Ceiling Fan RF-WiFi Control for Separate Light and Speed Operation
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Solution Overview
Problem
Existing ceiling fan and light control systems often require multiple wired switches, which can be unsightly and pose safety hazards, and lack advanced features like variable lighting and fan speed control, especially in installations where wiring is difficult or costly to run.
Innovation Solution
The use of both RF and WiFi interfaces in a fan device allows for remote control and scheduling of fan and light functions without the need for external network connections, using a wall-mounted controller to transmit RF signals and a WiFi router for local control, enabling features like variable lighting and fan speed control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple wired switches are used to control fan and light separately, then separate control of fan motor and light is achieved, but the installation becomes unsightly and poses safety hazards
Solution Approach 1:
The patent replaces mechanical wired switches with wireless control systems (RF and WiFi interfaces) that communicate control signals wirelessly to the fan device. This eliminates the need for physical wall switches, removing safety hazards from dangling cords and unsightly wiring while maintaining separate control capability through wireless remote controllers or mobile devices
Solution Approach 2:
The patent introduces wireless communication interfaces (RF receiver and WiFi module) as intermediaries between the user and the fan device. These intermediaries transmit control signals wirelessly, allowing separate control of fan and light functions without requiring physical wiring changes or visible wall switches
2Ease of operation
If pull cords are included for separate control, then fan and light can be controlled separately without multiple wall switches, but safety issues and unsightly appearance worsen
Solution Approach 1:
The patent replaces mechanical pull cord switches with wireless control systems. The RF and WiFi interfaces receive control signals wirelessly, eliminating the need for physical pull cords that can dangle and create safety hazards. Control is achieved through wireless remote controllers or mobile devices, maintaining separate control capability while removing safety issues
3Adaptability or versatility
If variable lighting and fan speed control are implemented, then advanced control features are provided, but the complexity of wiring and control systems increases
Solution Approach 1:
The patent replaces complex wired control systems with wireless communication interfaces (RF and WiFi). The wireless interfaces receive control signals for variable lighting and fan speed without requiring additional wiring. The fan device includes control circuits that process wireless commands to adjust LED brightness and fan motor speed, providing advanced features while minimizing wiring complexity
Solution Approach 2:
The patent implements a universal wireless control system that handles multiple functions (fan on/off, light on/off, fan speed control, light dimming) through a single RF and WiFi interface infrastructure. This multi-functional approach provides advanced control features without requiring separate wiring for each control function, reducing overall system complexity
4Loss of energy
If scheduling control is implemented without external network connection, then energy efficiency is improved, but the reliance on local infrastructure increases
Solution Approach 1:
The patent implements a self-service scheduling system where the fan device includes an internal clock and scheduling logic. The device can autonomously execute pre-programmed schedules for fan and light operation without requiring continuous external network connection or cloud server intervention. This energy-efficient scheduling capability is built into the device itself, reducing dependency on external infrastructure while improving energy efficiency
5Ease of operation
If RF and WiFi interfaces are used for control, then remote control and scheduling are enabled without external network connection, but the device complexity increases
Solution Approach 1:
The patent merges RF and WiFi control interfaces into a single fan device unit. Both wireless communication systems are integrated into the same control circuitry, allowing the device to receive commands from either RF remote controllers or WiFi-enabled mobile devices. This consolidation provides versatile remote control capability while managing interface complexity through unified processing architecture
Data Source
AI summary
Various embodiments are directed to use of RF and WiFi control in a fan device to control fan status and speed and/or fan light on/off status and intensity. A customer premises includes a WiFi router through which WiFi communications can be sent from a WiFi capable device, e.g., a cell phone, to control the fan device and its various functions. While WiFi control is via a WiFi router in the home, the control signals normally do not traverse the Internet or another external network. In addition to WiFi control, control of the fan device can be via an RF control device, e.g., a wall mounted controller. In some embodiments, the fan device reports its state and/or changes in state due to received commands to a server, and the server generates a recommended normal control schedule and an away control schedule and then uses the schedules to control fan device.