CN219351364U - Wireless power supply and heating multiplexing device and electrical equipment - Google Patents

Abstract

The embodiment of the application provides a wireless power supply and heating multiplexing device and electrical equipment. The device comprises: a power module; the wireless power supply and heating multiplexing module is connected with the power supply module and is used for realizing a wireless power supply function and a heating function; the resonance pulse acquisition module is respectively connected with the wireless power supply and multiplexing module and the power supply module and is used for acquiring resonance pulses generated by the wireless power supply and heating multiplexing module; the control module is respectively connected with the wireless power supply and heating multiplexing module and the resonance pulse acquisition module and is used for determining load information according to parameters of the resonance pulse. The device is provided with a resonant pulse acquisition module, can acquire resonant pulses generated after the wireless power supply and heating multiplexing module is driven, and a control module can determine load information according to parameters of the resonant pulses.

Description

Wireless power supply and heating multiplexing device and electrical equipment

Technical Field

The application relates to the technical field of household appliances, in particular to a wireless power supply and heating multiplexing device and electrical equipment.

Background

Currently, a heating coil is generally present on a cooking appliance, and in order to improve the hardware utilization rate of the heating coil, the heating coil realizes a wireless power supply function and also multiplexes the wireless power supply function in addition to the heating function.

In the related art, a heating function button and a wireless power supply function button are arranged on a function panel of the cooking appliance, so that a user can start the cooking appliance to realize the heating function or the wireless power supply function according to the use requirement of the user. For example, the user may press the heating function button when he or she wants to cook a dish.

In the related art, a control scheme of the cooking appliance is complicated.

Disclosure of Invention

The embodiment of the application provides a wireless power supply and heating multiplexing device and electrical equipment.

In a first aspect, an embodiment of the present application provides a wireless power supply and heating multiplexing device, including: a power module; the wireless power supply and heating multiplexing module is connected with the power supply module and is used for realizing a wireless power supply function and a heating function; the resonance pulse acquisition module is respectively connected with the wireless power supply and multiplexing module and the power supply module and is used for acquiring resonance pulses generated by the wireless power supply and heating multiplexing module; the control module is respectively connected with the wireless power supply and heating multiplexing module and the resonance pulse acquisition module and is used for determining information according to parameters of the resonance pulse.

In some embodiments, the resonant pulse acquisition module includes a current sampling sub-module and a pulse output sub-module; the current sampling submodule is respectively connected with the wireless power supply and heating multiplexing module and the pulse output submodule and is used for sampling the resonance current generated by the wireless power supply and heating multiplexing module to obtain a sampling signal; and the pulse output sub-module is used for outputting resonance pulses according to the sampling signals.

In some embodiments, the current sampling submodule includes a current transformer, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a first diode, and a second diode; the first diode and the second diode form a parallel circuit, a first end of the parallel circuit is connected with the power module, and a second end of the parallel circuit is grounded; the current transformer is connected with the first resistor, the first capacitor, the parallel circuit and the second capacitor in parallel in sequence; the third resistor is connected between the parallel loop and the first capacitor; the fourth resistor is connected between the parallel loop and the second capacitor; the fifth resistor is connected between the parallel loop and the power module; the pulse output submodule comprises a comparator and a sixth resistor, wherein the input end of the comparator is connected with the second capacitor in parallel, and the output end of the comparator is connected with the sixth resistor in series and then connected to the power supply module.

In some embodiments, the wireless power and heat multiplexing module comprises: the device comprises a driving sub-module, a first switch sub-module, a second switch sub-module and a resonance sub-module; a compensation sub-module; the driving submodule is connected with the first switch submodule; the second switch submodule is respectively connected with the harmonic oscillator submodule, the compensation submodule and the first switch submodule; the harmonic oscillator module is connected with the harmonic pulse acquisition module.

In some embodiments, the drive sub-module includes a first pulse generator, a second pulse generator; the first switch submodule comprises a first switch and a second switch, and the first switch and the second switch are connected in series and then connected to two ends of the power supply module; the first pulse generator is connected with the first switch; the second pulse generator is connected with a second switch; the harmonic oscillator module comprises a first inductor, a third capacitor and a fourth capacitor; the second switch submodule comprises a third switch, a fourth switch and a fifth switch; the compensation sub-module comprises a second inductor and a fifth capacitor; after the first inductor, the third capacitor, the second inductor and the third switch are sequentially connected in series, one end far away from the third switch is connected with the current sampling submodule, and one end near the third switch is connected with a common end of the first switch and the second switch; after the fourth capacitor and the fourth switch are sequentially connected in series, one end far away from the fourth switch is connected between the first inductor and the third capacitor, and one end close to the third switch is connected with a common end of the first switch and the second switch; after the fifth switch and the fifth capacitor are sequentially connected in series, one end far away from the fifth switch is connected between the second inductor and the third capacitor, and the other end close to the fifth switch is grounded.

In some embodiments, the wireless power and heat multiplexing module further comprises an absorption submodule comprising a sixth capacitor and a seventh capacitor; the sixth capacitor is connected with the first switch in parallel; one end of the sixth capacitor is connected with the power module, and the other end of the sixth capacitor is connected with the common end of the first switch and the second switch, the third switch and the fourth switch; the seventh capacitor is connected with the second switch in parallel; one end of the seventh capacitor is grounded, and the other end of the seventh capacitor is connected to the common end of the first switch and the second switch, the third switch and the fourth switch.

In some embodiments, the wireless power and heat multiplexing module further comprises a wireless power take-off module; the wireless electronic taking module comprises a signal receiving unit, a third inductor and an eighth capacitor; one end of the signal receiving unit is sequentially connected with the third inductor and the eighth capacitor to form a loop; the other end of the signal receiving unit is connected with a load; the third inductor is arranged opposite to the first inductor.

In some embodiments, a power module includes: the system comprises an alternating current power supply sub-module, a filter circuit sub-module, a rectifying circuit sub-module, a fourth inductor and a ninth capacitor; the filter circuit submodule is connected between the alternating current power supply submodule and the rectifying circuit submodule; after the fourth inductor and the ninth capacitor are connected in series, one end far away from the ninth capacitor is connected with the voltage output end of the rectifying circuit submodule, and the end close to the ninth capacitor is grounded; and the common end of the fourth inductor and the ninth capacitor is connected with the wireless power supply and heating multiplexing module.

In a second aspect, an embodiment of the present application provides an electrical apparatus, including: a housing; and the wireless power supply and heating multiplexing device of the first aspect is arranged in the shell.

In some embodiments, the electrical device further comprises a location detection module for detecting a placement location of the wireless powered load; the housing includes a first housing; the first shell comprises a first surface and a second surface which are mutually away from each other; the first surface is used for placing a load; the second surface is arranged opposite to the first inductor in the wireless power supply and heating multiplexing device; the position detection module is arranged between the second surface and the first inductor.

In some embodiments, the position detection module includes a magnetic sensor for sensing magnetic material in the wireless power receiving load; or/and, the position detection module comprises a color sensor for sensing a first color coating in the wireless power receiving load.

In some embodiments, the location detection module further comprises a first wireless signal transmitter and a first wireless signal receiver; a first wireless signal transmitter for transmitting a first wireless signal; a first wireless signal receiver for receiving a first wireless signal reflected by a second color coating in a wireless power receiving load; or/and, the position detection module further comprises a second wireless signal receiver; and the second wireless signal receiver is used for receiving the second wireless signal sent by the second wireless signal transmitter in the wireless power receiving load.

In some embodiments, the electrical device further comprises a first wireless communication module for communicating with a second wireless communication module in the wireless power receiving load.

The embodiment of the application provides a wireless power supply and heating multiplexing device, it is provided with resonance pulse acquisition module, can acquire wireless power supply and heating multiplexing module and be driven the resonance pulse that produces afterwards, control module confirms load information according to the parameter of resonance pulse, under the condition that the electrical equipment who has configured wireless power supply and heating multiplexing device is confirmed and is placed the heating load, control module control wireless power supply and heating multiplexing module realizes the heating function, need not the manual selection of user, simplify the required operation of user's use electrical equipment, improve user experience.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an electrical device provided in an embodiment of the present application.

Fig. 2 is a block diagram of a wireless power supply and heating multiplexing device according to an embodiment of the present application.

Fig. 3 is a circuit diagram of a power module provided in one embodiment of the present application.

Fig. 4 is a circuit diagram of a wireless power and heat multiplexing module according to an embodiment of the present application.

Fig. 5 is a circuit diagram of a resonant pulse acquisition module provided in one embodiment of the present application.

Fig. 6 is a pulse waveform diagram of an electrical device in a load detection phase according to an embodiment of the present application.

Fig. 7 is a schematic view of an electrical device according to another embodiment of the present application.

Fig. 8 is a schematic view of an electrical device according to another embodiment of the present application.

Fig. 9 is a schematic diagram of an electrical device according to another embodiment of the present application.

Fig. 10 is a schematic view of an electrical device according to another embodiment of the present application.

Fig. 11 is a schematic view of an electrical device according to another embodiment of the present application.

Fig. 12 is a schematic view of an electrical device according to another embodiment of the present application.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In order to better understand the solution of the present application, the following description will make clear and complete descriptions of the technical solution of the embodiment of the present application with reference to the accompanying drawings in the embodiment of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Referring to fig. 1, an embodiment of the present application provides a wireless power supply and heating multiplexing device 100 and an electrical apparatus 200 configured with the wireless power supply and heating multiplexing device 100. The electrical device 200 may be an electromagnetic heating device (e.g., an induction cooker) or a wireless charging device (e.g., a wireless charger). In the embodiment of the present application, the electrical apparatus 200 refers to an apparatus having both a wireless power supply function and a heating function. The wireless power supply and heating multiplexing device 100 is disposed in the electrical apparatus 200, and is used for switching between a wireless power supply function and a heating function.

In the embodiment of the present application, the electrical apparatus 200 includes a housing 210, a functional panel 230, and the wireless power and heat multiplexing device 100 described above. The functional panel 230 is disposed on an outer surface of the housing 210, and is configured to receive a control operation of a user, and the wireless power supply and heating multiplexing device 100 is disposed inside the housing 210 and electrically connected with the functional panel 230, so as to switch a circuit structure inside the wireless power supply and heating multiplexing circuit 100 according to different control operations received by the functional panel 230, that is, switch a wireless power supply function and a heating function.

In the present embodiment, the housing 210 includes a first housing 212 and a second housing 214, and the first housing 212 and the second housing 214 are covered with each other to form a housing space for the wireless power supply and heating multiplexing circuit 100, that is, the housing 210 plays a role in protecting and housing the components in the wireless power supply and heating multiplexing device 100. The first housing 212 is provided with a fixing structure therein, and the fixing structure is used for fixing a part of structures (for example, a circuit board) of the wireless power supply and heating multiplexing device 100. Specifically, the securing structure includes, but is not limited to, a securing slot, a clip (e.g., a resilient clip), and the like. The outer surface of the second housing 120 is provided with a mounting groove for mounting the functional panel 230.

The function panel 230 is mounted to the outer surface of the second housing 120, and in particular, the function panel 230 may include a plurality of function switches, for example, a power start switch, a wireless power function start switch, a heating function start switch, and the like. When the function panel 230 receives the control operation of the user, the control operation is converted into a corresponding electrical signal, and the electrical signal is sent to the wireless power supply and heating multiplexing device 100 electrically connected to the function panel 230.

Referring to fig. 2, the wireless power and heat multiplexing device 100 includes a power module 10, a wireless power and heat multiplexing module 30, a resonant pulse obtaining module 50, and a control module 70. The wireless power supply and heating multiplexing module 30 is connected with the power module 10 and is used for realizing a wireless power supply function and a heating function. The resonance pulse acquisition module 50 is respectively connected with the wireless power supply and heating multiplexing module 30 and the power supply module 10, and is used for acquiring resonance pulses generated by the wireless power supply and heating multiplexing module 30. The control module 70 is respectively connected with the wireless power supply and heating multiplexing module 30 and the resonance pulse acquisition module 50, and is used for determining load types according to parameters of the resonance pulse, wherein the load types comprise a heating load and a wireless power receiving load.

Parameters of the resonant pulse include, but are not limited to: time, phase, voltage, number of pulses, etc. of free resonance. In the embodiment of the present application, only the parameter of the resonant pulse is taken as an example to describe the pulse number. In the case where a load is placed on the electrical device 200 provided with the wireless power supply and heating multiplexing device 100, if the wireless power supply and heating multiplexing module 30 is pulsed, free resonance occurs in the resonant sub-module included therein. Under the condition that the load type is a heating load (such as a cooker), the loss of the harmonic oscillator module is large, the free resonance time is short, and the number of resonance pulses generated by the free resonance is small. In the case of a wireless power receiving load (such as a smart phone) or no load, the loss of the resonance coil is small, the free resonance time is long, and the number of resonance pulses generated by the free resonance is large.

The control module 70 may be a control chip, an integrated circuit board, or the like. In the embodiment of the present application, based on the above principle, the control module 70 may determine the load information according to the parameters of the resonant pulse. The load information includes whether the electrical device 200 places a load, and a load type. The load types include heating loads and wireless power receiving loads.

In some embodiments, the control module 70 determines that the appliance 200 is not loaded or that the appliance 200 is loaded with a wireless powered load if the number of resonant pulses is greater than or equal to a first threshold. The control module 70 determines that the electrical device 200 is placed with a load and the load type is a heating load if the number of resonant pulses is less than or equal to the second threshold. The first threshold and the second threshold are set according to experiments. Illustratively, the first threshold is 30 and the second threshold is 20.

In this embodiment of the present application, the wireless power supply and heating multiplexing device 100 is provided with the resonant pulse obtaining module 50, which can obtain the resonant pulse generated after the wireless power supply and heating multiplexing module 30 is driven, and the control module 70 determines the load information according to the parameters of the resonant pulse, and in the case that it is determined that the electrical equipment 200 configured with the wireless power supply and heating multiplexing device 100 is placed with the heating load, the control module 70 automatically controls the wireless power supply and heating multiplexing module 30 to implement the heating function, so that the manual selection of the user is not required, the operation required by the user to use the electrical equipment 200 is simplified, and the user experience is improved.

Each module in the wireless power and heat multiplexing device 100 provided in the embodiment of the present application is described below.

Referring to fig. 3, a circuit diagram of a power module 10 according to an embodiment of the present application is shown. The power module 10 provides power to the wireless power and heat multiplexing module 30, the resonant pulse acquisition module 50, and the control module 70.

In the embodiment of the present application, the power module 10 includes an ac power sub-module 110, a filter circuit sub-module 120, a rectifying circuit sub-module 130, a fourth inductor 140, and a ninth capacitor 150. The filter circuit sub-module 120 is connected between the ac power supply sub-module 110 and the rectifying circuit sub-module 130. After the fourth inductor 140 and the ninth capacitor 150 are connected in series, one end far away from the ninth capacitor 150 is connected to the voltage output end of the rectifying circuit sub-module 130, and the other end near to the ninth capacitor 150 is grounded. The common terminal of the fourth inductance 140 and the ninth capacitance 150 is connected to the wireless power and heat multiplexing module 30.

The ac power sub-module 110 is an ac power output module. Specifically, the ac power output by the ac power supply sub-module 110 has a voltage of 220V and a frequency of 50Hz. The filtering circuit sub-module 120 is connected to the ac power sub-module 110, and is configured to filter the ac power output by the ac power sub-module 110, thereby suppressing noise interference in the ac power. Specifically, in the embodiment shown in fig. 3, the filter circuit sub-module 120 includes a FUSE1 and a varistor CNR. The piezoresistors CNR are connected in parallel to two ends of the ac power supply sub-module 110, and are used for stabilizing the output voltage of the ac power supply sub-module 110, so as to avoid the occurrence of abnormal and excessively high voltage fluctuation of the output voltage. The FUSE1 is connected in series in a loop formed by the ac power supply sub-module 110 and the varistor CNR, and is used for fusing the branch circuit when the output current exceeds a specified value, thereby protecting the back-end load.

The rectifying circuit sub-module 130 is connected between the filtering circuit sub-module 120 and the wireless power supply and heating multiplexing module 30, and is used for rectifying the alternating current filtered by the filtering circuit sub-module 120, that is, converting the alternating current into direct current. In some embodiments, the rectifying circuit sub-module 130 may be implemented by a rectifying bridge, or a dedicated rectifying chip. Referring to fig. 3, the rectifying circuit sub-module 130 includes a rectifying bridge DR1. In some embodiments, the negative voltage output of rectifying circuit sub-module 130 is grounded.

The voltage output end of the rectifying circuit sub-module 130 is also connected in parallel with a fourth inductor 140 and a ninth capacitor 150. The fourth inductor 140 is a choke coil, and is used for preventing the passage of the ac component, so that the dc power supply is purer. The ninth capacitor 150 is a smoothing filter capacitor, and can further smooth the dc voltage output by the rectifying sub-module 130, so that the wireless power supply and heating multiplexing module 30 is more stable during operation.

Referring to fig. 4, a circuit diagram of a wireless power and heat multiplexing module 30 according to an embodiment of the present application is shown. The wireless power and heat multiplexing module 30 is used to switch between a heating function and a wireless power function.

In the embodiment of the present application, the wireless power and heat multiplexing module 30 includes a driving sub-module 310, a first switch sub-module 320, a resonance sub-module 330, a second switch sub-module 340, and a compensation sub-module 350. Wherein the drive sub-module 310 is connected to the first switch sub-module 320. The second switch sub-module 330 is connected to the resonator sub-module 340, the compensation sub-module 350, and the first switch sub-module 360, respectively. The harmonic oscillator module 340 is connected to the harmonic pulse acquisition module 50.

The driving sub-module 310 is used to provide a driving pulse signal to the second switching sub-module 320. In the present embodiment, the driving sub-module 310 includes a first pulse generator 311 and a second pulse generator 312.

The first switch sub-module 320 includes a first switch 321 and a second switch 322. The first switch 311 and the second switch 322 are connected to each other in series and then connected to both ends of the power module 10. Specifically, in the embodiment shown in fig. 4, the first switch 321 and the second switch 322 are power switch tubes, and the two power switch tubes are connected in series and then connected in parallel to the voltage output end of the rectifying circuit submodule 130. The power switch tube can be a power switch tube (Insulated Gate Bipolar Transistor, IGBT), and the specific model of the power switch tube is not limited in the application.

The first pulse generator 311 is connected to the first switch 321 for supplying a driving pulse signal to the first switch 321. The second pulse generator 312 is connected to the second switch 322 for supplying a driving pulse signal to the second switch 322. The duty cycle of the first pulse generator 311 and the second pulse generator 312 is the same. In the embodiment shown in fig. 4, the first pulse generator comprises PWM-H and the second pulse generator comprises PWM-L. Wherein, in the case that the PWM-H supplies the driving pulse signal, the initial level is a high level, and when matched, it is inverted to a low level. In contrast, in the case where the PWM-L supplies the driving pulse signal, the initial level is low, and when matching occurs, it is inverted to high.

The resonant sub-module 330 includes a first inductance 331, a third capacitance 332, and a fourth capacitance 333. The first inductor 331 is a coil disc, and can generate an alternating magnetic field, generate eddy currents at the bottom of a heating load by means of the alternating magnetic field, and achieve heating by means of the electrothermal effect of the eddy currents. The third capacitor 332 is an electric resonance capacitor, and forms an electric resonance network with the first inductor 331, so that the wireless power supply and heating module 30 realizes a wireless power supply function. The fourth capacitor 333 is a heating resonant capacitor, and forms a heating resonant network with the first inductor 331, so that the wireless power supply and heating module 30 realizes a heating function.

The second switch sub-module 340 includes a third switch 341, a fourth switch 342, and a fifth switch 343. The third switch 341 is used for switching on or off the electric resonance network. The fourth switch 342 is used to switch on or off the heating resonant network. The fifth switch 343 is used to switch on or off the resonance compensation network.

The compensation sub-module 350 includes a second inductance 351 and a fifth capacitance 352. The second inductor 351 and the fifth capacitor 352 form a resonance compensation network to improve system stability.

After the first inductor 331, the third capacitor 332, the second inductor 351, and the third switch 341 are sequentially connected in series, one end far away from the third switch 341 is connected to the resonant pulse acquisition module 50, and one end near the third switch 341 is connected to a common end of the first switch 321 and the second switch 322. After the fourth capacitor 333 and the fourth switch 342 are sequentially connected in series, one end far away from the fourth switch 342 is connected between the first inductor 331 and the third capacitor 332, and one end near the third switch 341 is connected to the common end of the first switch 321 and the second switch 322. After the fifth switch 343 and the fifth capacitor 352 are sequentially connected in series, one end far from the fifth switch 343 is connected between the second inductor 351 and the third capacitor 332, and one end near to the fifth switch 343 is grounded.

In the case where the third switch 341 and the fifth switch 343 are both in the closed state and the fourth switch 342 is in the open state, the first inductor 331 and the second inductor 351 are connected in parallel. The first inductance 331, the second inductance 351 and the third capacitance 332 constitute an LCCL half-bridge wireless power supply topology, i.e. in this case the wireless power supply and heating multiplexing module 30 implements a wireless power supply function.

In the case where the fourth switch 342 and the fifth switch 343 are both in the closed state and the third switch 341 is in the open state, the first inductor 331 and the fourth capacitor 333 are connected in series. The first inductance 331, the fourth capacitance 333LCC half-bridge heating topology, i.e. in this case the wireless power and heating multiplexing module 30 implements the heating function.

In some embodiments, the wireless power and heat multiplexing module 30 further includes an absorption sub-module 360. The absorption sub-module 360 includes a sixth capacitance 361 and a seventh capacitance 362. The sixth capacitor 361 and the seventh capacitor 362 are resonance absorption capacitors, and tuning of the resonant tank is realized by using the charge-discharge characteristics of the capacitors.

The sixth capacitor 361 is connected in parallel with the first switch 321; one end of the sixth capacitor 361 is connected to the power module 10, and the other end is connected to a common terminal of the first switch 321 and the second switch 322, the third switch 341 and the fourth switch 342. The seventh capacitor 362 is connected in parallel with the first switch 321; one end of the seventh capacitor 362 is grounded, and the other end is connected to the common terminal of the first switch 321 and the second switch 322, the third switch 341 and the fourth switch 342.

In some embodiments, the wireless power and heat multiplexing module 30 further includes a wireless power take-off sub-module 370. The wireless power take-off module 370 includes a signal receiving unit 371, a third inductor 372 and an eighth capacitor 373. One end of the signal receiving unit 371 is sequentially connected to the third inductor 372 and the eighth capacitor 373 to form a loop. The other end of the signal receiving unit 371 is connected to a load. The third inductor 372 is disposed opposite to the first inductor 331. In this case, the third inductor 372 and the first inductor 331 form a loosely coupled system, and high-power wireless transmission can be realized when the driving frequency is above 30 KHZ.

Referring to fig. 5, a circuit diagram of a resonant pulse acquisition module 50 according to one embodiment of the present application is shown. The resonant pulse acquisition module 50 includes a current sampling sub-module 510 and a pulse output sub-module 530.

The current sampling submodule 510 is respectively connected with the wireless power supply and heating multiplexing module 30 and the pulse output submodule 530, and is used for sampling the resonance current generated by the wireless power supply and heating multiplexing module 30 to obtain a sampling signal. The pulse output sub-module 530 is configured to output a resonance pulse according to the sampling signal.

In the embodiment of the present application, the current sampling submodule 510 includes a current transformer 511, a first resistor 512, a second resistor 513, a third resistor 514, a fourth resistor 515, a first capacitor 516, a second capacitor 517, a first diode 518, and a second diode 519. The current transformer 511 is an instrument for converting a primary side large current into a secondary side small current according to an electromagnetic induction principle, and is composed of a closed iron core and a winding. The fifth resistor 516 is a voltage dividing resistor.

The first diode 518 and the second diode 519 form a parallel circuit, a first end of the parallel circuit is connected to the power module 10, and a second end of the parallel circuit is grounded. The current transformer 511 is connected in parallel with the first resistor 512, the first capacitor 516, the parallel circuit, and the second capacitor 517 in order. A second resistor 513 is connected between the parallel loop and the first capacitor 516. A third resistor 514 is connected between the parallel loop and a second capacitor 517. A fourth resistor 515 is connected between the parallel loop and the power module 10.

The pulse output sub-module 530 includes a comparator 531 and a fifth resistor 532. The input end of the comparator 531 is connected in parallel with the second capacitor 517, and the output end of the comparator 531 is connected in series with the fifth resistor 532 and then connected to the power module 10. The comparator 531 is a circuit that compares an analog voltage signal with a reference voltage. The two inputs of the comparator 531 are analog signals, the output is binary signal 0 or 1, and when the difference of the input voltages increases or decreases and the sign is unchanged, the output thereof remains constant. The fifth resistor 532 is also a voltage dividing resistor.

In this embodiment, when the wireless power supply and heating multiplexing module 30 generates free resonance, after the current transformer 51 samples the resonance current, the comparator may output a resonance waveform according to the sampling signal, and then the control module 70 performs statistical analysis on the resonance waveform to obtain the resonance number, and then determines load information according to the resonance number.

The principle of operation of the resonant pulse acquisition module 50 will now be described in connection with fig. 6. Fig. 6 shows a pulse waveform diagram of an electrical device according to an embodiment of the present application in a load detection mode.

Referring to fig. 4 again, the fourth switch 342 in the wireless power and heat multiplexing module 30 is switched to the closed state, the third switch 341 and the fifth switch 343 are switched to the open state, and the wireless power and heat multiplexing device 100 enters the load detection mode.

First, during the discharging phase, the second pulse generator 312 sends at least one driving pulse signal to the second switch 322 to drive the second switch 322 to be turned on. The time at which the second pulse generator 312 transmits the driving pulse signal may be actually determined according to the number and period of the driving pulse signal, and may be any value greater than 1ms, such as 2ms. Referring to fig. 6, the second pulse generator 312 transmits 4 driving pulse signals to the second switch 322 in the discharging phase.

Next, in the driving phase, the second pulse generator 312 stops sending the driving pulse signal to the second switch 322, and the first pulse generator 311 sends a driving pulse signal to the first switch 321 to drive the first switch 321 to be turned on. The time at which the first pulse generator 311 transmits the driving pulse signal may be actually determined according to the period of the driving pulse signal, and may be any value greater than 1us and less than 50us, such as 30us. Referring again to fig. 6, the first pulse generator 311 sends a driving pulse signal to the first switch 321 during the driving phase. At this stage, the drive pulse signal is used to drive the wireless power and heat multiplexing module 30 to generate free resonance.

Finally, during the resonant pulse acquisition phase, the wireless power and heat multiplexing module 30 generates free resonance. The resonant pulse acquisition module 50 may acquire a resonant pulse. Referring again to fig. 6, the pulse output sub-module 530 outputs M resonant pulses in the resonant pulse acquisition phase without signal output in the discharge phase and the driving phase.

Referring to fig. 1 again, the electrical apparatus 200 includes a housing 210 and a wireless power supply and heating multiplexing device 100, where the wireless power supply and heating multiplexing device 100 is disposed in the housing 210.

Referring to fig. 7, a schematic diagram of an electrical device 200 according to another embodiment of the present application is shown. In the embodiment of the present application, the electrical apparatus 200 may further include a position detecting device 240, configured to detect whether the wireless power receiving load is accurately placed. The electrical device 200 can detect whether the wireless power receiving load is accurately placed by the following three structures.

In some embodiments, the housing 210 includes a first housing 212, the first housing 212 including a first surface 2121 and a second surface 2122 facing away from each other. The first surface 2122 is for placing a load. The second surface 2122 is disposed opposite the first inductance 331 in the wireless power and heat multiplexing device 100. The position detecting device 240 is disposed between the second surface 2122 and the first inductance 331.

Referring to fig. 8, the position detecting device 240 includes a magnetic sensor 241, and the magnetic sensor 241 is used for sensing a magnetic material 310 in the wireless power receiving load 300. In some embodiments, the magnetic sensor 241 is a hall sensor. In the embodiment of the present application, the magnetic material 310 is disposed on a designated surface of the wireless power receiving load 300, where the designated surface is a surface of the wireless power receiving load 300 opposite to the first surface 2121 during charging. The placement position of the wireless power receiving load 300 can be accurately detected by providing the magnetic sensor 241 in the electrical device 200.

Referring to fig. 9, the position detecting apparatus 240 further includes a first wireless signal transmitter 242 and a first wireless signal receiver 243. A wireless signal transmitter 241 is disposed between the second surface 2122 and the first inductor 331 for transmitting a first wireless signal. A first wireless signal receiver 242 is also disposed between the second surface 2122 and the first inductor 331 for receiving a first wireless signal reflected by the color coating 320 in the wireless power receiving load 300. In some embodiments, the first wireless signal transmitter 241 is an infrared signal transmitter. The first wireless signal receiver 242 is an infrared signal receiver and the first wireless signal is an infrared signal.

In this embodiment, the second color coating 320 is disposed on a designated surface of the wireless power receiving load 300, where the designated surface is a surface of the wireless power receiving load 300 opposite to the first surface 2121 during the charging process. After the first wireless signal emitter 241 emits the first wireless signal, the first wireless signal may be reflected by the second color coating 320 and then received by the first wireless signal receiver 242, and the placement position of the wireless power receiving load 300 is accurately detected according to the signal strength of the reflected first wireless signal received by the first wireless signal receiver 242.

Referring to fig. 10, the position detecting apparatus 240 further includes a second wireless signal receiver 244. The second wireless signal receiver 244 is disposed between the second surface 2122 and the first inductor 331 for receiving a second wireless signal transmitted by a second wireless signal transmitter in the wireless power receiving load. In this embodiment, the second wireless signal transmitter 330 is disposed on a designated surface of the wireless power receiving load 300, where the designated surface is a surface of the wireless power receiving load 330 opposite to the first surface 2121 during the charging process. After the second wireless signal transmitter 330 transmits the second wireless signal, the placement position of the wireless power receiving load 300 can be accurately detected according to the signal strength of the second wireless signal received by the second wireless signal receiver 244.

Referring to fig. 11, the position detecting device 240 further includes a color sensor 245. A color sensor 245 is disposed between the second surface 2122 and the first inductor 331 for sensing a second color coating 340 in the wireless power receiving load 300. In this embodiment, the designated surface of the wireless power receiving load 300 is provided with the first color coating 340, where the designated surface is a surface of the wireless power receiving load 330 opposite to the first surface 2121 during the charging process. The color sensor 245 can accurately detect the placement position of the wireless power receiving load 300 according to the sensed position of the first color coating 340.

According to the electrical equipment provided by the embodiment of the application, the position detection device 240 is arranged between the second surface 2122 and the first inductor 331, when the fact that the load information is not placed or the wireless power receiving load is placed is determined, the electrical equipment 200 can further determine specific conditions through the position detection device 240, for example, when the wireless power receiving load is detected through the position detection device 240, the fact that the electrical equipment 200 is placed with the wireless power receiving load is explained, at the moment, the control module 70 can further control the wireless power supply and heating multiplexing module to achieve the wireless power supply function, manual selection of a user is not needed, operation required by the user for using the electrical equipment is simplified, and user experience is improved.

Referring to fig. 12, the embodiment of the present application further provides an electrical apparatus 200, where the electrical apparatus 200 is provided with a first wireless communication module 260. The first wireless communication module 260 may be disposed opposite the second surface 2122. In this embodiment, the wireless power receiving load 300 is also provided with a second wireless communication module 340, and the electrical apparatus 200 communicates with the second wireless communication module 340 through the first wireless communication module 260, so as to determine whether the electrical apparatus 200 has a wireless power receiving load.

The foregoing is merely a preferred embodiment of the present application, and is not intended to limit the present application in any way, and although the present application has been described with reference to the preferred embodiment, it is not intended to limit the present application, and any person skilled in the art shall not depart from the scope of the present application, and make some changes or modifications to the above embodiments without departing from the scope of the present application.

Claims (13)

1. A wireless power and heat multiplexing device, comprising:

a power module;

the wireless power supply and heating multiplexing module is connected with the power supply module and is used for realizing a wireless power supply function and a heating function;

the resonance pulse acquisition module is respectively connected with the wireless power supply and multiplexing module and the power supply module and is used for acquiring resonance pulses generated by the wireless power supply and heating multiplexing module;

the control module is respectively connected with the wireless power supply and heating multiplexing module and the resonance pulse acquisition module and is used for determining load types according to parameters of the resonance pulses, wherein the load types comprise heating loads and wireless power receiving loads.

2. The apparatus of claim 1, wherein the resonant pulse acquisition module comprises a current sampling sub-module and a pulse output sub-module;

the current sampling submodule is respectively connected with the wireless power supply and heating multiplexing module and the pulse output submodule and is used for sampling the resonance current generated by the wireless power supply and heating multiplexing module to obtain a sampling signal; and the pulse output submodule is used for outputting the resonance pulse according to the sampling signal.

3. The apparatus of claim 2, wherein the device comprises a plurality of sensors,

the current sampling submodule comprises a current transformer, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a first diode and a second diode;

the first diode and the second diode form a parallel circuit, a first end of the parallel circuit is connected with the power module, and a second end of the parallel circuit is grounded;

the current transformer is connected with the first resistor, the first capacitor, the parallel circuit and the second capacitor in parallel in sequence;

the second resistor is connected between the parallel loop and the first capacitor;

the third resistor is connected between the parallel loop and the second capacitor;

the fourth resistor is connected between the parallel circuit and the power supply module;

the pulse output submodule comprises a comparator and a fifth resistor, wherein the input end of the comparator is connected with the second capacitor in parallel, and the output end of the comparator is connected with the fifth resistor in series and then connected to the power supply module.

4. The apparatus of claim 2, wherein the wireless power and heat multiplexing module comprises: the device comprises a driving sub-module, a first switch sub-module, a second switch sub-module and a resonance sub-module; a compensation sub-module;

the driving submodule is connected with the first switch submodule;

the second switch submodule is respectively connected with the resonance submodule, the compensation submodule and the first switch submodule;

the harmonic oscillator module is connected with the resonant pulse acquisition module.

5. The apparatus of claim 4, wherein the drive sub-module comprises a first pulse generator, a second pulse generator;

the first switch submodule comprises a first switch and a second switch, and the first switch and the second switch are connected in series and then connected to two ends of the power supply module; the first pulse generator is connected with the first switch; the second pulse generator is connected with the second switch;

the harmonic oscillator module comprises a first inductor, a third capacitor and a fourth capacitor;

the second switch submodule comprises a third switch, a fourth switch and a fifth switch;

the compensation sub-module comprises a second inductor and a fifth capacitor;

after the first inductor, the third capacitor, the second inductor and the third switch are sequentially connected in series, one end far away from the third switch is connected with the current sampling submodule, and one end near the third switch is connected with a common end of the first switch and the second switch;

after the fourth capacitor and the fourth switch are sequentially connected in series, one end far away from the fourth switch is connected between the first inductor and the third capacitor, and one end close to the third switch is connected with a common end of the first switch and the second switch;

after the fifth switch and the fifth capacitor are sequentially connected in series, one end far away from the fifth switch is connected between the second inductor and the third capacitor, and the other end close to the fifth switch is grounded.

6. The apparatus of claim 5, wherein the wireless power and heat multiplexing module further comprises an absorption submodule comprising a sixth capacitor and a seventh capacitor;

the sixth capacitor is connected with the first switch in parallel; one end of the sixth capacitor is connected to the power module, and the other end of the sixth capacitor is connected to a common end of the first switch and the second switch, the third switch and the fourth switch;

the seventh capacitor is connected with the second switch in parallel; one end of the seventh capacitor is grounded, and the other end of the seventh capacitor is connected to the common end of the first switch and the second switch, the third switch and the fourth switch.

7. The apparatus of claim 5, wherein the wireless power and heat multiplexing module further comprises a wireless power take-off module;

the wireless electronic taking module comprises a signal receiving unit, a third inductor and an eighth capacitor;

one end of the signal receiving unit is sequentially connected with the third inductor and the eighth capacitor to form a loop; the other end of the signal receiving unit is connected with a load;

the third inductor is arranged opposite to the first inductor.

8. The apparatus of any one of claims 1 to 7, wherein the power module comprises: the system comprises an alternating current power supply sub-module, a filter circuit sub-module, a rectifying circuit sub-module, a fourth inductor and a ninth capacitor;

the filter circuit submodule is connected between the alternating current power supply submodule and the rectifying circuit submodule;

after the fourth inductor and the ninth capacitor are connected in series, one end far away from the ninth capacitor is connected to the voltage output end of the rectifying circuit sub-module, and the end near to the ninth capacitor is grounded;

and the common end of the fourth inductor and the ninth capacitor is connected with the wireless power supply and heating multiplexing module.

9. An electrical device, comprising:

a housing; and

the wireless power and heat multiplexing device of any of claims 1-8 disposed within the housing.

10. The electrical device of claim 9, further comprising a location detection module for detecting a placement location of a wireless powered load;

the housing includes a first housing; the first shell comprises a first surface and a second surface which are mutually away from each other;

the first surface is used for placing a load; the second surface is arranged opposite to the first inductor in the wireless power supply and heating multiplexing device; the position detection module is arranged between the second surface and the first inductor.

11. The electrical device of claim 10, wherein the position detection module comprises a magnetic sensor for sensing magnetic material in the wireless power-receiving load; or/and (b)

The position detection module includes a color sensor for sensing a first color coating in the wireless power receiving load.

12. The electrical device of claim 10, wherein the location detection module comprises a first wireless signal transmitter and a first wireless signal receiver; the first wireless signal transmitter is used for transmitting a first wireless signal; the first wireless signal receiver is used for receiving the first wireless signal reflected by the second color coating in the wireless power receiving load; or/and (b)

The position detection module further comprises a second wireless signal receiver;

the second wireless signal receiver is used for receiving a second wireless signal sent by a second wireless signal transmitter in the wireless power receiving load.

13. The electrical device of any one of claims 9-12, further comprising a first wireless communication module for communicating with a second wireless communication module in the wireless power receiving load.

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