Refrigerant Compressor Unit
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Solution Overview
Problem
Existing refrigerant compressor units are not sufficiently lightweight and compact to be effectively used as transcritical CO2 compressors.
Innovation Solution
The refrigerant compressor unit is designed with a cylinder head made from cast iron with spheroidal or vermicular graphite for stability, and the housing sleeve, compressor housing portion, cylinder housing block, and motor housing portion are manufactured as a single-piece part from lightweight materials like aluminum alloys to achieve a balance between stability and weight reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cylinder head is manufactured from cast iron for stability, then the stability and strength are improved, but the weight increases
Solution Approach 1:
The patent applies local quality by using cast iron specifically for the cylinder head where high stability and strength are required, while using lightweight materials (aluminum or plastic) for other housing components. This selective material assignment optimizes the weight-strength balance by giving each component the material properties most suitable for its specific functional requirements.
Solution Approach 2:
The patent employs composite material strategy by combining different materials in a single compressor unit - cast iron for the cylinder head and lightweight materials for the housing. This multi-material approach allows the system to achieve both the structural integrity needed for compression stability and the weight reduction necessary for mobile applications.
2Weight of moving object
If the housing components are manufactured as a single-piece part from lightweight material, then the weight is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the housing sleeve, compressor housing portion, cylinder housing block, and motor housing portion into a single integrated component manufactured as one piece. This consolidation eliminates the need for multiple separate parts and assembly operations, reducing overall weight while the use of lightweight materials further contributes to weight reduction despite the increased manufacturing complexity.
3Volume of moving object
If the compressor unit is designed to be compact, then the volume is reduced, but the stability and strength may be compromised
Solution Approach 1:
The patent applies local quality by concentrating high-strength materials (cast iron) in the cylinder head where structural strength is most critical for withstanding compression forces, while using lightweight materials for the housing. This localized strengthening allows the unit to maintain adequate strength in a compact form factor without unnecessarily increasing overall volume.
Data Source
AI summary
In order to make a refrigerant compressor unit as light and compact as possible so that it can be used as a transcritical CO2 compressor, it is proposed that the cylinder head is manufactured from a cast material comprising iron and that the housing sleeve, the compressor housing portion and a cylinder housing block, which accommodates the cylinders, as well as the motor housing portion form a single-piece part, in particular made of lightweight material.