Control circuit of corn popper

Abstract

The utility model discloses a control circuit of a corn popper, which comprises a microprogrammed control unit (MCU) master control module, a master control chip U1 is arranged in the MCU master control module, and a relay control module is arranged in the MCU master control module. According to the utility model, the main control chip U1 is matched with the oil metering switch SW7, the stirring switch SW3, the oil melting switch SW6, the oil pumping switch SW8, the lighting switch SW5, the power switch SW1, the K-type thermocouple and the heating switch SW2, so that the oil quantity, the heating temperature and the heating condition can be automatically controlled, the automation degree is improved, and the prepared popcorn is better in taste, and is suitable for popularization and application. In addition, the arrangement of the exhaust module, the relay control module and the stabilized voltage supply circuit can improve the stability of the corn popper in the working process and meet the use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of popcorn machines, in particular to a control circuit of a popcorn machine. Background Art

[0002] A popcorn machine is a special machine for making popcorn. The degree of automation of the popcorn machine in the prior art is low. The control of the oil amount, heating temperature and heating conditions are usually controlled by personnel. Inaccurate control often results in poor taste of the popcorn produced, which cannot meet the use requirements. Based on the above situation, we propose a control circuit for a popcorn machine. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a control circuit for a popcorn machine.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A control circuit of a popcorn machine, comprising an MCU main control module, wherein the MCU main control module has a main control chip U1 built in, the MCU main control module has a relay control module built in, and the MCU main control module is electrically connected to a terminal signal input and output module, a temperature display module, an oil measuring module, a stirring module, an oil melting module, an exhaust module, an oil extraction module, a lighting module, a power supply module and a heating module;

[0006] The temperature display module is built with a display digital tube, and the oil measuring module, stirring module, oil melting module, exhaust module, oil extraction module, lighting module, power supply module and heating module are respectively built with an oil measuring switch SW7, a stirring switch SW3, an oil melting switch SW6, an exhaust switch SW4, an oil extraction switch SW8, a lighting switch SW5, a power switch SW1 and a heating switch SW2;

[0007] The oil extraction module also has an oil extraction timing module built in, the power supply module also has a voltage-stabilized power supply circuit built in, the heating module also has a K-type thermocouple built in, and the lighting module includes an LED lamp.

[0008] Preferably, pin 1, pin 9, pin 24, pin 48 and pin 36 of the main control chip U1 are electrically connected to a DC 3.3V voltage, the DC 3.3V voltage is electrically connected to one end of a resistor R3, the other end of the resistor R3 is electrically connected to pin 2 of a switch SW9 and one end of a capacitor C6, the other end of the resistor R3 is also electrically connected to pin 7 of the main control chip U1, the other end of the capacitor C6 is electrically connected to pin 4 of the switch SW9, the other end of the capacitor C6 is also grounded, and pins 18 and 18 of the main control chip U1 are electrically connected to the pins 1 and 2 of the switch SW9. 9. Pin 20, pin 41, pin 42, pin 43, pin 45 and pin 46 are electrically connected to one end of the power switch SW1, one end of the heating switch SW2, one end of the stirring switch SW3, one end of the exhaust switch SW4, one end of the lighting switch SW5, one end of the melting oil switch SW6, one end of the oil measuring switch SW7 and one end of the oil pumping switch SW8, respectively. Pin 47 of the main control chip U1 is electrically connected to one end of the capacitor C7. Pin 8, pin 23, pin 35 and pin 47 of the main control chip U1 are all grounded.

[0009] Pin 2 of the main control chip U1 is electrically connected to one end of the resistor R4, the other end of the resistor R4 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to pin 2 of the buzzer, the emitter of the transistor Q1 is grounded, and pin 1 of the buzzer is electrically connected to a DC 5V voltage.

[0010] Preferably, pin 4 of the power switch SW1, pin 4 of the heating switch SW2, pin 4 of the stirring switch SW3, pin 4 of the exhaust switch SW4, pin 4 of the lighting switch SW5, pin 4 of the melt switch SW6, pin 4 of the oil measuring switch SW7 and pin 4 of the oil extraction switch SW8 are all grounded.

[0011] Preferably, the display digital tube includes chip U2, chip U3 and chip U4, pin 8 of chip U2, pin 8 of chip U3 and pin 8 of chip U4 are all grounded, pin 16 and pin 10 of chip U2, pin 16 and pin 10 of chip U3 and pin 16 and pin 10 of chip U4 are all electrically connected to a DC 3.3V voltage, pin 9 of chip U2 is electrically connected to pin 14 of chip U3, and pin 9 of chip U3 is electrically connected to pin 14 of chip U4.

[0012] Preferably, the K-type thermocouple includes a chip U6 and a chip U7, pins 1 and 2 of the chip U6 are both grounded, pin 2 of the chip U6 is also electrically connected to pin 2 of the transformer P1, pin 3 of the chip U6 is electrically connected to pin 1 of the transformer P1, pin 3 of the chip U6 is also electrically connected to one end of a capacitor C8, the other end of the capacitor C8 is electrically connected to pin 2 of the chip U6, pin 4 of the chip U6 is electrically connected to one end of a capacitor C9, and the other end of the capacitor C9 is grounded;

[0013] Pin 1, pin 2, pin 3, pin 4 and pin 7 of the chip U7 are all grounded, pin 5 of the chip U7 is electrically connected to one end of the resistor R2, pin 6 of the chip U7 is electrically connected to one end of the resistor R1, and the other end of the resistor R2, the other end of the resistor R1 and pin 8 of the chip U7 are all electrically connected to a DC 3.3V voltage.

[0014] Preferably, the terminal signal input and output module includes a reserved port CN4, a test port CN1, an output signal port CN2 and an output signal port CN3, and the output signal port CN2 and the output signal port CN3 both output signals to the lower control board.

[0015] Preferably, the voltage-stabilized power supply circuit includes a chip U8, pin 1 of chip U8 is grounded, pin 2 of chip U8 is electrically connected to one end of capacitor C2, the other end of capacitor C2 is electrically connected to one end of capacitor C1 and one end of bidirectional breakdown diode D1, the other end of capacitor C2, one end of capacitor C1 and one end of bidirectional breakdown diode D1 are all grounded, pin 2 of chip U8 is also electrically connected to a DC 5V voltage, the other end of capacitor C1 and the other end of bidirectional breakdown diode D1 are both electrically connected to the DC 5V voltage, pin 3 of chip U8 is electrically connected to a DC 3.3V voltage, the DC 3.3V voltage is electrically connected to one end of capacitor C3, one end of capacitor C4 and one end of capacitor C5, the other end of capacitor C3, the other end of capacitor C4 and the other end of capacitor C5 are all grounded.

[0016] Preferably, the power supply module includes a chip U9 and a chip U10, a pin 1 of the chip U9 is electrically connected to a pin 2 of the transformer P5, a pin 1 of the transformer P5 is electrically connected to a pin 2 of the fuse F1, and a pin 4 and a pin 3 of the chip U9 are electrically connected to a pin 1 of the transformer P8 and a pin 2 of the transformer P8, respectively;

[0017] Pin 1 of the chip U10 is electrically connected to a DC 24V voltage, the DC 24V voltage is electrically connected to one end of a capacitor C11 and one end of a capacitor C12, the other end of the capacitor C11 and the other end of the capacitor C12 are both grounded, pin 2 of the chip U10 is electrically connected to one end of an inductor L1 and a negative electrode of a diode D11, the other end of the inductor L1 is electrically connected to one end of a capacitor C13, one end of a resistor R18 and one end of a capacitor C14, the other end of the capacitor C14, the other end of the capacitor C13 and the positive electrode of the diode D11 are all grounded, pin 4 of the chip U10 is electrically connected to one end of a capacitor C15, one end of a resistor R19 and the other end of a resistor R18, the other end of the capacitor C15 and the other end of the resistor R19 are both grounded, and pin 5, pin 6 and pin 3 of the chip U10 are all grounded.

[0018] Compared with the existing technology, the beneficial effects of the utility model are:

[0019] The utility model can automatically control the amount of oil, heating temperature and heating conditions through the cooperation of the main control chip U1 and the oil measuring switch SW7, the stirring switch SW3, the oil melting switch SW6, the oil extraction switch SW8, the lighting switch SW5, the power switch SW1, the K-type thermocouple and the heating switch SW2, thereby improving the degree of automation and producing popcorn with a better taste. In addition, the setting of the exhaust module, the relay control module and the voltage-stabilized power supply circuit can improve the stability of the popcorn machine during operation and meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a module block diagram of a control circuit of a popcorn machine proposed by the utility model;

[0021] Figure 2 A circuit diagram of a main control chip U1 of a control circuit of a popcorn machine proposed by the utility model;

[0022] Figure 3 A circuit diagram of a switch SW9 connected to a main control chip U1 in a control circuit of a popcorn machine proposed by the utility model;

[0023] Figure 4 The utility model provides a circuit diagram of a resistor R4 connected to a main control chip U1, a transistor Q1 and a buzzer in a control circuit of a popcorn machine;

[0024] Figure 5 A circuit diagram of an oil measuring switch SW7, a stirring switch SW3, an oil melting switch SW6, an exhaust switch SW4, an oil extraction switch SW8, a lighting switch SW5, a power switch SW1 and a heating switch SW2 of a control circuit of a popcorn machine proposed by the utility model;

[0025] Figure 6 A circuit diagram of a display digital tube of a control circuit of a popcorn machine proposed by the utility model;

[0026] Figure 7 A circuit diagram of a K-type thermocouple of a control circuit of a popcorn machine proposed by the utility model;

[0027] Figure 8 A circuit diagram of a terminal signal input and output module of a control circuit of a popcorn machine proposed by the utility model;

[0028] Fig. 9 A circuit diagram of a voltage-stabilized power supply circuit of a control circuit of a popcorn machine proposed by the utility model;

[0029] Fig.10This is a circuit diagram of chip U9 in a power supply module of a control circuit of a popcorn machine proposed by the utility model;

[0030] Fig.11 This is a circuit diagram of a chip U10 in a power supply module of a control circuit of a popcorn machine proposed by the utility model. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] Reference Figure 1-11 , a control circuit of a popcorn machine, including an MCU main control module, the MCU main control module has a main control chip U1 built in, the MCU main control module has a relay control module built in, the MCU main control module is electrically connected with a terminal signal input and output module, a temperature display module, an oil measuring module, a stirring module, an oil melting module, an exhaust module, an oil extraction module, a lighting module, a power supply module and a heating module, wherein the terminal signal input and output module includes a reserved port CN4, a test port CN1, an output signal port CN2 and an output signal port CN3, and the output signal port CN2 and the output signal port CN3 both output signals to a lower control board;

[0033] The temperature display module is built with a display digital tube, wherein the display digital tube includes a chip U2, a chip U3 and a chip U4, pin 8 of chip U2, pin 8 of chip U3 and pin 8 of chip U4 are all grounded, pin 16 and pin 10 of chip U2, pin 16 and pin 10 of chip U3 and pin 16 and pin 10 of chip U4 are all electrically connected to a DC 3.3V voltage, pin 9 of chip U2 is electrically connected to pin 14 of chip U3, and pin 9 of chip U3 is electrically connected to pin 14 of chip U4;

[0034] The oil measuring module, stirring module, oil melting module, exhaust module, oil extraction module, lighting module, power supply module and heating module are respectively equipped with an oil measuring switch SW7, a stirring switch SW3, an oil melting switch SW6, an exhaust switch SW4, an oil extraction switch SW8, a lighting switch SW5, a power switch SW1 and a heating switch SW2, wherein pin 4 of the power switch SW1, pin 4 of the heating switch SW2, pin 4 of the stirring switch SW3, pin 4 of the exhaust switch SW4, pin 4 of the lighting switch SW5, pin 4 of the oil melting switch SW6, pin 4 of the oil measuring switch SW7 and pin 4 of the oil extraction switch SW8 are all grounded;

[0035] Among them, pin 1, pin 9, pin 24, pin 48 and pin 36 of the main control chip U1 are all electrically connected to a DC 3.3V voltage, the DC 3.3V voltage is electrically connected to one end of a resistor R3, the other end of the resistor R3 is electrically connected to pin 2 of a switch SW9 and one end of a capacitor C6, the other end of the resistor R3 is also electrically connected to pin 7 of the main control chip U1, the other end of the capacitor C6 is electrically connected to pin 4 of the switch SW9, the other end of the capacitor C6 is also grounded, and pins 18, 19, Pin 20, pin 41, pin 42, pin 43, pin 45 and pin 46 are electrically connected to one end of the power switch SW1, one end of the heating switch SW2, one end of the stirring switch SW3, one end of the exhaust switch SW4, one end of the lighting switch SW5, one end of the melting oil switch SW6, one end of the oil measuring switch SW7 and one end of the oil pumping switch SW8, respectively. Pin 47 of the main control chip U1 is electrically connected to one end of the capacitor C7. Pin 8, pin 23, pin 35 and pin 47 of the main control chip U1 are all grounded.

[0036] Pin 2 of the main control chip U1 is electrically connected to one end of the resistor R4, the other end of the resistor R4 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to pin 2 of the buzzer, the emitter of the transistor Q1 is grounded, and pin 1 of the buzzer is electrically connected to a DC 5V voltage;

[0037] The oil extraction module also has a built-in oil extraction timing module, and the power supply module also has a built-in voltage-stabilized power supply circuit, wherein the voltage-stabilized power supply circuit includes a chip U8, wherein pin 1 of the chip U8 is grounded, and pin 2 of the chip U8 is electrically connected to one end of a capacitor C2, and the other end of the capacitor C2 is electrically connected to one end of a capacitor C1 and one end of a bidirectional breakdown diode D1, and the other end of the capacitor C2, one end of the capacitor C1, and one end of the bidirectional breakdown diode D1 are all grounded, and pin 2 of the chip U8 is also electrically connected to a DC 5V voltage, and the other end of the capacitor C1 and the other end of the bidirectional breakdown diode D1 are both electrically connected to the DC 5V voltage, and pin 3 of the chip U8 is electrically connected to a DC 3.3V voltage, and the DC 3.3V voltage is electrically connected to one end of a capacitor C3, one end of a capacitor C4, and one end of a capacitor C5, and the other end of the capacitor C3, the other end of the capacitor C4, and the other end of the capacitor C5 are all grounded;

[0038] The power supply module includes a chip U9 and a chip U10, wherein the pin 1 of the chip U9 is electrically connected to the pin 2 of the transformer P5, the pin 1 of the transformer P5 is electrically connected to the pin 2 of the fuse F1, and the pin 4 and the pin 3 of the chip U9 are electrically connected to the pin 1 of the transformer P8 and the pin 2 of the transformer P8 respectively;

[0039] Pin 1 of chip U10 is electrically connected to a DC 24V voltage, which is electrically connected to one end of capacitor C11 and one end of capacitor C12, and the other end of capacitor C11 and the other end of capacitor C12 are both grounded. Pin 2 of chip U10 is electrically connected to one end of inductor L1 and the negative electrode of diode D11, and the other end of inductor L1 is electrically connected to one end of capacitor C13, one end of resistor R18 and one end of capacitor C14, and the other end of capacitor C14, the other end of capacitor C13 and the positive electrode of diode D11 are all grounded. Pin 4 of chip U10 is electrically connected to one end of capacitor C15, one end of resistor R19 and the other end of resistor R18, and the other end of capacitor C15 and the other end of resistor R19 are both grounded. Pin 5, pin 6 and pin 3 of chip U10 are all grounded.

[0040] The heating module is also built with a K-type thermocouple, wherein the K-type thermocouple includes a chip U6 and a chip U7, pins 1 and 2 of the chip U6 are both grounded, pin 2 of the chip U6 is also electrically connected to pin 2 of the transformer P1, pin 3 of the chip U6 is electrically connected to pin 1 of the transformer P1, pin 3 of the chip U6 is also electrically connected to one end of a capacitor C8, the other end of the capacitor C8 is electrically connected to pin 2 of the chip U6, pin 4 of the chip U6 is electrically connected to one end of a capacitor C9, and the other end of the capacitor C9 is grounded;

[0041] Pin 1, pin 2, pin 3, pin 4 and pin 7 of chip U7 are all grounded, pin 5 of chip U7 is electrically connected to one end of resistor R2, pin 6 of chip U7 is electrically connected to one end of resistor R1, and the other end of resistor R2, the other end of resistor R1 and pin 8 of chip U7 are all electrically connected to a DC 3.3V voltage;

[0042] The lighting module includes an LED lamp, which is used for lighting operations. The utility model can automatically control the amount of oil, heating temperature and heating conditions through the cooperation of the main control chip U1 and the oil measuring switch SW7, the stirring switch SW3, the oil melting switch SW6, the oil extraction switch SW8, the lighting switch SW5, the power switch SW1, the K-type thermocouple and the heating switch SW2, thereby improving the degree of automation and producing popcorn with a better taste. In addition, the setting of the exhaust module, the relay control module and the voltage-stabilized power supply circuit can improve the stability of the popcorn machine during operation and meet the use requirements.

[0043] Working principle: When in use, the setting of the voltage-stabilizing power supply circuit in the power supply module can stabilize the voltage of the popcorn machine, stabilize the pressure supply, and improve the working stability of the popcorn machine. When the oil is pumping, the main control chip U1 controls the oil pumping switch SW8 and the oil measuring switch SW7 to turn on, and then the oil pumping operation is carried out. At the same time, the oil pumping timing module performs timing and the oil measuring module performs oil measuring operation. When the oil pumping time is reached, the main control chip U1 controls the oil pumping switch SW8 and the oil measuring switch SW7 to close, and then the main control chip U1 controls the oil melting switch SW6 to open. The oil melting operation is started, and after the oil is melted, the stirring switch SW3 and the heating switch SW2 are controlled to be turned on for stirring and heating, and popcorn is made by stirring and heating. The main control chip U1 cooperates with the oil measuring module, the stirring module, the oil melting module, the exhaust module, the oil extraction module, the lighting module, the power supply module and the heating module, so that the oil amount, the heating temperature and the heating condition can be automatically and effectively controlled during the process of making popcorn, so that the popcorn taste is better, and the setting of the K-type thermocouple during the heating process can improve the heating uniformity effect;

[0044] During the oil extraction process, the main control chip U1 controls the lighting switch SW5 to turn on the LED light to illuminate the inside of the popcorn machine. The exhaust module is set to perform stable exhaust during the popcorn operation to achieve the effect of auxiliary heat dissipation. At the same time, the exhaust can be used to assist in discharging the material. The temperature display module is set to clearly display the temperature conditions of the popcorn machine during operation, which is convenient for personnel to intuitively understand the internal conditions of the popcorn machine.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A control circuit of a popcorn machine, comprising an MCU main control module, wherein the MCU main control module has a built-in main control chip U1, characterized in that: The MCU main control module has a built-in relay control module, and the MCU main control module is electrically connected to a terminal signal input and output module, a temperature display module, an oil measuring module, a stirring module, an oil melting module, an exhaust module, an oil extraction module, a lighting module, a power supply module and a heating module; The temperature display module is built with a display digital tube, and the oil measuring module, stirring module, oil melting module, exhaust module, oil extraction module, lighting module, power supply module and heating module are respectively built with an oil measuring switch SW7, a stirring switch SW3, an oil melting switch SW6, an exhaust switch SW4, an oil extraction switch SW8, a lighting switch SW5, a power switch SW1 and a heating switch SW2; The oil extraction module also has an oil extraction timing module built in, the power supply module also has a voltage-stabilized power supply circuit built in, the heating module also has a K-type thermocouple built in, and the lighting module includes an LED lamp.

2. The control circuit of a popcorn machine according to claim 1, characterized in that: Pin 1, pin 9, pin 24, pin 48 and pin 36 of the main control chip U1 are electrically connected to a DC 3.3V voltage, the DC 3.3V voltage is electrically connected to one end of a resistor R3, the other end of the resistor R3 is electrically connected to pin 2 of a switch SW9 and one end of a capacitor C6, the other end of the resistor R3 is also electrically connected to pin 7 of the main control chip U1, the other end of the capacitor C6 is electrically connected to pin 4 of the switch SW9, the other end of the capacitor C6 is also grounded, and pins 18, 19, Pin 20, pin 41, pin 42, pin 43, pin 45 and pin 46 are electrically connected to one end of the power switch SW1, one end of the heating switch SW2, one end of the stirring switch SW3, one end of the exhaust switch SW4, one end of the lighting switch SW5, one end of the melting oil switch SW6, one end of the oil measuring switch SW7 and one end of the oil pumping switch SW8, respectively. Pin 47 of the main control chip U1 is electrically connected to one end of the capacitor C7. Pin 8, pin 23, pin 35 and pin 47 of the main control chip U1 are all grounded. Pin 2 of the main control chip U1 is electrically connected to one end of the resistor R4, the other end of the resistor R4 is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is electrically connected to pin 2 of the buzzer, the emitter of the transistor Q1 is grounded, and pin 1 of the buzzer is electrically connected to a DC 5V voltage.

3. The control circuit of a popcorn machine according to claim 2, characterized in that: Pin 4 of the power switch SW1, pin 4 of the heating switch SW2, pin 4 of the stirring switch SW3, pin 4 of the exhaust switch SW4, pin 4 of the lighting switch SW5, pin 4 of the melting oil switch SW6, pin 4 of the oil measuring switch SW7 and pin 4 of the oil extraction switch SW8 are all grounded.

4. The control circuit of a popcorn machine according to claim 1, characterized in that: The display digital tube includes chip U2, chip U3 and chip U4, pin 8 of chip U2, pin 8 of chip U3 and pin 8 of chip U4 are all grounded, pin 16 and pin 10 of chip U2, pin 16 and pin 10 of chip U3 and pin 16 and pin 10 of chip U4 are all electrically connected to a DC 3.3V voltage, pin 9 of chip U2 is electrically connected to pin 14 of chip U3, and pin 9 of chip U3 is electrically connected to pin 14 of chip U4.

5. The control circuit of a popcorn machine according to claim 1, characterized in that: The K-type thermocouple includes a chip U6 and a chip U7, wherein the pin 1 and the pin 2 of the chip U6 are both grounded, the pin 2 of the chip U6 is also electrically connected to the pin 2 of the transformer P1, the pin 3 of the chip U6 is electrically connected to the pin 1 of the transformer P1, the pin 3 of the chip U6 is also electrically connected to one end of a capacitor C8, the other end of the capacitor C8 is electrically connected to the pin 2 of the chip U6, the pin 4 of the chip U6 is electrically connected to one end of a capacitor C9, and the other end of the capacitor C9 is grounded; Pin 1, pin 2, pin 3, pin 4 and pin 7 of the chip U7 are all grounded, pin 5 of the chip U7 is electrically connected to one end of the resistor R2, pin 6 of the chip U7 is electrically connected to one end of the resistor R1, and the other end of the resistor R2, the other end of the resistor R1 and pin 8 of the chip U7 are all electrically connected to a DC 3.3V voltage.

6. The control circuit of a popcorn machine according to claim 1, characterized in that: The terminal signal input and output module includes a reserved port CN4, a test port CN1, an output signal port CN2 and an output signal port CN3. The output signal port CN2 and the output signal port CN3 both output signals to the lower control board.

7. The control circuit of a popcorn machine according to claim 1, characterized in that: The voltage-stabilized power supply circuit includes a chip U8, wherein pin 1 of chip U8 is grounded, pin 2 of chip U8 is electrically connected to one end of capacitor C2, the other end of capacitor C2 is electrically connected to one end of capacitor C1 and one end of bidirectional breakdown diode D1, the other end of capacitor C2, one end of capacitor C1 and one end of bidirectional breakdown diode D1 are all grounded, pin 2 of chip U8 is also electrically connected to a DC 5V voltage, the other end of capacitor C1 and the other end of bidirectional breakdown diode D1 are both electrically connected to the DC 5V voltage, pin 3 of chip U8 is electrically connected to a DC 3.3V voltage, the DC 3.3V voltage is electrically connected to one end of capacitor C3, one end of capacitor C4 and one end of capacitor C5, the other end of capacitor C3, the other end of capacitor C4 and the other end of capacitor C5 are all grounded.

8. The control circuit of a popcorn machine according to claim 1, characterized in that: The power supply module includes a chip U9 and a chip U10, wherein the pin 1 of the chip U9 is electrically connected to the pin 2 of the transformer P5, the pin 1 of the transformer P5 is electrically connected to the pin 2 of the fuse F1, and the pin 4 and the pin 3 of the chip U9 are electrically connected to the pin 1 of the transformer P8 and the pin 2 of the transformer P8 respectively; Pin 1 of the chip U10 is electrically connected to a DC 24V voltage, the DC 24V voltage is electrically connected to one end of a capacitor C11 and one end of a capacitor C12, the other end of the capacitor C11 and the other end of the capacitor C12 are both grounded, pin 2 of the chip U10 is electrically connected to one end of an inductor L1 and a negative electrode of a diode D11, the other end of the inductor L1 is electrically connected to one end of a capacitor C13, one end of a resistor R18 and one end of a capacitor C14, the other end of the capacitor C14, the other end of the capacitor C13 and the positive electrode of the diode D11 are all grounded, pin 4 of the chip U10 is electrically connected to one end of a capacitor C15, one end of a resistor R19 and the other end of a resistor R18, the other end of the capacitor C15 and the other end of the resistor R19 are both grounded, and pin 5, pin 6 and pin 3 of the chip U10 are all grounded.

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