Compressor Discharge Pipe Partition Wall Oil Containment
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Solution Overview
Problem
Existing compressors used in air-conditioners face issues with lubricant oil outflow through the discharge pipe, leading to reduced compressor reliability and refrigeration cycle efficiency, as the upstream end of the discharge pipe is positioned outside the partition member, allowing misty lubricant oil to flow out.
Innovation Solution
A compressor design featuring a tubular partition wall with a balance weight and grooves at the stator and compression mechanism, guiding gas flow to prevent lubricant oil outflow by positioning the discharge pipe upstream end inside the partition wall and using grooves to direct refrigerant and lubricant oil flow paths, ensuring lubricant oil remains within the compressor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the upstream end of the discharge pipe is positioned outside the partition member, then the discharge pipe can be easily installed and the structure is simplified, but misty lubricant oil flows out through the discharge pipe causing reliability degradation
Solution Approach 1:
The partition member acts as an intermediary element that separates the discharge pipe from the misty lubricant oil flow path. By positioning the upstream end of the discharge pipe inside the partition member, the partition member mediates between the discharge function and the oil containment requirement, allowing gas to pass through while blocking misty lubricant oil from entering the discharge pipe.
2Reliability
If the upstream end of the discharge pipe is positioned inside the partition member, then lubricant oil outflow is reduced and reliability is enhanced, but the structure becomes more complex and installation becomes more difficult
Solution Approach 1:
The partition member serves multiple functions simultaneously: it separates the discharge pipe from the misty lubricant oil, provides structural support, and defines the spatial relationship between the compression mechanism and electric motor. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity despite the improved reliability.
3Reliability
If the upstream end of the discharge pipe is positioned inside the partition member, then misty lubricant oil is prevented from flowing out, but the discharge path length increases and energy loss may occur
Solution Approach 1:
The partition member creates a localized separation zone where only the specific region around the discharge pipe upstream end is affected. The partition member's strategic positioning ensures that the discharge path extension is minimal and localized, preventing misty lubricant oil from entering the discharge pipe while maintaining efficient gas flow through the compression mechanism.
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 enhances compressor reliability by reducing lubricant oil outflow and maintaining the efficiency of the refrigeration cycle by effectively guiding and containing lubricant oil within the compressor.
Implementation Method 1
Gas having flowed down through the second flow path flows down while revolving through the clearance
Data Source
AI summary
Provided is, e.g., a compressor with a high reliability. A compressor (100) includes a hermetic container (1) sealed with lubricant oil, an electric motor (6) placed inside the hermetic container (1) and having a stator (6a) and a rotor (6b), a crankshaft (3) configured to rotate integrally with the rotor (6b), a compression mechanism (2) configured to compress refrigerant in association with rotation of the crankshaft (3), a discharge pipe (Pb) configured to guide the refrigerant compressed in the compression mechanism (2) to the outside of the hermetic container (1), and a tubular oil ring (15) provided between the compression mechanism (2) and the electric motor (6). A cutout (s1) is, at a lower portion of the oil ring (15), provided as a first insertion portion into which the discharge pipe (Pb) is inserted.