阅读说明：本技术 一种直流低压电动阀的控制方法 (Control method of direct-current low-voltage electric valve ) 是由 周荣华 张红兵 鲍国翼 刘亨平 于 2018-08-19 设计创作，主要内容包括：本发明公开了一种直流低压电动阀的控制方法,包括控制端和电动阀端,所述控制端发送指令,具体包括以下步骤：S11：当需要电动阀开启的时候,将L1和N分别连接到AC220V的L和N；S12：当需要电动阀关闭的时候,将L2和N分别连接到AC220V的L和N；S13：涉及直流低压电动阀技术领域。该直流低压电动阀的控制方法,通过将控制电缆线取消,只留一根电源电缆线；但是这根电源电缆线是三芯电缆线,同时设计一个新的电动阀的电路板,使其通过交替断电的方式来“读取”控制信号,以确定电动阀的动作(开启或关闭),减少了连接电缆线,降低了故障率,杜绝了“误读”控制信号的问题,使得电动阀能够准确地按照控制指令进行动作。(The invention discloses a control method of a direct-current low-voltage electric valve, which comprises a control end and an electric valve end, wherein the control end sends an instruction, and the control method specifically comprises the following steps: s11: when the electric valve is required to be opened, L1 and N are connected to L and N of AC220V, respectively; s12: when the electric valve needs to be closed, connecting L2 and N to L and N of AC220V respectively; s13: relates to the technical field of direct-current low-pressure electric valves. According to the control method of the direct-current low-voltage electric valve, the control cable is cancelled, and only one power cable is reserved; however, the power cable is a three-core cable, and a new circuit board of the electric valve is designed at the same time, so that the control signal is read in an alternate power-off mode to determine the action (opening or closing) of the electric valve, thereby reducing the connecting cable, lowering the failure rate, avoiding the problem of 'misreading' the control signal, and enabling the electric valve to accurately act according to the control instruction.)

1. A method of controlling a dc low pressure electric motor valve comprising a control end and an electric valve end, characterized by: the control end sends the instruction, and the method specifically comprises the following steps:

s11: when the electric valve is required to be opened, L1 and N are connected to L and N of AC220V, respectively;

s12: when the electric valve needs to be closed, connecting L2 and N to L and N of AC220V respectively;

s13: when the state of the electric valve needs to be maintained, all of L1, L2 and N are disconnected from the AC 220V;

the electric valve end receives and executes instructions, and specifically comprises the following steps:

s21: at the beginning, in a power-off state, the relays RY1 and RY2 are also in an inactive state, and normally closed contacts (J11 and J21) of the two relays are closed;

s22: when L1 or L2 is electrified, the power supply connects the power supply to the circuit board through a contact (J11) of the relay RY1 or a contact (J21) of the relay RY2, so that the circuit board is electrified again and starts to work; at this time, the MCU does not know which wire the power is connected through, so the MCU assumes an assumed state according to the EEPROM stored inside the chip, the assumed state including two states: "L1 charged" and "L2 charged", the initial values are: "L1 is powered"; the reverse state of the last time is stored later;

s23: the first assumption is that: when the L1 is electrified, the assumed state of the EEPROM is changed from 'L1 electrified' to 'L2 electrified' and is stored, then the relay RY2 is electrified and acts to disconnect the L2 from the circuit board, only the L1 is connected with the circuit board, and the actual situation that the L1 and the L2 are electrified is described in two cases: the first method comprises the following steps: if the L1 is electrified, the operation of the circuit board is not influenced, so that the assumed state of the program is established (actually, the L1 is electrified) and the action of the electric valve is executed according to the command that the L1 is electrified; if the L2 is electrified, the whole circuit board is disconnected (power is lost) from a power supply, the circuit board does not work, the two relays return to the initial state, the contact (J21) of the RY2 is closed again, the circuit board is electrified again to work, the MCU assumes according to the assumed state of the EEPROM stored in the chip, and the assumed state at this time is 'L2 electrified';

s24: the second assumption is that: when L2 is electrified, the assumed state of EEPROM is changed into 'L1 is electrified' and stored, then relay RY1 is electrified to act, L1 is disconnected from the circuit board, only L2 is left to be connected with the circuit board, and the actual situation that L1 and L2 are electrified is described in 2 cases: in the first case: if the L2 is electrified, the operation of the circuit board is not influenced, so that the assumed state of the program is established (actually, the L2 is electrified) and the action of the electric valve is executed according to the command that the L2 is electrified; in the second case: if the L1 is electrified, the whole circuit board is disconnected (power is lost) from the power supply, the circuit board does not work, 2 relays all return to the initial state, the contact (J11) of the RY1 is closed again, the circuit board is electrified again to work, the MCU assumes according to the assumed state of the EEPROM stored in the chip, and the assumed state at this time is L1 electrified.

2. A control method of a direct current low pressure electric valve according to claim 1, characterized in that: in step S11, L1 of the electric valve end is powered, and L2 is not powered.

3. A control method of a direct current low pressure electric valve according to claim 1, characterized in that: in step S12, L2 of the electric valve end is powered, and L1 is not powered.

4. A control method of a direct current low pressure electric valve according to claim 1, characterized in that: in step S13, both L1 and L2 of the electric valve end are electroless.

5. A control method of a direct current low pressure electric valve according to claim 1, characterized in that: when the L1 and the L2 are not powered, the circuit board does not work, and the electric valve keeps the original state.

6. A control method of a direct current low pressure electric valve according to claim 1, characterized in that: when both L1 and L2 are powered, it can be seen from the above that the circuit board will operate according to the state stored inside, and the operation at this time may be wrong, so that it is avoided from the control end that both L1 and L2 are powered.

Technical Field

The invention relates to the technical field of direct-current low-voltage electric valves, in particular to a control method of a direct-current low-voltage electric valve.

Background

With the development of the water treatment industry, the demand on water purification equipment is higher and higher. The various water valves in the water purification apparatus are relatively critical components. Water valves typically operate by means of an electrically operated valve. For safety reasons, the electric valve is generally powered by direct current low voltage (24V), and the opening (or closing) of the electric valve can be remotely controlled. Because the number of the electric water valves (electric valves for short) in the water purification equipment is large, the electric water valves are matched with each other and opened (or closed) according to a certain rule to complete the water purification function, and most of the water purification equipment is unattended, the control reliability and accuracy of the electric valves are high; the control of any one of the electrically operated valves, if abnormal, may result in the whole water purification apparatus not being supplied with water properly.

As shown in the first figure, the method of controlling an electric valve is generally as follows: a power cord (AC 220V) and a control cord (weak current) are connected from the control panel to the remote electric valves, respectively, the power cord providing power to the electric valves and the control cord providing control signals for the electric valves, each electric valve having a circuit board. The circuit board converts electrical AC220 to DC24V and DC 5V; the DC24V provides a working power supply for the electric valve, and the DC5V provides a working power supply for the MCU and the control circuit of the circuit board; the working principle is as follows: the MCU detects a signal (0V-5V) on the control line and correspondingly acts (opens or closes) on the electric valve.

The problems of the existing method are: two cables must be used: a power line and a control line; the electric valve cannot work normally when any cable line fails; the probability of failure is increased, and the control signal is a low-voltage signal (weak signal) and is easy to be interfered; if the circuit board of the electric valve reads control signals in error, the execution of the electric valve is disordered.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a control method of a direct-current low-voltage electric valve, which solves the problems that the existing method increases the probability of failure, is easily interfered and simultaneously easily causes the execution of the electric valve to be disordered.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a control method of a direct-current low-voltage electric valve comprises a control end and an electric valve end, wherein the control end sends a command, and the control method specifically comprises the following steps:

s11: when the electric valve is required to be opened, L1 and N are connected to L and N of AC220V, respectively;

s12: when the electric valve needs to be closed, connecting L2 and N to L and N of AC220V respectively;

s13: when the state of the electric valve needs to be maintained, all of L1, L2 and N are disconnected from the AC 220V;

the electric valve end receives and executes instructions, and specifically comprises the following steps:

s21: at the beginning, in a power-off state, the relays RY1 and RY2 are also in an inactive state, and normally closed contacts (J11 and J21) of the two relays are closed;

s22: when L1 or L2 is electrified, the power supply connects the power supply to the circuit board through a contact (J11) of the relay RY1 or a contact (J21) of the relay RY2, so that the circuit board is electrified again and starts to work; at this time, the MCU does not know which wire the power is connected through, so the MCU assumes an assumed state according to the EEPROM stored inside the chip, the assumed state including two states: "L1 charged" and "L2 charged", the initial values are: "L1 is powered"; the reverse state of the last time is stored later;

s23: the first assumption is that: when the L1 is electrified, the assumed state of the EEPROM is changed from 'L1 electrified' to 'L2 electrified' and is stored, then the relay RY2 is electrified and acts to disconnect the L2 from the circuit board, only the L1 is connected with the circuit board, and the actual situation that the L1 and the L2 are electrified is described in two cases: the first method comprises the following steps: if the L1 is electrified, the operation of the circuit board is not influenced, so that the assumed state of the program is established (actually, the L1 is electrified) and the action of the electric valve is executed according to the command that the L1 is electrified; if the L2 is electrified, the whole circuit board is disconnected (power is lost) from a power supply, the circuit board does not work, the two relays return to the initial state, the contact (J21) of the RY2 is closed again, the circuit board is electrified again to work, the MCU assumes according to the assumed state of the EEPROM stored in the chip, and the assumed state at this time is 'L2 electrified';

s24: the second assumption is that: when L2 is electrified, the assumed state of EEPROM is changed into 'L1 is electrified' and stored, then relay RY1 is electrified to act, L1 is disconnected from the circuit board, only L2 is left to be connected with the circuit board, and the actual situation that L1 and L2 are electrified is described in 2 cases: in the first case: if the L2 is electrified, the operation of the circuit board is not influenced, so that the assumed state of the program is established (actually, the L2 is electrified) and the action of the electric valve is executed according to the command that the L2 is electrified; in the second case: if L1 is powered, the entire circuit board will be disconnected from the power source (power loss), the circuit board will not operate, and 2 relays will all return to the initial state. The contact (J11) of RY1 is closed again, and the circuit board is electrified again to work. The MCU assumes an assumed state of the EEPROM stored inside the chip, at which time the assumed state is "L1 powered".

Further, in step S11, L1 of the electric valve end is powered, and L2 is not powered.

Further, in step S12, L2 of the electric valve end is powered, and L1 is not powered.

Further, in step S13, both L1 and L2 of the electric valve end are electroless.

Further, when neither L1 nor L2 is powered, the circuit board does not operate and the powered valve remains in its original state.

Further, when both L1 and L2 are powered, it can be seen from the above that the circuit board will operate according to the state stored inside, and the operation at this time may be erroneous. So from the control side it is avoided that both L1 and L2 are powered at the same time.

(III) advantageous effects

The invention has the following beneficial effects: according to the control method of the direct-current low-voltage electric valve, the control cable is cancelled, and only one power cable is reserved; however, the power cable is a three-core cable, and a new circuit board of the electric valve is designed at the same time, so that the control signal is read in an alternate power-off mode to determine the action (opening or closing) of the electric valve, thereby reducing the connecting cable, lowering the failure rate, avoiding the problem of 'misreading' the control signal, and enabling the electric valve to accurately act according to the control instruction.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

FIG. 1 is a circuit diagram illustrating a conventional method;

FIG. 2 is a circuit diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1-2, an embodiment of the present invention provides a technical solution: a control method of a direct-current low-voltage electric valve comprises a control end and an electric valve end, wherein the control end sends a command, and the control method specifically comprises the following steps:

s11: when the electric valve is required to be opened, connecting L1 and N to L and N of AC220V respectively, wherein in the step S11, L1 at the electric valve end is electrified, and L2 is not electrified;

s12: when the electric valve needs to be closed, connecting L2 and N to L and N of AC220V respectively, wherein in the step S12, L2 at the electric valve end is electrified, and L1 is not electrified;

s13: when the state of the electric valve needs to be maintained, all L1, L2 and N are disconnected from AC220V, and in the step S13, L1 and L2 of the electric valve end are all electroless;

the electric valve end receives and executes instructions, and specifically comprises the following steps:

s21: at the beginning, in a power-off state, the relays RY1 and RY2 are also in an inactive state, and normally closed contacts (J11 and J21) of the two relays are closed;

s22: when L1 or L2 is electrified, the power supply connects the power supply to the circuit board through a contact (J11) of the relay RY1 or a contact (J21) of the relay RY2, so that the circuit board is electrified again and starts to work; at this time, the MCU does not know which wire the power is connected through, so the MCU assumes an assumed state according to the EEPROM stored inside the chip, the assumed state including two states: "L1 charged" and "L2 charged", the initial values are: "L1 is powered"; the reverse state of the last time is stored later;

s23: the first assumption is that: when the L1 is electrified, the assumed state of the EEPROM is changed from 'L1 electrified' to 'L2 electrified' and is stored, then the relay RY2 is electrified and acts to disconnect the L2 from the circuit board, only the L1 is connected with the circuit board, and the actual situation that the L1 and the L2 are electrified is described in two cases: the first method comprises the following steps: if the L1 is electrified, the operation of the circuit board is not influenced, so that the assumed state of the program is established (actually, the L1 is electrified) and the action of the electric valve is executed according to the command that the L1 is electrified; if the L2 is electrified, the whole circuit board is disconnected (power is lost) from a power supply, the circuit board does not work, the two relays return to the initial state, the contact (J21) of the RY2 is closed again, the circuit board is electrified again to work, the MCU assumes according to the assumed state of the EEPROM stored in the chip, and the assumed state at this time is 'L2 electrified';

s24: the second assumption is that: when L2 is electrified, the assumed state of EEPROM is changed into 'L1 is electrified' and stored, then relay RY1 is electrified to act, L1 is disconnected from the circuit board, only L2 is left to be connected with the circuit board, and the actual situation that L1 and L2 are electrified is described in 2 cases: in the first case: if the L2 is electrified, the operation of the circuit board is not influenced, so that the assumed state of the program is established (actually, the L2 is electrified) and the action of the electric valve is executed according to the command that the L2 is electrified; in the second case: if L1 is powered, the entire circuit board will be disconnected from the power source (power loss), the circuit board will not operate, and 2 relays will all return to the initial state. The contact (J11) of RY1 is closed again, and the circuit board is electrified again to work. The MCU assumes the assumed state of the EEPROM stored in the chip, which is "L1 powered", when neither L1 nor L2 is powered, the circuit board does not operate, the motor-operated valve remains in the original state, and when both L1 and L2 are powered, the circuit board operates according to the state stored in the chip, which may be wrong. So from the control side it is avoided that both L1 and L2 are powered at the same time.

Embodiments of the present invention are described below with reference to fig. 1 and 2:

AC220V refers to the mains supply voltage, which may actually be AC 110V;

DC24V is the electric valve control voltage, and is a safe voltage level, and actually it may be DC36V or other safe voltage levels;

DC5V is a chip control voltage, which may also be DC3.3V in practice.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.