Electrical Connection Box Water-Preventing Rib Design
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Solution Overview
Problem
Conventional electrical connection boxes in vehicles fail to effectively manage and prevent water ingress and accumulation, which can lead to issues such as water adhering to or splashing onto critical components like electric wires.
Innovation Solution
The design incorporates a guiding space with a water-preventing rib that directs water entering the casing vertically downward and away from sensitive components, using an inclined surface to divert water from the avoidance target portion, such as electric wires, thereby preventing contact and splashing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water enters the casing and accumulates in the guiding space, then water can be collected and discharged, but water may adhere to or splash onto electric wires and other components
Solution Approach 1:
The water-preventing rib extends in the vertical direction to create a three-dimensional water guidance structure. By adding this vertical dimension to the water flow path, the rib effectively redirects water away from electric wires while maintaining the two-dimensional guiding space structure.
Solution Approach 2:
The water-preventing rib acts as an intermediary element between the guiding space and the electric wires. It intercepts water flow in the guiding space and redirects it along a safe path, preventing direct contact with the electric wires without requiring complex sealing or isolation mechanisms.
2Ease of manufacture
If the casing structure is simplified without water-preventing ribs, then manufacturing is easier, but water can directly contact and damage electric wires
Solution Approach 1:
Rather than making the entire casing structure complex, the water-preventing rib is introduced as a localized feature only in the guiding space where water accumulation occurs. This allows the rest of the casing to remain simple and easy to manufacture while providing targeted protection where needed.
Solution Approach 2:
The water-preventing rib changes the flow path parameters of water in the guiding space by creating a physical barrier that redirects water along a different trajectory. This parameter change in water flow direction prevents contact with electric wires without requiring fundamental changes to the casing design.
3Reliability
If the water-preventing rib extends far downward, then water is better diverted from electric wires, but the rib may interfere with the bottom proximity part and electronic components
Solution Approach 1:
The water-preventing rib is designed with dynamic adaptability in its positioning. The rib's extension distance and angle can be optimized based on the specific layout of electric wires and components, allowing the structure to adapt to different configurations while maintaining effective water diversion.
Solution Approach 2:
The rib utilizes the vertical dimension to divert water away from electric wires that may be positioned at various heights. By extending vertically rather than only horizontally, the rib can protect wires at different positions without interfering with the bottom proximity part.
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 effectively prevents water from adhering to or splashing onto electric wires and other components, ensuring reliable operation by guiding and discharging water away from critical areas within the electrical connection box.
Implementation Method 1
a guiding space that is partitioned horizontally lateral to the accommodating space therein via a partition wall, that extends in a vertical direction and guides water entered in the casing to a vertically downside
Data Source
AI summary
An electrical connection box applied to a wire harness includes a casing that includes an accommodating space that is formed therein and that accommodates an electronic component, and a guiding space that is partitioned horizontally lateral to the accommodating space therein via a partition wall, and that extends in a vertical direction and guides water entered therein to a vertically downside. The casing includes a water-preventing rib that is provided in the guiding space, and that guides water guided to the vertically downside in the guiding space, in a direction of avoiding from an avoidance target portion that is positioned vertically below the guiding space.