CN215293803U - Control circuit of electric control valve and electric control valve - Google Patents

Abstract

The control circuit comprises a control module, a power module, a voltage follower and a sensor module, wherein the power module is respectively connected with the control module and the voltage follower; the control module acquires the state of the electric control valve, if the state of the electric control valve is a dormant state, the control module sends a first signal to the voltage follower, the voltage follower stops supplying power to the sensor module, the voltage follower enters the dormant state, if the state of the electric control valve is a working state, the control module sends a second signal to the voltage follower, the voltage follower enters the working state, the voltage follower supplies power to the sensor module, the state of the electric control valve is judged, the state of the voltage follower is controlled, the current consumption of the voltage follower and the sensor module is reduced, and the power consumption of the electric control valve in the dormant state is reduced.

Description

Control circuit of electric control valve and electric control valve

Technical Field

The utility model relates to an air conditioner field especially relates to control circuit and automatically controlled valve of automatically controlled valve.

Background

An air conditioning system includes a compressor, an evaporator, a condenser, and a throttling element, and in order to improve the flow control accuracy of a working medium, an electrically controlled valve is generally used as the throttling element. The control of the electric control valve is realized by acquiring parameters of the sensor module and performing corresponding control through the acquired parameters, and in the related art, the electric control valve also needs to supply power to the sensor module in a working state or a dormant state, so that current consumption is caused.

How to reduce the current consumption of the electric control valve in the dormant state is a technical problem to be improved.

SUMMERY OF THE UTILITY MODEL

The application provides a control circuit of an electric control valve and the electric control valve, which are used for reducing current consumption of the electric control valve in a dormant state.

In order to realize the purpose, the following technical scheme is adopted:

a control circuit is used for controlling an electric control valve and comprises a control module, a power supply module, a voltage follower and a sensor module, wherein the voltage follower comprises an operational amplifier, an internal power supply and a first switch tube, the internal power supply is respectively connected with the first switch tube and the operational amplifier, the operational amplifier is connected with the first switch tube, the power supply module is respectively connected with the control module and the voltage follower, the control module is respectively connected with the voltage follower and the sensor module, and the sensor module is connected with the voltage follower, wherein the voltage follower module is used for supplying power to the sensor module;

the control module acquires the state of the electric control valve, if the state of the electric control valve is a dormant state, the control module sends a first signal to the voltage follower, the voltage follower enters the dormant state, the voltage follower stops supplying power to the sensor module, if the state of the electric control valve is a working state, the control module sends a second signal to the voltage follower, the voltage follower enters the working state, and the voltage follower supplies power to the sensor module.

An electric control valve comprises a stator assembly, a rotor assembly, a valve core and a circuit board, wherein the stator assembly comprises a coil, the rotor assembly comprises a permanent magnet, the coil is electrically connected with the circuit board, the rotor assembly is in transmission connection with the valve core, an excitation magnetic field is generated after the coil is electrified, the rotor assembly rotates under the action of the excitation magnetic field to drive the valve core to move, and the circuit board is integrated with a control circuit of the electric control valve. The control circuit comprises a control module, a power supply module, a voltage follower and a sensor module, wherein the voltage follower comprises an operational amplifier, an internal power supply and a first switching tube, the internal power supply is respectively connected with the first switching tube and the operational amplifier, the operational amplifier is connected with the first switching tube, the power supply module is respectively connected with the control module and the voltage follower, and the control module is respectively connected with the voltage follower and the sensor module; the control module acquires the state of the electric control valve, if the state of the electric control valve is a dormant state, the control module sends a first signal to the voltage follower, the voltage follower enters the dormant state, the voltage follower stops supplying power to the sensor module, if the state of the electric control valve is a working state, the control module sends a second signal to the voltage follower, the voltage follower enters the working state, the voltage follower supplies power to the sensor module, the state of the electric control valve is judged, the voltage follower is controlled, when the voltage follower enters the dormant state, the sensor module in the electric control valve is not supplied power, the current consumption of the voltage follower and the sensor module is reduced, and the power consumption of the electric control valve in the dormant state is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of a control circuit of an electrically controlled valve according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a voltage follower according to an embodiment of the present application;

FIG. 3 is a schematic diagram of one possible configuration of a voltage follower module according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a power module according to an embodiment of the present application;

fig. 5 is a schematic circuit diagram of a specific circuit structure of the power module according to the embodiment of the present application;

fig. 6 is a schematic structural diagram of a control circuit of another electrically controlled valve according to an embodiment of the present application;

fig. 7 is a schematic diagram of a possible structure of a hall sensor module according to an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.

Fig. 1 is a schematic structural diagram of a control circuit of an electric control valve according to an embodiment of the present disclosure, and the control circuit may be applied to control of an electric control valve, such as an electronic expansion valve, a water valve, a ball valve, and the like. As shown in fig. 1 and 2, the control circuit includes a control module 12, a power module 11, a voltage follower U4 and a sensor module 14, the voltage follower U4 includes an operational amplifier AMP, an internal power supply PREREG, and a first switching tube, the internal power supply PREREG is connected to the first switching tube and the operational amplifier AMP, the operational amplifier AMP is connected to the first switching tube, the power module 11 is connected to the control module 12 and the voltage follower U4, the control module 12 is connected to the voltage follower U4 and the sensor module 14, and the sensor module 14 is connected to the voltage follower U4, wherein the voltage follower U4 is used for supplying power to the sensor module 14;

control module 12 obtains the state of electric control valve, if the state of electric control valve is the dormant state, then control module 12 sends first signal to voltage follower 13, voltage follower 13 enters the dormant state, voltage follower 13 stops to supply power for sensor module 14, if the state of electric control valve is operating condition, then control module 12 sends the second signal to voltage follower 13, voltage follower 13 enters the operating condition, voltage follower 13 supplies power for sensor module 14, in this embodiment, through judging the state of electric control valve, and then control the state of voltage follower 13, when voltage follower 13 enters the dormant state, no longer supply power for sensor module 14, the current consumption under the electric control valve dormant state has been reduced.

In some embodiments, fig. 2 is a schematic structural diagram of a voltage follower according to an embodiment of the present application, and as shown in fig. 2, the voltage follower U4 includes an operational amplifier AMP, an internal power supply PREREG, an overheat protection module TSD, an overcurrent protection module OCP, and a first switching tube, the voltage follower U4 has a first Pin 1Pin, a second Pin 2Pin, a third Pin 3Pin, a fourth Pin 4Pin, and a fifth Pin 5Pin, a source of the first switching tube is respectively connected to a first end of the internal power supply PREREG, a first end of the overcurrent protection module OCP, a third Pin of the voltage follower U4, and a positive electrode of the operational amplifier AMP, a drain of the first switching tube is respectively connected to a second end of the overcurrent protection module OCP, a second end of the overheat protection module TSD, and an output end of the operational amplifier, a gate of the first switching tube is respectively connected to a non-phase end of the operational amplifier AMP and a fourth Pin of the voltage follower U4, the inverting end of the operational amplifier AMP is connected with a first pin of a voltage follower U4; the second end of the internal power supply PREREG is connected with the first end of the overheating protection module TSD, and the third end of the internal power supply PREREG, the third end of the overheating protection module TSD, the third end of the overcurrent protection module OCP, the negative electrode of the operational amplifier AMP, the second pin of the voltage follower U4 and the fifth pin of the voltage follower U4 are all grounded.

The internal power supply PREREG is used for supplying power to the overheating protection module TSD, the overcurrent protection module OCP, the first switching tube, the operational amplifier AMP and the sensor module 14, and the overcurrent protection module OCP and the overheating protection module TSD are disconnected when the voltage follower U4 circuit is overcurrent or overheated; in the event that operation of the control module 12 is desired and operation of the sensor module 14 is not desired, the control module 12 sends a first signal to the first pin of the voltage follower U4, the voltage follower U4 enters a sleep state, the voltage follower U4 stops supplying power to the sensor module 14, current consumption of the voltage follower U4 and the sensor module 14 is reduced, power consumption of the control circuit is reduced, and voltage follower U4 is from taking the steady voltage function, the input voltage of voltage follower U4 can directly get battery voltage, the output voltage of voltage follower U4 is complete unanimous with the input voltage, there is not the pressure differential, various sensors can all be suitable for, use voltage follower to replace low-dropout linear regulator (LDO) and supply power for sensor module 14, the current consumption under the automatically controlled valve dormancy state has been guaranteed to reduce cost simultaneously, can reduce to meeting the less than 0.125mA that the customer demand was met by the mA level through inventor's experiment. It is understood that fig. 2 is a possible connection circuit of the voltage follower, and the voltage follower of the present application is not limited to the implementation shown in fig. 2.

In some embodiments, the control circuit further includes a voltage follower module, fig. 3 is a schematic diagram of a possible structure of the voltage follower module according to an embodiment of the present application, and as shown in fig. 3, the voltage follower module includes a voltage follower U4, a twenty-fourth capacitor C24, and a thirtieth capacitor C30;

a first pin of the voltage follower U4 is connected with an output port VC5 of the control module 12, a third pin of the voltage follower U4 is connected with a POWER supply and a first end of a twenty-fourth capacitor C24, a fourth pin of the voltage follower U4 is connected with a first end of a thirty-third capacitor C30 and the hall sensor module 41, a second pin of the voltage follower U4, a fifth pin of the voltage follower U4, a second end of the twenty-fourth capacitor C24 and a second section of the thirty-third capacitor C30 are all grounded, when the electronic control valve is in a sleep state, the control module 12 sends a first signal to the voltage follower U4 through the output port VC5, the voltage follower U4 enters a sleep state, the fourth pin of the voltage follower U4 does not supply POWER to the hall sensor module 41 any more, current consumption when the electronic control valve is in the sleep state is reduced, when the control module 12 sends a second signal to the voltage follower U4 through the output port VC5, the voltage follower U4 enters the operating state, makes the automatically controlled valve can normally work, and the twenty-fourth electric capacity C24 is used for filtering the input voltage, and the thirtieth electric capacity C30 is used for filtering the output voltage.

In some embodiments, fig. 4 is a schematic structural diagram of a power supply module according to an embodiment of the present application, as shown in fig. 4, the power supply module 11 includes an overvoltage protection module 110, an anti-reverse module 111, and a filtering module 112, the overvoltage protection module 110 is connected to the anti-reverse module 111, and the anti-reverse module 111 is connected to the filtering module 112, where the overvoltage protection module 110 is used for overvoltage protection, the anti-reverse module 111 is used for preventing a positive electrode and a negative electrode of a power supply from being reverse connected to each other, and the filtering module 112 is used for filtering out a specific band frequency in a signal, and suppressing and preventing interference.

Fig. 5 is a schematic diagram of a specific circuit structure of a power supply module according to an embodiment of the present invention, as shown in fig. 5, the overvoltage protection module 110 includes a bidirectional transient suppression diode (bidirectional TVS) D2, the anti-reverse module 111 includes a PMOS transistor Q1, a second resistor R2, and a voltage regulator D1, and the filtering module 112 includes a second capacitor C2, a seventh inductor L7, a fourth capacitor C4, a fifth capacitor C5, and a seventh capacitor C7.

A first pin of the interface CN1 is connected to a negative electrode of a POWER supply, a third pin of the interface CN1 is connected to a positive electrode VBAT of the POWER supply, a second pin of the interface CN1 is connected to the communication port LIN _ IN of the control module 12, a first end of the bidirectional TVS tube D2 is connected to the positive electrode VBAT of the POWER supply and a drain of the PMOS tube Q1, a gate of the PMOS tube Q1 is connected to a first end of the second resistor R2 and a positive electrode of the regulator tube D1, a source of the PMOS tube Q1 is connected to a negative electrode of the regulator tube D1, a first end of the second capacitor C2 and a first end of the seventh inductor L7, a second end of the seventh inductor L7 is connected to a first end of the fourth capacitor C4, a first end of the fifth capacitor C5, a first end of the seventh capacitor C8, a POWER port of the control module 12 and a third pin (powerr port) of the voltage follower module 13, a negative electrode of the POWER supply, a second end of the bidirectional TVS tube D6, a second end of the second resistor R2, a second end of the fourth capacitor C2, a second end of the voltage follower module 13, a second end of the fourth capacitor C2 and a second end of the second capacitor C2, The second end of the fifth capacitor C5 and the second end of the seventh capacitor C7 are both grounded, when the electric valve works, the power module 11 is used for supplying power to the control module 12 and the voltage follower module 13, the power module 11 supplies power to the hall sensor module 41 through the voltage follower module 13, and the power module 11 can be an external power supply or an internal electric control valve.

When the POWER supply is connected positively, the POWER supply flows in from a third pin of the interface CN1, and flows through the overvoltage protection module, then passes through a parasitic diode of the anti-reverse PMOS tube Q1, the voltage regulator tube D1 is subjected to reverse breakdown, so that the voltage at two ends of the voltage regulator tube D1 is stabilized at a certain value, the gate voltage Vg of the PMOS tube Q1 is smaller than the source voltage Vs, the PMOS tube is conducted, at the moment, the POWER supply flows through the CLC filter circuit, the filter capacitor C5 and the filter capacitor C7 to filter high-frequency components, so that a POWER supply POWER is obtained, the POWER supply POWER is used for supplying POWER to the control module 12 and the voltage follower module 13, when the POWER supply is connected reversely, the POWER supply enters from the port GND, the gate voltage Vg of the PMOS tube Q1 is larger than the source voltage Vs, and the PMOS tube Q1 is cut off, so that components and devices are prevented from being damaged when the POWER supply is connected reversely; VGS is the maximum grid-source voltage of PMOS pipe Q1, namely the maximum voltage which can be applied between two grid-source electrodes, if Vgs is larger than VGS, the voltage is too high to cause damage of a grid oxide layer, and the PMOS pipe Q1 is damaged, a voltage regulator pipe D1 can keep the Vgs within a certain value, prevent the Vgs from being larger than VGS to damage the grid oxide layer, and improve the reliability of the circuit; the bidirectional TVS tube is used for absorbing surge power and bearing reverse voltage impact in a very short time, so that a voltage clamp between two electrodes is positioned at a specific voltage, the impact on a rear circuit is avoided, and the bidirectional TVS tube is used for overvoltage protection; a Bulk current injection method (BCI for short) belongs to EMC tests, and is an electromagnetic radiation immunity limiting value and a measuring method of an electronic and electrical component of a motor vehicle.

In some embodiments, fig. 6 is a schematic structural diagram of a control circuit of another electrically controlled valve according to an embodiment of the present application, as shown in fig. 6, the sensor module 14 includes a hall sensor module 41, the hall sensor module 41 is connected to the control module 12, the hall sensor module 41 is connected to the output terminal of the voltage follower module 13 through a magnetic bead B3, in this embodiment, the magnetic bead B3 is used to suppress high-frequency noise and spike interference on the signal line and the power line, and also has the ability to absorb electrostatic pulses, the output terminal of the voltage follower module 13 is used to provide voltage for the hall sensor module 41, a magnetic bead B3 is added between the output terminals of the hall sensor module 41 and the voltage follower module 13, the tolerance of the electric control valve to RS (radio frequency electromagnetic field radiation immunity test) can be improved, and the immunity of the radar wave band of the product can be improved from 150V/M to 600V/M through the inventor experiment. Of course, the sensor module 14 is not limited to the hall sensor module, and may be a PT sensor module or the like.

Fig. 7 is a schematic diagram of a possible structure of a hall sensor module according to an embodiment of the present disclosure, and as shown in fig. 7, the hall sensor module 41 includes a hall sensor U2, a magnetic bead B3, a sixteenth resistor R16, and a seventeenth resistor R17, where the hall sensor is an MLX 92211-BU;

the first pin of the HALL sensor U2 is grounded, the second pin of the HALL sensor U2 is connected with the first end of the magnetic bead B3, the second end of the magnetic bead B3 is connected with the output terminal VCC5 of the voltage follower module 13, the third pin of the HALL sensor U2 is connected with the first end of the sixteenth resistor R16, the second end of the sixteenth resistor R16 is connected with the first ends of the acquisition port HALL of the control module 12 and the seventeenth resistor R17, the second end of the seventeenth resistor R17 is grounded, the output terminal VCC5 of the voltage follower module 13 supplies power to the HALL sensor U2 through the magnetic bead B3, the magnetic bead B3 is added on the power supply part of the Hall sensor to improve the impedance, improve the tolerance of the product to RS, the anti-interference capability of the radar wave frequency band of the product is improved to 600V/M from 150V/M, the sixteenth resistor R16 and the seventeenth resistor R17 are used for voltage division, and the acquisition port HALL of the control module 12 controls the electric control valve according to the acquired voltage signals.

In some embodiments, the control circuit further comprises a bypass grounding module, the bypass grounding module is respectively connected with the shell of the electric control valve and the ground through a lead, the bypass grounding module provides a low-impedance path for releasing electrostatic energy, so that the antistatic capability of the electric control valve is greatly improved, and the electric control valve can be lifted from 8KV reset to 20KV reset without error report through inventor experiments.

In some embodiments, the control module 12 includes an HVC4223F chip, the HVC4223F chip is a high-integration SBC chip for controlling a stepping motor for a vehicle, the HVC4223F chip includes a communication module, a motor driving module and a micro-control Unit, the micro-control Unit is respectively connected with the communication module and the motor driving module, wherein the HVC4223F chip internally integrates modules such as a serial interconnection Network (LIN), a micro-control Unit (MCU) and a stepping motor driver, the LIN is used to communicate with an automobile ECU, the ECU receives an ECU instruction, and the MCU completes operations such as motor driving and lock detection according to the instruction, after the HVC42 4223F chip is used, the control circuit does not need a single-chip microcomputer, a driving chip, a communication chip and peripheral electronic devices, and reduces the volume of a Printed Circuit Board (PCBA) while reducing cost.

The embodiment also provides an electric control valve, including stator module, rotor subassembly, case and circuit board, stator module includes the coil, and the rotor subassembly includes the permanent magnet, and stator module is located the inner periphery or the periphery of rotor subassembly, and the coil is connected with the circuit board electricity, and the rotor subassembly is connected with the case transmission, produces the excitation magnetic field after the coil circular telegram, and the rotor subassembly rotates under the excitation magnetic field effect and drives the case motion, the circuit board integration above technical scheme the control circuit of electric control valve. The electric control valve further comprises a shell, the stator assembly, the rotor assembly, the valve core and the circuit board are located in the shell, and the bypass grounding module is respectively connected with the shell of the electric control valve and grounded through conducting wires.

It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A control circuit is used for controlling an electric control valve and is characterized by comprising a control module, a power supply module, a voltage follower and a sensor module, wherein the voltage follower comprises an operational amplifier, an internal power supply and a first switch tube, the internal power supply is respectively connected with the first switch tube and the operational amplifier, the operational amplifier is connected with the first switch tube, the power supply module is respectively connected with the control module and the voltage follower, the control module is respectively connected with the voltage follower and the sensor module, and the sensor module is connected with the voltage follower, wherein the voltage follower is used for supplying power to the sensor module;

the control module acquires the state of the electric control valve, and if the state of the electric control valve is a dormant state, the control module sends a first signal to the voltage follower, the voltage follower enters the dormant state, and the voltage follower stops supplying power to the sensor module; and if the state of the electric control valve is a working state, the control module sends a second signal to the voltage follower, the voltage follower enters the working state, and the voltage follower supplies power to the sensor module.

2. The control circuit of claim 1, wherein the voltage follower further comprises an over-temperature protection module and an over-current protection module, the voltage follower is provided with a first pin, a second pin, a third pin, a fourth pin and a fifth pin, the source electrode of the first switch tube is respectively connected with the first end of the internal power supply, the first end of the overcurrent protection module, the third pin of the voltage follower and the anode of the operational amplifier, the drain electrode of the first switch tube is respectively connected with the second end of the overcurrent protection module, the second end of the overheat protection module and the output end of the operational amplifier, the grid electrode of the first switching tube is respectively connected with the in-phase end of the operational amplifier and the fourth pin of the voltage follower, and the inverting end of the operational amplifier is connected with the first pin of the voltage follower;

the second end of the internal power supply is connected with the first end of the overheating protection module, and the third end of the internal power supply, the third end of the overheating protection module, the third end of the overcurrent protection module, the negative electrode of the operational amplifier, the second pin of the voltage follower and the fifth pin of the voltage follower are all grounded.

3. The control circuit of claim 2, further comprising a voltage follower module comprising the voltage follower, a twenty-fourth capacitance, and a thirty-fourth capacitance;

a first pin of the voltage follower is connected with the control module, a third pin of the voltage follower is respectively connected with the power module and a first end of the twenty-fourth capacitor, a fourth pin of the voltage follower is respectively connected with a first end of the thirtieth capacitor and the Hall sensor module, and a second pin of the voltage follower, a fifth pin of the voltage follower, a second end of the twenty-fourth capacitor and a second section of the thirtieth capacitor are all grounded; when the electric control valve is in dormancy, the control module sends a first signal to the voltage follower through the output port, the voltage follower enters a dormant state, the fourth pin of the voltage follower does not supply power to the Hall sensor module any more, when the electric control valve works, the control module sends a second signal to the voltage follower through the output port, and the voltage follower enters a working state.

4. The control circuit of claim 3, wherein the sensor module comprises a Hall sensor module, the Hall sensor module is connected with the control module, and the Hall sensor module is connected with the output end of the voltage follower module through a magnetic bead.

5. The control circuit of claim 4, wherein the Hall sensor module comprises a Hall sensor, a magnetic bead, a sixteenth resistor, and a seventeenth resistor;

the first pin of the Hall sensor is grounded, the second pin of the Hall sensor is connected with the first end of the magnetic bead, the second end of the magnetic bead is connected with the output end of the voltage follower module, the third pin of the Hall sensor is connected with the first end of the sixteenth resistor, the second end of the sixteenth resistor is connected with the control module and the first end of the seventeenth resistor respectively, and the second end of the seventeenth resistor is grounded.

6. The control circuit according to claim 3, wherein the power supply module comprises an overvoltage protection module, an anti-reversion module and a filtering module, the overvoltage protection module is connected with the anti-reversion module, and the anti-reversion module is connected with the filtering module.

7. The control circuit according to claim 6, wherein the overvoltage protection module comprises a bidirectional transient suppression diode, the anti-reverse module comprises a switch tube, a second resistor and a voltage regulator tube, and the filtering module comprises a second capacitor, a seventh inductor, a fourth capacitor, a fifth capacitor and a seventh capacitor;

the first end of the bidirectional transient suppression diode is connected with the positive electrode of a power supply and the drain electrode of the switch tube, the grid electrode of the switch tube is connected with the first end of the second resistor and the positive electrode of the voltage regulator tube, the source electrode of the switch tube is connected with the negative electrode of the voltage regulator tube, the first end of the second capacitor and the first end of the seventh inductor, the second end of the seventh inductor is connected with the first end of the fourth capacitor, the first end of the fifth capacitor, the first end of the seventh capacitor, the control module and the voltage follower module, and the negative electrode of the power supply, the second end of the bidirectional transient suppression diode, the second end of the second resistor, the second end of the second capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor and the second end of the seventh capacitor are all grounded.

8. The control circuit according to any one of claims 1 to 7, further comprising a bypass grounding module, wherein the bypass grounding module is respectively connected with the housing of the electric control valve and the ground through a lead.

9. The control circuit according to any one of claims 1 to 7, wherein the control module comprises a communication module, a motor driving module and a micro control unit, and the micro control unit is connected with the communication module and the motor driving module respectively.

10. An electric control valve, comprising a stator assembly, a rotor assembly, a valve core and a circuit board, wherein the stator assembly comprises a coil, the rotor assembly comprises a permanent magnet, the coil is electrically connected with the circuit board, the rotor assembly is in transmission connection with the valve core, an excitation magnetic field is generated after the coil is electrified, the rotor assembly rotates under the action of the excitation magnetic field to drive the valve core to move, and the circuit board is integrated with a control circuit of the electric control valve according to any one of claims 1 to 9.

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