Electric Compressor Inverter Layout for Switching Element Cooling
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Solution Overview
Problem
The cooling performance of the switching element in motor-driven compressors needs improvement.
Innovation Solution
A motor-driven compressor design with a switching element comprising a conductive member and a plastic member, arranged in an inverter-accommodating chamber, where a metal heat dissipation member is positioned between the switching element and a partitioning wall, featuring multiple heat dissipation portions to enhance cooling via refrigerant flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the switching element is pressed against the partitioning wall by a pressing fixture, then the switching element can be cooled by fluid, but the cooling performance is insufficient
Solution Approach 1:
A heat dissipation member made of metal is introduced as an intermediary between the switching element and the partitioning wall. This heat dissipation member includes a heat dissipation portion that contacts the switching element and another portion that contacts the partitioning wall, facilitating efficient heat transfer from the switching element to the cooling fluid flowing through the partitioning wall.
Solution Approach 2:
The thermal conductivity parameter is improved by using a metal material for the heat dissipation member, which has higher thermal conductivity compared to the pressing fixture material. This enables more efficient heat dissipation from the switching element to the cooling fluid.
2Ease of manufacture
If the switching element structure is simplified, then manufacturing is easier, but heat dissipation efficiency may be compromised
Solution Approach 1:
The heat dissipation member is integrated with the partitioning wall structure, merging the heat dissipation function into the existing structural component. This integration simplifies manufacturing by eliminating separate heat dissipation components while maintaining effective heat dissipation through the partitioning wall.
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
Improved cooling performance of the switching element through efficient heat dissipation to the partitioning wall, reducing the compressor's size and ensuring effective insulation without increasing its dimensions.
Implementation Method 1
a heat dissipation member made of metal is arranged between the switching element and the partitioning wall. The heat dissipation member includes a first heat dissipation portion arranged between the heat generating portion and the partitioning wall
Implementation Method 2
The switching element is cooled by fluid, drawn into the suction chamber, through the partitioning wall
Data Source
AI summary
A switching element includes a conductive member and a plastic member having a rectangular parallelepiped shape. The plastic member includes a first end surface, a second end surface, and a first side surface. The conductive member includes a heat generating portion exposed on the first side surface. The switching element is arranged in an inverter-accommodating chamber such that the longitudinal direction of the plastic member extends in an axial direction of a rotary shaft. A heat dissipation member made of metal is arranged between the switching element and a partitioning wall. The heat dissipation member includes a first heat dissipation portion arranged between the heat generating portion and the partitioning wall, and a second heat dissipation portion that is continuous with the first heat dissipation portion and arranged between the second end surface and the partitioning wall.