A steam oven control circuit

Abstract

The utility model discloses a kind of steam oven control circuit, the control single-way is configured with power module, main control module, silicon-controlled rectifier drive module, zero-crossing detection module, temperature detection module, motor drive module and valve drive module, wherein main control module according to the temperature data of temperature detection module transmission in oven, the heating power of heating tube in oven is controlled by the cooperation setting of silicon-controlled rectifier drive module and zero-crossing detection module, improve the experience in the cooking process of user, the safety of oven use process can also be improved by still.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and more specifically to a steam oven control circuit. Background Technology

[0002] A steam oven is a type of kitchen appliance that primarily uses a combination of baking and steam generation to achieve a crispy exterior and tender interior for food. As consumers increasingly demand higher quality cooking, steam ovens, through technological integration, utilize steam to retain the moisture and nutrients of food while baking to give it a caramelized crust, leading to a wider market demand.

[0003] Existing steam ovens have structural limitations, with fixed parameters for the heating element power used in baking and steam generators. This limitation results in a poor user experience when cooking various food recipes. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a steam oven control circuit.

[0005] The technical solution adopted by this utility model to solve the problem is:

[0006] A steam oven control circuit includes a power supply module, a main control module, a thyristor drive module, a zero-crossing detection module, a temperature detection module, a motor drive module, and a valve drive module.

[0007] The power supply module is connected to the main control module, the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module, respectively.

[0008] The main control module is connected to the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module, respectively.

[0009] As a further improvement to the above technical solution, the power supply module includes a switching power supply unit and a step-down unit. The switching power supply unit is connected to the step-down unit, and the main control module, the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module are connected to either the switching power supply unit or the step-down unit.

[0010] As a further improvement to the above technical solution, the zero-crossing detection module includes a live wire connection terminal, a neutral wire connection terminal, an optocoupler U1, a diode D1, a diode D2, a resistor R1, a resistor R2, a resistor R3, and a capacitor C1, and the main control module is configured with a first connection terminal.

[0011] The live wire connection terminal is connected to the positive terminal of diode D1. The negative terminal of diode D1 is connected to the negative terminal of diode D2 through resistor R1. The positive terminal of diode D2 is connected to the neutral wire connection terminal. The negative terminal of diode D2 is connected to the anode of optocoupler U1. The positive terminal of diode D2 is connected to the cathode of optocoupler U1. The collector of optocoupler U1 is connected to the step-down unit through resistor R2. The collector of optocoupler U1 is connected to the first connection terminal of the main control module through resistor R3. The first connection terminal of the main control module is connected to ground through capacitor C1. The emitter of optocoupler U1 is connected to ground.

[0012] As a further improvement to the above technical solution, the temperature detection module includes a sensor interface, resistors R4 and R5, capacitor C2 and capacitor C3, the sensor interface is configured with a first pin and a second pin, and the main control module is configured with a second connection terminal.

[0013] The first pin of the sensor interface is connected to the step-down unit. The second pin of the sensor interface is connected to ground through the capacitor C3. The resistor R5 is connected in parallel with the capacitor C3. The second pin of the sensor interface is connected to the second connection terminal of the main control module through the resistor R4. The second connection terminal of the main control module is connected to ground through the capacitor C2.

[0014] As a further improvement to the above technical solution, the motor drive module includes a motor interface, a transistor Q1, a switching transistor QA, resistors R6, R7, R8, and R9. The motor interface is configured with a first pin, a second pin, a third pin, a fourth pin, and a fifth pin. The main control module is configured with a third connection terminal, a fourth connection terminal, a fifth connection terminal, and a sixth connection terminal.

[0015] The third connection terminal of the main control module is connected to the base of transistor Q1 through resistor R6. The emitter of transistor Q1 is connected to ground. The two ends of resistor R7 are connected to the base and emitter of transistor Q1 respectively. The collector of transistor Q1 is connected to the gate of switching transistor QA through resistor R8. The source of switching transistor QA is connected to the switching power supply unit. The two ends of resistor R9 are connected to the gate and source of switching transistor QA respectively. The drain of switching transistor QA is connected to the first pin of the motor interface. The second pin of the motor interface is connected to ground. The third pin of the motor interface is connected to the fourth connection terminal of the main control module. The fourth pin of the motor interface is connected to the fifth connection terminal of the main control module. The fifth pin of the motor interface is connected to the sixth connection terminal of the main control module.

[0016] As a further improvement to the above technical solution, the thyristor drive module includes a heating tube port, a mains input port, a photoelectric bidirectional thyristor U2, a bidirectional thyristor U3, a resistor R10, a resistor R11, a resistor R12, and a capacitor C4. The main control module is equipped with a seventh connection terminal.

[0017] The seventh connection terminal of the main control module is connected to the cathode of the photoelectric bidirectional thyristor U2 through the resistor R10. The anode of the photoelectric bidirectional thyristor U2 is connected to the step-down unit. One main electrode of the photoelectric bidirectional thyristor U2 is connected to one main electrode of the bidirectional thyristor U3 and the mains input port through the resistor R11. The other main electrode of the photoelectric bidirectional thyristor U2 is connected to the gate of the bidirectional thyristor U3. The other main electrode of the bidirectional thyristor U3 is connected to the heating tube port. The capacitor C4 and the resistor R12 are connected in series between the two main electrodes of the bidirectional thyristor U3.

[0018] As a further improvement to the above technical solution, the thyristor drive module also includes resistors R13, R14, R15, R16, R17, and R18, capacitors C5 and C6, transistors Q2, Q3, and Q4, diodes D3, D4, and D5, and relay J1. The main control module is configured with an eighth connection terminal.

[0019] The eighth connection terminal of the main control module is connected to the control electrode of diode D3 via resistor R13 and capacitor C5. The cathode of diode D3 is connected to the anode of diode D3 via capacitor C6. Resistor R14 is connected in parallel with capacitor C6. The cathode of diode D3 is connected to the base of transistor Q2 via resistor R15. The emitter of transistor Q2 is connected to ground. The cathode of diode D3 is connected to the base of transistor Q3 via resistor R16. The emitter of transistor Q3 is connected to the collector of transistor Q2. The collector of Q3 is connected to the anode of diode D5 and the cathode of diode D4. The cathode of diode D5 is connected to the switching power supply unit. The anode of diode D4 is connected to the base of transistor Q4 through resistor R17. The emitter of transistor Q4 is connected to the step-down unit. The two ends of resistor R18 are connected to the base and emitter of transistor Q4 respectively. The collector of transistor Q4 is connected to the anode of photoelectric bidirectional thyristor U2. The two ends of the input circuit of relay J1 are connected to the anode and cathode of diode D5 respectively.

[0020] As a further improvement to the above technical solution, this control circuit also includes a fault alarm module, the main control module is connected to the fault alarm module, and the step-down unit or the switching power supply unit is connected to the fault alarm module.

[0021] The beneficial effects of this utility model are as follows: This technical solution is equipped with a power supply module, a main control module, a thyristor drive module, a zero-crossing detection module, a temperature detection module, a motor drive module, and a valve drive module. The main control module, based on the oven temperature data transmitted by the temperature detection module, controls the heating power of the heating element inside the oven through the cooperation of the thyristor drive module and the zero-crossing detection module, thereby improving the user's experience during cooking and enhancing the safety of the oven during use. Attached Figure Description

[0022] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a circuit module framework diagram of this utility model;

[0024] Figure 2 This is the circuit diagram of the zero-crossing detection module in this utility model;

[0025] Figure 3 This is a circuit diagram of the temperature detection module in this utility model;

[0026] Figure 4 This is a circuit diagram of the motor drive module in this utility model;

[0027] Figure 5 This is a circuit diagram of the thyristor drive module in this utility model. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Reference Figures 1 to 5 This application discloses a steam oven control circuit, the first embodiment of which includes a power supply module, a main control module, a thyristor drive module, a zero-crossing detection module, a temperature detection module, a motor drive module, and a valve drive module;

[0033] The power supply module is connected to the main control module, the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module, respectively.

[0034] The main control module is connected to the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module, respectively.

[0035] Specifically, this embodiment includes a power module, a main control module, a thyristor drive module, a zero-crossing detection module, a temperature detection module, a motor drive module, and a valve drive module. The main control module, based on the oven temperature data transmitted by the temperature detection module, controls the heating power of the heating element inside the oven through the cooperation of the thyristor drive module and the zero-crossing detection module, thereby improving the user's cooking experience and enhancing the safety of the oven during use.

[0036] As a further preferred embodiment, in this embodiment, the power supply module includes a switching power supply unit and a step-down unit. The switching power supply unit is used to convert 220V AC mains power into 24V and 12V DC power, and the step-down unit is used to convert 24V DC power into 5V DC power. The switching power supply unit is connected to the step-down unit, and the main control module, the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module are connected to either the switching power supply unit or the step-down unit.

[0037] As a further preferred embodiment, in this embodiment, the zero-crossing detection module includes a live wire connection terminal, a neutral wire connection terminal, an optocoupler U1, a diode D1, a diode D2, a resistor R1, a resistor R2, a resistor R3, and a capacitor C1, and the main control module is configured with a first connection terminal;

[0038] The live wire connection terminal is connected to the positive terminal of diode D1. The negative terminal of diode D1 is connected to the negative terminal of diode D2 through resistor R1. The positive terminal of diode D2 is connected to the neutral wire connection terminal. The negative terminal of diode D2 is connected to the anode of optocoupler U1. The positive terminal of diode D2 is connected to the cathode of optocoupler U1. The collector of optocoupler U1 is connected to the step-down unit through resistor R2. The collector of optocoupler U1 is connected to the first connection terminal of the main control module through resistor R3. The first connection terminal of the main control module is connected to ground through capacitor C1. The emitter of optocoupler U1 is connected to ground.

[0039] As a further preferred embodiment, in this embodiment, the temperature detection module includes a sensor interface, resistors R4 and R5, capacitor C2 and capacitor C3, the sensor interface is configured with a first pin and a second pin, the main control module is configured with a second connection terminal, the sensor interface is used to connect to a temperature sensor, the first pin of the sensor interface is used to supply power to the temperature sensor, and the second pin of the sensor interface is used to receive the input voltage of the temperature sensor.

[0040] The first pin of the sensor interface is connected to the step-down unit. The second pin of the sensor interface is connected to ground through the capacitor C3. The resistor R5 is connected in parallel with the capacitor C3. The second pin of the sensor interface is connected to the second connection terminal of the main control module through the resistor R4. The second connection terminal of the main control module is connected to ground through the capacitor C2.

[0041] As a further preferred embodiment, in this embodiment, the motor drive module includes a motor interface, an NPN transistor Q1, a switching transistor QA, resistors R6, R7, R8, and R9. The motor interface is configured with a first pin, a second pin, a third pin, a fourth pin, and a fifth pin. The main control module is configured with a third connection terminal, a fourth connection terminal, a fifth connection terminal, and a sixth connection terminal. The motor interface is used to connect to a DC water pump motor.

[0042] The third connection terminal of the main control module is connected to the base of transistor Q1 through resistor R6. The emitter of transistor Q1 is connected to ground. The two ends of resistor R7 are connected to the base and emitter of transistor Q1 respectively. The collector of transistor Q1 is connected to the gate of switching transistor QA through resistor R8. The source of switching transistor QA is connected to the switching power supply unit. The two ends of resistor R9 are connected to the gate and source of switching transistor QA respectively. The drain of switching transistor QA is connected to the first pin of the motor interface. The second pin of the motor interface is connected to ground. The third pin of the motor interface is connected to the fourth connection terminal of the main control module. The fourth pin of the motor interface is connected to the fifth connection terminal of the main control module. The fifth pin of the motor interface is connected to the sixth connection terminal of the main control module.

[0043] As a further preferred embodiment, in this embodiment, the thyristor drive module includes a heating tube port, a mains input port, a photoelectric bidirectional thyristor U2, a bidirectional thyristor U3, a resistor R10, a resistor R11, a resistor R12, and a capacitor C4, and the main control module is configured with a seventh connection terminal.

[0044] The seventh connection terminal of the main control module is connected to the cathode of the photoelectric bidirectional thyristor U2 through the resistor R10. The anode of the photoelectric bidirectional thyristor U2 is connected to the step-down unit. One main electrode of the photoelectric bidirectional thyristor U2 is connected to one main electrode of the bidirectional thyristor U3 and the mains input port through the resistor R11. The other main electrode of the photoelectric bidirectional thyristor U2 is connected to the gate of the bidirectional thyristor U3. The other main electrode of the bidirectional thyristor U3 is connected to the heating tube port. The capacitor C4 and the resistor R12 are connected in series between the two main electrodes of the bidirectional thyristor U3.

[0045] As a further preferred embodiment, in this embodiment, the thyristor drive module further includes resistors R13, R14, R15, R16, R17, and R18, capacitors C5 and C6, NPN transistors Q2 and Q3, PNP transistors Q4, diodes D3, D4, and D5, and a relay J1. The main control module is configured with an eighth connection terminal.

[0046] The eighth connection terminal of the main control module is connected to the control electrode of diode D3 via resistor R13 and capacitor C5. The cathode of diode D3 is connected to the anode of diode D3 via capacitor C6. Resistor R14 is connected in parallel with capacitor C6. The cathode of diode D3 is connected to the base of transistor Q2 via resistor R15. The emitter of transistor Q2 is connected to ground. The cathode of diode D3 is connected to the base of transistor Q3 via resistor R16. The emitter of transistor Q3 is connected to the collector of transistor Q2. The collector of transistor Q3 is connected to the diode... The positive terminal of diode D5 is connected to the negative terminal of diode D4. The negative terminal of diode D5 is connected to the switching power supply unit. The positive terminal of diode D4 is connected to the base of transistor Q4 through resistor R17. The emitter of transistor Q4 is connected to the step-down unit. The two ends of resistor R18 are connected to the base and emitter of transistor Q4 respectively. The collector of transistor Q4 is connected to the anode of photoelectric bidirectional thyristor U2. The two ends of the input circuit of relay J1 are connected to the positive and negative terminals of diode D5 respectively. The output circuit of relay J1 is used to realize the input control of the mains input terminal.

[0047] As a further preferred embodiment, this embodiment also includes a fault alarm module, the main control module is connected to the fault alarm module, and the step-down unit or the switching power supply unit is connected to the fault alarm module.

[0048] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A steam oven control circuit, characterized in that: It includes a power supply module, a main control module, a thyristor drive module, a zero-crossing detection module, a temperature detection module, a motor drive module, and a valve drive module; The power supply module is connected to the main control module, the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module, respectively. The main control module is connected to the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module, respectively.

2. The steam oven control circuit according to claim 1, characterized in that: The power module includes a switching power supply unit and a step-down unit. The switching power supply unit is connected to the step-down unit. The main control module, the thyristor drive module, the zero-crossing detection module, the temperature detection module, the motor drive module, and the valve drive module are connected to either the switching power supply unit or the step-down unit.

3. The steam oven control circuit according to claim 2, characterized in that: The zero-crossing detection module includes a live wire connection terminal, a neutral wire connection terminal, an optocoupler U1, a diode D1, a diode D2, a resistor R1, a resistor R2, a resistor R3, and a capacitor C1. The main control module is configured with a first connection terminal. The live wire connection terminal is connected to the positive terminal of diode D1. The negative terminal of diode D1 is connected to the negative terminal of diode D2 through resistor R1. The positive terminal of diode D2 is connected to the neutral wire connection terminal. The negative terminal of diode D2 is connected to the anode of optocoupler U1. The positive terminal of diode D2 is connected to the cathode of optocoupler U1. The collector of optocoupler U1 is connected to the step-down unit through resistor R2. The collector of optocoupler U1 is connected to the first connection terminal of the main control module through resistor R3. The first connection terminal of the main control module is connected to ground through capacitor C1. The emitter of optocoupler U1 is connected to ground.

4. The steam oven control circuit according to claim 2, characterized in that: The temperature detection module includes a sensor interface, resistors R4 and R5, capacitor C2 and capacitor C3. The sensor interface is configured with a first pin and a second pin, and the main control module is configured with a second connection terminal. The first pin of the sensor interface is connected to the step-down unit. The second pin of the sensor interface is connected to ground through the capacitor C3. The resistor R5 is connected in parallel with the capacitor C3. The second pin of the sensor interface is connected to the second connection terminal of the main control module through the resistor R4. The second connection terminal of the main control module is connected to ground through the capacitor C2.

5. A steam oven control circuit according to claim 2, characterized in that: The motor drive module includes a motor interface, a transistor Q1, a switching transistor QA, resistors R6, R7, R8, and R9. The motor interface is configured with a first pin, a second pin, a third pin, a fourth pin, and a fifth pin. The main control module is configured with a third connection terminal, a fourth connection terminal, a fifth connection terminal, and a sixth connection terminal. The third connection terminal of the main control module is connected to the base of transistor Q1 through resistor R6. The emitter of transistor Q1 is connected to ground. The two ends of resistor R7 are connected to the base and emitter of transistor Q1 respectively. The collector of transistor Q1 is connected to the gate of switching transistor QA through resistor R8. The source of switching transistor QA is connected to the switching power supply unit. The two ends of resistor R9 are connected to the gate and source of switching transistor QA respectively. The drain of switching transistor QA is connected to the first pin of the motor interface. The second pin of the motor interface is connected to ground. The third pin of the motor interface is connected to the fourth connection terminal of the main control module. The fourth pin of the motor interface is connected to the fifth connection terminal of the main control module. The fifth pin of the motor interface is connected to the sixth connection terminal of the main control module.

6. A steam oven control circuit according to claim 2, characterized in that: The thyristor drive module includes a heating tube port, a mains input port, a photoelectric bidirectional thyristor U2, a bidirectional thyristor U3, a resistor R10, a resistor R11, a resistor R12, and a capacitor C4. The main control module is equipped with a seventh connection terminal. The seventh connection terminal of the main control module is connected to the cathode of the photoelectric bidirectional thyristor U2 through the resistor R10. The anode of the photoelectric bidirectional thyristor U2 is connected to the step-down unit. One main electrode of the photoelectric bidirectional thyristor U2 is connected to one main electrode of the bidirectional thyristor U3 and the mains input port through the resistor R11. The other main electrode of the photoelectric bidirectional thyristor U2 is connected to the gate of the bidirectional thyristor U3. The other main electrode of the bidirectional thyristor U3 is connected to the heating tube port. The capacitor C4 and the resistor R12 are connected in series between the two main electrodes of the bidirectional thyristor U3.

7. A steam oven control circuit according to claim 6, characterized in that: The thyristor drive module also includes resistors R13, R14, R15, R16, R17, and R18, capacitors C5 and C6, transistors Q2, Q3, and Q4, diodes D3, D4, and D5, and relay J1. The main control module is configured with an eighth connection terminal. The eighth connection terminal of the main control module is connected to the control electrode of diode D3 via resistor R13 and capacitor C5. The cathode of diode D3 is connected to the anode of diode D3 via capacitor C6. Resistor R14 is connected in parallel with capacitor C6. The cathode of diode D3 is connected to the base of transistor Q2 via resistor R15. The emitter of transistor Q2 is connected to ground. The cathode of diode D3 is connected to the base of transistor Q3 via resistor R16. The emitter of transistor Q3 is connected to the collector of transistor Q2. The collector of Q3 is connected to the anode of diode D5 and the cathode of diode D4. The cathode of diode D5 is connected to the switching power supply unit. The anode of diode D4 is connected to the base of transistor Q4 through resistor R17. The emitter of transistor Q4 is connected to the step-down unit. The two ends of resistor R18 are connected to the base and emitter of transistor Q4 respectively. The collector of transistor Q4 is connected to the anode of photoelectric bidirectional thyristor U2. The two ends of the input circuit of relay J1 are connected to the anode and cathode of diode D5 respectively.

8. A steam oven control circuit according to claim 2, characterized in that: It also includes a fault alarm module, the main control module is connected to the fault alarm module, and the step-down unit or the switching power supply unit is connected to the fault alarm module.

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