Scroll Compressor Oil Supply Valve for Adaptive Lubrication
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Solution Overview
Problem
Existing scroll compressor oil supply configurations fail to dynamically adjust oil injection quantity according to varying operating conditions, leading to inefficiencies such as excessive oil circulation reducing heat exchange efficiency and lubrication insufficiency under different load conditions.
Innovation Solution
A scroll compression mechanism with an adjusting valve and fluid pressure passage that adjusts oil supply based on pressure differences between the central compression chamber and suction chamber, allowing dynamic adjustment of oil injection quantity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed oil supply configuration is used, then the structure is simple, but the oil circulation rate cannot be adjusted according to working conditions, leading to excessive oil injection under rated or light load conditions which reduces heat exchange efficiency and causes oil accumulation at discharge port
Solution Approach 1:
The patent applies the dynamics principle by introducing a movable valve body that can dynamically adjust its position to change the flow cross-sectional area of the oil supply passage. The valve body moves in response to pressure differences between discharge and suction sides, enabling the oil circulation rate to adapt dynamically to varying working conditions rather than remaining fixed
Solution Approach 2:
The patent implements feedback by using the pressure difference between the discharge side (first pressure source) and suction side (second pressure source) to automatically control the valve body position. This creates a closed-loop system where the oil supply configuration responds to system operating conditions, adjusting oil injection quantity based on real-time pressure feedback without requiring external control mechanisms
2Reliability
If excessive lubricating oil is supplied to the compression mechanism, then lubrication performance is improved, but heat exchange efficiency is reduced and lubricating oil accumulates around the discharge valve assembly and discharge recess
Solution Approach 1:
The patent applies parameter changes by varying the oil supply quantity parameter according to working conditions. Through the adjusting valve, the system dynamically modifies the oil circulation rate parameter, reducing it under rated or light load conditions to prevent oil accumulation and maintain heat exchange efficiency, while increasing it under severe conditions to ensure adequate lubrication
3Productivity
If too little lubricating oil is injected under severe working conditions, then heat exchange efficiency is maintained, but the compression mechanism experiences insufficient lubrication, increased wear, and reduced stability
Solution Approach 1:
The patent uses parameter changes to adjust the oil supply quantity in response to severe working conditions. When discharge and suction pressure differences indicate high load or high temperature, the system automatically increases the oil circulation rate parameter through valve body movement, ensuring sufficient lubrication to maintain compression mechanism stability and prevent excessive wear
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
Enhances compressor reliability and energy efficiency by ensuring appropriate oil circulation rates under varying conditions, preventing lubrication issues and improving discharge stability.
Implementation Method 1
a fluid pressure passage, which includes a first end and a second end, where the first end is in fluid communication with a first pressure source to apply a first pressure to a first side end of the movable valve body, the second end is in fluid communication with a second pressure source to apply a second pressure to a second side end of the movable valve body, so that based on a pressure difference between the first pressure and the second pressure the movable valve body can selectively move
Data Source
AI summary
Disclosed are a scroll compression mechanism and a scroll compressor. The scroll compression mechanism comprises a non-orbiting scroll member, an orbiting scroll member, an oil supply passage, an adjusting valve and a fluid pressure passage comprising a first end and a second end. The first end is in fluid communication with a first pressure source to apply a first pressure to the movable valve body, the second end is in fluid communication with a second pressure source to apply a second pressure to the movable valve body, so that based on a pressure difference between the first and second pressures the movable valve body can selectively move toward a first direction of reducing a flow cross-sectional area of the oil supply passage and toward a second direction of increasing the flow cross-sectional area of the oil supply passage, thereby adjusting an oil supply amount to the scroll compression mechanism.