Dual-Blade Airflow Routing in Air Conditioners to Prevent Recirculation
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Solution Overview
Problem
Conventional air conditioners face issues with temperature control, noise, and efficiency due to high blower fan RPM, leading to uncomfortable user experiences and increased manufacturing costs, as well as poor cooling or heating performance from re-introduced air into the heat exchanger.
Innovation Solution
An air conditioner design featuring a housing with an air discharge plate and a dual-blade system that guides air flow, where the second blade reduces air passing through blade holes and directs air to a wider area for uniform discharge, preventing re-introduction into the heat exchanger and enhancing control over air discharge velocities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RPM of the blower fan is increased to maximize wind velocity and amount, then the air conditioning capability is improved, but noise is increased
Solution Approach 1:
The air discharge function is segmented into multiple paths: a first air discharge path through the outlet for high-velocity direct discharge, and a second air discharge path through the air discharge plate for low-velocity diffuse discharge. This segmentation allows the system to provide effective air conditioning without requiring the blower fan to operate at high RPM, thereby reducing noise while maintaining cooling/heating capability.
2Productivity
If the air flow path is made narrow and long to increase wind velocity, then the air conditioning capability is improved, but the discharged air temperature decreases causing user discomfort
Solution Approach 1:
Different regions of the air discharge system provide different air qualities: the outlet provides high-velocity air for rapid temperature adjustment, while the air discharge plate provides low-velocity air with more stable temperature. This local quality differentiation ensures that users receive air at appropriate temperatures for comfort while maintaining effective air conditioning capability.
3Productivity
If a larger panel is used in radiation air conditioners to provide the same air conditioning capability, then the air discharge area is increased, but manufacturing costs are increased
Solution Approach 1:
The air discharge plate serves multiple functions: it acts as a structural panel, provides a secondary air discharge path, and functions as a flow guide. This multi-functionality eliminates the need for separate large panels in radiation air conditioners, reducing manufacturing costs while maintaining air conditioning capability.
4Productivity
If the blower fan RPM is increased to maximize wind amount, then the air circulation is improved, but the device complexity and manufacturing cost are increased
Solution Approach 1:
The system dynamically switches between two air discharge modes: direct discharge through the outlet for high air circulation requirements, and diffuse discharge through the air discharge plate for comfort-oriented operation. This dynamic operation allows effective air circulation without requiring the blower fan to continuously operate at high RPM, simplifying the device while maintaining performance.
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 dual-blade system improves user comfort by controlling air discharge velocities and directions, preventing re-introduction of air into the heat exchanger, thus maintaining performance and reducing noise and manufacturing costs.
Implementation Method 1
a heat exchanger located inside the housing
Implementation Method 2
a blower fan configured to draw air into the housing through the inlet port and discharge air out of the housing through the air discharge port
Data Source
AI summary
Disclosed is an air conditioner to prevent deterioration of cooling or heating performance caused by re-introduction of cooling or heating air into a heat exchanger. The air conditioner includes a housing including an air discharge plate having a plurality of holes and an outlet, a heat exchanger located inside the housing, a blower fan configured to blow air heat-exchanged with the heat exchanger toward the air discharge plate or the outlet, a blade rotating between a guide position to guide a direction of air blown from the blower fan and discharged through the outlet and a closing position to close the outlet, wherein the blade includes a first blade and a second blade spaced apart from the first blade and configured to guide air blown from the blower fan toward the air discharge plate when the first blade is located at the closing position.