Compressor
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Solution Overview
Problem
In compressors, oil sealed into the refrigerant discharge pipe can cause backflow or overflow due to inadequate sealing, leading to increased manufacturing time and costs, and reduced motor efficiency due to enlarged clearances that affect the stator coil's flux path area.
Innovation Solution
A scroll compressor design with a refrigerant discharge pipe that includes a communication hole between its inlet and outlet, allowing for effective oil sealing without a separate oil separator, ensuring the stator coil's efficiency and reducing oil leakage by optimizing the pipe's insertion depth and hole configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate oil separation device is installed inside the casing, then oil separation effect is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The refrigerant discharge pipe is designed to perform both refrigerant discharge and oil separation functions simultaneously. The pipe structure includes an oil separation space formed by the pipe wall and casing, eliminating the need for a separate oil separation device while maintaining effective oil separation through the pipe's geometric configuration.
Solution Approach 2:
The refrigerant discharge pipe is transformed into a multi-functional component that serves as both the refrigerant discharge conduit and the oil separation device. The pipe's structure creates an oil separation space that utilizes the same spatial volume that would otherwise be occupied by a separate oil separation component.
2Reliability
If the refrigerant discharge pipe is extended toward the compression part, then oil separation effect is improved, but discharge resistance increases and manufacturing time increases
Solution Approach 1:
Instead of extending the pipe length in the longitudinal direction (which would increase manufacturing time), the oil separation function is achieved by utilizing the radial dimension. The pipe creates an oil separation space by extending in the radial direction toward the compression part, allowing oil separation without proportionally increasing the pipe's longitudinal length.
3Ease of manufacture
If the refrigerant discharge pipe inlet is positioned close to the driving motor, then manufacturing cost is reduced, but oil backflow and overflow occur
Solution Approach 1:
The refrigerant discharge pipe is segmented into functional zones: an oil separation space formed by the pipe wall and casing, and a refrigerant discharge passage. This segmentation allows the pipe inlet to be positioned close to the driving motor for ease of manufacture while the separated oil is contained in the oil separation space, preventing backflow into the refrigerant discharge path.
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
The solution effectively suppresses oil backflow and overflow, maintains motor efficiency, and simplifies the compressor structure to reduce manufacturing costs by ensuring proper oil sealing and minimizing oil leakage during operation.
Implementation Method 1
A communication hole communicating with the upper space is provided in a middle portion of the refrigerant discharge pipe, so that even when the inlet of the refrigerant discharge pipe is blocked, the upper space of the casing is sealed
Data Source
AI summary
The present disclosure relates to is a compressor. The compressor may be provided with a communication hole between an inlet and an outlet of a refrigerant discharge pipe coupled through an upper surface of a casing, the communication hole penetrating between an outer circumferential surface and an inner circumferential surface of the refrigerant discharge pipe. Thus, during oil sealing through the refrigerant discharge pipe, a flux path area of a driving motor may be ensured, and a number of winding wires and/or a coil diameter of a stator coil may be ensured. Thus, efficiency of the driving motor may be maintained and backflow or overflow of oil through the refrigerant discharge pipe may be suppressed. In addition, during operation of the compressor, oil may be suppressed from being excessively leaked through the refrigerant discharge pipe without having to include a separate oil separator inside or inside the casing.