Control method and device of electromagnetic heating equipment, equipment and storage medium

Abstract

The invention discloses a control method, device and equipment of electromagnetic heating equipment and a storage medium. The method comprises the following steps: in response to a heating starting instruction, controlling electromagnetic heating equipment to start heating; in the heating process of the electromagnetic heating equipment, the switch-on duration of the switch module in one pulse signal period is controlled, so that the electromagnetic heating equipment meets the low-noise working condition. According to the technical scheme provided by the embodiment of the invention, in the heating process of the electromagnetic heating equipment, the switch-on duration of the switch module in one pulse period is controlled, so that the resonant frequency of the electromagnetic heating circuit is controlled, the resonant frequency of the electromagnetic heating circuit and the inherent frequency of a cooker are kept a large difference, and the electromagnetic heating efficiency is improved. The electromagnetic heating circuit and the cookware are prevented from resonating, or the resonance time of the electromagnetic heating circuit and the cookware is prevented from being too long, so that the electromagnetic noise of the electromagnetic heating equipment in the heating process is reduced.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic heating technology, and in particular to a control method, device, equipment and storage medium for electromagnetic heating equipment. Background Art

[0002] Electromagnetic heating equipment is an electrical device based on the principle of electromagnetic induction. The heating coil and the resonant capacitor in the electromagnetic heating circuit resonate under the drive of the switch module, thereby generating an alternating magnetic field. The pot cuts the magnetic lines of the alternating magnetic field to generate eddy currents, thereby achieving heating.

[0003] Cookware usually has its own natural frequency. When the resonant frequency of the heating coil and the resonant capacitor is the same as or close to the natural frequency of the cookware, the two will resonate. At this time, the electromagnetic heating equipment will generate relatively large electromagnetic noise. Summary of the invention

[0004] The present application proposes a control method, device, equipment and storage medium for electromagnetic heating equipment.

[0005] In a first aspect, an embodiment of the present application provides a control method for an electromagnetic heating device, wherein the electromagnetic heating device includes an electromagnetic heating circuit, and the electromagnetic heating circuit includes a switch module; the method includes: in response to a start heating instruction, controlling the electromagnetic heating device to start heating; during the heating process of the electromagnetic heating device, controlling the opening duration of the switch module in a pulse signal cycle, so that the electromagnetic heating device meets low-noise working conditions; wherein the low-noise working conditions include: the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device do not resonate; or / and, the duration of the resonance between the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device is less than a first preset duration.

[0006] In a second aspect, an embodiment of the present application provides a control device for an electromagnetic heating device, wherein the electromagnetic heating device includes an electromagnetic heating circuit, and the electromagnetic heating circuit includes a switch module; the device includes: a heating module, which is used to control the electromagnetic heating device to start heating in response to a start heating instruction; an on-time control module, which is used to control the on-time of the switch module in a pulse signal cycle during the heating process of the electromagnetic heating device, so that the electromagnetic heating device meets low-noise working conditions; wherein the low-noise working conditions include: the electromagnetic heating circuit does not resonate with the cookware arranged on the electromagnetic heating device; or / and the duration of the resonance between the electromagnetic heating circuit and the cookware arranged on the electromagnetic heating device is less than a first preset duration.

[0007] In a third aspect, an embodiment of the present application provides an electromagnetic heating device, comprising: an electromagnetic heating circuit, the electromagnetic heating circuit including a switch module; one or more processors; a memory; one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, and the one or more applications are configured to execute the method of the first aspect.

[0008] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a program code is stored, and the program code is called by a processor to execute the method of the first aspect.

[0009] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed, is used to implement the method of the first aspect.

[0010] Compared with the prior art, the technical solution provided in the embodiment of the present application controls the resonant frequency of the electromagnetic heating circuit by controlling the opening time of the switch module within a pulse cycle during the heating process of the electromagnetic heating equipment, so that the resonant frequency of the electromagnetic heating circuit maintains a large gap with the natural frequency of the cookware, thereby avoiding resonance between the electromagnetic heating circuit and the cookware, or avoiding the resonance time between the two being too long, thereby reducing electromagnetic noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a schematic diagram of an electromagnetic heating device provided in one embodiment of the present application.

[0013] Figure 2 This is a circuit diagram of an electromagnetic heating circuit provided in one embodiment of the present application.

[0014] Figure 3 It is a flow chart of a control method of an electromagnetic heating device provided by an embodiment of the present application.

[0015] Figure 4 It is a waveform diagram of a pulse width modulation signal provided by an embodiment of the present application.

[0016] Figure 5 It is a schematic diagram of a resonance period provided by an embodiment of the present application.

[0017] Figure 6This is a flow chart of a control method for an electromagnetic heating device provided in another embodiment of the present application.

[0018] Figure 7 This is a flow chart of a control method for an electromagnetic heating device provided in another embodiment of the present application.

[0019] Figure 8 This is a flow chart of a control method for an electromagnetic heating device provided in another embodiment of the present application.

[0020] Fig. 9 It is a schematic diagram of the noise detected by the audio detection device during the control process of the electromagnetic heating device provided by an embodiment of the present application.

[0021] Fig.10 It is a block diagram of a control device for an electromagnetic heating device provided in one embodiment of the present application.

[0022] Fig.11 It is a structural block diagram of an electromagnetic heating device provided in one embodiment of the present application.

[0023] Fig.12 It is a block diagram of a computer-readable storage medium provided by an embodiment of the present application. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0025] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0026] Please refer to Figure 1 , which shows a schematic diagram of an electromagnetic heating device 100 provided by an embodiment of the present application. The electromagnetic heating device 100 can be an electromagnetic cooker, an electromagnetic stove, an electromagnetic hot water kettle, an electromagnetic rice cooker, etc.

[0027] The electromagnetic heating device 100 includes at least one electromagnetic heating circuit 200. Figure 2, which shows a circuit structure diagram of an electromagnetic heating circuit 200 provided in one embodiment of the present application. The electromagnetic heating circuit 200 includes a rectifier module 210, a filter module 220, a resonant capacitor 230, a heating coil 240, a switch module 250, and a micro control unit 260.

[0028] The first end of the rectifier module 210 is connected to the live wire of the mains, the second end is connected to the live wire of the mains, and the third end is grounded. The rectifier module 210 is used to rectify the mains AC signal so that the mains AC signal is converted into a mains DC signal. The rectifier module 210 can be a rectifier bridge. The filter module 220 is connected in parallel with the rectifier module 210. Specifically, the two ends of the filter module 220 are respectively connected to the third end and the fourth end of the rectifier module 210. The filter module 220 is used to filter the mains DC signal output by the rectifier module 210 to filter out high-frequency noise. The filter module 220 can be a filter capacitor. The resonant capacitor 230 is connected in parallel with the heating coil 240, one end of which is connected in parallel to the fourth end of the rectifier module 210, and the other end of which is connected in parallel to the first end of the switch module 250. The second end of the switch module 250 is grounded. The micro control unit 260 is connected to the control end of the switch module 250 and is used to send a pulse width modulation signal to the switch module 250 so that the switch module 250 is periodically turned on.

[0029] When the switch module 250 is turned on, the resonant capacitor 230 and the heating coil 240 generate parallel resonance, and the heating coil 240 generates an alternating magnetic field. When the pot is placed on the stove panel opposite to the heating coil 240, the pot cuts the magnetic field lines of the alternating magnetic field to generate eddy currents, which heat the pot to cook the food. However, the pot has its own natural frequency. When the resonant frequency of the electromagnetic heating circuit 200 (that is, the resonant frequency of the parallel resonance generated by the resonant capacitor 230 and the heating coil 240) is close to or the same as the natural frequency of the pot, the pot resonates with the electromagnetic heating circuit 200, which will generate large electromagnetic noise, affecting the user's experience.

[0030] In an embodiment of the present application, during the heating process of the electromagnetic heating device 100, the opening time of the switch module within a pulse cycle is controlled to achieve control of the resonant frequency of the electromagnetic heating circuit 200, so that the resonant frequency of the electromagnetic heating circuit 200 maintains a large gap with the natural frequency of the cookware, thereby avoiding resonance between the electromagnetic heating circuit 200 and the cookware, or avoiding the resonance time between the two being too long, thereby reducing electromagnetic noise.

[0031] In some embodiments, the electromagnetic heating device 100 is provided with an audio detection device, and during the heating process of the electromagnetic heating device 100, the audio detection device is used to detect the volume of audio information in the environment where the electromagnetic heating device 100 is located. Specifically, the audio detection device is provided on a circuit board integrated with the electromagnetic heating circuit 200, and since the housing of the electromagnetic heating device 100 isolates the circuit board from the outside world, the influence of the external environmental noise is reduced.

[0032] In some embodiments, a speed parameter detection device is also provided on the circuit board integrated with the electromagnetic heating circuit 200, which is used to detect the vibration degree of the electromagnetic heating circuit 200 during the heating process of the electromagnetic heating device 100. When the detection value of the speed detection device is large, it is determined that the vibration degree of the electromagnetic heating circuit 200 is large, and there is a high probability that resonance occurs with the cookware. The speed parameter detection device can be an acceleration sensor.

[0033] In some embodiments, the housing of the electromagnetic heating device 100 includes a stove panel and a control panel. The stove panel is arranged on the side of the housing away from the heating coil 240, and is used to place the pot. The control panel is connected to the micro control unit and is provided with one or more functional controls. When a trigger signal for any functional control is received, the control panel generates a corresponding electrical signal and sends it to the micro control unit. The micro control unit executes the corresponding control instruction according to the electrical signal, thereby realizing the interaction between the user and the electromagnetic heating device 100. The above-mentioned functional controls include but are not limited to: a start control, a gear adjustment control, a time setting control, and the like.

[0034] Please refer to Figure 3 , which shows a flow chart of a control method for an electromagnetic heating device provided by an embodiment of the present application. The method includes the following process.

[0035] S301, in response to a start heating instruction, controlling the electromagnetic heating device to start heating.

[0036] Optionally, the control panel of the electromagnetic heating device includes a start instruction. After receiving a trigger signal for the start instruction, the control unit obtains a start heating instruction, and then the control unit sends a pulse width modulation signal to the switch module to make the switch module periodically turned on. When the switch module is turned on, the resonant capacitor and the heating coil produce parallel resonance, the heating coil generates an alternating magnetic field, and the pot cuts the magnetic lines of force of the alternating magnetic field to generate eddy currents. The eddy currents cause the pot to heat up, and the electromagnetic heating device starts heating.

[0037] S302, during the heating process of the electromagnetic heating device, controlling the opening time of the switch module within a pulse signal cycle, so that the electromagnetic heating device meets the low-noise working condition.

[0038] A pulse signal cycle refers to the time length between two adjacent rising edges of the pulse width modulation signal sent by the microcontroller unit to the switch module. The on-time of the switch module in a pulse signal cycle refers to the duration of the high level in a pulse signal cycle. Figure 4 , which shows a schematic diagram of a pulse width modulation signal provided by an embodiment of the present application, wherein the duration of the period t1-t2 is also a pulse signal cycle, and the duration of the period t1-t3 is also the duration of the switch module being turned on in a pulse signal cycle.

[0039] Combined with reference Figure 5 , which shows a waveform diagram of the resonant oscillation of the resonant capacitor and the resonant inductor provided by an embodiment of the present application. When the microcontroller outputs a high-level turn-on signal of duration t4 (that is, the turn-on duration of the switch module within a pulse signal cycle is t4) to the switch module, the resonant capacitor and the resonant inductor then resonate and oscillate, and the oscillation duration is t5. The sum of t4 and t5 is also the resonant period of the electromagnetic heating circuit. The calculation formula for the resonant frequency of the electromagnetic heating circuit is as follows:

[0040]

[0041] Among them, f is the resonant frequency, T is the resonant period, t4 is the opening time of the switch module in one pulse signal cycle, and t5 is the oscillation time of the resonant oscillation between the resonant capacitor and the heating coil.

[0042] Since the inductance of the heating coil and the capacitance of the resonant capacitor in the electromagnetic heating circuit are fixed parameters, the frequency of the resonant oscillation of the resonant capacitor and the heating coil is basically fixed. When different pots are placed on the electromagnetic heating device, due to the coupling of the pots and the heating coil, the equivalent resonant capacitor and the equivalent resonant inductance change slightly, and this change can be ignored, that is, the frequency of the resonant oscillation of the resonant capacitor and the heating coil is a fixed value, so the oscillation duration of the resonant oscillation (that is, t5) is also a fixed value. According to the calculation formula of the above resonant frequency, it can be determined that adjusting the opening duration of the switch module within a pulse signal cycle can change the resonant frequency of the electromagnetic heating circuit. Specifically, the opening duration of the switch module within a pulse signal cycle is negatively correlated with the resonant frequency of the electromagnetic heating circuit. That is, the greater the opening duration of the switch module within a pulse signal cycle, the smaller the resonant frequency of the electromagnetic heating circuit; the smaller the opening duration of the switch module within a pulse signal cycle, the greater the resonant frequency of the electromagnetic heating circuit.

[0043] The method for controlling the on-time of the switch module within a pulse signal cycle includes at least one of a variable frequency adjustment method and a frequency modulation adjustment method. The specific control method can be found in the following embodiments.

[0044] The low-noise working condition includes that the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device do not resonate; or / and the duration of the resonance between the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device is less than a first preset duration.

[0045] The pot set in the electromagnetic heating device has its own natural frequency. When the difference between the resonant frequency of the electromagnetic heating circuit and the natural frequency of the pot is less than the predetermined difference, that is, when the resonant frequency is the same as or close to the natural frequency of the pot, the two resonate, and a large electromagnetic noise will be generated at this time. In some embodiments, the predetermined difference is set according to experiments or experience, such as 50Hz. In other embodiments, the predetermined difference is the product of the natural frequency of the pot and a predetermined ratio, and the predetermined ratio can be 1%. The first preset duration is the minimum duration of the electromagnetic noise generated by the resonance that the human ear can feel, and is set according to experiments or experience, for example, 1 second.

[0046] In an embodiment of the present application, during the heating process of the electromagnetic heating device, the opening time of the switch module within a pulse cycle is controlled to achieve control of the resonant frequency of the electromagnetic heating circuit, so that the resonant frequency of the electromagnetic heating circuit maintains a large gap with the natural frequency of the cookware, thereby avoiding resonance between the electromagnetic heating circuit and the cookware, or avoiding the resonance time between the two being too long, thereby reducing electromagnetic noise.

[0047] In summary, the technical solution provided in the embodiment of the present application controls the resonant frequency of the electromagnetic heating circuit by controlling the opening time of the switch module within a pulse cycle during the heating process of the electromagnetic heating equipment, so that the resonant frequency of the electromagnetic heating circuit maintains a large gap with the natural frequency of the cookware, thereby avoiding resonance between the electromagnetic heating circuit and the cookware, or avoiding the resonance time between the two being too long, thereby reducing electromagnetic noise.

[0048] Combine the following Figure 6 The frequency conversion adjustment method is explained. Please refer to Figure 6 , which shows a flow chart of a control method for an electromagnetic heating device provided by an embodiment of the present application. The method includes the following process.

[0049] S601, in response to a start heating instruction, controlling the electromagnetic heating device to start heating.

[0050] S602, during the heating process of the electromagnetic heating device, obtaining the current on-time of the switch module in a pulse signal cycle.

[0051] The current on-time of the switch module in a pulse signal cycle can be directly read locally by the microcontroller unit.

[0052] In some embodiments, during the heating process of the electromagnetic heating device, the electromagnetic heating device detects whether the electromagnetic heating circuit resonates with the pot disposed on the electromagnetic heating device. If it is detected that the electromagnetic heating circuit resonates with the pot disposed on the electromagnetic heating device, S602 is executed. If it is detected that the electromagnetic heating circuit does not resonate with the pot disposed on the electromagnetic heating device, the resonance detection continues, and the subsequent process is not executed.

[0053] Optionally, during the heating process of the electromagnetic heating device, the electromagnetic heating device obtains the volume of the environment in which it is located, and when the volume is greater than a second preset decibel, it is determined that the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device; when the volume is less than or equal to the second preset decibel, it is determined that the electromagnetic heating circuit does not resonate with the pot arranged in the electromagnetic heating device.

[0054] In this embodiment, the electromagnetic heating device is provided with an audio detection device. After the electromagnetic heating device starts heating, a start-up instruction is sent to the audio detection device. The audio detection device periodically detects the volume of the audio information in the environment in which the electromagnetic heating device is located according to the start-up instruction. The detection period is set according to experiments or experience. Exemplarily, the detection period is 1 second. The second preset decibel is set according to experiments or experience. Exemplarily, the second preset decibel is 25dB. The volume of the audio information in the environment in which the electromagnetic heating device is located is greater than the second preset decibel, indicating that there is a high probability of electromagnetic noise caused by resonance. Therefore, it is necessary to adjust the opening time of the switch module in a pulse signal cycle to adjust the resonant frequency of the electromagnetic heating circuit, thereby avoiding resonance and reducing electromagnetic noise.

[0055] Optionally, during the heating process of the electromagnetic heating device, the electromagnetic heating device obtains the vibration degree of the electromagnetic heating circuit to obtain a vibration detection value. When the vibration detection value is greater than a first preset value, it is determined that the electromagnetic heating circuit resonates with the cookware arranged in the electromagnetic heating device; when the vibration detection value is less than or equal to the first preset value, it is determined that the electromagnetic heating circuit does not resonate with the cookware arranged in the electromagnetic heating device.

[0056] The vibration detection value is used to characterize the vibration degree of the electromagnetic heating circuit. The larger the vibration detection value, the greater the vibration degree of the electromagnetic heating circuit. In this embodiment, the electromagnetic heating device is provided with a speed parameter detection device, such as an acceleration sensor, and the detection value of the speed parameter detection device is also the vibration detection value. After the electromagnetic heating device starts heating, a start instruction is sent to the speed parameter detection device, and the speed parameter detection device periodically detects the vibration degree of the electromagnetic heating circuit according to the start instruction. The detection cycle is set according to experiments or experience, and illustratively, the detection cycle is 1 second. The first preset value is set according to experiments or experience, and the embodiment of the present application is not limited to this. The detection value of the speed parameter detection device is greater than the first preset value, indicating that the vibration degree of the circuit board where the electromagnetic heating circuit is located is large, and the electromagnetic heating circuit and the cookware are likely to resonate, so it is necessary to adjust the opening time of the switch module in a pulse signal cycle to adjust the resonant frequency of the electromagnetic heating circuit, thereby avoiding resonance and reducing electromagnetic noise.

[0057] S603: Determine a first duration sequence based on the current activation duration.

[0058] The first duration sequence includes a plurality of activation durations. The embodiment of the present application does not limit the number of activation durations included in the first duration sequence, for example, 10.

[0059] In the embodiment of the present application, the microcontroller unit expands the sequence based on the activation duration to obtain a first duration sequence. Specifically, during the first expansion process, the microcontroller unit increases the current activation duration by a first fixed value to obtain an activation duration in the first duration sequence, and subtracts the first fixed value from the current activation duration to obtain another activation duration in the first duration sequence, and then repeats the above steps, wherein during the i-th expansion process, the current activation duration is increased by i times the first fixed value to obtain an activation duration in the first duration sequence, and the current activation duration is subtracted by i times the first fixed value to obtain an activation duration in the first duration sequence, where i is an integer greater than 1.

[0060] The fixed value can be set according to experiments or experience, such as 0.5s. For example, the current activation duration is 5s, and the fixed value is 0.5s. Then the first duration sequence determined based on the current activation duration is [5.5, 4.5, 6, 4, 6.5, 3.5, 7, 3, 7.5, 2.5 ...].

[0061] S604: According to the first duration sequence, the on-time of the switch module in one pulse signal cycle is adjusted every second preset time.

[0062] The second preset time length is set according to experiments or experience, and the second preset time length can be any value greater than 1 us and less than 1s, for example, 1000 us.

[0063] The microcontroller unit adjusts the on-time of the switch module in one pulse signal cycle every second preset time according to the arrangement order of each on-time in the first time sequence. In the kth adjustment process, the on-time of the switch module in one pulse signal cycle is adjusted to the kth on-time in the first time sequence, where k is a positive integer.

[0064] In some embodiments, during the control process of the on-time, it is detected whether the electromagnetic heating circuit and the cookware set in the electromagnetic heating device have exited resonance; if it is detected that the electromagnetic heating circuit and the cookware set in the electromagnetic heating device have exited resonance, the control process of the on-time is ended; if it is detected that the electromagnetic heating circuit and the cookware set in the electromagnetic heating device have exited resonance, the control process of the on-time is continued.

[0065] Optionally, during the control of the activation time, the electromagnetic heating device obtains the volume of the environment in which it is located. When the volume is less than a fourth preset decibel, it is determined that the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device have exited resonance; when the volume is greater than or equal to the fourth preset decibel, it is determined that the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device have not exited resonance.

[0066] During the control of the opening duration, the audio detection device also periodically detects the volume of the audio information in the environment in which the electromagnetic heating equipment is located. The detection period is determined according to the second preset duration to monitor the volume of the audio information in the environment in which the electromagnetic heating equipment is located after each adjustment. The fourth preset decibel is less than the second preset decibel, and the fourth preset decibel is set according to experiments or experience. Exemplarily, the fourth preset decibel is 15dB. In this embodiment, the audio detection device still monitors the volume of the audio information in the environment in which the electromagnetic heating equipment is located. When it is detected that the volume of the audio information detected by the audio detection device is less than the fourth preset decibel, it is determined that the noise in the environment in which the electromagnetic heating equipment is located is reduced, and it is highly likely that the resonance between the pot and the electromagnetic heating circuit disappears, and the adjustment process is terminated at this time.

[0067] Optionally, during the control of the opening time, the electromagnetic heating device obtains the vibration degree of the electromagnetic heating circuit to obtain a vibration detection value. When the vibration detection value is less than a third preset value, it is determined that the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device have exited resonance; when the vibration detection value is greater than or equal to the third preset value, it is determined that the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device have not exited resonance.

[0068] During the control of the opening time, the speed parameter detection device also periodically detects the vibration degree of the electromagnetic heating circuit. The detection period is determined according to the second preset time to monitor the volume of the audio information in the environment where the electromagnetic heating device is located after each adjustment. The third preset value is less than the first preset value. The detection value of the speed parameter detection device is less than the third preset value, indicating that the vibration degree of the circuit board where the electromagnetic heating circuit is located is small, and the resonance between the electromagnetic heating circuit and the cookware disappears, thus ending the adjustment process. It should be noted that after entering the adjustment process, the detection period of the speed parameter detection device can be determined according to the second preset time to monitor the vibration degree of the electromagnetic heating circuit after each adjustment.

[0069] In other embodiments, before the electromagnetic heating device controls the on-time of the switch module in a pulse signal cycle, the electromagnetic heating device obtains a first volume of the environment in which the electromagnetic heating device is located; when the number of adjustments to the on-time is greater than a preset number, the second volume of the environment in which the electromagnetic heating device is located is obtained; if the difference between the first volume and the second volume is less than a first preset decibel, the adjustment process of the on-time is terminated. The preset number of times can be set based on experiments or experience, for example, the preset number of times is the number of on-times included in the first time series. The second preset decibel is set based on experiments or experience, for example, the second preset decibel is 3dB.

[0070] Since the audio information detected by the audio detection device includes environmental noise in addition to electromagnetic noise, in this embodiment, the audio detection device still monitors the volume of the audio information in the environment of the electromagnetic heating equipment. When it is detected that the difference between the volume of the audio information detected by the audio detection device before the adjustment starts and the volume of the audio information detected after multiple adjustments is small, it is determined that the main component of the audio information detected by the audio detection device is environmental noise rather than electromagnetic noise, and there is a high probability that no resonance occurs between the cookware and the electromagnetic heating equipment, and the adjustment process is terminated at this time.

[0071] In summary, the technical solution provided by the embodiment of the present application, when it is detected that the volume of the audio information in the environment where the electromagnetic heating device is located is relatively high, or when it is detected that the vibration level of the circuit board integrated with the electromagnetic heating circuit is relatively high, the adjustment process of the opening time length of the switch module in a pulse signal cycle is started, and the electromagnetic heating circuit resonates with the cookware, or the resonance time between the two is avoided to be too long, thereby reducing electromagnetic noise. In the process of adjusting the opening time length of the switch module in a pulse signal cycle, if it is detected that the volume of the audio information in the environment where the electromagnetic heating device is located is relatively low, or when it is detected that the vibration level of the circuit board integrated with the electromagnetic heating circuit is relatively low, the above adjustment process is terminated, thereby saving the power consumption of the electromagnetic heating device. In addition, the above adjustment process is terminated when the number of adjustments is large, but the volume of the audio information in the environment where the electromagnetic heating device is located does not change significantly before and after the adjustment, thereby saving the power consumption of the electromagnetic heating device.

[0072] Combine the following Figure 7 The frequency hopping adjustment method is explained. Please refer to Figure 7 , which shows a flow chart of a control method for an electromagnetic heating device provided by an embodiment of the present application. The method includes the following process.

[0073] S701, in response to a start heating instruction, controlling the electromagnetic heating device to start heating.

[0074] S702, during the heating process of the electromagnetic heating device, obtaining a specified frequency.

[0075] The specified frequency represents the frequency at which the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device.

[0076] In some embodiments, when the volume of the environment in which the electromagnetic heating device is located is greater than a third preset decibel, the current resonant frequency of the electromagnetic heating circuit is determined to be a specified frequency. The third preset decibel may be the same as or different from the second preset decibel. In the embodiments of the present application, only the example in which the third preset decibel is the same as the second preset decibel is used for illustration. In this embodiment, the audio detection device still monitors the volume of the audio information in the environment in which the electromagnetic heating device is located. When it is detected that the volume of the audio information detected by the audio detection device is greater than the third preset decibel, the electromagnetic heating circuit and the cookware are likely to resonate. At this time, the current resonant frequency of the electromagnetic heating circuit is determined to be the specified frequency.

[0077] In other embodiments, when the vibration detection value characterizing the vibration degree of the electromagnetic heating circuit is greater than a second preset value, the current resonant frequency of the electromagnetic heating circuit is determined as the specified frequency. The second preset value and the first preset value may be the same or different. In this embodiment, the speed parameter detection device still monitors the vibration degree of the circuit board where the electromagnetic heating circuit is located. When it is detected that the detection value of the speed parameter detection device is greater than the second preset value, it is determined that the vibration degree of the above-mentioned circuit board is large, and the electromagnetic heating circuit and the cookware are likely to resonate. At this time, the current resonant frequency of the electromagnetic heating circuit is determined as the specified frequency.

[0078] In other embodiments, the micro control unit identifies the cookware and obtains identification information of the cookware; and searches for a frequency corresponding to the identification information of the cookware in a preset mapping relationship as the designated frequency.

[0079] There are several ways to identify the cookware: In one possible implementation, the electromagnetic heating device is provided with an image acquisition device, which captures the image of the cookware, and then recognizes the image of the cookware to obtain the identification information of the cookware. In another possible implementation, the cookware is provided with an electronic tag, and the electromagnetic heating device is provided with an electronic tag recognition device, which recognizes the electronic tag to determine the identification information of the cookware.

[0080] The preset mapping relationship includes a mapping relationship between different cookware and different frequencies. In some embodiments, the preset mapping relationship is determined based on experimental measurements. In other embodiments, the preset mapping relationship is determined based on historical usage data of the cookware. Specifically, during the first heating of the cookware by the electromagnetic heating device, if the volume of the environmental information detected by the audio detection device is greater than a fourth preset decibel, the current resonant frequency of the electromagnetic heating circuit is recorded and stored in correspondence with the identification information of the cookware.

[0081] S703: Determine a target frequency interval based on the designated frequency.

[0082] When the resonant frequency of the electromagnetic heating circuit belongs to the target frequency interval, the electromagnetic heating circuit resonates with the cookware. The difference between the lower boundary value of the target frequency interval and the specified frequency is less than the first preset difference, and the difference between the upper boundary value corresponding to the target frequency interval and the specified frequency is less than the second preset difference. The first preset difference and the second preset difference may be the same or different. In the embodiment of the present application, only the example that the first preset difference and the second preset difference are the same is used for explanation. For example, the specified frequency is 20KHz, the first preset difference and the second preset difference are both 200Hz, and the target frequency interval is [19.8KHz, 20.2KHz].

[0083] S704: Control the on-time of the switch module in one pulse signal cycle so that the resonant frequency of the electromagnetic heating circuit does not belong to the target frequency range.

[0084] In an embodiment of the present application, by controlling the opening time of the switch module in a pulse signal cycle, the resonant frequency of the electromagnetic heating circuit is controlled not to belong to the target frequency range, thereby avoiding resonance between the electromagnetic heating circuit and the cookware, and reducing electromagnetic noise.

[0085] In some embodiments, S704 is specifically implemented as follows: determining a frequency sequence based on a target frequency interval; determining a second time sequence based on the frequency sequence, the second time sequence including on-times corresponding to multiple frequencies; according to the second time sequence, adjusting the on-time of the switch module in a pulse signal cycle every third preset time.

[0086] The frequency sequence includes multiple frequencies, and multiple frequencies do not belong to the target frequency interval. The embodiment of the present application does not limit the number of frequencies included in the target frequency interval. In some embodiments, the microcontroller unit is expanded based on the lower boundary value and the upper boundary value of the target frequency interval, respectively, to obtain a frequency sequence. Specifically, during the first expansion process, the microcontroller unit subtracts a second fixed value from the lower boundary value to obtain a frequency, and increases the upper boundary value by a second fixed value to obtain a frequency, and then repeats the above steps, wherein, during the p-th expansion process, the lower boundary value is subtracted by p times of a second fixed value to obtain a frequency, and the upper boundary value is increased by p times of a second fixed value to obtain a frequency, and p is an integer greater than 1. The second fixed value is set according to experiments or experience, such as the second fixed value is 200Hz. Exemplarily, the frequencies included in the frequency sequence are [19.6, 20.4, 19.4, 20.6, 19.2...] in sequence.

[0087] The second duration sequence includes the on-times corresponding to the multiple frequencies. For each frequency, the microcontroller unit calculates the resonance duration based on the frequency formula, and subtracts the oscillation duration of the resonant oscillation of the resonant capacitor and the heating coil from the resonance duration to obtain the on-time of the switch module corresponding to the resonant frequency within a pulse signal cycle.

[0088] The microcontroller unit adjusts the on-time of the switch module in one pulse signal cycle every third preset time period according to the arrangement order of each on-time in the second time sequence. This process is also called frequency hopping adjustment method. Among them, in the qth adjustment process, the on-time of the switch module in one pulse signal cycle is adjusted to the qth on-time in the second time sequence, and q is a positive integer. The third preset time is set according to experiments or experience, for example, the third preset time is 2s. It should be noted that when the number of adjustments is greater than or equal to the number of on-times included in the second time sequence, the microcontroller unit can repeat the above adjustment steps starting from the first on-time of the second time sequence.

[0089] The adjustment method of the on-time provided in this embodiment can be called a frequency hopping adjustment method, so that the average heating power of the electromagnetic heating circuit can be made to approach the set heating power.

[0090] In other embodiments, S704 is specifically implemented as follows: determining a target frequency based on a target frequency interval, the target frequency does not belong to the target frequency interval; determining a target on-time based on the target frequency; and adjusting the on-time of the switch module in a pulse signal cycle to the target on-time.

[0091] The electromagnetic heating device can randomly determine a target frequency from the frequencies that do not belong to the target frequency range, and can also obtain the expected heating power, calculate the expected frequency based on the expected heating power, and then determine the frequency that does not belong to the target frequency range and has the smallest difference with the expected frequency as the target frequency. For the target frequency, the microcontroller unit calculates the target resonance duration based on the frequency formula, and subtracts the oscillation duration of the resonant oscillation of the resonant capacitor and the heating coil from the target resonance duration, that is, the target opening duration corresponding to the target frequency is obtained.

[0092] In summary, the technical solution provided in the embodiment of the present application predetermines the frequency at which the electromagnetic heating circuit resonates with the cookware arranged on the electromagnetic heating device during the heating process of the electromagnetic heating device, and then determines the target frequency range based on the frequency. Thereafter, the opening duration of the switch module in a pulse signal cycle is controlled so that the resonant frequency of the electromagnetic heating circuit does not belong to the target frequency range, thereby avoiding resonance between the electromagnetic heating circuit and the cookware and reducing electromagnetic noise.

[0093] The following describes the combination of variable frequency adjustment and frequency hopping adjustment. Figure 8 , which shows a flow chart of a control method for an electromagnetic heating device provided by an embodiment of the present application. The method includes the following process.

[0094] S801, in response to a start heating instruction, controlling the electromagnetic heating device to start heating.

[0095] S802, during the heating process of the electromagnetic heating device, detecting whether the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device.

[0096] In some embodiments, during the heating process of the electromagnetic heating device, the volume of the audio in the environment of the electromagnetic heating device is detected to detect whether the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device.

[0097] In other embodiments, during the heating process of the electromagnetic heating device, the vibration degree of the electromagnetic heating circuit is detected to detect whether the electromagnetic heating circuit and the pot arranged in the electromagnetic heating device resonate.

[0098] S803, when resonance is detected between the electromagnetic heating circuit and the pot arranged in the electromagnetic heating device, starting the variable frequency adjustment mode.

[0099] When the volume of the environment in which the electromagnetic heating device is located is greater than a second preset decibel, it is determined that the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device.

[0100] When the vibration detection value representing the vibration degree of the electromagnetic heating circuit is greater than a first preset value, it is determined that the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device.

[0101] In the variable frequency adjustment mode, the electromagnetic heating device obtains the current on-time of the switch module in a pulse signal cycle; determines a first time sequence based on the current on-time, wherein the first time sequence includes multiple on-times; according to the first time sequence, the on-time of the switch module in a pulse signal cycle is adjusted every second preset time.

[0102] S804, in the variable frequency adjustment mode, detecting whether the electromagnetic heating circuit and the pot arranged in the electromagnetic heating device have exited resonance.

[0103] In some embodiments, in the variable frequency adjustment mode, the volume of the audio in the environment where the electromagnetic heating device is located is detected to detect whether the electromagnetic heating circuit and the pot arranged in the electromagnetic heating device have exited resonance.

[0104] In other embodiments, in the variable frequency adjustment mode, the vibration degree of the electromagnetic heating circuit is detected to detect whether the electromagnetic heating circuit and the pot arranged in the electromagnetic heating device are out of resonance.

[0105] S805, when it is detected that the electromagnetic heating circuit and the pot arranged in the electromagnetic heating device have exited resonance, starting the frequency hopping adjustment mode.

[0106] When the volume of the environment in which the electromagnetic heating device is located is less than the fourth preset decibel, it is determined that the electromagnetic heating circuit and the pot set in the electromagnetic heating device have exited resonance. The fourth preset decibel is less than the second preset decibel. When the vibration detection value representing the vibration degree of the electromagnetic heating circuit is less than the third preset value, it is determined that the electromagnetic heating circuit and the pot set in the electromagnetic heating device have exited resonance. The third preset value is less than the first preset value.

[0107] In the frequency hopping adjustment mode, the electromagnetic heating device determines a specified frequency, determines a target frequency range based on the specified frequency, determines a frequency sequence based on the target frequency range, the frequency sequence includes multiple frequencies, and the multiple frequencies do not belong to the target frequency range; determines a second time length sequence based on the frequency sequence, the second time length sequence includes opening times corresponding to multiple resonant frequencies respectively; according to the second time length sequence, the opening time of the switch module in a pulse signal cycle is adjusted every third preset time length.

[0108] The designated frequency represents the frequency at which the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device. The difference between the lower boundary value of the target frequency interval and the designated frequency is less than the first preset difference, and the difference between the upper boundary value corresponding to the target frequency interval and the designated frequency is less than the second preset difference.

[0109] Combined with reference Fig. 9 , which shows a schematic diagram of the noise detected by the audio detection device during the control process of the electromagnetic heating device provided by an embodiment of the present application. The t6-t7 stage is the startup stage of the electromagnetic heating device. In this stage, the noise detected by the audio detection device gradually increases; the t7-t8 stage is the stage where the volume of the audio information detected by the audio detection device is greater than the second preset decibel, and this stage can be regarded as the stage where the electromagnetic heating circuit and the cookware resonate; the t8-t9 stage is the variable frequency modulation stage. In this stage, the electromagnetic heating device adjusts the opening time of the switch module in a pulse signal cycle until the volume of the audio information detected by the audio detection device is less than the second preset decibel. After t9 is the frequency hopping adjustment stage. In this stage, the electromagnetic heating device heats according to the preset frequency sequence. According to Fig. 9 It can be seen that both the variable frequency adjustment mode and the frequency modulation adjustment mode of the electromagnetic heating equipment can reduce electromagnetic noise.

[0110] To summarize, the technical solution provided in the embodiment of the present application, when it is detected that the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device resonate, starts the frequency conversion adjustment mode to make the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device exit the resonance; and also when it is detected that the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device exit the resonance, starts the frequency hopping adjustment mode to make the average heating power of the electromagnetic heating circuit approach the set power.

[0111] Combined with reference Fig.10 , which shows a structural diagram of a control device for an electromagnetic heating circuit provided by an embodiment of the present application. The electromagnetic heating device includes an electromagnetic heating circuit, and the electromagnetic heating circuit includes a switch module; the device includes: a heating module 1010 and an opening time control module 1020.

[0112] The heating module 1010 is used to control the electromagnetic heating device to start heating in response to a start heating instruction.

[0113] The on-time control module 1020 is used to control the on-time of the switch module in a pulse signal cycle during the heating process of the electromagnetic heating device, so that the electromagnetic heating device meets the low-noise working condition. The low-noise working condition includes: the electromagnetic heating circuit and the pot set in the electromagnetic heating device do not resonate; or / and the time duration of the electromagnetic heating circuit and the pot set in the electromagnetic heating device resonating is less than a first preset time duration.

[0114] In some embodiments, the on-duration control module 1020 is used to obtain the current on-duration of the switch module in a pulse signal cycle; determine a first duration sequence based on the current on-duration, wherein the first duration sequence includes multiple on-durations; and adjust the on-duration of the switch module in a pulse signal cycle every second preset duration according to the first duration sequence.

[0115] In some embodiments, the device further includes a volume detection module (not shown in the figure). The volume detection module is used to obtain a first volume of the environment in which the electromagnetic heating device is located before controlling the on-time of the switch module in a pulse signal cycle; and to obtain a second volume of the environment in which the electromagnetic heating device is located when the number of times the on-time is adjusted is greater than a preset number.

[0116] The activation duration control module 1020 is further configured to terminate the activation duration adjustment process if the difference between the first volume and the second volume is less than a first preset decibel.

[0117] In some embodiments, the device further includes: a resonance detection module (not shown in the figure). The resonance detection module is used to detect whether the electromagnetic heating circuit and the pot set in the electromagnetic heating device resonate during the heating process of the electromagnetic heating device. The opening duration control module 1020 is also used to perform the step of controlling the opening duration of the switch module in a pulse signal cycle when it is detected that the electromagnetic heating circuit resonates with the pot set in the electromagnetic heating device.

[0118] In some embodiments, the resonance detection module is used to:

[0119] The volume of the environment in which the electromagnetic heating device is located is obtained, and when the volume is greater than a second preset decibel, it is determined that the electromagnetic heating circuit resonates with the cookware arranged in the electromagnetic heating device; or / and, the vibration degree of the electromagnetic heating circuit is obtained to obtain a vibration detection value, and when the vibration detection value is greater than a first preset value, it is determined that the electromagnetic heating circuit resonates with the cookware arranged in the electromagnetic heating device.

[0120] In some embodiments, the resonance detection module is further used to detect whether the electromagnetic heating circuit and the pot set in the electromagnetic heating device have exited resonance during the control process of the opening time. The opening time control module 1020 is used to end the control process of the opening time if it is detected that the electromagnetic heating circuit and the pot set in the electromagnetic heating device have exited resonance.

[0121] In some embodiments, the on-time control module 1020 is used to obtain a specified frequency, which represents the frequency at which the electromagnetic heating circuit resonates with the cookware set in the electromagnetic heating device; determine the target frequency range based on the specified frequency, the difference between the lower boundary value of the target frequency range and the specified frequency is less than the first preset difference, and the difference between the upper boundary value corresponding to the target frequency range and the specified frequency is less than the second preset difference; control the on-time of the switch module in a pulse signal cycle so that the resonant frequency of the electromagnetic heating circuit does not belong to the target frequency range.

[0122] In some embodiments, the on-time control module 1020 is used to determine a frequency sequence based on a target frequency interval, the frequency sequence includes multiple frequencies, and the multiple frequencies do not belong to the target frequency interval; determine a second time sequence based on the frequency sequence, the second time sequence includes on-times corresponding to the multiple frequencies respectively; according to the second time sequence, the on-time of the switch module in a pulse signal cycle is adjusted every third preset time.

[0123] In some embodiments, the on-time control module 1020 is used to determine the target frequency based on the target frequency interval, and the target frequency does not belong to the target frequency interval; based on the target frequency, determine the target on-time; adjust the on-time of the switch module in a pulse signal cycle to the target on-time.

[0124] In some embodiments, the duration control module 1020 is turned on to determine the current resonant frequency of the electromagnetic heating circuit as the specified frequency when the volume of the environment in which the electromagnetic heating equipment is located is greater than a third preset decibel; or / and, when a vibration detection value characterizing the vibration degree of the electromagnetic heating circuit is greater than a second preset value, determine the current resonant frequency of the electromagnetic heating circuit as the specified frequency.

[0125] In some embodiments, the duration control module 1020 is turned on to identify the cookware and obtain the identification information of the cookware; the frequency corresponding to the identification information of the cookware is searched in a preset mapping relationship as the designated frequency, and the preset mapping relationship includes a mapping relationship between different cookware and different frequencies.

[0126] In summary, the technical solution provided in the embodiment of the present application controls the resonant frequency of the electromagnetic heating circuit by controlling the opening time of the switch module within a pulse cycle during the heating process of the electromagnetic heating equipment, so that the resonant frequency of the electromagnetic heating circuit maintains a large gap with the natural frequency of the cookware, thereby avoiding resonance between the electromagnetic heating circuit and the cookware, or avoiding the resonance time between the two being too long, thereby reducing electromagnetic noise.

[0127] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0128] In several embodiments provided in the present application, the coupling between modules may be electrical, mechanical or other forms of coupling.

[0129] In addition, each functional module in each embodiment of the present application can be integrated into a processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.

[0130] like Fig.11 As shown, the present application example further provides an electromagnetic heating device 1100, and the electromagnetic heating device 1100 includes a processor 1110 and a memory 1120. The memory 1120 stores computer program instructions.

[0131] The processor 1110 may include one or more processing cores. The processor 1111 uses various interfaces and lines to connect various parts of the entire battery management system, and executes various functions and processes data of the battery management system by running or executing instructions, programs, code sets or instruction sets stored in the memory 1120, and calling data stored in the memory 1120. Optionally, the processor 1110 can be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 1110 can integrate one or more combinations of a central processing unit 1111 (CPU), a graphics processor 1110 (GPU), and a modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 1110, but may be implemented separately through a communication chip.

[0132] The memory 1120 may include a random access memory 1120 (Random Access Memory, RAM), and may also include a read-only memory 1120 (Read-Only Memory). The memory 1120 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 1120 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playback function, etc.), instructions for implementing the following various method examples, etc. The data storage area may also store data created by the electromagnetic heating device during use, etc.

[0133] See also Fig.12 , which shows that an embodiment of the present application also provides a computer-readable storage medium 1200, in which computer program instructions 1210 are stored. The computer program instructions 1210 can be called by a processor to execute the method described in the above embodiment.

[0134] The computer-readable storage medium 1200 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer-readable storage medium 1200 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 1200 has storage space for computer program instructions 1210 for executing any method steps in the above method. These computer program instructions 1210 may be read from or written to one or more computer program products. The computer program instructions 1210 may be compressed in an appropriate form.

[0135] The above are only preferred examples of the present application and are not intended to limit the present application in any form. Although the present application has been disclosed as the preferred examples above, they are not intended to limit the present application. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent examples with equivalent changes without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above examples based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A control method for an electromagnetic heating device, characterized in that: The electromagnetic heating device comprises an electromagnetic heating circuit, and the electromagnetic heating circuit comprises a switch module; the method comprises: In response to a start heating instruction, controlling the electromagnetic heating device to start heating; During the heating process of the electromagnetic heating device, the on-time of the switch module in a pulse signal cycle is controlled so that the electromagnetic heating device meets the low-noise working condition; Among them, the low-noise working conditions include: the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device do not resonate; or / and the duration of the resonance between the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device is less than a first preset duration.

2. The method according to claim 1, characterized in that: The controlling of the on-time of the switch module in a pulse signal cycle includes: Obtaining the current on-time of the switch module in one pulse signal cycle; Determine a first duration sequence based on the current activation duration, wherein the first duration sequence includes multiple activation durations; According to the first duration sequence, the on-time of the switch module in one pulse signal cycle is adjusted every second preset time.

3. The method according to claim 2, characterized in that The method further comprises: Before controlling the on-time of the switch module in a pulse signal cycle, obtaining a first volume of the environment in which the electromagnetic heating device is located; When the number of times the opening duration is adjusted is greater than a preset number, obtaining a second volume of the environment in which the electromagnetic heating device is located; If the difference between the first volume and the second volume is less than a first preset decibel, the process of adjusting the activation time is terminated.

4. The method according to any one of claims 1 to 3, characterized in that: Before controlling the on-time of the switch module in a pulse signal cycle, the method further includes: During the heating process of the electromagnetic heating device, detecting whether the electromagnetic heating circuit resonates with a pot arranged on the electromagnetic heating device; If it is detected that the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device, the step of controlling the opening time length of the switch module in one pulse signal cycle is performed.

5. The method according to claim 4, characterized in that The detecting whether the electromagnetic heating circuit resonates with the pot arranged on the electromagnetic heating device comprises: Acquiring the volume of the environment in which the electromagnetic heating device is located, and determining that the electromagnetic heating circuit resonates with the pot arranged in the electromagnetic heating device when the volume is greater than a second preset decibel; or / and, The vibration degree of the electromagnetic heating circuit is obtained to obtain a vibration detection value. When the vibration detection value is greater than a first preset value, it is determined that the electromagnetic heating circuit resonates with a cookware arranged in the electromagnetic heating device.

6. The method according to claim 4, characterized in that The method further comprises: During the control of the on-time, detecting whether the electromagnetic heating circuit and the pot arranged in the electromagnetic heating device have exited resonance; If it is detected that the electromagnetic heating circuit and the pot arranged on the electromagnetic heating device have exited resonance, the control process of the opening time is terminated.

7. The method according to claim 1, characterized in that The controlling of the on-time of the switch module in a pulse signal cycle includes: Acquire a specified frequency, where the specified frequency represents a frequency at which the electromagnetic heating circuit resonates with a cookware disposed on the electromagnetic heating device; Determine a target frequency interval based on the designated frequency, wherein a difference between a lower boundary value of the target frequency interval and the designated frequency is less than a first preset difference, and a difference between an upper boundary value corresponding to the target frequency interval and the designated frequency is less than a second preset difference; The on-time of the switch module in a pulse signal cycle is controlled so that the resonant frequency of the electromagnetic heating circuit does not belong to the target frequency range.

8. The method according to claim 7, characterized in that The controlling the on-time of the switch module in a pulse signal cycle so that the resonant frequency of the electromagnetic heating circuit does not belong to the target frequency range includes: Determine a frequency sequence based on the target frequency interval, the frequency sequence including a plurality of frequencies, and a plurality of the frequencies do not belong to the target frequency interval; Determine a second duration sequence based on the frequency sequence, the second duration sequence including activation durations corresponding to the plurality of frequencies respectively; According to the second time sequence, the on time of the switch module in one pulse signal cycle is adjusted every third preset time.

9. The method according to claim 7, characterized in that: The controlling the on-time of the switch module in a pulse signal cycle so that the resonant frequency of the electromagnetic heating circuit does not belong to the target frequency range includes: determining a target frequency based on the target frequency interval, the target frequency not belonging to the target frequency interval; Based on the target frequency, determining a target activation duration; The on-time of the switch module in one cycle of the pulse signal is adjusted to the target on-time.

10. The method according to any one of claims 7 to 9, characterized in that The obtaining of the specified frequency comprises: When the volume of the environment in which the electromagnetic heating device is located is greater than a third preset decibel, determining the current resonant frequency of the electromagnetic heating circuit as a specified frequency; or / and, When the vibration detection value characterizing the vibration degree of the electromagnetic heating circuit is greater than a second preset value, the current resonance frequency of the electromagnetic heating circuit is determined as the designated frequency.

11. The method according to any one of claims 7 to 9, characterized in that: The obtaining of the specified frequency comprises: Identify the cookware and obtain identification information of the cookware; A frequency corresponding to the identification information of the cookware is searched in a preset mapping relationship as the designated frequency, wherein the preset mapping relationship includes a mapping relationship between different cookware and different frequencies.

12. A control device for electromagnetic heating equipment, characterized in that: The electromagnetic heating device comprises an electromagnetic heating circuit, and the electromagnetic heating circuit comprises a switch module; the device comprises: A heating module, used for controlling the electromagnetic heating device to start heating in response to a start heating instruction; An on-time control module, used to control the on-time of the switch module in a pulse signal cycle during the heating process of the electromagnetic heating device, so that the electromagnetic heating device meets the low-noise working condition; Among them, the low-noise working conditions include: the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device do not resonate; or / and the duration of the resonance between the electromagnetic heating circuit and the cookware arranged in the electromagnetic heating device is less than a first preset duration.

13. An electromagnetic heating device, characterized in that: The electromagnetic heating device comprises: An electromagnetic heating circuit, wherein the electromagnetic heating circuit comprises a switch module; one or more processors; Memory; One or more applications, wherein one or more of the applications are stored in the memory and configured to be executed by one or more of the processors, and one or more of the applications are configured to execute the method according to any one of claims 1 to 11.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, and the program codes are called by a processor to execute the method according to any one of claims 1 to 11.

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