Refrigerant Jacket Recess Structure for Power Device Insulation
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Solution Overview
Problem
Conventional refrigeration apparatuses require an insulation sheet between the refrigerant jacket and power device lead sections, increasing costs and complexity, while existing solutions fail to ensure adequate insulation without this sheet.
Innovation Solution
A refrigeration apparatus design featuring a refrigerant jacket with a contact portion and recessed portions that maintain insulation distances from the lead sections, eliminating the need for an insulation sheet by ensuring effective thermal conductivity and insulation through the jacket's design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulation sheet is provided between the refrigerant jacket and the power device lead sections, then insulating properties are ensured, but cost increases and manufacturing complexity increases
Solution Approach 1:
The patent extracts and eliminates the insulation sheet from the system by incorporating the insulation function directly into the refrigerant jacket structure through recessed portions, thereby reducing component count and manufacturing complexity while maintaining insulating properties
Solution Approach 2:
The patent merges the insulation function with the refrigerant jacket structure by forming recessed portions that create insulation distances, combining two previously separate functions (cooling and insulation) into a single integrated component
2Reliability
If an insulation sheet is provided between the refrigerant jacket and the power device lead sections, then insulating properties are ensured, but manufacturing cost increases
Solution Approach 1:
The patent removes the separate insulation sheet component and integrates its function into the refrigerant jacket, eliminating material costs and reducing overall manufacturing expenses
Solution Approach 2:
The refrigerant jacket is designed to perform multiple functions: cooling the power device through thermal contact with the device body, and providing insulation from lead sections through recessed portions, reducing the need for additional insulating materials
3Temperature
If the refrigerant jacket directly contacts the power device, then cooling efficiency is improved, but insulation distance to lead sections is reduced
Solution Approach 1:
The patent applies different spatial relationships to different parts of the power device: direct contact at the device body for efficient cooling, and recessed portions at the lead section areas for maintaining insulation distance, optimizing both thermal and electrical performance locally
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
The design effectively cools the power device by refrigerant flow while maintaining insulation distances, reducing costs and complexity by omitting the insulation sheet, and enhancing manufacturing efficiency through extrusion molding.
Implementation Method 1
a refrigerant jacket which has a facing surface that is in contact with the power device and faces the printed wiring board, the refrigerant jacket cooling the power device by refrigerant flowing in a cooling portion
Data Source
AI summary
A facing surface of a refrigerant jacket includes a contact portion which contacts a device main body, a first recessed portion which faces a first lead section and secures an insulation distance to the first lead section due to being positioned further away from a power device than the contact portion, and a second recessed portion which faces the second lead section and secures an insulation distance to the second lead section due to being positioned further away from the power device than the contact portion.