Serial Axial Flow Fan Current Plate Turbulence Control
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Solution Overview
Problem
Conventional serial axial flow fans experience reduced blowing efficiency due to turbulence generated at the coupling unit between two axial flow fans, particularly when a recess is provided for lead wires, which affects the flow of air and increases air leakage.
Innovation Solution
A serial axial flow fan configuration that includes a current plate with lattice-shaped partition walls and hollow cells arranged axially, positioned between the first and second axial flow fans to rectify the air flow and prevent turbulence, while accommodating lead wires in recesses that overlap with the current plate to minimize air leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a recess is provided in the housing for accommodating lead wires, then the lead wire can be extracted to the outside, but turbulence is generated near the recess and air flow leaks to the outside
Solution Approach 1:
A current plate is introduced as an intermediary component between the first and second axial flow fans. This current plate serves as a mediator that both accommodates the lead wires (through recesses) and guides the air flow (through its planar surface), thereby resolving the conflict between lead wire extraction and maintaining blowing efficiency
Solution Approach 2:
The harmful function of the recess (causing turbulence and air leakage) is extracted and isolated by providing the recess only in the current plate, while the main housing maintains a smooth surface for proper air flow guidance. This separates the lead wire accommodation function from the air flow path
2Productivity
If two axial flow fans are connected in series to increase blast volume, then the air flow rate is increased, but turbulence is generated at the coupling unit affecting the air flow
Solution Approach 1:
The current plate acts as an intermediary component between the two axial flow fans in the series connection. It provides a smooth planar surface that guides the air flow from the first fan into the second fan, preventing turbulence at the coupling interface while maintaining the increased air flow rate achieved through series connection
Solution Approach 2:
The current plate is positioned in advance at the coupling unit between the two fans to pre-rectify and guide the air flow before it enters the second fan. This preliminary action prevents turbulence from developing at the interface, ensuring stable air flow composition throughout the series connection
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 configuration improves the blowing efficiency by ensuring a smooth axial flow and reducing turbulence, thereby enhancing the pressure and air volume of the air flow, and reduces noise generated by the fan.
Implementation Method 1
a current plate in which a plurality of hollow cells, which are partitioned by a lattice-shaped partition wall and penetrate in an axial direction, are uniformly two-dimensionally arranged
Data Source
AI summary
A serial axial flow fan includes a first axial flow fan, a second axial flow fan, and a current plate. Hollow cells of the current plate are partitioned by a lattice-shaped partition, penetrate in an axial direction, and are uniformly two-dimensionally arranged at an outer edge. An axially lower end portion of a first housing of the first axial flow fan and an axially upper end portion of a second housing are directly coupled to each other, and the current plate is provided in a coupling unit of the first housing and the second housing. An axially lower end portion of the first tubular unit of the first housing is axially opposed to an axially upper end portion of the second tubular unit of the second housing with the current plate interposed therebetween. A recess recessed on an opposite side to the coupling unit in the axial direction is provided on an axially end surface of at least one of an axially lower end surface of the first tubular unit and an axially upper end surface of the second tubular unit. A lead wire of at least one of the first axial flow fan and the second axial flow fan is accommodated in the recess. At least a portion of the recess overlaps a portion of the current plate in the axial direction.