阅读说明：本技术 一种电控式流体饲料喷洒设备及系统 (Automatically controlled formula fluid feed spraying apparatus and system ) 是由 陈湘云 刘绍春 周锡勋 曾芸芸 樊均德 于 2021-06-25 设计创作，主要内容包括：本发明公开了一种电控式流体饲料喷洒设备及系统,包括液泵和进液通道和喷洒通道；还包括用于控制进液通道和喷洒通道的电控阀门,电控阀门为2个单通道阀门或一个电控三通阀；容器与液泵的入口端相连,液泵的出口端与进液通道和喷洒通道相连；容器用于制备或存储流体饲料；基于电控单通道阀的流体饲料喷洒设备还包括液泵正反转控制电路以及阀门控制电路；阀门控制电路用于控制电控阀门的开闭,且保障2个单通道阀门的在工作时的开关状态为互斥状态,或者保障电控三通阀每个时刻最多只能有一条通道导通。该电控式流体饲料喷洒设备及系统采用简便的方法能实现一个液泵实现多种工作模式,结构巧妙,易于实施。(The invention discloses an electric control type fluid feed spraying device and system, which comprises a liquid pump, a liquid inlet channel and a spraying channel, wherein the liquid inlet channel is communicated with the liquid pump; the device also comprises an electric control valve used for controlling the liquid inlet channel and the spraying channel, wherein the electric control valve is 2 single-channel valves or an electric control three-way valve; the container is connected with the inlet end of the liquid pump, and the outlet end of the liquid pump is connected with the liquid inlet channel and the spraying channel; a container for preparing or storing a fluid feed; the fluid feed spraying equipment based on the electric control single-channel valve further comprises a liquid pump forward and reverse rotation control circuit and a valve control circuit; the valve control circuit is used for controlling the opening and closing of the electric control valve, and ensures that the opening and closing states of the 2 single-channel valves in work are mutually exclusive states, or ensures that at most one channel of the electric control three-way valve can be switched on at each moment. The electronic control type fluid feed spraying equipment and system can realize multiple working modes of one liquid pump by adopting a simple and convenient method, and have the advantages of ingenious structure and easy implementation.)

1. The electric control type fluid feed spraying equipment is characterized by comprising a liquid pump, a liquid inlet channel and a spraying channel; the device also comprises an electric control valve used for controlling the liquid inlet channel and the spraying channel, wherein the electric control valve is 2 single-channel valves or an electric control three-way valve;

the container is connected with the inlet end of the liquid pump, and the outlet end of the liquid pump is connected with the liquid inlet channel and the spraying channel; a container for preparing or storing a fluid feed; the fluid feed spraying equipment also comprises a liquid pump forward and reverse rotation control circuit and a valve control circuit;

when a single-channel valve is adopted: the valve control circuit is used for controlling the opening and closing of the electric control valve and ensuring that the opening and closing states of the 2 single-channel valves in work are mutually exclusive.

When the electric control three-way valve is adopted, the valve control circuit is used for controlling the switching of the electric control three-way valve and ensuring that at most one channel of the electric control three-way valve can be communicated at each moment.

2. The electrically controlled fluid feed spraying apparatus of claim 1, wherein the valve control circuit is an MCU based valve control circuit;

the switching signal input branch is connected with the input end of the MCU, and the output end of the MCU controls the action of the electric control valve through the output branch based on the relay, so that the switching between the liquid inlet channel and the spraying channel is realized.

3. The electric control type fluid feed spraying equipment as claimed in claim 2, wherein the number of the switching signal input branches based on the input switch is N, and N is more than or equal to 1;

when N is 1, the switch signal input branch is correspondingly connected with 1 input end of the MCU;

and when N is larger than 1, the N switching signal input branches are correspondingly connected with the N input ends of the MCU.

4. The electric control type-based fluid feed spraying device according to claim 2, wherein the states of the 2 single-channel valves are controlled to be in a mutual exclusion relationship through a normally open contact and a normally closed contact of one relay, or the states of the 2 single-channel valves are controlled to be in a mutual exclusion relationship through the normally open contacts of the 2 relays;

or the working state of the electric control three-way valve is controlled by the normally open contact and the normally closed contact of one relay, or the working state of the electric control three-way valve is controlled by the normally open contacts of 2 relays.

5. The electric control type fluid feed spraying device according to claim 2, wherein the electric control valve is controlled by a timer in the MCU to be linked with the positive and negative rotation of the liquid pump.

6. The electrically controlled fluid feed spraying device according to claim 2, wherein the output of the MCU is connected to an output branch, and the output branch is provided with a transistor or a power switch.

7. The device for spraying liquid feed based on electric control of claim 1, wherein the opening and closing of the electric control valve is controlled by a relay protection circuit based on a button and a relay.

8. The electronically controlled liquid feed spraying device of claim 7, wherein the relay protection circuit comprises two buttons and 2 relays.

9. The electrically controlled fluid feed spraying apparatus of claim 7, wherein the relay protection circuit further controls the linkage of the electrically controlled valve and the forward and reverse rotation of the liquid pump via a time delay relay.

10. A fluid feed spraying system based on an electric control single-channel valve is characterized by comprising a container and fluid feed spraying equipment connected with the container;

the fluid spraying apparatus is the fluid feed spraying apparatus of any one of claims 1-9.

Technical Field

The invention relates to an electric control type fluid feed spraying device and system.

Background

In the field of aquatic products, some fishes such as spotted silver carps can only eat liquid feed (bait), and the liquid feed needs to be sprayed into ponds.

The traditional way is that the fluid bait is spilt out manually, or put into the bucket of taking the small opening with the fluid bait, during arbitrary fluid bait drips into the pond, these two kinds of modes are original technique, rely on the manpower to carry out instead of relying on electric power, spill the inefficiency of bait, also can't accomplish evenly to spill the material.

Therefore, there is a need for an electrically controlled fluid feed spraying apparatus and system.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an electric control type fluid feed spraying device and system, which are easy to implement, simple in structure and low in cost.

The technical solution of the invention is as follows:

an electric control type fluid feed spraying device comprises a liquid pump, a liquid inlet channel and a spraying channel; the device also comprises an electric control valve used for controlling the liquid inlet channel and the spraying channel, wherein the electric control valve is 2 single-channel valves or an electric control three-way valve; (ii) a

The container is connected with the inlet end of the liquid pump, and the outlet end of the liquid pump is connected with the liquid inlet channel and the spraying channel; a container for preparing or storing a fluid feed; the fluid feed spraying equipment also comprises a liquid pump forward and reverse rotation control circuit and a valve control circuit;

when a single-channel valve is adopted: the valve control circuit is used for controlling the opening and closing of the electric control valve and ensuring that the opening and closing states of the 2 single-channel valves in work are mutually exclusive.

When the electric control three-way valve is adopted, the valve control circuit is used for controlling the switching of the electric control three-way valve and ensuring that at most one channel of the electric control three-way valve can be communicated at each moment.

Mutex means that one valve is open while the other is closed. The electric control valve is also called an electric valve, preferably a valve with two states, is opened when power is on, and is reset and closed when power is off, and the valve is preferably selected in the embodiment. Or 3 control line valves, wherein one line is a common line, 2 lines are powered on to open the valve, and the other 2 lines are powered off to close the valve, and can be controlled by the contact of the relay.

The valve control circuit is based on an MCU (microprogrammed control Unit);

the switching signal input branch is connected with the input end of the MCU, and the output end of the MCU controls the action of the electric control valve through the output branch based on the relay, so that the switching between the liquid inlet channel and the spraying channel is realized. The MCU is a singlechip, a DSP or a PLC, an ARM processor and the like.

The number of switching signal input branches based on the input switch is N, wherein N is more than or equal to 1;

when N is 1, the switch signal input branch is correspondingly connected with 1 input end of the MCU;

and when N is larger than 1, the N switching signal input branches are correspondingly connected with the N input ends of the MCU.

When the switch signal branch is one, the corresponding input switch is a non-reset switch, and the switch is closed or opened at the moment and corresponds to two definite states. For example, the liquid inlet channel is closed and opened, and the corresponding spraying channel is opened, so that the MCU controls the liquid pump to rotate forwards and backwards correspondingly.

When the switch signal branches are multiple, the corresponding input switch can be a button for releasing reset. Thus, one button is opened corresponding to the liquid inlet channel, and the other button is opened corresponding to the spraying channel.

The state of controlling 2 single channel valves through the normally open contact and the normally closed contact of a relay is the mutual exclusion relation, or the state of controlling 2 single channel valves through the normally open contact of 2 relays is the mutual exclusion relation. Or the working state of the electric control three-way valve is controlled by the normally open contact and the normally closed contact of one relay, or the working state of the electric control three-way valve is controlled by the normally open contacts of 2 relays.

The electric control valve and the liquid pump are controlled to be linked in positive and negative rotation through a timer in the MCU, namely the electric control valve starts to act and then is timed, and the motor is controlled to start to rotate in positive and negative rotation after the time is up, and the electric control valve is specifically determined according to the opening in-place time of the electric control valve, and the opening is finished if the electric control valve needs 5-15 s. And the liquid is fed in a reverse direction, and the liquid is sprayed in a forward direction. The specific control is the existing mature technology, and the motor can also be manually controlled to start and rotate forward and backward through a button.

The output end of the MCU is connected with an output branch, and a triode or a power switch is arranged in the output branch. The power switch is a MOS tube and the like.

And a relay protection circuit based on a button and a relay is adopted to control the opening and closing of the electric control valve.

The relay protection circuit includes two buttons and 2 relays.

The relay protection circuit also controls the linkage of the positive and negative rotation starting of the electric control valve and the liquid pump through a delay relay. The specific control is the existing mature technology.

A fluid feed spraying system based on an electric control single-channel valve comprises a container and fluid feed spraying equipment connected with the container;

the fluid water spraying equipment is the fluid feed spraying equipment.

The container is a fermentation tank; other chemical reaction tanks are also possible.

The feed end is connected with a water pipe; other liquid conduits are also possible.

The discharge end is connected with the spray head; or directly output without connecting with a spray head.

A manual proportional valve is arranged on a pipeline between the inlet end of the liquid pump and the fermentation tank.

The liquid pump is provided with a speed regulating device. The speed regulating device is a frequency converter, a thyristor for speed regulation, and the like.

The liquid pump is a direct-flow liquid pump, a three-phase liquid pump or a single-phase liquid pump.

The spray head is a floating spray head. The floating type spray head can float on the water surface of the pond for spraying. Compared with a fixed spray head, the spray head is easier to install and maintain.

The controller for controlling the forward rotation and the reverse rotation of the liquid pump is a change-over switch circuit for changing the wiring of a motor winding or a change-over switch circuit for changing the phase sequence of a three-phase power supply.

Has the advantages that:

the electrically controlled fluid feed spraying equipment and the system have the following characteristics:

(1) the adopted equipment is simple, and various working modes can be executed;

the liquid feeding device mainly comprises a liquid feeding mode and a spraying mode, the adopted devices are a common single-channel electric control valve, a tee joint (or an electric control three-way valve replaces the tee joint and the single-channel electric control valve), a liquid pump and the like, and the implementation cost is low. The switching of various working conditions can be realized by forward and reverse rotation control and the control of a valve. The scheme ingeniously applies the one-way valve to realize two working modes by combining forward rotation and reverse rotation, and compared with other manual valves, the scheme is extremely low in cost, small in quantity during opening and closing and small in quantity of liquid pumps, and is an extremely ingenious scheme.

(2) Can adjust the spraying flow

The spray flow can be regulated by a manual proportional valve. Furthermore, a speed regulating mechanism is arranged on the liquid pump and can also regulate the spraying flow, and the speed regulating mechanism is a frequency converter, a thyristor voltage regulating circuit and the like.

(3) The floating type rotary spray head is more suitable for being applied to water bodies.

In conclusion, the electric control type fluid feed spraying equipment and the system are easy to implement, cost-saving and convenient to operate.

Drawings

FIG. 1 is a schematic diagram of a fluid feed spraying apparatus based on an electrically operated single-channel valve (water feed mode);

FIG. 2 is a schematic diagram of the construction of an electrically operated single-channel valve-based fluid feed spraying apparatus (spray mode);

FIG. 3 is a control circuit diagram based on an MCU;

FIG. 4 is a control circuit diagram based on a relay protection circuit (two relays control two valves);

FIG. 5 is a control circuit diagram based on a relay protection circuit (one relay controls two valves);

FIG. 6 is a wiring diagram of the single-phase motor in forward rotation;

FIG. 7 is a reverse wiring diagram of a single-phase motor;

FIG. 8 is a reverse wiring diagram of a three-phase motor;

FIG. 9 is a schematic view of a fluid feed spraying apparatus based on an electrically controlled three-way valve (water feed mode);

fig. 10 is a schematic view of the structure of a fluid feed spraying device based on an electrically controlled three-way valve (spraying mode);

FIG. 11 is a control circuit diagram based on an MCU;

FIG. 12 is a diagram of a relay protection circuit based control circuit;

fig. 13 is a schematic view of the overall structure.

Detailed Description

The invention will be described in further detail below with reference to the following figures and specific examples:

referring to fig. 1-2, an electrically controlled single-channel valve-based fluid feed spraying device comprises a liquid pump, a liquid inlet channel and a spraying channel; the device also comprises an electric control valve used for controlling the liquid inlet channel and the spraying channel, wherein the electric control valve is 2 single-channel valves;

the container is connected with the inlet end of the liquid pump, and the outlet end of the liquid pump is connected with the liquid inlet channel and the spraying channel; a container for preparing or storing a fluid feed;

the fluid feed spraying equipment based on the electric control single-channel valve further comprises a liquid pump forward and reverse rotation control circuit and a valve control circuit; the valve control circuit is used for controlling the opening and closing of the electric control valve and ensuring that the opening and closing states of the 2 single-channel valves are mutually exclusive when in work; mutex means that one valve is open while the other is closed. The electric control valve is also called an electric valve, preferably a valve with two states, is opened when power is on, and is reset and closed when power is off, and the valve is preferably selected in the embodiment. Or 3 control line valves, wherein one line is a common line, 2 lines are powered on to open the valve, and the other 2 lines are powered off to close the valve, and can be controlled by the contact of the relay.

Example 1: as shown in fig. 3, the valve control circuit is a MCU-based valve control circuit;

the switching signal input branch is connected with the input end of the MCU, and the output end of the MCU controls the action of the electric control valve through the output branch based on the relay, so that the switching between the liquid inlet channel and the spraying channel is realized. The MCU is a singlechip, a DSP or a PLC, an ARM processor and the like.

The number of the switching signal input branches based on the input switches is 2, and the 2 switching signal input branches are correspondingly connected with 2 input ends (namely in01 and in02) of the MCU.

The corresponding input switches SB1 and SB2 may be buttons that release the reset. Thus, one button is opened corresponding to the liquid inlet channel, and the other button is opened corresponding to the spraying channel.

The state of 2 single channel valves of normally open contact and normally closed contact control through a relay is the mutual exclusion relation (or the state of 2 single channel valves of normally open contact control through 2 relays is the mutual exclusion relation, and this kind of substitution adopts two relays, also can realize, for current mature technique.)

The electric control valve and the liquid pump are controlled to be linked in positive and negative rotation through a timer in the MCU, namely the electric control valve starts to act and then is timed, and the motor is controlled to start to rotate in positive and negative rotation after the time is up, and the electric control valve is specifically determined according to the opening in-place time of the electric control valve, and the opening is finished if the electric control valve needs 5-15 s. And the liquid is fed in a reverse direction, and the liquid is sprayed in a forward direction. The specific control is the existing mature technology, and the motor can also be manually controlled to start and rotate forward and backward through a button.

The output end of the MCU is connected with an output branch, and a triode or a power switch is arranged in the output branch. The power switch is a MOS tube and the like.

Description of the control process:

(1) when the SB1 is pressed down, the MCU detects the level jump of the IN01 port, the triode Q1 is controlled to be conducted, the relay J is electrified, the K1 is electrified to be opened, and the other circuit controls the motor to reversely rotate and a water inlet mode; SB1 springs back to the original state after being pressed, and the subsequent state is not influenced.

(2) When the SB2 is pressed down, the MCU detects the level jump of the IN02 port, the triode Q1 is controlled to be cut off, the relay J loses power, the J-1 is disconnected, the K1 loses power and is closed, the K2 is powered on and is opened, and the other circuit controls the motor to rotate forwards and spray the mode; SB2 springs back to the original state after being pressed, and the subsequent state is not influenced.

Example 2:

referring to fig. 4 and 5, a relay protection circuit based on a button and a relay is adopted to control the opening and closing of the electric control valve.

The relay protection circuit includes two buttons (SB1 and SB2) and 2 relays (J1 and J2).

Fig. 4 illustrates the working process:

(1) when the SB1 is pressed down, the relay J1 is powered on, the J1-1 is closed and self-locked, in addition, the J1-3 is closed, the K1 acts, the normally closed switch J1-2 acts, and the J2 is powered off; the other circuit controls the motor to rotate reversely and the water inlet mode; SB1 springs back to the original state after being pressed, and the subsequent state is not influenced.

(2) When the SB2 is pressed down, the relay J2 is powered on, the J2-1 is closed and self-locked, in addition, the J2-3 is closed, the K2 acts, the normally closed switch J2-2 acts, and the J1 is powered off; the other circuit controls the motor to rotate forward and spray; SB2 springs back to the original state after being pressed, and the subsequent state is not influenced.

Fig. 5 illustrates the working process:

(1) when the SB1 is pressed down, the relay J1 is powered on, the J1-1 is closed and self-locked, in addition, the J1-3 is closed, the K1 acts (and the normally closed switch J1-2 acts), and the J2 is powered off; the other circuit controls the motor to rotate reversely and the water inlet mode; j1-4 is open and K2 is closed. SB1 springs back to the original state after being pressed, and the subsequent state is not influenced.

(2) SB2 is pressed down, the relay J2 is electrified, the relay J2-1 is closed and self-locked, in addition, the relay J2-2 is disconnected, the relay K1 is electrified, the normally closed switch J2-2 is closed, the relay K2 is opened, and the other circuit controls the motor to rotate forwards and to spray; SB2 springs back to the original state after being pressed, and the subsequent state is not influenced.

The relay protection circuit also controls the linkage of the positive and negative rotation starting of the electric control valve and the liquid pump through a delay relay. The specific control is the existing mature technology. See also

A fluid feed spraying system based on an electric control single-channel valve comprises a container and fluid feed spraying equipment connected with the container;

in addition, it should be noted that:

the fluid water spraying equipment is the fluid feed spraying equipment.

The container is a fermentation tank; other chemical reaction tanks are also possible.

The feed end is connected with a water pipe; other liquid conduits are also possible.

The discharge end is connected with the spray head; or directly output without connecting with a spray head.

A manual proportional valve is arranged on a pipeline between the inlet end of the liquid pump and the fermentation tank.

The liquid pump is provided with a speed regulating device. The speed regulating device is a frequency converter, a thyristor for speed regulation, and the like.

The liquid pump is a direct-flow liquid pump, a three-phase liquid pump or a single-phase liquid pump.

The spray head is a floating spray head. The floating type spray head can float on the water surface of the pond for spraying. Compared with a fixed spray head, the spray head is easier to install and maintain.

The controller for controlling the forward rotation and the reverse rotation of the liquid pump is a change-over switch circuit for changing the wiring of a motor winding or a change-over switch circuit for changing the phase sequence of a three-phase power supply, specifically, the forward rotation and the reverse rotation of a single-phase motor (such as an YL90L1-4 type motor) are shown in fig. 6-7, the forward rotation and the reverse rotation can be realized by adopting a double-pole double-throw switch (or a relay circuit for realizing the switching is also the prior mature technology), the forward rotation and the reverse rotation of the three-phase motor can be realized by only changing two circuits, and a circuit diagram realized by adopting a relay is shown in fig. 8.

Referring to fig. 9-10, a liquid feed spraying apparatus based on an electrically controlled three-way valve comprises a liquid pump and an electrically controlled three-way valve K3 for controlling a liquid inlet passage and a spraying passage;

the container is connected with the inlet end of the liquid pump, the outlet end of the liquid pump is connected with the first port of the electric control three-way valve, the second port of the electric control three-way valve is connected with the water inlet pipe, and the third port of the electric control three-way valve is connected with the liquid spraying pipe;

the liquid inlet channel is a channel for pumping a water inlet pipe to a container through an electric control three-way valve and a liquid pump;

the spraying channel is a channel from the container to the liquid spraying pipe through the liquid pump and the electric control three-way valve;

a container for preparing or storing a fluid feed;

the fluid feed spraying equipment based on the electric control three-way valve also comprises a liquid pump forward and reverse rotation control circuit and a valve control circuit; the valve control circuit is used for controlling the switching of the electric control three-way valve and ensuring that at most one channel of the electric control three-way valve can be conducted at each moment (either 2 channels are closed or only one channel is conducted, and two channels which are a liquid inlet channel and a spraying channel cannot be conducted); the three-way valve has various modes, the three-way valve has three channels which can be independently controlled, the control valve is used for controlling two channels, if power is supplied, the first channel is conducted, the second channel is closed, and if power is lost, the first channel is closed, the second channel is conducted, and the valve is preferably selected in the embodiment. The control can be realized through the contact of the relay, and the specific control method is the prior art.

The switching signal input branch is connected with the input end of the MCU, and the output end of the MCU controls the action of the electric control valve through the output branch based on the relay, so that the switching between the liquid inlet channel and the spraying channel is realized. The MCU is a singlechip, a DSP or a PLC, an ARM processor and the like.

The number of switching signal input branches based on the input switch is N, wherein N is more than or equal to 1;

when N is 1, the switch signal input branch is correspondingly connected with 1 input end of the MCU;

and when N is larger than 1, the N switching signal input branches are correspondingly connected with the N input ends of the MCU.

When the switch signal branch is one, the corresponding input switch is a non-reset switch, and the switch is closed or opened at the moment and corresponds to two definite states. For example, the liquid inlet channel is closed and opened, and the corresponding spraying channel is opened, so that the MCU controls the liquid pump to rotate forwards and backwards correspondingly.

When the switch signal branches are multiple, the corresponding input switch can be a button for releasing reset. Thus, one button is opened corresponding to the liquid inlet channel, and the other button is opened corresponding to the spraying channel.

The working state of the electric control three-way valve is controlled by the normally open contact and the normally closed contact of one relay, or the working state of the electric control three-way valve is controlled by the normally open contacts of 2 relays.

The electric control valve and the liquid pump are controlled to be linked in positive and negative rotation through a timer in the MCU, namely the electric control valve starts to act and then firstly counts time, and then the motor is controlled to start to rotate in positive and negative rotation after the time is up (the time is determined according to the opening in-place time of the electric control valve, if the invention needs 5-15s, the opening is finished, and the liquid is fed in the reverse rotation and the spraying is carried out in the positive and negative rotation.

The output end of the MCU is connected with an output branch, and a triode or a power switch is arranged in the output branch. The power switch is a MOS tube and the like.

And a relay protection circuit based on a button and a relay is adopted to control the working state of the electric control valve.

The relay protection circuit includes two buttons and 2 relays.

The relay protection circuit also controls the linkage of the positive and negative rotation starting of the electric control valve and the liquid pump through a delay relay.

The specific control is the existing mature technology.

A fluid feed spraying system based on an electric control three-way valve comprises a container and fluid feed spraying equipment connected with the container;

the fluid water spraying equipment is the fluid feed spraying equipment.

Example 3: as shown in fig. 11, the valve control circuit is a MCU-based valve control circuit;

the switching signal input branch is connected with the input end of the MCU, and the output end of the MCU controls the action of the electric control valve through the output branch based on the relay, so that the switching between the liquid inlet channel and the spraying channel is realized. The MCU is a singlechip, a DSP or a PLC, an ARM processor and the like.

The number of the switching signal input branches based on the input switches is 2, and the 2 switching signal input branches are correspondingly connected with 2 input ends (namely in01 and in02) of the MCU.

The corresponding input switches SB1 and SB2 may be buttons that release the reset. Thus, one button is opened corresponding to the liquid inlet channel, and the other button is opened corresponding to the spraying channel.

The state of the electric control three-way valve is controlled by a normally open contact and a normally closed contact of a relay.

The electric control valve and the liquid pump are controlled to be linked in positive and negative rotation through a timer in the MCU, namely the electric control valve starts to act and then is timed, and the motor is controlled to start to rotate in positive and negative rotation after the time is up, and the electric control valve is specifically determined according to the opening in-place time of the electric control valve, and the opening is finished if the electric control valve needs 5-15 s. And the liquid is fed in a reverse direction, and the liquid is sprayed in a forward direction. The specific control is the existing mature technology, and the motor can also be manually controlled to start and rotate forward and backward through a button.

The output end of the MCU is connected with an output branch, and a triode or a power switch is arranged in the output branch. The power switch is a MOS tube and the like.

Description of the control process:

(1) when the SB1 is pressed down, the MCU detects the level jump of the IN01 port, the triode Q1 is controlled to be conducted, the relay J is electrified, the first port and the second port of the K3 are conducted, the other circuit controls the motor to reversely rotate, the water inlet channel is connected, and the water inlet mode is started; SB1 springs back to the original state after being pressed, and the subsequent state is not influenced.

(2) When the SB2 is pressed down, the MCU detects the level jump of the IN02 port, the triode Q1 is controlled to be cut off, the relay J loses power, the first port and the third port of the K3 are switched on, and the other circuit controls the motor to rotate forwards and spray; SB2 springs back to the original state after being pressed, and the subsequent state is not influenced.

Example 4:

referring to fig. 12, a relay protection circuit based on buttons and relays is used to control the opening and closing of the electrically controlled valve.

The relay protection circuit includes two buttons (SB1 and SB2) and 2 relays (J1 and J2).

Fig. 4 illustrates the working process:

(1) when the SB1 is pressed down, the relay J1 is electrified, the J1-1 is closed and self-locked, the J1-3 is closed, the K3 acts, the first port and the second port of the K3 are conducted, the other circuit controls the motor to rotate reversely, the water inlet channel is connected, and the water inlet mode is started; SB1 springs back to the original state after being pressed, and the subsequent state is not influenced.

(2) When the SB2 is pressed down, the relay J2 is powered on, the J2-1 is closed and self-locked, in addition, the J2-3 is disconnected, the K3 is powered off, and the first port and the third port of the K3 are connected; the other circuit controls the motor to rotate forward to enter an injection mode; SB2 springs back to the original state after being pressed, and the subsequent state is not influenced.

The relay protection circuit also controls the linkage of the positive and negative rotation starting of the electric control valve and the liquid pump through a delay relay. The specific control is the existing mature technology.