Multi-Chamber Fan Blade Structure for Integrated Lighting

Solution Overview

Problem

Existing fan blade constructions struggle to accommodate built-in devices while maintaining structural integrity, aerodynamic efficiency, and ease of assembly and maintenance.

Innovation Solution

A blade construction with separate longitudinal chambers for accommodating intelligent features like light sources, featuring a cavity for the light source and a tray, and a design that allows easy assembly, maintenance, and replacement of electrical components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the blade is made with reinforcement ribs to provide structural strength, then the blade becomes stronger and stiffer, but the blade profile becomes cumbersome and clunky, negatively affecting aerodynamic performance and increasing noise

Engineering Contradiction:

Improveblade structural strengthVSAvoidnoise and aerodynamic inefficiency

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The blade is divided into multiple longitudinal chambers separated by partition walls. These chambers can accommodate built-in devices while the partition walls themselves act as reinforcement ribs, providing structural strength without requiring a clunky overall blade profile. The segmentation allows functional components to be isolated while maintaining aerodynamic efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Built-in devices are nested within the longitudinal chambers of the blade. The chambers themselves are formed within the blade structure, allowing devices to be housed without significantly increasing the external blade dimensions or affecting aerodynamic performance. The reinforcement ribs are nested within the chamber walls.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If built-in devices are accommodated in the blade, then functional versatility is improved, but the blade design becomes more complex and may compromise structural integrity

Engineering Contradiction:

Improvedevice accommodation capabilityVSAvoidblade construction complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The blade is divided into multiple longitudinal chambers separated by partition walls. These chambers can accommodate built-in devices while the partition walls themselves act as reinforcement ribs, providing structural strength without requiring a clunky overall blade profile. The segmentation allows functional components to be isolated while maintaining aerodynamic efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The longitudinal chambers serve multiple functions: they accommodate built-in devices, provide structural reinforcement through their walls, and maintain aerodynamic profile. The partition walls simultaneously act as structural ribs and as boundaries for device placement. This multi-functionality reduces overall complexity despite adding device accommodation capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If the blade profile is optimized for aerodynamic performance, then air agitation efficiency is improved, but structural strength and stiffness are reduced

Engineering Contradiction:

Improveair agitation efficiencyVSAvoidblade structural strength

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The blade is divided into multiple longitudinal chambers separated by partition walls. These chambers can accommodate built-in devices while the partition walls themselves act as reinforcement ribs, providing structural strength without requiring a clunky overall blade profile. The segmentation allows functional components to be isolated while maintaining aerodynamic efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The blade employs a composite structure combining aerodynamic profile material with reinforcement elements. The longitudinal chambers with partition walls create a composite structure where the chamber walls provide structural reinforcement while the overall blade profile maintains aerodynamic optimization for air agitation efficiency.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentEP4363726B1Blade construction

Publication Date: 2026.04.01 NORDICCO AS

Figure 1~3
Figure 4
Figure 5~6

AI summary

The present invention disclose a blade construction for a blade for a fan and the use of such a blade in a fan, wherein said blade construction incorporates a light source emit- ting light away from said blade, and where said blade has a longitudinal extend in use radially to an axis of rotation for said fan, such that the blade construction has a root end suitable to be attached to a rotor unit, and a distal end furthest away from said root end, where the blade has an aerodynamic cross-section in a cross-section orthogonal to the longitudinal direction and where said cross-section consists of: a. A first longitudinal chamber suitable to accommodate an electrical wire; b. A second longitudinal chamber, which second longitudinal chamber is suitable to accommodate: i. Near the root end a transformer unit ii. Near the distal end said light source c. A third longitudinal chamber suitable to accommodate: iii. Near the root end a mounting bracket, allowing the blade to be mounted to the ventilators' rotor unit; iv. Near the distal end an endcap, said endcap having a cross-sec- tion corresponding to the cross-section of the blade, and where the endcap has a closed side and an opposing side having means for being attached to the blade, said means projecting into said third longitudinal chamber; d. A fourth longitudinal chamber allowing the blade to obtain the aerody- namic shape.