Axial-flow fan lead wire routing mechanism
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Solution Overview
Problem
Conventional axial flow fans complicate lead wire management, as they often require lead wires to be pulled out towards the suction port, leading to entanglement with the impeller and noise issues, and pose challenges when multiple fans are used.
Innovation Solution
The axial flow fan design includes a first and second lead wire engaging portion, with a third engaging portion on the first flange, allowing lead wires to be pulled out towards either side, reducing noise and ensuring secure exit, even when multiple fans are arranged in the axial direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lead wires are pulled out toward the suction port in conventional axial flow fans, then the lead wires can be routed outside the fan housing, but the lead wires may contact the impeller or be blown by wind causing noise
Solution Approach 1:
The fan housing is divided into a first flange with a first lead wire engaging portion and a second flange with a second lead wire engaging portion, allowing lead wires to be routed through separate engagement points rather than a single location, thereby avoiding impeller contact and reducing noise
Solution Approach 2:
Lead wire engaging portions act as intermediary structures that guide and secure lead wires as they pass from the internal motor space to the external environment, preventing direct contact between lead wires and the impeller while reducing wind-induced noise
2Ease of operation
If lead wires are pulled out toward the suction port, then wiring can be simplified, but wiring becomes complicated when lead wires need to be pulled out toward the discharge port
Solution Approach 1:
The fan housing is designed with dual lead wire engaging portions (first and second) located on different flanges, enabling the same housing structure to support lead wire routing in multiple directions (toward suction port or discharge port), thereby providing universal adaptability for different installation configurations
Solution Approach 2:
Lead wire routing options are extended from a single axial direction to multiple spatial directions by positioning engaging portions on both the first and second flanges, allowing lead wires to be pulled out toward either the suction port or discharge port depending on installation requirements
3Productivity
If multiple axial flow fans are used, then cooling capacity is increased, but lead wire management becomes more difficult and secure exit is compromised
Solution Approach 1:
Each fan is equipped with separate first and second lead wire engaging portions, allowing individual lead wire management for each fan unit when multiple fans are installed, thereby simplifying overall wire management across the system
Solution Approach 2:
Lead wire engaging portions are pre-configured on the fan housing flanges to provide predetermined routing paths, enabling secure lead wire exit even when multiple fans are installed in close proximity, thereby maintaining ease of wire management as system scale increases
Data Source
Figure 1
Figure 2
Figure 3(A)~3(B)
AI summary
An axial flow fan provided herein allows for a wide range of selection for placement of the fan and wiring of the lead wires. The axial flow fan includes a first lead wire engaging portion 17 configured to be engaged with a plurality of lead wires 15 such that the lead wires are pulled out therefrom into an outer space OS defined between a first flange 21 and a second flange 23 of a fan housing 3, a second lead wire engaging portion 19 configured to be engaged with the plurality of lead wires 15 such that the lead wires, which have been engaged with the first lead wire engaging portion 17 and pulled out therefrom into the outer space OS, are then pulled out toward the other side in the axial direction where the second flange 23 is positioned, and a third lead wire engaging portion 27 configured to be engaged with the plurality of lead wires 15 such that the lead wires, which have been engaged with the first lead wire engaging portion 17 and pulled out therefrom into the outer space OS, are then pulled out in the axial direction toward one side where the first flange 21 is positioned. The third lead wire engaging portion 27 is formed in the first flange 21 at a given distance from the first lead wire engaging portion 17.