Heating device, control method and device thereof, readable storage medium and cooking equipment

Abstract

The invention provides a heating device, a control method and device thereof, a readable storage medium and cooking equipment, and relates to the technical field of cooking equipment. The heating device comprises a coil assembly, the coil assembly comprises a first coil and a second coil which are connected in parallel, and the resistance value of the first coil is different from that of the second coil; the power supply circuit is used for supplying power to the coil assembly; the switch assembly is connected between the power supply circuit and the coil assembly; the control circuit is connected with the control end of the switch assembly, and the control circuit is used for controlling at least one of the first coil and the second coil to conduct electromagnetic heating through the switch assembly or controlling the first coil to conduct resistance heating.

Description

Technical Field

[0001] The present application relates to the technical field of cooking devices, and in particular, to a heating device, a control method and device thereof, a readable storage medium, and a cooking device. Background Art

[0002] An induction cooker uses the principle of electromagnetic induction to heat cookware, and has advantages such as environmental protection, energy saving, high heating efficiency, and safety.

[0003] In the related art, the coil disk in the induction cooker has relatively high adaptability requirements for cookware, and the coil disk cannot heat cookware made of materials with low magnetic permeability, reducing the versatility of the induction cooker. Summary of the Invention

[0004] The present application aims to solve one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present application provides a heating device, including: a coil assembly, the coil assembly includes a first coil and a second coil connected in parallel, and the resistance value of the first coil is different from that of the second coil; a power supply circuit for supplying power to the coil assembly; a switch assembly connected between the power supply circuit and the coil assembly; a control circuit connected to the control end of the switch assembly, and the control circuit is used to control at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly, or control the first coil to perform resistance heating.

[0006] A second aspect of the present application provides a control method for a heating device.

[0007] A third aspect of the present application provides a control device for a heating device.

[0008] A fourth aspect of the present application provides a control device for a heating device.

[0009] A fifth aspect of the present application provides a readable storage medium.

[0010] A sixth aspect of the present application provides a cooking device.

[0011] In view of this, according to the first aspect of the present application, a heating device is provided, including: a coil assembly, the coil assembly includes a first coil and a second coil connected in parallel, and the resistance value of the first coil is different from that of the second coil; a power supply circuit for supplying power to the coil assembly; a switch assembly connected between the power supply circuit and the coil assembly; a control circuit connected to the control end of the switch assembly, and the control circuit is used to control at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly, or control the first coil to perform resistance heating.

[0012] In this technical solution, the heating device includes a coil assembly, a power supply circuit, a switch assembly, and a control circuit. The coil assembly includes a first coil and a second coil connected in parallel, and the resistance values of the first coil and the second coil are different. The power supply circuit can supply power to the coil assembly. The switch assembly is arranged between the power supply circuit and the coil assembly. The control circuit can adjust whether the first coil is connected to the power supply circuit and whether the second coil is connected to the power supply circuit by controlling the on / off state of the switch assembly, so as to select the first coil and / or the second coil to heat the cookware.

[0013] In this technical solution, the coil assembly further includes a resonant capacitor. Both the first coil and the second coil can oscillate with the resonant capacitor to generate a magnetic field, so as to perform electromagnetic heating on cookware made of metal materials with a relatively high magnetic permeability.

[0014] It should be noted that the above electromagnetic heating by the coil is applicable to cookware made of metal materials with a high magnetic permeability. For cookware with a 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. For cookware with a low magnetic permeability, electromagnetic heating cannot be performed through coil resonance. Therefore, by adjusting the driving frequency of the driving circuit, the coil heats the cookware by means of resistance heating.

[0015] In this technical solution, when the first coil and the second coil are in the energized state, they can also generate heat by themselves due to their own resistance values to perform resistance heating on the cookware. Among them, the resistance value of the first coil is different from that of the second coil. When the heating device heats the cookware by means of resistance heating, the coil with a larger resistance value in the first coil and the second coil can be selected for resistance heating.

[0016] It should be noted that the resistance value is the equivalent resistance of the coil in the energized state, including the DC resistance of the coil and the high-frequency impedance of the coil.

[0017] In the technical solution of this application, by arranging a coil assembly including a first coil and a second coil with different resistance values in the heating device, and correspondingly arranging a switch assembly capable of controlling the energized state of the first coil and the second coil with the power supply circuit, the control circuit can control the energized state and the driving frequency of the first coil and the second coil, so as to realize that at least one of the first coil and the second coil can perform electromagnetic heating on the cookware, and can also control the first coil to perform resistance heating on the cookware, so that the heating assembly can not only perform electromagnetic heating and resistance heating on cookware with a high magnetic permeability, but also perform resistance heating on cookware with a low magnetic permeability, so that the heating device can have a good heating effect on different types of cookware and improve the versatility of the heating device.

[0018] In some technical solutions, optionally, the resistance value of the first coil is greater than that of the second coil.

[0019] In this technical solution, the resistance value of the first coil is R1, and the resistance value of the second coil is R2, where R1 > R2. When the heating device performs electromagnetic heating on the cookware through the coil assembly, at least one of the first coil and the second coil can be selected for electromagnetic heating.

[0020] It should be noted that when the required heating power for electromagnetic heating is small, only the second coil with a smaller resistance value can be selected to perform electromagnetic heating. When the required heating power for electromagnetic heating is large, the first coil and the second coil can be selected to perform electromagnetic heating synchronously.

[0021] In this technical solution, when the heating device performs resistance heating on the cookware through the coil assembly, since the resistance value of the first coil is greater than that of the second coil, under the same driving current, the heat generation efficiency of the first coil is higher than the heat generation effect of the second coil. Therefore, the first coil with a higher resistance value is selected for resistance heating.

[0022] In the technical solution of the present application, by setting the resistance value of the first coil to be greater than that of the second coil, when the heating device performs resistance heating on the cookware, the first coil with a larger resistance value can be selected to perform resistance heating on the cookware. When the heating device performs electromagnetic heating on the cookware, the first coil and the second coil can be selected to perform electromagnetic heating on the cookware synchronously according to actual needs, or the second coil with a smaller resistance value can be selected to heat the cookware. While ensuring the heating efficiency, the power consumption can also be reduced.

[0023] In some technical solutions, the switch assembly includes:

[0024] A first switch element, connected between the second coil and the power supply circuit;

[0025] The control circuit is specifically configured to control the first switch element to be turned off so that the first coil performs resistance heating, or control the first switch element to be turned on so that the first coil and the second coil perform electromagnetic heating synchronously.

[0026] In this technical solution, the switch assembly includes a first switch element connected between the second coil and the power supply circuit, and the first switch element can control whether the second coil is connected to the power supply circuit. Specifically, the first end of the first switch element is connected to the power supply circuit, and the second end of the first switch element is connected to the second coil.

[0027] In this technical solution, by controlling the first switch element to be in the on state, the first coil and the second coil are both connected to the power supply circuit, and the first coil and the second coil can be synchronously driven through the power supply circuit.

[0028] In this technical solution, when the first switch is controlled to be in the off state, only the first coil is connected to the power supply circuit, and only the first coil can be driven by the power supply circuit.

[0029] Exemplarily, when resistively heating a cookware with high magnetic permeability, the first switch is controlled to be in the off state. At this time, only the first coil with a relatively large resistance value is connected to the power supply circuit, and the first coil is energized to generate heat by itself, thereby resistively heating the cookware.

[0030] In the technical solution of the present application, by providing a first switch between the second coil and the power supply circuit, and when the heating device electromagnetically heats the cookware through the coil assembly, the first switch is controlled to conduct, so that the second coil with a smaller resistance electromagnetically heats the cookware. When the heating device resistively heats the cookware through the coil assembly, the first switch is controlled to be off, so that only the first coil with a relatively large resistance resistively heats the cookware, further improving the heating efficiency.

[0031] In some technical solutions, the switch assembly further includes:

[0032] A second switch connected between the first coil and the power supply circuit;

[0033] The control circuit is specifically configured to control the first switch and the second switch to conduct, so that both the first coil and the second coil perform electromagnetic heating; or

[0034] The control circuit is specifically configured to control the first switch to conduct and the second switch to be off, so that the second coil performs electromagnetic heating.

[0035] In this technical solution, the switch assembly further includes a second switch connected between the first coil and the power supply circuit, and the second switch can control whether the first coil is connected to the power supply circuit. Specifically, the first end of the second switch is connected to the power supply circuit, and the second end of the second switch is connected to the first coil.

[0036] In this technical solution, by controlling both the first switch and the second switch to be in the on state, both the first coil and the second coil are connected to the power supply circuit, and the first coil and the second coil can be driven synchronously by the power supply circuit. When the heating device needs to perform high-power electromagnetic heating on the cookware, the first coil and the second coil synchronously perform electromagnetic heating on the cookware.

[0037] In this technical solution, by controlling the first switch to be in the off state and the second switch to be in the on state, only the second coil is connected to the power supply circuit, and only the second coil can be driven by the power supply circuit. When the heating device needs to perform low-power electromagnetic heating on the cookware, only the second coil performs electromagnetic heating on the cookware.

[0038] In the technical solution of this application, a first switching element is arranged between the second coil and the power supply circuit, and a second switching element is arranged between the first coil and the power supply circuit. When the heating device performs high-power electromagnetic heating on the cookware through the coil assembly, the first switching element and the second switching element are controlled to conduct synchronously, so that the first coil and the second coil perform electromagnetic heating on the cookware synchronously, improving the heating efficiency. When the heating device performs low-power electromagnetic heating on the cookware through the coil assembly, the first switching element is controlled to conduct, and the second switching element is turned off, so that only the second coil with a smaller resistance performs electromagnetic heating on the cookware, reducing the heating power consumption.

[0039] In some technical solutions, optionally, the control circuit includes: a controller, a first power supply, and a zero-crossing detection circuit. Among them, the controller is connected to the control terminals of the power supply circuit and the switching assembly; the first power supply is connected to the controller and is used to supply power to the controller. The zero-crossing detection circuit is connected to the controller and is used to detect the zero-crossing point of the voltage output by the power supply circuit.

[0040] In this technical solution, the controller is used to control the power supply circuit, thereby controlling the resonance frequency of the coil assembly. The first power supply is a low-voltage power supply, and this low-voltage power supply can convert the high-voltage signal in the power supply circuit into a low-voltage signal to supply power to the controller. The zero-crossing detection module is used to detect the zero-crossing point of the voltage in the power supply circuit, and control the switching state of the high-frequency switching element in the power supply circuit according to the zero-crossing point of the voltage, reducing the noise during the resonance of the coil assembly.

[0041] In this technical solution, the controller is also used to control the on-off state of the switching assembly.

[0042] In some technical solutions, optionally, the power supply circuit includes: a second power supply, a filter circuit, a rectifier circuit, and an inverter switch circuit. The first end of the filter circuit is connected to the output end of the second power supply, and the second end of the filter circuit is connected to the control circuit; the first end of the rectifier circuit is connected to the second end of the filter circuit; the inverter switch circuit is connected between the second end of the rectifier circuit and the coil assembly.

[0043] In this technical solution, the power supply assembly includes a second power supply, and the second power supply is an AC power supply. The filter circuit is connected to the second power supply and can filter the alternating current output by the second power supply. The filtered alternating current is transmitted to the control assembly for supplying power to the control assembly. The rectifier circuit is connected between the filter circuit and the inverter switch circuit, rectifying the alternating current signal transmitted to the inverter switch circuit to form a direct current signal. The inverter switch circuit is a high-frequency inverter switch element, and the inverter switch circuit can convert the rectified direct current into a high-frequency alternating current signal and transmit it to the resonant capacitor and the coil assembly.

[0044] It should be noted that the inverter switch circuit can be a high-frequency switch component. The inverter switch circuit is connected to the controller in the control circuit, and the controller can control the inverter switch circuit to perform high-frequency switching actions. By adjusting the switching frequency of the inverter switch circuit and the on / off states of the switching components, the control coil assembly performs electromagnetic heating through at least one of the first coil and the second coil, or controls the first coil to perform resistance heating.

[0045] In the technical solution of this application, by arranging a second power supply, a filter circuit, a rectifier circuit, and an inverter switch circuit in the power supply assembly, the power supply assembly can stably supply power to the coil assembly, the resonant capacitor, and the control assembly, improving the stability of the operation of the heating device.

[0046] In some technical solutions, optionally, the number of the first coils is at least two, and / or the number of the second coils is at least two.

[0047] In the technical solution of this application, the number of the first coils and the number of the second coils can both be multiple, thereby being able to improve the heating efficiency when performing resistance heating on the cookware and the heating efficiency when performing electromagnetic heating on the cookware.

[0048] In some technical solutions, the wire harnesses of the first coil and the wire harnesses of the second coil are wound in parallel.

[0049] In this technical solution, the wire harnesses in the first coil are wound into a shape, and the wire harnesses in the second coil are also wound into a shape. Specifically, they can be wound spirally or wound in a rotary manner. The spirally wound first coil and second coil can form an annular or circular heating area.

[0050] On this basis, the first coil and the second coil are wound in parallel in the same direction, that is, the wire harnesses in the first coil and the wire harnesses in the second coil are arranged side by side in the same direction and have the same winding direction. Taking the spiral winding of the first coil and the second coil as an example, the second coil is inserted into the gaps between the layers of the first coil to form the first coil and the second coil with the same winding direction and nested inside and outside.

[0051] By winding the first coil and the second coil in parallel, the heating area generated by the first coil and the heating area generated by the second coil can at least partially overlap, so that a single area on the cooking device can simultaneously meet the electromagnetic heating requirement and the thermal radiation heating requirement, eliminating the operation for the user to distinguish the heating area and select the material of the cooking device, and further achieving the technical effects of optimizing the coil disk structure layout, improving the practicality of the coil disk, and enhancing the user experience.

[0052] According to a second aspect of the present application, a control method for a heating device is provided, which is applied to the heating device in any of the above technical solutions. The control method for the heating device includes: obtaining heating information; and according to the heating information, controlling at least one of a first coil and a second coil to perform electromagnetic heating through a switch assembly, or controlling the first coil to perform resistance heating.

[0053] In this technical solution, the heating information is the heating information of the heating device heating a cookware through a coil assembly. According to this heating information, the heating method of heating the cookware by the coil disc assembly can be selected. The heating methods include electromagnetic heating through at least one of the first coil and the second coil in the coil assembly, and also include resistance heating of the cookware only through the first coil.

[0054] In the technical solution of the present application, a coil assembly including a first coil and a second coil with different resistance values is provided in the heating device. By controlling the energization states and driving frequencies of the first coil and the second coil, it is possible to control at least one of the first coil and the second coil to perform electromagnetic heating on the cookware, and also to control the first coil to perform resistance heating on the cookware, so that the heating assembly can perform electromagnetic heating and resistance heating on cookware with high magnetic permeability, and can also perform resistance heating on cookware with low magnetic permeability, enabling the heating device to have a good heating effect on different types of cookware and improving the versatility of the heating device.

[0055] In some technical solutions, optionally, the heating information includes a cooking stage;

[0056] According to the heating information, controlling at least one of the first coil and the second coil to perform electromagnetic heating through a switch assembly, or controlling the first coil to perform resistance heating, includes:

[0057] Based on the cooking stage being the preheating stage, controlling the first coil to perform resistance heating through the switch assembly; or

[0058] Based on the cooking stage being the heating stage, controlling at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly.

[0059] In this technical solution, the heating information includes a cooking stage, and the cooking stage includes but is not limited to a preset stage and a heating stage. Among them, the preheating stage is a stage for uniformly preheating the cookware. In the preset stage, the requirement for the temperature rising speed of the cookware is relatively low, and the heating stage is a stage for quickly heating the ingredients in the cookware. In the heating stage, the requirement for the temperature rising speed of the cookware is relatively high.

[0060] In this technical solution, when it is determined that the cooking stage is the preheating stage, by controlling the on / off state of the switch component, the first coil with a higher resistance value is connected to the power supply circuit, and the second coil with a lower resistance value is not connected to the power supply circuit, that is, the cooking utensil is resistively heated only by the first coil. Since the resistance value of the first coil is greater than that of the second coil, under the same driving current, the heating efficiency of the first coil is higher than that of the second coil. Therefore, the first coil with a higher resistance value is selected for resistive heating.

[0061] In this technical solution, when it is determined that the cooking stage is the heating stage, by controlling the on / off state of the switch component, the first coil with a higher resistance value and the second coil with a lower resistance value are both connected to the power supply circuit, that is, the cooking utensil is electromagnetically heated by the first coil and the second coil synchronously.

[0062] It should be noted that the heating device can obtain a heating control instruction and determine the current cooking stage based on the heating control instruction.

[0063] In the technical solution of the present application, the heating information includes the cooking stage. Under different control stages, the cooking utensil is heated by different heating methods. In the preheating stage, the requirement for the heating efficiency of the cooking utensil is relatively low, and the requirement for heating uniformity is relatively high. Then, the cooking utensil is resistively heated only by the first coil with a larger resistance value. In the heating stage, the requirement for the heating efficiency of the cooking utensil is relatively high. Then, electromagnetic heating is performed by at least one of the first coil and the second coil to improve the heating efficiency.

[0064] In some technical solutions, optionally, the heating device is used to heat the cooking utensil, and the heating information includes the type of the cooking utensil;

[0065] According to the heating information, at least one of the first coil and the second coil is controlled by the switch component to perform electromagnetic heating, or the first coil is controlled to perform resistive heating, including:

[0066] Based on the type of the cooking utensil being the first type, at least one of the first coil and the second coil is controlled by the switch component to perform electromagnetic heating; or

[0067] Based on the type of the cooking utensil being the second type, the switch component is used to control the first coil to perform resistive heating

[0068] In this technical solution, the heating information includes the type of the cooking utensil. Different types of cooking utensils are suitable for different heating methods. When the type of the cooking utensil is the first type, electromagnetic heating is selected to be performed on it through the coil component. When the type of the cooking utensil is the second type, resistive heating is selected to be performed on it through the coil component.

[0069] In this technical solution, when it is determined that the type of cookware is the first type, by controlling the on / off state of the switch component, the first coil with a higher resistance value and the second coil with a lower resistance value are both connected to the power supply circuit, that is, the cookware is electromagnetically heated by the first coil and the second coil synchronously.

[0070] In this technical solution, when it is determined that the type of cookware is the second type, by controlling the on / off state of the switch component, the first coil with a higher resistance value is connected to the power supply circuit, and the second coil with a lower resistance value is not connected to the power supply circuit, that is, the cookware is resistively heated only by the first coil. Since the resistance value of the first coil is greater than that of the second coil, the heating efficiency of the first coil is higher than the heating effect of the second coil under the same driving current. Therefore, the first coil with a higher resistance value is selected for resistive heating.

[0071] In the technical solution of the present application, the heating information includes the type of cookware. When the types of cookware required to be heated by the heating device are different, the cookware is heated by different heating methods. When the type of cookware is the first type with high magnetic permeability, electromagnetic heating is performed by at least one of the first coil and the second coil to improve the heating efficiency. When the type of cookware is the second type with low magnetic permeability, the cookware is resistively heated only by the first coil with a larger resistance value. This enables the heating device to heat different types of cookware, improving the versatility of the heating device.

[0072] According to the third aspect of the present application, a control device for a heating device is proposed, which is applied to the heating device in any of the above technical solutions. The control device of the heating device includes: an acquisition module for acquiring heating information; a control module for controlling at least one of the first coil and the second coil to perform electromagnetic heating or controlling the first coil to perform resistive heating through the switch component according to the heating information.

[0073] In this technical solution, the heating information is the heating information of the heating device heating the cookware through the coil assembly. According to this heating information, the heating method of the coil disc assembly for heating the cookware can be selected. The heating methods include electromagnetic heating by at least one of the first coil and the second coil in the coil assembly, and also include resistively heating the cookware only by the first coil.

[0074] In the technical solution of the present application, a coil assembly including a first coil and a second coil with different resistance values is provided in a heating device. By controlling the energization states of the first coil and the second coil, as well as the driving frequency, it is possible to control at least one of the first coil and the second coil to perform electromagnetic heating on a cookware, and it is also possible to control the first coil to perform resistance heating on the cookware, so that the heating assembly can perform both electromagnetic heating and resistance heating on cookware with high magnetic permeability, and can also perform resistance heating on cookware with low magnetic permeability, enabling the heating device to have a good heating effect on different types of cookware and improving the versatility of the heating device.

[0075] According to a fourth aspect of the present application, a control device for a heating device is provided, including: a memory in which programs or instructions are stored; a processor that executes the programs or instructions stored in the memory 604 to implement the steps of the control method for the heating device in any of the technical solutions, and thus has all the beneficial technical effects of the control method for the heating device in any of the above technical solutions, and will not be elaborated here too much.

[0076] According to a fifth aspect of the present application, a readable storage medium is provided, on which programs or instructions are stored, and when the programs or instructions are executed by a processor, the steps of the control method for the heating device in any of the above technical solutions are implemented. Thus, it has all the beneficial technical effects of the control method for the heating device in any of the above technical solutions, and will not be elaborated here too much.

[0077] According to a sixth aspect of the present application, a cooking device is provided, including: the heating device in any of the above technical solutions; and / or a control device for the heating device in any of the above technical solutions; and / or the readable storage medium in any of the above technical solutions. Therefore, it has all the beneficial technical effects of the heating device in any of the above technical solutions; and / or a control device for the heating device in any of the above technical solutions; and / or the readable storage medium in any of the above technical solutions, and will not be elaborated here too much.

[0078] The additional aspects and advantages of the present application will become apparent in the following description section, or be learned through the practice of the present application. Description of the Drawings

[0079] The above and / or additional aspects and advantages of the present application will become apparent and be easily understood from the description of the embodiments in conjunction with the following drawings, where:

[0080] Figure 1 One of the circuit diagrams of the heating device provided in some embodiments of the present application is shown;

[0081] Figure 2 Another circuit diagram of the heating device provided in some embodiments of the present application is shown;

[0082] Figure 3 The schematic structural diagrams of the first coil and the second coil provided in some embodiments of the present application are shown;

[0083] Figure 4 The flowchart of the control method of the heating device provided in some embodiments of the present application is shown;

[0084] Figure 5 One of the structural block diagrams of the control device of the heating device provided in some embodiments of the present application is shown;

[0085] Figure 6 Another structural block diagram of the control of the heating device provided in some embodiments of the present application is shown;

[0086] Figure 7 The structural block diagram of the cooking device provided in some embodiments of the present application is shown.

[0087] Figures 1 to 3 The reference numerals are as follows:

[0088] 100 Heating device, 110 Coil assembly, L1 First coil, L2 Second coil, 120 Power supply circuit, 122 Second power supply, 124 Filter circuit, 126 Rectification circuit, 128 Inverter switch circuit, 130 Switch assembly, 132 First switch element, 134 Second switch element, 140 Control circuit, 142 Controller, 144 First power supply, 146 Zero-crossing detection circuit. Detailed implementation manners

[0089] In order to be able to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the features in this embodiment and the embodiments can be combined with each other.

[0090] Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0091] Next, refer to Figures 1 to 7 Describe a heating device and its control method, device, readable storage medium and cooking device according to some embodiments of the present application.

[0092] In one embodiment of the present application, as Figure 1 and Figure 2 shown, a heating device 100 is proposed, including: a coil assembly 110, a power supply circuit 120, a switch assembly 130 and a control circuit 140.

[0093] Among them, the coil assembly 110 includes a first coil L1 and a second coil L2 connected in parallel, and the resistance value of the first coil L1 is different from that of the second coil L2; the power supply circuit 120 is used to supply power to the coil assembly 110; the switch assembly 130 is connected between the power supply circuit 120 and the coil assembly 110; the control circuit 140 is connected to the control end of the switch assembly 130, and the control circuit 140 is used to control at least one of the first coil L1 and the second coil L2 to perform electromagnetic heating through the switch assembly 130, or control the first coil L1 to perform resistance heating.

[0094] In this embodiment, the heating device 100 includes a coil assembly 110, a power supply circuit 120, a switch assembly 130, and a control circuit 140. The coil assembly 110 includes a first coil L1 and a second coil L2 connected in parallel, and the resistance values of the first coil L1 and the second coil L2 are different. The power supply circuit 120 can supply power to the coil assembly 110. The switch assembly 130 is disposed between the power supply circuit 120 and the coil assembly 110. The control circuit 140 can adjust whether the first coil L1 is connected to the power supply circuit 120 and whether the second coil L2 is adjusted to be connected to the power supply circuit 120 by controlling the on / off state of the switch assembly 130, so as to select the first coil L1 and / or the second coil L2 to heat the cookware.

[0095] Exemplarily, the power supply assembly includes a high-frequency switch, such as an inverter switch, specifically an IGBT (Insulated Gate Bipolar Transistor) switch or a MOS (Metal Oxide Semiconductor) switch. By performing a high-frequency switching action through the high-frequency switch, the first coil L1 and the second coil L2 in the coil assembly 110 oscillate with a resonant capacitor to generate a magnetic field to perform electromagnetic heating on the cookware.

[0096] In this embodiment, the coil assembly 110 further includes a resonant capacitor. Both the first coil L1 and the second coil L2 can oscillate with the resonant capacitor to generate a magnetic field, so as to perform electromagnetic heating on cookware made of a metal material with a relatively high permeability.

[0097] It should be noted that the above electromagnetic heating of the coil is applicable to cookware made of a metal material with a high permeability. For cookware with a low 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. For cookware with a low permeability, electromagnetic heating cannot be performed through coil resonance. Therefore, by adjusting the driving frequency of the driving circuit, the coil heats the cookware by means of resistance heating.

[0098] In this embodiment, when the first coil L1 and the second coil L2 are in the energized state, due to their own resistance values, they can also generate heat by self - energization to perform resistance heating on the cookware. Among them, the resistance value of the first coil L1 is different from that of the second coil L2. When the heating device 100 heats the cookware by resistance heating, the coil with the larger resistance value among the first coil L1 and the second coil L2 can be selected for resistance heating.

[0099] Exemplarily, the resistance value of the first coil L1 is greater than that of the second coil L2. When resistance heating of the cookware is required, the on - off state of the switch assembly 130 is controlled to connect the first coil L1 with the larger resistance value to the power supply circuit 120. The power supply circuit 120 supplies power to the first coil L1, and the first coil L1 generates heat by itself to heat the cookware. Since the first coil L1 has a relatively high resistance value, its self - heating efficiency is higher compared to connecting the second coil L2 to the power supply circuit 120.

[0100] It should be noted that the resistance value is the equivalent resistance of the coil in the energized state, including the DC resistance of the coil and the high - frequency impedance of the coil.

[0101] In the embodiment of the present application, by providing a coil assembly 110 including a first coil L1 and a second coil L2 with different resistance values in the heating device 100, and correspondingly providing a switch assembly 130 capable of controlling the energized state of the first coil L1 and the second coil L2 with the power supply circuit 120, the control circuit 140 can control the energized state and the driving frequency of the first coil L1 and the second coil L2, so as to control at least one of the first coil L1 and the second coil L2 to perform electromagnetic heating on the cookware, and can also control the first coil L1 to perform resistance heating on the cookware. The heating assembly can not only perform electromagnetic heating and resistance heating on cookware with high magnetic permeability, but also perform resistance heating on cookware with low magnetic permeability, enabling the heating device 100 to have a good heating effect on different types of cookware and improving the versatility of the heating device 100.

[0102] In some embodiments, optionally, the resistance value of the first coil L1 is greater than that of the second coil L2.

[0103] In this embodiment, the resistance value of the first coil L1 is R1, and the resistance value of the second coil L2 is R2, where R1 > R2. When the heating device 100 performs electromagnetic heating on the cookware through the coil assembly 110, at least one of the first coil L1 and the second coil L2 can be selected for electromagnetic heating.

[0104] Exemplarily, when electromagnetic heating is performed on a cookware with high magnetic permeability, by controlling the on-off state of the switch component assembly, both the first coil L1 and the second coil L2 are connected to the power supply circuit 120, and the first coil L1 and the second coil L2 are driven at a preset frequency to oscillate with the resonant capacitor to generate a magnetic field, thereby performing electromagnetic heating on the cookware with high magnetic permeability.

[0105] Exemplarily, when electromagnetic heating is performed on a cookware with high magnetic permeability, by controlling the on-off state of the switch component assembly, only the second coil L2 with a smaller resistance value is connected to the power supply circuit 120, and the second coil L2 is driven at a preset frequency to oscillate with the resonant capacitor to generate a magnetic field, thereby performing electromagnetic heating on the cookware with high magnetic permeability.

[0106] It should be noted that when the heating power required for electromagnetic heating is small, only the second coil L2 with a smaller resistance value can be selected to drive for electromagnetic heating. When the heating power required for electromagnetic heating is large, the first coil L1 and the second coil L2 can be selected to be driven synchronously for electromagnetic heating.

[0107] In this embodiment, when the heating device 100 performs resistance heating on the cookware through the coil assembly 110, since the resistance value of the first coil L1 is greater than that of the second coil L2, the heating efficiency of the first coil L1 is higher than the heating effect of the second coil L2 under the same driving current. Therefore, the first coil L1 with a higher resistance value is selected for resistance heating.

[0108] In the embodiment of the present application, by setting the resistance value of the first coil L1 to be greater than that of the second coil L2, when the heating device 100 performs resistance heating on the cookware, the first coil L1 with a larger resistance value can be selected to perform resistance heating on the cookware. When the heating device 100 performs electromagnetic heating on the cookware, the first coil L1 and the second coil L2 can be selected to perform electromagnetic heating on the cookware synchronously according to actual needs, or the second coil L2 with a smaller resistance value can be selected to heat the cookware, which can reduce power consumption while ensuring the heating efficiency.

[0109] As Figure 1 shown, in some embodiments, the switch assembly 130 includes:

[0110] The first switch 132 is connected between the second coil L2 and the power supply circuit 120;

[0111] The control circuit 140 is specifically configured to control the first switch 132 to be turned off so that the first coil L1 performs resistance heating, or control the first switch 132 to be turned on so that the first coil L1 and the second coil L2 perform electromagnetic heating synchronously.

[0112] In this embodiment, the switch assembly 130 includes a first switch 132 connected between the second coil L2 and the power supply circuit 120. The first switch 132 can control whether the second coil L2 is connected to the power supply circuit 120. Specifically, the first end of the first switch 132 is connected to the power supply circuit 120, and the second end of the first switch 132 is connected to the second coil L2.

[0113] Exemplarily, the first end of the first switch 132 is connected to a high-frequency switch in the power supply circuit 120.

[0114] In this embodiment, by controlling the first switch 132 to be in the on state, both the first coil L1 and the second coil L2 are connected to the power supply circuit 120, and the power supply circuit 120 can synchronously drive the first coil L1 and the second coil L2.

[0115] Exemplarily, when electromagnetic heating is performed on a cookware with high magnetic permeability, the first switch 132 is controlled to be in the on state, so that the first coil L1 and the second coil L2 are synchronously connected to the power supply circuit 120, and the first coil L1 and the second coil L2 are driven to oscillate with the resonant capacitor at a preset frequency to generate a magnetic field, thereby performing electromagnetic heating on the cookware with high magnetic permeability.

[0116] In this embodiment, when the first switch 132 is controlled to be in the off state, only the first coil L1 is connected to the power supply circuit 120, and the power supply circuit 120 can only drive the first coil L1.

[0117] Exemplarily, when resistance heating is performed on a cookware with high magnetic permeability, the first switch 132 is controlled to be in the off state. At this time, only the first coil L1 with a larger resistance value is connected to the power supply circuit 120, and the first coil L1 is energized to generate heat by itself, thereby performing resistance heating on the cookware.

[0118] In the embodiment of the present application, by providing the first switch 132 between the second coil L2 and the power supply circuit 120, and when the heating device 100 performs electromagnetic heating on the cookware through the coil assembly 110, the first switch 132 is controlled to be turned on, so that the second coil L2 with a smaller resistance performs electromagnetic heating on the cookware. When the heating device 100 performs resistance heating on the cookware through the coil assembly 110, the first switch 132 is controlled to be turned off, so that only the first coil L1 with a larger resistance performs resistance heating on the cookware, further improving the heating efficiency.

[0119] As Figure 2 shown, in some embodiments, the switch assembly 130 further includes:

[0120] A second switch 134 connected between the first coil L1 and the power supply circuit 120;

[0121] The control circuit 140 is specifically configured to control the first switch 132 and the second switch 134 to conduct, so that both the first coil L1 and the second coil L2 perform electromagnetic heating; or

[0122] The control circuit 140 is specifically configured to control the first switch 132 to conduct and the second switch 134 to disconnect, so that the second coil L2 performs electromagnetic heating.

[0123] In this embodiment, the switch assembly further includes a second switch 134 connected between the first coil L1 and the power supply circuit 120, and the second switch 134 can control whether the first coil L1 is connected to the power supply circuit 120. Specifically, the first end of the second switch 134 is connected to the power supply circuit 120, and the second end of the second switch 134 is connected to the first coil L1.

[0124] Exemplarily, the first end of the second switch 134 is connected to a high-frequency switch in the power supply circuit 120.

[0125] In this embodiment, by controlling both the first switch 132 and the second switch 134 to be in the conducting state, both the first coil L1 and the second coil L2 are connected to the power supply circuit 120, and the power supply circuit 120 can drive the first coil L1 and the second coil L2 synchronously. When the heating device 100 needs to perform high-power electromagnetic heating on the cookware, the first coil L1 and the second coil L2 perform electromagnetic heating on the cookware synchronously.

[0126] Exemplarily, when performing high-power electromagnetic heating on a cookware with high magnetic permeability, control the first switch 132 and the second switch 134 to be in the conducting state, so that the first coil L1 and the second coil L2 are synchronously connected to the power supply circuit 120, and drive the first coil L1 and the second coil L2 to oscillate with the resonant capacitor at a preset frequency to generate a magnetic field, thereby performing high-power electromagnetic heating on the cookware with high magnetic permeability.

[0127] In this embodiment, by controlling the first switch 132 to be in the off state and the second switch 134 to be in the on state, only the second coil L2 is connected to the power supply circuit 120, and the power supply circuit 120 can only drive the second coil L2. When the heating device 100 needs to perform low-power electromagnetic heating on the cookware, only the second coil L2 performs electromagnetic heating on the cookware.

[0128] Exemplarily, when performing low-power electromagnetic heating on a cookware with high magnetic permeability, control the first switch 132 to be in the off state, so that the first coil L1 with a larger resistance value is no longer connected to the power supply circuit 120, and the second coil L2 with a smaller resistance value is connected to the power supply circuit 120, and drive the second coil L2 to oscillate with the resonant capacitor at a preset frequency to generate a magnetic field, thereby performing low-power electromagnetic heating on the cookware with high magnetic permeability.

[0129] In the embodiments of the present application, a first switching element 132 is provided between the second coil L2 and the power supply circuit 120, and a second switching element 134 is provided between the first coil L1 and the power supply circuit 120. When the heating device 100 performs high-power electromagnetic heating on the cookware through the coil assembly 110, the first switching element 132 and the second switching element 134 are controlled to conduct synchronously, so that the first coil L1 and the second coil L2 perform electromagnetic heating on the cookware synchronously, improving the heating efficiency. When the heating device 100 performs low-power electromagnetic heating on the cookware through the coil assembly 110, the first switching element 132 is controlled to conduct, and the second switching element 134 is turned off, so that only the second coil L2 with a smaller resistance performs electromagnetic heating on the cookware, reducing the heating power consumption.

[0130] As Figure 1 and Figure 2 shown, in some embodiments, optionally, the control circuit 140 includes: a controller 142, a first power supply 144, and a zero-crossing detection circuit 146. Among them, the controller 142 is connected to the control terminals of the power supply circuit 120 and the switching assembly 130; the first power supply 144 is connected to the controller 142 and is used to supply power to the controller 142. The zero-crossing detection circuit 146 is connected to the controller 142 and is used to detect the zero-crossing point of the voltage output by the power supply circuit 120.

[0131] In this embodiment, the controller 142 is used to control the power supply circuit 120, thereby controlling the resonance frequency of the coil assembly 110. The first power supply 144 is a low-voltage power supply, and this low-voltage power supply can convert the high-voltage signal in the power supply circuit 120 into a low-voltage signal to supply power to the controller 142. The zero-crossing detection module is used to detect the zero-crossing point of the voltage in the power supply circuit 120, and control the switching state of the high-frequency switching element in the power supply circuit 120 according to the zero-crossing point of the voltage, reducing the noise during the resonance of the coil assembly 110.

[0132] In this embodiment, the controller 142 is further used to control the on-off state of the switching assembly 130.

[0133] Exemplarily, the power supply circuit 120 includes a high-frequency switching element. The controller 142 is connected to the high-frequency switching element, and the controller 142 can control the high-frequency switching element to perform high-frequency switching actions. By adjusting the switching frequency of the high-frequency switching element and the on-off state of the switching assembly 130, it is controlled that the coil assembly 110 performs electromagnetic heating through at least one of the first coil L1 and the second coil L2, or controls the first coil L1 to perform resistance heating.

[0134] As Figure 1 and Figure 2As shown, in some embodiments, optionally, the power supply circuit 120 includes: a second power supply 122, a filter circuit 124, a rectifier circuit 126, and an inverter switch circuit 128. The first end of the filter circuit 124 is connected to the output end of the second power supply 122, and the second end of the filter circuit 124 is connected to the control circuit 140; the first end of the rectifier circuit 126 is connected to the second end of the filter circuit 124; the inverter switch circuit 128 is connected between the second end of the rectifier circuit 126 and the coil assembly 110.

[0135] In this embodiment, the power supply assembly includes a second power supply 122, and the second power supply 122 is an AC power supply. The filter circuit 124 is connected to the second power supply 122 and can filter the alternating current output by the second power supply 122. The filtered alternating current is transmitted to the control assembly for powering the control assembly. The rectifier circuit 126 is connected between the filter circuit 124 and the inverter switch circuit 128 to rectify the alternating current signal transmitted to the inverter switch circuit 128 to form a direct current signal. The inverter switch circuit 128 is a high-frequency inverter switch component, and the inverter switch circuit 128 can convert the rectified direct current into a high-frequency alternating current signal and transmit it to the resonant capacitor and the coil assembly 110.

[0136] It should be noted that the inverter switch circuit 128 can be a high-frequency switch component, and the inverter switch circuit 128 is connected to the controller 142 in the control circuit 140. The controller 142 can control the inverter switch circuit 128 to perform high-frequency switching actions. By adjusting the switching frequency of the inverter switch circuit 128 and the on / off state of the switch component 130, the coil assembly 110 is controlled to perform electromagnetic heating through at least one of the first coil L1 and the second coil L2, or the first coil L1 is controlled to perform resistance heating.

[0137] Exemplarily, the inverter switch circuit 128 is an IGBT (Insulated Gate Bipolar Transistor) switch component or a MOS (Metal Oxide Semiconductor) switch component.

[0138] Exemplarily, the rectifier circuit 126 can be a rectifier circuit, and the filter circuit 124 can be a capacitor filter circuit 124, a capacitor-inductor filter circuit 124, or an inductor filter circuit 124.

[0139] Exemplarily, the control assembly includes a first power supply 144. The first power supply 144 can receive the filtered alternating current signal and convert the alternating current signal into a low-voltage signal to power the controller 142.

[0140] Exemplarily, the second power supply 122 can be a mains power supply.

[0141] In the embodiments of the present application, by providing a second power supply 122, a filter circuit 124, a rectifier circuit 126, and an inverter switch circuit 128 in the power supply assembly, the power supply assembly can stably supply power to the coil assembly 110, the resonant capacitor, and the control assembly, improving the operating stability of the heating device 100.

[0142] In some embodiments, optionally, the number of the first coils L1 is at least two, and / or the number of the second coils L2 is at least two.

[0143] In the embodiments of the present application, the number of the first coils L1 and the number of the second coils L2 can both be multiple, so as to improve the heating efficiency when resistively heating the cookware and the heating efficiency when electromagnetically heating the cookware.

[0144] As Figure 3 shown, in some embodiments, the wire harnesses of the first coils L1 and the wire harnesses of the second coils L2 are wound in parallel.

[0145] In this embodiment, the wire harnesses in the first coils L1 are wound into a shape, and the wire harnesses in the second coils L2 are also wound into a shape. Specifically, they can be wound in a spiral or a revolution. The spirally wound first coils L1 and second coils L2 can form an annular or circular heating area.

[0146] On this basis, the first coils L1 and the second coils L2 are wound in parallel in the same direction, that is, the wire harnesses in the first coils L1 and the wire harnesses in the second coils L2 are arranged side by side in the same direction and have the same winding direction. Taking the spiral winding of the first coils L1 and the second coils L2 as an example, the second coils L2 are inserted into the gaps between the layers of the first coils L1 to form the first coils L1 and the second coils L2 with the same winding direction and nested inside and outside.

[0147] By winding the first coils L1 and the second coils L2 in parallel, the heating area generated by the first coils L1 and the heating area generated by the second coils L2 can at least partially overlap, so that a single area on the cooking device can simultaneously meet the electromagnetic heating requirement and the thermal radiation heating requirement, eliminating the operation of the user to distinguish the heating area and select the material of the cooking device, and further achieving the technical effects of optimizing the coil disk structure layout, improving the practicability of the coil disk, and enhancing the user experience.

[0148] According to an embodiment of the present application, as Figure 4 shown, a control method for a heating device is proposed, which is applied to the heating device in any of the above embodiments. The control method for the heating device includes:

[0149] Step 402, obtaining heating information;

[0150] Step 404: According to the heating information, control at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly, or control the first coil to perform resistance heating.

[0151] In this embodiment, the heating information is the heating information of the heating device heating the cookware through the coil assembly. According to this heating information, the heating method of the coil disc assembly for heating the cookware can be selected. The heating methods include performing electromagnetic heating through at least one of the first coil and the second coil in the coil assembly, and also include performing resistance heating on the cookware only through the first coil.

[0152] Exemplarily, the heating information includes but is not limited to the cookware type. When the cookware is a high-permeability metal cookware, electromagnetic heating is performed through at least one of the first coil and the second coil. When the cookware is a low-permeability cookware, resistance heating is performed on the cookware through the first coil.

[0153] In the embodiment of the present application, a coil assembly including a first coil and a second coil with different resistance values is provided in the heating device. By controlling the energization states and driving frequencies of the first coil and the second coil, it is possible to control at least one of the first coil and the second coil to perform electromagnetic heating on the cookware, and it is also possible to control the first coil to perform resistance heating on the cookware, so that the heating assembly can perform electromagnetic heating and resistance heating on high-permeability cookware, and can also perform resistance heating on low-permeability cookware, enabling the heating device to have a good heating effect on different types of cookware and improving the versatility of the heating device.

[0154] In some embodiments, optionally, the heating information includes the cooking stage;

[0155] According to the heating information, controlling at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly, or controlling the first coil to perform resistance heating, includes:

[0156] Based on the cooking stage being the preheating stage, control the first coil to perform resistance heating through the switch assembly; or

[0157] Based on the cooking stage being the heating stage, control at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly.

[0158] In this embodiment, the heating information includes the cooking stage, and the cooking stage includes but is not limited to the preset stage and the heating stage. Among them, the preheating stage is the stage of uniformly preheating the cookware. In the preset stage, the temperature rise speed requirement for the cookware is relatively low. The heating stage is the stage of quickly heating the ingredients in the cookware. In the heating stage, the temperature rise speed requirement for the cookware is relatively high.

[0159] In this embodiment, when it is determined that the cooking stage is the preheating stage, by controlling the on-off state of the switch assembly, the first coil with a higher resistance value is connected to the power supply circuit, and the second coil with a lower resistance value is not connected to the power supply circuit, that is, only the first coil is used to resistively heat the cookware. Since the resistance value of the first coil is greater than that of the second coil, under the same driving current, the heating efficiency of the first coil is higher than that of the second coil. Therefore, the first coil with a higher resistance value is selected for resistive heating.

[0160] Exemplarily, the switch assembly includes a first switch. The first switch is connected between the second coil and the power supply circuit. When resistively heating a cookware with high magnetic permeability, the first switch is controlled to be in the off state. At this time, only the first coil with a larger resistance value is connected to the power supply circuit, and the first coil is energized to generate heat by itself to resistively heat the cookware.

[0161] In this embodiment, when it is determined that the cooking stage is the heating stage, by controlling the on-off state of the switch assembly, the first coil with a higher resistance value and the second coil with a lower resistance value are both connected to the power supply circuit, that is, the first coil and the second coil are used to synchronously electromagnetic-heat the cookware.

[0162] Exemplarily, the switch assembly includes a first switch and a second switch. The first switch is connected between the second coil and the power supply circuit, and the second switch is connected between the first coil and the power supply circuit. When resistively heating a cookware with high magnetic permeability, the first switch and the second switch are controlled to be in the on state. At this time, the first coil with a larger resistance value and the second coil with a smaller resistance value are both connected to the power supply circuit, and the first coil and the second coil are used to synchronously electromagnetic-heat the cookware to achieve high-power electromagnetic heating of the cookware.

[0163] It should be noted that the heating device can obtain a heating control instruction and determine the current cooking stage based on the heating control instruction.

[0164] In the embodiment of the present application, the heating information includes the cooking stage. Under different control stages, the cookware is heated by different heating methods. In the preheating stage, the requirement for the heating efficiency of the cookware is low, and the requirement for heating uniformity is high. Then, only the first coil with a larger resistance value is used to resistively heat the cookware. In the heating stage, the requirement for the heating efficiency of the cookware is high. Then, electromagnetic heating is performed through at least one of the first coil and the second coil to improve the heating efficiency.

[0165] In some embodiments, optionally, the heating device is used to heat the cookware, and the heating information includes the cookware type;

[0166] According to the heating information, controlling at least one of the first coil and the second coil to perform electromagnetic heating, or controlling the first coil to perform resistive heating through the switch assembly, includes:

[0167] Based on the cookware type being the first type, at least one of the first coil and the second coil is controlled by a switch assembly to perform electromagnetic heating; or

[0168] Based on the cookware type being the second type, the first coil is controlled by a switch assembly to perform resistive heating

[0169] In this embodiment, the heating information includes the cookware type. Different cookware types are suitable for different heating methods. When the cookware type is the first type, it is selected to perform electromagnetic heating on it through the coil assembly. When the cookware type is the second type, it is selected to perform resistive heating on it through the coil assembly.

[0170] The following takes the first type as a high-permeability metal cookware and the second type as a low-permeability cookware as an example for illustration.

[0171] In this embodiment, when it is determined that the cookware type is the first type, by controlling the on-off state of the switch assembly, the first coil with a higher resistance value and the second coil with a lower resistance value are both connected to the power supply circuit, that is, the cookware is subjected to electromagnetic heating synchronously through the first coil and the second coil.

[0172] Exemplarily, the switch assembly includes a first switch and a second switch. The first switch is connected between the second coil and the power supply circuit, and the second switch is connected between the first coil and the power supply circuit. When performing resistive heating on a high-permeability cookware, the first switch and the second switch are both controlled to be in the on state. At this time, the first coil with a larger resistance value and the second coil with a smaller resistance are both connected to the power supply circuit, and the cookware is subjected to electromagnetic heating synchronously through the first coil and the second coil, realizing high-power electromagnetic heating of the cookware.

[0173] In this embodiment, when it is determined that the cookware type is the second type, by controlling the on-off state of the switch assembly, the first coil with a higher resistance value is connected to the power supply circuit, and the second coil with a lower resistance value is not connected to the power supply circuit, that is, only the first coil is used to perform resistive heating on the cookware. Since the resistance value of the first coil is greater than that of the second coil, the heating efficiency of the first coil is higher than the heating effect of the second coil under the same driving current. Therefore, the first coil with a higher resistance value is selected for resistive heating.

[0174] Exemplarily, the switch assembly includes a first switch. The first switch is connected between the second coil and the power supply circuit. When performing resistive heating on a high-permeability cookware, the first switch is controlled to be in the off state. At this time, only the first coil with a larger resistance value is connected to the power supply circuit, and the first coil generates heat by itself when powered on to perform resistive heating on the cookware.

[0175] In the embodiments of the present application, the heating information includes the type of cookware. When the types of cookware required by the heating device are different, the cookware is heated by different heating methods. When the type of cookware is the first type with high magnetic permeability, electromagnetic heating is performed through at least one of the first coil and the second coil to improve the heating efficiency. When the type of cookware is the second type with low magnetic permeability, only the first coil with a larger resistance value is used to perform resistance heating on the cookware. The heating device can heat different types of cookware, improving the versatility of the heating device.

[0176] The above methods can be implemented in various different ways according to specific features and / or example applications. For example, these methods can be implemented by a combination of hardware, firmware, and / or software. For example, in a hardware implementation, a 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.

[0177] According to an embodiment of the present application, as Figure 5 shown, a control device 500 for a heating device is proposed, which is applied to the heating device in any of the above embodiments. The control device 500 for the heating device includes:

[0178] An acquisition module 502, configured to acquire heating information;

[0179] A control module 504, configured to control at least one of the first coil and the second coil to perform electromagnetic heating or control the first coil to perform resistance heating through the switch assembly according to the heating information.

[0180] In this embodiment, the heating information is the heating information of the heating device for heating the cookware through the coil assembly. According to this heating information, the heating method of the coil disk assembly for heating the cookware can be selected. The heating methods include electromagnetic heating through at least one of the first coil and the second coil in the coil assembly, and also include resistance heating of the cookware only through the first coil.

[0181] In the embodiments of the present application, a coil assembly including a first coil and a second coil with different resistance values is provided in a heating device. By controlling the energization states and driving frequencies of the first coil and the second coil, it is possible to control at least one of the first coil and the second coil to perform electromagnetic heating on the cookware, and it is also possible to control the first coil to perform resistance heating on the cookware, so that the heating assembly can perform both electromagnetic heating and resistance heating on cookware with high magnetic permeability, and can also perform resistance heating on cookware with low magnetic permeability, enabling the heating device to have a good heating effect on different types of cookware and improving the versatility of the heating device.

[0182] In some embodiments, optionally, the heating information includes a cooking stage;

[0183] The control module 504 is configured to, based on the cooking stage being the preheating stage, control the first coil to perform resistance heating through the switch assembly; or

[0184] The control module 504 is configured to, based on the cooking stage being the heating stage, control at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly.

[0185] In this embodiment, the heating information includes a cooking stage, and the cooking stage includes but is not limited to a preset stage and a heating stage. Among them, the preheating stage is a stage for uniformly preheating the cookware, with a lower requirement for the temperature rising speed of the cookware in the preset stage, and the heating stage is a stage for quickly heating the ingredients in the cookware, with a higher requirement for the temperature rising speed of the cookware in the heating stage.

[0186] In this embodiment, when it is determined that the cooking stage is the preheating stage, by controlling the on-off state of the switch assembly, the first coil with a higher resistance value is connected to the power supply circuit, and the second coil with a lower resistance value is not connected to the power supply circuit, that is, only the first coil performs resistance heating on the cookware. Since the resistance value of the first coil is greater than that of the second coil, the heating efficiency of the first coil is higher than the heating effect of the second coil under the same driving current, so the first coil with a higher resistance value is selected for resistance heating.

[0187] In this embodiment, when it is determined that the cooking stage is the heating stage, by controlling the on-off state of the switch assembly, the first coil with a higher resistance value and the second coil with a lower resistance value are both connected to the power supply circuit, that is, the first coil and the second coil perform electromagnetic heating on the cookware synchronously.

[0188] It should be noted that the heating device can obtain a heating control instruction and determine the current cooking stage based on the heating control instruction.

[0189] In the embodiments of the present application, the heating information includes the cooking stage. In different control stages, the cookware is heated by different heating methods. In the preheating stage, the requirement for the heating efficiency of the cookware is relatively low, and the requirement for heating uniformity is relatively high. Then, the cookware is resistively heated only by the first coil with a relatively large resistance value. In the heating stage, the requirement for the heating efficiency of the cookware is relatively high. Then, electromagnetic heating is performed through at least one of the first coil and the second coil to improve the heating efficiency.

[0190] In some embodiments, optionally, the heating device is used to heat the cookware, and the heating information includes the type of the cookware;

[0191] The control module 504 is configured to, based on the type of the cookware being the first type, control at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly; or

[0192] The control module 504 is configured to, based on the cooking stage being the first type, control the first coil to perform resistive heating through the switch assembly

[0193] In this embodiment, the heating information includes the type of the cookware. Different types of cookware are suitable for different heating methods. When the type of the cookware is the first type, it is selected to perform electromagnetic heating on it through the coil assembly. When the type of the cookware is the second type, it is selected to perform resistive heating on it through the coil assembly.

[0194] In this embodiment, when it is determined that the type of the cookware is the first type, by controlling the on-off state of the switch assembly, the first coil with a relatively high resistance value and the second coil with a relatively low resistance value are both connected to the power supply circuit, that is, electromagnetic heating is performed on the cookware through the first coil and the second coil synchronously.

[0195] In this embodiment, when it is determined that the type of the cookware is the second type, by controlling the on-off state of the switch assembly, the first coil with a relatively high resistance value is connected to the power supply circuit, and the second coil with a relatively low resistance value is not connected to the power supply circuit, that is, the cookware is resistively heated only by the first coil. Since the resistance value of the first coil is greater than that of the second coil, the heating efficiency of the first coil is higher than the heating effect of the second coil under the same driving current. Therefore, the first coil with a relatively high resistance value is selected for resistive heating.

[0196] In the embodiments of the present application, the heating information includes the type of the cookware. When the types of the cookware required to be heated by the heating device are different, the cookware is heated by different heating methods. When the type of the cookware is the first type with high magnetic permeability, electromagnetic heating is performed through at least one of the first coil and the second coil to improve the heating efficiency. When the type of the cookware is the second type with low magnetic permeability, the cookware is resistively heated only by the first coil with a relatively large resistance value. The heating device can heat different types of cookware, improving the versatility of the heating device.

[0197] In one embodiment of the present application, as Figure 6 shown, a control device 600 for a heating device is proposed, including: a memory 604 in which programs or instructions are stored; a processor 602 that executes the programs or instructions stored in the memory 604 to implement the steps of the control method for the heating device in any of the embodiments. Therefore, it has all the beneficial technical effects of the control method for the heating device in any of the above embodiments, and will not be elaborated here too much.

[0198] In one embodiment of the present application, a readable storage medium is proposed. Programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by a processor, the steps of the control method for the heating device in any of the above embodiments are implemented. Therefore, it has all the beneficial technical effects of the control method for the heating device in any of the above embodiments, and will not be elaborated here too much.

[0199] 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 above devices, but is not limited 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 disk (DVD), memory cards, floppy disks, encoding mechanical devices (such as punched cards or grooves with raised structures recording instructions), and any suitable combination of the above devices. The computer-readable storage medium used herein should not be construed as a signal itself, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagated through waveguides or other transmission media, or electrical signals transmitted through wires, etc.

[0200] In one embodiment of the present application, as Figure 7 shown, a cooking device 700 is proposed, including: the heating device 100 in any of the above embodiments; and / or including the control device 500 for the heating device in any of the above embodiments; and / or the readable storage medium 702 in any of the above embodiments. Therefore, it has all the beneficial technical effects of the heating device 100 in any of the above embodiments; and / or including the control device 500 for the heating device in any of the above embodiments; and / or the readable storage medium 702 in any of the above embodiments, and will not be elaborated here too much.

[0201] In some technical solutions, optionally, the cooking device 700 further includes a support plate, and the first coil and the second coil are disposed on the support plate to form a coil disk.

[0202] In some technical solutions, optionally, the cooking device 700 further includes a heat dissipation component, and the coil disk is dissipated heat through the heat dissipation component.

[0203] It should be clear that in the claims, the description and the accompanying drawings of the present application, the term "a plurality" 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. It is only for more convenient description of the present application and to make the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation, be constructed and operated in the specific orientation. Therefore, these descriptions should not be construed as limitations on the present application; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects 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 the specific circumstances of the above data.

[0204] In the claims, the description and the accompanying drawings of the present application, the description of terms such as "an embodiment", "some embodiments", "specific embodiments", etc. mean 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 claims, the description and the accompanying drawings of the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0205] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heating device, characterized in that, comprising: a coil assembly, the coil assembly includes a first coil and a second coil connected in parallel, and the resistance value of the first coil is different from the resistance value of the second coil; a power supply circuit for supplying power to the coil assembly; a switch assembly connected between the power supply circuit and the coil assembly; a control circuit connected to the control end of the switch assembly, and the control circuit is used to control at least one of the first coil and the second coil to perform electromagnetic heating through the switch assembly, or control the first coil to perform resistance heating.

2. The heating device according to claim 1, characterized in that, the resistance value of the first coil is greater than the resistance value of the second coil.

3. The heating device according to claim 1, characterized in that, the switch assembly includes: a first switch element connected between the second coil and the power supply circuit; the control circuit is specifically used to control the first switch element to be disconnected so that the first coil performs resistance heating, or control the first switch element to be turned on so that the first coil and the second coil perform electromagnetic heating synchronously.

4. The heating device according to claim 3, characterized in that, the switch assembly further includes: a second switch element connected between the first coil and the power supply circuit; the control circuit is specifically used to control the first switch element and the second switch element to be turned on so that both the first coil and the second coil perform electromagnetic heating; or the control circuit is specifically used to control the first switch element to be turned on and the second switch element to be disconnected so that the second coil performs electromagnetic heating.

5. The heating device according to any one of claims 1 to 4, characterized in that, the control circuit includes: a controller connected to the power supply circuit and the control end of the switch assembly; a first power supply connected to the controller for supplying power to the controller; a zero-crossing detection circuit connected to the controller for detecting the zero-crossing point of the voltage output by the power supply circuit.

6. The heating device according to any one of claims 1 to 4, characterized in that, the power supply circuit includes: a second power supply; a filter circuit, the first end of the filter circuit is connected to the output end of the second power supply, and the second end of the filter circuit is connected to the control circuit; a rectifier circuit, the first end of the rectifier circuit is connected to the second end of the filter circuit; an inverter switch circuit connected between the second end of the rectifier circuit and the coil assembly.

7. The heating device according to any one of claims 1 to 4, characterized in that, the number of the first coils is at least two, and / or the number of the second coils is at least two.

8. The heating device according to any one of claims 1 to 4, characterized in that, the wire harnesses of the first coil and the second coil are wound in parallel.

9. A control method for a heating device, characterized in that, applied to the heating device according to any one of claims 1 to 8, and the control method for the heating device includes: acquiring heating information; According to the heating information, at least one of the first coil and the second coil is controlled by the switch assembly to perform electromagnetic heating, or the first coil is controlled to perform resistance heating.

10. The control method of the heating device according to claim 9, wherein, the heating information includes a cooking stage; the step of, according to the heating information, controlling at least one of the first coil and the second coil by the switch assembly to perform electromagnetic heating, or controlling the first coil to perform resistance heating, includes: Based on the cooking stage being the preheating stage, controlling the first coil to perform resistance heating by the switch assembly; or Based on the cooking stage being the heating stage, controlling at least one of the first coil and the second coil by the switch assembly to perform electromagnetic heating.

11. The control method of the heating device according to claim 9, wherein, the heating device is used to heat a cooking utensil, and the heating information includes the type of the cooking utensil; the step of, according to the heating information, controlling at least one of the first coil and the second coil by the switch assembly to perform electromagnetic heating, or controlling the first coil to perform resistance heating, includes: Based on the cooking utensil type being the first type, controlling at least one of the first coil and the second coil by the switch assembly to perform electromagnetic heating; or Based on the cooking utensil type being the second type, controlling the first coil to perform resistance heating by the switch assembly.

12. A control device of a heating device, wherein, applied to the heating device according to any one of claims 1 to 8, the control device of the heating device includes: an acquisition module for acquiring heating information; a control module for controlling at least one of the first coil and the second coil by the switch assembly to perform electromagnetic heating, or controlling the first coil to perform resistance heating according to the heating information.

13. A control device of a heating device, wherein, includes: a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method according to any one of claims 9 to 11 are implemented.

14. A readable storage medium, on which a program or instruction is stored, wherein, when the program or instruction is executed by a processor, the steps of the method according to any one of claims 9 to 11 are implemented.

15. A cooking device, wherein, includes: the heating device according to any one of claims 1 to 8; the control device of the heating device according to claim 12 or 13; and / or the readable storage medium according to claim 14.

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