Electric Compressor Inverter Layout for Indirect Cooling
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Solution Overview
Problem
Existing electric compressors face inefficiencies in cooling the inverter components, particularly the second heat generation components, which are not easily cooled due to their arrangement relative to the suction chamber.
Innovation Solution
The electric compressor design includes a housing configuration with a separation wall separating the suction chamber from the inverter accommodating chamber, positioning the second heat generation components in a peripheral space perpendicular to the axial direction of the motor housing, and using a heat transferring member, such as a potting material, to facilitate heat transfer to the motor housing, which is cooled by refrigerant in the suction chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the second heat generation component is accommodated in the second accommodating space located outside the motor housing, then the inverter can be compactly arranged, but the heat generation component cannot be easily cooled by the suction chamber
Solution Approach 1:
The motor housing serves as an intermediary heat transfer medium between the second heat generation component and the suction chamber. The heat transferring member (potting material) facilitates thermal conduction from the heat generation component through the motor housing to the cooling refrigerant in the suction chamber, enabling indirect cooling while maintaining spatial separation.
Solution Approach 2:
The cooling system utilizes the refrigerant fluid circulating through the suction chamber to absorb heat from the motor housing. The fluid-based heat transfer mechanism allows thermal energy to be removed from the heat generation component through the intermediary motor housing structure.
2Temperature
If the heat generation component is positioned in the outer peripheral accommodating space perpendicular to the axial direction, then cooling efficiency is improved, but vibration in the inverter accommodating space increases
Solution Approach 1:
The motor housing acts as a vibration isolation intermediary between the heat generation component and the inverter accommodating space. By positioning the heat generation component in the outer peripheral space and using the motor housing as a buffer, the design achieves effective cooling while reducing vibration transmission to the inverter components.
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 efficiently cools the second heat generation components and reduces vibrations in the inverter accommodating space, enhancing the overall performance and stability of the electric compressor.
Implementation Method 1
a heat transferring member is provided between the motor housing and the heat generation component, and the heat transferring member is in contact with both of the motor housing and the heat generation component
Data Source
AI summary
An electric compressor includes a compression part, an electric motor, an inverter, and a housing having a motor housing defining a suction chamber, an inverter housing defining an inverter accommodating chamber, and a separation wall. The inverter accommodating chamber has a first accommodating space and a second accommodating space. The inverter has a heat generation component in the second accommodating space. The second accommodating space has an outer peripheral accommodating space that is disposed next to the suction chamber with the motor housing interposed therebetween. The heat generation component is accommodated in the outer peripheral accommodating space. A heat transferring member is provided between the motor housing and the heat generation component. The heat transferring member is in contact with the motor housing and the heat generation component.