Power Equipment Case Levee Wall Intake Airflow
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Solution Overview
Problem
In power equipment units, especially those in vehicles, warmed air from high-heat members like exhaust pipes can be sucked into intake ports, leading to inefficient cooling of batteries and other components, potentially causing performance degradation.
Innovation Solution
A case structure with a levee wall positioned in front of the intake port, ensuring that warmed air is prevented from being sucked in, and the intake port is located higher than the surrounding surface, preventing direct suction of air from the lid member or carpet, while also providing a groove to divert liquids away from the intake area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the intake port is positioned low to maximize cooling air intake, then cooling efficiency is improved, but warmed air from the lid member or carpet is suctioned in reducing cooling effectiveness
Solution Approach 1:
The lid member is designed with locally differentiated properties: a recessed cover member disposing part that creates a localized depression, and a thermal insulation layer with varying thickness. These local modifications create a temperature gradient and physical barrier that prevents warmed air from reaching the intake port while preserving cooling air intake at the lower intake port position.
Solution Approach 2:
The cover member disposing part is designed as a recessed structure that preliminarily captures and isolates warmed air before it can reach the intake port. The thermal insulation layer is pre-positioned to prevent heat transfer to the lid member surface, thereby preventing warmed air formation in advance.
2Ease of manufacture
If the lid member is covered with carpet to improve interior aesthetics and comfort, then design quality is improved, but warmed air accumulates on the carpet surface and is suctioned into the intake port
Solution Approach 1:
The thermal insulation layer is strategically positioned between the carpet and the lid member in areas where warmed air would accumulate. This localized insulation approach maintains the aesthetic carpet covering while preventing heat transfer to the lid member surface, thereby eliminating the source of warmed air without compromising interior design quality.
Solution Approach 2:
The thermal insulation layer acts as an intermediary between the carpet and the lid member, blocking heat transfer from the lid member to the carpet. This prevents the carpet from becoming a source of warmed air that would be suctioned into the intake port, while allowing the carpet to maintain its aesthetic function.
3Productivity
If the intake port is positioned close to the lid member surface to maximize air flow, then cooling performance is improved, but liquid infiltration risk increases
Solution Approach 1:
The sealing structure is segmented into multiple components: a sealing member that directly contacts the lid member surface, and a sealing groove that positions and protects the sealing member. This segmentation allows the sealing function to be optimized independently from the air intake function, maintaining close proximity for cooling performance while providing dedicated liquid barrier structures.
Solution Approach 2:
The sealing member acts as an intermediary element between the intake port and the external environment. It allows air to pass through to the intake port while blocking liquid infiltration, thereby decoupling the cooling performance requirement from the liquid protection requirement.
Data Source
AI summary
A case structure of a power equipment unit, which accommodates a power equipment mounted in a vehicle and is disposed in a power equipment unit accommodating part provided on a floor panel, includes: a case body having an upper portion opened to accommodate the power equipment; a lid member which covers the upper portion of the case body; and a cover member which is attached to the lid member and covers at least an opening part formed in the lid member. The cover member has an intake port which takes in air from outside, and a levee wall is provided in front of the intake port.