Stirring device control circuit

Abstract

The utility model discloses a stirring device control circuit, which comprises a main control module, a power supply module, a positive and negative rotation driving module and a timing module, and is characterized in that the power supply module can convert commercial power into power supply voltage so as to supply power to the main control module, the positive and negative rotation driving module and a motor; the positive and negative rotation driving module comprises a U-phase switch unit, a V-phase switch unit and a W-phase switch unit, the output end of the U-phase switch unit is electrically connected with the U phase of the motor, the output end of the V-phase switch unit is electrically connected with the V phase of the motor, and the output end of the W-phase switch unit is electrically connected with the W phase of the motor; the main control module is electrically connected with the input end of the U-phase switch unit, the input end of the V-phase switch unit and the input end of the W-phase switch unit so as to control the on-off states of the U-phase switch unit, the V-phase switch unit and the W-phase switch unit, and therefore the current flow direction of a motor is controlled. And the timing module is electrically connected with the main control module and is used for setting the forward rotation time and the reverse rotation time of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring devices, in particular to a stirring device control circuit. Background Art

[0002] A common stirring device in life refers to a device that evenly mixes liquids or ingredients. The motors of existing blenders on the market all run in one direction. In some usage scenarios, such as porridge, the mixing is uneven, the user experience is not good, and the one-way rotation is prone to stalling and burning. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a stirring device control circuit with higher reliability.

[0004] According to the control circuit of the stirring device of the embodiment of the utility model, it includes a main control module, a power module, a forward and reverse drive module and a timing module. The power module can convert the mains electricity into a power supply voltage to power the main control module, the forward and reverse drive module and the motor. The forward and reverse drive module includes a U-phase switch unit, a V-phase switch unit and a W-phase switch unit. The output end of the U-phase switch unit is electrically connected to the U-phase of the motor, the output end of the V-phase switch unit is electrically connected to the V-phase of the motor, and the output end of the W-phase switch unit is electrically connected to the W-phase of the motor. The main control module is electrically connected to the input end of the U-phase switch unit, the input end of the V-phase switch unit and the input end of the W-phase switch unit respectively to control the on-off state of the U-phase switch unit, the V-phase switch unit and the W-phase switch unit, thereby controlling the current flow direction of the motor; the timing module is electrically connected to the main control module, and the timing module is used to set the forward rotation time and reverse rotation time of the motor.

[0005] According to some embodiments of the utility model, the U-phase switch unit includes a MOS tube Q1 and a MOS tube Q2, the V-phase switch unit includes a MOS tube Q3 and a MOS tube Q4, and the W-phase switch unit includes a MOS tube Q5 and a MOS tube Q6; the G pole of the MOS tube Q1, the G pole of the MOS tube Q3, and the G pole of the MOS tube Q5 are respectively electrically connected to the corresponding high-level signal end on the main control module, the G pole of the MOS tube Q2, the G pole of the MOS tube Q4, and the G pole of the MOS tube Q6 are respectively electrically connected to the corresponding low-level signal end on the main control module, the D pole of the MOS tube Q1, the D pole of the MOS tube Q3, and the D pole of the MOS tube Q5 are respectively electrically connected to the power module, the S pole of the MOS tube Q1 and the D pole of the MOS tube Q2 are respectively connected to the U phase of the motor, the S pole of the MOS tube Q3 and the D pole of the MOS tube Q4 are respectively connected to the V phase of the motor, and the S pole of the MOS tube Q5 and the D pole of the MOS tube Q6 are respectively connected to the W phase of the motor.

[0006] According to some embodiments of the present invention, the device further includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6, one end of the resistor R1 is electrically connected to the S pole of the MOS tube Q2 and one end of the resistor R2, the other end of the resistor R1 is electrically connected to one end of the resistor R3, the other end of the resistor R2 and the other end of the resistor R3 are electrically connected to a group of operational amplifier positive and negative pins of the main control module, one end of the resistor R4 is electrically connected to the S pole of the MOS tube Q4 and one end of the resistor R5, the other end of the resistor R4 is electrically connected to one end of the resistor R6, the other end of the resistor R5 and the other end of the resistor R6 are electrically connected to another group of operational amplifier positive and negative pins of the main control module.

[0007] According to some embodiments of the present utility model, the U-phase switch unit also includes a driving chip U1, a high-level pin of the driving chip U1 is electrically connected to the high-level signal terminal UH pin of the main control module, a low-level pin of the driving chip U1 is electrically connected to the low-level signal terminal UL pin of the main control module, a high-level output terminal GUH of the driving chip U1 is electrically connected to the G pole of the MOS tube Q1, a low-level output terminal GUL of the driving chip U1 is electrically connected to the G pole of the MOS tube Q2, and an offset voltage output terminal U of the driving chip U1 is electrically connected to the U phase of the motor; the V-phase switch unit also includes a driving chip U2, a high-level pin of the driving chip U2 is electrically connected to the high-level signal terminal VH pin of the main control module, and a low-level pin of the driving chip U2 is electrically connected to the low-level signal terminal The VL pin is electrically connected, the high-level output terminal GVH of the driving chip U2 is electrically connected to the G pole of the MOS tube Q3, the low-level output terminal GVL of the driving chip U2 is electrically connected to the G pole of the MOS tube Q4, and the offset voltage output terminal V of the driving chip U2 is electrically connected to the V phase of the motor; the W-phase switching unit also includes a driving chip U3, the high-level pin of the driving chip U3 is electrically connected to the high-level signal terminal UW pin of the main control module, the low-level pin of the driving chip U3 is electrically connected to the low-level signal terminal WL pin of the main control module, the high-level output terminal GWH of the driving chip U3 is electrically connected to the G pole of the MOS tube Q5, the low-level output terminal GWL of the driving chip U3 is electrically connected to the G pole of the MOS tube Q6, and the offset voltage output terminal W of the driving chip U3 is electrically connected to the W phase of the motor.

[0008] According to some embodiments of the utility model, the power supply module includes a rectifier unit, a first step-down unit, a second step-down unit and a motor auxiliary power supply unit, the input end of the rectifier unit is electrically connected to the mains, and the output end of the rectifier unit outputs a 310V DC voltage; the input ends of the first step-down unit and the motor auxiliary power supply unit are electrically connected to the output ends of the rectifier unit, respectively, and the output end of the first step-down unit is used to power the panel display; the output end of the motor auxiliary power supply unit can output a 15V voltage to power the VCC ends of the driver chip U1, the driver chip U2 and the driver chip U3 respectively; the input end of the second step-down unit is electrically connected to the output end of the motor auxiliary power supply unit, and the output end of the second step-down unit is electrically connected to the power supply end of the main control module.

[0009] According to some embodiments of the utility model, the first step-down unit includes a transformer T to step down 310V DC to 5V DC voltage; the motor auxiliary power supply unit includes a step-down chip U4 to step down 310V DC to 15V DC voltage; the second step-down unit includes a step-down chip Z1 to step down 15V DC to 5V DC voltage.

[0010] According to some embodiments of the utility model, a zero-crossing detection module is also included, which includes a diode D1, a transistor Q7, a resistor R7, a resistor R8, a resistor R9, a resistor R10 and a capacitor C1. The anode of the diode D1 is electrically connected to the mains live wire, the cathode of the diode D1 is electrically connected to one end of the resistor R8 and the base of the transistor Q7 via the resistor R7, the collector of the transistor Q7 is electrically connected to one end of the resistor R9 and one end of the resistor R10, the other end of the resistor R9 is connected to the power supply voltage, the other end of the resistor R10 and one end of the capacitor C1 are electrically connected to the zero-crossing detection end of the main control module, and the other end of the capacitor C1, the emitter of the transistor Q7 and the zero end of the resistor R8 are grounded respectively.

[0011] According to some embodiments of the utility model, a bus voltage detection module is also included, which includes a resistor R11, a resistor R12 and a capacitor C2, one end of the resistor R11 is connected to a 310V DC voltage, the other end of the resistor R11, one end of the capacitor C2 and one end of the resistor R12 are respectively electrically connected to the voltage detection end of the main control module, and the other end of the capacitor C2 and the other end of the resistor R12 are respectively grounded.

[0012] According to the stirring device control circuit of the embodiment of the utility model, there are at least the following beneficial effects: the on-off state of each of the U-phase switch unit, the V-phase switch unit and the W-phase switch unit is controlled by the main control module, thereby controlling the current flow direction of the motor and realizing the forward and reverse control of the motor. The forward time and the reverse time are set by the timing module, which is convenient for the user to choose forward stirring / reverse stirring, and can also stir alternately by forward and reverse. Especially when the rotor is blocked, a shorter forward time and reverse time are set by the timing module, so that the motor can be quickly reversed to achieve jitter, thereby getting rid of the blockage, avoiding burning, and having higher reliability.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings;

[0015] Figure 1 It is the structural block diagram of the stirring device control circuit;

[0016] Figure 2 It is the schematic diagram of the main control module of the stirring device control circuit;

[0017] Figure 3 It is the circuit schematic diagram of the forward and reverse drive module of the stirring device control circuit;

[0018] Figure 4 It is the circuit schematic diagram of the power module of the stirring device control circuit. DETAILED DESCRIPTION

[0019] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0020] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] Reference Figures 1 to 4 The utility model discloses a control circuit of a stirring device, comprising a main control module 10, a power module, a forward and reverse driving module 30 and a timing module. The power module can convert the main power into a power supply voltage to power the main control module 10, the forward and reverse driving module 30 and the motor. The forward and reverse driving module 30 comprises a U-phase switch unit, a V-phase switch unit and a W-phase switch unit. The output end of the U-phase switch unit is electrically connected to the U-phase of the motor, the output end of the V-phase switch unit is electrically connected to the V-phase of the motor, and the output end of the W-phase switch unit is electrically connected to the W-phase of the motor. The main control module 10 is electrically connected to the input end of the U-phase switch unit, the input end of the V-phase switch unit and the input end of the W-phase switch unit respectively to control the on-off state of the U-phase switch unit, the V-phase switch unit and the W-phase switch unit, thereby controlling the current flow direction of the motor; the timing module is electrically connected to the main control module 10, the main control module 10 adopts the existing main control chip U0, the timing module can be a separate timing circuit, and can also be integrated with the main control chip U0. The timing module is used to set the forward rotation time and reverse rotation time of the motor. The main control module 10 controls the on / off states of the U-phase switch unit, the V-phase switch unit, and the W-phase switch unit, thereby controlling the current flow direction of the motor and realizing the forward and reverse control of the motor. The forward time and reverse time are set by the timing module, so that the user can choose forward stirring / reverse stirring, or stir alternately by forward and reverse stirring to meet different functional requirements. Especially when the rotor is blocked, a shorter forward time and reverse time are set by the timing module, so that the motor can be quickly reversed to achieve jitter, thereby getting rid of the blockage and avoiding burning.

[0023] like Figure 3The U-phase switch unit includes a MOS tube Q1 and a MOS tube Q2, the V-phase switch unit includes a MOS tube Q3 and a MOS tube Q4, and the W-phase switch unit includes a MOS tube Q5 and a MOS tube Q6; the G poles of the MOS tube Q1, the G poles of the MOS tube Q3, and the G poles of the MOS tube Q5 are respectively electrically connected to the high-level signal terminals UH, VH, and WH of the main control chip U0, the G poles of the MOS tube Q2, the G poles of the MOS tube Q4, and the G poles of the MOS tube Q6 are respectively electrically connected to the low-level signal terminals UL, VL, and WL of the main control chip U0, the D poles of the MOS tube Q1, the D poles of the MOS tube Q3, and the D poles of the MOS tube Q5 are respectively electrically connected to the 310V voltage of the power module, the S poles of the MOS tube Q1 and the D poles of the MOS tube Q2 are respectively connected to the U phase of the motor, the S poles of the MOS tube Q3 and the D poles of the MOS tube Q4 are respectively connected to the V phase of the motor, and the S poles of the MOS tube Q5 and the D poles of the MOS tube Q6 are respectively connected to the W phase of the motor. It also includes resistors R1, R2, R3, R4, R5 and R6. One end of the resistor R1 is electrically connected to the S pole of the MOS tube Q2 and one end of the resistor R2, respectively. The other end of the resistor R1 is electrically connected to one end of the resistor R3. The other end of the resistor R2 and the other end of the resistor R3 are electrically connected to a group of operational amplifier positive and negative pins OPA1_IP and OPA1_IN of the main control chip U0, respectively, so as to amplify the signal for easy control; one end of the resistor R4 is electrically connected to the S pole of the MOS tube Q4 and one end of the resistor R5, respectively, the other end of the resistor R4 is electrically connected to one end of the resistor R6, and the other end of the resistor R5 and the other end of the resistor R6 are electrically connected to another group of operational amplifier positive and negative pins OPA0_IP and OPA0_IN of the main control module 10, respectively, so as to amplify the signal for easy control.

[0024] The U-phase switch unit also includes a drive chip U1, a high-level pin HIN of the drive chip U1 is electrically connected to a high-level signal terminal UH pin of the main control chip U0, a low-level pin LIN of the drive chip U1 is electrically connected to a low-level signal terminal UL pin of the main control chip U0, a high-level output terminal GUH of the drive chip U1 is electrically connected to the G pole of the MOS tube Q1, a low-level output terminal GUL of the drive chip U1 is electrically connected to the G pole of the MOS tube Q2, and an offset voltage output terminal U of the drive chip U1 is electrically connected to the U phase of the motor; the V-phase switch unit also includes a drive chip U2, a high-level pin HIN of the drive chip U2 is electrically connected to a high-level signal terminal VH pin of the main control chip U0, a low-level pin of the drive chip U2 is electrically connected to a low-level signal terminal VL pin of the main control chip U0. The W-phase switch unit also includes a drive chip U3, a high-level pin of the drive chip U3 is electrically connected to the high-level signal terminal UW pin of the main control chip U0, a low-level pin of the drive chip U3 is electrically connected to the low-level signal terminal WL pin of the main control chip U0, a high-level output terminal GWH of the drive chip U3 is electrically connected to the G pole of the MOS tube Q5, a low-level output terminal GWL of the drive chip U3 is electrically connected to the G pole of the MOS tube Q6, and an offset voltage output terminal W of the drive chip U3 is electrically connected to the W phase of the motor. The high-level signal terminal and the low-level signal terminal of the main control chip U0 output PWM control signals respectively, and the on-off state of the three-phase switch unit can be controlled by controlling the duty cycle of each PWM signal, thereby realizing the control of the current flow direction of the three-phase motor.

[0025] like Figure 4 The power module includes a rectifier unit 21, a first step-down unit 23, a second step-down unit 24 and a motor auxiliary power supply unit 22. The input end of the rectifier unit 21 is electrically connected to the mains, and the output end of the rectifier unit 21 outputs a 310V DC voltage; the input ends of the first step-down unit 23 and the motor auxiliary power supply unit 22 are electrically connected to the output end of the rectifier unit 21, respectively, and the output end of the first step-down unit 23 supplies power to the panel display; the output end of the motor auxiliary power supply unit 22 can output a 15V voltage to supply power to the VCC ends of the driver chip U1, the driver chip U2 and the driver chip U3 respectively; the input end of the second step-down unit 24 is electrically connected to the output end of the motor auxiliary power supply unit 22, and the output end of the second step-down unit 24 is electrically connected to the power supply end of the main control module 10. The first step-down unit includes a transformer T to step down 310V DC to 5V DC voltage; the motor auxiliary power supply unit 22 includes a step-down chip U4 to step down 310V DC to 15V DC voltage; the second step-down unit 24 includes a step-down chip Z1 to step down 15V DC to 5V DC voltage.

[0026] It also includes a zero-crossing detection module 40, which includes a diode D1, a transistor Q7, a resistor R7, a resistor R8, a resistor R9, a resistor R10 and a capacitor C1. The anode of the diode D1 is electrically connected to the main power live wire, the cathode of the diode D1 is electrically connected to one end of the resistor R8 and the base of the transistor Q7 through the resistor R7, the collector of the transistor Q7 is electrically connected to one end of the resistor R9 and one end of the resistor R10, the other end of the resistor R9 is connected to the power supply voltage, the other end of the resistor R10 and one end of the capacitor C1 are electrically connected to the zero-crossing detection end of the main control module 10, and the other end of the capacitor C1, the emitter of the transistor Q7 and the zero end of the resistor R8 are grounded respectively. The bus voltage detection module 50 is also included. The bus voltage detection module 50 includes a resistor R11, a resistor R12 and a capacitor C2. One end of the resistor R11 is connected to a 310V DC voltage. The other end of the resistor R11, one end of the capacitor C2 and one end of the resistor R12 are respectively electrically connected to the voltage detection end of the main control module 10. The other end of the capacitor C2 and the other end of the resistor R12 are respectively grounded. Through zero-crossing detection and bus voltage detection, the circuit has higher reliability.

[0027] It is easy for those skilled in the art to understand that the above preferred embodiments can be freely combined and superimposed without conflict.

[0028] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A stirring device control circuit, characterized in that: include: A main control module (10), a power module, a forward and reverse drive module (30) and a timing module, wherein the power module is capable of converting the mains electricity into a power supply voltage to supply power to the main control module (10), the forward and reverse drive module (30) and the motor, the forward and reverse drive module (30) comprising a U-phase switch unit, a V-phase switch unit and a W-phase switch unit, the output end of the U-phase switch unit being electrically connected to the U-phase of the motor, the output end of the V-phase switch unit being electrically connected to the V-phase of the motor, and the output end of the W-phase switch unit being electrically connected to the W-phase of the motor, the main control module (10) being electrically connected to the input end of the U-phase switch unit, the input end of the V-phase switch unit and the input end of the W-phase switch unit respectively to control the on and off states of the U-phase switch unit, the V-phase switch unit and the W-phase switch unit, thereby controlling the current flow direction of the motor; the timing module is electrically connected to the main control module (10), and is used to set the forward rotation time and reverse rotation time of the motor.

2. The stirring device control circuit according to claim 1, characterized in that: The U-phase switch unit comprises a MOS tube Q1 and a MOS tube Q2, the V-phase switch unit comprises a MOS tube Q3 and a MOS tube Q4, and the W-phase switch unit comprises a MOS tube Q5 and a MOS tube Q6; the G poles of the MOS tube Q1, the G poles of the MOS tube Q3, and the G poles of the MOS tube Q5 are respectively electrically connected to the corresponding high-level signal terminals on the main control module (10), the G poles of the MOS tube Q2, the G poles of the MOS tube Q4, and the G poles of the MOS tube Q6 are respectively electrically connected to the corresponding low-level signal terminals on the main control module (10), the D poles of the MOS tube Q1, the D poles of the MOS tube Q3, and the D poles of the MOS tube Q5 are respectively electrically connected to the power module, the S poles of the MOS tube Q1 and the D poles of the MOS tube Q2 are respectively connected to the U phase of the motor, the S poles of the MOS tube Q3 and the D poles of the MOS tube Q4 are respectively connected to the V phase of the motor, and the S poles of the MOS tube Q5 and the D poles of the MOS tube Q6 are respectively connected to the W phase of the motor.

3. The stirring device control circuit according to claim 2, characterized in that: It also includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6, one end of the resistor R1 is electrically connected to the S pole of the MOS tube Q2 and one end of the resistor R2, the other end of the resistor R1 is electrically connected to one end of the resistor R3, the other end of the resistor R2 and the other end of the resistor R3 are electrically connected to a group of positive and negative pins of an operational amplifier of the main control module (10), one end of the resistor R4 is electrically connected to the S pole of the MOS tube Q4 and one end of the resistor R5, the other end of the resistor R4 is electrically connected to one end of the resistor R6, the other end of the resistor R5 and the other end of the resistor R6 are electrically connected to another group of positive and negative pins of the operational amplifier of the main control module (10).

4. The stirring device control circuit according to claim 2, characterized in that: The U-phase switch unit further comprises a drive chip U1, a high-level pin of the drive chip U1 is electrically connected to a high-level signal terminal UH pin of the main control module (10), a low-level pin of the drive chip U1 is electrically connected to a low-level signal terminal UL pin of the main control module (10), a high-level output terminal GUH of the drive chip U1 is electrically connected to a G pole of a MOS tube Q1, a low-level output terminal GUL of the drive chip U1 is electrically connected to a G pole of a MOS tube Q2, and an offset voltage output terminal U of the drive chip U1 is electrically connected to a U-phase of the motor; the V-phase switch unit further comprises a drive chip U2, a high-level pin of the drive chip U2 is electrically connected to a high-level signal terminal VH pin of the main control module (10), a low-level pin of the drive chip U2 is electrically connected to a low-level signal terminal VL pin of the main control module (10). The W-phase switch unit further comprises a drive chip U3, a high-level pin of the drive chip U3 is electrically connected to the high-level signal terminal UW pin of the main control module (10), a low-level pin of the drive chip U3 is electrically connected to the low-level signal terminal WL pin of the main control module (10), a high-level output terminal GWH of the drive chip U3 is electrically connected to the G-pole of the MOS tube Q5, a low-level output terminal GWL of the drive chip U3 is electrically connected to the G-pole of the MOS tube Q6, and an offset voltage output terminal W of the drive chip U3 is electrically connected to the W-phase of the motor.

5. The stirring device control circuit according to claim 4, characterized in that: The power module comprises a rectifier unit (21), a first step-down unit (23), a second step-down unit (24) and a motor auxiliary power supply unit (22); the input end of the rectifier unit (21) is electrically connected to the mains, and the output end of the rectifier unit (21) outputs a 310V DC voltage; the input ends of the first step-down unit (23) and the motor auxiliary power supply unit (22) are respectively electrically connected to the output end of the rectifier unit (21), and the output end of the first step-down unit (23) supplies power to a panel display; the output end of the motor auxiliary power supply unit (22) can output a 15V voltage to supply power to the VCC ends of the drive chip U1, the drive chip U2 and the drive chip U3 respectively; the input end of the second step-down unit (24) is electrically connected to the output end of the motor auxiliary power supply unit (22), and the output end of the second step-down unit (24) is electrically connected to the power supply end of the main control module (10).

6. The stirring device control circuit according to claim 5, characterized in that: The first step-down unit comprises a transformer T for stepping down a 310V DC voltage into a 5V DC voltage; the motor auxiliary power supply unit (22) comprises a step-down chip U4 for stepping down a 310V DC voltage into a 15V DC voltage; the second step-down unit (24) comprises a step-down chip Z1 for stepping down a 15V DC voltage into a 5V DC voltage.

7. The stirring device control circuit according to claim 5, characterized in that: It also includes a zero-crossing detection module (40), which includes a diode D1, a transistor Q7, a resistor R7, a resistor R8, a resistor R9, a resistor R10 and a capacitor C1, wherein the anode of the diode D1 is electrically connected to the mains live wire, the cathode of the diode D1 is electrically connected to one end of the resistor R8 and the base of the transistor Q7 via the resistor R7, the collector of the transistor Q7 is electrically connected to one end of the resistor R9 and one end of the resistor R10, the other end of the resistor R9 is connected to the power supply voltage, the other end of the resistor R10 and one end of the capacitor C1 are electrically connected to the zero-crossing detection end of the main control module (10), and the other end of the capacitor C1, the emitter of the transistor Q7 and the zero end of the resistor R8 are grounded.

8. The stirring device control circuit according to claim 5, characterized in that: It also includes a bus voltage detection module (50), the bus voltage detection module (50) including a resistor R11, a resistor R12 and a capacitor C2, one end of the resistor R11 is connected to a 310V DC voltage, the other end of the resistor R11, one end of the capacitor C2 and one end of the resistor R12 are respectively electrically connected to the voltage detection end of the main control module (10), and the other end of the capacitor C2 and the other end of the resistor R12 are respectively grounded.

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