Electromagnetic heating device, noise suppression method, heating control system, and storage medium

Abstract

The electromagnetic heating device, the noise suppression method, the heating control system and the storage medium relate to the technical field of electromagnetic heating. The noise suppression method includes, when it is determined that two adjacent heating modules of an electromagnetic heating device are operated in succession, obtaining the operation start frequency of the late-start heating module, and adjusting the operation frequency of the early-start heating module according to the operation start frequency of the late-start heating module, so that the two adjacent heating modules are synchronously operated at the same operation frequency when the late-start heating module starts to operate.

Description

[Technical field]

[0001] This application claims priority to a Chinese patent application entitled "Electromagnetic Heating Device, Noise Suppression Method, Heating Control System, and Storage Medium" filed on December 29, 2020, Application No. 202011587915.9, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of electromagnetic heating, and in particular to an electromagnetic heating device, a noise suppression method, a heating control system and a storage medium. [Background technology]

[0003] Currently, electromagnetic heating devices that have multiple heating regions and heat in response to a combination of multiple coils generally adopt a control method in which the power of the heating module is gradually increased to a target power during the start-up process of electromagnetic heating, i.e., a control method in which the rate of change of the driving power is gradually decreased. Summary of the Invention [Problem to be solved by the invention]

[0004] However, with this control method, when the heating of two adjacent regions is started one after the other, the magnetic field directions of the adjacent coils may not be synchronized, and the magnetic fields of the adjacent coils may overlap or cancel each other out, resulting in electromagnetic noise. [Means for solving the problem]

[0005] This application proposes an electromagnetic heating device, a noise suppression method, a heating control system, and a storage medium that, when a later-starting heating module begins operation, adjusts the operating frequency of the adjacent heating module that started first to be the same as the operating frequency of the later-starting heating module, thereby making the coil magnetic field directions of the earlier-starting heating module and the later-starting heating module the same, thereby eliminating electromagnetic noise.

[0006] According to a first aspect, the present application proposes an electromagnetic noise suppression method for an electromagnetic heating device, which includes the steps of: acquiring an operation start frequency of the late-start heating module when it is determined that two adjacent heating modules of the electromagnetic heating device operate in succession; and adjusting the operation frequency of the early-start heating module according to the operation start frequency of the late-start heating module so that the two adjacent heating modules operate synchronously at the same operation frequency when the late-start heating module starts operating.

[0007] In the electromagnetic noise suppression method of the electromagnetic heating device according to the embodiment of the present application, when it is determined that two adjacent heating modules of the electromagnetic heating device are operated in succession, the operation start frequency of the later-start heating module is obtained, and the operation frequency of the early-start heating module is adjusted according to the operation start frequency of the later-start heating module, so that the two adjacent heating modules operate synchronously at the same operation frequency when the later-start heating module starts to operate. Thus, when the later-start heating module starts to operate, the operation frequency of the earlier-started adjacent heating module is adjusted to be the same as the operation frequency of the later-start heating module, so that the coil magnetic field directions of the earlier-started heating module and the later-started heating module can be made the same, thereby realizing the elimination of electromagnetic noise.

[0008] According to a second aspect, the present application proposes a computer-readable storage medium having stored therein an electromagnetic noise suppression program for an electromagnetic heating device, and when the electromagnetic noise suppression program for an electromagnetic heating device is executed by a processor, the above-mentioned electromagnetic noise suppression method for an electromagnetic heating device is realized.

[0009] When the electromagnetic noise suppression program for an electromagnetic heating device stored in the computer-readable storage medium according to an embodiment of the present application is executed by a processor, when the subsequently started heating module begins operation, the operating frequency of the adjacent heating module that started first is adjusted to be the same as the operating frequency of the subsequently started heating module, thereby making the coil magnetic field directions of the previously started heating module and the subsequently started heating module the same, thereby eliminating electromagnetic noise.

[0010] According to a third aspect, the present application proposes an electromagnetic heating device including a memory, a processor, and an electromagnetic noise suppression program for an electromagnetic heating device stored on the memory and executable by the processor, and when the electromagnetic noise suppression program is executed by the processor, the above-mentioned electromagnetic noise suppression method for an electromagnetic heating device is realized.

[0011] The electromagnetic heating device of the embodiment of the present application realizes the above-mentioned electromagnetic noise suppression method for the electromagnetic heating device, so that when the later-started heating module begins operation, the operating frequency of the adjacent heating module that was started first is adjusted to be the same as the operating frequency of the later-started heating module, thereby making the coil magnetic field directions of the earlier-started heating module and the later-started heating module the same, thereby eliminating electromagnetic noise.

[0012] According to a fourth aspect, the present application proposes a heating control system for an electromagnetic heating device, including a first heating module and a second heating module provided corresponding to adjacent heating regions, a first driving module for driving and operating the first heating module, a second driving module for driving and operating the second heating module, a rectification module for rectifying an input AC power source to output a power supply and supplying the power supply to the first heating module and the second heating module, a zero-cross detection module for detecting a zero-cross signal of the AC power source, and a control module for, when the first heating module is operating and the second heating module needs to be started, acquiring an operation start frequency of the second heating module, generating a first control signal and a second control signal based on the zero-cross signal and the operation start frequency of the second heating module, respectively, adjusting the operation frequency of the first heating module by the first driving module based on the first control signal, and driving and operating the second heating module by the second driving module based on the second control signal, thereby making the first heating module and the second heating module operate synchronously at the same operation frequency.

[0013] In the heating control system of the electromagnetic heating device according to the embodiment of the present application, the zero-cross detection module detects a zero-cross signal of the AC power supply, the rectification module rectifies the input AC power supply to output a power supply, and supplies the power supply to the first heating module and the second heating module, the first driving module drives the first heating module to operate, and the second driving module drives the second heating module to operate, and the control module obtains the operation start frequency of the second heating module when the first heating module is operating and the second heating module needs to be started, and generates a first control signal and a second control signal respectively based on the zero-cross signal and the operation start frequency of the second heating module, adjusts the operation frequency of the first heating module by the first driving module based on the first control signal, and drives the second heating module to operate by the second driving module based on the second control signal, so that the first heating module and the second heating module operate synchronously at the same operating frequency. As a result, when the heating module that starts later begins operation, the operating frequency of the adjacent heating module that started earlier can be adjusted to be the same as the operating frequency of the heating module that starts later, thereby making the coil magnetic field directions of the heating module that started earlier and the heating module that starts later the same, thereby eliminating electromagnetic noise.

[0014] According to a fifth aspect, the present application proposes another electromagnetic heating device including the heating control system of the electromagnetic heating device described above.

[0015] In the electromagnetic heating device according to the embodiment of the present application, when the subsequently started heating module begins operation due to the heating control system of the electromagnetic heating device described above, the operating frequency of the adjacent heating module that was started first is adjusted to be the same as the operating frequency of the subsequently started heating module, thereby making the coil magnetic field directions of the previously started heating module and the subsequently started heating module the same, thereby eliminating electromagnetic noise.

[0016] Additional aspects and advantages of the present application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present application. [Brief description of the drawings]

[0017] The above and / or additional aspects and advantages of the present application will become apparent and become easier to understand from the following description of the embodiments with reference to the drawings.

[0018] [Figure 1] 2 is a flowchart of a method for suppressing electromagnetic noise in an electromagnetic heating device according to an embodiment of the present application. [Diagram 2] 1 is a schematic diagram showing a configuration of an electromagnetic heating device according to an embodiment of the present application. [Diagram 3] 4 is a waveform diagram of a method for suppressing electromagnetic noise in an electromagnetic heating device according to an embodiment of the present application. [Figure 4] FIG. 11 is a waveform diagram of a method for suppressing electromagnetic noise in an electromagnetic heating device according to another embodiment of the present application. [Diagram 5] 1 is a block diagram showing a configuration of a heating control system for an electromagnetic heating device according to an embodiment of the present application. [Figure 6] 1 is a block diagram showing a configuration of an electromagnetic heating device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, the embodiments of the present application will be described in detail. Examples of the embodiments of the present application are shown in the drawings, in which the same or similar reference numerals throughout indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and are merely for interpreting the present application, and cannot be understood as limitations on the present application.

[0020] Hereinafter, an electromagnetic heating device, a noise suppression method, a heating control system, and a storage medium according to embodiments of the present application will be described with reference to the accompanying drawings.

[0021] FIG. 1 is a flowchart of a method for suppressing electromagnetic noise in an electromagnetic heating device according to an embodiment of the present application.

[0022] As shown in FIG. 1, the method for suppressing electromagnetic noise in an electromagnetic heating device includes steps S11 to S12.

[0023] In step S11, if it is determined that the two adjacent heating modules of the electromagnetic heating device work in succession, obtain the working frequency of the late-start heating module.

[0024] In addition, since the operating frequency of the heating module of the electromagnetic heating device is generally high, the operating frequency of the heating module can be controlled by controlling the frequency of the driving signal output from the driving module.

[0025] For example, the operation start frequencies of all the heating modules of the electromagnetic heating device can be obtained in advance, and the frequencies of the driving signals corresponding to the operation start frequencies can be obtained and stored in the memory of the electromagnetic heating device. Furthermore, if it is determined that two adjacent heating modules are operated in succession, the frequency of the driving signal required for the latter-start heating module can be obtained from the memory.

[0026] The frequencies of the driving signals required for all of the above-mentioned heating modules may be stored in the cloud server, and once it is determined that two adjacent heating modules operate in succession, the frequency of the driving signal required for the subsequent start-up heating module can be obtained from the cloud server.

[0027] In step S12, the operation frequency of the early-start heating module is adjusted according to the operation start frequency of the late-start heating module so that the two adjacent heating modules operate synchronously at the same operation frequency when the late-start heating module starts operating.

[0028] As an example, as shown in Fig. 2, an AC power supply 10 outputs an AC signal. A zero-cross detection module 60 receives the AC signal output from the AC power supply 10, processes the AC signal to obtain a zero-volt detection signal, and transmits the zero-volt detection signal to a control module 30. The control module 30 can realize the control of the heating module by controlling the harmonic voltage waveform required for the power module output coil through a driving module.

[0029] The method in which the control module 30 controls the heating modules may be such that, when the operating frequency of the early start heating module is controlled to be reduced to the operating start frequency of the late start heating module, the late start heating module is controlled to start operating synchronously at the same operating frequency.

[0030] In this embodiment, as shown in Fig. 3, before the rear starting module starts to operate, the control module 30 controls the driving module 40 to output a driving signal, the frequency of this driving signal is a frequency required for the coil 90 to operate normally, and the power module 70 outputs a resonant voltage waveform A that can operate the coil 90 normally based on this driving signal. The control module 30 controls the driving module 50 not to output a driving signal.

[0031] When the delayed start module starts to operate, the control module 30 controls the driving module 50 to output a driving signal, the frequency of the driving signal is a frequency required for heating and starting the coil 100, and the power module 80 outputs a B resonance voltage waveform that can heat and start the coil 100 based on the received driving signal. The control module 30 controls the driving module 40 to increase the frequency of the driving signal output until it is the same as the frequency of the driving signal output by the driving module 50.

[0032] The method of controlling the heating modules by the control module 30 may be a method of controlling the advance start heating module to stop operating, and after a predetermined time, controlling the advance start heating module and the delayed start heating module to start operating synchronously in accordance with the operation start frequency of the delayed start heating module.

[0033] In this embodiment, as shown in Fig. 4, the control module 30 controls the driving module 40 to output a driving signal before the first predetermined time when the rear start module starts to operate, the frequency of this driving signal is a frequency required for the coil 90 to operate normally, and the power module 70 outputs an A resonant voltage waveform that can operate the coil 90 normally based on this driving signal. The control module 30 controls the driving module 50 not to output a driving signal. The first predetermined time may be set by the user or may be a device default predetermined time.

[0034] The control module 30 controls the driving modules 40 and 50 so that neither of them outputs a driving signal within a first predetermined time before the rear starting module starts to operate. That is, the control module 30 controls the coil 90 that has been started in advance to stop heating within a first predetermined time before the rear starting module starts to operate.

[0035] When the delayed start module starts to operate, the control module 30 controls the driving module 50 to output a driving signal, the frequency of which is a frequency required for heating and starting the coil 100, and the power module 80 outputs a B resonant voltage waveform that can heat and start the coil 100 based on the received driving signal. The control module 30 controls the driving module 40 to output a driving signal, the frequency of which is the same as the frequency of the driving signal output by the driving module 50.

[0036] As a result, when the coil 100 that is started later starts to start, the frequency of the drive signal output by the drive module 40 can be adjusted to be the same as the frequency of the drive signal output by the drive module 50.

[0037] After two adjacent heating modules are synchronously operated at the same operating frequency, the change trends of the operating frequencies of the two adjacent heating modules are kept consistent. That is, as the coil 100 performs the start-up heating process, the frequency of the driving signal required for the coil 100 gradually decreases, the driving module 50 outputs a driving signal that can meet the requirements of the coil 100, the power module 80 outputs a corresponding B resonant voltage waveform based on the received driving signal so that the coil 100 performs the start-up heating process, and the control module 30 controls the driving module 40 to output a driving signal, the frequency of which is the same as the frequency of the driving signal output by the driving module 50. The control module 30 and the driving module 40 output driving signals of the same frequency until the coil 100 completes the start-up heating process.

[0038] This makes it possible to maintain the frequency change of the drive signal output by the drive module 40 and the frequency change of the drive signal output by the drive module 50 in synchronization with each other during the starting process of the coil 100 that is started later.

[0039] In the process in which two adjacent heating modules are operating synchronously, the duty ratios of the PWM signals of the two adjacent heating modules can be independently adjusted between 0% and 50%. That is, the frequencies of the driving signals output by the driving modules 40 and 50 are the same, but the duty ratios of the driving signals output by the driving modules 40 and 50 may be different.

[0040] In addition, the electromagnetic noise suppression method of the electromagnetic heating device according to the embodiment of the present application may control multiple adjacent heating modules. For example, when there are three adjacent heating modules A, B, and C, heating module A starts to operate first, and heating module C starts to operate last. In the process in which heating module B starts to heat, heating module A can be controlled to be kept synchronized with heating module B, and in the process in which heating module C starts to heat, heating module A and heating module B can be controlled to be kept synchronized with heating module C.

[0041] As described above, the electromagnetic noise suppression method for an electromagnetic heating device according to the embodiment of the present application can, when the heating module that starts later starts to operate, adjust the operating frequency of the adjacent heating module that started earlier to be the same as the operating frequency of the heating module that starts later, thereby making the coil magnetic field directions of the heating module that started earlier and the heating module that starts later the same, thereby eliminating electromagnetic noise. Furthermore, during the startup process of the heating module that starts later, the coil magnetic field direction is kept synchronized with that of the adjacent heating module that started earlier, thereby preventing electromagnetic noise from occurring during the startup process of the heating module that starts later.

[0042] Furthermore, the present application proposes a computer-readable storage medium.

[0043] In an embodiment of the present application, a computer-readable storage medium stores an electromagnetic noise suppression program for an electromagnetic heating device, and the above-mentioned electromagnetic noise suppression method for an electromagnetic heating device is realized when the electromagnetic noise suppression program for an electromagnetic heating device is executed by a processor.

[0044] When the electromagnetic noise suppression program for the electromagnetic heating device stored in the computer-readable storage medium according to the embodiment of the present application is executed by a processor, when the heating module that starts later starts to operate, the operating frequency of the adjacent heating module that started earlier is adjusted to be the same as the operating frequency of the heating module that starts later, so that the coil magnetic field directions of the heating module that started earlier and the heating module that starts later are made the same, thereby realizing the elimination of electromagnetic noise. Furthermore, during the start-up process of the heating module that starts later, the coil magnetic field direction is kept synchronized with that of the adjacent heating module that started earlier, thereby realizing the absence of electromagnetic noise during the start-up process of the heating module that starts later.

[0045] Furthermore, the present application proposes an electromagnetic heating device.

[0046] In an embodiment of the present application, the electromagnetic heating device includes a memory, a processor, and an electromagnetic noise suppression program for the electromagnetic heating device stored on the memory and executable by the processor, and when the electromagnetic noise suppression program is executed by the processor, the above-mentioned electromagnetic noise suppression method for the electromagnetic heating device is realized.

[0047] The electromagnetic heating device according to the embodiment of the present application realizes the above-mentioned electromagnetic noise suppression method for the electromagnetic heating device, so that when the heating module that starts later starts to operate, the operating frequency of the adjacent heating module that started earlier is adjusted to be the same as the operating frequency of the heating module that starts later, thereby making the coil magnetic field directions of the heating module that started earlier and the heating module that starts later the same, thereby realizing the elimination of electromagnetic noise. Furthermore, during the start-up process of the heating module that starts later, the coil magnetic field direction is kept synchronized with that of the adjacent heating module that started earlier, thereby realizing the absence of electromagnetic noise during the start-up process of the heating module that starts later.

[0048] FIG. 5 is a block diagram showing the configuration of a heating control system for an electromagnetic heating device according to an embodiment of the present application.

[0049] As shown in FIG. 5, the heating control system 100 of this electromagnetic heating device includes a first heating module 101, a second heating module 102, a first driving module 103, a second driving module 104, a rectifier module 105, a zero-cross detection module 106, a control module 107, and an AC power supply 108.

[0050] In this embodiment, the first driving module 103 drives the first heating module 101 to operate, the second driving module 104 drives the second heating module 102 to operate, the rectifying module 105 rectifies the input AC power supply 108 to output a power supply and supplies the power supply to the first heating module 101 and the second heating module 102, the zero-cross detection module 106 detects a zero-cross signal of the AC power supply 108, and the control module 107 detects whether the first heating module 101 is operating and the second heating module 102 is operating. When it is necessary to start the second heating module 102, the operation start frequency of the second heating module 102 is obtained, and a first control signal and a second control signal are generated based on the zero-cross signal and the operation start frequency of the second heating module 102, respectively. The operation frequency of the first heating module 101 is adjusted by the first driving module 103 based on the first control signal, and the second driving module 104 drives and operates the second heating module 102 based on the second control signal, so that the first heating module 101 and the second heating module 102 operate synchronously at the same operation frequency.

[0051] When a later-starting heating module begins operation, this heating control system adjusts the operating frequency of the adjacent heating module that was started first to be the same as the operating frequency of the later-starting heating module, thereby making the coil magnetic field directions of the earlier-starting heating module and the later-starting heating module the same, thereby eliminating electromagnetic noise.

[0052] In one embodiment of the present application, the control module 107 is further used to control the second driving module to synchronously start operating at the same operating frequency based on a second control signal when the first driving module controls the first heating module to reduce the operating frequency to the start operating frequency of the second heating module based on a first control signal.

[0053] In one embodiment of the present application, the control module 107 is further used to control the first heating module to stop operating, and after a predetermined time, control the first heating module and the second heating module to start operating synchronously based on the operation start frequency of the delayed start heating module.

[0054] In the process in which the first heating module and the second heating module work synchronously, the duty ratios of the PWM signals of the two heating modules can be independently adjusted between 0% and 50%.

[0055] Furthermore, after the first heating module and the second heating module operate synchronously at the same operating frequency, the change trend of the operating frequency of the first heating module and the change trend of the operating frequency of the second heating module are maintained to match each other.

[0056] For other specific embodiments of the heating control system for an electromagnetic heating device according to the embodiments of the present application, reference can be made to the heating control system for an electromagnetic heating device described above.

[0057] As described above, the heating control system of the electromagnetic heating device according to the embodiment of the present application, when the heating module that starts later starts to operate, adjusts the operating frequency of the adjacent heating module that starts earlier to be the same as the operating frequency of the heating module that starts later, thereby making the coil magnetic field directions of the heating module that starts earlier and the heating module that starts later the same, thereby realizing the elimination of electromagnetic noise. Furthermore, during the startup process of the heating module that starts later, the coil magnetic field direction is kept synchronized with the adjacent heating module that starts earlier, thereby realizing the prevention of electromagnetic noise during the startup process of the heating module that starts later.

[0058] FIG. 6 is a block diagram showing the configuration of an electromagnetic heating device according to another embodiment of the present application.

[0059] As shown in FIG. 6, this electromagnetic heating device 1000 includes the heating control system 100 for the electromagnetic heating device described above.

[0060] In the electromagnetic heating device according to the embodiment of the present application, when the heating module that starts later starts to operate, the heating control system of the electromagnetic heating device described above adjusts the operating frequency of the adjacent heating module that starts earlier to be the same as the operating frequency of the heating module that starts later, thereby making the coil magnetic field directions of the heating module that starts earlier and the heating module that starts later the same, thereby realizing the elimination of electromagnetic noise. Furthermore, during the start-up process of the heating module that starts later, the coil magnetic field direction is kept synchronized with that of the adjacent heating module that starts earlier, thereby realizing the absence of electromagnetic noise during the start-up process of the heating module that starts later.

[0061] It should be noted that the logic and / or steps shown in the flow charts or described in other aspects herein can be considered, for example, as a sequential listing of executable instructions used to realize logical functions, and can be specifically embodied in any computer-readable medium used in or in combination with an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or a system capable of obtaining and executing instructions from another instruction execution system, apparatus, or device). As used herein, a "computer-readable medium" may be any device capable of containing, storing, communicating, propagating, or transmitting a program used in or in combination with an instruction execution system, apparatus, or device. More specific examples (non-limiting list) of computer-readable media include an electrical connection having one or more wires (electronic device), a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable editable read-only memory (EPROM or flash memory), a fiber optic device, and a portable optical disk read-only memory (CD-ROM). The computer readable medium may also be paper or other suitable medium upon which the program may be printed so that the program may be obtained electronically, for example by optically scanning the paper or other medium and then edited, decoded, or processed in any other suitable manner as necessary, and then stored in computer memory.

[0062] It should be understood that each part of the present application may be realized by hardware, software, firmware, or a combination thereof. In the above embodiment, a plurality of steps or methods may be realized by software or firmware stored in a memory and executed by an appropriate instruction execution system. For example, when realized by hardware, as in the other embodiments, it may be realized by any one or combination of techniques well known in the art, such as a discrete logic circuit having logic gate circuits that realize a logical function for a data signal, a dedicated integrated circuit having appropriate combinational logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0063] In the present description, the recitation of reference terms such as "one embodiment," "some embodiments," "examples," "particular examples," or "some examples" means that at least one embodiment or example of the present application includes the specific feature, structure, material, or characteristic described in conjunction with the embodiment or example. In the present description, general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined as appropriate in any one or more embodiments or examples.

[0064] In addition, in the description of this application, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," "circumferential direction," etc. are merely intended to facilitate and simplify the description of this application as orientations or positional relationships shown based on the drawings, and do not indicate or imply that the devices or parts they refer to necessarily have a specific orientation and are configured and operated in a specific orientation, and therefore cannot be understood as limitations on this application.

[0065] Additionally, the terms "first" and "second" are merely for descriptive purposes and cannot be understood as indicating or implying a relative importance or implying a number of technical features. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include at least one of said features. In the description of this application, "plurality" means at least two, e.g., two, three, etc., unless otherwise expressly and specifically limited.

[0066] In this specification, the terms "attached", "interconnected", "connected", "fixed", etc., should be understood in a broad sense unless otherwise expressly specified and limited, and for example, unless otherwise expressly limited, may be a fixed connection, a removable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. The specific meaning of the above terms in this application can be understood by those skilled in the art according to the specific situation.

[0067] In this application, unless otherwise expressly specified and limited, a first feature being "above" or "below" a second feature means that the first and second features may be in direct contact with each other, or may be in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature means that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature means that the first feature is directly below or diagonally below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0068] Although the embodiments of the present application have been shown and described above, the above embodiments should be understood as illustrative and not restrictive of the present application. Those skilled in the art may change, modify, replace, and alter the above embodiments within the scope of the present application.

Claims

1. A method for suppressing electromagnetic noise in an electromagnetic heating device, comprising: When it is determined that the two adjacent heating modules of the electromagnetic heating device are operated in succession, obtaining the operation start frequency of the subsequent start heating module; and adjusting the operation frequency of the early-start heating module according to the operation start frequency of the late-start heating module so that the two adjacent heating modules operate synchronously at the same operation frequency when the late-start heating module starts operation; In the process of two adjacent heating modules working synchronously, the duty ratios of the PWM signals of the two adjacent heating modules can be independently adjusted between 0% and 50%.

2. The step of adjusting the operation frequency of the early start heating module according to the operation start frequency of the late start heating module includes: The electromagnetic noise suppression method for an electromagnetic heating device as described in claim 1, further comprising a step of controlling the late start heating module to start operating synchronously at the same operating frequency when controlling the operating frequency of the early start heating module to be lowered to the operating start frequency of the late start heating module.

3. The step of adjusting the operation frequency of the early start heating module according to the operation start frequency of the late start heating module includes:

2. The electromagnetic noise suppression method for an electromagnetic heating device as described in claim 1, comprising a step of controlling the advance start heating module to stop operating, and after a predetermined time, controlling the advance start heating module and the delayed start heating module to start operating in synchronization with each other according to the operation start frequency of the delayed start heating module.

4. 4. The method for suppressing electromagnetic noise in an electromagnetic heating device according to claim 1, further comprising maintaining the change trends of the operating frequencies of the two adjacent heating modules so as to match after the two adjacent heating modules operate synchronously at the same operating frequency.

5. 1. A computer-readable storage medium, comprising: A computer-readable storage medium having an electromagnetic noise suppression program for an electromagnetic heating device stored therein, the method for suppressing electromagnetic noise in an electromagnetic heating device according to any one of claims 1 to 4 being realized when the program for suppressing electromagnetic noise in an electromagnetic heating device is executed by a processor.

6. A method for suppressing electromagnetic noise in an electromagnetic heating device, comprising: a memory; a processor; and a program for suppressing electromagnetic noise in an electromagnetic heating device, the program being stored on the memory and executable by the processor; 5. An electromagnetic heating device, wherein the electromagnetic noise suppression method for an electromagnetic heating device according to claim 1 is realized when the electromagnetic noise suppression program is executed by the processor.

7. a first heating module and a second heating module provided corresponding to adjacent heating regions; a first driving module for driving and operating the first heating module; a second driving module for driving the second heating module to operate; a rectification module for rectifying an input AC power source to output a power supply source and supplying the power supply source to the first heating module and the second heating module; a zero-cross detection module for detecting a zero-cross signal of the AC power source; a control module for, when the first heating module is operating and the second heating module needs to be started, obtaining an operation start frequency of the second heating module, generating a first control signal and a second control signal based on the zero-cross signal and the operation start frequency of the second heating module, respectively, adjusting the operation frequency of the first heating module by the first driving module based on the first control signal, and driving and operating the second heating module by the second driving module based on the second control signal, so that the first heating module and the second heating module are operated synchronously at the same operation frequency; In the process of the first heating module and the second heating module operating synchronously, the duty ratios of the PWM signals of the two heating modules can be independently adjusted between 0% and 50%.

8. The heating control system of an electromagnetic heating device as described in claim 7, wherein the control module is further used to control the second driving module to start operating synchronously at the same operating frequency based on the second control signal when the control module controls the first driving module to reduce the operating frequency of the first heating module to the operating start frequency of the second heating module based on the first control signal.

9. The heating control system of an electromagnetic heating device as described in claim 7, wherein the control module is further used to control the first heating module to stop operating, and after a predetermined time, to control the first heating module and the second heating module to start operating synchronously based on the operation start frequency of the second heating module.

10. A heating control system for an electromagnetic heating device described in any one of claims 7 to 9, wherein after the first heating module and the second heating module operate synchronously at the same operating frequency, the change trend of the operating frequency of the first heating module and the change trend of the operating frequency of the second heating module are maintained to be consistent.

11. An electromagnetic heating device comprising the heating control system for the electromagnetic heating device according to any one of claims 7 to 10.

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