Impeller Blade Concave Channel Air Displacement

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Solution Overview

Problem

Current ceiling fan designs focus more on aesthetics than improving air displacement characteristics, leading to a need for enhanced structural and functional improvements in fan blades to enhance air movement efficiency.

Innovation Solution

The design of impeller blades with a concave channel and specific bracket attachment features allows for aggressive air displacement, reducing the need for high rotational speeds and improving energy efficiency by directing air downward and outward effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If ceiling fan design focuses on aesthetics and interior decor matching, then design flexibility and visual appeal are improved, but air displacement characteristics and energy efficiency deteriorate

Engineering Contradiction:

Improvedesign flexibilityVSAvoidair displacement

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The fan blade is divided into multiple functional zones: a concave channel section for air displacement, a convex section for structural integrity, and a bracket receiving face for mounting. This segmentation allows each zone to optimize its function while maintaining overall design flexibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the fan blade are given different geometric properties - the concave channel portion is optimized for air displacement efficiency, while the convex portion maintains structural strength. This local differentiation enables both aesthetic design freedom and improved air displacement performance.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If conventional fan blade structures are used, then manufacturing simplicity is maintained, but air displacement efficiency and energy consumption deteriorate

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidenergy consumption

Core Design Contradiction:

Ease of manufactureVSUse of energy by moving object

Solution Approach 1:

The fan blade incorporates a concave channel with curved surfaces that efficiently direct air flow. The curved geometry of the concave portion optimizes air displacement by creating smooth flow paths, reducing turbulence and energy loss while maintaining manufacturing feasibility through standard molding techniques.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The concave channel creates a three-dimensional air displacement pathway rather than relying on simple two-dimensional blade surfaces. This dimensional addition allows air to be channeled more effectively downward and outward, improving displacement efficiency without complicating the manufacturing process.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Productivity

If high rotational speeds are used to improve air displacement, then air movement efficiency is improved, but energy consumption and fan imbalance worsen

Engineering Contradiction:

Improveair movement efficiencyVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The concave channel's curved surfaces are specifically designed to maximize air displacement at lower rotational speeds. The geometry creates efficient air flow paths that multiply the effect of blade movement, achieving high air movement efficiency without requiring high rotational speeds that would increase energy consumption and potential imbalance.

Inventive Principle:

Principle #14Spheroidality (Curvature)

4Ease of manufacture

If fan blade structure is simplified for ease of manufacture, then manufacturing cost is reduced, but air displacement characteristics and energy efficiency deteriorate

Engineering Contradiction:

Improvemanufacturing easeVSAvoidenergy efficiency

Core Design Contradiction:

Ease of manufactureVSUse of energy by moving object

Solution Approach 1:

The blade structure is segmented into distinct functional portions (concave channel, convex section, bracket receiving face) that can be manufactured as an integrated component using standard molding processes. This segmentation enables complex air displacement geometry to be achieved without requiring multiple assembly steps, maintaining manufacturing ease while improving energy efficiency.

Inventive Principle:

Principle #1Segmentation

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 impeller blades provide a widespread and aggressive air displacement, reducing energy consumption and preventing fan imbalance, while maintaining design flexibility with adjustable blade number and size.

Implementation Method 1

a major generally concave channel extending from an open end thereof at the distal end of the impeller blade body to a closed end thereof adjacent to the proximal end of the impeller blade body

Methodology Applied

Scientific EffectFluid flow:

Data Source

PatentUS7384242B2Impeller blade and fan

Publication Date: 2008.06.10 AIR COOL INDAL

AI summary

An impeller blade includes an elongate impeller blade body having opposing proximal and distal ends, opposing first and second edges extending from the proximal end to the distal end, and opposing upper and lower sides. The lower side includes a major generally concave channel extending from an open end thereof at the distal end of the impeller blade body to a closed end thereof adjacent to the proximal end of the impeller blade body.