Hair Dryer Handle with Nested Insulating Walls
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Solution Overview
Problem
Conventional hairdryers face issues with vibration, noise, and blockage of the fluid inlet, which can lead to overheating of the motor, and have aesthetically unpleasing join lines and potential ease of disassembly, compromising durability and safety.
Innovation Solution
A hair care appliance design featuring a double-layered wall structure with an outer wall extending continuously around the handle, incorporating a primary fluid inlet on multiple surfaces, and a single-unit body construction without screws, along with an insulating layer and a non-linear fluid flow path, enhances noise and vibration reduction, prevents blockage, and improves aesthetics and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional single-layer wall structure is used in the handle, then the appliance structure is simpler and easier to manufacture, but vibration and noise from internal components are transmitted more readily to the outer surface
Solution Approach 1:
The patent implements a nested wall structure where an inner wall is positioned within an outer wall, creating multiple layers. The insulating material is nested between these walls, forming a composite structure that isolates internal components from the external environment, thereby reducing vibration and noise transmission while maintaining structural integrity.
Solution Approach 2:
The patent uses composite material construction by combining different materials with complementary properties: the inner wall provides structural support, the insulating material (such as foam or felt) provides vibration damping and noise reduction, and the outer wall provides the external surface. This composite approach resolves the contradiction by achieving better vibration and noise isolation without excessive complexity.
2Reliability
If the fluid inlet is positioned at a single location on the handle, then the structure is simpler, but the inlet is more susceptible to blockage which can cause motor overheating
Solution Approach 1:
The patent divides the fluid inlet into multiple separate inlet ports distributed at different locations on the handle. This segmentation ensures that if one inlet becomes blocked, other inlets remain open to provide fluid flow, thereby preventing motor overheating while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent applies local quality by positioning inlet ports at specific strategic locations on the handle where fluid flow is optimized and blockage risk is minimized. Each local inlet area is designed with appropriate characteristics for its specific position, improving overall reliability without requiring complex global restructuring.
3Object-affected harmful factors
If the outer wall does not extend continuously around the handle, then manufacturing is easier and components are more accessible, but vibration isolation and aesthetic appearance are compromised
Solution Approach 1:
The continuous outer wall is implemented as part of a nested structure where it encloses the inner wall and insulating material. This nested continuous wall provides effective vibration isolation and aesthetic appearance while the modular nested design actually simplifies manufacturing compared to attempting to create a complex non-continuous structure with multiple connection points.
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 effectively reduces noise and vibration, minimizes the risk of motor overheating, and enhances the appliance's durability and user safety by preventing easy disassembly, while maintaining a clean and visually appealing design.
Implementation Method 1
the handle comprises a layer of insulating material between the outer wall and the wall... the insulating layer mitigates one or more of noise, vibration and heat produced by the appliance
Implementation Method 2
the handle comprises a layer of insulating material between the outer wall and the wall... the insulating layer mitigates one or more of noise, vibration and heat produced by the appliance
Data Source
AI summary
Disclosed is a hair care appliance comprising a handle, the handle comprising a wall and an outer wall wherein the wall defines a primary fluid flow path that extends from a primary fluid inlet into the appliance and the outer wall is an external surface of the appliance. The outer wall may extend substantially continuously around and along the wall. An insulating layer may be provided between the wall and the outer wall, the insulating layer is may be substantially continuous around and along the wall and may mitigate one or more of noise, vibration and heat produced by the appliance. The handle may include a fan unit for drawing fluid into the primary fluid inlet and along the primary fluid flow path.