Compressor Biasing Passage and Bypass Porting Design
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Solution Overview
Problem
Existing compressors face inefficiencies in fluid compression due to limitations in the design of scroll members and the communication of bypass porting, leading to suboptimal fluid handling and pressure distribution during the compression cycle.
Innovation Solution
The compressor design incorporates a non-orbiting second scroll member with a biasing passage and bypass porting system, where the biasing passage is strategically located relative to the spiral wraps to facilitate axial displacement and communication with intermediate pockets, allowing for progressive fluid compression and efficient discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bypass porting is used to improve fluid handling, then compression efficiency is improved, but pressure distribution becomes suboptimal
Solution Approach 1:
The bypass porting is segmented into multiple ports positioned at different locations around the spiral wrap, allowing different regions of the compression chamber to be bypassed at different stages of the compression cycle. This segmentation enables optimized fluid handling while maintaining balanced pressure distribution across the scroll members.
Solution Approach 2:
Different regions of the compression chamber are treated differently through strategically positioned bypass ports. Certain local areas allow fluid bypass while other regions maintain full compression, creating locally optimized pressure conditions that collectively improve overall compression efficiency without compromising pressure distribution.
2Productivity
If scroll members are designed with complex bypass porting, then fluid handling is improved, but device complexity increases
Solution Approach 1:
The bypass porting structure serves multiple functions simultaneously: it controls fluid bypass timing, regulates pressure distribution, and maintains structural integrity of the scroll member. This multi-functionality reduces the need for additional separate components, thereby improving fluid handling without proportionally increasing device complexity.
Solution Approach 2:
The bypass porting is integrated directly into the scroll member structure rather than being a separate component. The ports are formed as part of the spiral wrap geometry, merging the bypass function with the structural element, which simplifies the overall device while enabling sophisticated fluid handling.
3Productivity
If biasing passage is positioned to maximize compression, then compression efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The biasing passage is positioned asymmetrically relative to the bypass ports and spiral wrap, creating an optimized compression sequence where pockets are sealed and compressed in a specific asymmetric pattern. This asymmetric positioning maximizes compression efficiency while the positions are designed to be manufacturable using standard tolerances.
Solution Approach 2:
The biasing passage is pre-positioned to initiate compression of fluid pockets before they reach the discharge region. By establishing the compression sequence in advance through strategic passage placement, the system achieves high compression efficiency without requiring extremely precise manufacturing tolerances, as the compression process is predetermined by the geometry.
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 proper fluid handling and pressure distribution, enabling effective compression and discharge through the strategic placement of biasing passages and bypass ports, optimizing the compression cycle.
Implementation Method 1
The biasing passage may be in communication with the bypass porting during a portion of a compression cycle of the compressor. The seal and the second scroll member may define an axial biasing chamber in communication with the biasing passage.
Data Source
AI summary
A compressor may include a first scroll member, a second scroll member and a seal engaged with the second scroll member. The first scroll member may include a first end plate having a first spiral wrap extending therefrom. The second scroll member may be supported relative to the first scroll member and may include a second end plate having a second spiral wrap extending therefrom and meshingly engaged with said first spiral wrap. The second end plate may define a discharge port, bypass porting and a biasing passage. The biasing passage may be in communication with the bypass porting during a portion of a compression cycle of the compressor. The seal and the second scroll member may define an axial biasing chamber in communication with the biasing passage.