Single-Sided Neck Fan Inlet Layout to Prevent Hair Entanglement
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Solution Overview
Problem
Existing neck fans supply air from both sides, leading to hair entanglement, dust and impurity entry, and potential product failure due to moisture ingress, which affects reliability and safety.
Innovation Solution
A neck fan design with a single-sided air inlet structure and enclosure walls to protect circuit boards and batteries, guiding air from a single side to the outlet while preventing moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If air inlets are provided on two sides of the fan blade groups to increase air intake volume, then the air intake volume is improved, but hairs easily wrap around the air inlets causing fan failure or user injury
Solution Approach 1:
The patent applies asymmetry by providing air inlets only on one side of the fan blade group rather than symmetrically on both sides. The housing includes a first side and a second side, with air inlets located only on the first side, creating an asymmetric structure that reduces hair entanglement while maintaining adequate air intake through optimized inlet positioning and fan blade design
2Quantity of substance
If air inlets are provided on two sides of the fan blade groups, then the air intake volume is improved, but dust and impurities easily enter the product causing product failure
Solution Approach 1:
The patent reduces dust and impurity entry by adopting an asymmetric single-sided air inlet configuration. By limiting air inlets to one side of the housing, the design minimizes exposed openings that could allow contaminants to enter, while still achieving sufficient air intake through strategic placement of the inlet and optimization of the fan blade geometry
3Device complexity
If circuit boards and batteries are scattered inside the housing, then the internal arrangement is simplified, but rainwater or sweat falling into the housing through gaps causes circuit boards and batteries to get wet leading to product failure
Solution Approach 1:
The patent applies segmentation by dividing the housing into distinct functional regions: a first accommodating cavity for the fan blade group and a second accommodating cavity for circuit boards and batteries. This spatial separation creates isolated compartments that protect sensitive electronic components from moisture ingress through air inlets and gaps, while maintaining relatively simple internal arrangement
Solution Approach 2:
The patent introduces an intermediary protective structure in the form of a waterproof cover or sealing mechanism that mediates between the air inlet and the internal components. This intermediary element allows air to pass through while blocking rainwater and sweat from reaching the circuit boards and batteries, thus protecting against moisture-related failures
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
Enhances air intake efficiency, reduces product failure, and ensures reliability by avoiding hair entanglement and dust entry, while maintaining effective cooling and ensuring product safety.
Implementation Method 1
the first centrifugal vane wheel and the second centrifugal vane wheel are configured to guide air from the air inlet on a single side to the at least one first air outlet for blowing out
Data Source
AI summary
The neck fan includes a neck fan main body and fan blade groups. The neck fan main body includes a blowing housing. The blowing housing forms an accommodating cavity, an air inlet and an air outlet. The fan blade groups arranged in the accommodating cavities. Each fan blade group includes a base plate, a first centrifugal vane wheel, and a second centrifugal vane wheel. The second centrifugal vane wheel is arranged around a periphery of the first centrifugal vane wheel. Each blowing housing includes a first side, a second side opposite to the first side, a third side and a fourth side. The at least one air inlet is provided in one of the first side and the second side and the other one of the first side and the second side has no air inlet, so that the blowing housing is formed into a single-sided air inlet structure.