Particle oven control circuit and particle oven

Abstract

According to the particle oven control circuit, the input end of a switching power supply module is used for being connected with an alternating current power supply, and the output end of the switching power supply module is used for outputting various direct current power supplies with different voltages; the power supply end of the microcontroller is connected with the output end of the switching power supply module; the power supply end of the direct-current feeding motor driving module is connected with the output end of the switching power supply module, the rotating speed feedback end of the direct-current feeding motor driving module is connected with the rotating speed signal receiving end of the microcontroller, and the rotating speed control end of the direct-current feeding motor driving module is connected with the rotating speed signal output end of the microcontroller. The direct-current feeding motor driving module is used for being connected with a direct-current feeding motor. The first optocoupler and the second optocoupler are arranged in the direct-current feeding motor driving module, so that signals between the direct-current feeding motor and the microcontroller are isolated, mutual interference between the signals of the direct-current motor and the signals of the microcontroller is prevented, and the stability of the particle oven control circuit is improved.

Description

Technical Field

[0001] The present application relates to the technical field of ovens, and in particular to a pellet oven control circuit and a pellet oven. Background Art

[0002] A pellet oven is a type of oven that uses biomass energy as fuel, so it is also called a biomass pellet oven. In order to achieve continuous combustion of the pellet oven, a DC motor can be used to feed the material, and the temperature in the oven cavity can be controlled by controlling the speed of the DC motor. In the related art, when controlling a DC motor, the controller is directly connected to the DC motor drive circuit. In this case, the signal of the DC motor will interfere with the signal of the controller, affecting the stability of the system. Utility Model Content

[0003] Based on this, it is necessary to provide a more stable pellet grill control circuit and a pellet grill.

[0004] In the first aspect, the present application proposes a pellet oven control circuit, comprising: a switching power supply module, wherein the input end of the switching power supply module is used to connect to an AC power supply, and the output end of the switching power supply module is used to output a plurality of DC power supplies of different voltages; a microcontroller, wherein the power supply end of the microcontroller is connected to the output end of the switching power supply module; a DC feeding motor drive module, wherein the power supply end of the DC feeding motor drive module is connected to the output end of the switching power supply module, the speed feedback end of the DC feeding motor drive module is connected to the speed signal receiving end of the microcontroller, the speed control end of the DC feeding motor drive module is connected to the speed signal output end of the microcontroller, and the DC feeding motor drive module is used to connect to a DC feeding motor;

[0005] The DC feeding motor drive module includes: a first optocoupler and a second optocoupler, the input end of the first optocoupler is used to connect the DC feeding motor, the output end of the first optocoupler is connected to the speed signal receiving end of the microcontroller, the output end of the second optocoupler is used to connect the DC feeding motor, and the input end of the second optocoupler is connected to the speed signal output end of the microcontroller.

[0006] In one embodiment, the first port of the first optical coupler is connected to the output end of the switching power module through a first resistor, the second port of the first optical coupler is connected to the output end of the switching power module through a second resistor, the second port of the first optical coupler is connected to the feedback output end of the DC feeding motor, the third port of the first optical coupler is connected to the output end of the switching power module through a third resistor, the third port of the first optical coupler is connected to the speed signal receiving end of the microcontroller, the fourth port of the first optical coupler is grounded, and the third port and the fourth port of the first optical coupler are connected in parallel with a first capacitor;

[0007] The first port of the second optocoupler is connected to the output end of the switching power supply module through a fourth resistor, the second port of the second optocoupler is connected to the speed signal output end of the microcontroller, the third port of the second optocoupler is connected to the speed control end of the DC feeding motor through a fifth resistor, the speed control end of the DC feeding motor is connected to the output end of the switching power supply module through a sixth resistor, the fourth port of the second optocoupler is grounded, and the third port and the fourth port of the second optocoupler are connected in parallel with a second capacitor.

[0008] In one of the embodiments, the pellet oven control circuit further includes: a meat probe temperature detection module, wherein the power supply end of the meat probe temperature detection module is connected to the output end of the switching power supply module, the temperature feedback end of the meat probe temperature detection module is connected to the temperature signal receiving end of the microcontroller, and the meat probe temperature detection module is used to connect the meat probe;

[0009] The meat probe temperature detection module includes: a seventh resistor and an eighth resistor, one end of the seventh resistor is connected to the output end of the switching power supply module, the other end of the seventh resistor is connected to the meat probe, one end of the eighth resistor is connected to the meat probe, and the other end of the eighth resistor is connected to the temperature signal receiving end of the microcontroller.

[0010] In one embodiment, the pellet oven control circuit further includes: a fuel quantity detection module, wherein the infrared signal feedback end of the fuel quantity detection module is connected to the infrared signal receiving end of the microcontroller, the infrared signal control end of the fuel quantity detection module is connected to the infrared signal output end of the microcontroller, and the fuel quantity detection module is used to connect to the infrared sensor;

[0011] The fuel quantity detection module includes: a ninth resistor and a tenth resistor, one end of the ninth resistor is used to connect to the infrared sensor, and the other end of the ninth resistor is connected to the infrared signal receiving end of the microcontroller, one end of the tenth resistor is used to connect to the infrared sensor, and the other end of the tenth resistor is connected to the infrared signal output end of the microcontroller.

[0012] In one embodiment, the pellet oven control circuit further includes: a box temperature detection module, a box signal feedback end of the box temperature detection module is connected to the box signal receiving end of the microcontroller, and the box temperature detection module is used to connect to the temperature sensor;

[0013] The cabinet temperature detection module includes: an eleventh resistor and a twelfth resistor, one end of the eleventh resistor is connected to the temperature sensor, the other end of the eleventh resistor is connected to the cabinet signal receiving end of the microcontroller, one end of the twelfth resistor is connected to the temperature sensor, and the other end of the twelfth resistor is grounded.

[0014] In one embodiment, the pellet oven control circuit further includes: a fan motor drive module, the power supply end of the fan motor drive module is connected to the output end of the switch power supply module, the motor control end of the fan motor drive module is connected to the motor signal output end of the microcontroller, and the fan motor drive module is used to connect the fan motor;

[0015] The fan motor drive module includes: a first relay and a first transistor, the first control end of the first relay is connected to the output end of the switching power supply module, the second control end of the first relay is connected to the collector of the first transistor, the base of the first transistor is connected to the motor signal output end of the microcontroller, the emitter of the first transistor is grounded, and the normally open contact of the first relay is used to connect the fan motor.

[0016] In one embodiment, the pellet oven control circuit further includes: an ignition rod driving module, the power supply end of the ignition rod driving module is connected to the output end of the switching power supply module, the ignition rod control end of the ignition rod driving module is connected to the ignition rod signal output end of the microcontroller, and the ignition rod driving module is used to connect the ignition rod;

[0017] The ignition stick driving module includes: a second relay and a second transistor, the first control end of the second relay is connected to the output end of the switching power supply module, the second control end of the second relay is connected to the collector of the second transistor, the base of the second transistor is connected to the ignition stick signal output end of the microcontroller, the emitter of the second transistor is grounded, and the normally open contact of the second relay is used to connect the ignition stick.

[0018] In one embodiment, the pellet oven control circuit further includes: a buzzer module, the power supply end of the buzzer module is connected to the output end of the switching power supply module, the buzzer control end of the buzzer module is connected to the buzzer signal output end of the microcontroller, and the buzzer module is used to connect a buzzer;

[0019] The buzzer module includes: a thirteenth resistor and a third transistor, one end of the thirteenth resistor is connected to the output end of the switching power supply module, the other end of the thirteenth resistor is connected to the collector of the third transistor, the thirteenth resistor is used to be connected in parallel with the buzzer, the base of the third transistor is connected to the buzzer signal output end of the microcontroller, and the emitter of the third transistor is grounded.

[0020] In one embodiment, the pellet oven control circuit further includes: a display module, wherein the power supply end of the display module is connected to the output end of the switching power supply module, and the display signal communication end of the display module is connected to the display signal output end of the microcontroller.

[0021] In a second aspect, the present application further proposes a pellet grill, comprising the pellet grill control circuit described in the embodiment of the first aspect.

[0022] The above-mentioned pellet oven control circuit and pellet oven, by setting the first optocoupler and the second optocoupler in the DC feeding motor drive module, isolate the signal between the DC feeding motor and the microcontroller, prevent the DC motor signal and the controller signal from interfering with each other, and improve the stability of the pellet oven control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A block diagram of a pellet oven control circuit in one embodiment;

[0025] Figure 2 is a circuit diagram of a DC feeding motor driving module in one embodiment;

[0026] FIG3 is a circuit diagram of a microcontroller in one embodiment;

[0027] FIG4 is a block diagram of a pellet oven control circuit in another embodiment;

[0028] FIG5 is a circuit diagram of a meat probe temperature detection module in one embodiment;

[0029] FIG6 is a circuit diagram of a fuel quantity detection module in one embodiment;

[0030] FIG7 is a circuit diagram of a box temperature detection module in one embodiment;

[0031] FIG8 is a circuit diagram of a fan motor drive module in one embodiment;

[0032] FIG9 is a circuit diagram of an ignition rod driving module in one embodiment;

[0033] FIG10 is a circuit diagram of a buzzer module in one embodiment;

[0034] FIG11 is a circuit diagram of a display module in one embodiment;

[0035] FIG. 12 is a circuit diagram of a switching power supply module in one embodiment.

[0036] Description of reference numerals:

[0037] Switching power supply module 110, microcontroller 120, DC feeding motor driving module 130, meat probe temperature detection module 140, fuel quantity detection module 150, box temperature detection module 160, fan motor driving module 170, ignition rod driving module 180, buzzer module 190, display module 200, speed signal receiving terminal 121, speed signal output terminal 122, temperature signal receiving terminal 123, infrared signal receiving terminal 124, infrared signal output terminal 125, box signal receiving terminal 126, motor signal output terminal 127, ignition rod signal output terminal 128, buzzer signal output terminal 129, display signal output terminal 102, speed feedback terminal 131, speed control terminal 132, temperature feedback terminal 141, infrared signal feedback terminal 151, infrared signal control terminal 152, box signal feedback terminal 161, motor control terminal 171, ignition rod control terminal 181, buzzer control terminal 191, display signal communication terminal 201. DETAILED DESCRIPTION

[0038] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0040] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor R1 may be referred to as a second resistor R2, and similarly, a second resistor R2 may be referred to as a first resistor R1. Both the first resistor R1 and the second resistor R2 are resistors, but they are not the same resistor.

[0041] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0042] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0043] In one embodiment, Figure 1 As shown, a pellet oven control circuit is proposed, including: a switching power supply module 110, a microcontroller 120 and a DC feeding motor drive module 130, the input end of the switching power supply module 110 is used to connect to an AC power supply, the output end of the switching power supply module 110 is used to output a plurality of DC power supplies of different voltages, the power supply end of the microcontroller 120 is connected to the output end of the switching power supply module 110, the power supply end of the DC feeding motor drive module 130 is connected to the output end of the switching power supply module 110, the speed feedback end 131 of the DC feeding motor drive module 130 is connected to the speed signal receiving end 121 of the microcontroller 120, the speed control end 132 of the DC feeding motor drive module 130 is connected to the speed signal output end 122 of the microcontroller 120, and the DC feeding motor drive module 130 is used to connect to a DC feeding motor.

[0044] Specifically, the switching power supply module 110 in this embodiment is used to connect an AC power supply (such as a mains power supply), and then convert the AC power supply into a DC power supply of various voltages through rectification, filtering, and voltage reduction, and output the DC power supply from the output end of the switching power supply module 110. The DC voltage output by the switching power supply module 110 can be 24V, 15V, 12V, 5V, etc., and the functional modules in the pellet oven control circuit can choose to use a DC power supply of corresponding size as needed. The speed feedback end 131 of the DC feeding motor drive module 130 is used to output a motor speed signal. After the speed signal receiving end 121 of the microcontroller 120 receives the motor speed signal, it processes the signal to determine the current speed of the DC feeding motor. When the microcontroller 120 calculates through the built-in control algorithm that the speed of the DC feeding motor needs to be adjusted, the microcontroller 120 outputs a speed control signal through the speed signal output terminal 122. After the speed control terminal 132 of the DC feeding motor drive module 130 receives the speed control signal, it will adjust the current speed of the DC feeding motor, thereby completing the speed control of the DC feeding motor. The DC feeding motor feeds materials into the furnace cavity at different speeds, thereby completing the temperature control in the furnace cavity.

[0045] In one embodiment, Figure 2 As shown in Figure 3, the DC feeding motor drive module 130 includes: a first optocoupler U1 and a second optocoupler U2, the input end of the first optocoupler U1 is used to connect to the DC feeding motor, the output end of the first optocoupler U1 is connected to the speed signal receiving end 121 of the microcontroller 120, the output end of the second optocoupler U2 is used to connect to the DC feeding motor, and the input end of the second optocoupler U2 is connected to the speed signal output end 122 of the microcontroller 120.

[0046] Specifically, the first connection port CN1 is used to connect the DC feeding motor, and the pins 1 and 2 of the first optical coupler U1 are input terminals, which are connected to the DC feeding motor through the first connection port CN1, and the pins 3 and 4 of the first optical coupler U1 are output terminals, which are connected to the speed signal receiving terminal 121 of the microcontroller 120, that is, pin 4 of the chip U3. The pins 1 and 2 of the second optical coupler U2 are input terminals, which are connected to the speed signal output terminal 122 of the microcontroller 120, that is, pin 5 of the chip U3, and the pins 3 and 4 of the second optical coupler U2 are output terminals, which are connected to the DC feeding motor through the first connection port CN1. I_FG is the speed feedback terminal 131 of the DC feeding motor drive module 130, and O_SP is the speed control terminal 132 of the DC feeding motor drive module 130. This embodiment sets a first optocoupler U1 and a second optocoupler U2 in the DC feeding motor drive module 130 to isolate the signal between the DC feeding motor and the microcontroller 120, thereby preventing the DC motor signal and the controller signal from interfering with each other, thereby improving the stability of the pellet oven control circuit.

[0047] In one embodiment, Figure 2As shown, the first port (pin 1) of the first optocoupler U1 is connected to the output end of the switching power module 110 through the first resistor R1, the second port (pin 2) of the first optocoupler U1 is connected to the output end of the switching power module 110 through the second resistor R2, the second port (pin 2) of the first optocoupler U1 is connected to the feedback output end of the DC feeding motor, the third port (pin 3) of the first optocoupler U1 is connected to the output end of the switching power module 110 through the third resistor R3, the third port (pin 3) of the first optocoupler U1 is connected to the speed signal receiving end 121 of the microcontroller 120, the fourth port (pin 4) of the first optocoupler U1 is grounded, and the third port (pin 3) and the fourth port (pin 4) of the first optocoupler U1 are connected in parallel with the first capacitor C1. The first port (pin 1) of the second optical coupler U2 is connected to the output end of the switching power module 110 through the fourth resistor R4, the second port (pin 2) of the second optical coupler U2 is connected to the speed signal output end 122 of the microcontroller 120, the third port (pin 3) of the second optical coupler U2 is connected to the speed control end of the DC feeding motor through the fifth resistor R5, the speed control end of the DC feeding motor is connected to the output end of the switching power module 110 through the sixth resistor R6, the fourth port (pin 4) of the second optical coupler U2 is grounded, and the third port (pin 3) and the fourth port (pin 4) of the second optical coupler U2 are connected in parallel with the second capacitor C2. Through the above circuit elements, the DC feeding motor drive module 130 can be completely formed, and the microcontroller 120 can output a speed control signal according to the motor speed signal, thereby adjusting the current speed of the DC feeding motor.

[0048] In one embodiment, as shown in FIG4 , the pellet oven control circuit further includes: a meat probe temperature detection module 140, the power supply end of the meat probe temperature detection module 140 is connected to the output end of the switch power module 110, the temperature feedback end 141 of the meat probe temperature detection module 140 is connected to the temperature signal receiving end 123 of the microcontroller 120, and the meat probe temperature detection module 140 is used to connect the meat probe. Specifically, the meat probe can be made of a thermistor, and its resistance value will change with the change of temperature. After the meat probe temperature detection module 140 detects the corresponding resistance value change, the microcontroller 120 can obtain the corresponding meat probe temperature.

[0049] In one embodiment, as shown in FIG5 , the meat probe temperature detection module 140 includes: a seventh resistor R7 and an eighth resistor R8, one end of the seventh resistor R7 is connected to the output end of the switch power module 110, the other end of the seventh resistor R7 is connected to the meat probe, one end of the eighth resistor R8 is connected to the meat probe, and the other end of the eighth resistor R8 is connected to the temperature signal receiving end 123 of the microcontroller 120. Specifically, pin 1, pin 2, and pin 3 of the first connector J1 are used to connect a meat probe respectively, MEAT-1, MEAT-2, and MEAT-3 are the temperature feedback ends 141 of the meat probe temperature detection module 140, and correspondingly, pin 10, pin 12, and pin 6 of the chip U3 are the temperature signal receiving end 123 of the microcontroller 120. By setting the resistance values ​​of the seventh resistor R7 and the eighth resistor R8, the resistance value of the meat probe is sampled, thereby determining the temperature of the corresponding meat probe.

[0050] In one embodiment, as shown in FIG4 , the pellet oven control circuit further includes: a fuel quantity detection module 150, an infrared signal feedback terminal 151 of the fuel quantity detection module 150 is connected to the infrared signal receiving terminal 124 of the microcontroller 120, an infrared signal control terminal 152 of the fuel quantity detection module 150 is connected to the infrared signal output terminal 125 of the microcontroller 120, and the fuel quantity detection module 150 is used to connect to an infrared sensor. Specifically, the infrared sensor is arranged at the exit position of the storage bin, when there is fuel in the storage bin, the fuel will block the infrared sensor, when the fuel in the storage bin is exhausted, there is no fuel to block the infrared sensor, thereby completing the detection of the fuel quantity.

[0051] In one embodiment, as shown in FIG6 , the fuel quantity detection module 150 includes: a ninth resistor R9 and a tenth resistor R10, one end of the ninth resistor R9 is used to connect to the infrared sensor, and the other end of the ninth resistor R9 is connected to the infrared signal receiving end 124 of the microcontroller 120, one end of the tenth resistor R10 is used to connect to the infrared sensor, and the other end of the tenth resistor R10 is connected to the infrared signal output end 125 of the microcontroller 120. Specifically, the second connector J2 is used to connect to the infrared sensor, the pin 1 of the second connector J2 is used to power the infrared sensor, IR_Recv is the infrared signal feedback end 151 of the fuel quantity detection module 150, IR_Send is the infrared signal control end 152 of the fuel quantity detection module 150, the pin 14 of the chip U3 is the infrared signal receiving end 124 of the microcontroller 120, and the pin 13 of the chip U3 is the infrared signal output end 125 of the microcontroller 120.

[0052] In one embodiment, as shown in FIG4 , the pellet oven control circuit further includes: a box temperature detection module 160, a box signal feedback terminal 161 of the box temperature detection module 160 is connected to the box signal receiving terminal 126 of the microcontroller 120, and the box temperature detection module 160 is used to connect to a temperature sensor. Specifically, by setting a temperature sensor in the combustion box of the pellet oven, the combustion temperature of the pellet oven can be monitored.

[0053] In one embodiment, as shown in FIG7 , the box temperature detection module 160 includes: an eleventh resistor R11 and a twelfth resistor R12, one end of the eleventh resistor R11 is connected to the temperature sensor, the other end of the eleventh resistor R11 is connected to the box signal receiving end 126 of the microcontroller 120, one end of the twelfth resistor R12 is connected to the temperature sensor, and the other end of the twelfth resistor R12 is grounded. Specifically, the third connector J3 is used to connect the temperature sensor, and the pin 1 of the third connector J3 is used to supply power to the temperature sensor. BODY-1 is the box signal feedback end 161 of the box temperature detection module 160, and the pin 15 of the chip U3 is the box signal receiving end 126 of the microcontroller 120. By setting the resistance values ​​of the eleventh resistor R11 and the twelfth resistor R12, the detection of the box temperature signal collected by the temperature sensor can be completed.

[0054] In one embodiment, as shown in FIG4 , the pellet oven control circuit further includes: a fan motor drive module 170, the power supply end of the fan motor drive module 170 is connected to the output end of the switch power supply module 110, the motor control end 171 of the fan motor drive module 170 is connected to the motor signal output end 127 of the microcontroller 120, and the fan motor drive module 170 is used to connect the fan motor. Specifically, by setting the fan motor drive module 170, the opening and closing of the fan motor can be controlled. When it is necessary to supply air to the fuel furnace, the fan motor can be turned on to increase the combustion power.

[0055] In one embodiment, as shown in FIG8 , the fan motor driving module 170 includes: a first relay PLY1 and a first transistor Q1, wherein the first control end of the first relay PLY1 is connected to the output end of the switching power supply module 110, the second control end of the first relay PLY1 is connected to the collector of the first transistor Q1, the base of the first transistor Q1 is connected to the motor signal output end 127 of the microcontroller 120, the emitter of the first transistor Q1 is grounded, and the normally open contact of the first relay PLY1 is used to connect the fan motor. Specifically, the second connection port CN2 is used to connect the fan motor, the pin 1 of the second connection port CN2 is used to connect the neutral line, and the pin 3 of the second connection port CN2 is connected to the live line through the normally open contact of the first relay PLY1. R_Fan is the motor control end 171 of the fan motor driving module 170, and the pin 2 of the chip U3 is the motor signal output end 127 of the microcontroller 120. When the microcontroller 120 needs to control the fan motor to turn on, the microcontroller 120 inputs a high level to the base of the first transistor Q1, and the first transistor Q1 is turned on. At this time, the coil of the first relay PLY1 is energized, causing the normally open contact of the first relay PLY1 to close, thereby turning on the fan motor.

[0056] In one embodiment, as shown in FIG4 , the pellet oven control circuit further includes: an ignition rod driving module 180, the power supply end of the ignition rod driving module 180 is connected to the output end of the switching power supply module 110, the ignition rod control end 181 of the ignition rod driving module 180 is connected to the ignition rod signal output end 128 of the microcontroller 120, and the ignition rod driving module 180 is used to connect the ignition rod. Specifically, by setting the ignition rod driving module 180, when the user needs to ignite, the microcontroller 120 sends an ignition signal to the ignition rod driving module 180, and the ignition rod driving module 180 will drive the ignition rod to complete the ignition.

[0057] In one embodiment, as shown in FIG9 , the ignition rod driving module 180 includes: a second relay PLY2 and a second transistor Q2, the first control end of the second relay PLY2 is connected to the output end of the switching power supply module 110, the second control end of the second relay PLY2 is connected to the collector of the second transistor Q2, the base of the second transistor Q2 is connected to the ignition rod signal output end 128 of the microcontroller 120, the emitter of the second transistor Q2 is grounded, and the normally open contact of the second relay PLY2 is used to connect the ignition rod. Specifically, the third connection port CN3 is used to connect the ignition rod, the pin 1 of the third connection port CN3 is used to connect the neutral line, and the pin 3 of the third connection port CN3 is connected to the fire line through the normally open contact of the second relay PLY2. R_Fire is the ignition rod control end 181 of the ignition rod driving module 180, and the pin 3 of the chip U3 is the ignition rod signal output end 128 of the microcontroller 120. When the microcontroller 120 needs to control the ignition rod to work, the microcontroller 120 inputs a high level to the base of the second transistor Q2, and the second transistor Q2 will be turned on. At this time, the coil of the second relay PLY2 is energized, causing the normally open contact of the second relay PLY2 to close, thereby turning on the ignition rod.

[0058] In one embodiment, as shown in FIG4 , the pellet oven control circuit further includes: a buzzer module 190, the power supply end of the buzzer module 190 is connected to the output end of the switch power module 110, the buzzer control end 191 of the buzzer module 190 is connected to the buzzer signal output end 129 of the microcontroller 120, and the buzzer module 190 is used to connect a buzzer. Specifically, by setting the buzzer module 190, when a key sound or an alarm sound is required, a corresponding sound can be emitted by the buzzer for a sound prompt.

[0059] In one embodiment, as shown in FIG10 , the buzzer module 190 includes: a thirteenth resistor R13 and a third transistor Q3, one end of the thirteenth resistor R13 is connected to the output end of the switching power supply module 110, the other end of the thirteenth resistor R13 is connected to the collector of the third transistor Q3, the thirteenth resistor R13 is used to be connected in parallel with the buzzer, the base of the third transistor Q3 is connected to the buzzer signal output end 129 of the microcontroller 120, and the emitter of the third transistor Q3 is grounded. Specifically, BUZ is the buzzer control end 191 of the buzzer module 190, and the pin 8 of the chip U3 is the buzzer signal output end 129 of the microcontroller 120. When the microcontroller 120 needs the buzzer to sound, the microcontroller 120 outputs a high level to the base of the third transistor Q3, the third transistor Q3 will be turned on, and the buzzer will be powered and sound.

[0060] In one embodiment, as shown in FIG4 , the pellet oven control circuit further includes: a display module 200, a power supply end of the display module 200 is connected to the output end of the switch power module 110, and a display signal communication end 201 of the display module 200 is connected to the display signal output end 102 of the microcontroller 120. Specifically, by setting the display module 200, the microcontroller 120 can display the detected box temperature, feed motor speed, fuel quantity status, meat probe temperature, fan motor status, ignition rod status and other information on the display screen for users to view.

[0061] In one embodiment, as shown in FIG. 11 , the fourth connector J4 is used to connect a display screen, the TXD and RXD ports are the display signal communication terminals 201 of the display module 200, and the pins 9 and 11 of the chip U3 are the display signal output terminals 102 of the microcontroller 120. Through this circuit, the display signal communication between the display screen and the microcontroller 120 is completed.

[0062] In one embodiment, as shown in FIG. 12 , it is a circuit diagram of a switching power supply module 110 in one embodiment, and the DC voltage outputted by the switching power supply module 110 is 24V, 18V, 15V, 12V, 5V, etc.

[0063] In one embodiment, the present application further proposes a pellet oven, including the pellet oven control circuit in the above embodiment. The above pellet oven, by setting a first optical coupler U1 and a second optical coupler U2 in the DC feeding motor drive module 130, isolates the signal between the DC feeding motor and the microcontroller 120, prevents the DC motor signal from interfering with the controller signal, and improves the stability of the pellet oven control circuit.

[0064] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "specific examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A pellet oven control circuit, characterized in that: include: A switching power supply module (110), wherein an input end of the switching power supply module (110) is used to connect to an AC power supply, and an output end of the switching power supply module (110) is used to output DC power supplies of multiple different voltages; A microcontroller (120), wherein a power supply terminal of the microcontroller (120) is connected to an output terminal of the switching power supply module (110); A DC feeding motor drive module (130), wherein a power supply end of the DC feeding motor drive module (130) is connected to an output end of the switching power supply module (110), a speed feedback end (131) of the DC feeding motor drive module (130) is connected to a speed signal receiving end (121) of the microcontroller (120), and a speed control end (132) of the DC feeding motor drive module (130) is connected to a speed signal output end (122) of the microcontroller (120); the DC feeding motor drive module (130) is used to connect to a DC feeding motor; The DC feeding motor drive module (130) comprises: a first optical coupler (U1) and a second optical coupler (U2), wherein the input end of the first optical coupler (U1) is used to connect to the DC feeding motor, the output end of the first optical coupler (U1) is connected to a speed signal receiving end (121) of the microcontroller (120), the output end of the second optical coupler (U2) is used to connect to the DC feeding motor, and the input end of the second optical coupler (U2) is connected to a speed signal output end (122) of the microcontroller (120).

2. The pellet oven control circuit according to claim 1, characterized in that: The first port of the first optical coupler (U1) is connected to the output end of the switching power module (110) via a first resistor (R1), the second port of the first optical coupler (U1) is connected to the output end of the switching power module (110) via a second resistor (R2), the second port of the first optical coupler (U1) is connected to the feedback output end of the DC feeding motor, the third port of the first optical coupler (U1) is connected to the output end of the switching power module (110) via a third resistor (R3), the third port of the first optical coupler (U1) is connected to the speed signal receiving end (121) of the microcontroller (120), the fourth port of the first optical coupler (U1) is grounded, and the third port and the fourth port of the first optical coupler (U1) are connected in parallel with a first capacitor (C1); The first port of the second optical coupler (U2) is connected to the output end of the switching power module (110) via a fourth resistor (R4), the second port of the second optical coupler (U2) is connected to the speed signal output end (122) of the microcontroller (120), the third port of the second optical coupler (U2) is connected to the speed control end of the DC feeding motor via a fifth resistor (R5), the speed control end of the DC feeding motor is connected to the output end of the switching power module (110) via a sixth resistor (R6), the fourth port of the second optical coupler (U2) is grounded, and the third port and the fourth port of the second optical coupler (U2) are connected in parallel with a second capacitor (C2).

3. The pellet oven control circuit according to claim 1, characterized in that: Also includes: a meat probe temperature detection module (140), wherein a power supply end of the meat probe temperature detection module (140) is connected to an output end of the switch power supply module (110), a temperature feedback end (141) of the meat probe temperature detection module (140) is connected to a temperature signal receiving end (123) of the microcontroller (120), and the meat probe temperature detection module (140) is used to connect a meat probe; The meat probe temperature detection module (140) comprises: a seventh resistor (R7) and an eighth resistor (R8), one end of the seventh resistor (R7) is connected to the output end of the switch power supply module (110), the other end of the seventh resistor (R7) is connected to the meat probe, one end of the eighth resistor (R8) is connected to the meat probe, and the other end of the eighth resistor (R8) is connected to the temperature signal receiving end (123) of the microcontroller (120).

4. The pellet oven control circuit according to claim 1, characterized in that: Also includes: A fuel quantity detection module (150), wherein an infrared signal feedback end (151) of the fuel quantity detection module (150) is connected to an infrared signal receiving end (124) of the microcontroller (120), an infrared signal control end (152) of the fuel quantity detection module (150) is connected to an infrared signal output end (125) of the microcontroller (120), and the fuel quantity detection module (150) is used to connect to an infrared sensor; The fuel quantity detection module (150) comprises: a ninth resistor (R9) and a tenth resistor (R10), one end of the ninth resistor (R9) being used to connect to the infrared sensor, and the other end of the ninth resistor (R9) being connected to the infrared signal receiving end (124) of the microcontroller (120), one end of the tenth resistor (R10) being used to connect to the infrared sensor, and the other end of the tenth resistor (R10) being connected to the infrared signal output end (125) of the microcontroller (120).

5. The pellet oven control circuit according to claim 1, characterized in that: Also includes: A box temperature detection module (160), wherein a box signal feedback terminal (161) of the box temperature detection module (160) is connected to a box signal receiving terminal (126) of the microcontroller (120), and the box temperature detection module (160) is used to connect to a temperature sensor; The box temperature detection module (160) comprises: an eleventh resistor (R11) and a twelfth resistor (R12), one end of the eleventh resistor (R11) is connected to the temperature sensor, the other end of the eleventh resistor (R11) is connected to the box signal receiving end (126) of the microcontroller (120), one end of the twelfth resistor (R12) is connected to the temperature sensor, and the other end of the twelfth resistor (R12) is grounded.

6. The pellet oven control circuit according to claim 1, characterized in that: Also includes: A fan motor drive module (170), wherein a power supply end of the fan motor drive module (170) is connected to an output end of the switch power supply module (110), a motor control end (171) of the fan motor drive module (170) is connected to a motor signal output end (127) of the microcontroller (120), and the fan motor drive module (170) is used to connect to a fan motor; The fan motor drive module (170) comprises: a first relay (PLY1) and a first transistor (Q1), wherein a first control end of the first relay (PLY1) is connected to an output end of the switch power supply module (110), a second control end of the first relay (PLY1) is connected to a collector of the first transistor (Q1), a base of the first transistor (Q1) is connected to a motor signal output end (127) of the microcontroller (120), an emitter of the first transistor (Q1) is grounded, and a normally open contact of the first relay (PLY1) is used to connect to the fan motor.

7. The pellet oven control circuit according to claim 1, characterized in that: Also includes: An ignition stick driving module (180), wherein a power supply end of the ignition stick driving module (180) is connected to an output end of the switch power supply module (110), an ignition stick control end (181) of the ignition stick driving module (180) is connected to an ignition stick signal output end (128) of the microcontroller (120), and the ignition stick driving module (180) is used to connect to an ignition stick; The ignition stick driving module (180) comprises: a second relay (PLY2) and a second transistor (Q2), wherein the first control end of the second relay (PLY2) is connected to the output end of the switching power supply module (110), the second control end of the second relay (PLY2) is connected to the collector of the second transistor (Q2), the base of the second transistor (Q2) is connected to the ignition stick signal output end (128) of the microcontroller (120), the emitter of the second transistor (Q2) is grounded, and the normally open contact of the second relay (PLY2) is used to connect the ignition stick.

8. The pellet oven control circuit according to claim 1, characterized in that: Also includes: A buzzer module (190), wherein a power supply end of the buzzer module (190) is connected to an output end of the switch power supply module (110), a buzzer control end (191) of the buzzer module (190) is connected to a buzzer signal output end (129) of the microcontroller (120), and the buzzer module (190) is used to connect a buzzer; The buzzer module (190) comprises: a thirteenth resistor (R13) and a third transistor (Q3), one end of the thirteenth resistor (R13) is connected to the output end of the switch power module (110), the other end of the thirteenth resistor (R13) is connected to the collector of the third transistor (Q3), the thirteenth resistor (R13) is used to be connected in parallel with the buzzer, the base of the third transistor (Q3) is connected to the buzzer signal output end (129) of the microcontroller (120), and the emitter of the third transistor (Q3) is grounded.

9. The pellet oven control circuit according to any one of claims 1 to 8, characterized in that: Also includes: A display module (200), wherein a power supply end of the display module (200) is connected to an output end of the switch power supply module (110), and a display signal communication end (201) of the display module (200) is connected to a display signal output end (102) of the microcontroller (120).

10. A pellet oven, characterized in that: A pellet oven control circuit comprising the control circuit of any one of claims 1 to 9.

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