Impeller-Type Exhaust Apparatus Heat Blocking

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Solution Overview

Problem

Conventional exhaust systems suffer from motor damage due to thermal shock caused by high-temperature combustion gases passing through the impeller, leading to motor burnout.

Innovation Solution

An impeller-type exhaust apparatus with a heat-blocking configuration, featuring a first disc intersecting the gas flow direction, a second disc spaced apart to form a heat-blocking space, and blades that rotate with the discs to prevent heat transfer to the motor, while incorporating cooling mechanisms like first and second blades and cooling holes to dissipate heat externally.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the impeller and motor are shaft coupled with the combustion gas flowing in the same direction, then the exhaust system can be simplified in structure, but the motor is damaged by thermal shock from high-temperature combustion gas

Engineering Contradiction:

Improvestructural simplicityVSAvoidmotor durability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The impeller is divided into a first impeller portion and a second impeller portion that are not shaft-coupled, creating a physical separation between the motor and the combustion gas flow path. This segmentation allows the motor to be protected from thermal shock while maintaining exhaust functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A heat blocking plate is introduced as an intermediary component between the first impeller portion and the motor. This plate blocks the transfer of heat from the combustion gas to the motor, preventing thermal damage while allowing the exhaust system to maintain its simplified structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Volume of moving object

If the motor is positioned close to the impeller for compact design, then the device size is reduced, but the motor is exposed to high-temperature combustion gas causing thermal damage

Engineering Contradiction:

Improvedevice compactnessVSAvoidthermal shock exposure

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The impeller is segmented into two portions that rotate independently without shaft coupling. The first impeller portion handles combustion gas intake while the second portion manages exhaust discharge, creating spatial separation that protects the motor from thermal exposure while maintaining compact positioning.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The heat blocking plate serves as a protective intermediary positioned between the first impeller portion and the motor. It physically blocks thermal radiation and convection from reaching the motor, enabling compact design without compromising motor safety.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If the impeller rotates directly coupled to the motor, then power transmission is efficient, but heat from combustion gas transfers to the motor causing burnout

Engineering Contradiction:

Improvepower transmission efficiencyVSAvoidmotor temperature

Core Design Contradiction:

Use of energy by moving objectVSTemperature

Solution Approach 1:

The impeller is divided into two independently rotating portions without direct shaft coupling to the motor. This segmentation breaks the direct thermal conduction path from combustion gas to motor while maintaining efficient power transmission through magnetic coupling or belt drive mechanisms.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The heat blocking plate acts as a thermal intermediary that prevents heat transfer from the first impeller portion to the motor. This allows the motor to operate at safe temperatures while the impeller portions rotate efficiently to transmit power for exhaust discharge.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Effectively prevents motor damage by blocking heat transfer from high-temperature gases and rapidly cooling the impeller, ensuring the motor remains protected from thermal stress and heat-related damage.

Implementation Method 1

a heat blocking space configured to block heat transfer from the first disc to the second disc

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 2

configured to cool the first disc by external air while discharging the high-temperature gas

Methodology Applied

Scientific EffectConvection cooling: Convection

Implementation Method 3

make the inside of the chimney into a negative pressure state by the operation of the exhaust system, suck the combustion gas generated from the combustion chamber into the chimney

Methodology Applied

Scientific EffectPressure differential: Pressure Gradient

Data Source

PatentUS12117008B2Impeller-type exhaust apparatus for blocking electric heat

Publication Date: 2024.10.15 LEE HYUN GYU

AI summary

Proposed is an impeller-type exhaust apparatus for blocking transfer of heat including a first disc facing a high-temperature gas, a second disc spaced apart from the first disc to form a heat blocking space, a plurality of blades formed along the circumferences of the first disc and the second disc, and a motor which provides rotary power to the first disc and the second disc, wherein heat can be blocked through the heat blocking space.