Single Axial Fan Cooling System for Compact Loaders
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Solution Overview
Problem
Existing cooling air systems for compact work vehicles, such as loaders, often rely on radial fans and lack efficient use of single, easily controlled axial flow fans to direct air through multiple paths effectively, limiting cooling capacity in compact spaces.
Innovation Solution
A cooling air control system utilizing a single axial flow fan with a reversible motor, mounted within a shroud, which can direct air flow through multiple paths by creating both high and low pressure areas, allowing air to be drawn in and exhausted through strategically positioned openings, enabling efficient cooling of engine components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radial fans are used for cooling engine compartments, then cooling air output can be achieved, but the system complexity increases and ease of operation decreases
Solution Approach 1:
The patent changes the fundamental parameter of fan type from radial to axial flow fan. This parameter change simplifies the system by using a single axial fan with reversible motor capability instead of multiple radial fans, while maintaining effective cooling air output through the axial fan's ability to move large volumes of air efficiently
2Adaptability or versatility
If multiple cooling paths are implemented, then cooling versatility improves, but device complexity increases
Solution Approach 1:
The axial fan is designed with multi-functionality by incorporating reversible motor capability, allowing the same single fan to perform multiple cooling paths by reversing rotation direction. This eliminates the need for separate fans for different cooling paths, reducing device complexity while maintaining cooling versatility
Solution Approach 2:
The system implements dynamic control by allowing the fan to rotate in both directions. This dynamic capability enables the single fan to adaptively direct cooling air through different paths based on operational requirements, providing versatility without increasing component count
3Ease of operation
If axial fan with reversible motor is used, then ease of operation improves, but manufacturing complexity increases
Solution Approach 1:
The patent changes the motor type to a reversible motor capable of axial fan operation. While this increases manufacturing complexity slightly, it provides superior ease of operation through simple directional control, achieving multiple cooling paths through a single controlled component rather than multiple independently controlled fans
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
This solution allows for effective cooling of engine compartments and components like radiators and oil coolers in compact vehicles by utilizing a single axial fan to manage airflow efficiently, optimizing space and cooling performance.
Implementation Method 1
A single axial fan is driven with a suitable motor, and the fan blades are mounted within a surrounding shroud. The shroud has open ends so air can enter and exit the shroud when the fan is driven.
Implementation Method 2
A single axial fan is driven with a suitable motor, and the fan blades are mounted within a surrounding shroud.
Implementation Method 3
reversing the fan motor so the fan blades rotate in a second direction creates a lower than atmospheric pressure in the second shroud so that air is then drawn inward into the second shroud
Data Source
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AI summary
A cooling system for a compact vehicle such as a compact loader (10) having an engine (18) and an engine compartment (16), includes a single axial flow fan (46) that is surrounded by a shroud (40) and has a high pressure side (44) and a low pressure side (42). Air flow generated by the fan (46) is used for cooling components (58, 60) of the compact vehicle (10) and exhausting heated air from a second shroud. Auxiliary openings (82) are provided between the engine compartment and the shrouds to provide air flow between the engine compartment (16) and one or both of the shrouds (40, 62) when the fan (46) is rotating. The motor (52) driving the fan (46) is reversible.