Control method of wireless power transmission system, household appliance, and storage medium

Abstract

The application provides a control method of a wireless power transmission system, a household appliance and a storage medium. The method comprises the following steps: when the primary side control circuit detects that the appliance provided with the secondary side control circuit exists, if the communication data sent by the secondary side control circuit is received, it is judged whether it is the first communication connection, if yes, the identification code of the secondary side control circuit in the communication data is obtained and stored; the load working mode is entered, and the primary side control circuit performs power supply control according to the communication data; when the load working mode is entered, the primary side control circuit only processes the communication data corresponding to the stored identification code. The control method of the wireless power transmission system can avoid control interference when multiple products are operated, and improve the reliability of the products in operation.

Description

Technical Field

[0001] This invention relates to the field of wireless power transmission technology, specifically to a control method for a wireless power transmission system, a household appliance using the control method of the wireless power transmission system, and a computer-readable storage medium using the control method of the wireless power transmission system. Background Technology

[0002] With the advancement of social technology, research on wireless power transfer technology has developed rapidly in line with the trend of the times. Compared with the traditional contact-based power transfer method used in household appliances, the flexibility, safety, and near-digital and intelligent characteristics of wireless power transfer technology make it the future direction of power supply technology for household appliances. Unlike contact-based power transfer, the power transmission end and the power receiving end of wireless power supply are insulated. This non-electrically direct power transfer method gives electrical equipment the following advantages: it eliminates the constraints of cables, resulting in a cleaner work surface, improved user-friendliness, and effectively avoids hazards such as leakage, sparks, and wear, thus improving the safety of appliance use.

[0003] Traditional heating methods use the combustion of combustible materials, which leads to environmental pollution and energy waste. Induction heating has subsequently gained popularity in industrial heating due to its significant advantages over traditional open-flame heating, including higher heating efficiency, safety, and cleaner operation. Responding to societal development, induction heating has been extended to household appliances. For example, traditional induction cookers utilize wireless power transfer. However, existing wireless power transfer products for home appliances cannot meet the growing demands of users.

[0004] An existing wireless power transmission device includes a primary-side control circuit and a secondary-side control circuit. The primary-side control circuit supplies power to the secondary-side control circuit via a coil. The primary-side and secondary-side control circuits communicate via a wireless communication circuit, and the primary-side control circuit can control the power supply according to the control signals from the secondary-side control circuit. However, when the wireless power transmission device communicates with the secondary-side electrical appliances, if multiple wireless power transmission devices and electrical appliances are operating simultaneously, cross-interference of signals can easily occur, leading to control malfunctions.

[0005] Therefore, a more optimized control scheme for wireless power transmission devices is needed. Summary of the Invention

[0006] The first objective of this invention is to provide a control method for a wireless power transmission system that can avoid control interference during the operation of multiple products and improve the reliability of product operation.

[0007] The second objective of this invention is to provide a household appliance that can avoid control interference during the operation of multiple products and improve the reliability of product operation.

[0008] A third objective of this invention is to provide a computer-readable storage medium that can avoid control interference during the operation of multiple products and improve the reliability of product operation.

[0009] To achieve the aforementioned first objective, the control method for the wireless power transmission system provided by the present invention includes: when the primary-side control circuit detects the presence of an appliance equipped with a secondary-side control circuit, if it receives communication data sent by the secondary-side control circuit, it determines whether it is the first communication connection; if so, it acquires and stores the identification code of the secondary-side control circuit in the communication data; it enters a load operating mode, and the primary-side control circuit performs power supply control according to the communication data; when entering the load operating mode, the primary-side control circuit only processes the communication data corresponding to the stored identification code.

[0010] As can be seen from the above scheme, the control method of the wireless power transmission system of the present invention stores the identification code of the secondary control circuit when the primary control circuit receives the communication data of the secondary control circuit for the first communication. After entering the load working mode, the primary control circuit only processes the communication data corresponding to the stored identification code, thereby shielding the communication data of other secondary control circuits, avoiding control interference when multiple products are running, and thus improving the reliability of product operation.

[0011] In a further scheme, the communication data includes: receiver voltage, receiver current, receiver status, receiver set power, receiver actual power, and data verification. Among them, the receiver voltage is the current voltage of the secondary control circuit, the receiver current is the current current of the secondary control circuit, the receiver status is the current operating status of the secondary control circuit, the receiver status includes an identification code, the receiver set power is the required set power of the secondary control circuit, the receiver actual power is the current power of the secondary control circuit, and the data verification is the verification code of the secondary control circuit.

[0012] Therefore, the communication data includes: receiver voltage, receiver current, receiver status, receiver set power, receiver actual power, and data verification. This allows the primary-side control circuit to control the power supply accordingly based on the received receiver voltage, receiver current, receiver status, receiver set power, and receiver actual power. At the same time, the data verification results can be used to confirm whether the communication data is qualified.

[0013] In a further proposed scheme, both the receiver voltage and receiver current occupy two bytes.

[0014] Therefore, both the receiving voltage and the receiving current occupy two bytes, which ensures that the receiving voltage and current data have sufficient space and guarantees the accuracy of the current and voltage data.

[0015] In a further embodiment, the step of obtaining and storing the identification code of the secondary control circuit in the communication data includes: when the identification codes in the communication data obtained consecutively for a preset number of times are all the same identification code, the identification code is stored.

[0016] Therefore, when the identification code in the communication data obtained in a preset number of consecutive times is the same identification code, it indicates that the secondary control circuit and the primary control circuit are communicating stably. At this time, storing the identification code can ensure the stability of communication data transmission.

[0017] In a further embodiment, after entering the load operating mode, the process further includes: when a power supply stop signal is received, the primary-side control circuit executes a power supply stop command, and the secondary-side control circuit performs a stop operation after detecting that the current is lower than a preset current threshold.

[0018] Therefore, when a power supply stop signal is received, the secondary control circuit stops the operation after detecting that the current is lower than the preset current threshold, which can avoid the problem of current overshoot in the primary control circuit and ensure the safety of the circuit.

[0019] In a further embodiment, the steps for obtaining a power supply stop signal include: obtaining a power supply stop signal when a stop button command is received; obtaining a power supply stop signal when a preset current threshold protection condition or a preset voltage threshold protection condition is met; or obtaining a power supply stop signal when the primary control circuit detects that the appliance has been lifted.

[0020] Therefore, it can be seen that power outage signals can be obtained through various methods to ensure the safe operation of equipment.

[0021] In a further embodiment, after entering the load operating mode, the following steps are also included: when the primary control circuit detects that the appliance has been lifted, the stored previous identification code is cleared, and the circuit waits for the new secondary control circuit to connect.

[0022] Therefore, when the primary control circuit detects that the appliance has been lifted, it deletes the previously stored identification code and waits for the new secondary control circuit to connect, thus avoiding interference caused by multiple identification codes.

[0023] In a further embodiment, in standby mode and when no appliance is detected being lifted, if the primary control circuit detects that the voltage of the secondary control circuit is less than a preset voltage value, it provides a pulse voltage to the secondary control circuit.

[0024] Therefore, in standby mode, and when no appliance is detected to be lifted, the timing of providing pulse voltage to the secondary control circuit by determining the preset voltage value can ensure the continuous standby power-on function of the secondary control circuit, while saving energy.

[0025] To achieve the second objective of the present invention, the present invention provides a household appliance including a processor and a memory, the memory storing a computer program, which, when executed by the processor, implements the steps of the control method of the wireless power transmission system described above.

[0026] To achieve the third objective of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a controller, implements the steps of the control method for the wireless power transmission system described above. Attached Figure Description

[0027] Figure 1 This is a circuit diagram of a wireless power transmission system that applies the control method of the wireless power transmission system of the present invention.

[0028] Figure 2 This is a flowchart of an embodiment of the control method for the wireless power transmission system of the present invention.

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0030] Example of a control method for a wireless power transmission system:

[0031] The control method of the wireless power transmission system in this embodiment is applied to an application program for the wireless power transmission system, used for power supply control of the wireless power transmission system. In this embodiment, as... Figure 1 As shown, the wireless power transfer system includes a primary-side control circuit 1 and a secondary-side control circuit 2. The primary-side control circuit 1 supplies power to the receiving coil 21 of the secondary-side control circuit 2 through a transmitting coil 11. The primary-side control circuit 1 and the secondary-side control circuit 2 communicate through a primary-side wireless communication circuit 12 and a secondary-side wireless communication circuit 22. The primary-side control circuit 1 and the secondary-side control circuit 2 can use known circuits, which will not be described in detail here. The wireless power transfer system is applied to household appliances. For example, the primary-side control circuit 1 is used in an induction cooker, and the secondary-side control circuit 2 is used in a heating appliance. The heating appliance is equipped with an induction heating circuit 23 and a pure electric load heating circuit 24. The induction heating circuit 23 can perform IH heating control.

[0032] like Figure 2As shown, in this embodiment, the control method of the wireless power transmission system first executes step S1 during operation to determine whether the primary-side control circuit 1 detects the presence of an appliance equipped with a secondary-side control circuit 2. In the start-up state, the primary-side control circuit 1 continuously sends pulse voltages to the transmitting coil 11 to detect whether an appliance equipped with a secondary-side control circuit 2 has entered the detection range of the transmitting coil 11. Detecting appliances equipped with a secondary-side control circuit 2 using pulse voltages is a technique known to those skilled in the art and will not be elaborated here. For example, when the primary-side control circuit 1 is applied to an induction cooker and the secondary-side control circuit 2 is applied to a cookware appliance, the primary-side control circuit 1 can send a cookware detection pulse voltage to detect the cookware.

[0033] If the primary control circuit 1 does not detect the presence of an appliance equipped with the secondary control circuit 2, it continues to execute step S1 for continuous detection. If the primary control circuit 1 detects the presence of an appliance equipped with the secondary control circuit 2, it executes step S2 to determine whether it has received communication data sent by the secondary control circuit. After detecting the secondary control circuit 2, the primary control circuit 1 supplies power to the secondary control circuit 2, and the secondary control circuit 2 sends communication data back to the primary control circuit 1 for power supply control.

[0034] In this embodiment, the communication data includes: receiver voltage, receiver current, receiver status, receiver set power, receiver actual power, and data verification. The receiver voltage is the current voltage of the secondary control circuit; the receiver current is the current current of the secondary control circuit; the receiver status is the current operating state of the secondary control circuit, including an identification code; the receiver set power is the required set power of the secondary control circuit; the receiver actual power is the current power of the secondary control circuit; and the data verification is the checksum of the secondary control circuit. The receiver voltage, receiver current, receiver status, receiver set power, receiver actual power, and data verification are set sequentially from low to high bytes. In this embodiment, both the receiver voltage and receiver current occupy two bytes. Specifically, the preset communication format of the communication data is shown in the table below:

[0035]

[0036] If no communication data is received from the secondary control circuit in a preset communication format, step S2 continues to be executed to continuously detect the communication data of the secondary control circuit 2. If communication data is received from the secondary control circuit 2 in a preset communication format, step S3 is executed to determine whether it is the first communication connection. During communication, the receiver status in the communication data carries the identification code of the secondary control circuit 2. The primary control circuit 1 identifies the identification code to determine whether it is stored, thus confirming whether it is the first communication connection. If the identification code is not stored, it is the first communication connection.

[0037] If it is confirmed to be the first communication connection, then step S4 is executed to obtain and store the identification code of the secondary control circuit 2 in the communication data. When the primary control circuit 1 and the secondary control circuit 2 establish their first communication connection, in order to lock the secondary control circuit 2 and prevent signal interference from other secondary control circuits 2, it is necessary to obtain and store the identification code of the secondary control circuit 2 in the communication data for subsequent communication control.

[0038] In this embodiment, the step of acquiring and storing the identification code of the secondary control circuit 2 in the communication data includes: storing the identification code when the identification codes in the communication data acquired consecutively for a preset number of times are all the same identification code. The preset number of times can be pre-set according to the implementation data. Each piece of communication data contains an identification code. The identification codes in the communication data acquired consecutively for a preset number of times are judged, and the identification code is only stored when the identification codes in the consecutive preset number of times are all the same, thus ensuring the stability of communication data transmission.

[0039] After acquiring and storing the identification code of the secondary control circuit 2 in the communication data, step S5 is executed to enter the load working mode. The primary control circuit 1 then controls the power supply according to the communication data. Once in load working mode, the primary control circuit 1 can control the power supply according to the received receiver voltage, receiver current, receiver status, receiver set power, and receiver actual power, ensuring the power supply meets the power requirements of the secondary control circuit 2. For example, the primary control circuit 1 is used in an induction cooker, and the secondary control circuit 2 is used in a cookware. The cookware is equipped with an induction heating circuit 23 and a pure electric load heating circuit 24. The heating circuit 23 can perform IH heating control. The primary control circuit 1 determines whether IH heating or DC heating is required and then supplies power according to the IH or DC heating control mode.

[0040] In this embodiment, when entering the load operating mode, the primary-side control circuit 1 only processes the communication data corresponding to the stored identification code. After entering the load operating mode, the secondary-side control circuit 2 continuously sends communication data to the primary-side control circuit 1 so that the primary-side control circuit 1 can perform power supply control. In order to avoid signal interference from other secondary-side control circuits 2, after entering the load operating mode, the primary-side control circuit 1 only processes the subsequent communication data corresponding to the currently stored identification code, and can filter out other similar signals.

[0041] If, during step S3, it is confirmed that this is not the first communication connection, then step S5 is executed, and the primary-side control circuit 1 controls the power supply according to the communication data. The primary-side control circuit 1 controls the power supply accordingly based on the received end voltage, end current, end status, set power, and actual power of the end in the received communication data.

[0042] In this embodiment, after entering the load operating mode, the process further includes: when a power supply stop signal is received, the primary-side control circuit 1 executes a power supply stop command, and the secondary-side control circuit 2 stops operation after detecting that the current is lower than a preset current threshold. The preset current threshold is pre-set based on experimental data. In the load operating mode, when a power supply stop signal is received, the primary-side control circuit 1 executes a power supply stop command, stopping power supply to the secondary-side control circuit 2. However, residual current remains when the primary-side control circuit 1 is de-energized. If not properly managed, current overshoot can easily occur. Therefore, the secondary-side control circuit 2 stops operation after detecting that the current is lower than the preset current threshold, thus guiding the residual current and preventing current overshoot in the primary-side control circuit 1, ensuring circuit safety.

[0043] In this embodiment, the steps for obtaining a power supply stop signal include: obtaining a power supply stop signal when a stop button command is received; obtaining a power supply stop signal when a preset current threshold protection condition or a preset voltage threshold protection condition is met; or obtaining a power supply stop signal when the primary-side control circuit 1 detects that the appliance has been lifted. When the user needs to stop heating, a power supply stop command can be sent via a button. The preset current threshold protection condition and the preset voltage threshold protection condition are preset protection conditions set by the program developers to protect the safety of the appliance. When the primary-side control circuit 1 detects that the appliance has been lifted, it indicates that the appliance has left the detection range of the coil and no further power supply is required.

[0044] In this embodiment, after entering the load operating mode, the method further includes: when the primary-side control circuit 1 detects that the appliance has been lifted, deleting the previously stored identification code and waiting for the new secondary-side control circuit 2 to connect. When the primary-side control circuit 1 detects that the appliance has been lifted, it indicates that the appliance has left the detection range of the coil. The previously stored identification code is cleared, and the new secondary-side control circuit 2 is waited for connection to avoid interference caused by multiple identification codes.

[0045] In this embodiment, in standby mode and when no appliance is detected being lifted, if the primary-side control circuit 1 detects that the voltage of the secondary-side control circuit 2 is less than a preset voltage value, it provides a pulse voltage to the secondary-side control circuit 2. By determining the timing of providing a pulse voltage to the secondary-side control circuit 2 based on the preset voltage value in standby mode and when no appliance is detected being lifted, the primary-side control circuit 1 can ensure the continuous standby power-on function of the secondary-side control circuit 2 while saving energy.

[0046] As can be seen from the above, when the primary-side control circuit 1 receives the communication data of the secondary-side control circuit 2 during its first communication, the control method of the wireless power transmission system of the present invention stores the identification code of the secondary-side control circuit 2. After entering the load working mode, the primary-side control circuit 1 only processes the communication data corresponding to the stored identification code, thereby shielding the communication data of other secondary-side control circuits 2, avoiding control interference when multiple products are running, and thus improving the reliability of product operation.

[0047] Example of household appliances:

[0048] The household appliance in this embodiment includes a controller, which executes a computer program to implement the steps in the control method embodiment of the wireless power transmission system described above.

[0049] For example, a computer program can be divided into one or more modules, one or more of which are stored in memory and executed by a controller to perform the present invention. One or more modules can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in a household appliance.

[0050] Home appliances may include, but are not limited to, controllers and memory. Those skilled in the art will understand that home appliances may include more or fewer components, or combinations of certain components, or different components; for example, home appliances may also include input / output devices, network access devices, buses, etc.

[0051] For example, a controller can be a Central Processing Unit (CPU), or other general-purpose controllers, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose controller can be a microcontroller or any conventional controller. The controller is the control center of a home appliance, connecting all parts of the appliance through various interfaces and wiring.

[0052] The memory can be used to store computer programs and / or modules. The controller implements various functions of the home appliance by running or executing the computer programs and / or modules stored in the memory, and by calling the data stored in the memory. For example, the memory may mainly include a program storage area and a data storage area, wherein the program storage area may store the operating system, at least one application program required for a function, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0053] Examples of computer-readable storage media:

[0054] If the modules integrated into the home appliances in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the control method embodiments of the above wireless power transmission system can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a controller, it can implement the steps of the control method embodiments of the above wireless power transmission system. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The storage medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0055] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A control method for a wireless power transmission system, the system comprising a primary-side control circuit and a secondary-side control circuit, wherein the primary-side control circuit supplies power to the secondary-side control circuit via a coil, and the primary-side control circuit and the secondary-side control circuit communicate via a wireless communication circuit; characterized in that: The method includes: When the primary-side control circuit detects the presence of an appliance equipped with the secondary-side control circuit, if it receives communication data sent by the secondary-side control circuit, it determines whether it is the first communication connection. If so, it obtains and stores the identification code of the secondary-side control circuit in the communication data. The primary-side control circuit stores only one identification code at any given time. Upon entering the load operating mode, the primary-side control circuit controls the power supply according to the communication data; When entering the load working mode, the primary-side control circuit only processes the communication data corresponding to the currently stored identification code, and blocks the communication data of other secondary-side control circuits. When the primary control circuit detects that the appliance has been lifted, it deletes the previously stored identification code and waits for a new secondary control circuit to connect.

2. The control method for the wireless power transmission system according to claim 1, characterized in that: The communication data includes: receiver voltage, receiver current, receiver status, receiver set power, receiver actual power, and data verification. The receiver voltage is the current voltage of the secondary control circuit; the receiver current is the current current of the secondary control circuit; the receiver status is the current operating state of the secondary control circuit, including the identification code; the receiver set power is the required set power of the secondary control circuit; the receiver actual power is the current power of the secondary control circuit; and the data verification is the checksum of the secondary control circuit.

3. The control method for the wireless power transmission system according to claim 2, characterized in that: The receiving voltage and the receiving current each occupy two bytes.

4. The control method for the wireless power transmission system according to claim 1, characterized in that: The step of acquiring and storing the identification code of the secondary control circuit in the communication data includes: If the identification code in the communication data obtained consecutively for a preset number of times is the same identification code, then the identification code is stored.

5. The control method for the wireless power transmission system according to any one of claims 1 to 4, characterized in that: After entering the load operation mode, the steps also include: When a power supply stop signal is received, the primary-side control circuit executes a power supply stop command, and the secondary-side control circuit performs a stop operation after detecting that the current is lower than a preset current threshold.

6. The control method for the wireless power transmission system according to claim 5, characterized in that: The step of obtaining the power supply stop signal includes: When a stop button command is received, the stop power supply signal is received; or When the preset current threshold protection condition or the preset voltage threshold protection condition is met, the power supply stop signal is obtained; or When the primary control circuit detects that the appliance is lifted, it receives the power supply stop signal.

7. The control method for the wireless power transmission system according to any one of claims 1 to 4, characterized in that: Also includes: In standby mode, and when no appliance is detected to be lifted, if the primary control circuit detects that the voltage of the secondary control circuit is less than a preset voltage value, it provides a pulse voltage to the secondary control circuit.

8. A household appliance, comprising a processor and a memory, characterized in that: The memory stores a computer program that, when executed by the processor, implements the steps of the control method for the wireless power transmission system as described in any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the controller, it implements the steps of the control method for the wireless power transmission system as described in any one of claims 1 to 7.

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