Riding Vehicle Fan Canopy Assembly Rearward Air Intake
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Solution Overview
Problem
Downdraft fan systems for riding vehicles face issues such as drawing contaminants like dust and insects, and can interfere with operator vision and movement, especially in environments where particulate matter is kicked up by the vehicle's motion.
Innovation Solution
A fan and canopy assembly where the canopy is directly mounted on the fan or vice versa, without additional hardware, with features like an inner flange overlying the fan to maintain airflow, a roof cap for sun and precipitation protection, and vents around the canopy to draw air from the rear, preventing debris entry and ensuring cooler operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the fan is positioned to draw air from ground level or front area, then cooling effect is provided, but contaminants such as dust and insects are drawn into the circulating stream
Solution Approach 1:
The air intake direction is inverted from the conventional front or ground-level intake to a rearward-facing intake. The fan assembly draws air from the rear of the vehicle rather than from the front, reversing the typical airflow pattern to avoid contaminated areas while maintaining cooling effectiveness.
Solution Approach 2:
The harmful function of drawing in contaminants is extracted and eliminated by repositioning the air intake away from contaminated zones. The fan system selectively extracts only clean air from the rear area, separating the cooling function from the contaminant intake problem.
2Reliability
If additional mounting hardware is used to attach canopy to fan, then secure mounting is achieved, but device complexity and ease of manufacture are worsened
Solution Approach 1:
The canopy and fan assembly are merged into a single integrated unit where the canopy structure itself serves as the mounting interface for the fan. The fan is directly attached to the canopy's internal structure, eliminating the need for separate mounting brackets, bolts, or other hardware components.
Solution Approach 2:
The canopy structure performs multiple functions: it provides operator protection from elements and simultaneously serves as the mounting structure for the fan assembly. This multi-functionality eliminates the need for dedicated mounting hardware, simplifying the overall device.
3Productivity
If the canopy structure is designed with open front for air intake, then airflow is maintained, but debris and insects can enter the fan
Solution Approach 1:
The air intake orientation is inverted from a front-open configuration to a rearward-facing intake. By drawing air from the rear of the vehicle where the airflow is cleaner, the system maintains productivity while avoiding the harmful effect of debris and insect ingestion.
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 shields operators from solar and moisture while preventing debris entry, maintaining airflow and improving operating conditions by drawing air from a cleaner source, thus enhancing comfort and safety.
Implementation Method 1
certain downdraft fan systems for riding vehicles... may be used to, for example, direct a constant flow of ambient air downwardly over the operator
Implementation Method 2
the canopy providing protection for the operator from solar and moisture
Data Source
AI summary
A downdraft fan assembly mountable on a vehicle roll bar, which may be used for providing a flow of ambient air over the vehicle operator, and a canopy carried by the fan assembly, which may be used for providing solar and precipitation protection for the operator. The downdraft fan may draw air through a roof cap with a rear-facing outlet, or may draw air through a series of vents disposed around the canopy of the assembly, or through some combination of the two, such as may be desired. In some variations, multiple openings may be provided in the roof, if desired.