Electronic Control Housing Layout for Dust-Safe Forced Cooling
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Solution Overview
Problem
In electronic control devices, the integration of a blower for forced air cooling leads to concerns about foreign substances like dust being mixed into the printed circuit board due to wind from the blower, which existing solutions do not adequately address.
Innovation Solution
An electronic control device design featuring a housing with a support member, heat radiation fins, a blower positioned to intersect with the fins, a wall portion with a groove for wiring, and a cover with a protrusion that fits into the groove to reduce the gap and prevent foreign substance ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a blower is provided for forced air cooling, then heat radiation properties are improved, but foreign substances such as dust may be mixed into the board via wiring paths
Solution Approach 1:
The housing is divided into multiple compartments by partition walls. One compartment houses the blower while another houses the board, physically separating the dust-generating area from the sensitive electronic components area.
Solution Approach 2:
Wiring paths are routed through designated channels or conduits that act as intermediaries between the blower and the board. These channels guide the wiring away from direct dust exposure while maintaining electrical connectivity.
2Reliability
If wiring is laid on the board surface for blower control, then electrical connection is achieved, but foreign substances can enter via the wiring path
Solution Approach 1:
The wiring is nested within protective channels or conduits that are integrated into the housing structure. This nested arrangement protects the wiring and surrounding areas from dust while maintaining access for electrical connection.
Solution Approach 2:
Instead of laying wiring on the two-dimensional board surface, the wiring path is routed through a third dimension by utilizing vertical channels or conduits within the housing structure, removing the wiring from the dust-prone plane.
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
Effectively suppresses the mixing of foreign substances into the board without additional components, reducing costs and assembly complexity while enhancing reliability.
Implementation Method 1
a blower that is provided in a direction intersecting an extension direction of the fin, and blows wind to the fin
Implementation Method 2
a fin that is provided on a surface opposite to a surface of the support member on which the board is supported
Data Source
AI summary
An electronic control device for suppressing mixing of foreign substances includes a control board including a heat generation component, a housing, a support member that is provided in the housing and supports the board, a heat radiation fin on a surface opposite to a surface of the support member on which the control board is supported, an air cooling fan that intersects an extension direction of the heat radiation fin, and blows wind to the heat radiation fin, a wall portion between the control board and the air cooling fan, and extending from the support member toward the control board, a wiring passage at a top end of the wall portion, a wiring that is laid in the wiring passage, and electrically connects the air cooling fan and the control board, and a cover that covers the housing, and includes a protrusion fitted in the wiring passage.