Fan Assembly Nozzle Retaining Mechanism
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Solution Overview
Problem
Conventional fan designs often lack easy and secure methods for removing and replacing the nozzle and filter components, leading to potential air leakage and maintenance difficulties.
Innovation Solution
A manually actuable member, such as compression spring-biased buttons, is integrated into the nozzle to allow for rapid and secure release from the fan body, enabling easy removal and replacement while maintaining a sealed air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional nozzle retaining means is used, then the nozzle is securely retained on the body, but the nozzle cannot be rapidly removed for maintenance
Solution Approach 1:
The retaining mechanism transitions from a static conventional design to a dynamic system with manually actuable members that can change state between locked and unlocked positions. The buttons can be pressed to release the nozzle or spring-loaded to automatically engage with detents, providing both secure retention during operation and rapid removal when needed.
Solution Approach 2:
The spring-loaded buttons with detents create a self-engaging mechanism where the nozzle automatically locks into position when attached to the body. The spring force automatically pushes the buttons into engagement with the detents without requiring manual intervention, while still allowing easy manual release when needed.
2Ease of repair
If the nozzle is securely retained on the body, then air flow is sealed, but the filter and nozzle cannot be easily accessed for cleaning
Solution Approach 1:
The fan assembly is divided into separable components (nozzle and filter) that can be independently removed from the body. The manually actuable retaining mechanism enables clean segmentation without requiring disassembly of the entire device, allowing users to access and clean only the nozzle and filter components as needed.
Solution Approach 2:
The manually actuable members (buttons) serve as intermediary elements between the user and the retaining mechanism. By pressing these buttons, users can easily release the nozzle without dealing with complex fasteners or tools, simplifying the maintenance process while maintaining secure retention during normal operation.
3Reliability
If manual buttons are used for release, then the nozzle can be easily removed, but air may leak during operation
Solution Approach 1:
The sealing function is extracted as a separate concern from the retaining mechanism. The seal is provided by the interface between the nozzle and body, while the manually actuable buttons with spring-loaded detents provide the retaining function. This separation ensures that the seal integrity is maintained through proper mechanical engagement without compromising ease of release.
Solution Approach 2:
The spring-loaded buttons provide a cushioning force that maintains constant pressure on the sealing interface between the nozzle and body. This pre-applied spring force ensures reliable sealing during operation while still allowing easy manual override when release is needed, cushioning against variations in assembly tolerance and wear.
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 solution allows for quick and easy nozzle and filter maintenance without air leakage, enhancing user experience and operational efficiency.
Implementation Method 1
The nozzle retaining means is biased towards the first configuration, such that the nozzle is retained on the body in its normal state. The biasing means may conveniently be in the form of a compression spring
Data Source
Figure 1
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AI summary
A fan assembly comprising: a body comprising an inlet, an outlet and means for generating an air flow; a nozzle mountable on the body for receiving the air flow from the body and for emitting the air flow; nozzle retaining means for releasably retaining the nozzle on the body, the nozzle retaining means having a first configuration in which the nozzle is retained on the body and a second configuration in which the nozzle is released for removal from the body; and a manually actuable member located on the nozzle for effecting movement of the nozzle retaining means from the first configuration to the second configuration.