Heating control method and device of cooking equipment, storage medium and cooking equipment

Abstract

The invention provides a heating control method and device of cooking equipment, a storage medium and the cooking equipment, and relates to the technical field of cooking equipment.The method comprises the steps that in response to a cooking instruction, the type of a pot is obtained, and the cooking instruction indicates target heating power; under the condition that the type of the cookware is the first type, the switching device is controlled to be switched on and off at the first switching frequency according to the target heating power, so that the coil assembly forms eddy current in the cookware; or under the condition that the type of the cookware is a second type, controlling the switching device to switch at a second switching frequency according to the target heating power, so that the coil assembly emits heat and heats the cookware; wherein the magnetic permeability of the first type of cookware is higher than that of the second type of cookware, and the first switching frequency is lower than the second switching frequency.

Description

Technical Field

[0001] The present application relates to the technical field of cooking appliances, and more particularly, to a heating control method, device, storage medium, and cooking appliance for a cooking appliance. Background Art

[0002] In the related art, induction heating appliances such as induction cookers belong to flameless heating, with fast heating speed and high safety. However, induction heating appliances have poor compatibility with the material and shape of cookware. For example, they can achieve better heating power and heating effect for metal cookware with high magnetic permeability, while they cannot heat non-metal cookware with low magnetic permeability, resulting in poor versatility of induction heating cooking appliances. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present application provides a heating control method for a cooking appliance.

[0005] A second aspect of the present application provides a heating control device for a cooking appliance.

[0006] A third aspect of the present application provides a heating control device for a cooking appliance.

[0007] A fourth aspect of the present application provides a readable storage medium.

[0008] A fifth aspect of the present application provides a cooking appliance.

[0009] In view of this, a first aspect of the present application provides a heating control method for a cooking appliance. The cooking appliance includes a switching device and a coil assembly, the switching device is electrically connected to the coil assembly, and the coil assembly is used to heat a cookware. The method includes: in response to a cooking instruction, obtaining the type of the cookware, where the cooking instruction indicates a target heating power;

[0010] When the type of the cookware is the first type, controlling the switching device to switch at a first switching frequency according to the target heating power, so that an eddy current is formed in the cookware by the coil assembly; or when the type of the cookware is the second type, controlling the switching device to switch at a second switching frequency according to the target heating power, so that the coil assembly generates heat and heats the cookware; where the magnetic permeability of the cookware of the first type is higher than that of the cookware of the second type, and the first switching frequency is lower than the second switching frequency.

[0011] In this technical solution, the cooking device can be an induction heating electromagnetic cooker, a multi-head stove, a rice cooker, an electric pressure cooker, or other cooking devices. The cooking device includes a switching device and a coil assembly. Exemplarily, the switching device is a high-frequency power inverter switching device, such as an IGBT (Insulated Gate Bipolar Transistor) switching device or a MOS (Metal Oxide Semiconductor) switching device.

[0012] The switching device is electrically connected to the coil assembly. Exemplarily, the switching device can be electrically connected to the coil assembly through a reactive power compensation resonant circuit. A resonant capacitor is provided in the reactive power compensation resonant circuit. Through the high-frequency switching action of the switching device, oscillations are generated between the coil assembly and the resonant capacitor, and eddy currents can be generated in a metal cookware with high magnetic permeability, thereby realizing the heating of the cookware.

[0013] In the related art, the above-mentioned induction heating appliance is only applicable to metal cookware with high magnetic permeability. For cookware with low magnetic permeability, such as some non-metal cookware, including ceramic cookware, casserole cookware, glass cookware, etc., it cannot be heated at all, resulting in poor versatility of the induction heating appliance.

[0014] In response to the above problems, when the technical solution of this application receives a cooking instruction, it first determines the type of the cookware to be heated currently according to the cooking instruction input by the user. Exemplarily, the cookware type can be divided into metal cookware with high magnetic permeability and non-metal cookware without high magnetic permeability.

[0015] When the cookware type is the first type, it means that the current cookware has a relatively high magnetic permeability. The coil assembly can generate eddy currents on the cookware through resonance with the resonant capacitor. The eddy currents act on the resistance of the cookware itself, causing the cookware to generate heat itself and realizing the heating of the cookware.

[0016] When the cookware type is the second type, it means that the current cookware does not have high magnetic permeability. Therefore, eddy currents cannot be generated on the cookware through the resonance between the coil assembly and the resonant capacitor. For this situation, by increasing the switching frequency of the switching device, the coil assembly and the resonant capacitor resonate at a higher resonant frequency, so that the coil itself generates heat, and the cookware is heated by the heat generated by the coil.

[0017] Specifically, since the coil itself has a certain impedance, when a high-frequency resonant current passes through the coil, heat will be generated due to the action of its own impedance. When the coil assembly resonates with the resonant capacitor at a higher resonant frequency, the impedance value of the coil itself will increase significantly. After the impedance of the coil increases, the heat generated when the current passes through the coil will also increase accordingly. Therefore, sufficient heat can be generated in the coil itself, and this heat is transferred to the cookware of the cooking appliance, thereby realizing heating the cookware by the coil generating heat.

[0018] The technical solution of the present application can select different heating methods according to the type of cookware. When the cookware type is a metal cookware or other cookware with a relatively high magnetic permeability, the cookware is heated by the traditional inductive heating method to form eddy currents in the cookware. When the cookware type is a non-metal cookware or other cookware without a relatively high magnetic permeability, the impedance of the coil itself is increased by a higher oscillation frequency, and the coil is heated by increasing the impedance of the coil itself. The heat generated by the coil heating is used to heat the cookware. Thus, without changing the hardware structure of the original inductive heating cooking appliance, the inductive heating cooking appliance can heat non-metal cookware, improving the versatility of the inductive heating cooking appliance.

[0019] In addition, the heating control method of the cooking device in the above technical solution provided by the present application may also have the following additional technical features:

[0020] In some technical solutions of the present application, optionally, the step of controlling the switching device to switch at a second switching frequency according to the target heating power specifically includes:

[0021] Collect the voltage amplitude of the input voltage; when the voltage amplitude of the input voltage is less than or equal to the first voltage threshold, control the switching device to switch at the second switching frequency; when the voltage amplitude of the input voltage is greater than the first voltage threshold, control the switching device to turn off.

[0022] In the technical solution of the present application, by collecting the voltage amplitude of the input voltage, the switching device is controlled to perform high-frequency switching within a suitable voltage range, and the switching device is controlled to be turned on for a long time after the voltage amplitude increases, so as to ensure that the switching device and the coil assembly will not be damaged and limit the heating power of the coil.

[0023] Specifically, since the impedance of the coil itself is generally low, based on the electric heating power formula P = U 2 ÷R, it can be seen that the heating power P of the coil assembly is associated with the input voltage U and its own impedance R. The input voltage is generally the mains power, and the waveform of the mains power is a sine wave. Generally, the maximum value of the voltage amplitude of the mains voltage is 220V. Therefore, within one cycle of the input voltage, the voltage amplitude first rises and then falls.

[0024] The first voltage threshold is the voltage that ensures the safe operation of the switching device and the coil assembly while guaranteeing the heating power. The higher the first voltage threshold, the greater the heating power of the coil assembly, and vice versa.

[0025] Within one cycle of the input voltage, the voltage amplitude of the input voltage gradually increases first. Before the voltage amplitude of the input voltage reaches the first voltage threshold, the switching device switches rapidly at the second switching frequency. At this time, the coil assembly and the resonant capacitor oscillate rapidly, and the impedance of the coil assembly increases and generates heat to heat the cookware.

[0026] When the voltage amplitude of the input voltage reaches the first voltage threshold, if the switching device continues to conduct at this time, it will cause the heating power of the coil assembly to be too large, and there is a risk of damaging the heating coil and the switching device. Therefore, the switching device is controlled to turn off at this time. After the voltage amplitude of the input voltage is less than the first voltage threshold again, the switching device switches at the second switching frequency again.

[0027] The technical solution of this application controls the switching state of the switching device based on the voltage amplitude of the input voltage, thereby limiting the maximum heating power of the coil assembly, ensuring the safe operation of the safety device and the coil assembly, and ensuring the stability of the cooking device while improving the versatility of the cooking device.

[0028] In some technical solutions of this application, optionally, the heating control method further includes: obtaining the operating condition data of the switching device; in the case where the cookware type is the second type, adjusting the switching frequency of the switching device, the duty cycle of the switching device, and / or the first voltage threshold according to the comparison result between the operating condition data and the operating condition threshold.

[0029] In this technical solution, the operating condition data of the switching device indicates whether there is a risk of damage to the switching device, and the operating condition threshold is the threshold that can ensure the stable operation of the switching device. After controlling the switching device to switch and operate at the corresponding switching frequency according to the cookware type and the target heating power, the cooking device continuously collects the operating condition data of the switching device and compares the collected operating condition data with the operating condition threshold.

[0030] Optionally, the above operating condition threshold is associated with the electrical parameters of the switching device and the target heating power.

[0031] When the cookware type is the second type, the cookware is heated by making the coil assembly generate heat, that is, by high-frequency switching to increase the impedance of the coil and make the coil generate heat. At this time, when the operating condition data of the switching device exceeds the operating condition threshold, it means that the switching device is in an unfavorable operating condition and there is a risk of damage. At this time, the operating state of the switching device is adjusted to reduce the operating pressure of the switching device.

[0032] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the switching frequency of the switching device is adjusted, specifically, the switching frequency of the switching device is increased, so as to reduce the power and the pressure on the switching device.

[0033] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the duty cycle of the switching device is adjusted, specifically, the duty cycle of the switching device is decreased, so as to reduce the power and the pressure on the switching device.

[0034] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the first voltage threshold is adjusted, specifically, the first voltage threshold is decreased. After the first voltage threshold is decreased, the off-time of the switching device becomes longer, so as to reduce the power and the pressure on the switching device.

[0035] The technical solution of the present application dynamically adjusts the operating parameters of the switching device according to the operating condition data of the switching device, so that the switching device can maintain a relatively balanced operating condition and improve the stability of the switching device.

[0036] In some technical solutions of the present application, optionally, the thermal control method further includes: obtaining the operating condition data of the switching device; when the type of the cookware is the first type, adjusting the switching frequency of the switching device and / or the duty cycle of the switching device according to the comparison result between the operating condition data and the operating condition threshold.

[0037] In this technical solution, when the type of the cookware is the first type, induction heating is adopted, that is, resonance is carried out between the coil assembly and the resonance capacitor to generate eddy current in the cookware to heat the cookware. At this time, when the operating condition data of the switching device exceeds the operating condition threshold, it indicates that the switching device is in an adverse operating condition and there is a risk of damage. At this time, the operating state of the switching device is adjusted to reduce the operating pressure of the switching device.

[0038] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the switching frequency of the switching device is adjusted, specifically, the switching frequency of the switching device is increased, so as to reduce the power and the pressure on the switching device.

[0039] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the duty cycle of the switching device is adjusted, specifically, the duty cycle of the switching device is decreased, so as to reduce the power and the pressure on the switching device.

[0040] The technical solution of the present application dynamically adjusts the operating parameters of the switching device according to the operating condition data of the switching device, so that the switching device can maintain a relatively balanced operating condition and improve the stability of the switching device.

[0041] In some technical solutions of the present application, optionally, the operating condition data includes: voltage value, current value and temperature value; the operating condition threshold includes: second voltage threshold, current threshold and temperature threshold.

[0042] In this technical solution, the operating condition data includes a voltage value, specifically the voltage value at the high-voltage end of the switching device. Correspondingly, the operating condition threshold includes a second voltage threshold, which is the maximum voltage value that the high-voltage end of the switching device can withstand. When the voltage value at the high-voltage end of the switching device is greater than the second voltage threshold, it indicates that the switching device has a risk of damage. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0043] The operating condition data further includes a current value, specifically the current value at the high-voltage end of the switching device. Correspondingly, the operating condition threshold includes a current threshold, which is the maximum current value that the switching device can withstand. When the current value at the high-voltage end of the switching device is greater than the current threshold, it indicates that the switching device has a risk of damage. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0044] The operating condition data further includes a temperature value, and the operating condition threshold includes a temperature threshold, which is the maximum temperature value that the switching device can withstand. When the temperature value of the switching device is greater than the temperature threshold, there is a risk of the switching device burning out. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0045] The technical solution of this application collects the voltage value and current value at the high-voltage end of the switching device, as well as the temperature value of the switching device, and dynamically adjusts the operating parameters of the switching device by determining whether the corresponding operating condition parameters exceed the corresponding thresholds, which can ensure the reliability of the switching device.

[0046] In some technical solutions of this application, optionally, the heating control method further includes: obtaining the heating power of the coil assembly; in the case where the cookware type is the second type, adjusting the switching frequency of the switching device, the duty cycle of the switching device, and / or the first voltage threshold according to the comparison result between the heating power and the target heating power.

[0047] In this technical solution, after controlling the switching device to switch and operate at the corresponding switching frequency according to the cookware type and the target heating power, the cooking device continuously collects the actual heating power of the coil assembly and determines whether the actual heating power meets the target heating power set by the user.

[0048] Specifically, when the cookware type is identified as the second type, the coil assembly is heated by making it generate heat, that is, the coil impedance is increased by high-frequency switching to make the coil generate heat. At this time, the factors affecting the heating power include the switching frequency of the switching device, the duty cycle of the switching device, and the turn-off duration of the switching device, where the turn-off duration of the switching device is associated with the first voltage threshold.

[0049] Therefore, when the actual heating power of the coil assembly is less than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the turn-off duration of the switching device can be reduced, that is, the first voltage threshold can be increased, or multiple operations among the above operations can be performed simultaneously, so as to increase the heating power of the coil assembly.

[0050] It can be understood that when the actual heating power of the coil assembly is greater than the target heating power, the switching frequency of the switching device can be correspondingly increased, or the duty cycle of the switching device can be reduced, or the turn-off duration of the switching device can be increased, that is, the first voltage threshold can be reduced, or multiple operations among the above operations can be performed simultaneously, so as to reduce the heating power of the coil assembly.

[0051] The technical solution of this application collects the actual heating power of the coil assembly, and dynamically adjusts the working parameters of the switching device based on the comparison result between the actual heating power and the target heating power set by the user, so that the actual heating power can be maintained within a range matching the target heating power set by the user, ensuring the heating effect of the cooking device.

[0052] In some technical solutions of this application, optionally, the heating control method further includes: obtaining the heating power of the coil assembly; when the type of the cookware is the first type, adjusting the switching frequency of the switching device and / or the duty cycle of the switching device according to the comparison result between the heating power and the target heating power.

[0053] In this technical solution, when the type of the cookware is identified as the first type, inductive heating is adopted, that is, the coil assembly resonates with the resonant capacitor to generate eddy current in the cookware to heat the cookware. At this time, the factors affecting the heating power include the switching frequency of the switching device and the duty cycle of the switching device.

[0054] Therefore, when the actual heating power of the coil assembly is less than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the operations of reducing the switching frequency and increasing the duty cycle can be performed simultaneously, so as to increase the heating power of the coil assembly.

[0055] It can be understood that when the actual heating power of the coil assembly is greater than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the operations of increasing the switching frequency and reducing the duty cycle can be performed simultaneously, so as to reduce the heating power of the coil assembly.

[0056] The technical solution of this application collects the actual heating power of the coil assembly, and based on the comparison result between the actual heating power and the target heating power set by the user, dynamically adjusts the operating parameters of the switching device, so that the actual heating power can be maintained within the range matching the target heating power set by the user, ensuring the heating effect of the cooking device.

[0057] In some technical solutions of this application, optionally, the first type of cookware is metal cookware, and the second type of cookware is non-metal cookware.

[0058] In this technical solution, the first type of cookware is metal cookware, and the metal cookware has a good magnetic permeability. Therefore, by generating resonance between the coil assembly and the resonant capacitor, eddy currents can be induced in the metal cookware, and the energy of the eddy currents can heat the metal cookware, thereby realizing the induction heating of the cookware.

[0059] The second type of cookware is non-metal cookware, and the non-metal cookware has a poor magnetic permeability. Therefore, it is impossible to cook through traditional induction heating. For this, the technical solution of this application increases the impedance value of the coil assembly by increasing the switching frequency of the switching device, so that the coil assembly itself generates heat, and heats the cookware by the heat generated by the coil assembly.

[0060] The technical solution of this application can realize the heating of non-metal cookware without changing the hardware structure of the original induction heating appliance, improving the versatility of the induction heating cooking device.

[0061] The second aspect of this application provides a heating control device for a cooking device. The cooking device includes a switching device and a coil assembly for heating the cookware. The heating control device includes: an acquisition module for acquiring the type of the cookware in response to a cooking instruction, where the cooking instruction indicates the target heating power;

[0062] A control module for: when the cookware type is the first type, controlling the switching device to switch at a first switching frequency according to the target heating power, so that eddy currents are formed in the cookware by the coil assembly; or when the cookware type is the second type, controlling the switching device to switch at a second switching frequency according to the target heating power, so that the coil assembly generates heat and heats the cookware; where the magnetic permeability of the first type of cookware is higher than that of the second type of cookware, and the first switching frequency is lower than the second switching frequency.

[0063] In this technical solution, the cooking device can be an induction heating electromagnetic cooker, a multi-head stove, a rice cooker, an electric pressure cooker and other cooking devices. The cooking device includes a switching device and a coil assembly. Exemplarily, the switching device is a high-frequency power inverter switching device, such as an IGBT switching device or a MOS switching device.

[0064] The switching device is electrically connected to the coil assembly. Exemplarily, the switching device can be electrically connected to the coil assembly through a reactive power compensation resonance circuit. A resonance capacitor is provided in the reactive power compensation resonance circuit. Through the high-frequency switching action of the switching device, oscillations are generated between the coil assembly and the resonance capacitor, and eddy currents can be generated in a metal cookware with high magnetic permeability, thereby realizing the heating of the cookware.

[0065] In the related art, the above-mentioned induction heating appliance is only applicable to metal cookware with high magnetic permeability. For cookware with relatively low magnetic permeability, such as some non-metal cookware, including ceramic cookware, casserole cookware, glass cookware, etc., it cannot be heated at all, resulting in poor versatility of the induction heating appliance.

[0066] In view of the above problems, when the technical solution of the present application receives a cooking instruction, first, according to the cooking instruction input by the user, the cookware type of the current cookware to be heated is determined. Exemplarily, the cookware type can be divided into metal cookware with high magnetic permeability and non-metal cookware without high magnetic permeability.

[0067] When the cookware type is the first type, it indicates that the current cookware has a relatively high magnetic permeability. The coil assembly can generate eddy currents on the cookware through resonance with the resonance capacitor. The eddy currents act on the resistance of the cookware itself, causing the cookware itself to generate heat and realizing the heating of the cookware.

[0068] When the cookware type is the second type, it means that the current cookware does not have high magnetic permeability, so eddy currents cannot be generated on the cookware through the resonance between the coil assembly and the resonance capacitor. For this situation, by increasing the switching frequency of the switching device, the coil assembly and the resonance capacitor resonate at a higher resonance frequency, so that the coil itself generates heat, and the cookware is heated by the heat generated by the coil.

[0069] Specifically, since the coil itself has a certain impedance, when a high-frequency resonance current passes through the coil, the coil itself will generate heat due to the action of its own impedance. When the coil assembly and the resonance capacitor resonate at a higher resonance frequency, the impedance value of the coil itself will increase significantly. When the impedance of the coil increases, the heat generated when the current passes through the coil will also increase accordingly. Therefore, the coil itself can generate sufficient heat, and these heats are transferred to the cookware of the cooking appliance, thereby realizing the heating of the cookware by the heat generated by the coil.

[0070] The technical solution of this application can select different heating methods according to the type of cookware. When the cookware type is a metal cookware or other cookware with a relatively high magnetic permeability, it heats the cookware by the traditional inductive heating method, forming eddy current in the cookware to generate heat. When the cookware type is a non-metal cookware or other cookware with a relatively low magnetic permeability, the impedance of the coil itself is increased by a higher oscillation frequency, and the coil is heated by increasing the impedance of the coil itself, and the heat generated by the coil heating is used to heat the cookware. Thus, without changing the original hardware structure of the inductive heating cooking appliance, the inductive heating cooking appliance can heat the non-metal cookware, improving the versatility of the inductive heating cooking appliance.

[0071] The third aspect of this application provides a heating control device for a cooking device, including: a memory for storing programs or instructions; a processor for implementing the steps of the heating control method of the cooking device provided in any of the above technical solutions when executing the programs or instructions, and thus also including all its beneficial effects. To avoid repetition, it will not be elaborated here.

[0072] The fourth aspect of this application provides a readable storage medium with programs or instructions stored thereon. When the programs or instructions are executed by a processor, the steps of the heating control method of the cooking device provided in any of the above technical solutions are implemented, and thus also including all its beneficial effects. To avoid repetition, it will not be elaborated here.

[0073] The fifth aspect of this application provides a cooking device, including the heating control device of the cooking device provided in any of the above technical solutions; and / or the readable storage medium provided in any of the above technical solutions, and thus also including all its beneficial effects. To avoid repetition, it will not be elaborated here.

[0074] In some technical solutions of this application, optionally, the cooking device further includes: a drive circuit electrically connected to the heating control device and / or the readable storage medium; a switching device electrically connected to the drive circuit, and the drive circuit is used to drive the switching device to switch; a resonant circuit including a resonant capacitor, and the resonant circuit is electrically connected to the switching device; a coil assembly electrically connected to the resonant circuit.

[0075] In this technical solution, the cooking device includes a drive circuit, a switching device, a resonant circuit and a coil assembly. Among them, the drive circuit is electrically connected to the heating control device and is used to generate a drive signal for the switching device, and drives the switching device to change its switching state through the drive signal. The switching device is electrically connected to the resonant circuit. When the switching device switches at a certain switching frequency, the resonant capacitor and the coil assembly generate resonance, thereby generating eddy current in the cookware.

[0076] When using a non - metallic cookware, the switching frequency of the switching device is increased, so that the impedance of the coil assembly increases, causing the coil assembly to heat itself, and heating the cookware through the heat generated by the coil assembly.

[0077] The technical solution of this application can realize the heating of non - metallic cookware without changing the original hardware structure of the induction heating cooking device, improving the versatility of the induction heating cooking device. Brief Description of the Drawings

[0078] The above - mentioned and / or additional aspects and advantages of this application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0079] Figure 1 The flowchart of the heating control method of the cooking device showing some embodiments of this application;

[0080] Figure 2 The circuit topology diagram of the cooking device showing some embodiments of this application;

[0081] Figure 3 The waveform comparison schematic diagram of the input voltage and the electrical signals related to the switching device when heating a metallic cookware showing some embodiments of this application;

[0082] Figure 4 The waveform comparison schematic diagram of the input voltage and the electrical signals related to the switching device when heating a non - metallic cookware showing some embodiments of this application;

[0083] Figure 5 The flowchart of the heating control method showing some embodiments of this application;

[0084] Figure 6 The structural block diagram of the heating control device showing some embodiments of this application;

[0085] Figure 7 The structural block diagram of the heating control device showing some embodiments of this application.

[0086] Reference Signs:

[0087] 200 Cooking device, 202 Low - voltage power supply, 204 Main control circuit, 206 Sampling feedback circuit, 208 Power inverter drive circuit, 210 Switching device, 212 Rectifier and filter circuit, 214 Reactive power compensation resonance circuit, 216 Coil assembly. Detailed Embodiments

[0088] In order to more clearly understand the above - mentioned objects, features, and advantages of this application, the following further detailed description of this application is provided in conjunction with the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other.

[0089] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0090] Reference will be made below to Figures 1 to 7 describe a heating control method, apparatus, storage medium, and cooking device of a cooking device according to some embodiments of the present application.

[0091] In some embodiments of the present application, a heating control method of a cooking device is provided. The cooking device includes a switching device and a coil assembly. The switching device is electrically connected to the coil assembly, and the coil assembly is used to heat a cookware. Figure 1 A flowchart of a heating control method of a cooking device according to some embodiments of the present application is shown. As Figure 1 shown, the method includes:

[0092] Step 102, in response to a cooking instruction, obtain the type of the cookware. The cooking instruction indicates a target heating power.

[0093] Step 104, when the type of the cookware is the first type, control the switching device to switch at a first switching frequency according to the target heating power, so that an eddy current is formed in the cookware by the coil assembly.

[0094] Step 106, when the type of the cookware is the second type, control the switching device to switch at a second switching frequency according to the target heating power, so that the coil assembly generates heat and heats the cookware.

[0095] Wherein, the magnetic permeability of the cookware of the first type is higher than that of the cookware of the second type, and the first switching frequency is lower than the second switching frequency.

[0096] In this embodiment, the cooking device may be an induction heating electromagnetic cooker, a multi-head stove, a rice cooker, an electric pressure cooker, or other cooking devices. The cooking device includes a switching device and a coil assembly. Exemplarily, the switching device is a high-frequency power inverter switching device, such as an IGBT (Insulated Gate Bipolar Transistor) switching device or a MOS (Metal Oxide Semiconductor) switching device.

[0097] The switching device is electrically connected to the coil assembly. Exemplarily, the switching device can be electrically connected to the coil assembly through a reactive power compensation resonance circuit. A resonance capacitor is provided in the reactive power compensation resonance circuit. Through the high-frequency switching action of the switching device, oscillations are generated between the coil assembly and the resonance capacitor, enabling eddy currents to be generated in a metal cookware with high magnetic permeability, thereby achieving heating of the cookware.

[0098] In related technologies, the above-mentioned induction heating appliance is only applicable to metal cookware with high magnetic permeability. For cookware with relatively low magnetic permeability, such as some non-metal cookware, including ceramic cookware, casserole cookware, glass cookware, etc., it cannot be heated at all, resulting in poor versatility of the induction heating appliance.

[0099] In response to the above problems, when receiving a cooking instruction, the embodiment of the present application first determines the type of the cookware to be heated currently according to the cooking instruction input by the user. Exemplarily, the cookware type can be divided into metal cookware with high magnetic permeability and non-metal cookware without high magnetic permeability.

[0100] Figure 2 The circuit topology diagram of the cooking device according to some embodiments of the present application is shown, as Figure 2 shown, the cooking device 200 includes a low-voltage power supply 202, a main control circuit 204, a sampling feedback circuit 206, a power inverter drive circuit 208, a switching device 210, a rectifier filter circuit 212, a reactive power compensation resonance circuit 214, and a coil assembly 216.

[0101] The low-voltage power supply 202 receives an externally input electrical signal and converts it into a low-voltage electrical signal capable of powering the main control circuit. The main control circuit 204 can generate a corresponding drive signal according to the target heating power and the cookware type set by the user, and drive the switching device 210 to perform a switching action through the drive signal. The sampling feedback circuit can collect parameters such as the voltage and current of the switching device 210 and the reactive power compensation resonance circuit 214, and feedback them to the main control circuit 204 to achieve closed-loop control. The rectifier filter circuit 212 can perform filtering and rectification operations on the input current and transfer it to the reactive power compensation resonance circuit 214 through the switching device. The reactive power compensation resonance circuit 214 includes a resonance capacitor, and the resonance capacitor and the coil assembly 216 form a resonance circuit.

[0102] Figure 3 The waveform comparison schematic diagram of the input voltage and the electrical signal related to the switching device when heating a metal cookware according to some embodiments of the present application is shown, as Figure 3 shown, when the cookware type is the first type, it indicates that the current cookware has a relatively high magnetic permeability. The coil assembly can generate eddy currents on the cookware through resonance with the resonance capacitor. The eddy currents act on the resistance of the cookware itself, causing the cookware to generate heat itself and achieving heating of the cookware.

[0103] When the type of the cookware is the second type, it means that the current cookware does not have a high magnetic permeability, so eddy current cannot be generated on the cookware through the resonance between the coil assembly and the resonant capacitor. For this situation, by increasing the switching frequency of the switching device, the coil assembly and the resonant capacitor resonate at a higher resonant frequency, so that the coil itself generates heat, and the cookware is heated by the heat generated by the coil.

[0104] Specifically, since the coil itself has a certain impedance, when a high-frequency resonant current passes through the coil, heat will be generated due to the action of its own impedance. When the coil assembly and the resonant capacitor resonate at a higher resonant frequency, the impedance value of the coil itself will increase significantly. After the impedance of the coil increases, the heat generated when the current passes through the coil will also increase accordingly. Therefore, enough heat can be generated by the coil itself, and these heats are transferred to the cookware of the cooking appliance, so as to realize heating the cookware by the heat generated by the coil.

[0105] The embodiment of the present application can select different heating methods according to the type of the cookware. When the type of the cookware is a metal cookware or other cookware with a relatively high magnetic permeability, the cookware is heated by the traditional induction heating method to form eddy current in the cookware. When the type of the cookware is a non-metal cookware or other cookware without a relatively high magnetic permeability, the impedance of the coil itself is increased by a higher oscillation frequency, and the coil is heated by increasing the impedance of the coil itself, and the cookware is heated by the heat generated by the coil. Thus, without changing the hardware structure of the original induction heating cooking appliance, the induction heating cooking appliance can heat the non-metal cookware, and the versatility of the induction heating cooking appliance is improved.

[0106] In some embodiments of the present application, optionally, the step of controlling the switching device to switch at the second switching frequency according to the target heating power specifically includes:

[0107] Collect the voltage amplitude of the input voltage; when the voltage amplitude of the input voltage is less than or equal to the first voltage threshold, control the switching device to switch at the second switching frequency; when the voltage amplitude of the input voltage is greater than the first voltage threshold, control the switching device to turn off.

[0108] In the embodiment of the present application, by collecting the voltage amplitude of the input voltage, the switching device is controlled to perform high-frequency switching within a suitable voltage range, and the switching device is controlled to be turned on for a long time after the voltage amplitude increases, so as to ensure that the switching device and the coil assembly will not be damaged and limit the heating power of the coil.

[0109] Figure 4 The waveform comparison schematic diagram of the input voltage and the relevant electrical signals of the switching device when heating the non-metal cookware in some embodiments of the present application is shown, as Figure 4As shown, specifically, since the impedance of the coil itself is generally low, based on the electrothermal power formula P = U 2 ÷R, it can be seen that the heating power P of the coil assembly is associated with the input voltage U and its own impedance R. The input voltage is generally the mains power, and the waveform of the mains power is a sine wave. Generally, the maximum value of the voltage amplitude of the mains voltage is 220V. Therefore, within one cycle of the input voltage, the voltage amplitude first rises and then falls.

[0110] The first voltage threshold is the voltage that ensures the safe operation of the switching device and the coil assembly on the premise of ensuring the heating power. The higher the first voltage threshold, the greater the heating power of the coil assembly, and vice versa, the lower the heating power of the coil assembly.

[0111] Within one cycle of the input voltage, the voltage amplitude of the input voltage gradually increases first. Before the voltage amplitude of the input voltage reaches the first voltage threshold, the switching device switches rapidly at the second switching frequency. At this time, the coil assembly and the resonant capacitor oscillate rapidly, and the impedance of the coil assembly increases and generates heat to heat the cookware.

[0112] When the voltage amplitude of the input voltage reaches the first voltage threshold, if the switching device continues to conduct at this time, it will cause the heating power of the coil assembly to be too large, and there is a risk of damaging the heating coil and the switching device. Therefore, the switching device is controlled to turn off at this time. After the voltage amplitude of the input voltage is less than the first voltage threshold again, the switching device switches at the second switching frequency again.

[0113] In the embodiment of the present application, by controlling the switching state of the switching device based on the voltage amplitude of the input voltage, the maximum heating power of the coil assembly is limited, ensuring the safe operation of the safety device and the coil assembly, and ensuring the stability of the cooking device while improving the versatility of the cooking device.

[0114] In some embodiments of the present application, optionally, the heating control method further includes: obtaining the working condition data of the switching device; in the case where the cookware type is the second type, adjusting the switching frequency of the switching device, the duty cycle of the switching device, and / or the first voltage threshold according to the comparison result between the working condition data and the working condition threshold.

[0115] In this embodiment, the working condition data of the switching device indicates whether there is a risk of damage to the switching device, and the working condition threshold is the threshold that can ensure the stable operation of the switching device. After controlling the switching device to switch and work at the corresponding switching frequency according to the cookware type and the target heating power, the cooking device continuously collects the working condition data of the switching device and compares the collected working condition data with the working condition threshold.

[0116] Optionally, the above-mentioned working condition threshold is associated with the electrical parameters of the switching device and the target heating power.

[0117] When the type of cookware is the second type, the cookware is heated by making the coil assembly generate heat, that is, the coil impedance is increased by a high-frequency switch to make the coil generate heat. At this time, when the operating condition data of the switching device exceeds the operating condition threshold, it indicates that the switching device is in an adverse operating condition and there is a risk of damage. At this time, the operating state of the switching device is adjusted to reduce the operating pressure of the switching device.

[0118] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the switching frequency of the switching device is adjusted, specifically, the switching frequency of the switching device is increased, so as to reduce the power and the pressure of the switching device.

[0119] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the duty cycle of the switching device is adjusted, specifically, the duty cycle of the switching device is reduced, so as to reduce the power and the pressure of the switching device.

[0120] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the first voltage threshold is adjusted, specifically, the first voltage threshold is reduced. After the first voltage threshold is reduced, the turn-off duration of the switching device becomes longer, so as to reduce the power and the pressure of the switching device.

[0121] In the embodiments of the present application, by dynamically adjusting the operating parameters of the switching device according to the operating condition data of the switching device, the switching device can be maintained in a relatively balanced operating condition, and the stability of the switching device is improved.

[0122] In some embodiments of the present application, optionally, the thermal control method further includes: obtaining the operating condition data of the switching device; in the case where the type of cookware is the first type, adjusting the switching frequency of the switching device and / or the duty cycle of the switching device according to the comparison result between the operating condition data and the operating condition threshold.

[0123] In this embodiment, when the type of cookware is the first type, inductive heating is adopted, that is, the coil assembly resonates with the resonant capacitor to generate eddy current in the cookware to heat the cookware. At this time, when the operating condition data of the switching device exceeds the operating condition threshold, it indicates that the switching device is in an adverse operating condition and there is a risk of damage. At this time, the operating state of the switching device is adjusted to reduce the operating pressure of the switching device.

[0124] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the switching frequency of the switching device is adjusted, specifically, the switching frequency of the switching device is increased, so as to reduce the power and the pressure of the switching device.

[0125] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the duty cycle of the switching device is adjusted, specifically, the duty cycle of the switching device is reduced, so as to reduce the power and the pressure of the switching device.

[0126] In the embodiments of the present application, by dynamically adjusting the operating parameters of the switching device according to the operating condition data of the switching device, the switching device can be maintained under a relatively balanced operating condition, thereby improving the stability of the switching device.

[0127] In some embodiments of the present application, optionally, the operating condition data includes: voltage value, current value, and temperature value; the operating condition thresholds include: second voltage threshold, current threshold, and temperature threshold.

[0128] In this embodiment, the operating condition data includes a voltage value, which is specifically the voltage value at the high-voltage end of the switching device. Correspondingly, the operating condition threshold includes a second voltage threshold, which is the maximum voltage value that the high-voltage end of the switching device can withstand. When the voltage value at the high-voltage end of the switching device is greater than the second voltage threshold, it indicates that the switching device has a risk of damage. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0129] The operating condition data further includes a current value, which is specifically the current value at the high-voltage end of the switching device. Correspondingly, the operating condition threshold includes a current threshold, which is the maximum current value that the switching device can withstand. When the current value at the high-voltage end of the switching device is greater than the current threshold, it indicates that the switching device has a risk of damage. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0130] The operating condition data further includes a temperature value, and the operating condition threshold includes a temperature threshold, which is the maximum temperature value that the switching device can withstand. When the temperature value of the switching device is greater than the temperature threshold, the switching device has a risk of burning out. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0131] In the embodiments of the present application, by collecting the voltage value and current value at the high-voltage end of the switching device, as well as the temperature value of the switching device, and by determining whether the corresponding operating condition parameters exceed the corresponding thresholds, the operating parameters of the switching device are dynamically adjusted, which can ensure the reliability of the switching device.

[0132] In some embodiments of the present application, optionally, the heating control method further includes: obtaining the heating power of the coil assembly; in the case where the cookware type is the second type, adjusting the switching frequency of the switching device, the duty cycle of the switching device, and / or the first voltage threshold according to the comparison result between the heating power and the target heating power.

[0133] In this embodiment, after controlling the switching device to switch on and off at the corresponding switching frequency according to the cookware type and the target heating power, the cooking device continuously collects the actual heating power of the coil assembly and determines whether the actual heating power meets the target heating power set by the user.

[0134] Specifically, when the cookware type is identified as the second type, the coil assembly is heated to heat the cookware, that is, the coil impedance is increased by a high-frequency switch to make the coil heat up. At this time, the factors affecting the heating power include the switching frequency of the switching device, the duty cycle of the switching device, and the turn-off duration of the switching device, where the turn-off duration of the switching device is associated with the first voltage threshold.

[0135] Therefore, when the actual heating power of the coil assembly is less than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the turn-off duration of the switching device can be reduced, that is, the first voltage threshold can be increased, or multiple operations among the above operations can be performed simultaneously, so as to increase the heating power of the coil assembly.

[0136] It can be understood that when the actual heating power of the coil assembly is greater than the target heating power, the switching frequency of the switching device can be correspondingly increased, or the duty cycle of the switching device can be reduced, or the turn-off duration of the switching device can be increased, that is, the first voltage threshold can be reduced, or multiple operations among the above operations can be performed simultaneously, so as to reduce the heating power of the coil assembly.

[0137] In the embodiment of the present application, by collecting the actual heating power of the coil assembly and based on the comparison result between the actual heating power and the target heating power set by the user, the working parameters of the switching device are dynamically adjusted, so that the actual heating power can be maintained within a range matching the target heating power set by the user, ensuring the heating effect of the cooking device.

[0138] In some embodiments of the present application, optionally, the heating control method further includes: obtaining the heating power of the coil assembly; in the case where the cookware type is the first type, adjusting the switching frequency of the switching device and / or the duty cycle of the switching device according to the comparison result between the heating power and the target heating power.

[0139] In this embodiment, when the cookware type is identified as the first type, inductive heating is adopted, that is, the coil assembly resonates with the resonant capacitor to generate eddy current in the cookware to heat the cookware. At this time, the factors affecting the heating power include the switching frequency of the switching device and the duty cycle of the switching device.

[0140] Therefore, when the actual heating power of the coil assembly is less than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the operations of reducing the switching frequency and increasing the duty cycle can be performed simultaneously, so as to increase the heating power of the coil assembly.

[0141] It can be understood that when the actual heating power of the coil assembly is greater than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the operations of increasing the switching frequency and reducing the duty cycle can be performed simultaneously, so as to reduce the heating power of the coil assembly.

[0142] In the embodiment of the present application, by collecting the actual heating power of the coil assembly and based on the comparison result between the actual heating power and the target heating power set by the user, the working parameters of the switching device are dynamically adjusted, so that the actual heating power can be maintained within a range matching the target heating power set by the user, ensuring the heating effect of the cooking device.

[0143] In some embodiments of the present application, optionally, the first type of cookware is metal cookware, and the second type of cookware is non-metal cookware.

[0144] In this embodiment, the first type of cookware is metal cookware, and the metal cookware has a good magnetic permeability. Therefore, by generating resonance between the coil assembly and the resonant capacitor, eddy currents can be induced in the metal cookware, and the energy of the eddy currents can heat the metal cookware, thereby realizing inductive heating of the cookware.

[0145] The second type of cookware is non-metal cookware, and the non-metal cookware has a poor magnetic permeability. Therefore, it is impossible to cook through traditional inductive heating. In this regard, in the embodiment of the present application, by increasing the switching frequency of the switching device, the impedance value of the coil assembly is increased, so that the coil assembly itself generates heat, and the cookware is heated by the heat generated by the coil assembly.

[0146] The embodiment of the present application can realize the heating of non-metal cookware without changing the hardware structure of the original inductive heating appliance, improving the versatility of the inductive heating cooking device.

[0147] In some embodiments of the present application, Figure 5 The flowchart of the heating control method of some embodiments of the present application is shown, as Figure 5 shown, the method includes:

[0148] Step 502, identify the cookware type; if the cookware type is metal cookware, go to step 504, if the cookware type is non-metal cookware, go to step 516;

[0149] Step 504, set the working parameters according to the target heating power;

[0150] Step 506, determine whether the working condition parameter exceeds the threshold; if yes, go to step 508, otherwise go to step 514;

[0151] Step 508, increase the frequency or reduce the duty cycle; return to step 506;

[0152] Step 510: Determine whether the target power is reached. If yes, proceed to step 504; otherwise, proceed to step 512.

[0153] Step 512: Decrease the frequency or increase the duty cycle.

[0154] Step 514: The cookware heats up.

[0155] Step 516: Set the working parameters according to the target heating power.

[0156] Step 518: Determine whether the operating condition parameters exceed the threshold. If yes, proceed to step 520; otherwise, proceed to step 522.

[0157] Step 520: Increase the frequency, decrease the duty cycle, or extend the off-time; return to step 518.

[0158] Step 522: Determine whether the target power is reached. If yes, proceed to step 526; otherwise, proceed to step 524.

[0159] Step 524: Decrease the frequency, increase the duty cycle, or shorten the off-time.

[0160] Step 526: The coil heats up.

[0161] In the embodiment of the present application, a power control circuit topology of high-frequency inverter resonance is adopted, and different control methods are used for different cookwares. On the premise of ensuring the stability of high-frequency power inverter switching devices, both metal cookwares and non-metal cookwares can be heated. Moreover, when heating a non-metal cookware, since the heating of the cookware is mainly achieved by increasing the heat generated by the self-heating of the coil disk, it has better heating uniformity.

[0162] The specific implementation manners are as follows:

[0163] 1. Through the circuit topology of high-frequency inverter resonance, the oscillation of the coil disk and the resonance capacitor is realized.

[0164] 2. When the cookware is made of metal, in order to ensure the heating energy efficiency, the frequency of the high-frequency inverter resonance system is adjusted, and power control is performed by combining the method of wave loss when necessary, and finally eddy currents are generated in the cookware to achieve heating.

[0165] 3. When the cookware is made of non - metallic material, during the process of controlling high - frequency resonance, the high - frequency power inverter switch device is in a long - off state for some time. By detecting the input voltage of the high - frequency inverter system and the input voltage and current of the inverter device, according to the power demand, on the premise of meeting the electrical stress (such as voltage, current, etc.) of the high - frequency power inverter switch device, for each oscillation waveform of the mains voltage input, when reaching the area where the power is half or less than half of the preset power in the low - voltage area, the high - frequency power inverter switch device is turned off, and the high - frequency power inverter switch device is restarted in another low - voltage area of the oscillation waveform to supplement the other half or more than half of the power. Since the coil disk itself has internal resistance, in this way, on the premise of ensuring the reliability of the high - frequency power inverter switch device, the self - heating of the coil disk can be improved, and the heat of the coil disk is conducted to the cookware to achieve the effect of heating the cookware.

[0166] 4. In order to better control the heating power of the non - metallic cookware and thus achieve temperature control, based on the previous step, the resonance frequency or duty cycle of the high - frequency inverter, and the length of the long - off time of the high - frequency power inverter switch device can be adjusted.

[0167] In the embodiments of the present application, when heating a metallic cookware, in order to ensure heating efficiency, eddy currents are generated in the cookware by means of full - time high - frequency resonance combined with wave loss, and the cookware self - heats through the oscillation of the eddy currents, so as to heat the cookware and achieve the cooking effect. When heating a non - metallic cookware, combined with the internal resistance of the coil disk, by detecting the input voltage and the electrical parameters (such as voltage and current) of the high - frequency inverter power device, the frequency of the high - frequency inverter, the long - on and off durations are controlled in real - time, the self - heating energy of the coil disk is improved, and the heat of the coil disk is conducted to the cookware, so as to heat the cookware and achieve the cooking effect.

[0168] In some embodiments of the present application, a heating control device for a cooking device is provided. The cooking device includes a switch device and a coil assembly, and the coil assembly is used to heat the cookware. Figure 6 The structural block diagram of the heating control device according to some embodiments of the present application is shown, as Figure 6 shown, the heating control device 600 includes:

[0169] An acquisition module 602, configured to acquire the cookware type of the cookware in response to a cooking instruction, where the cooking instruction indicates a target heating power;

[0170] A control module 604 is configured to: when the cookware type is the first type, control a switching device to switch at a first switching frequency according to a target heating power, so as to form an eddy current in the cookware by a coil assembly; or when the cookware type is the second type, control the switching device to switch at a second switching frequency according to the target heating power, so as to heat the coil assembly and heat the cookware; wherein, the magnetic permeability of the cookware of the first type is higher than that of the cookware of the second type, and the first switching frequency is lower than the second switching frequency.

[0171] In this embodiment, the cooking device may be an induction heating electromagnetic cooker, a multi-head stove, a rice cooker, an electric pressure cooker, or other cooking devices. The cooking device includes a switching device and a coil assembly. Exemplarily, the switching device is a high-frequency power inverter switching device, such as an IGBT switching device or a MOS switching device.

[0172] The switching device is electrically connected to the coil assembly. Exemplarily, the switching device may be electrically connected to the coil assembly through a reactive power compensation resonance circuit. A resonance capacitor is provided in the reactive power compensation resonance circuit. Through the high-frequency switching action of the switching device, oscillations are generated between the coil assembly and the resonance capacitor, and eddy currents can be generated in a metal cookware with a high magnetic permeability, thereby realizing the heating of the cookware.

[0173] In the related art, the above-mentioned induction heating appliance is only applicable to metal cookwares with high magnetic permeability, while for cookwares with low magnetic permeability, such as some non-metal cookwares, including ceramic cookwares, casserole cookwares, glass cookwares, etc., they cannot be heated at all, resulting in poor versatility of the induction heating appliance.

[0174] To solve the above problems, when receiving a cooking instruction, the embodiment of the present application first determines the cookware type of the currently to-be-heated cookware according to the cooking instruction input by the user. Exemplarily, the cookware type may be divided into metal cookwares with high magnetic permeability and non-metal cookwares without high magnetic permeability.

[0175] When the cookware type is the first type, it indicates that the current cookware has a relatively high magnetic permeability. The coil assembly can generate eddy currents on the cookware through resonance with the resonance capacitor. The eddy currents act on the resistance of the cookware itself, causing the cookware to generate heat by itself, thereby realizing the heating of the cookware.

[0176] When the cookware type is the second type, it means that the current cookware does not have a high magnetic permeability. Therefore, eddy currents cannot be generated on the cookware through the resonance between the coil assembly and the resonance capacitor. For this situation, by increasing the switching frequency of the switching device, the coil assembly and the resonance capacitor resonate at a higher resonance frequency, so that the coil itself generates heat, and the cookware is heated by the heat of the coil.

[0177] Specifically, since the coil itself has a certain impedance, when a high-frequency resonant current passes through the coil, heat will be generated due to the action of its own impedance. When the coil assembly resonates with the resonant capacitor at a higher resonant frequency, the impedance value of the coil itself will increase significantly. After the impedance of the coil increases, the heat generated when the current passes through the coil will also increase accordingly. Therefore, sufficient heat can be generated by the coil itself, and this heat is transferred to the cookware of the cooking appliance, thereby realizing heating the cookware by the coil generating heat.

[0178] The embodiment of the present application can select different heating methods according to the type of cookware. When the cookware type is a metal cookware or other cookware with a relatively high magnetic permeability, traditional inductive heating is used to generate eddy currents in the cookware to make the cookware heat up. When the cookware type is a non-metal cookware or other cookware without a relatively high magnetic permeability, the impedance of the coil itself is increased by a higher oscillation frequency, and the coil is heated by increasing the impedance of the coil itself. The heat generated by the coil heating is used to heat the cookware, so that the inductive heating cooking appliance can heat the non-metal cookware without changing the original hardware structure of the inductive heating cooking appliance, improving the versatility of the inductive heating cooking appliance.

[0179] In some embodiments of the present application, optionally, the heating control device further includes:

[0180] An acquisition module, configured to acquire the voltage amplitude of the input voltage; the control module is further configured to control the switching device to switch at a second switching frequency when the voltage amplitude of the input voltage is less than or equal to a first voltage threshold; and control the switching device to turn off when the voltage amplitude of the input voltage is greater than the first voltage threshold.

[0181] In the embodiment of the present application, by acquiring the voltage amplitude of the input voltage, the switching device is controlled to perform high-frequency switching within a suitable voltage range, and the switching device is controlled to be turned off after the voltage amplitude increases, so as to ensure that the switching device and the coil assembly will not be damaged and limit the heating power of the coil.

[0182] Specifically, since the impedance of the coil itself is generally low, based on the electric heating power formula P = U 2 ÷R, it can be seen that the heating power P of the coil assembly is associated with the input voltage U and its own impedance R. And the input voltage is generally the mains power, and the waveform of the mains power is a sine wave. Generally, the maximum value of the voltage amplitude of the mains power voltage is 220V. Therefore, within one cycle of the input voltage, the voltage amplitude first rises and then falls.

[0183] The first voltage threshold is the voltage that ensures the working safety of the switching device and the coil assembly on the premise of ensuring the heating power. The higher the first voltage threshold, the greater the heating power of the coil assembly, and vice versa, the lower the heating power of the coil assembly.

[0184] During one cycle of the input voltage, the voltage amplitude of the input voltage first gradually increases. Before the voltage amplitude of the input voltage reaches the first voltage threshold, the switching device switches rapidly at the second switching frequency. At this time, the coil assembly and the resonant capacitor oscillate rapidly, and the impedance of the coil assembly increases and generates heat to heat the cookware.

[0185] When the voltage amplitude of the input voltage reaches the first voltage threshold, if the switching device continues to conduct at this time, it will cause the heating power of the coil assembly to be too large, and there is a risk of damaging the heating coil and the switching device. Therefore, the switching device is controlled to turn off at this time. After the voltage amplitude of the input voltage is less than the first voltage threshold again, the switching device switches at the second switching frequency again.

[0186] In the embodiment of the present application, by controlling the switching state of the switching device based on the voltage amplitude of the input voltage, the maximum heating power of the coil assembly is limited, the working safety of the safety device and the coil assembly is ensured, and the stability of the cooking device is ensured while improving the versatility of the cooking device.

[0187] In some embodiments of the present application, optionally, the acquisition module is further configured to acquire the working condition data of the switching device; the control module is further configured to adjust the switching frequency, the duty cycle of the switching device, and / or the first voltage threshold according to the comparison result between the working condition data and the working condition threshold when the cookware type is the second type.

[0188] In this embodiment, the working condition data of the switching device indicates whether there is a risk of damage to the switching device, and the working condition threshold is the threshold that can ensure the stable operation of the switching device. After controlling the switching device to switch and work at the corresponding switching frequency according to the cookware type and the target heating power, the cooking device continuously acquires the working condition data of the switching device and compares the acquired working condition data with the working condition threshold.

[0189] Optionally, the above-mentioned working condition threshold is associated with the electrical parameters of the switching device and the target heating power.

[0190] When the cookware type is the second type, the cookware is heated by making the coil assembly generate heat, that is, the coil impedance is increased by high-frequency switching to make the coil generate heat. At this time, when the working condition data of the switching device exceeds the working condition threshold, it means that the switching device is in an adverse working condition and there is a risk of damage. At this time, the working state of the switching device is adjusted to reduce the operating pressure of the switching device.

[0191] Exemplarily, when the working condition data of the switching device exceeds the working condition threshold, the switching frequency of the switching device is adjusted, specifically, the switching frequency of the switching device is increased to reduce the power and the pressure on the switching device.

[0192] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the duty cycle of the switching device is adjusted, specifically, the duty cycle of the switching device is reduced, so as to reduce the power and the pressure on the switching device.

[0193] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the first voltage threshold is adjusted, specifically, the first voltage threshold is reduced. After the first voltage threshold is reduced, the turn-off duration of the switching device becomes longer, so as to reduce the power and the pressure on the switching device.

[0194] In the embodiment of the present application, by dynamically adjusting the operating parameters of the switching device according to the operating condition data of the switching device, the switching device can be maintained in a relatively balanced operating condition, thereby improving the stability of the switching device.

[0195] In some embodiments of the present application, optionally, the acquisition module is further configured to acquire the operating condition data of the switching device; the control module is further configured to, when the type of the cookware is the first type, adjust the switching frequency of the switching device and / or the duty cycle of the switching device according to the comparison result between the operating condition data and the operating condition threshold.

[0196] In this embodiment, when the type of the cookware is the first type, inductive heating is adopted, that is, resonance is generated between the coil assembly and the resonance capacitor to generate eddy current in the cookware to heat the cookware. At this time, when the operating condition data of the switching device exceeds the operating condition threshold, it indicates that the switching device is in an adverse operating condition and there is a risk of damage. At this time, the operating state of the switching device is adjusted, thereby reducing the operating pressure of the switching device.

[0197] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the switching frequency of the switching device is adjusted, specifically, the switching frequency of the switching device is increased, so as to reduce the power and the pressure on the switching device.

[0198] Exemplarily, when the operating condition data of the switching device exceeds the operating condition threshold, the duty cycle of the switching device is adjusted, specifically, the duty cycle of the switching device is reduced, so as to reduce the power and the pressure on the switching device.

[0199] In the embodiment of the present application, by dynamically adjusting the operating parameters of the switching device according to the operating condition data of the switching device, the switching device can be maintained in a relatively balanced operating condition, thereby improving the stability of the switching device.

[0200] In some embodiments of the present application, optionally, the operating condition data includes: voltage value, current value, and temperature value; the operating condition threshold includes: second voltage threshold, current threshold, and temperature threshold.

[0201] In this embodiment, the operating condition data includes a voltage value, which is specifically the voltage value at the high-voltage end of the switching device. Correspondingly, the operating condition threshold includes a second voltage threshold, which is the maximum voltage value that the high-voltage end of the switching device can withstand. When the voltage value at the high-voltage end of the switching device is greater than the second voltage threshold, it indicates that there is a risk of damage to the switching device. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0202] The operating condition data further includes a current value, which is specifically the current value at the high-voltage end of the switching device. Correspondingly, the operating condition threshold includes a current threshold, which is the maximum current value that the switching device can withstand. When the current value at the high-voltage end of the switching device is greater than the current threshold, it indicates that there is a risk of damage to the switching device. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0203] The operating condition data further includes a temperature value, and the operating condition threshold includes a temperature threshold, which is the maximum temperature value that the switching device can withstand. When the temperature value of the switching device is greater than the temperature threshold, there is a risk of burning out the switching device. At this time, parameters such as the switching frequency and duty cycle of the switching device are adjusted to reduce power consumption.

[0204] In the embodiment of the present application, by collecting the voltage value and current value at the high-voltage end of the switching device, as well as the temperature value of the switching device, and by judging whether the corresponding operating condition parameters exceed the corresponding thresholds, the operating parameters of the switching device are dynamically adjusted, which can ensure the reliability of the switching device.

[0205] In some embodiments of the present application, optionally, the acquisition module is further configured to acquire the heating power of the coil assembly; the control module is further configured to, when the type of the cookware is the second type, adjust the switching frequency of the switching device, the duty cycle of the switching device, and / or the first voltage threshold according to the comparison result between the heating power and the target heating power.

[0206] In this embodiment, after controlling the switching device to switch and operate at the corresponding switching frequency according to the type of the cookware and the target heating power, the cooking device continuously acquires the actual heating power of the coil assembly and judges whether the actual heating power meets the target heating power set by the user.

[0207] Specifically, when the type of the cookware is identified as the second type, the cookware is heated by making the coil assembly generate heat, that is, the coil impedance is increased by high-frequency switching to make the coil generate heat. At this time, the factors affecting the heating power include the switching frequency of the switching device, the duty cycle of the switching device, and the turn-off duration of the switching device, where the turn-off duration of the switching device is associated with the first voltage threshold.

[0208] Therefore, when the actual heating power of the coil assembly is less than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the turn-off duration of the switching device can be reduced, that is, the first voltage threshold can be increased, or multiple operations among the above operations can be performed simultaneously, so as to increase the heating power of the coil assembly.

[0209] It can be understood that when the actual heating power of the coil assembly is greater than the target heating power, the switching frequency of the switching device can be correspondingly increased, or the duty cycle of the switching device can be reduced, or the turn-off duration of the switching device can be increased, that is, the first voltage threshold can be reduced, or multiple operations among the above operations can be performed simultaneously, so as to reduce the heating power of the coil assembly.

[0210] In the embodiment of the present application, by collecting the actual heating power of the coil assembly and based on the comparison result between the actual heating power and the target heating power set by the user, the working parameters of the switching device are dynamically adjusted, so that the actual heating power can be maintained within a range matching the target heating power set by the user, ensuring the heating effect of the cooking device.

[0211] In some embodiments of the present application, optionally, the obtaining module is further configured to obtain the heating power of the coil assembly; the control module is further configured to, when the type of the cookware is the first type, adjust the switching frequency of the switching device and / or the duty cycle of the switching device according to the comparison result between the heating power and the target heating power.

[0212] In this embodiment, when the type of the cookware is identified as the first type, inductive heating is adopted, that is, the coil assembly resonates with the resonant capacitor to generate eddy current in the cookware to heat the cookware. At this time, the factors affecting the heating power include the switching frequency of the switching device and the duty cycle of the switching device.

[0213] Therefore, when the actual heating power of the coil assembly is less than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the operations of reducing the switching frequency and increasing the duty cycle can be performed simultaneously, so as to increase the heating power of the coil assembly.

[0214] It can be understood that when the actual heating power of the coil assembly is greater than the target heating power, the switching frequency of the switching device can be correspondingly reduced, or the duty cycle of the switching device can be increased, or the operations of increasing the switching frequency and reducing the duty cycle can be performed simultaneously, so as to reduce the heating power of the coil assembly.

[0215] In the embodiments of the present application, by collecting the actual heating power of the coil assembly and based on the comparison result between the actual heating power and the target heating power set by the user, the operating parameters of the switching device are dynamically adjusted, so that the actual heating power can be maintained within a range matching the target heating power set by the user, ensuring the heating effect of the cooking device.

[0216] In some embodiments of the present application, optionally, the first type of cookware is metal cookware, and the second type of cookware is non-metal cookware.

[0217] In this embodiment, the first type of cookware is metal cookware, and the metal cookware has a good magnetic permeability. Therefore, by generating resonance between the coil assembly and the resonant capacitor, eddy currents can be induced in the metal cookware, and the energy of the eddy currents can heat the metal cookware, thereby realizing inductive heating of the cookware.

[0218] The second type of cookware is non-metal cookware, and the non-metal cookware has a poor magnetic permeability. Therefore, it is impossible to cook through traditional inductive heating. In this regard, in the embodiments of the present application, the impedance value of the coil assembly is increased by increasing the switching frequency of the switching device, so that the coil assembly heats itself, and the cookware is heated by the heat generated by the coil assembly.

[0219] The embodiments of the present application can realize the heating of non-metal cookware without changing the hardware structure of the original inductive heating appliance, improving the versatility of the inductive heating cooking device.

[0220] In some embodiments of the present application, a heating control device for a cooking device is provided. Figure 7 The structural block diagram of the heating control device according to some embodiments of the present application is shown. As Figure 7 shown, the heating control device 700 includes: a memory 702 for storing programs or instructions; a processor 704 for implementing the steps of the heating control method for the cooking device provided in any of the above embodiments when executing the programs or instructions, and thus also including all its beneficial effects. To avoid repetition, it will not be elaborated here.

[0221] A fourth aspect of the present application provides a readable storage medium, on which programs or instructions are stored, and when the programs or instructions are executed by a processor, the steps of the heating control method for the cooking device provided in any of the above embodiments are implemented, and thus also including all its beneficial effects. To avoid repetition, it will not be elaborated here.

[0222] A fifth aspect of the present application provides a cooking device, including the heating control device for the cooking device provided in any of the above embodiments; and / or the readable storage medium provided in any of the above embodiments, and thus also including all its beneficial effects. To avoid repetition, it will not be elaborated here.

[0223] In some embodiments of the present application, optionally, the cooking device further includes: a drive circuit electrically connected to the heating control device and / or the readable storage medium; a switching device electrically connected to the drive circuit, and the drive circuit is used to drive the switching device to switch; a resonant circuit including a resonant capacitor, and the resonant circuit is electrically connected to the switching device; a coil assembly electrically connected to the resonant circuit.

[0224] In this embodiment, the cooking device includes a drive circuit, a switching device, a resonant circuit and a coil assembly. Among them, the drive circuit is electrically connected to the heating control device and is used to generate a drive signal for the switching device, and drive the switching device to change its switching state through the drive signal. The switching device is electrically connected to the resonant circuit. When the switching device switches at a certain switching frequency, the resonant capacitor and the coil assembly generate resonance, thereby generating eddy current in the cookware.

[0225] When using a non-metal cookware, the switching frequency of the switching device is increased, so that the impedance of the coil assembly increases, causing the coil assembly to heat itself, and heating the cookware through the heat generated by the coil assembly.

[0226] The embodiments of the present application can realize the heating of non-metal cookware without changing the hardware structure of the original induction heating cooking device, improving the versatility of the induction heating cooking device.

[0227] The methods can be implemented in various different ways according to specific features and / or example applications. For example, these methods can be implemented through a combination of hardware, firmware, and / or software. For example, in a hardware implementation, the processor can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, electronic devices, other device units for performing the above functions, and / or combinations thereof.

[0228] A computer-readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. A computer-readable storage medium can be an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing devices, without limitation thereto. A non-exhaustive list of more specific examples of computer-readable storage media includes: portable computer floppy disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital versatile disks (DVDs), memory cards, floppy disks, encoding mechanical devices (such as punched cards or grooves with raised structures having instructions recorded thereon), and any suitable combination of the foregoing devices. A computer-readable storage medium as used herein should not be construed as a signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium, or an electrical signal transmitted through a wire, etc.

[0229] In the description of the present application, the term "a plurality of" means two or more, unless otherwise clearly defined. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application; terms such as "connected", "installed", "fixed", etc. should all be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0230] In the description of the present application, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the schematic expressions of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0231] The foregoing is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A heating control method for a cooking device, characterized in that, the cooking device includes a switching device and a coil assembly, the switching device is electrically connected to the coil assembly, and the coil assembly is used to heat a cookware, and the method includes: responding to a cooking instruction, obtaining the type of the cookware, and the cooking instruction indicates a target heating power; when the type of the cookware is the first type, controlling the switching device to switch at a first switching frequency according to the target heating power, so that an eddy current is formed in the cookware by the coil assembly; or when the type of the cookware is the second type, controlling the switching device to switch at a second switching frequency according to the target heating power, so that the coil assembly generates heat and heats the cookware; wherein, the magnetic permeability of the cookware of the first type is higher than that of the cookware of the second type, and the first switching frequency is lower than the second switching frequency.

2. The heating control method according to claim 1, characterized in that, the step of controlling the switching device to switch at the second switching frequency according to the target heating power specifically includes: collecting the voltage amplitude of the input voltage; when the voltage amplitude of the input voltage is less than or equal to a first voltage threshold, controlling the switching device to switch at the second switching frequency; when the voltage amplitude of the input voltage is greater than the first voltage threshold, controlling the switching device to turn off.

3. The heating control method according to claim 2, characterized in that, further includes: obtaining the operating condition data of the switching device; when the type of the cookware is the second type, adjusting the switching frequency of the switching device, the duty cycle of the switching device and / or the first voltage threshold according to the comparison result between the operating condition data and an operating condition threshold.

4. The heating control method according to claim 1, characterized in that, further includes: obtaining the operating condition data of the switching device; when the type of the cookware is the first type, adjusting the switching frequency of the switching device and / or the duty cycle of the switching device according to the comparison result between the operating condition data and an operating condition threshold.

5. The heating control method according to claim 3 or 4, characterized in that, the operating condition data includes: voltage value, current value and temperature value; the operating condition threshold includes: a second voltage threshold, a current threshold and a temperature threshold.

6. The heating control method according to claim 2 or 3, characterized in that, further includes: obtaining the heating power of the coil assembly; when the type of the cookware is the second type, adjusting the switching frequency of the switching device, the duty cycle of the switching device and / or the first voltage threshold according to the comparison result between the heating power and the target heating power.

7. The heating control method according to claim 1 or 4, characterized in that, further includes: obtaining the heating power of the coil assembly; when the type of the cookware is the first type, adjusting the switching frequency of the switching device and / or the duty cycle of the switching device according to the comparison result between the heating power and the target heating power.

8. The heating control method according to any one of claims 1 to 4, characterized in that, the first type of cookware is metal cookware, and the second type of cookware is non-metal cookware.

9. A heating control device for a cooking device, characterized in that, the cooking device includes a switching device and a coil assembly for heating the cookware, and the heating control device includes: an acquisition module, configured to acquire the cookware type of the cookware in response to a cooking instruction, where the cooking instruction indicates a target heating power; a control module, configured to: when the cookware type is the first type, control the switching device to switch at a first switching frequency according to the target heating power, so that an eddy current is formed in the cookware by the coil assembly; or when the cookware type is the second type, control the switching device to switch at a second switching frequency according to the target heating power, so that the coil assembly generates heat and heats the cookware; wherein, the magnetic permeability of the first type of cookware is higher than that of the second type of cookware, and the first switching frequency is lower than the second switching frequency.

10. A heating control device for a cooking device, characterized in that, comprises: a memory, configured to store programs or instructions; a processor, configured to implement the steps of the heating control method for the cooking device according to any one of claims 1 to 8 when executing the programs or instructions.

11. A readable storage medium, on which programs or instructions are stored, characterized in that, when the programs or instructions are executed by a processor, the steps of the heating control method for the cooking device according to any one of claims 1 to 8 are implemented.

12. A cooking device, characterized in that, comprises: the heating control device according to claim 9 or 10; and / or the readable storage medium according to claim 11.

13. The cooking device according to claim 12, characterized in that, further comprises: a drive circuit, electrically connected to the heating control device and / or the readable storage medium; a switching device, the switching device is electrically connected to the drive circuit, and the drive circuit is used to drive the switching device to switch; a resonant circuit, the resonant circuit includes a resonant capacitor, and the resonant circuit is electrically connected to the switching device; a coil assembly, the coil assembly is electrically connected to the resonant circuit.

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