Heating power multiplexing circuit and system, electronic device

Abstract

The application discloses a heating and power transmission multiplexing circuit and system and an electronic device. The heating and power transmission multiplexing circuit is used for the electronic device, and the heating and power transmission multiplexing circuit comprises a master control circuit, a rectifier-inverter circuit and a heating and power transmission circuit. The master control circuit is used for receiving a working mode instruction of the electronic device and generating a corresponding voltage signal according to the working mode instruction. The rectifier-inverter circuit has a first input end connected to an alternating current and a second input end connected to an output end of the master control circuit, and is used for converting the alternating current into high-frequency alternating current according to the voltage signal. The heating and power transmission circuit is connected to an output end of the rectifier-inverter circuit, and is used for working in a heating mode or a wireless power supply mode based on the high-frequency alternating current under the control of the working mode instruction. In this way, the electronic circuit and the electronic device can have both the heating function and the wireless power supply function.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a heating power transfer multiplexing circuit and system, and electronic equipment. Background Technology

[0002] Electronic devices typically transmit energy via wires, which consist of a conductor and an insulating material surrounding it. The choice of conductor and insulation material affects the safety of energy transmission. For example, damage or aging of the wire can cause it to lose its seal, leading to short circuits, electrical sparks, and endangering personal safety. Furthermore, the presence of wires increases potential safety hazards and reduces convenience. Therefore, wireless power transmission technology was developed. It fundamentally improves upon these problems by using alternating electromagnetic fields instead of wires as the energy transmission medium, offering advantages such as high safety, reliability, and ease of use.

[0003] Non-radiative magnetic coupling resonance, as a novel wireless power supply technology, enables two resonant objects with the same frequency to generate strong mutual coupling, while only providing weak coupling to receivers at surrounding non-resonant frequencies.

[0004] The inventors of this application discovered during their long-term research and development that magnetic induction heating is a primary heating technology for electronic devices used for heating, such as kitchen appliances. Due to its high energy efficiency, low price, and high reliability, it has been widely used in kitchen appliances and other electronic devices. However, existing kitchen appliances and other electronic devices cannot simultaneously possess heating and wireless power supply functions. Summary of the Invention

[0005] The main technical problem addressed in this application is how to realize electronic circuits and electronic devices that combine heating and wireless power supply functions.

[0006] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a heating power transfer multiplexing circuit. This heating power transfer multiplexing circuit is used in electronic devices and includes: a main control circuit for receiving operating mode commands from the electronic device and generating corresponding voltage signals according to the operating mode commands; a rectifier-inverter circuit, whose first input terminal is connected to AC power and whose second input terminal is connected to the output terminal of the main control circuit, for converting AC power into high-frequency AC power according to the voltage signals; and a heating power transfer circuit connected to the output terminal of the rectifier-inverter circuit, for operating in heating mode or wireless power supply mode based on high-frequency AC power under the control of the operating mode commands.

[0007] In one specific embodiment, the heating and power transmission circuit includes: a switching circuit, one end of which is connected to the output terminal of the rectifier-inverter circuit; a heating circuit and a power transmission circuit, wherein the other end of the switching circuit is selectively connected to the heating circuit or the power transmission circuit under the control of the operating mode command.

[0008] In one specific embodiment, the rectifier-inverter circuit has a first output terminal and a second output terminal. The switching circuit includes a first switch, one end of which is connected to the first output terminal of the rectifier-inverter circuit; a second switch, one end of which is selectively connected to the second output terminal of the rectifier-inverter circuit under the control of a working mode command; and a power transmission circuit including: a first capacitor, the other end of which is selectively connected to one end of the first capacitor under the control of a working mode command; a first coil, one end of which is connected to the other end of the first capacitor; a second capacitor, one end of which is connected to the other end of the first coil; a second coil, one end of which is connected to the other end of the second capacitor, and the other end of which is connected to the second output terminal of the rectifier-inverter circuit; and a third capacitor, one end of which is connected to the other end of the first coil, and the other end of which is connected to the other end of the second switch; wherein the switching action of the first switch is synchronized with the switching action of the second switch.

[0009] In one specific embodiment, the switching circuit further includes a third switch, one end of which is connected to the first output terminal of the rectifier-inverter circuit; the heating circuit includes a fourth capacitor and a second coil, the other end of the third switch being selectively connected to one end of the fourth capacitor under the control of the working mode command, and the other end of the fourth capacitor being connected to one end of the second coil.

[0010] In one specific embodiment, the high-frequency alternating current includes a first high-frequency alternating current and a second high-frequency alternating current. The heating power transfer multiplexing circuit further includes: a driving circuit, whose input terminal is connected to the output terminal of the main control circuit, and whose output terminal is connected to the second input terminal of the rectifier-inverter circuit, for controlling the rectifier-inverter circuit to convert the alternating current into the first high-frequency alternating current or the second high-frequency alternating current according to the voltage signal; a switching circuit selectively transmits the first high-frequency alternating current to the heating circuit or the second high-frequency alternating current to the power transfer circuit under the control of the working mode command; wherein, the voltage value of the second high-frequency alternating current is greater than the voltage value of the first high-frequency alternating current.

[0011] In one specific embodiment, the rectifier-inverter circuit includes: a rectifier circuit whose input terminal is connected to AC power; a bridge inverter circuit whose upper bridge arm input terminal and lower bridge arm input terminal are respectively connected to the output terminal of the drive circuit, and the output terminal of the bridge inverter circuit is connected to the input terminal of the switching circuit.

[0012] In one specific embodiment, the driving circuit has a first high-voltage output terminal, a second high-voltage output terminal, a first low-voltage output terminal, and a second low-voltage output terminal. The bridge inverter circuit includes: a first switching transistor, whose control terminal is connected to the first high-voltage output terminal, whose input terminal is connected to the positive voltage terminal of the rectifier circuit, and whose output terminal is connected to the switching circuit; a second switching transistor, whose control terminal is connected to the second high-voltage output terminal, whose input terminal is connected to the positive voltage terminal of the rectifier circuit, and whose output terminal is connected to the switching circuit; a third switching transistor, whose control terminal is connected to the first low-voltage output terminal, whose input terminal is connected to the output terminal of the first switching transistor, and whose output terminal is connected to the negative voltage terminal of the rectifier circuit; and a fourth switching transistor, whose control terminal is connected to the second low-voltage output terminal, whose input terminal is connected to the output terminal of the second switching transistor, and whose output terminal is connected to the negative voltage terminal of the rectifier circuit.

[0013] In one specific embodiment, the driving circuit further includes a first power supply positive terminal, a first power supply negative terminal, a second power supply positive terminal, and a second power supply negative terminal; a fifth capacitor is connected between the first power supply positive terminal and the first power supply negative terminal, a sixth capacitor is connected between the second power supply positive terminal and the second power supply negative terminal, the first power supply negative terminal is connected to the output terminal of the first switch, and the second power supply negative terminal is connected to the output terminal of the second switch.

[0014] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide an electronic device. This electronic device includes the aforementioned heating power transfer multiplexing circuit.

[0015] To address the aforementioned technical problems, this application provides a heating power transfer multiplexing system. This system includes a conductive device and the aforementioned electronic equipment. Under the control of a working mode command, the heating power transfer circuit wirelessly transmits electrical energy to the conductive device.

[0016] The beneficial effects of this application's embodiments are as follows: The heating power transfer multiplexing circuit of this application is used in electronic devices. The heating power transfer multiplexing circuit includes: a main control circuit, used to receive the operating mode command of the electronic device and generate a corresponding voltage signal according to the operating mode command; a rectifier-inverter circuit, whose first input terminal is connected to AC power and whose second input terminal is connected to the output terminal of the main control circuit, used to convert AC power into high-frequency AC power according to the voltage signal; and a heating power transfer circuit, connected to the output terminal of the rectifier-inverter circuit, used to operate in heating mode or wireless power supply mode based on high-frequency AC power under the control of the operating mode command. In this way, the heating power transfer circuit of this application can operate in heating mode or wireless power supply mode using the high-frequency AC power generated by the rectifier-inverter circuit under the control of the operating mode command of the electronic device. That is, this application can select the operating mode of the heating power transfer multiplexing circuit and the electronic device as heating mode or wireless power supply mode according to the operating mode command, thus realizing an electronic circuit and electronic device that has both heating function and wireless power supply function. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the heating power transfer multiplexing circuit of this application;

[0019] Figure 2 This is a schematic diagram of another embodiment of the heating power transfer multiplexing circuit of this application;

[0020] Figure 3 yes Figure 2 A schematic diagram of the circuit structure of the heating power transfer multiplexing circuit in the embodiment;

[0021] Figure 4 yes Figure 2 A schematic diagram of the circuit structure of the power transmission path in the heating power transmission multiplexing circuit of the embodiment;

[0022] Figure 5 yes Figure 2 A schematic diagram of the heating path in the heating power transfer multiplexing circuit of the embodiment;

[0023] Figure 6 This is a schematic diagram of the structure of an embodiment of the electronic device of this application;

[0024] Figure 7 This is a schematic diagram of the structure of an embodiment of the heating and electrical transfer multiplexing system of this application. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0026] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0027] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] This application first proposes a heating power transfer multiplexing circuit, such as Figure 1 As shown, Figure 1 This is a schematic diagram of an embodiment of the heating power transfer multiplexing circuit of this application. The heating power transfer multiplexing circuit (not shown) of this embodiment includes: a main control circuit 10, a rectifier-inverter circuit 20, and a heating power transfer circuit 30; wherein, the main control circuit 10 is used to receive the operating mode command of an electronic device (not shown) and generate a corresponding voltage signal according to the operating mode command; the first input terminal of the rectifier-inverter circuit 20 is connected to AC power, and the second input terminal of the rectifier-inverter circuit 20 is connected to the output terminal of the main control circuit 10, and the rectifier-inverter circuit 20 is used to convert AC power into high-frequency AC power according to the voltage signal output by the main control circuit 10; the heating power transfer circuit 30 is connected to the output terminal of the rectifier-inverter circuit 20, and the heating power transfer circuit 30 is used to operate in heating mode or wireless power supply mode based on the high-frequency AC power output by the rectifier-inverter circuit 20 under the control of the operating mode command.

[0030] In this embodiment, the electronic device has two operating modes: a heating mode and a wireless power supply mode. The electronic device is equipped with a heating and power transfer multiplexing circuit and an instruction input module (not shown), such as a video input module or a touch screen input module. The instruction input module is connected to the main control circuit 10. The user can obtain the user's operation data through the instruction input module and send the operation data to the main control circuit 10. The main control circuit 10 converts the operation data into corresponding operating mode instructions to control the electronic device (heating and power transfer circuit 30) to work in heating mode or power transfer mode.

[0031] The heating power transmission circuit 30 of this embodiment can operate in heating mode or wireless power supply mode using the high-frequency AC power generated by the rectifier inverter circuit 20 under the control of the electronic device operating mode command. That is, this embodiment can select the operating mode of the heating power transmission circuit 30 as heating mode or wireless power supply mode according to the operating mode command, thus realizing an electronic circuit and electronic device that has both heating function and wireless power supply function.

[0032] Optionally, the heating and power transmission circuit 30 of this embodiment includes: a switching circuit 33, a heating circuit 31, and a power transmission circuit 32; wherein, one end of the switching circuit 33 is connected to the output terminal of the rectifier-inverter circuit 20, and the other end of the switching circuit 33 is selectively connected to the heating circuit 31 or the power transmission circuit 32 under the control of the working mode command, so as to selectively transmit high-frequency AC power to the heating circuit 31 or the power transmission circuit 32 under the control of the working mode command, thereby causing the heating circuit 31 to heat up, i.e., to work in the heating mode, or to cause the power transmission circuit 32 to output electrical energy, i.e., to work in the wireless power supply mode.

[0033] In this embodiment, the switching circuit 33 controls the switching between the heating mode and the wireless power supply mode of the heating power transmission circuit 30, which simplifies the circuit structure and control logic.

[0034] In this embodiment, the electronic device is a kitchen appliance, such as an induction cooker, rice cooker, or stove. In other embodiments, the electronic device may also be other terminal devices.

[0035] In one scenario, the cooktop receives heating operation data via the touchscreen and generates a heating mode command based on the heating operation data through the main control circuit 10. Under the control of the heating mode command, the rectifier-inverter circuit 20 is connected to the heating circuit 31 and outputs high-frequency AC power to the heating circuit 31 so that the heating power transmission circuit 30 works in heating mode to heat the object to be heated.

[0036] In one scenario, the cooktop receives power transmission operation data via the touchscreen and generates a power transmission mode command based on the power transmission operation data through the main control circuit 10. Under the control of the power transmission mode command, the rectifier-inverter circuit 20 is connected to the power transmission circuit 32 and outputs high-frequency AC power to the power transmission circuit 32, so that the heating power transmission circuit 30 works in power supply mode. At this time, the heating power transmission circuit 30 is the power supply end, wirelessly transmitting electrical energy to the conductive device to power the conductive device.

[0037] The heating power transfer multiplexing circuit of this embodiment is applied in the field of kitchen appliances, which can realize "coil-free kitchen appliances". It can solve the problems of cumbersome power cord storage, space occupation and safety of kitchen appliances, making home life simple, beautiful and safer, and providing people with unlimited convenience.

[0038] Of course, the heating power transfer multiplexing circuit of this embodiment can also be applied to other electronic equipment fields.

[0039] Typically, the power output of wireless power supply mode is higher than that of heating mode. To address this technical issue, this application further proposes a heating power transfer multiplexing circuit, such as... Figures 2 to 4 As shown, Figure 2 This is a schematic diagram of another embodiment of the heating power transfer multiplexing circuit of this application; Figure 3 yes Figure 2 A schematic diagram of the circuit structure of the heating power transfer multiplexing circuit in the embodiment; Figure 4 yes Figure 2 A schematic diagram of the circuit structure of the power transmission path in the heating power transmission multiplexing circuit of the embodiment; Figure 5 yes Figure 2 This embodiment shows a schematic diagram of the heating path in the heating power transfer multiplexing circuit. The high-frequency AC power in this embodiment includes a first high-frequency AC power and a second high-frequency AC power, with the voltage value of the second high-frequency AC power being greater than that of the first high-frequency AC power. The heating power transfer multiplexing circuit (not shown in the figure) in this embodiment includes: a main control circuit 10, a drive circuit 40, a rectifier-inverter circuit 20, and a heating power transfer circuit 30. The main control circuit 10 receives the operating mode command from the electronic device (not shown) and generates a corresponding voltage signal according to the operating mode command. The input terminal of the drive circuit 40 is connected to the output terminal of the main control circuit 10, and the output terminal of the drive circuit 40 is connected to the rectifier-inverter circuit 30. The second input terminal of circuit 20 is connected to AC power, and the first input terminal of rectifier-inverter circuit 20 is connected to AC power. The drive circuit 40 is used to control rectifier-inverter circuit 20 to convert AC power into first high-frequency AC power or second high-frequency AC power according to the voltage signal output by main control circuit 10. The heating power transmission circuit 30 is connected to the output terminal of rectifier-inverter circuit 20. The heating power transmission circuit 30 is used to operate in heating mode based on the first high-frequency AC power output by rectifier-inverter circuit 20 or in wireless power supply mode based on the second high-frequency AC power output by rectifier-inverter circuit 20 under the control of the working mode command.

[0040] In this embodiment, the electronic device has two operating modes: a heating mode and a wireless power supply mode. The electronic device is equipped with a heating and power transfer multiplexing circuit and an instruction input module (not shown), such as a video input module or a touch screen input module. The instruction input module is connected to the main control circuit 10. The user can obtain the user's operation data through the instruction input module and send the operation data to the main control circuit 10. The main control circuit 10 converts the operation data into corresponding operating mode instructions to control the electronic device (heating and power transfer circuit 30) to work in heating mode or power transfer mode.

[0041] The heating power transmission circuit 30 of this embodiment can operate in heating mode using the first high-frequency AC power generated by the rectifier-inverter circuit 20 or in wireless power supply mode using the second high-frequency AC power generated by the rectifier-inverter circuit 20 under the control of the electronic device operating mode command. That is, this embodiment can select the operating mode of the heating power transmission circuit 30 as heating mode or wireless power supply mode according to the operating mode command, thus realizing an electronic circuit and electronic device that has both heating function and wireless power supply function.

[0042] Furthermore, in this embodiment, the voltage value of the second high-frequency AC power is greater than the voltage value of the first high-frequency AC power, so that the heating power transmission circuit 30 uses the low-power first high-frequency AC power for heating to save power consumption, while using the high-power second high-frequency AC power for power supply to increase the power transmission distance or increase the power supply energy.

[0043] Optionally, the heating and power transmission circuit 30 of this embodiment includes: a switching circuit 33, a heating circuit 31, and a power transmission circuit 32; wherein, one end of the switching circuit 33 is connected to the output terminal of the rectifier-inverter circuit 20, and the other end of the switching circuit 33 is selectively connected to the heating circuit 31 or the power transmission circuit 32 under the control of the working mode command, so as to transmit the first high-frequency AC power to the heating circuit 31 under the control of the working mode command, thereby heating the heating circuit 31, i.e., working in the heating mode, or transmit the second high-frequency AC power to the power transmission circuit 32, so that the power transmission circuit 32 outputs electrical energy, i.e., working in the wireless power supply mode.

[0044] In this embodiment, the switching circuit 33 is used to control the switching between the heating mode and the wireless power supply mode of the heating power transmission circuit, which simplifies the circuit structure and control logic.

[0045] In this embodiment, the electronic device is a kitchen appliance, such as an induction cooker, rice cooker, or stove. In other embodiments, the electronic device may also be other terminal devices.

[0046] In one scenario, the cooktop receives heating operation data via the touchscreen and generates a heating mode command from the heating operation data via the main control circuit 10. Under the control of the heating mode command, the rectifier-inverter circuit 20 generates a first high-frequency AC power. Under the control of the heating mode command, the rectifier-inverter circuit 20 is connected to the heating circuit 31 and outputs the first high-frequency AC power to the heating circuit 31, so that the heating power transmission circuit 30 works in the heating mode to heat the object to be heated.

[0047] In one scenario, the cooktop receives power transmission operation data via the touchscreen and generates a power transmission mode command from the power transmission operation data via the main control circuit 10. Under the control of the power transmission mode command, the rectifier-inverter circuit 20 generates a second high-frequency AC power. Under the control of the power transmission mode command, the rectifier-inverter circuit 20 is connected to the power transmission circuit 32 and outputs the second high-frequency AC power to the power transmission circuit 32 so that the heating power transmission circuit 30 operates in power supply mode. At this time, the heating power transmission circuit 30 is the power supply end, wirelessly transmitting electrical energy to the conductive device to power the conductive device.

[0048] The heating power transfer multiplexing circuit of this embodiment is applied in the field of kitchen appliances, which can realize "coil-free kitchen appliances". It can solve the problems of cumbersome power cord storage, space occupation and safety of kitchen appliances, making home life simple, beautiful and safer, and providing people with unlimited convenience.

[0049] Optionally, the rectifier-inverter circuit 20 of this embodiment has a first output terminal S1 and a second output terminal S2. The switching circuit 33 includes a first switch K1 and a second switch K2. One end of the first switch K1 is connected to the first output terminal S1 of the rectifier-inverter circuit 20. One end of the second switch K2 is selectively connected to the second output terminal S2 of the rectifier-inverter circuit 20 under the control of the working mode command. The power transmission circuit 32 of this embodiment includes: a first capacitor C1, a first coil L1, a second capacitor C2, a second coil L2, and a third capacitor C3. The other end of the first switch K1 is in the working mode. Under the control of the instruction, one end of the first capacitor C1 is selectively connected; one end of the first coil L1 is connected to the other end of the first capacitor C1; one end of the second capacitor C2 is connected to the other end of the first coil L1; one end of the second coil L2 is connected to the other end of the second capacitor C2, and the other end of the second coil L2 is connected to the second output terminal S2 of the rectifier-inverter circuit 20; one end of the third capacitor C3 is connected to the other end of the first coil L1, and the other end of the third capacitor C3 is connected to the other end of the second switch K2; wherein, the switching action of the first switch K1 is synchronized with the switching action of the second switch K2.

[0050] Optionally, the switching circuit 33 in this embodiment further includes a third switch K3, one end of which is connected to the first output terminal S1 of the rectifier-inverter circuit 20; the heating circuit 31 in this embodiment includes a fourth capacitor C4 and a second coil L2, the other end of the third switch K3 is selectively connected to one end of the fourth capacitor C4 under the control of the working mode command, and the other end of the fourth capacitor C4 is connected to one end of the second coil L2.

[0051] When the main control circuit 10 receives the power transmission operation data, it generates a power transmission mode command. Under the control of the power transmission mode command, the rectifier-inverter circuit 20 generates a second high-frequency AC power. Under the control of the power transmission mode command, the heating power transmission circuit 30 controls the first switch K1 and the second switch K2 to close and controls the third switch K3 to open, so that the rectifier-inverter circuit 20 is connected to the power transmission circuit 32 through the switching circuit 33. The rectifier-inverter circuit 20 outputs the second high-frequency AC power to the power transmission circuit 32, so that the heating power transmission circuit 30 operates in power supply mode. At this time, the heating power transmission circuit 30 is the power supply end, wirelessly transmitting electrical energy to the conductive device to supply power to the conductive device.

[0052] When the heating and power transmission circuit 30 is in power supply mode, the first switch K1 and the second switch K2 are closed. The second coil L2 and the second capacitor C2 are connected in series and then connected in parallel with the third capacitor C3 to form a resonant cavity. At the same time, the first coil L1 and the first capacitor C1 are connected in series and then connected in series with the third capacitor C3 to form a resonant cavity. This forms a resonant circuit, which generates electromagnetic waves at the first resonant frequency to provide wireless power to the conductive equipment.

[0053] When the main control circuit 10 receives heating operation data, it generates a heating mode command from the heating operation data. Under the control of the heating mode command, the rectifier-inverter circuit 20 generates a first high-frequency AC power. Under the control of the heating mode command, the heating power transmission circuit 30 controls the first switch K1 and the second switch K2 to open and controls the third switch K3 to close, so that the rectifier-inverter circuit 20 is connected to the heating circuit 31 through the switching circuit 33. The rectifier-inverter circuit 20 outputs the first high-frequency AC power to the heating circuit 31, so that the heating power transmission circuit 30 operates in heating mode.

[0054] When the heating circuit 30 is in heating mode, the first switch K1 and the second switch K2 are open, the third switch K3 is closed, and the fourth capacitor C4 and the second coil L2 form a series resonant circuit to generate electromagnetic waves at the second resonant frequency, thereby electromagnetically heating the object to be heated.

[0055] In this embodiment, both the heating circuit 31 and the power transmission circuit 32 operate using electromagnetic wave signals. They can share the second coil L2, which simplifies the circuit structure, saves costs, and facilitates the miniaturization of electronic devices.

[0056] Of course, in other embodiments, to simplify control, the heating circuit and the power transmission circuit can be implemented by independent circuit structures, such as the power transmission circuit using a coil and the heating circuit using a heating wire.

[0057] Optionally, the rectifier-inverter circuit 20 of this embodiment includes: a rectifier circuit 21 and a bridge inverter circuit 22; wherein, the input terminal of the rectifier circuit 21 is connected to AC power; the upper bridge arm input terminal and the lower bridge arm input terminal of the bridge inverter circuit 22 are respectively connected to the output terminal of the drive circuit 40, and the output terminal of the bridge inverter circuit 22 is connected to the input terminal of the switching circuit.

[0058] The alternating current described in this embodiment can be obtained from an AC power supply device or directly from the mains power.

[0059] The rectifier-inverter circuit 20 of this embodiment includes a rectifier section (rectifier circuit 21) and an inverter section (bridge inverter circuit 22). The rectifier section rectifies AC power into DC power, and the inverter section converts the rectified DC power into high-frequency AC power.

[0060] In this embodiment, the rectifier circuit 21 includes diodes D1, D2, D3, and D4; these four diodes form a bridge rectifier. This bridge rectifier can rectify 220V, 50 / 60Hz AC power into DC power. The input terminals of the rectifier circuit 21 include ports AC1 and AC2 for inputting AC power, and the output terminals of the rectifier circuit 21 include a positive voltage terminal V+ and a negative voltage terminal V- for outputting rectified DC power.

[0061] In this embodiment, the inverter section of the rectifier-inverter circuit 20 adopts a bridge inverter circuit 22, which can improve the power of the high-frequency AC power after inversion, thereby increasing the power transmission distance or increasing the power supply.

[0062] Optionally, the bridge inverter circuit 22 of this embodiment includes: a first switch Q1, a second switch Q2, a third switch Q3 and a fourth switch Q4; the drive circuit 40 of this embodiment is provided with a first high voltage output terminal HO1, a second high voltage output terminal HO2, a first low voltage output terminal LO1 and a second low voltage output terminal LO2.

[0063] Specifically, the control terminal of the first switch Q1 is connected to the first high-voltage output terminal HO1 of the drive circuit 40, the input terminal of the first switch Q1 is connected to the positive voltage terminal V+ of the rectifier circuit 21, and the output terminal of the first switch Q1 is connected to the switching circuit 33; the control terminal of the second switch Q2 is connected to the second high-voltage output terminal HO2 of the drive circuit 40, the input terminal of the second switch Q2 is connected to the positive voltage terminal V+ of the rectifier circuit 21, and the output terminal of the second switch Q2 is connected to the switching circuit 33; the control terminal of the third switch Q3 is connected to the first low-voltage output terminal LO1 of the drive circuit 40, the input terminal of the third switch Q3 is connected to the output terminal of the first switch Q1, and the output terminal of the third switch Q3 is connected to the negative voltage terminal V- of the rectifier circuit 21; the control terminal of the fourth switch Q4 is connected to the second low-voltage output terminal LO2 of the drive circuit 40, the input terminal of the fourth switch Q4 is connected to the output terminal of the second switch Q2, and the output terminal of the fourth switch Q4 is connected to the negative voltage terminal V- of the rectifier circuit 21.

[0064] In this embodiment, the bridge inverter circuit 22 is a full-bridge inverter circuit, which can improve the power of the high-frequency AC power after inversion, thereby increasing the power transmission distance or improving the power supply. Of course, in other embodiments, to simplify the circuit structure, a half-bridge inverter circuit can be used instead of the full-bridge inverter circuit of this application.

[0065] Optionally, in this embodiment, the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 are all insulated gate bipolar transistors (IGBTs). Specifically, the gate of the first switch Q1 is connected to the first high-voltage output terminal HO1 of the driving circuit 40 via a gate resistor R1, the collector of the first switch Q1 is connected to the positive voltage terminal V+ of the rectifier circuit 21, and the emitter of the first switch Q1 is connected to the switching circuit 33. The gate of the second switch Q2 is connected to the second high-voltage output terminal HO2 of the driving circuit 40 via a gate resistor R2, the collector of the second switch Q2 is connected to the positive voltage terminal V+ of the rectifier circuit 21, and the emitter of the second switch Q2 is connected to the switching circuit 33. The third switch Q4... The gate of switch Q3 is connected to the first low-voltage output terminal LO1 of drive circuit 40 through gate resistor R3. The gate of third switch Q3 is connected to the emitter of first switch Q1. The emitter of third switch Q3 is connected to the negative voltage terminal V- of rectifier circuit 21. The gate of fourth switch Q4 is connected to the second low-voltage output terminal LO2 of drive circuit 40 through gate resistor R4. The collector of fourth switch Q4 is connected to the emitter of second switch Q2. The emitter of fourth switch Q4 is connected to the negative voltage terminal V- of rectifier circuit 21.

[0066] IGBTs are composite, fully controllable, voltage-driven power semiconductor devices composed of BJTs (bipolar junction transistors) and MOSFETs (insulated-gate field-effect transistors). They combine the advantages of high input impedance of MOSFETs and low on-state voltage drop of high-power transistors. High-power transistors have low saturation voltage and high current density, but require large drive current; MOSFETs have very low drive power and fast switching speed, but large on-state voltage drop and low current density. IGBTs combine the advantages of both types of devices, offering low drive power and low saturation voltage.

[0067] Furthermore, bootstrap diodes (not shown in the figure) can be provided for the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 respectively.

[0068] In other implementations, MOSFETs or other power transistors can be used instead of IGBTs.

[0069] Optionally, the driving circuit 40 in this embodiment further includes a first power supply positive terminal VB1, a first power supply negative terminal VS1, a second power supply positive terminal VB2, and a second power supply negative terminal VS2; a fifth capacitor C5 is connected between the first power supply positive terminal VB1 and the first power supply negative terminal VS1, a sixth capacitor C6 is connected between the second power supply positive terminal VB2 and the second power supply negative terminal VS2, the first power supply negative terminal VS1 is connected to the output terminal of the first switch Q1, and the second power supply negative terminal VS2 is connected to the output terminal of the second switch Q2.

[0070] In this embodiment, the output terminal of the first switch Q1 is connected to the negative terminal VS1 of the first power supply, and a fifth capacitor C5 is connected between the positive terminal VB1 of the first power supply and the negative terminal VS1 of the first power supply. This ensures that the voltage at the negative terminal VS1 of the first power supply is maintained at a certain voltage, guaranteeing the normal operation of the third switch Q3. Similarly, in this embodiment, the output terminal of the second switch Q2 is connected to the negative terminal VS2 of the second power supply, and a sixth capacitor C6 is connected between the positive terminal VB2 of the second power supply and the negative terminal VS2 of the second power supply. This ensures that the voltage at the negative terminal VS2 of the second power supply is maintained at a certain voltage, guaranteeing the normal operation of the fourth switch Q4.

[0071] Furthermore, the driving circuit 40 in this embodiment is further provided with a first high voltage input terminal H11, a second high voltage input terminal H12, a first low voltage input terminal L11 and a second low voltage input terminal L12, etc., and these ports are respectively connected to the corresponding output ports of the main control circuit 10.

[0072] In this embodiment, the drive circuit 40 is integrated with the rectifier-inverter circuit 20 to form an integrated circuit module (not shown in the figure).

[0073] The first high-voltage input terminal H11 of the driving circuit 40 serves as the first high-voltage area input terminal H1 of the integrated circuit module, the second high-voltage input terminal H12 serves as the second high-voltage area input terminal H2 of the integrated circuit module, the first low-voltage input terminal L11 serves as the first low-voltage area input terminal L10 of the integrated circuit module, and the second low-voltage input terminal L12 serves as the second low-voltage area input terminal L20 of the integrated circuit module.

[0074] Specifically, the first high-voltage input terminal H11 of the drive circuit 40 provides voltage to the first high-voltage output terminal HO1 of the drive circuit 40 to control the first switching transistor Q1; the second high-voltage input terminal H12 of the drive circuit 40 provides voltage to the second high-voltage output terminal HO2 of the drive circuit 40 to control the second switching transistor Q2; the first low-voltage input terminal L11 of the drive circuit 40 provides voltage to the first low-voltage output terminal LO1 of the drive circuit 40 to control the third switching transistor Q3; and the second low-voltage input terminal L12 of the drive circuit 40 provides voltage to the first low-voltage output terminal LO2 of the drive circuit 40 to control the fourth switching transistor Q.

[0075] The input terminal of the drive circuit 40 receives a 0V or 5V input signal; the GND terminal of the drive circuit 40 serves as the negative terminal COM of the low-voltage power supply for the integrated circuit module; the first positive power supply terminal VB1 of the drive circuit 40 can serve as the positive terminal B1 of the high-voltage power supply for the integrated circuit module; the first negative power supply terminal VS1 of the drive circuit 40 can serve as the negative terminal S1 of the high-voltage power supply for the integrated circuit module, which is also the first output terminal S1 of the rectifier-inverter circuit 20; the second positive power supply terminal VB2 of the drive circuit 40 can serve as the positive terminal B2 of the high-voltage power supply for the integrated circuit module; the second negative power supply terminal VS2 of the drive circuit 40 can serve as the negative terminal S2 of the high-voltage power supply for the integrated circuit module, which is also the first output terminal S2 of the rectifier-inverter circuit 20; the emitter of the third switch Q3 can serve as the low-voltage reference terminal VN1 of the integrated circuit module; the emitter of the fourth switch Q4 can serve as the low-voltage reference terminal VN2 of the integrated circuit module.

[0076] In this embodiment, the driving circuit 40 can be an HVIC transistor, where VDD is the positive power supply terminal of the HVIC transistor and GND is the negative power supply terminal of the HVIC transistor; the VDD-GND voltage is typically 15V; the 0 or 5V logic input signals from the first high-voltage input terminal H11, the second high-voltage input terminal H12, the first low-voltage input terminal L11, and the second low-voltage input terminal L12 of the driving circuit 40 are respectively transmitted to the first high-voltage output terminal HO1, the second high-voltage output terminal HO2, the first low-voltage output terminal LO1, and the second low-voltage output terminal LO2; wherein, the first The high-voltage output terminal HO1 is the logic output signal of the first power supply negative terminal VS1 or the first power supply negative terminal VS1+15V. The second high-voltage output terminal HO2 is the logic output signal of the second power supply negative terminal VS2 or the second power supply negative terminal VS2+15V. The first low-voltage output terminal LO1 and the second low-voltage output terminal LO2 are logic output signals of 0 or 15V. The input signals of the same phase cannot be high at the same time, that is, the first high-voltage input terminal H11 and the first low-voltage input terminal L11, the second high-voltage output terminal HO2 and the second low-voltage output terminal LO2 cannot be high at the same time.

[0077] The drive circuit 40 can boost the input voltage and then supply it to the rectifier-inverter circuit 20.

[0078] Furthermore, diode D5 can be placed between the positive terminal VDD of the power supply and the positive terminal VB1 of the first power supply to prevent voltage reverse flow; diode D6 can be placed between the positive terminal VDD of the power supply and the positive terminal VB2 of the second power supply to prevent voltage reverse flow.

[0079] This application further proposes an electronic device, such as Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of an embodiment of the electronic device of this application. The electronic device 60 of this application includes a heating power transfer multiplexing circuit 61. The structure and working principle of the heating power transfer multiplexing circuit 61 can be found in the heating power transfer multiplexing circuit of the above embodiment, and will not be repeated here.

[0080] In this embodiment, the electronic device 60 has two operating modes: a heating mode and a wireless power supply mode.

[0081] Furthermore, the electronic device 60 of this application also includes an instruction input module 62, such as a video input module or a touch screen input module. The instruction input module 62 is connected to the main control circuit (shown in the figure) in the heating and power transfer multiplexing circuit 61. The user can obtain the user's operation data through the instruction input module 62 and send the operation data to the main control circuit. The main control circuit converts the operation data into corresponding working mode instructions to control the electronic device 60 to work in heating mode or power transfer mode.

[0082] In this embodiment, the electronic device 60 is a kitchen appliance, such as an induction cooker, rice cooker, or stove. In other embodiments, the electronic device can also be other terminal devices.

[0083] In this embodiment, the electronic device 60 is applied in the field of kitchen appliances, which can realize "coil-free kitchen appliances". It can solve the problems of cumbersome power cord storage, space occupation and safety of kitchen appliances, making home life simple, beautiful and safer, and providing people with unlimited convenience.

[0084] This application further proposes a heating power transfer multiplexing system, such as Figure 7 As shown, Figure 7 This is a schematic diagram of a heating power transfer multiplexing system according to an embodiment of this application. The heating power transfer multiplexing system 70 in this embodiment includes a conductive device 71 and an electronic device 60. Under the control of the working mode command, the electronic device 60 wirelessly transmits electrical energy to the conductive device 71, that is, the electronic device 60 acts as a power supply terminal to wirelessly power the conductive device 71.

[0085] The size and shape of the coil in the electronic device 60 are made as consistent as possible with the coil in the conductive device 71 in order to improve the coupling coefficient and energy utilization.

[0086] The electronic device 60 can be referred to in the above embodiments, and will not be repeated here.

[0087] Unlike existing technologies, this application's heating power transfer multiplexing circuit is used in electronic devices. The heating power transfer multiplexing circuit includes: a main control circuit, used to receive operating mode commands from the electronic device and generate corresponding voltage signals according to the operating mode commands; a rectifier-inverter circuit, whose first input terminal is connected to AC power and whose second input terminal is connected to the output terminal of the main control circuit, used to convert AC power into high-frequency AC power according to the voltage signals; and a heating power transfer circuit, connected to the output terminal of the rectifier-inverter circuit, used to operate in heating mode or wireless power supply mode based on the high-frequency AC power under the control of the operating mode commands. In this way, the heating power transfer circuit of this application can operate in heating mode or wireless power supply mode using the high-frequency AC power generated by the rectifier-inverter circuit under the control of the electronic device's operating mode commands. That is, this application can select the operating mode of the heating power transfer multiplexing circuit and the electronic device as heating mode or wireless power supply mode according to the operating mode commands, thus realizing electronic circuits and electronic devices that combine heating and wireless power supply functions.

[0088] Furthermore, the heating power transfer multiplexing circuit of this application further includes a driving circuit, which controls the rectifier-inverter circuit to convert AC power into a first high-frequency AC power or a second high-frequency AC power according to the voltage signal output by the main control circuit. The voltage value of the second high-frequency AC power is greater than the voltage value of the first high-frequency AC power, so that the heating power transfer circuit uses the low-power first high-frequency AC power for heating to save power consumption, while using the high-power second high-frequency AC power for power supply to increase the power transmission distance or increase the power supply energy, which is suitable for high-power power supply scenarios.

[0089] Furthermore, the rectifier-inverter circuit in the heating power transfer multiplexing circuit of this application adopts a full-bridge inverter circuit, which can improve the power of the high-frequency AC power after inversion, thereby increasing the power transmission distance or increasing the power supply, and is suitable for high-power power supply scenarios.

[0090] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A heating power transfer multiplexing circuit, characterized in that, For use in electronic devices, the heating power transfer multiplexing circuit includes: The main control circuit is used to receive the operating mode command of the electronic device and generate a corresponding voltage signal according to the operating mode command; The rectifier-inverter circuit has an AC power input terminal and a second input terminal connected to the output terminal of the main control circuit, used to convert the AC power into high-frequency AC power according to the voltage signal; A heating power transmission circuit is connected to the output terminal of the rectifier-inverter circuit and is used to operate in heating mode or wireless power supply mode based on the high-frequency AC power under the control of the working mode command. The heating power transmission circuit includes: A switching circuit, one end of which is connected to the output terminal of the rectifier-inverter circuit; The heating circuit and the power transmission circuit, wherein the other end of the switching circuit is selectively connected to the heating circuit or the power transmission circuit under the control of the working mode command; The rectifier-inverter circuit is provided with a first output terminal and a second output terminal, and the switching circuit includes a first switch, one end of which is connected to the first output terminal of the rectifier-inverter circuit. The second switch has one end selectively connected to the second output terminal of the rectifier-inverter circuit under the control of the working mode command. The power transmission circuit includes: The first capacitor, and the other end of the first switch is selectively connected to one end of the first capacitor under the control of the working mode command; The first coil has one end connected to the other end of the first capacitor; The second capacitor has one end connected to the other end of the first coil; The second coil has one end connected to the other end of the second capacitor and the other end connected to the second output terminal of the rectifier-inverter circuit. The third capacitor has one end connected to the other end of the first coil and the other end connected to the other end of the second switch. The switching action of the first switch is synchronized with the switching action of the second switch.

2. The heating power transfer multiplexing circuit according to claim 1, characterized in that, The switching circuit further includes a third switch, one end of which is connected to the first output terminal of the rectifier-inverter circuit. The heating circuit includes a fourth capacitor and a second coil. The other end of the third switch is selectively connected to one end of the fourth capacitor under the control of the working mode command, and the other end of the fourth capacitor is connected to one end of the second coil.

3. The heating power transfer multiplexing circuit according to claim 1, characterized in that, The high-frequency alternating current includes a first high-frequency alternating current and a second high-frequency alternating current, and the heating power transfer multiplexing circuit further includes: A drive circuit, whose input terminal is connected to the output terminal of the main control circuit and whose output terminal is connected to the second input terminal of the rectifier-inverter circuit, is used to control the rectifier-inverter circuit to convert the AC power into the first high-frequency AC power or the second high-frequency AC power according to the voltage signal; Under the control of the operating mode command, the switching circuit selectively transmits the first high-frequency AC power to the heating circuit or the second high-frequency AC power to the power transmission circuit. The voltage value of the second high-frequency alternating current is greater than the voltage value of the first high-frequency alternating current.

4. The heating power transfer multiplexing circuit according to claim 3, characterized in that, The rectifier-inverter circuit includes: A rectifier circuit, the input of which is connected to the AC power; The bridge inverter circuit has its upper and lower bridge arm inputs connected to the output of the drive circuit, and its output is connected to the input of the switching circuit.

5. The heating power transfer multiplexing circuit according to claim 4, characterized in that, The drive circuit is provided with a first high-voltage output terminal, a second high-voltage output terminal, a first low-voltage output terminal, and a second low-voltage output terminal. The bridge inverter circuit includes: The first switching transistor has its control terminal connected to the first high-voltage output terminal, its input terminal connected to the positive voltage terminal of the rectifier circuit, and its output terminal connected to the switching circuit. The second switching transistor has its control terminal connected to the second high-voltage output terminal, its input terminal connected to the positive voltage terminal of the rectifier circuit, and its output terminal connected to the switching circuit. The third switching tube has its control terminal connected to the first low-voltage output terminal, its input terminal connected to the output terminal of the first switching tube, and its output terminal connected to the negative voltage terminal of the rectifier circuit. The fourth switching transistor has its control terminal connected to the second low-voltage output terminal, its input terminal connected to the output terminal of the second switching transistor, and its output terminal connected to the negative voltage terminal of the rectifier circuit.

6. The heating power transfer multiplexing circuit according to claim 5, characterized in that, The driving circuit is further provided with a first power supply positive terminal, a first power supply negative terminal, a second power supply positive terminal, and a second power supply negative terminal; A fifth capacitor is connected between the positive terminal and the negative terminal of the first power supply, and a sixth capacitor is connected between the positive terminal and the negative terminal of the second power supply. The negative terminal of the first power supply is connected to the output terminal of the first switch, and the negative terminal of the second power supply is connected to the output terminal of the second switch.

7. An electronic device, characterized in that, Includes the heating power transfer multiplexing circuit as described in any one of claims 1 to 6.

8. A heating and electrical transfer multiplexing system, characterized in that, The device includes a conductive device and the electronic device of claim 7, wherein the heating and power transmission circuit wirelessly transmits electrical energy to the conductive device under the control of the operating mode command.

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