Coanda Slit Blower Structure for Even Air Distribution

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Solution Overview

Problem

Existing blowers discharge air to a specific area, requiring movement or rotation to change wind direction, leading to power consumption, noise, and vibration.

Innovation Solution

A blower design featuring elongated upper bodies with curved surfaces and slits that utilize the Coanda effect to distribute airflow evenly, minimizing the need for mechanical adjustments and reducing noise and vibration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If air is discharged to a specific area using conventional blowers, then air discharge structure is simple, but wind direction cannot be changed without moving or rotating the fan

Engineering Contradiction:

Improvewind direction adjustmentVSAvoidmechanical adjustment structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The air outlet is divided into multiple independent openings (first opening and second opening) that can be adjusted separately. Each opening can be rotated independently to change wind direction, allowing versatile directional control without moving the entire fan assembly.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The openings are designed to be rotatable relative to the housing, transforming a static air discharge structure into a dynamic one. This allows the wind direction to be changed by rotating the openings rather than moving the fan, reducing mechanical complexity while maintaining adaptability.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the fan is moved or rotated to change wind direction, then wind direction can be adjusted, but power is consumed and noise or vibration is generated

Engineering Contradiction:

Improvewind direction controlVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The directional adjustment function is extracted from the fan assembly and placed in the air outlet openings. By separating the fan (which generates air) from the directional control (which is handled by the rotatable openings), the system avoids the need to move or rotate the fan for direction changes, thereby reducing power consumption and noise.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The mechanical system of rotating the entire fan assembly is replaced with a simpler mechanism of rotating only the air outlet openings. This substitution reduces the mass being moved, thereby reducing power consumption and minimizing noise and vibration during directional adjustment.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If air is discharged to a specific area, then air discharge structure is simple, but air is not distributed evenly across the indoor space

Engineering Contradiction:

Improveair discharge structureVSAvoidair distribution coverage

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The air outlet is segmented into multiple openings positioned at different locations and orientations. This segmentation allows air to be discharged to multiple areas simultaneously, improving distribution coverage while maintaining a relatively simple overall structure. Each opening can be independently oriented to target specific zones within the indoor space.

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 design provides a rich volume of airflow with reduced noise and vibration, allowing for comfortable and efficient air distribution without mechanical adjustments.

Implementation Method 1

A blower design featuring elongated upper bodies with curved surfaces and slits that utilize the Coanda effect to distribute airflow evenly

Methodology Applied

Scientific EffectCoanda effect: Coanda Effect

Data Source

PatentUS20260028994A1blower

Publication Date: 2026.01.29 LG ELECTRONICS INC

AI summary

A blower is provided that may include a fan that creates airflow; a lower body forming a lower space therein in which the fan may be disposed, and having at least one suction hole through which air passes; a first upper body positioned above the lower body, and forming a first inner space that communicates with the lower space of the lower body; a second upper body positioned above the lower body, and forming a second inner space that communicates with the lower space of the lower body, the second upper body being spaced apart from the first upper body; and a space formed between the first upper body and the second upper body, and opened in a frontward-rearward direction. The first upper body may include a first slit formed through the first upper body such that air in the first inner space may be discharged into the space, and the second upper body may include a second slit formed through the second upper body such that air in the second inner space may be discharged into the space.