Small home appliance, and method for performing communication in small home appliance
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Solution Overview
Problem
In small home appliances like electric kettles, the proximity of coils for power reception and communication leads to magnetic field interference, deteriorating communication performance.
Innovation Solution
A method where a single coil is used for both power reception and communication, utilizing a zero crossing interrupt signal to determine a communication period and control the communication process, allowing for efficient NFC communication without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate coils are used for power reception and communication in small home appliances, then both functions can be performed independently, but magnetic field interference occurs due to close proximity, deteriorating communication performance
Solution Approach 1:
The patent combines the power reception coil and communication coil into a single integrated coil structure. This merging eliminates the magnetic field interference that occurs between separate coils placed close together in small home appliances, while still enabling both wireless power reception and NFC communication functions to operate independently without mutual interference.
Solution Approach 2:
The integrated coil serves multiple functions: it acts as both a power reception coil for wireless charging and a communication coil for NFC operations. This multi-functional design reduces the number of components needed in small home appliances while maintaining both power and communication capabilities without the interference problems of separate coils.
2Adaptability or versatility
If separate coils for power reception and communication are used, then both functions are independent, but the space required in the appliance increases
Solution Approach 1:
By merging the power reception coil and communication coil into a single integrated structure, the patent significantly reduces the total space required for coils in small home appliances. The integrated design allows both functions to share the same physical space rather than requiring separate areas for each coil.
Solution Approach 2:
The integrated coil performs both power reception and communication functions, eliminating the need for separate coils and thereby reducing the overall area occupied by coil components in the appliance while maintaining functional independence through time-division multiplexing.
3Area of stationary object
If a single coil is used for both power reception and communication, then space is reduced and the appliance is miniaturized, but coil interference may occur
Solution Approach 1:
The patent employs periodic action by time-division multiplexing the single coil between power reception and communication functions. The controller alternates between receiving wireless power and performing NFC communication at different time intervals, ensuring that both functions operate independently without mutual interference despite using the same physical coil.
Solution Approach 2:
The system dynamically switches the single coil between two operational modes: power reception mode and communication mode. This dynamic switching is controlled by a controller that manages the timing and sequence of operations, allowing the coil to adapt its function based on current operational requirements without causing interference.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution eliminates communication performance deterioration due to coil interference, reduces space requirements, and miniaturizes the appliance while maintaining effective power and communication functionality.
Implementation Method 1
a coil for power reception and communication; and a controller which receives wireless power from the wireless power transmission device by using the coil
Implementation Method 2
The coil for power reception and communication may receive power, and the antenna coil for communication may, for example, be an antenna for a near field communication
Data Source
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AI summary
A small home appliance (100) according to the present invention includes a coil for receiving power and communicating, a communication unit (120) which uses the coil to wirelessly communicate with a wireless power transmission device (200), and a controller (110) that uses the coil to receive wireless power from the wireless power transmission device (200), receives a zero crossing interrupt signal from the wireless power transmission device (200), and determines a communication period of the communication unit (120) according to the zero crossing interrupt signal.