Dual-Seal Cooling Channel Layout for Leak-Resistant Power Circuits
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Solution Overview
Problem
Existing electric circuit devices with power semiconductor modules face challenges in preventing coolant leakage from the cooling channel, which can lead to corrosion of electric components and other issues.
Innovation Solution
The electric circuit device incorporates a dual seal structure for the cooling channel discharge port, including a first seal portion and a second seal portion, along with a through hole and a wall to regulate coolant leakage and prevent it from entering the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a double seal structure is used to seal the cooling channel discharge port, then the reliability of preventing cooling water leakage is improved, but the device complexity increases
Solution Approach 1:
The seal structure is divided into two distinct seal portions: a first seal portion that seals between the discharge port and the cooling channel, and a second seal portion that seals between the discharge port and the case. This segmentation allows each seal to address a specific leakage path, improving overall reliability while maintaining manageable complexity through functional division.
Solution Approach 2:
The invention adds a radial dimension to the sealing approach by providing seal portions at different radial positions relative to the discharge port. The first seal portion is positioned at a first radial distance while the second seal portion is positioned at a second radial distance, creating a multi-layered sealing barrier that addresses leakage from multiple angles and paths.
2Adaptability or versatility
If a wide space is provided in the lower case for accommodating electric components and cooling channel, then the adaptability of the device is improved, but the risk of cooling water leakage and corrosion of electric components increases
Solution Approach 1:
The invention implements preliminary protective action by providing multiple seal portions at the discharge port before cooling water can leak into the case and reach the electric components. The first and second seal portions create preventive barriers that stop leakage at the source, countering the potential harmful effect before it can affect the accommodated components.
Solution Approach 2:
The seal portions act as intermediary elements between the cooling channel discharge port and the case interior. These intermediaries prevent direct contact between cooling water and the electric components housed in the case, thereby protecting the components from corrosion while maintaining the wide space needed for component accommodation.
Data Source
AI summary
An electric circuit device includes: a first electric component; a first case that accommodates the first electric component and has a cooling channel for cooling the first electric component and a discharge port of the cooling channel; a second case that accommodates a second electric component and has a communication channel that communicates with a discharge port of the cooling channel; a first seal portion that is provided in a peripheral edge part of a discharge port of the cooling channel and seals the first case and the first electric component; a second seal portion that is provided outside the first seal portion with respect to a discharge port of the cooling channel and seals the first case and the first electric component; a through hole that is provided in the first case between the first seal portion and the second seal portion of and penetrates the first case from the first electric component side to the second case side; and a wall that is provided on one of the first case and the second case to surround a periphery of a discharge port of the cooling channel, and the through hole is provided outside the wall.