Nonlinear Air Hole for UV Protection in EV Power Control
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Solution Overview
Problem
Existing electricity feeding control devices for electrical automobiles face issues with deterioration and damage of the inner pressure adjusting sheet due to direct exposure to ultraviolet light and accidental contact during maintenance, which can lead to impaired air ventilation and potential blockages.
Innovation Solution
The device features a housing case with a nonlinearly shaped air hole that prevents ultraviolet light from reaching the inner pressure adjusting sheet and includes a shielding plate to protect it from accidental contact, ensuring the sheet's integrity and maintaining air ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a straight-tube-shaped air hole is provided in the housing case, then air ventilation between inside and outside of the housing case is achieved, but ultraviolet light directly illuminates the inner pressure adjusting sheet causing deterioration
Solution Approach 1:
The air hole channel is formed into a curved shape instead of a straight tube, bending the path from the outer surface to the interior. This curvature redirects ultraviolet light away from the inner pressure adjusting sheet while maintaining air flow capability, thus resolving the contradiction between ventilation function and UV protection.
2Ease of operation
If a straight-tube-shaped air hole is provided in the housing case, then air ventilation is enabled, but the inner pressure adjusting sheet is vulnerable to accidental contact during maintenance
Solution Approach 1:
The curved channel configuration creates a bent path that naturally prevents straight objects from reaching the inner pressure adjusting sheet during maintenance operations, while still allowing air to pass through the curved pathway.
3Object-affected harmful factors
If the air hole channel is formed into a nonlinear shape, then ultraviolet light and foreign matter are prevented from reaching the inner pressure adjusting sheet, but the complexity of the housing case structure increases
Solution Approach 1:
The curved air hole channel provides dual protection: the bent path blocks ultraviolet light and prevents foreign matter insertion, while being integrated directly into the housing case structure without requiring separate protective components, thus limiting the increase in structural complexity.
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 the deterioration of the inner pressure adjusting sheet and reduces the risk of damage during maintenance, ensuring reliable air ventilation and preventing foreign matter from entering the housing case.
Implementation Method 1
an inner pressure adjusting sheet 105, which comprises a porous sheet etc. having breathability and waterproof property
Implementation Method 2
A channel of the air hole, led from the inside to the outside of the housing case, is formed into a nonlinear shape
Implementation Method 3
an air in the inside of the housing case 103 flows out to the outside of the housing case 103 through the inner pressure adjusting sheet 105 and the air hole 131c
Data Source
AI summary
An electricity feeding control device is provided with an air hole (31c) which is formed by penetrating a part of a peripheral wall of a body (31) constituting a part of a housing case (3). The housing case (3) is provided in its inside with an inner pressure adjusting sheet (5), formed with a breathable and waterproof member, and arranged so as to cover the air hole (31c) from the inside of the housing case (3). The air hole (31c) comprises a long recess (31c2) formed in an outer surface of the body (31), a communicating hole (31c1) consecutively formed in one end of a longi-tudinal direction of the recess (31c2) and communicated with an inner surface of the body (31), and a shielding plate (33) attached in the outer surface of the body (31) so as to cover a region other than the other end of the longitudinal direction of the recess (31c2), in a region of an opening section (31c3) of the recess (31c2). That is, a channel of the air hole (31c), led from the inside to the outside of the housing case (3), is formed into a nonlinear shape.