Movable Shroud for Exercise Fan Airflow Control
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Solution Overview
Problem
Conventional stationary exercise machines with resistance fans do not allow users to change the airflow without modifying the resistance level, as the total surface area of the fan housing affects the resistance encountered.
Innovation Solution
A movable shroud on the housing of the resistance fan redirects air without altering the cross-sectional area, maintaining the resistance level by covering an equal portion of the openings as it moves, ensuring consistent resistance to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the total surface area of the fan housing is reduced to redirect airflow, then airflow redirection is achieved, but the resistance level changes
Solution Approach 1:
The housing is divided into multiple separate openings instead of a single large opening. This segmentation allows individual openings to be selectively covered by the shroud, enabling airflow redirection while maintaining the total open area constant, thus preserving resistance level
Solution Approach 2:
A movable shroud is introduced that can dynamically adjust which openings are covered. The shroud moves to redirect airflow to different areas while maintaining a constant coverage area, allowing real-time airflow direction control without changing resistance
2Ease of operation
If a shroud is added to redirect airflow, then airflow direction is controlled, but device complexity increases
Solution Approach 1:
The shroud is designed as a thin, movable component that can be made from flexible or semi-rigid materials. This minimizes the added complexity and weight while still effectively redirecting airflow, as the shroud simply needs to occlude openings rather than form rigid structural elements
Solution Approach 2:
The shroud serves multiple functions: it redirects airflow, controls cooling distribution, and can be adjusted by the user. This single component performs what would otherwise require multiple separate systems, reducing overall device complexity
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
Enables airflow redirection without changing the resistance provided to the user, enhancing user comfort by maintaining consistent resistance levels during adjustments.
Implementation Method 1
a resistance fan on the supporting frame, the resistance fan being configured to provide an amount of resistance to a user of the exercise machine; a housing enclosing the resistance fan, the housing having a plurality of openings through which air from the resistance fan is directed towards the user of the exercise machine
Data Source
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AI summary
An exercise machine has a supporting frame; a resistance fan on the supporting frame, the resistance fan being configured to provide an amount of resistance to a user of the exercise machine; a housing enclosing the resistance fan, the housing having a plurality of openings through which air from the resistance fan is directed towards the user of the exercise machine; and a shroud on the housing. The shroud is movable with respect to the plurality of openings so as to redirect the air from the resistance fan without changing the amount of resistance provided to the user of the exercise machine.