Fan with Remote Temperature Sensor to Reduce Motor Heat Interference
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Solution Overview
Problem
Existing fan systems face challenges in accurately measuring ambient temperature due to heat generated by the fan motor and difficulty in installing or removing modular components, especially when mounted overhead.
Innovation Solution
Incorporating a remote temperature sensor, such as a passive infrared sensor, that receives energy through a cover to detect external temperatures independently of the fan's heat sources, and a bayonet fitting mechanism for easy connection of fan components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is mounted on the fan or within the housing to measure ambient temperature, then the fan can regulate its operation based on temperature, but the readings are skewed by the heat generated by the fan motor and the location of the fan
Solution Approach 1:
The temperature sensing function is extracted from the fan housing and relocated to a remote location away from the motor. The patent uses a separate temperature sensor positioned at a distance from the fan, connected via wiring, to measure ambient temperature without being influenced by motor-generated heat. This separation eliminates the measurement error caused by thermal interference.
Solution Approach 2:
The patent introduces an intermediary temperature sensor that is positioned between the ambient environment and the fan system. This sensor acts as a mediator to capture the true ambient temperature without direct exposure to motor heat, providing accurate temperature data to the control system for fan regulation.
2Strength
If modular components such as covers are secured with fasteners requiring tools, then the connection is secure, but installation and removal become difficult especially when the fan is mounted overhead
Solution Approach 1:
The patent replaces the traditional mechanical fastener system (screws, bolts requiring tools) with a snap-fit or clip-based mechanical interlocking system. This allows the cover to be securely attached to the housing while enabling tool-free installation and removal by simply pushing or pulling the cover into place.
Solution Approach 2:
The cover is designed as a separate modular component that can be easily detached from the main housing. The segmentation allows the cover to be independently installed or removed without requiring disassembly of the entire fan unit, greatly simplifying maintenance and cleaning operations.
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
Enables accurate temperature regulation of the fan operation and simplifies the installation and removal of modular components by providing reliable, non-contact temperature sensing and secure, tool-free mounting.
Implementation Method 1
The temperature sensor may comprise a passive infrared sensor, and may also include a temperature sensor for sensing a local temperature at the fan
Data Source
AI summary
A fan includes a temperature sensor, such as a passive infrared sensor, for sensing temperature at a location remote from the fan, such as at a floor, ceiling, or wall, or simply external to the fan housing. This may avoid the influence of heat generated from components of the fan, such as the fan motor or controller for controlling the operation of the fan. A mounting arrangement for forming a connection between two parts, such as components of a fan, is also described.