terminal RIN is connected to the control signal 1 The second control terminal FIN is connected to the control signal 2, and the control signals 1, 2 are both logic control levels, and are defined as follows:

When the logic of control signal 1 is 1 and the logic of control signal 2 is 0, the first output terminal Out1 is +12V voltage and the Out2 output forms a loop with Out1, which is defined as forward current.

When the logic of control signal 1 is 0 and the logic of control signal 2 is 1, the second output terminal Out2 is +12V voltage and the Out1 output forms a loop with Out2, which is defined as reverse current.

When the logic of the first control signal is 1 and the logic of the second control signal is 1, the voltages of the first output terminal and the second output terminal rapidly fall to 0, and the solenoid valve is rapidly discharged.

When the logic of the control signal 1 is 0 and the logic of the control signal 2 is 0, the first output terminal Out1 and the second output terminal The Out2 voltage is 0, and the solenoid valve is not energized.

In this embodiment, the timing relationship of the control signals 1, 2 is as shown in FIG. 2, and at the same time, as shown in FIG. 3, in the working example, when the water needs to be used, the electromagnetic valve needs to be turned on, and the forward current is turned on. A positive magnetic field is generated and the solenoid valve is attracted. When it is necessary to cut off the water, the solenoid valve needs to be closed. At this time, it is first judged whether the demagnetization program is triggered, and after entering the demagnetization program, the reverse is applied. The current produces a reverse magnetic field. The time is calculated by the timer, and the degaussing time is determined according to FIG. Since the solenoid valve also has a spring to control the water stop effect of the water stop valve core, the demagnetization does not need to perform a severe complete demagnetization effect, and only needs to ensure the residual magnetic effect. The magnetic force should be generated less than the spring force of the spring. As shown in Figure 4, the magnetic induction intensity after degaussing can be effective at 1mT. To close the solenoid valve, in order to ensure the effective closing of the solenoid valve, the magnetic induction intensity after degaussing is set at 0.4mT. Finally, by controlling the driving chip to release the remaining power of the solenoid valve, excessive demagnetization is prevented to cause reverse remanence.

As shown in FIG. 5, it is another implementation circuit diagram of the present invention. The control module is configured to generate logic control levels, which are control signals 1, 2, respectively. The signal generation module includes two PMOS transistors Q1, Q4 and two NMOS. The tubes Q2, Q3, and Q1-Q4 are connected to form a solenoid valve driving circuit, and the control signal 1 is connected to the control terminals of Q1 and Q2, and the control signal 2 is connected to the control terminals of Q3 and Q4; the connection of Q1 and Q2 serves as a signal generating module. At the output end, the connection of Q3 and Q4 serves as the other output end of the signal generating module, and the two output ends are respectively connected to both ends of the solenoid valve.

When the logic of control signal 1 is 1 and the logic of control signal 2 is 0, Q1 and Q3 are turned off, Q2 and Q4 are turned on, output Out2 is +12V voltage, and Out2 output forms a loop with Out1, which is defined as forward current. .

When the logic of control signal 1 is 0 and the logic of control signal 2 is 1, Q1 and Q3 are turned on, Q2 and Q4 are turned off, output Out1 is +12V voltage, and Out1 output forms a loop with Out2, which is defined as reverse current. .

When the logic of control signal 1 is 1 and the logic of control signal 2 is 1, Q1 and Q4 are turned off, Q2 and Q3 are turned on, and the output Out1 and Out2 voltages are quickly dropped to 0, and the solenoid valve is rapidly discharged.

When the logic of control signal 1 is 0 and the logic of control signal 2 is 0, Q1 and Q4 are turned on, Q2 and Q3 are turned off, and outputs Out1 and Out2 are equal in voltage, and no current flows through the solenoid valve.

The above embodiments are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention cannot be limited thereto. According to the technical idea of the present invention, any modifications made on the basis of the technical solutions are within the scope of the present invention.

Claims

The utility model relates to a smart toilet electromagnetic valve water stopping control method, which is characterized in that: a DC demagnetization method is adopted, firstly a solenoid valve A forward current of t1 time is provided, and a reverse current of t2 time is provided for the solenoid valve.
The method for controlling water stop of a solenoid valve of a smart toilet according to claim 1, wherein the setting method of the t2 is: using an experiment, using a Gaussian meter to measure a plurality of sets of magnetic induction intensities, and obtaining a corresponding curve relationship. And thus time Make the appropriate settings.
A smart toilet electromagnetic valve water stop control method according to claim 2, wherein said t2 corresponds to a magnetic induction intensity of 0 to 1 mT.
A method for controlling water stop of a solenoid valve of a smart toilet according to claim 3, wherein the magnetic induction intensity corresponding to said t2 is 0.4 mT.
A smart toilet electromagnetic valve water stop control circuit, comprising: a control module and a signal generating module, The output end of the control module is connected to the input end of the signal generating module, and the output end of the signal generating module is connected to the electromagnetic valve. Under the control of the control module, the signal generating module generates a forward and reverse current, thereby realizing the water discharge of the electromagnetic valve. Water and Degaussing.
A smart toilet solenoid valve water stop control circuit according to claim 5, wherein said control module uses a single chip microcomputer.
A smart toilet solenoid valve water stop control circuit according to claim 5, wherein said signal generating module comprises a solenoid valve driving chip, a first resistor and a second resistor, wherein the solenoid valve driving chip has a One control a first control terminal and a first output end, a second output end, the first control end is connected to the first control signal, and the second control end is connected to the second control signal, and the first control signal is a logic control level , defined as follows:

When the logic of the first control signal is 1 and the logic of the second control signal is 0, the first output terminal is a forward voltage and the second output terminal forms a loop with the first output terminal, which is defined as a forward current;

When the logic of the first control signal is 0 and the logic of the second control signal is 1, the second output terminal is a forward voltage and the first output end forms a loop with the second output end, which is defined as a reverse current;

When the logic of the first control signal is 1 and the logic of the second control signal is 1, the first output terminal and the second output terminal voltage drop rapidly to 0;

When the logic of the first control signal is 0 and the logic of the second control signal is 0, the voltages of the first output terminal and the second output terminal are both zero.
A smart toilet solenoid valve water stop control circuit according to claim 5, wherein said signal generating module comprises a first PMOS transistor, a second PMOS transistor, a first NMOS transistor and a second NMOS transistor, The four MOS tubes are connected to form a solenoid valve driving circuit; the control module outputs a first control signal and a second control signal, the first control signal is connected to the first PMOS tube, the control end of the first NMOS tube, and the second control signal is connected. Control end of the second PMOS transistor and the second NMOS transistor; The connection between the PMOS transistor and the first NMOS transistor serves as a first output end of the signal generating module, and the connection of the second PMOS transistor and the second NMOS transistor serves as a second output end of the signal generating module, and the two output terminals are respectively connected to the electromagnetic valve Both ends, first and second controls The signal is a logic control level and is defined as follows:

When the logic of the first control signal is 1 and the logic of the second control signal is 0, the first PMOS transistor and the second NMOS transistor are turned off, the first NMOS transistor and the second PMOS transistor are turned on, and the second output terminal is forward. Voltage and the second output forms a first output Loop, which is defined as forward current at this time;

When the logic of the first control signal is 0 and the logic of the second control signal is 1, the first PMOS transistor and the second NMOS transistor are turned on, the first NMOS transistor and the second PMOS transistor are turned off, and the first output terminal is forward. Voltage and the first output and the second output form Loop, which is defined as reverse current at this time;

When the logic of the first control signal is 1 and the logic of the second control signal is 1, the first PMOS transistor and the second PMOS transistor are turned off, and the first NMOS transistor and the second NMOS transistor are turned on, the first output terminal and the second output terminal are The output is formed into a loop, which is defined as fast at this time. Speed discharge

When the logic of the first control signal is 0 and the logic of the second control signal is 0, the first PMOS transistor and the second PMOS transistor are turned on, the first NMOS transistor and the second NMOS transistor are turned off, the first output terminal and the second The output voltages are equal.