Turbofan Pressure-Increase Flow Path Design
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Solution Overview
Problem
Conventional turbofans in air conditioners lack an efficient mechanism to gradually increase air pressure while minimizing power consumption and reducing air flow separation, leading to suboptimal performance and increased energy requirements.
Innovation Solution
A turbofan design featuring a circular end plate, a ring-shaped shroud, and blade members forming a pressure-increase flow path with a gradually increasing cross-sectional area, utilizing both the pressure-increase effect of the blade members and the diffuser effect of the flow path to enhance air pressure while optimizing blade angles to reduce slip flow and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the cross-sectional area of the flow path is uniform from upstream to downstream, then the structure is simple, but the air pressure cannot be efficiently increased and power consumption increases
Solution Approach 1:
The flow path cross-sectional area is changed from uniform to gradually increasing from upstream to downstream. This parameter change allows the flow path to function as a diffuser, converting kinetic energy to pressure energy and increasing air pressure while reducing power consumption requirements.
2Productivity
If the cross-sectional area of the flow path is uniform, then the structure is simple, but air flow separation occurs and performance is reduced
Solution Approach 1:
The flow path cross-sectional area is designed to gradually increase from upstream to downstream, transforming the flow path into a diffuser configuration. This parameter change prevents air flow separation by maintaining smoother flow patterns, thereby improving air flow performance while the structural complexity remains manageable.
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 effectively increases air pressure with reduced power consumption and minimized air flow separation, improving the overall efficiency and performance of the turbofan by leveraging both pressure-increase and diffuser effects within the specified area ratios and angle ratios.
Implementation Method 1
an annular portion of a space between the end plate and the shroud where the blade members are disposed is a pressure-increase flow path
Implementation Method 2
The cross-sectional area of the pressure-increase flow path increases gradually from an upstream end toward a downstream end of the pressure-increase flow path
Data Source
AI summary
A turbofan includes a circular end plate, a ring-shaped shroud facing the end plate, and a plurality of blade members disposed between the end plate and the shroud. An annular portion of a space between the end plate and the shroud where the blade members are disposed is a pressure-increase flow path. The turbofan causes air to flow from an inner peripheral side to an outer peripheral side of the pressure-increase flow path. A cross-sectional area of the pressure-increase flow path increases gradually from an upstream end toward a downstream end of the pressure-increase flow path.