Two-in-one multi-head electromagnetic oven circuit

Abstract

The circuit for a multi-head induction cooker with two separate motors includes at least two main control units, IC1 and IC2; it also includes an IGBT1 transistor, the base of which is connected to the control terminal of the main control unit IC1, the emitter of which is grounded, and the collector of which is connected to the power supply terminal through the output terminal; it also includes an IGBT2 transistor, the base of which is connected to the control terminal of the main control unit IC2, the emitter of which is grounded, and the collector of which is connected to the power supply terminal through the output terminal; and it also includes a display and control module connected to the main control units IC1 and IC2. This application integrates two sets of control circuits onto a single circuit board, sharing peripheral circuits, thereby reducing the number of circuit boards and fan circuits, reducing the overall size of the machine, and lowering operating noise. This not only saves on design costs and allows the product to be made more compact and refined, but also improves the user experience.

Description

Technical Field

[0001] This utility model relates to the field of induction cookers, and in particular to a circuit for a multi-burner induction cooker with one burner and two burners. Background Technology

[0002] Induction cookers utilize the principle of magnetic field induction eddy current heating to directly heat cookware, achieving an energy conversion efficiency of 80%–90%. Their popularity stems from their flameless operation, high efficiency, and portability. Consequently, dual-burner and even multi-burner induction cookers have emerged. However, multi-burner cookers suffer from low consumer acceptance due to their large size, relatively complex structure, and high cost. Therefore, developing a dual-burner multi-burner induction cooker solution would help reduce costs and shrink the structural size.

[0003] Multi-burner induction cookers on the market generally use a number of mainboards depending on the number of burners. While this approach allows multiple burners to heat simultaneously, it results in a bulky design, high circuit board costs, and each mainboard requires a separate fan for cooling, increasing both cost and operating noise. Utility Model Content

[0004] To solve the above problems, this technical solution provides a circuit for a multi-head induction cooker that can operate on two separate circuits.

[0005] To achieve the above objectives, the technical solution is as follows:

[0006] A circuit for a multi-head induction cooker with one main control unit and two main control units includes at least a main control unit IC1 and a main control unit IC2.

[0007] It also includes an IGBT1 transistor, the base of which is connected to the control terminal of the main control unit IC1, the emitter is grounded, and the collector is connected to the power supply terminal through the output terminal;

[0008] It also includes an IGBT2 transistor, the base of which is connected to the control terminal of the main control unit IC2, the emitter is grounded, and the collector is connected to the power supply terminal through the output terminal;

[0009] It also includes a display and control module connected to the main control unit IC1 and the main control unit IC2.

[0010] In some embodiments, the collector of the IGBT1 transistor is grounded in sequence through resistors R42, R1, R4, R8, R10, R15, R17, R20 and R23, and the common terminal of resistors R20 and R23 is connected to the main control unit IC1.

[0011] The collector of the IGBT1 transistor is also grounded in sequence through capacitor C1, resistor R2, resistor R6, resistor R7, resistor R9, resistor R14, resistor R19 and resistor R22. The common terminal of resistor R19 and resistor R22 is connected to the main control unit IC1.

[0012] In some embodiments, a terminal TOP1 for connection to a temperature sensor is also included. One end of the terminal TOP1 is connected to a voltage via a resistor R29 and is also connected to the main control unit IC1. The other end is grounded.

[0013] In some embodiments, one end of the power supply terminal is grounded through resistors R30, R32, R35 and R36 in sequence, and the common terminal of resistors R35 and R36 is connected to the main control unit IC1.

[0014] The other end is grounded in sequence through resistors R41, R11, R16 and R12. The common terminal of resistors R16 and R12 is connected to the main control unit IC1.

[0015] In some embodiments, the power supply terminal is also grounded in sequence through resistor R28, resistor R31, resistor R34 and capacitor C21, and the common terminal of resistor R34 and capacitor C21 is connected to the main control unit IC1.

[0016] The beneficial effects of this application are:

[0017] This application integrates two sets of control circuits onto a single circuit board, sharing the same peripheral circuitry. This reduces the number of circuit boards and fan circuits, shrinking the overall size of the machine and lowering operating noise. It not only saves on solution costs and allows the product to be made more compact and refined, but also improves the user experience. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the block structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the control unit IC1 according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the control unit IC2 in an embodiment of the present invention. Detailed Implementation

[0022] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] Please refer to Figure 1-3 As shown, the circuit of a multi-head induction cooker with one main control unit and two main control units includes at least main control unit IC1 and main control unit IC2.

[0024] It also includes an IGBT1 transistor, the base of which is connected to the control terminal of the main control unit IC1, the emitter is grounded, and the collector is connected to the power supply terminal through the output terminal;

[0025] It also includes an IGBT2 transistor, the base of which is connected to the control terminal of the main control unit IC2, the emitter is grounded, and the collector is connected to the power supply terminal through the output terminal;

[0026] It also includes a display and control module connected to the main control unit IC1 and the main control unit IC2.

[0027] The input voltage powers the microcontroller through the power supply circuit, while a separate power supply circuit powers the fan circuit. The microcontroller detects signals from the peripheral circuits, outputs drive signals, and tracks signal feedback in real time to adjust the output to achieve optimal operating conditions.

[0028] See attached document Figure 2 The circuit uses an OB6657 microcontroller, which is powered by a common power supply circuit. At the same time, it drives the IGBT by detecting the external input signals and tracks the signal feedback in real time. This process is repeated to form a closed loop.

[0029] The circuit operation process of this utility model is as follows: The microcontroller controls the output of IGBT1 through D1, C3, R3, R5, and ZD1, and outputs to IGBT2 through D1A, C3A, R3A, R5A, and ZD3. The feedback circuit signal monitors the two working feedback signals to achieve the effect of balancing the output of the two furnaces.

[0030] This utility model utilizes a single-chip microcomputer of model OB6657 and combines two drive and detection circuits into one through a shared power supply, reducing one circuit board. At the same time, it adopts a common fan circuit, reducing one fan drive. Compared with the traditional multi-head furnace solution, it not only greatly reduces the solution cost, but also reduces the size of the whole machine and the operating noise.

[0031] In this embodiment, the collector of the IGBT1 transistor is grounded in sequence through resistors R42, R1, R4, R8, R10, R15, R17, R20 and R23, and the common terminal of resistors R20 and R23 is connected to the main control unit IC1.

[0032] The collector of the IGBT1 transistor is also grounded in sequence through capacitor C1, resistor R2, resistor R6, resistor R7, resistor R9, resistor R14, resistor R19 and resistor R22. The common terminal of resistor R19 and resistor R22 is connected to the main control unit IC1, and information feedback is given to the main control unit IC1 through the above circuit.

[0033] In this embodiment, a terminal TOP1 for connection to a temperature sensor is also included. One end of the terminal TOP1 is connected to a voltage through a resistor R29 and is also connected to the main control unit IC1. The other end is grounded. This module is used to detect the temperature of the IGBT tube. When the temperature of the IGBT tube changes, the resistance of the temperature sensor also changes, thereby changing the TOP signal received by the main control unit, and thus detecting the temperature of the IGBT tube.

[0034] In this embodiment, one end of the power supply is grounded through resistors R30, R32, R35 and R36 in sequence, and the common terminal of resistors R35 and R36 is connected to the main control unit IC1.

[0035] The other end is grounded in sequence through resistors R41, R11, R16 and R12. The common terminal of resistors R16 and R12 is connected to the main control unit IC1 for detecting the voltage of the power supply.

[0036] In this embodiment, the power supply terminal is also grounded in sequence through resistors R28, R31, R34 and capacitor C21. The common terminal of resistor R34 and capacitor C21 is connected to the main control unit IC1 for detecting the zero-crossing point of the power supply.

[0037] The above description is only a preferred embodiment of this application and is not intended to limit the scope of implementation of this application. Any other embodiments whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. A circuit for a multi-head induction cooker with one generator and two induction burners, characterized in that: It includes at least main control unit IC1 and main control unit IC2; It also includes an IGBT1 transistor, the base of which is connected to the control terminal of the main control unit IC1, the emitter is grounded, and the collector is connected to the power supply terminal through the output terminal; It also includes an IGBT2 transistor, the base of which is connected to the control terminal of the main control unit IC2, the emitter is grounded, and the collector is connected to the power supply terminal through the output terminal; It also includes a display and control module connected to the main control unit IC1 and the main control unit IC2.

2. The circuit for a multi-head induction cooker with one generator and two induction burners according to claim 1, characterized in that: The collector of the IGBT1 transistor is grounded in sequence through resistors R42, R1, R4, R8, R10, R15, R17, R20 and R23. The common terminal of resistors R20 and R23 is connected to the main control unit IC1. The collector of the IGBT1 transistor is also grounded in sequence through capacitor C1, resistor R2, resistor R6, resistor R7, resistor R9, resistor R14, resistor R19 and resistor R22. The common terminal of resistor R19 and resistor R22 is connected to the main control unit IC1.

3. The circuit for a multi-head induction cooker with one generator and two induction burners according to claim 2, characterized in that: It also includes a terminal TOP1 for connection to a temperature sensor. One end of the terminal TOP1 is connected to a voltage via a resistor R29 and is also connected to the main control unit IC1. The other end is grounded.

4. The circuit for a multi-head induction cooker with one generator and two induction burners according to claim 1, characterized in that: One end of the power supply is grounded through resistors R30, R32, R35 and R36 in sequence, and the common terminal of resistors R35 and R36 is connected to the main control unit IC1. The other end is grounded in sequence through resistors R41, R11, R16 and R12. The common terminal of resistors R16 and R12 is connected to the main control unit IC1.

5. The circuit for a multi-head induction cooker with one generator and two induction burners according to claim 1, characterized in that: The power supply terminal is also grounded in sequence through resistors R28, R31, R34 and capacitor C21. The common terminal of resistor R34 and capacitor C21 is connected to the main control unit IC1.

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