Indoor Air Outlet Passage Layout for Uniform Blowout Reach
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Solution Overview
Problem
Existing indoor air-conditioning units with rectangular blowout flow passages struggle to uniformly increase air flow speed across the outlet, resulting in limited reach distance, as the speed increase is higher at the ends than at the center, leading to inefficient air distribution.
Innovation Solution
The indoor unit features a blowout flow passage with varying widths in the longitudinal direction, where the second region has a larger width than the first and third regions, allowing for increased air flow speed at the center and ends, ensuring uniform speed distribution and enhanced reach distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the width of the blowout flow passage is reduced around the ends in the longitudinal direction (as in Patent Literature 1), then the air flow speed around the ends is increased, but the air flow speed at the center position is not largely increased, limiting the reach distance
Solution Approach 1:
The blowout flow passage is designed with different widths at different locations: the first and third regions (near ends) have smaller widths to increase air flow speed at ends, while the second region (center) has a larger width to increase air flow speed at center. This local differentiation of geometric properties resolves the contradiction by allowing different regions to have optimized characteristics for their specific flow requirements.
Solution Approach 2:
The blowout flow passage is divided into multiple regions (first region, second region, third region) with different width characteristics. This segmentation allows independent optimization of air flow speed at different locations, enabling both end regions and center region to contribute to increased reach distance simultaneously.
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
This configuration increases air flow speed uniformly across the outlet, enhancing the reach distance of air blown from the air-conditioning unit by balancing speed distribution between the ends and center, outperforming existing designs.
Implementation Method 1
a blowout flow passage connected to the air outlet and configured to guide air subjected to heat exchange at a heat exchanger to the air outlet
Data Source
AI summary
An indoor unit of an air-conditioning apparatus includes an air outlet; and a blowout flow passage connected to the air outlet and guides air subjected to heat exchange at a heat exchanger to the air outlet. In a cross section perpendicular to an air flow direction in the blowout flow passage, the passage has a first end and a second end in a longitudinal direction. The blowout flow passage is divided into first regions, a second region, and third regions. The first regions include the first end and the second end. The second region includes a center position in the longitudinal direction of the passage. The third regions are between the first regions and the second region in the longitudinal direction.