Blower Housing Segmentation for Coanda Airflow and Easy Maintenance

Solution Overview

Problem

Existing blowers face challenges in optimally designing airflow paths and surfaces to minimize airflow resistance and direct airflow effectively, and they struggle with manufacturing and maintaining components due to complex geometries and narrow passages.

Innovation Solution

The blower design incorporates a fan, a lower body with a suction hole, and upper bodies with walls and panels forming flow paths and air discharge slits. This design allows for the use of the coanda effect to guide airflow, minimizes flow resistance, and enables easy assembly and maintenance by allowing disassembly of complex components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If the outer wall and inner wall are designed as integrated complex geometries to form the mouse and coanda surface, then the airflow path can be optimized for minimal resistance, but the manufacturing difficulty increases and maintenance becomes problematic

Engineering Contradiction:

Improveairflow resistanceVSAvoidmanufacturing difficulty

Core Design Contradiction:

Loss of energyVSEase of manufacture

Solution Approach 1:

The blower housing is divided into separate outer wall and inner wall components that can be manufactured independently and then assembled. This segmentation allows each component to be produced using standard manufacturing processes while maintaining the complex geometric relationships needed for optimized airflow paths and coanda surfaces.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A mouse-forming structure acts as an intermediary element between the outer wall and inner wall, creating the necessary narrow passage that guides airflow to the coanda surface. This intermediary component enables the complex airflow optimization without requiring the outer and inner walls to be integrated as a single difficult-to-manufacture piece.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of energy

If the outer wall and inner wall are designed as integrated complex geometries to form the mouse and coanda surface, then the airflow path can be optimized for minimal resistance, but the ease of repair deteriorates due to inability to separate components

Engineering Contradiction:

Improveairflow resistanceVSAvoidcleaning accessibility

Core Design Contradiction:

Loss of energyVSEase of repair

Solution Approach 1:

The blower housing is divided into separate outer wall and inner wall components that can be manufactured independently and then assembled. This segmentation allows each component to be produced using standard manufacturing processes while maintaining the complex geometric relationships needed for optimized airflow paths and coanda surfaces.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The design allows the inner wall to be movable or removable relative to the outer wall, enabling access to the narrow passage and coanda surface for cleaning and maintenance while maintaining the integrated geometry during operation. This dynamic configuration resolves the conflict between optimized airflow paths and maintenance accessibility.

Inventive Principle:

Principle #15Dynamics

3Speed

If the outer wall and inner wall are designed as integrated complex geometries to form the mouse and coanda surface, then the airflow direction can be precisely controlled, but the device complexity increases

Engineering Contradiction:

Improveairflow direction controlVSAvoidstructural complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The blower housing is divided into separate outer wall and inner wall components that can be manufactured independently and then assembled. This segmentation allows each component to be produced using standard manufacturing processes while maintaining the complex geometric relationships needed for optimized airflow paths and coanda surfaces.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mouse structure and coanda surface are designed to automatically guide airflow along the desired path without requiring additional active control mechanisms. The geometric configuration itself performs the flow control function, reducing device complexity while maintaining precise airflow direction control.

Inventive Principle:

Principle #25Self-service

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 blower effectively forms a wide-range airflow using the coanda effect, minimizes airflow resistance, and facilitates easy manufacturing and maintenance, addressing the limitations of existing blower designs.

Implementation Method 1

the present disclosure relates to a blower capable of forming an airflow using a coanda effect

Methodology Applied

Scientific EffectCoanda effect: Coanda Effect

Data Source

PatentUS20250084868A1blower

Publication Date: 2025.03.13 LG ELECTRONICS INC

AI summary

A blower is provided. The blower according to the present disclosure includes: a fan causing airflow; a lower body forming an inner space at which the fan is disposed, and having a suction hole through which air passes; and a first upper body positioned above the lower body, and the first upper body may include a first wall forming a first flow path communicating with the inner space of the lower body and a first panel surrounding the first wall, and the first panel may include a first slit formed through the first panel and discharging air flowing through the first flow path to an outside of the first panel.