CN218277197U - Magnetic wave furnace hybrid heating circuit and magnetic wave furnace - Google Patents
Magnetic wave furnace hybrid heating circuit and magnetic wave furnace Download PDFInfo
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- CN218277197U CN218277197U CN202222261809.2U CN202222261809U CN218277197U CN 218277197 U CN218277197 U CN 218277197U CN 202222261809 U CN202222261809 U CN 202222261809U CN 218277197 U CN218277197 U CN 218277197U
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Abstract
The utility model discloses a magnetic wave stove hybrid heating circuit and magnetic wave stove, include: the system comprises a mains supply interface, a rectifying circuit, an electromagnetic heating unit, a far infrared heating unit and a first microprocessor; the mains supply interface is used for being connected with mains supply to obtain electricity; the electromagnetic heating unit comprises a first driving circuit and a resonant circuit; the far infrared heating unit comprises a second driving circuit, a far infrared heating film and a controlled silicon, wherein the far infrared heating film and the controlled silicon are connected between a rectifying circuit and the second driving circuit; the first microprocessor is respectively in signal connection with the electromagnetic heating unit and the far infrared heating unit. The utility model discloses can realize electromagnetic heating unit and infrared heating unit hybrid heating to utilize silicon controlled rectifier control alternating current, directly carry out the carrier wave to the alternating current, realize adjusting power, reach controlled temperature's purpose.
Description
Technical Field
The utility model relates to an electromagnetic heating field particularly relates to a magnetic wave stove hybrid heating circuit and magnetic wave stove.
Background
The induction cooker with extremely high market popularity belongs to the upgrading of household appliances of parking goods, and is healthy for users no matter the upgrading of radiation protection of heating efficiency. And chronic unpredictable damage to the nutrition of the heated food material.
The far infrared heating realizes heat conduction to food by utilizing the penetrating power of light of far infrared life, heats food materials with light radiation, does not damage nutrition of users and the food materials, but has low far infrared generation rate in the existing market, low heating efficiency, long cooking time and no market acceptance.
SUMMERY OF THE UTILITY MODEL
The utility model discloses just provide based on prior art's above-mentioned demand, the utility model discloses solve electromagnetic heating radiation and nutrition loss problem, the following far infrared heating efficiency of domestic rank 4000W is low to and the long problem of culinary art time, provide a magnetic wave stove hybrid heating circuit and magnetic wave stove.
In order to solve the above problem, the utility model provides a technical scheme includes:
a hybrid heating circuit of a magnetic wave oven, comprising:
the device comprises a mains supply interface, a rectifying circuit, an electromagnetic heating unit, a far infrared heating unit and a first microprocessor;
the mains supply interface is used for being connected with mains supply to obtain electricity;
the electromagnetic heating unit comprises a first driving circuit and a resonant circuit;
the far infrared heating unit comprises a second driving circuit, a far infrared heating film and a controlled silicon, wherein the far infrared heating film and the controlled silicon are connected between the rectifying circuit and the second driving circuit;
the first microprocessor is respectively in signal connection with the electromagnetic heating unit and the far infrared heating unit.
According to the rectification circuit, commercial power is converted into direct current, and the electromagnetic heating unit and the far infrared heating unit are controlled by the first microprocessor to realize mixed heating; the carrier is directly carried out on the alternating current through the controllable silicon, so that the power is adjusted, and the purpose of controlling the temperature is achieved.
Optionally, the system further comprises a communication module and a second microprocessor, wherein the first microprocessor and the second microprocessor interact with each other through the communication module; the second microprocessor is connected with the first driving circuit.
With this design, utilize communication module to make electromagnetic heating unit and far infrared heating unit become independent module respectively, play keep apart and information interaction bridge effect, the complete machine assembly and the maintenance of being convenient for.
Optionally, the system further comprises a power module, wherein one end of the power module is connected with the mains supply interface, and the other end of the power module is connected with the first microprocessor.
The power supply module is set up to continuously supply power for the first microprocessor.
Optionally, the power supply further comprises a zero-crossing detection module connected between the mains interface and the first microprocessor, and the power supply module is connected in parallel with the zero-crossing detection module.
Optionally, the zero-crossing detection module is configured to control a conduction time of a thyristor in the far infrared heating unit, detect a protection power module, and determine whether the mains supply interface connection is normal.
Optionally, the first microprocessor is connected with a human-computer interaction interface;
and the first microprocessor receives a user instruction of the human-computer interaction interface.
With the design, the user can conveniently operate and check the state of the induction cooker.
Optionally, the first microprocessor sends a frame of data to the communication module according to a user instruction, and after the second microprocessor receives the data, the second microprocessor feeds back a frame of data to the communication module and determines the state of the electromagnetic heating unit according to the fed back frame of data; and the human-computer interaction interface displays the states of the electromagnetic heating unit and the far infrared heating unit.
With the arrangement, a user can send instructions to control the induction cooker through the human-computer interaction interface and check information fed back by the first microprocessor and the second microprocessor.
Optionally, the resonant circuit comprises a resonant inductor, a heating coil, a first resonant capacitor, a second resonant capacitor and an IGBT, the heating coil and the second resonant capacitor being connected in parallel; one end of the resonance inductor is connected with the rectifying circuit, and the other end of the resonance inductor is connected with one common connecting end of the heating coil, the first resonance capacitor and the second resonance capacitor; the other common connecting end of the heating coil and the second resonant capacitor is connected with the drain electrode of the IGBT, the source electrode of the IGBT and the other common connecting end of the first resonant capacitor are grounded, and the grid electrode of the IGBT is connected with the output end of the first driving circuit; and the input end of the first driving circuit is connected with the second microprocessor.
With this arrangement, the second microprocessor can control the electromagnetic heating units individually.
Optionally, the first microprocessor controls the electromagnetic heating unit and the far infrared heating unit to heat synchronously.
A magnetic wave oven comprises the magnetic wave oven hybrid heating circuit.
Compared with the prior art, the utility model integrates and mixes the electromagnetic heating unit and the far infrared heating unit for use, solves the problems of electromagnetic heating radiation and nutrition loss, has low far infrared heating efficiency below the household level 4000W and long cooking time, reduces the radiation by 50 percent for the electromagnetic oven with the same power, and shortens the heating time of the heated liquid with the same capacity by more than 15 percent for the far infrared oven with the same power; the silicon controlled rectifier is used for controlling alternating current, and carrier waves are directly carried out on the alternating current, so that power regulation is achieved, and the purpose of controlling temperature is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present specification, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a schematic structural diagram of a hybrid heating circuit of a magnetic wave oven according to an embodiment of the present invention;
fig. 2 is a waveform conversion diagram of a hybrid heating circuit of a magnetic wave oven according to an embodiment of the present invention.
Reference numerals: 1-mains supply interface; 2-a power supply module; 3-a zero crossing detection module; 4-a first microprocessor; 5-a communication module; 6-a rectifying circuit; 7-an electromagnetic heating unit; 8-resonant inductance; 9-a heating coil; 10-a first resonant capacitance; 11-a second resonant capacitance; 12-IGBT; 13-a first drive circuit; 14-a second microprocessor; 15-a far infrared heating unit; 16-a far infrared heating film; 17-a thyristor; 18-a second drive circuit; a-alternating current sine waveform; and b, processing the waveform by a zero-crossing detection module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, which may be a mechanical connection, an electrical connection, which may be a direct connection, or an indirect connection via an intermediate medium. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The terms "top," "bottom," "above … …," "below," and "above … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.
For the purpose of facilitating understanding of the embodiments of the present application, the following description will be made in terms of specific embodiments with reference to the accompanying drawings, which are not intended to limit the embodiments of the present application.
The embodiment provides a magnetic wave oven hybrid heating circuit, as shown in fig. 1 specifically, including: the system comprises a mains supply interface 1, a rectifying circuit 6, an electromagnetic heating unit 7, a far infrared heating unit 15 and a first microprocessor 4;
the commercial power interface 1 is used for being connected with commercial power to obtain electricity;
the electromagnetic heating unit 7 comprises a first driving circuit 13 and a resonance circuit;
the far infrared heating unit 15 comprises a second driving circuit 18, a far infrared heating film 16 and a controlled silicon 17 which are connected between the rectifying circuit 6 and the second driving circuit 18, wherein a first anode of the controlled silicon 17 is connected with the far infrared heating film 16, a second anode is connected with the mains supply interface 1, and a control electrode is connected with the second driving circuit 18;
the first microprocessor 4 is respectively connected with the electromagnetic heating unit 7 and the far infrared heating unit 15 through signals.
The rectifier circuit 6 is a circuit that converts an alternating voltage that changes in positive and negative into a unidirectional pulsating voltage, such as a bridge rectifier.
The heating process of the far infrared heating unit 15 is realized by controlling the output power of the far infrared heating film 16 by adjusting the duty ratio of the PWM signal sent by the first microprocessor 4 to the second driving circuit 18, for example, taking power from the utility power interface 1, the voltage is 220V, the duty ratio of the PWM signal sent by the second driving circuit 18 is 50%, the average voltage on the far infrared heating film 16 is 110V, and the average power is P = U/R = 110/100=121w assuming that the internal resistance of the far infrared heating film 16 is 100 ohms.
Converting the current in the commercial power interface 1 into direct current according to the rectifying circuit 6, and controlling the electromagnetic heating unit 7 and the far-infrared heating unit 15 by using the first microprocessor 4 to realize mixed heating; the alternating current is directly carried by the controllable silicon 17, so that the power is adjusted, and the purpose of controlling the temperature is achieved.
The utility model discloses in the implementation mode, still include communication module 5 and second microprocessor 14, first microprocessor 4 and second microprocessor 14 are through communication module 5 interaction; the second microprocessor 14 is connected to the first driver circuit 13.
With this design, utilize communication module 5 to make electromagnetic heating unit 7 and far infrared heating unit 15 become independent module respectively, play isolation and information interaction bridge effect, the complete machine assembly and the maintenance of being convenient for.
The utility model discloses in the embodiment, still include power module 2, 2 one end of power module with commercial power interface 1 connects, the other end with first microprocessor 4 connects.
The power supply module 2 is set up to continuously supply power to the first microprocessor 4.
The utility model discloses in the embodiment, still including connecting commercial power interface 1 with zero cross detection module 3 between the first microprocessor 4, power module 2 with zero cross detection module 3 is parallelly connected.
The zero-crossing detection module 3 can detect the zero-crossing point of the pulsating direct current output by the rectifying circuit 6 and output a zero-crossing signal to the first microprocessor 4.
The far infrared heating unit 15 is connected with the first microprocessor 4 through the zero-crossing detection module 3, and can transmit a zero-crossing signal generated by the zero-crossing detection module 3 to the second driving circuit 18, and the second driving circuit 18 controls the far infrared heating film 16 to work by controlling the controllable silicon 17.
The zero-crossing detection module 3 is configured to control the conduction time of the thyristor 17 in the far infrared heating unit 15, detect the protection power module 2, and determine whether the connection of the commercial power interface 1 is normal.
As shown in fig. 2, the waveform a is an alternating current sinusoidal waveform, the waveform b is a waveform processed by the zero-crossing detection module 3, which is also called a square wave, the frequency of the processed square wave waveform is equal to the frequency of the alternating current, the signal of the square wave is connected to the input port of the first microprocessor 4, the processing module inside the first microprocessor 4 can detect the frequency in real time, wherein 1 and 2 are alternating current zero-crossing points.
If the mains supply interface 1 is removed, no sine wave is input at the mains supply interface 1, no square wave output signal is output by the zero-crossing detection module 3, and the first microprocessor 4 cannot detect the square wave signal, so that whether the mains supply interface 1 is normally connected or not can be judged.
According to the characteristic that the controllable silicon 17 can be automatically turned off but not turned on at the zero-crossing point of the mains supply interface 1, the turn-on time of the controllable silicon 17 is controlled, and the specific process is as follows: the controllable silicon 17 is automatically turned off after the zero crossing point is reached, after the first microprocessor 4 detects the zero crossing signal, an internal timer of the first microprocessor 4 starts timing, for example, the controllable silicon 17 is expected to be turned on after 2ms, when the timer counts 2ms, the first microprocessor 4 outputs a signal to a gate pole of the controllable silicon 17, so that the controllable silicon 17 is triggered to be turned on, and the controllable silicon is automatically turned off after the next zero crossing point is reached; assuming that the ac frequency is 50HZ, the period is: 1/f =20ms, the time of half wave is 10ms, the thyristor 17 is triggered to conduct after 2ms, the thyristor 17 is only conducted for 8ms, and the conduction time of the thyristor 17 can be controlled by using the principle.
In the embodiment of the present invention, the first microprocessor 4 is connected to a human-computer interaction interface;
the first microprocessor 4 receives a user instruction of the human-computer interaction interface.
With the design, the user can conveniently operate and check the state of the induction cooker.
In the embodiment of the present invention, the first microprocessor 4 sends a frame of data to the communication module 5 according to the user instruction, and after the second microprocessor 14 receives the data, the second microprocessor 14 feeds back a frame of data to the communication module 5, and determines the state of the electromagnetic heating unit 7 according to the fed back frame of data; the human-computer interaction interface displays the states of the electromagnetic heating unit 7 and the far infrared heating unit 15.
The specific process is as follows: the man-machine interface receives a user instruction, and the electromagnetic heating unit 7 and the far infrared heating unit 15 execute relevant operations.
The electromagnetic heating unit 7 performs a process including: the man-machine interaction interface receives a user instruction and sends the instruction to the first microprocessor 4, and the first microprocessor 4 sends frame data to the communication module 5 according to the user instruction; the communication module 5 converts the received frame data into corresponding signals and sends the corresponding signals to the second microprocessor 14; the second microprocessor 14 receives the related instruction and drives the first driving circuit 13 to control the electromagnetic heating unit 7 to perform the related operation, for example, whether the electromagnetic heating unit 7 operates, adjust the power level, and turn on/off the cooling fan may be controlled. Then the second microprocessor 14 feeds back a frame of data to the communication module 5; the communication module 5 converts the feedback frame data into corresponding signals and sends the corresponding signals to the first microprocessor 4; the first microprocessor 4 processes the received signals and executes related operations; for example, when the first microprocessor 4 receives a fault code that the furnace surface temperature sensor is short-circuited or open-circuited, it sends a shutdown instruction to the communication module 5; the communication module 5 sends the converted instruction to the second microprocessor 14; the second microprocessor 14 outputs a shutdown signal to the first driving circuit 13, so that the electromagnetic heating unit 7 stops working.
The far infrared heating unit 15 performs a process including: the human-computer interaction interface receives a user instruction and sends the instruction to the first microprocessor 4, and the first microprocessor 4 drives the second driving circuit 18 after receiving the user instruction and controls the far infrared heating unit 15 to execute related work; if an abnormality occurs during the operation, the first microprocessor 4 immediately sends a stop signal to the far infrared heating unit 15 to stop heating.
The display screen is used for displaying the states of the electromagnetic heating unit 7 and the far infrared heating unit 15, for example, when the first microprocessor 4 receives a fault code, the fault code is displayed on the display screen.
With the arrangement, a user can send instructions to control the induction cooker through the man-machine interaction interface and view information fed back by the first microprocessor 4 and the second microprocessor 14.
In the embodiment of the present invention, the frame data is composed of 6 8-bit data, including a power-on command, a power-adjusting command, a cooling fan switch command, and a check code; the feedback frame data is composed of 9 pieces of 8-bit data, and includes an Insulated Gate Bipolar Transistor (IGBT) temperature value, an input voltage value, a working current value, a furnace surface temperature value, and a fault code of the electromagnetic heating unit 7.
In the embodiment of the present invention, the resonant circuit includes a resonant inductor 8, a heating coil 9, a first resonant capacitor 10, a second resonant capacitor 11 and an IGBT 12, and the heating coil 9 and the second resonant capacitor 11 are connected in parallel; one end of the resonant inductor 8 is connected with the rectifying circuit 6, and the other end of the resonant inductor is connected with one common connecting end of the heating coil 9, the first resonant capacitor 10 and the second resonant capacitor 11; the other common connection end of the heating coil 9 and the second resonance capacitor 11 is connected with the drain of the IGBT 12, the other common connection end of the source of the IGBT 12 and the first resonance capacitor 10 is grounded, and the gate of the IGBT 12 is connected with the output end of the first driving circuit 13; the input terminal of the first driving circuit 13 is connected to the second microprocessor 14.
From this design, realize the heating of electromagnetic heating unit 7, specific heating process is: an LC filter circuit is formed by the resonance inductor 8 and the first resonance capacitor 10, and a parallel resonance circuit is formed by the heating coil 9 and the second resonance capacitor 11; the PWM module in the second microprocessor 14 outputs PWM signals to the first driving circuit 13 to drive the IGBT 12 to work, and then the LC filter circuit and the parallel resonant circuit conduct and stop work according to the PWM signals with certain frequency sent by the second microprocessor 14; when the rectifier circuit is conducted, the LC filter circuit smoothes the pulse direct current output by the rectifier circuit 6 to obtain high-voltage direct current; when the circuit is cut off, the resonant circuit is a pulse direct current output by the rectifying circuit 6; high-voltage direct current and pulse direct current are operated alternately to form alternating current; the high-frequency alternating magnetic field induced around the heating coil 9 by the alternating current in the resonant circuit induces the ferromagnetic material at the bottom of the magnetic wave furnace in the magnetic field to form eddy current and generate heat. The strength of the high frequency alternating magnetic field depends on the duty cycle of the PWM signal output by the second microprocessor 14.
With this arrangement, the second microprocessor 14 can control the electromagnetic heating units 7 individually.
In the embodiment of the present invention, the first microprocessor 4 controls the electromagnetic heating unit 7 and the far infrared heating unit 15 to heat synchronously.
The electromagnetic heating unit 7 and the far infrared heating unit 15 work together, and the specific process is as follows: the first microprocessor 4 sends a PWM signal to the second microprocessor 14 through the communication module 5, and simultaneously outputs the PWM signal to the second driving circuit 18, the second microprocessor 14 outputs the PWM signal to the first driving circuit 13, the IGBT 12 is controlled to be turned off after being turned on for a certain time, and the heating coil 9 and the second resonance capacitor 11 generate resonance so as to achieve the purpose of heating; the second driving circuit 18 receives the PWM signal and drives the silicon controlled rectifier 17 to control the far infrared heating film 16 to heat.
Compared with the prior art, the embodiment of the utility model integrates and mixes the electromagnetic heating unit 7 and the far infrared heating unit 15 for use, solves the problems of electromagnetic heating radiation and nutrition loss, has low far infrared heating efficiency below the household level 4000W and long cooking time, reduces the radiation by 50% for the electromagnetic oven with the same power on the same scale, and shortens the heating time of the heated liquid by more than 15% for the far infrared oven with the same power on the same scale; the silicon controlled rectifier 17 is used for controlling alternating current, carrier waves are directly carried out on the alternating current, power is adjusted, and the purpose of controlling temperature is achieved.
The utility model also discloses a magnetic wave stove, including foretell magnetic wave stove hybrid heating circuit.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.
Claims (10)
1. A hybrid heating circuit of a magnetic wave oven, comprising:
the device comprises a mains supply interface, a rectifying circuit, an electromagnetic heating unit, a far infrared heating unit and a first microprocessor;
the mains supply interface is used for being connected with mains supply to obtain electricity;
the electromagnetic heating unit comprises a first driving circuit and a resonant circuit;
the far infrared heating unit comprises a second driving circuit, a far infrared heating film and a controlled silicon, wherein the far infrared heating film and the controlled silicon are connected between the rectifying circuit and the second driving circuit;
the first microprocessor is respectively in signal connection with the electromagnetic heating unit and the far infrared heating unit.
2. The hybrid heating circuit of claim 1, wherein the heating circuit comprises a first heating element and a second heating element,
the system also comprises a communication module and a second microprocessor, wherein the first microprocessor and the second microprocessor are interacted through the communication module; the second microprocessor is connected with the first driving circuit.
3. The hybrid heating circuit of claim 1, wherein the heating circuit comprises a first heating element and a second heating element,
the power supply module is characterized by further comprising a power supply module, wherein one end of the power supply module is connected with the commercial power interface, and the other end of the power supply module is connected with the first microprocessor.
4. The hybrid heating circuit of claim 3, wherein,
the power supply module is connected with the first microprocessor in parallel.
5. The hybrid heating circuit of claim 4, wherein the heating circuit comprises a first heating element and a second heating element,
the zero-crossing detection module is configured to control the conduction time of a thyristor in the far infrared heating unit, detect the protection power supply module and judge whether the commercial power interface connection is normal.
6. The hybrid heating circuit of claim 2, wherein the heating circuit comprises a first heating element and a second heating element,
the first microprocessor is connected with a human-computer interaction interface;
and the first microprocessor receives a user instruction of the human-computer interaction interface.
7. The hybrid heating circuit of claim 6, wherein the heating circuit comprises a first heating element and a second heating element,
the first microprocessor sends a frame of data to the communication module according to a user instruction, after the second microprocessor receives the data, the second microprocessor feeds back the frame of data to the communication module, and determines the state of the electromagnetic heating unit according to the fed back frame of data; and the human-computer interaction interface displays the states of the electromagnetic heating unit and the far infrared heating unit.
8. The hybrid heating circuit of claim 2, wherein the resonant circuit comprises a resonant inductor, a heating coil, a first resonant capacitor, a second resonant capacitor and an IGBT, and the heating coil and the second resonant capacitor are connected in parallel; one end of the resonance inductor is connected with the rectifying circuit, and the other end of the resonance inductor is connected with one common connecting end of the heating coil, the first resonance capacitor and the second resonance capacitor; the other common connecting end of the heating coil and the second resonant capacitor is connected with the drain electrode of the IGBT, the source electrode of the IGBT and the other common connecting end of the first resonant capacitor are grounded, and the grid electrode of the IGBT is connected with the output end of the first driving circuit; and the input end of the first driving circuit is connected with the second microprocessor.
9. The hybrid heating circuit of claim 1, wherein the first microprocessor controls the electromagnetic heating unit and the far infrared heating unit to heat synchronously.
10. A magnetic wave oven comprising the hybrid heating circuit of any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222261809.2U CN218277197U (en) | 2022-08-26 | 2022-08-26 | Magnetic wave furnace hybrid heating circuit and magnetic wave furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222261809.2U CN218277197U (en) | 2022-08-26 | 2022-08-26 | Magnetic wave furnace hybrid heating circuit and magnetic wave furnace |
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| CN218277197U true CN218277197U (en) | 2023-01-10 |
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| CN202222261809.2U Active CN218277197U (en) | 2022-08-26 | 2022-08-26 | Magnetic wave furnace hybrid heating circuit and magnetic wave furnace |
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