Vacuum Cleaner Motor Valve Venting for Continuous Cooling
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Solution Overview
Problem
Vacuum cleaners often suffer motor damage due to overheating when the dust suction port is blocked, leading to insufficient air cooling, as existing solutions either fail to continuously supply air or result in inefficient cooling and noise due to frequent opening and closing of the penetration hole.
Innovation Solution
A motor protection apparatus with a valve member that moves between positions to control air flow through a penetration hole, ensuring continuous air supply to the motor chamber by optimizing the distance between the valve member and the casing to maintain pressure and reduce noise, while preventing premature closure of the penetration hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the penetration hole is opened to supply air to the motor chamber, then the motor cooling is improved, but noise increases and the penetration hole closes frequently causing inefficient cooling
Solution Approach 1:
A valve member is introduced as an intermediary component between the penetration hole and the motor chamber. The valve member selectively opens or closes the penetration hole based on motor operating conditions, mediating the air flow to provide cooling only when necessary (when motor temperature exceeds a threshold), thereby reducing noise from continuous opening/closing while maintaining effective cooling when needed
2Volume of moving object
If the valve member is positioned close to the penetration hole, then the device structure is compact, but air flow restriction increases reducing cooling efficiency
Solution Approach 1:
The valve member is designed to move dynamically between different positions (open and closed states) based on motor temperature conditions. When the motor requires cooling, the valve member moves to an open position that provides sufficient air flow path, ensuring adequate cooling air quantity. When cooling is not needed, the valve closes to maintain compact effective volume. This dynamic positioning resolves the contradiction between compactness and air flow quantity
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
The apparatus effectively protects the motor from overheating by maintaining continuous air flow, reducing noise, and improving cooling efficiency by minimizing frequent opening and closing of the penetration hole, thus preventing motor damage.
Implementation Method 1
a valve member positioned proximate to the penetration hole and configured to open and close to enable air flow to the motor chamber such that air is substantially continuously supplied to the motor chamber
Data Source
AI summary
A motor protection apparatus for a vacuum cleaner includes: a motor chamber adapted to mount a motor; a penetration hole formed on a partition surrounding the motor chamber; a valve member configured to move between a first position closing the penetration hole and a second position at a distance from the penetration hole; and a casing adapted to be connected to an inner wall of the partition to surround the valve member and to guide movement of the valve member. A casing distance between an inner circumference of the casing and the valve member is minimized when the valve member is in the first position and maximized when the valve member is in the second position.