Rotary Compressor Vane-Integrated Valve to Reduce Overcompression
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Solution Overview
Problem
Existing rotary compressors suffer from inefficiencies due to late opening of discharge ports, leading to overcompression, noise generation, and valve damage from periodic hits, which reduce overall performance.
Innovation Solution
A rotary compressor design featuring a valve member integrated with a vane that selectively opens and closes the discharge port through reciprocal movement, guided by dedicated slots and fastening structures, ensuring timely discharge and minimizing leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a separate valve is used to open and close the discharge port, then the discharge function is achieved, but overcompression occurs and efficiency is reduced
Solution Approach 1:
The valve member is integrated with the vane to form a unified component. The vane and valve member work together as a single integrated unit, where the valve member is positioned on the vane and moves synchronously with it. This integration ensures that the discharge port is opened and closed at the precise moment when the vane reaches its optimal position, preventing overcompression and improving compression efficiency.
2Productivity
If a separate valve is used to control discharge, then discharge control is achieved, but noise is generated and valve damage occurs
Solution Approach 1:
By merging the valve function with the vane structure, the invention eliminates the need for a separate, periodically actuated valve. The integrated valve member moves smoothly with the vane, avoiding periodic impacts and noise generation while maintaining precise discharge control.
3Device complexity
If the valve opens late, then discharge control is simplified, but overcompression occurs reducing efficiency
Solution Approach 1:
The valve member is pre-positioned on the vane at an optimal location. As the vane moves during its reciprocating motion, the valve member automatically opens and closes the discharge port at the precise moment needed, before overcompression can occur. This preliminary positioning ensures timely discharge without requiring complex control mechanisms.
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 compression efficiency by preventing overcompression and reducing noise and valve damage, while maintaining precise control over refrigerant discharge.
Implementation Method 1
a rotary compressor which compresses the refrigerant as the rolling piston rotates eccentrically along the inner wall of the cylinder by forming a compression space
Implementation Method 2
When the pressure of the compression chamber exceeds a defined value, the valve opens the discharge port of the compression chamber. When the pressure of the compression chamber is less than the defined value, the valve closes the discharge port of the compression chamber.
Data Source
AI summary
A rotary compressor includes: a case; a cylinder inside the case and has an internal space, and which includes a rolling piston configured to eccentrically rotate in the internal space, a vane in contact with the rolling piston such that while the vane is in contact with the rolling piston, the internal space of the cylinder is divided into a suction chamber and a compression chamber, a suction port to allow refrigerant to flow to the suction chamber, and a discharge port to allow the refrigerant to be discharged the compression chamber; a drive device that includes a rotation shaft connected to the rolling piston and a motor configured to rotate the rotation shaft; and a valve member that is fixed to a side surface of the vane and selectively opens and closes the discharge port as the vane reciprocates back and forth.