Rotary Compressor Vapor Injection Valve Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotary compressors in climate-control systems face inefficiencies due to the lack of effective fluid injection mechanisms that optimize pressure differentials and fluid flow, leading to suboptimal performance in providing cooling and heating effects.
Innovation Solution
The compressor design incorporates a fluid-injection system with aligned openings and movable valves that respond to pressure differentials, allowing for efficient fluid injection into the compression chamber, enhancing the compressor's ability to manage pressure differentials and improve fluid flow dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fluid-injection system is added to the compressor, then fluid flow efficiency and pressure differential management are improved, but device complexity increases
Solution Approach 1:
The fluid-injection opening is integrated into the discharge opening structure, with the injection opening nested within or adjacent to the discharge opening. This allows the injection system to be incorporated without requiring separate external components, thereby improving fluid flow efficiency while minimizing the increase in device complexity.
Solution Approach 2:
A valve mechanism serves as an intermediary component that controls the injection of flash gas into the compression chamber. This valve regulates the timing and amount of fluid injection, optimizing pressure differential management while keeping the overall system complexity manageable through a single controllable element.
2Temperature
If flash gas is injected at multiple points in the compression chamber, then cooling effect and pressure management are improved, but manufacturing precision requirements increase
Solution Approach 1:
The fluid-injection opening is positioned at multiple locations around the circumferential surface of the cylindrical recess rather than at a single point. This distributed arrangement in the circumferential dimension provides effective cooling throughout the compression chamber while using standard machining operations that do not require excessive manufacturing precision.
Solution Approach 2:
The injection system provides localized cooling at specific points around the compression chamber where heat accumulation occurs. By targeting specific regions rather than requiring uniform distribution, the system achieves effective cooling while maintaining reasonable manufacturing precision standards for the opening positions.
3Productivity
If the fluid-injection opening is aligned with the discharge opening, then fluid flow dynamics are optimized, but ease of manufacture decreases
Solution Approach 1:
The alignment between the fluid-injection opening and discharge opening is optimized for dynamic fluid flow during compressor operation. The openings are positioned to take advantage of the rotating rotor position and pressure differential changes during the compression cycle, enhancing fluid flow dynamics while using fixed geometric relationships that simplify manufacturing.
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 enhances the compressor's efficiency by ensuring effective fluid injection and pressure management, leading to improved performance in climate-control systems by optimizing the compression process and maintaining reliable operation.
Implementation Method 1
The crankshaft may include an eccentric portion. The rotor may be disposed within the cylindrical recess and may engage the eccentric portion of the crankshaft for movement with the crankshaft relative to the cylindrical recess.
Implementation Method 2
The suction opening may provide fluid at a first pressure to the cylindrical recess. The discharge opening may receive compressed fluid from the compression chamber. The fluid-injection opening may provide fluid at a second pressure to the compression chamber. The second pressure may be higher than the first pressure.
Implementation Method 3
The compressor may include a valve movable relative to the cylindrical recess between a first position allowing fluid flow through the fluid-injection opening and a second position restricting fluid flow through the fluid-injection opening. The valve may be movable between the first and second positions in response to a change in a pressure differential between the compression chamber and a fluid-injection source.
Data Source
AI summary
A compressor may include a crankshaft, first and second cylinder housings, first and second rotors, a divider plate, and first and second valves. The crankshaft includes first and second eccentric portions. The cylinder housings define cylindrical recesses. The rotors are disposed within respective cylindrical recesses and engage respective eccentric portions of the crankshaft. The first rotor and the first cylindrical recess define a first compression chamber therebetween. The second rotor and the second cylindrical recess define a second compression chamber therebetween. The divider plate may be disposed between the cylinder housings and may include first and second fluid openings in communication with the first and second compression chambers. The valves may be moveable relative to the divider plate between a first position allowing fluid flow through the fluid openings and a second position restricting fluid flow through the fluid openings.