Compressor
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Solution Overview
Problem
Compressors, particularly the upper compression type, face challenges with lubricant oil mixing with refrigerant, leading to reduced cooling efficiency and the need for frequent oil recovery or separate oil recovery apparatuses, while lower compression type compressors still have significant oil content rates that require separate oil recovery systems.
Innovation Solution
The design incorporates a rotating member and guide within the compressor's centrifugation space to enhance centrifugal separation, utilizing a rotating wing and flange portion to spread centrifugal force and prevent oil from entering the discharge pipe, along with modifications to the first shell's shape and terminal placement to reduce flow resistance and expand the centrifugation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate oil recovery apparatus or oil separator is installed, then oil content rate is reduced, but device complexity increases
Solution Approach 1:
The compressor utilizes its own rotating member (rotor) to generate centrifugal force for oil-separating the refrigerant, enabling self-service oil separation without requiring external oil recovery apparatus or separators
Solution Approach 2:
The rotating member serves dual functions: driving the compression process and generating centrifugal force for oil separation, eliminating the need for separate dedicated oil separation components
2Reliability
If centrifugation space is expanded, then oil separation effectiveness is improved, but volume of compressor increases
Solution Approach 1:
The centrifugation space is merged with the existing discharge space of the compressor, utilizing the available space without requiring additional volume or separate dedicated separation chamber
Solution Approach 2:
The rotating member dynamically generates centrifugal force within the discharge space, enabling effective oil separation without requiring a large static centrifugation chamber
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 approach significantly reduces oil content rates to less than 0.01 weight percent, eliminating the need for separate oil recovery apparatuses and enhancing compressor efficiency by effectively separating refrigerant and oil within the compressor.
Implementation Method 1
a rotating member disposed to spread a rotary power of the rotor to the centrifugation space, thereby providing a centrifugal force to the refrigerant and the oil
Implementation Method 2
the discharge space may be referred to as a centrifugation space. The rotational flow is generated around a center portion of the discharge space, that is, a center portion of the centrifugation space. Thus, centrifugation of the refrigerant and the lubricant oil may occur by such rotational flow
Data Source
AI summary
A compressor includes a case, a driving motor including a stator mounted inside the case and a rotor disposed radially inward of the stator and rotatable, a centrifugation space defined inside the case by one side of the driving motor and the case, a discharge pipe passing through the case and defining a refrigerant inlet hole, a rotation shaft coupled to the rotor to rotate, a compressing portion defined at the other side of the driving motor, where refrigerant is compressed by rotation of the rotation shaft, and a rotating member disposed to spread a rotary power of the rotor to the centrifugation space, thereby providing a centrifugal force to refrigerant and oil. The rotating member is disposed at one side of the rotor to rotate integrally with the rotor.