2-Cylinder Rotary Compressor Intake Layout for Lower Pressure Loss
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Solution Overview
Problem
Existing 2-cylinder rotary compressors face challenges in efficiently distributing refrigerant flow, leading to pressure loss and limitations in design flexibility due to direct connections of intake pipes, which hinder the reduction of cylinder thickness and overall compressor size.
Innovation Solution
A 2-cylinder rotary compressor design featuring a main flow path and branch flow paths branching into each cylinder, with optimized flow path areas and connection ports, allowing for thinner cylinders and reduced pressure loss, while increasing design freedom and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single intake pipe directly connects to both cylinder chambers through a partition plate, then the structure is simple, but pressure loss increases and design flexibility is limited
Solution Approach 1:
The single intake pipe is segmented into two separate branch flow paths that independently connect to each cylinder chamber. This segmentation allows optimized flow distribution to each cylinder, reducing pressure loss while maintaining structural simplicity through the use of a common intake pipe that branches within the compressor body.
Solution Approach 2:
A branch flow path structure is introduced as an intermediary between the intake pipe and the two cylinder chambers. This intermediary component optimizes refrigerant distribution by providing dedicated flow paths to each cylinder, reducing pressure loss without requiring separate external intake pipes for each cylinder.
2Volume of moving object
If the cylinder thickness is reduced to decrease compressor size, then the overall dimensions are reduced, but manufacturing precision and flow path optimization become more difficult
Solution Approach 1:
The flow paths are designed to extend in multiple dimensions within the thin cylinder structure. By utilizing three-dimensional space efficiently, the patent achieves optimized flow distribution and adequate flow path areas even with reduced cylinder thickness, maintaining manufacturing feasibility while decreasing overall compressor size.
Solution Approach 2:
The branch flow paths are nested within the cylinder structure, with flow paths arranged concentrically or in layered configurations. This nesting allows multiple flow paths to coexist within limited space, enabling thin cylinder design while maintaining sufficient flow path areas for efficient refrigerant distribution.
3Loss of energy
If separate intake pipes are used for each cylinder, then flow distribution is optimized, but device complexity and manufacturing costs increase
Solution Approach 1:
Two separate intake pipe functions are merged into a single intake pipe with internal branching. The unified intake pipe structure provides separate flow paths to each cylinder through branch flow paths formed within the compressor body, reducing the number of external components while maintaining optimized flow distribution to minimize pressure loss.
Data Source
AI summary
A 2-cylinder rotary compressor includes a head to which an intake pipe is connected; a first cylinder in which a first piston rotates eccentrically inside; a second cylinder in which a second piston rotates eccentrically inside; a middle plate provided between the first cylinder and the second cylinder; a main flow path penetrating from the intake pipe through the head, the first cylinder, and the middle plate to the second cylinder; a first branch flow path branching from the main flow path into an interior of the first cylinder; and a second branch flow path branching from the main flow path into an interior of the second cylinder.