Induction heating device, control method thereof, and induction heating apparatus

Abstract

The application provides an induction heating device, a control method thereof and an induction heating device. The induction heating device comprises a first electric structure and a second electric structure. The first electric structure comprises a transmitting coil which is electrically connected with an alternating power source and used for generating a first alternating magnetic field. The second electric structure comprises a receiving coil and a heating coil. The transmitting coil, the receiving coil and the heating coil are coupled in pairs. The receiving coil generates an alternating voltage under the influence of the first alternating magnetic field. The heating coil is electrically connected with the receiving coil and used for receiving the alternating voltage and generating a second alternating magnetic field according to the alternating voltage, so that the first utensil generates an induction eddy current and heats. The induction heating device has high heating efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of induction heating household appliances, in particular, to an induction heating device, a control method thereof and an induction heating equipment. BACKGROUND

[0002] With the progress of social technology, the research on wireless power transmission technology develops rapidly in response to the trend of the times. Compared with the traditional contact type power transmission method used by household appliances, the wireless power transmission technology has the characteristics of flexibility, safety, and digitalization and intelligentization of power transmission process, which makes it the development direction of future household appliance power supply technology. Unlike contact type power transmission, the power transmission end and the power receiving end of wireless power supply method are in an insulating state. The non-electrically connected power transmission method makes the electric device have the following advantages: it is free from the constraints of cables, the operation table is more tidy, and the user friendliness is improved; it effectively avoids hazards such as electric shock, sparks, and wear and tear, and improves the safety of electric appliance use.

[0003] The traditional heating method uses the combustion of combustible substances for heating, but this heating method will cause environmental pollution and energy loss. Subsequently, induction heating is increasingly popular in industrial heating. Induction heating has obvious advantages compared with traditional open flame heating. Induction heating has higher heating efficiency, safety and cleanliness. In response to the development of society, induction heating has been popularized to household appliances. However, the existing induction heating appliances in the direction of thermal efficiency, the existing market does not have a product that meets the national standard technical scheme, and the technology is in its infancy, resulting in poor heating efficiency.

[0004] The above information disclosed in the background section is only used to enhance the understanding of the background of the technology described herein, therefore, the background section can contain some information which is not considered as prior art by those skilled in the art in the country. SUMMARY

[0005] The main purpose of the present application is to provide an induction heating device, a control method thereof and an induction heating equipment, to solve the problem of poor heating efficiency of induction heating appliances in the prior art.

[0006] According to an aspect of an embodiment of the present application, there is provided an induction heating device, comprising a first electrical structure and a second electrical structure, wherein the first electrical structure comprises a transmitting coil, the transmitting coil being configured to be electrically connected to an alternating current power supply and configured to generate a first alternating magnetic field; the second electrical structure comprises a receiving coil and a heating coil, the transmitting coil, the receiving coil and the heating coil are coupled in pairs, the receiving coil is affected by the first alternating magnetic field to generate an alternating voltage, the heating coil is electrically connected to the receiving coil, the heating coil is configured to receive the alternating voltage and generate a second alternating magnetic field according to the alternating voltage, so that the first appliance generates an induction eddy current and heats up.

[0007] Optionally, the second electrical structure further comprises a switching device and a first energy storage device, wherein a first end of the receiving coil is electrically connected to a first end of the heating coil through the switching device; a first end of the first energy storage device is electrically connected to the first end of the receiving coil and a first end of the switching device respectively, a second end of the first energy storage device is electrically connected to a second end of the receiving coil, and the first energy storage device is further configured to be electrically connected to a second appliance, and the first energy storage device is configured to charge in a case where the switching device is closed and supply power to the second appliance in a case where the switching device is open.

[0008] Optionally, the second electrical structure further comprises a second energy storage device and a third energy storage device, wherein the first end of the first energy storage device is electrically connected to the first end of the receiving coil through a first end of the second energy storage device; the switching device is electrically connected to the first end of the heating coil through the third energy storage device; and the first electrical structure further comprises a fourth energy storage device, and the transmitting coil is electrically connected to the alternating current power supply through the fourth energy storage device.

[0009] Optionally, the second electrical structure further comprises a rectifier device, a first end of the rectifier device is electrically connected to the first end of the first energy storage device and the switching device respectively, a second end of the rectifier device is electrically connected to the second end of the first energy storage device, the rectifier device is configured to be electrically connected to the second appliance, and the rectifier device is configured to rectify and output a voltage output by the first energy storage device to the second appliance.

[0010] Optionally, the receiving coil and the heating coil are coaxially arranged, a distance between the receiving coil and the heating coil ranges from 0 to 50 mm, and a distance between the transmitting coil and the receiving coil ranges from 0 to 50 mm.

[0011] Optionally, the transmitting coil and the receiving coil are both disc-shaped coils obtained by tightly winding a litz wire, and the heating coil is a spiral-shaped coil obtained by winding a wire.

[0012] Optionally, the induction heating device further comprises a high magnetic permeability structure, the high magnetic permeability structure is located on a side of the transmitting coil away from the receiving coil, on a side of the receiving coil away from the transmitting coil, and around the heating coil, and the high magnetic permeability structure is configured to reduce leakage magnetic flux of the first alternating magnetic field and the second alternating magnetic field.

[0013] Optionally, the first electrical appliance structure further comprises a processing circuit, the transmitting coil is electrically connected to the alternating current power supply through the processing circuit, and the processing circuit is configured to at least one of filter, rectify, and invert the alternating current output by the alternating current power supply and then send to the transmitting coil.

[0014] According to another aspect of the embodiments of the present application, a control method of the induction heating device is also provided, comprising: obtaining electrical working data of the receiving coil and / or the heating coil, the electrical working data comprising at least one of actual power, alternating voltage, and alternating current; and in the case that the electrical working data is less than a predetermined threshold, sending the electrical working data to a controller of the first electrical appliance structure, so that the controller of the first electrical appliance structure adjusts a working parameter of the transmitting coil, so that the adjusted electrical working data is greater than or equal to the predetermined threshold.

[0015] Optionally, obtaining the electrical working data of the receiving coil and / or the heating coil comprises: obtaining the electrical working data of the receiving coil and / or the heating coil at a current time; and after obtaining the electrical working data of the receiving coil and / or the heating coil, before sending the electrical working data to the controller of the first electrical appliance structure in the case that the electrical working data is less than a predetermined threshold, the method further comprises: obtaining the electrical working data at a previous time of the current time; determining whether the electrical working data at the previous time is greater than the electrical working data at the current time; and in the case that the electrical working data at the previous time is greater than the electrical working data at the current time, determining whether the electrical working data at the current time is less than the predetermined threshold.

[0016] Optionally, the working parameter comprises a working frequency and / or a duty cycle of the transmitting coil.

[0017] According to another aspect of the embodiments of the present application, there is also provided a method for controlling the induction heating device, comprising: in the case that electrical working data of the receiving coil and / or the heating coil is received, adjusting the working parameter of the transmitting coil, so that the adjusted electrical working data is greater than or equal to a predetermined threshold, wherein the electrical working data is obtained by the controller of the second electrical structure and is sent by the controller in the case that the electrical working data is less than the predetermined threshold, and the electrical working data comprises at least one of actual power, alternating voltage and alternating current.

[0018] Optionally, the adjusting the working parameter of the transmitting coil comprises: determining a difference between the electrical working data and the predetermined threshold as a target difference; obtaining corresponding relationship information, the corresponding relationship information being information representing a corresponding relationship between the difference and a historical working parameter of the transmitting coil; determining the historical working parameter corresponding to the target difference as a target parameter according to the corresponding relationship information; and adjusting the working parameter to the target parameter.

[0019] Optionally, the adjusting the working parameter of the transmitting coil comprises: a step of obtaining the current working parameter of the transmitting coil and an adjusting step length; a step of increasing and / or decreasing the current working parameter by the adjusting step length from the current working parameter; a step of determining whether the electrical working data is received; and a step of executing the step of obtaining, the step of adjusting and the step of determining at least once in sequence in the case that the electrical working data is received, until the electrical working data is no longer received.

[0020] Optionally, the step of adjusting comprises: determining a size relationship between the current electrical working data and the electrical working data received last time; determining an adjusting direction of the adjusting step length according to the size relationship, the adjusting direction being increasing or decreasing; and adjusting the current working parameter by the adjusting step length and the adjusting direction.

[0021] Optionally, the working parameter comprises a working frequency and / or a duty cycle of the transmitting coil.

[0022] According to still another aspect of the embodiments of the present application, there is also provided an induction heating device, comprising any one of the induction heating device, the first appliance, the controller of the first electrical structure and the controller of the second electrical structure, wherein the induction heating device comprises the first electrical structure and the second electrical structure; the first appliance is in contact with the heating coil of the second electrical structure or is at a distance less than or equal to a predetermined distance from the heating coil; the controller of the first electrical structure is configured to execute any one of the methods; and the controller of the second electrical structure is configured to execute any one of the methods.

[0023] In the embodiment of the present application, the inductive heating device comprises two-by-two coupled transmitting coil, receiving coil and heating coil, the transmitting coil generates a first alternating magnetic field; the receiving coil induces an alternating voltage of the first alternating magnetic field, the heating coil is electrically connected with the receiving coil, the heating coil receives the alternating voltage and generates a second alternating magnetic field according to the alternating voltage, so that the first appliance forms an induced eddy current and generates heat. The inductive heating device of the present application adopts three coils, and the three coils are two-by-two cross-coupled, which ensures that the coupling effect is high, so that the heating efficiency of the inductive heating device is high. In addition, due to the high heating efficiency of the inductive heating device of the present application, even if the first electric appliance structure and the second electric appliance structure are horizontally offset, that is, the transmitting coil and the receiving coil are offset, the heating effect of the inductive heating device is not greatly affected, and the anti-offset characteristic of the inductive heating device is high. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings accompanying the specification of the present application form a part thereof, serve to further understand the present application, and together with the specification of the present application, serve to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0025] Figure 1 A circuit principle schematic diagram of an inductive heating device according to an embodiment of the present application is shown;

[0026] Figure 2 A structure schematic diagram of an inductive heating device according to an embodiment of the present application is shown;

[0027] Figure 3 A compensation network equivalent diagram of an inductive heating device according to an embodiment of the present application is shown;

[0028] Figure 4 A coil decoupling equivalent diagram of an inductive heating device according to an embodiment of the present application is shown;

[0029] Figure 5 A design flowchart of transmitting coil inductance in an inductive heating device according to an embodiment of the present application is shown;

[0030] Figure 6 A corresponding relationship diagram between horizontal offset and coupling coefficient of transmitting coil and receiving coil of an inductive heating device according to an embodiment of the present application is shown, when the vertical distance is 35mm;

[0031] Figure 7 A corresponding relationship diagram between electric power and efficiency of an inductive heating device according to an embodiment of the present application is shown;

[0032] Figure 8 A flowchart of a control method of an inductive heating device according to an embodiment of the present application is shown;

[0033] Figure 9 A schematic diagram of a control arrangement for an inductive heating device is shown in accordance with embodiments of the present application.

[0034] Wherein the above figures include the following reference signs:

[0035] 10, first electrical structure; 20, second electrical structure; 30, alternating current power supply; 40, first appliance; 60, second appliance; 70, high magnetic permeability structure; 100, transmitting coil; 101, fourth energy storage device; 200, receiving coil; 201, heating coil; 202, switching device; 203, first energy storage device; 204, second energy storage device; 205, third energy storage device; 206, rectifying device; 400, inductance; 401, equivalent resistance. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0037] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should belong to the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] It should be understood that when an element (such as a layer, film, region, or substrate) is described as "on" another element, it can be directly on the other element, or there can be an intermediate element. Also, in the specification and claims, when an element is described as "connected to" another element, it can be "directly connected to" the other element, or "connected to" the other element through a third element.

[0040] As mentioned in the background, the heating efficiency of the induction heating appliance in the prior art is poor, in order to solve the above problems, in a typical embodiment of the present application, an induction heating device, a control method thereof and an induction heating device are provided.

[0041] According to a typical embodiment of the present application, an induction heating device is provided, as shown in Figure 1 and Figure 2 The induction heating device comprises a first appliance structure 10 and a second appliance structure 20, wherein the first appliance structure 10 comprises a transmitting coil 100, the transmitting coil 100 is electrically connected with an alternating current power supply 30, and the transmitting coil 100 is used to generate a first alternating magnetic field; the second appliance structure 20 comprises a receiving coil 200 and a heating coil 201, the transmitting coil 100, the receiving coil 200 and the heating coil 201 are coupled with each other, the receiving coil 200 generates an alternating voltage under the influence of the first alternating magnetic field, the heating coil 201 is electrically connected with the receiving coil 200, the heating coil 201 is used to receive the alternating voltage and generate a second alternating magnetic field according to the alternating voltage, so that the first appliance 40 forms an induced eddy current and generates heat.

[0042] The induction heating device comprises transmitting coils, receiving coils and heating coils coupled with each other, the transmitting coils generate a first alternating magnetic field; the receiving coils induce an alternating voltage of the first alternating magnetic field, the heating coils are electrically connected with the receiving coils, the heating coils receive the alternating voltage and generate a second alternating magnetic field according to the alternating voltage, so that the first appliance forms an induced eddy current and generates heat. The induction heating device of the present application adopts three coils, and the three coils are cross-coupled with each other, which ensures a high coupling effect and a high heating efficiency of the induction heating device. In addition, due to the high heating efficiency of the induction heating device of the present application, even if the first appliance structure and the second appliance structure are offset in the horizontal direction, that is, the transmitting coil and the receiving coil are offset, the heating effect of the induction heating device is not greatly affected, and the anti-offset characteristic of the induction heating device is high.

[0043] In addition, compared with the contact type electric energy transmission in the prior art, the induction heating device of the present application eliminates the constraint of the cable, so that the operation table of the device is neat, the user experience is good, and the hazards such as electric leakage, spark and wear of the cable can be effectively avoided, and the safety of the heating device is good.

[0044] It should be noted that the relative position of the receiving coil and the heating coil remains unchanged, and the relative position relationship between the receiving coil and the transmitting coil can be changed.

[0045] Specifically, as shown inFigure 1 as well as Figure 2 As shown, the first device 40 is equivalent to an inductor 400 and an equivalent resistor 401 connected in series. The first device 40 is located in the magnetic field generated by the heating coil 201 and induces a high-frequency alternating voltage of the same frequency, which generates eddy currents inside the first device 40. These eddy currents cause the first device to heat up, thereby heating the food or other items inside the first device.

[0046] The above-mentioned induction heating process of this application utilizes coil cross-coupling to realize a compensation network and coil configuration for wireless induction heating: there is mutual coupling between the heating coil and the transmitting coil and the receiving coil, which can realize induction heating while also acting as the compensation inductor of the compensation network.

[0047] According to a specific embodiment of this application, such as Figure 1 As shown, the second electrical structure 20 further includes a switching device 202 and a first energy storage device 203. The first end of the receiving coil 200 is electrically connected to the first end of the heating coil 201 through the switching device 202. The first end of the first energy storage device 203 is electrically connected to the first end of the receiving coil 200 and the first end of the switching device 202, respectively. The second end of the first energy storage device 203 is electrically connected to the second end of the receiving coil 200. The first energy storage device 203 is also used to be electrically connected to the second appliance 60. The first energy storage device 203 is used to charge when the switching device 202 is closed and to supply power to the second appliance 60 when the switching device 202 is open. In this embodiment, by controlling the aforementioned switching device and the aforementioned first energy storage device, the switching between the heating function and the power supply function of the induction heating device can be realized. When the switching device is closed, the three coils are coupled in pairs to realize the induction heating of the first appliance, while the first energy storage device stores and receives the electrical energy converted by the coils. When the switching device is open, the coupling of the three coils disappears, and the first energy storage device begins to discharge to supply power to the second appliance. This realizes the simultaneous transfer of electrothermal energy of the induction heating device, ensuring the functional diversity of the induction heating device and further ensuring a better user experience.

[0048] According to another specific embodiment of this application, such as Figure 1As shown, the second electric appliance structure 20 further comprises a second energy storage device 204 and a third energy storage device 205, a first end of the first energy storage device 203 is electrically connected with a first end of the receiving coil 200 through a first end of the second energy storage device 204; the switch device 202 is electrically connected with a first end of the heating coil 201 through the third energy storage device 205; the first electric appliance structure 10 further comprises a fourth energy storage device 101, and the transmitting coil 100 is electrically connected with the AC power supply 30 through the fourth energy storage device 101. The second energy storage device serves as an electric energy compensation network of the receiving coil, the third energy storage device serves as an electric energy compensation network of the heating coil, and the fourth energy storage device serves as an electric energy compensation network of the transmitting coil. The receiving coil is located in a magnetic field excited by the transmitting coil and induces a high-frequency alternating voltage of the same frequency. The high-frequency alternating voltage is transmitted to the heating coil through the compensation network, and the high-frequency alternating voltage of the heating coil forms a high-frequency alternating magnetic field, which generates eddy current in the interior of the first appliance to be heated. The eddy current makes the pot heat up, thereby realizing wireless power supply and induction heating.

[0049] In actual application, those skilled in the art can flexibly select any suitable device in the prior art as the switch device, the first energy storage device, the second energy storage device, the third energy storage device and the fourth energy storage device according to actual conditions. Specifically, the first energy storage device, the second energy storage device, the third energy storage device and the fourth energy storage device comprise a capacitor and / or a resistor, and the switch device comprises a relay. In a more specific embodiment, the first energy storage device, the second energy storage device, the third energy storage device and the fourth energy storage device are all capacitors, and the switch device is a relay. The relay is used to control the electrical connection state between the receiving coil and the heating coil, thereby controlling the working state of the induction heating. If the relay is open, there is no electrical connection between the receiving coil and the heating coil, and the induction heating does not work. If the relay is closed, there is electrical connection between the receiving coil and the heating coil, and the induction heating works normally.

[0050] In order to further ensure the power supply safety of the induction heating device, in another specific embodiment of the present application, the switch device is a relay, and the first energy storage device, the second energy storage device, the third energy storage device and the fourth energy storage device are all capacitors. Figure 1As shown, the second appliance structure further comprises a rectifier 206, a first end of the rectifier 206 is electrically connected with a first end of the first energy storage device 203 and the switch device 202 respectively, a second end of the rectifier 206 is electrically connected with a second end of the first energy storage device 203, the rectifier 206 is used to be electrically connected with the second appliance, and the rectifier is used to rectify the voltage output by the first energy storage device and output to the second appliance. By rectifying the voltage output by the first energy storage device through the rectifier, the alternating current is converted into direct current, which ensures that the second appliance can be provided with the required voltage and the voltage provided to the second appliance is relatively stable, further avoiding damage to the second machine.

[0051] In actual application, the rectifier comprises a rectifier diode. Figure 1 As shown, the second appliance 60 can be equivalent to a direct current resistance, which is a pure electric power load, which can be externally connected or internally built. The electric power can be used to power the control circuit of the receiving side circuit part, and can also be used for other purposes, for example, the power can be used to heat the water droplets on the cover of the first appliance to become water vapor and be discharged from the heated first appliance.

[0052] In another specific embodiment of the present application, as shown in Figure 2 As shown, the receiving coil 200 is coaxially arranged with the heating coil 201, the distance between the receiving coil 200 and the heating coil 201 is 0-50mm, and the distance between the transmitting coil 100 and the receiving coil 200 is 0-50mm.

[0053] In order to further ensure that the induction heater has high heating efficiency and good heating effect, specifically, the transmitting coil, the receiving coil and the heating coil are arranged in sequence along the direction close to the first appliance, the distance between the receiving coil and the transmitting coil is set to 35mm, and the distance between the heating coil and the receiving coil is set to 0. The receiving coil and the heating coil can be horizontally movable relative to the position of the transmitting coil, and the movement range can also be adjusted according to actual needs.

[0054] According to another specific embodiment of the present application, as shown in Figure 2 As shown, the transmitting coil and the receiving coil are both disc-shaped coils obtained by tightly winding the litz wire, and the heating coil is a spiral-shaped coil obtained by winding the wire. The radius of the heating coil increases along a predetermined direction, and the predetermined direction is away from the receiving coil. Specifically, the radius of the heating coil increases with the increase of the first appliance to be heated.

[0055] In addition, in order to further solve the problem of low heating efficiency of the induction heating appliance in the prior art, in an embodiment, as shown in Figure 2 The induction heating device further comprises a high magnetic permeability structure 70, which is located at the side of the transmitting coil 100 away from the receiving coil 200, at the side of the receiving coil 200 away from the transmitting coil 100, and around the heating coil 201. The high magnetic permeability structure 70 is used to reduce the leakage magnetic flux of the first alternating magnetic field and the second alternating magnetic field. Through the high magnetic permeability structure, the leakage magnetic flux is further reduced, and the coupling effect between the three coils is further ensured to be good, thereby further ensuring that the induction heating appliance has high heating efficiency.

[0056] Specifically, the magnetic permeability structure comprises a non-metallic material with high magnetic permeability, and the non-metallic material with high magnetic permeability can be manganese-zinc ferrite PC40.

[0057] According to another specific embodiment of the present application, the first appliance structure further comprises a processing circuit, and the transmitting coil is electrically connected to the alternating current power supply through the processing circuit. The processing circuit is used to at least one of filter, rectify, and invert the alternating current output by the alternating current power supply, and then send it to the transmitting coil. Through the processing circuit, the alternating current output by the alternating current power supply is processed by filtering, rectifying, inverting, etc. The signal quality of the high-frequency voltage reaching the transmitting coil is further ensured to be good, so that the transmitting coil can excite a strong high-frequency first alternating magnetic field according to the high-frequency voltage.

[0058] The compensation network structure of the first appliance structure and the second appliance structure is as shown in Figure 3 The equivalent circuit diagram obtained by decoupling the three coils in the figure is as shown in Figure 4 The reference direction of the current has been marked in Figure 3 and Figure 4 The reference direction of the three mesh currents is clockwise, M 12 is the mutual inductance between the transmitting coil and the receiving coil, M 23 is the mutual inductance between the receiving coil and the heating coil, C1 is the capacitance of the fourth energy storage device, C2 is the capacitance of the second energy storage device, C3 is the capacitance of the third energy storage device, C4 is the capacitance of the first energy storage device, L1 is the inductance of the transmitting coil, L2 is the inductance of the receiving coil, L3 is the inductance of the heating coil, R e is the internal resistance of the heating coil and the equivalent resistance of the first appliance, P is the heating power of the induction heating device, and U1 is the voltage provided by the alternating current power supply. The equation can be written as:

[0059]

[0060]

[0061]

[0062] According to three resonance conditions:

[0063]

[0064]

[0065]

[0066]

[0067]

[0068]

[0069]

[0070] According to formula (10), it can be seen that when the second electric appliance structure deviates from the first electric appliance structure, the mutual inductance M between the transmitting coil and the receiving coil 12 decreases, while other parameters remain unchanged, the heating power P increases, and the anti-deviation characteristic of the inductive heating device is greatly improved.

[0071] In a specific embodiment, the parameter design process of each device in the above inductive heating device is as follows:

[0072] First, the inductance L1 of the transmitting coil is determined, and then the capacitance value of the first energy storage device in parallel with the receiving coil is obtained according to the required power and the inductance L3 of the heating coil, and the inductance L2 of the receiving coil is calculated. Finally, the capacitance C1 of the fourth energy storage device in series with the transmitting coil, the capacitance C2 of the second energy storage device in series with the receiving coil, and the capacitance C3 of the third energy storage device as the compensation capacitor of the heating coil are obtained according to the resonance relationship of the compensation network. The number of turns of the transmitting coil and the receiving coil can be determined by the determined inductance and the single-turn inductance simulated by ANSYS software. The specific parameter determination process is as follows:

[0073] The inductance design process of the transmitting coil is as follows:

[0074] Figure 5The design flow chart of the transmitting coil inductance is as follows: firstly, according to the size requirement, the simulation model of the transmitting coil is established in Maxwell (electromagnetic simulation software) and simulation is carried out, the coil size with larger coupling coefficient, smaller coupling coefficient after offset and smaller coil inductance change is selected, the single-turn inductance L0 is determined, secondly, according to the required power, the wire diameter meeting the overcurrent capacity is selected, the required coil turns N is calculated according to the coil size and the wire diameter of the coil, and finally the inductance L1 of the transmitting coil is calculated according to the inductance of the general electromagnetic oven coil by the formula L=N2L0.

[0075] The relationship between the coupling coefficients of the transmitting coil and the receiving coil under different horizontal offsets is shown in Figure 6 According to Figure 6 It can be known that when the vertical distance between the transmitting coil and the receiving coil is fixed at 35 mm, the receiving coil and the heating coil (the relative position of the receiving coil and the heating coil is always kept unchanged and they are horizontally offset together) are horizontally offset from 0 mm to 40 mm, it can be seen that the coupling coefficients of the transmitting coil and the receiving coil change little and are relatively high.

[0076] The design process of other parameters is as follows:

[0077] When the parameters of the transmitting coil are determined, the parameters of the receiving coil are further determined according to the power demand of the system. According to the formula (10), when the inductance of the receiving coil changes, M 12 and M 23 will change, thereby affecting the heating power of the system. The design system reaches the heating power of 1300 W under the conditions of the position opposite and the input direct current voltage of the inverter 400 V. The parameters of the receiving coil are derived as follows:

[0078] The equivalent diagram of the compensation network of the system is shown in Figure 3 . Given the heating power P and the measured R e , the heating current I3 can be calculated according to the formula

[0079]

[0080] According to the design scheme, the voltage across the first energy storage device is the input voltage of the secondary side electric power, and when the full power 1300 W is heated, the voltage U across the first energy storage device reaches 130 V, and the resonance frequency of the system is 30 kHz. According to Kirchhoff's voltage law, the following relationship can be listed:

[0081]

[0082] At resonance:

[0083]

[0084] Therefore, the relationship can be:

[0085]

[0086] k1 and k2 are coupling coefficients, which are simulated in ansys. The inductance of the receiving coil can be calculated from equations (15), (16), and (17). After knowing the capacitance C4 of the first energy storage device, the inductance L1 of the transmitting coil, and the inductance L2 of the receiving coil, the resonance condition is:

[0087]

[0088]

[0089]

[0090] The capacitance C4 of the first energy storage device can be calculated according to equations (17) and (20), and the inductance of the receiving coil can be calculated according to equation (10), and the relationship is as follows:

[0091]

[0092]

[0093]

[0094] The capacitances of C1, C2, and C3 can be calculated. The designed parameters are shown in Table 1. The above induction heating device of the present application can be designed by using the following parameters, so that the heating efficiency is greater than 90%.

[0095] Table 1 compensation element parameter design

[0096] Compensation element Parameter Transmit coil 170 uH Receive coil 214 uH a capacitance value C2 of the second energy storage device 152 nF a capacitance value C3 of the third energy storage device 466 nF a capacitance value C4 of the first energy storage device 980 nF Capacitance of the fourth energy storage device C1 168 nF

[0097] Figure 7 The power-efficiency curve diagram of the system receiving end from 20W to 100W, from the primary side of the inverter input to the secondary side of the DC output, when the electric power is 20W, the efficiency is more than 80%, when the electric power is from 20W to 100W, the efficiency gradually increases, when the electric power is 100W, the efficiency is more than 85%. At the same time, the system heating power is more than 90% when the power is 1300W, and the system has high electric-thermal energy conversion efficiency.

[0098] According to the embodiment of the present application, a control method of the above-mentioned induction heating device is also provided, which can be applied to the controller of the second electric appliance structure. Figure 8 is a flow chart of the control method of the above-mentioned induction heating device according to the embodiment of the present application. As shown in Figure 8 , the method comprises the following steps:

[0099] In step S101, electrical working data of the receiving coil and / or the heating coil is acquired, the electrical working data including at least one of actual power, alternating voltage and alternating current;

[0100] In step S102, in a case where the electrical working data is less than a predetermined threshold, the electrical working data is sent to a controller of the first electrical structure, so that the controller of the first electrical structure adjusts a working parameter of the transmitting coil, so that the adjusted electrical working data is greater than or equal to the predetermined threshold.

[0101] In the control method of the induction heating device, first, electrical working data of the receiving coil and / or the heating coil, such as actual power, alternating voltage and alternating current, is acquired; then, in a case where the electrical working data is less than a predetermined threshold, the electrical working data is sent to a controller of the first electrical structure, so that the controller of the first electrical structure adjusts a working parameter of the transmitting coil, so that the adjusted electrical working data is greater than or equal to the predetermined threshold. The method of the present application monitors the electrical working data of the second electrical structure, and when the electrical working data is less than the predetermined threshold due to horizontal offset between the second electrical structure and the first electrical structure, etc., the working parameter of the transmitting coil is adjusted to compensate for the electrical working data of the receiving coil and / or the heating coil in the second electrical structure, achieving the effect of offset resistance, ensuring good heating effect of the induction heating device, and further ensuring good user experience.

[0102] Specifically, the actual power of the receiving coil can be acquired, and the working parameter of the transmitting coil is adjusted according to the size of the actual power, to alleviate the problem of poor coupling effect and poor heating effect caused by the offset between the first electrical structure and the second electrical structure.

[0103] In a specific embodiment, acquiring electrical working data of a receiving coil and / or a heating coil includes: acquiring the electrical working data of the receiving coil and / or the heating coil at a current time; after acquiring the electrical working data of the receiving coil and / or the heating coil, before sending the electrical working data to a controller of a first electrical structure in a case where the electrical working data is less than a predetermined threshold, the method further includes: acquiring the electrical working data at a previous time of the current time; determining whether the electrical working data at the previous time is greater than the electrical working data at the current time; in a case where the electrical working data at the previous time is greater than the electrical working data at the current time, determining whether the electrical working data at the current time is less than the predetermined threshold. In this embodiment, only in a case where the electrical working data decreases and is less than the predetermined threshold, the electrical working data is sent, which avoids the problem of false triggering adjustment.

[0104] In another specific embodiment of the present application, the operating parameter of the transmitting coil includes an operating frequency and / or a duty cycle of the transmitting coil.

[0105] According to another typical embodiment of the present application, a control method of the induction heating device is also provided, which can be applied to the controller of the first electrical structure. The method includes the following steps:

[0106] In step S201, when the electrical operating data of the receiving coil and / or the heating coil is received, the operating parameter of the transmitting coil is adjusted so that the adjusted electrical operating data is greater than or equal to the predetermined threshold, wherein the electrical operating data is obtained by the controller of the second electrical structure and is sent when it is less than the predetermined threshold, and the electrical operating data includes at least one of the actual power, the alternating voltage and the alternating current.

[0107] In the control method of the induction heating device, when the electrical operating data of the receiving coil and / or the heating coil, which is obtained by the controller of the second electrical structure and is sent, is less than the predetermined threshold, the operating parameter of the transmitting coil is adjusted so that the adjusted electrical operating data is greater than or equal to the predetermined threshold. In the method of the present application, when the electrical operating data is less than the predetermined threshold due to the horizontal offset between the second electrical structure and the first electrical structure, etc., the electrical operating data is received, and the operating parameter of the transmitting coil is adjusted to compensate for the electrical operating data of the receiving coil and / or the heating coil in the second electrical structure, so as to achieve the anti-offset effect, ensure the good heating effect of the induction heating device, and further ensure the good user experience.

[0108] In order to further simply and quickly adjust the operating parameter of the transmitting coil, and further quickly make the adjusted induction heating device have a good heating effect, according to a specific embodiment of the present application, the adjustment of the operating parameter of the transmitting coil includes: determining the difference between the electrical operating data and the predetermined threshold as a target difference; obtaining corresponding relationship information, which is information representing the corresponding relationship between the difference and the historical operating parameter of the transmitting coil; determining the historical operating parameter corresponding to the target difference as a target parameter according to the corresponding relationship information; and adjusting the operating parameter to the target parameter.

[0109] The method for adjusting the working parameter of the transmitting coil is not limited to the method described above. According to another specific embodiment of the present application, the method for adjusting the working parameter of the transmitting coil comprises: a step of acquiring the current working parameter of the transmitting coil and an adjustment step size; a step of increasing and / or decreasing the current working parameter by the adjustment step size from the current working parameter; a step of determining whether the electrical working data is received; and a step of, in the case that the electrical working data is received, sequentially executing the step of acquiring, the step of adjusting, and the step of determining at least once until the electrical working data is no longer received. Through the above-mentioned cyclic adjustment process, the dynamic adjustment of the heating effect of the induction heating device is further realized, and the anti-deviation characteristics of the device are further ensured to be good.

[0110] In order to further ensure that the adjustment efficiency is high and the adjustment effect is good, in a specific embodiment, the step of adjusting comprises: determining the size relationship between the current electrical working data and the electrical working data received last time; determining the adjustment direction of the adjustment step size according to the size relationship, the adjustment direction being increasing or decreasing; and adjusting the current working parameter by the adjustment step size and the adjustment direction.

[0111] In a specific embodiment, the working parameter comprises the working frequency and / or the duty cycle of the transmitting coil.

[0112] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0113] The present application also provides a control device for the above-mentioned induction heating device. It should be noted that the control device for the above-mentioned induction heating device of the present application can be used to execute the control method for the above-mentioned induction heating device provided by the present application. The control device for the above-mentioned induction heating device provided by the present application is described below.

[0114] Figure 9 is a schematic diagram of the control device for the above-mentioned induction heating device according to the present application. As shown in FIG. 1, the control device for the above-mentioned induction heating device according to the present application comprises a processor 10 and a memory 20. Figure 9As shown, the device comprises a first acquisition unit 80 and a sending unit 90, wherein the first acquisition unit 80 is configured to acquire electrical working data of the receiving coil and / or the heating coil, and the electrical working data comprises at least one of the actual power, the alternating voltage and the alternating current; and the sending unit 90 is configured to send the electrical working data to the controller of the first appliance structure when the electrical working data is less than a predetermined threshold, so that the controller of the first appliance structure adjusts the working parameters of the transmitting coil to make the adjusted electrical working data greater than or equal to the predetermined threshold.

[0115] The control device of the induction heating device acquires the electrical working data of the receiving coil and / or the heating coil through the first acquisition unit, and sends the electrical working data to the controller of the first appliance structure when the electrical working data is less than a predetermined threshold, so that the controller of the first appliance structure adjusts the working parameters of the transmitting coil to make the adjusted electrical working data greater than or equal to the predetermined threshold. The device of the present application monitors the electrical working data of the second appliance structure, and when the electrical working data is less than a predetermined threshold due to the horizontal offset between the second appliance structure and the first appliance structure, the working parameters of the transmitting coil are adjusted to compensate for the electrical working data of the receiving coil and / or the heating coil in the second appliance structure, so as to achieve the effect of offset resistance, ensure the heating effect of the induction heating device, and further ensure the user's experience.

[0116] Specifically, the actual power of the receiving coil can be acquired, and the working parameters of the transmitting coil are adjusted according to the size of the actual power, so as to alleviate the problem of poor coupling effect and poor heating effect caused by the offset between the first appliance structure and the second appliance structure.

[0117] In a specific embodiment, the first obtaining unit comprises a first obtaining module, which is configured to obtain the electrical working data of the receiving coil and / or the heating coil at the current time. The device further comprises a second obtaining unit, a first determining unit and a second determining unit. The first obtaining unit is configured to, after obtaining the electrical working data of the receiving coil and / or the heating coil, obtain the electrical working data at a previous time of the current time before sending the electrical working data to the controller of the first electrical structure if the electrical working data is less than a predetermined threshold. The first determining unit is configured to determine whether the electrical working data at the previous time is greater than the electrical working data at the current time. The second determining unit is configured to determine whether the electrical working data at the current time is less than the predetermined threshold if the electrical working data at the previous time is greater than the electrical working data at the current time. In this embodiment, the electrical working data is sent only when it decreases and is less than the predetermined threshold, thereby avoiding false triggering of adjustment.

[0118] In another specific embodiment of the present application, the working parameter comprises a working frequency and / or a duty cycle of the transmitting coil.

[0119] According to another typical embodiment of the present application, a control device of the induction heating device is also provided, which can be applied to the controller of the first electrical structure. The device comprises an adjusting unit configured to, when receiving the electrical working data of the receiving coil and / or the heating coil, adjust the working parameter of the transmitting coil so that the adjusted electrical working data is greater than or equal to the predetermined threshold, wherein the electrical working data is obtained by the controller of the second electrical structure and sent by the controller of the second electrical structure if the electrical working data is less than the predetermined threshold, and the electrical working data comprises at least one of the actual power, the alternating voltage and the alternating current.

[0120] The control device of the induction heating device adjusts the working parameter of the transmitting coil by the adjusting unit so that the adjusted electrical working data is greater than or equal to the predetermined threshold when receiving the electrical working data of the receiving coil and / or the heating coil, which is obtained by the controller of the second electrical structure and sent by the controller of the second electrical structure if the electrical working data is less than the predetermined threshold. The device of the present application compensates the electrical working data of the receiving coil and / or the heating coil in the second electrical structure by receiving the electrical working data and adjusting the working parameter of the transmitting coil when the electrical working data is less than the predetermined threshold due to the horizontal offset between the second electrical structure and the first electrical structure, thereby achieving the effect of anti-offset, ensuring good heating effect of the induction heating device and further ensuring good user experience.

[0121] To further simply and quickly realize the adjustment of the working parameter of the transmitting coil, and to make the heating effect of the adjusted induction heating device better as soon as possible, according to one specific embodiment of the present application, the adjustment unit includes a first determination module, a second acquisition module, a second determination module, and a first adjustment module, wherein the first determination module is configured to determine a difference between the electrical working data and the predetermined threshold value as a target difference; the second acquisition module is configured to acquire corresponding relationship information, the corresponding relationship information being information representing the corresponding relationship between the difference and the historical working parameter of the transmitting coil; the second determination module is configured to determine, according to the corresponding relationship information, that the historical working parameter corresponding to the target difference is a target parameter; and the first adjustment module is configured to adjust the working parameter to the target parameter.

[0122] The method for adjusting the working parameter of the transmitting coil is not limited to the above method, and according to another specific embodiment of the present application, the adjustment unit includes a third acquisition module, a second adjustment module, a third determination module, and a loop module, wherein the third acquisition module is configured to acquire the current working parameter of the transmitting coil and an adjustment step; the second adjustment module is configured to increase and / or decrease the current working parameter by the adjustment step from the current working parameter; the third determination module is configured to determine whether the electrical working data is received; and the loop module is configured to execute the acquisition step, the adjustment step, and the determination step at least once in sequence until the electrical working data is no longer received, in the case that the electrical working data is received. Through the above loop adjustment process, the dynamic adjustment of the heating effect of the induction heating device is further realized, and the anti-deviation characteristic of the device is further ensured to be good.

[0123] To further ensure that the adjustment efficiency is high and the adjustment effect is good, in one specific embodiment, the second adjustment module includes a first determination submodule, a second determination submodule, and an adjustment submodule, wherein the first determination submodule is configured to determine the size relationship between the current electrical working data and the electrical working data received last time; the second determination submodule is configured to determine the adjustment direction of the adjustment step according to the size relationship, the adjustment direction being increase or decrease; and the adjustment submodule is configured to adjust the current working parameter by the adjustment step and the adjustment direction.

[0124] In one specific embodiment, the working parameter includes the working frequency and / or the duty cycle of the transmitting coil.

[0125] The control device of the inductive heating device includes a processor and a memory, and the first acquisition unit, the sending unit, and the adjusting unit are stored in the memory as program units, and the corresponding functions are realized by the processor executing the program units stored in the memory.

[0126] The processor includes a core, and the core calls the corresponding program units in the memory.

[0127] The memory can include a non-permanent memory in a computer readable medium, a random access memory (RAM), and / or a non-volatile memory such as a read-only memory (ROM) or a flash memory (flash RAM), and the memory includes at least one memory chip.

[0128] The embodiment of the present application provides a computer readable storage medium, and a program is stored in the computer readable storage medium.

[0129] The embodiment of the present application provides a processor, and the processor is used for running a program, and the program performs the control method of the inductive heating device when the program is running.

[0130] The embodiment of the present application provides a device, and the device includes a processor, a memory, and a program stored in the memory and capable of running on the processor, and the processor performs at least the following steps when the program is executed:

[0131] In step S101, electrical working data of the receiving coil and / or the heating coil is acquired, and the electrical working data includes at least one of actual power, alternating voltage, and alternating current.

[0132] In step S102, when the electrical working data is less than a predetermined threshold, the electrical working data is sent to a controller of the first electric appliance structure, so that the controller of the first electric appliance structure adjusts the working parameter of the transmitting coil, so that the adjusted electrical working data is greater than or equal to the predetermined threshold.

[0133] Or the program is executed to realize at least the following steps:

[0134] In step S201, when the electrical working data of the receiving coil and / or the heating coil is received, the working parameter of the transmitting coil is adjusted, so that the adjusted electrical working data is greater than or equal to a predetermined threshold, wherein the electrical working data is acquired by the controller of the second electric appliance structure and is sent when the electrical working data is less than the predetermined threshold, and the electrical working data includes at least one of actual power, alternating voltage, and alternating current.

[0135] The device herein can be a server, a PC, a PAD, a mobile phone, etc.

[0136] The present application also provides a computer program product adapted to execute a program initializing at least the following method steps when executed on a data processing device:

[0137] Step S101, obtaining electrical working data of the receiving coil and / or the heating coil, the electrical working data comprising at least one of actual power, alternating voltage and alternating current;

[0138] Step S102, in case that the electrical working data is less than a predetermined threshold, sending the electrical working data to the controller of the first appliance structure, so that the controller of the first appliance structure adjusts the working parameter of the transmitting coil, so that the adjusted electrical working data is greater than or equal to the predetermined threshold,

[0139] or adapted to execute a program initializing at least the following method steps:

[0140] Step S201, in case that electrical working data of the receiving coil and / or the heating coil is received, adjusting the working parameter of the transmitting coil, so that the adjusted electrical working data is greater than or equal to a predetermined threshold, wherein the electrical working data is obtained by the controller of the second appliance structure and sent by the controller of the second appliance structure in case that the electrical working data is less than the predetermined threshold, the electrical working data comprising at least one of actual power, alternating voltage and alternating current.

[0141] According to another typical embodiment of the present application, an inductive heating device is also provided, comprising any of the above inductive heating apparatus, the first appliance, the controller of the first appliance structure and the controller of the second appliance structure, wherein the inductive heating apparatus comprises the first appliance structure and the second appliance structure; the first appliance is in contact with the heating coil of the second appliance structure or the distance between the first appliance and the heating coil is less than or equal to a predetermined distance; the controller of the first appliance structure is adapted to execute any of the above methods applied to itself; the controller of the second appliance structure is adapted to execute any of the above methods applied to itself.

[0142] The induction heating device includes the induction heating device, the first appliance, the controller of the first electrical structure and the controller of the second electrical structure, the induction heating device adopts three coils, and the three coils are cross-coupled, so that the coupling effect is high, the heating efficiency of the induction heating device is high, and the heating efficiency of the induction heating device is high. In addition, due to the high heating efficiency of the induction heating device of the present application, even if the first electrical structure and the second electrical structure are horizontally offset, that is, the transmitting coil and the receiving coil are offset, the heating effect of the induction heating device is not greatly affected, and the anti-offset characteristic of the whole induction heating device is high. In addition, when the electrical working data is less than the predetermined threshold value due to the horizontal offset between the second electrical structure and the first electrical structure, the electrical working data of the receiving coil and / or the heating coil in the second electrical structure is compensated by adjusting the working parameters of the transmitting coil, the anti-offset effect is achieved, the heating effect of the induction heating device is good, and the user's experience is good.

[0143] Specifically, the induction heating device can be an electric rice cooker, and can also be other electrical appliances for heating in the prior art. The induction heating device can further include a second appliance.

[0144] In the above embodiments of the present application, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0145] In the several embodiments provided by the present application, it should be understood that the disclosed technology can be implemented in other ways. Of course, the unit embodiment described above is only illustrative, and for example, the division of the units can be a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, unit or module, and can be electrical or other forms.

[0146] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0147] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0148] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application, essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0149] From the above description, it can be seen that the embodiments of the present application achieve the following technical effects:

[0150] 1) The induction heating device described above includes two coupled transmitting coils, receiving coils and heating coils, the transmitting coil generates a first alternating magnetic field; the receiving coil induces an alternating voltage of the first alternating magnetic field, the heating coil is electrically connected to the receiving coil, the heating coil receives the alternating voltage and generates a second alternating magnetic field according to the alternating voltage, so that the first appliance forms an induced eddy current and heats up. The induction heating device described above adopts three coils, and the three coils are coupled with each other, which ensures a high coupling effect and a high heating efficiency of the induction heating device. In addition, due to the high heating efficiency of the induction heating device, even if the first electric appliance structure and the second electric appliance structure are horizontally offset, that is, the transmitting coil and the receiving coil are offset, the heating effect of the induction heating device is not greatly affected, and the anti-offset characteristic of the induction heating device is high.

[0151] 2) In the control method of the induction heating device described above, first, the actual power, alternating voltage, alternating current and other electrical working data of the receiving coil and / or the heating coil are obtained; then, in the case where the electrical working data is less than a predetermined threshold, the electrical working data is sent to the controller of the first electrical structure, so that the controller of the first electrical structure adjusts the working parameters of the transmitting coil, so that the adjusted electrical working data is greater than or equal to the predetermined threshold. The above method of the present application monitors the electrical working data of the second electrical structure. When the electrical working data is less than the predetermined threshold due to the horizontal offset between the second electrical structure and the first electrical structure, etc., the working parameters of the transmitting coil are adjusted to compensate for the electrical working data of the receiving coil and / or the heating coil in the second electrical structure, achieving the effect of offset resistance, ensuring that the induction heating device has good heating effect, and further ensuring that the user has a good use experience.

[0152] 3) In the control method of the induction heating device described above, in the case where the controller of the second electrical structure obtains and sends the electrical working data of the receiving coil and / or the heating coil which is less than the predetermined threshold, the working parameters of the transmitting coil are adjusted so that the adjusted electrical working data is greater than or equal to the predetermined threshold. The above method of the present application receives the electrical working data when the electrical working data is less than the predetermined threshold due to the horizontal offset between the second electrical structure and the first electrical structure, etc., and adjusts the working parameters of the transmitting coil to compensate for the electrical working data of the receiving coil and / or the heating coil in the second electrical structure, achieving the effect of offset resistance, ensuring that the induction heating device has good heating effect, and further ensuring that the user has a good use experience.

[0153] 4) The control device of the induction heating device described above obtains the actual power, alternating voltage, alternating current and other electrical working data of the receiving coil and / or the heating coil through the first obtaining unit; in the case where the electrical working data is less than a predetermined threshold, the electrical working data is sent to the controller of the first electrical structure through the sending unit, so that the controller of the first electrical structure adjusts the working parameters of the transmitting coil, so that the adjusted electrical working data is greater than or equal to the predetermined threshold. The above device of the present application monitors the electrical working data of the second electrical structure. When the electrical working data is less than the predetermined threshold due to the horizontal offset between the second electrical structure and the first electrical structure, etc., the working parameters of the transmitting coil are adjusted to compensate for the electrical working data of the receiving coil and / or the heating coil in the second electrical structure, achieving the effect of offset resistance, ensuring that the induction heating device has good heating effect, and further ensuring that the user has a good use experience.

[0154] 5) The control device for the induction heating device described above in this application, upon receiving electrical operating data from the controller of the second electrical structure, which is less than a predetermined threshold for the receiving coil and / or heating coil, adjusts the operating parameters of the transmitting coil through the adjustment unit to ensure that the adjusted electrical operating data is greater than or equal to the predetermined threshold. When the electrical operating data is less than the predetermined threshold due to horizontal offset between the second and first electrical structures, the device in this application receives the electrical operating data and adjusts the operating parameters of the transmitting coil to compensate for the electrical operating data of the receiving coil and / or heating coil in the second electrical structure. This achieves an anti-offset effect, ensuring better heating performance of the induction heating device and thus a better user experience.

[0155] 6) The induction heating device described in this application includes the aforementioned induction heating device, a first appliance, a controller for the first electrical structure, and a controller for the second electrical structure. The induction heating device employs three coils, which are cross-coupled in pairs. This ensures a high coupling effect, resulting in high heating efficiency of the induction heating device and thus ensuring high heating efficiency of the induction heating device. Furthermore, due to the high heating efficiency of the induction heating device, even if there is a horizontal offset between the first and second electrical structures (i.e., an offset between the transmitting and receiving coils), the heating effect of the induction heating device is not significantly affected, ensuring high anti-offset characteristics of the entire induction heating device. Additionally, when the electrical operating data falls below a predetermined threshold due to horizontal offset between the second and first electrical structures, the two controllers adjust the operating parameters of the transmitting coil to compensate for the electrical operating data of the receiving coil and / or heating coil in the second electrical structure, achieving an anti-offset effect and ensuring good heating performance of the induction heating device, thereby ensuring a better user experience.

[0156] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method of an inductive heating device, characterized by, The inductive heating device comprises: a first electrical structure comprising a transmitting coil, the transmitting coil being electrically connected with an alternating current power supply, and the transmitting coil being used to generate a first alternating magnetic field; and a second electrical structure comprising a receiving coil and a heating coil, the transmitting coil, the receiving coil and the heating coil being coupled two by two, the receiving coil being affected by the first alternating magnetic field to generate an alternating voltage, the heating coil being electrically connected with the receiving coil, the heating coil being used to receive the alternating voltage and generate a second alternating magnetic field according to the alternating voltage, so that the first appliance forms an inductive eddy current and generates heat, and the method comprises: In the case that the electrical working data of the receiving coil and / or the heating coil is received, the working parameter of the transmitting coil is adjusted, so that the adjusted electrical working data is greater than or equal to a predetermined threshold, wherein the electrical working data is obtained by a controller of the second electrical structure and is sent by the controller in the case that the electrical working data is less than the predetermined threshold, and the electrical working data comprises at least one of actual power, alternating voltage and alternating current, The working parameter of the transmitting coil is adjusted, comprising: a step of obtaining the current working parameter of the transmitting coil and an adjustment step size; a step of increasing and / or decreasing the current working parameter by the adjustment step size from the current working parameter; a step of determining whether the electrical working data is received; a step of sequentially executing the step of obtaining, the step of adjusting and the step of determining at least once in the case that the electrical working data is received until the electrical working data is no longer received.

2. The method of claim 1, wherein, The step of adjusting comprises: a step of determining the size relationship between the current electrical working data and the electrical working data received last time; a step of determining the adjustment direction of the adjustment step size according to the size relationship, the adjustment direction being increase or decrease; a step of adjusting the current working parameter by the adjustment step size and the adjustment direction.

3. The method according to claim 1 or 2, characterized in that, The working parameter comprises the working frequency and / or the duty cycle of the transmitting coil.

4. The method of claim 1, wherein, The second electrical structure further comprises: a switching device, a first end of the receiving coil being electrically connected with a first end of the heating coil through the switching device; a first energy storage device, a first end of the first energy storage device being electrically connected with a first end of the receiving coil and a first end of the switching device respectively, a second end of the first energy storage device being electrically connected with a second end of the receiving coil, the first energy storage device being further used to be electrically connected with the second appliance, the first energy storage device being used to charge in the case that the switching device is closed and being used to supply power to the second appliance in the case that the switching device is opened.

5. The method according to claim 4, wherein the second electrical structure further comprises: a second energy storage device, a first end of the first energy storage device being electrically connected with a first end of the receiving coil through a first end of the second energy storage device; and a third energy storage device, the switching device being electrically connected with the first end of the heating coil through the third energy storage device. The first electric appliance structure further comprises a fourth energy storage device, and the transmitting coil is electrically connected to the AC power supply through the fourth energy storage device.

6. The method of claim 4, wherein, The second electric appliance structure further comprises: a rectifier device, a first end of the rectifier device being electrically connected to a first end of the first energy storage device and the switch device respectively, and a second end of the rectifier device being electrically connected to a second end of the first energy storage device, the rectifier device being configured to be electrically connected to the second appliance, and the rectifier device being configured to rectify and output a voltage output by the first energy storage device to the second appliance.

7. The method of any one of claims 1, 4-6, wherein, The receiving coil is coaxially arranged with the heating coil, and a distance between the receiving coil and the heating coil ranges from 0 to 50 mm, and a distance between the transmitting coil and the receiving coil ranges from 0 to 50 mm.

8. The method of any one of claims 1, 4-6, wherein, The transmitting coil and the receiving coil are both disc-shaped coils obtained by tightly winding a Litz wire, and the heating coil is a spiral-shaped coil obtained by winding a wire.

9. The method of any one of claims 1, 4-6, wherein, The inductive heating device further comprises: a high magnetic permeability structure, which is arranged on a side of the transmitting coil away from the receiving coil, on a side of the receiving coil away from the transmitting coil, and around the heating coil, and the high magnetic permeability structure is configured to reduce leakage magnetic flux of the first alternating magnetic field and the second alternating magnetic field.

10. The method of any one of claims 1, 4-6, wherein, The first electric appliance structure further comprises: a processing circuit, the transmitting coil being electrically connected to the AC power supply through the processing circuit, and the processing circuit being configured to at least one of filter, rectify, and invert an alternating current output by the AC power supply, and then send the alternating current to the transmitting coil.

11. An induction heating apparatus characterized by comprising: The inductive heating device comprises: an inductive heating device, which comprises a first electric appliance structure and a second electric appliance structure; a first appliance, which is in contact with the heating coil of the second electric appliance structure or is at a distance less than or equal to a predetermined distance from the heating coil; a controller of the first electric appliance structure, which is configured to perform the method of any one of claims 1 to 10; a controller of the second electric appliance structure, which is configured to acquire electrical working data of the receiving coil and / or the heating coil, the electrical working data comprising at least one of actual power, alternating voltage, and alternating current, and in a case where the electrical working data is less than a predetermined threshold, send the electrical working data to the controller of the first electric appliance structure, so that the controller of the first electric appliance structure adjusts a working parameter of the transmitting coil, so that the adjusted electrical working data is greater than or equal to the predetermined threshold.

12. The inductive heating device of claim 11, wherein the electrical working data of the receiving coil and / or the heating coil is acquired at a current time, after the electrical working data of the receiving coil and / or the heating coil is acquired, and in a case where the electrical working data is less than a predetermined threshold, the method further comprises: acquiring the electrical working data of the receiving coil and / or the heating coil at a previous time of the current time, before the electrical working data is sent to the controller of the first electric appliance structure, the method further comprises: acquiring the electrical working data of the receiving coil and / or the heating coil at a previous time of the current time. determining whether the electrical operating data of the previous time point is greater than the electrical operating data of the current time point; in the case that the electrical operating data of the previous time point is greater than the electrical operating data of the current time point, determining whether the electrical operating data of the current time point is less than the predetermined threshold value.

13. The inductive heating apparatus of claim 11 or 12, wherein, The operating parameter includes an operating frequency and / or a duty cycle of the transmitting coil.

Images