Double-Duct Hot Air Guide Structure for Uniform Hair Dryer Temperature
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Solution Overview
Problem
Existing hair dryers suffer from non-uniform air temperature distribution, leading to excessive local heating and potential scalp scalding, despite advancements in temperature control and wind-shielding structures.
Innovation Solution
A double-duct hot air guide structure with an inner and outer sleeve-shaped body, where one duct flows through a heating module and the other does not, allowing for the combination of low-temperature and high-temperature air streams to achieve uniform outlet temperature without blocking structures, using a design with flared parts and air deflectors to manage airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a wind-shielding structure is arranged at the central position of the air outlet to reduce local high temperature, then temperature uniformity is improved, but air outlet efficiency deteriorates
Solution Approach 1:
The air outlet is segmented into multiple independent outlets (first air outlet, second air outlet, third air outlet) arranged in different regions. The heating module selectively heats air for specific outlets, allowing different temperature zones without mutual interference. This segmentation eliminates the need for wind-shielding structures while maintaining temperature uniformity and air outlet efficiency.
Solution Approach 2:
Different regions of the air outlet are assigned different temperature qualities based on local needs. The heating module provides targeted heating to specific air outlets (e.g., second and third air outlets) while leaving others (e.g., first air outlet) unheated or less heated. This local quality differentiation achieves temperature uniformity across the overall outlet without requiring blocking structures that would reduce efficiency.
2Temperature
If ceramic heating technology is used to provide uniform air temperature, then temperature uniformity is improved, but local excessive temperature still occurs at the center of the air outlet
Solution Approach 1:
The heating function is segmented and distributed to multiple heating elements positioned at different locations. The heating module includes multiple heating components that can independently control temperature for different air outlets, preventing concentration of excessive heat at any single location including the center.
Solution Approach 2:
Multiple air outlets serve as intermediaries to distribute and disperse the heated air from the heating module. By routing air through different paths and outlets (first, second, third air outlets), the system prevents direct concentration of high-temperature air at the center, thereby eliminating local excessive temperature while maintaining overall uniformity.
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 structure ensures uniform air temperature distribution, preventing scalp scalding and maintaining high efficiency by combining low-temperature and high-temperature air streams, enabling longer use on one part without excessive heating.
Implementation Method 1
A first fluid entering along the air inlet and then flowing out along the inner air outlet is formed inside the shell through the blowing module. A second fluid entering along the air inlet and flowing out along the outer air outlet after passing through the heating module is also formed inside the shell through the blowing module.
Implementation Method 2
A second fluid entering along the air inlet and flowing out along the outer air outlet after passing through the heating module is also formed inside the shell through the blowing module.
Data Source
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AI summary
The present disclosure relates to the technical field of electric hair driers, in particular to a double-duct hot air guide structure and a hair drier thereof. The double-duct hot air guide structure includes a shell, a heating module and a blowing module. The shell is provided with an outer sleeve-shaped body and an inner sleeve-shaped body mounted inside the outer sleeve-shaped body. A front end of the outer sleeve-shaped body is matched with a front end of the inner sleeve-shaped body through butting so that an inner air outlet inside the inner sleeve-shaped body correspondingly and an outer air outlet between the outer sleeve-shaped body and the inner sleeve-shaped body correspondingly are formed in a front end of the shell. The heating module is arranged between the outer sleeve-shaped body and the inner sleeve-shaped body.