Ceiling Fan Wall Control Through Live-Wire Signal Modulation
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Solution Overview
Problem
Conventional ceiling fans with pull chain switches are inconvenient to operate and adding a wall control device complicates wiring and installation.
Innovation Solution
A ceiling fan device with a wall control-compatible pull chain switch that includes a wall control module group, pull chain switch assembly, sampling and control module group, and drive module, allowing for simple wiring and stable control through a half-bridge signal generation and decoding system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wall control device is added to a ceiling fan, then ease of operation is improved, but device complexity increases due to complex wiring
Solution Approach 1:
The control system is designed to accept multiple types of control inputs (wall control signals and pull chain signals) through a unified interface. The sampling module can identify and process different control commands through the same live wire, making the system universal in accepting various control methods without requiring separate wiring paths for each control type.
Solution Approach 2:
The patent introduces a signal modulation module and a sampling module as intermediaries between the control inputs and the drive module. These intermediary components translate both wall control signals and pull chain signals into a unified control format that the drive module can process, eliminating the need for complex separate wiring paths for different control types.
2Ease of operation
If a wall control device is added to a ceiling fan, then ease of operation is improved, but ease of manufacture deteriorates due to difficulty in arrangement
Solution Approach 1:
The control system uses a universal live wire connection that can carry both power and control signals. This allows the same wiring path to serve multiple functions (power supply and control signal transmission), greatly simplifying the installation and arrangement process while maintaining the ability to support both wall control and pull chain operation modes.
Solution Approach 2:
The patent merges the power wire and control signal wire into a single live wire connection. By combining these functions into one wire, the system reduces the number of wires needed and simplifies the overall wiring structure, making installation easier while still supporting multiple control methods.
3Device complexity
If conventional pull chain switch is used, then device complexity is reduced, but ease of operation deteriorates due to inconvenience
Solution Approach 1:
The control system is designed to universally accept both simple pull chain inputs and more sophisticated wall control inputs through the same simplified wiring structure. This allows the system to maintain wiring simplicity while providing the operational convenience of wall control when needed.
Solution Approach 2:
The system dynamically adapts to different control methods. The sampling module can identify whether a control signal comes from a pull chain or a wall control device and process it appropriately. This dynamic capability allows the system to maintain simple wiring while providing enhanced operational convenience when wall control is used.
Data Source
AI summary
A ceiling fan device with a wall control-compatible pull chain switch is disclosed, including a wall control module group, a pull chain switch assembly, a sampling and control module group, a drive module, and a fan motor. The wall control module group includes an operating module and a signal modulation module. The operating module is configured to be connected to a live wire, the signal modulation module is connected to the operating module, and operation on the operating module enables the signal modulation module to output a first control command. Operation on the pull chain switch assembly enables a second control command to be output. The sampling and control module group is connected to the drive module to drive the fan motor to operate by means of the drive module according to at least one of the first control command and the second control command.