Wireless Power and Bidirectional Data Link for Home Appliance Doors
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Solution Overview
Problem
Existing home appliances face challenges in providing wireless power transmission and bidirectional communication between circuit units, particularly in designs where circuit components are attached to doors that can be opened and closed, leading to wire deterioration and aesthetic issues.
Innovation Solution
Implementing a wireless power transmission scheme using a first circuit unit with a converter, a coil, and a modulator/demodulator for transmitting DC power, and a second circuit unit with a coil and a modulator/demodulator for receiving power, enabling bidirectional communication through time-division directional data communication and load modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If circuit components are attached to doors that can be opened and closed, then the home appliance can provide communication functionality, but wire deterioration and aesthetic issues occur
Solution Approach 1:
The patent replaces the mechanical wire-based communication system with a wireless communication system using electromagnetic fields. The transmitter unit and receiver unit communicate without physical connections, eliminating wire abrasion and deterioration issues while maintaining communication functionality between circuit boards attached to movable doors.
2Reliability
If wireless power transmission is implemented, then wire abrasion is prevented, but additional antennas and components are required
Solution Approach 1:
The patent combines power transmission and data communication functions into a single wireless communication system. The same transmitter and receiver units that enable wireless power transmission also handle bidirectional data communication, eliminating the need for separate antennas and reducing overall system complexity.
Solution Approach 2:
The wireless communication units are designed to perform multiple functions: wireless power transmission and bidirectional data communication. This multi-functionality allows the system to replace both power cables and data communication wires, reducing component count while maintaining reliability.
3Ease of operation
If bidirectional communication is implemented between circuit units, then operational control is improved, but communication interference may occur
Solution Approach 1:
The patent implements time-division multiplexing for bidirectional communication, where the transmitter and receiver operate in alternating time slots. During the first time slot, the first circuit unit transmits data to the second unit; during the second time slot, the second unit transmits data back. This periodic action prevents signal interference while enabling full duplex communication.
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 reduces manufacturing costs, increases operation efficiency, and prevents wire abrasion and aesthetic deterioration by allowing wireless communication without additional antennas, enhancing the functionality and durability of home appliances.
Implementation Method 1
a first coil configured to wirelessly transmit the DC power
Implementation Method 2
a first modulator/demodulator configured to wirelessly transmit the DC power generated by the converter using the first coil, and a second modulator/demodulator configured to convert the wireless power received from the second coil
Data Source
AI summary
A home appliance is disclosed, including a first circuit unit including a converter configured to convert an Alternating Current (AC) power into a Direct Current (DC) power, a first coil, a first modulator/demodulator configured to wirelessly transmit the DC power generated by the converter using the first coil, and a first controller configured to control the first modulator/demodulator, and a second circuit including a second coil configured to receive a wireless power transmitted by the first circuit unit, a second modulator/demodulator configured to convert the wireless power received from the second coil, a rectifier configured to rectify an AC power generated by the second modulator/demodulator, and a second controller configured to control operation of the second modulator/demodulator, wherein the first modulator/demodulator and the second modulator/demodulator perform bidirectional time-division data communication.