Scroll Compressor Oil Heating via Discharge Refrigerant Contact
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Solution Overview
Problem
Scroll compressors face challenges with low viscosity oil supply during startup, leading to inadequate lubrication and potential damage to bearings, and existing solutions complicate the structure and increase costs by requiring separate pipes for oil temperature adjustment.
Innovation Solution
A scroll compressor design featuring a muffler hole that connects the discharge space and oil storage space, allowing direct contact and stirring of oil with discharge refrigerant, thereby rapidly increasing oil temperature and preventing low viscosity oil supply without the need for additional pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a separate pipe is branched from the refrigerant pipe to adjust oil temperature, then the oil temperature can be controlled, but the structure becomes more complicated and manufacturing costs increase
Solution Approach 1:
The patent merges the oil temperature adjustment function with the existing refrigerant flow path by forming a communication hole through the discharge cover. This allows the refrigerant to directly contact the oil in the oil storage space, eliminating the need for a separate heating pipe while achieving the same temperature control objective.
Solution Approach 2:
The discharge cover is given multiple functions: it not only seals the discharge space but also provides a communication hole that enables thermal exchange between the refrigerant and oil. This multi-functional design eliminates the need for dedicated temperature control components.
2Temperature
If liquid refrigerant is excessively introduced into the oil storage space, then the oil temperature increases, but the water level of mixed fluid drops and may fall below the oil supply pipe
Solution Approach 1:
The communication hole is positioned at a specific location on the discharge cover that allows controlled thermal exchange without excessive refrigerant introduction. This localized interaction zone enables temperature adjustment while maintaining adequate mixed fluid level in the oil storage space.
3Speed
If low-temperature oil with low viscosity is supplied to bearings, then the components can rotate, but sufficient lubrication cannot be provided and damage may occur
Solution Approach 1:
The system performs preliminary heating of the oil through direct contact with the warm discharge refrigerant before the oil is supplied to the bearings. This preliminary thermal action ensures the oil reaches appropriate viscosity for effective lubrication prior to entering the bearing contact zone.
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 design prevents oil-related damage, simplifies the compressor structure, reduces manufacturing and maintenance costs, and optimizes the Oil Circulation Ratio for preset operation conditions.
Implementation Method 1
allowing direct contact and stirring of oil with discharge refrigerant, thereby rapidly increasing oil temperature
Implementation Method 2
discharge refrigerant...stirred with a discharge refrigerant
Data Source
AI summary
A scroll compressor includes oil in an oil storage space that is brought into direct contact with and stirred with a discharge refrigerant. The scroll compressor includes a fixed scroll, an orbiting scroll coupled to one side of the fixed scroll, and a discharge cover coupled to another side of the fixed scroll and provided with a muffler hole communicating with a refrigerant discharge space and the oil storage space.