Scroll Compressor Air Guiding Space Integration
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Solution Overview
Problem
Conventional scroll fluid machines face challenges with increased device size and manufacturing costs due to the need for external cooling and supercharging systems, as well as limited temperature tolerance of check valves and insufficient reinforcement of the revolving scroll, leading to mechanical distortion and inefficiencies in cooling performance.
Innovation Solution
A scroll fluid machine design incorporating an intermediate cooler with a radiating pipe in an air guiding space between low-pressure and high-pressure compression chambers, which cools pressurized gas and reintroduces it, along with a compact reinforcement structure for the revolving scroll and integrated cooling fins on the discharge pipe to enhance cooling efficiency and reduce system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an external intermediate cooler is added to cool pressurized gas between compression stages, then the temperature of the gas is reduced, but the device size and manufacturing cost increase
Solution Approach 1:
The intermediate cooler is integrated into the compressor body by utilizing the existing air guiding space between the fixed scroll and cover. The radiating pipe is embedded within this space, merging the cooling function with the existing structural space, thereby avoiding external cooler installation and reducing device size and manufacturing cost.
Solution Approach 2:
The air guiding space originally designed for guiding cooling air to the scrolls is given a dual function: it serves both as a cooling air passage and as a housing for the intermediate cooler. This multi-functional use of space eliminates the need for separate external cooling equipment.
2Productivity
If a blower fan is added for supercharging to improve compression efficiency, then the compression efficiency increases, but the device size and complexity increase
Solution Approach 1:
The blower fan integrated into the driving shaft assembly performs dual functions: it provides cooling air to the scrolls and simultaneously delivers supercharged air to the intake port. This eliminates the need for a separate supercharging device, reducing device size and complexity while maintaining improved compression efficiency.
3Stability of the object's composition
If the revolving scroll is reinforced to prevent mechanical distortion, then the structural stability improves, but the cooling performance deteriorates due to blocked cooling air flow
Solution Approach 1:
The reinforcement ribs are strategically positioned on the back surface of the revolving scroll at locations where structural support is most needed, rather than uniformly across the entire surface. This localized reinforcement provides necessary structural stability while minimizing interference with cooling air flow paths.
Solution Approach 2:
The reinforcement ribs are arranged in an asymmetric pattern that follows the stress distribution and operational requirements of the revolving scroll, rather than using a symmetric uniform pattern. This asymmetric arrangement optimizes structural stability while preserving cooling performance.
4Ease of operation
If check valve means are added between compression stages to prevent reverse flow, then the fluid flow control improves, but the device complexity increases due to temperature limitations
Solution Approach 1:
The check valve means are integrated into the discharge passage structure between compression stages, merging the flow control function with the existing gas passage. This eliminates the need for separate external check valve assemblies, reducing device complexity while maintaining effective fluid flow control.
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 configuration reduces manufacturing costs and installation space by integrating the intermediate cooler within the machine, provides effective cooling across the entire scroll, and prevents mechanical distortion through enhanced reinforcement and cooling performance, while eliminating the need for external cooling devices.
Implementation Method 1
an intermediate cooler configured to cool pressurized gas discharged from the low-pressure-side compression chamber by heat exchange with the cooling air in the air guiding space
Implementation Method 2
cooling air supplied to at least one of the fixed scroll and the revolving scroll can be introduced into the air guiding space
Data Source
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AI summary
A scroll fluid machine includes a compressor body having a first scroll and a second scroll which form a compression chamber, a cover forming an air guiding space by covers at least a portion of the compressor body, and a blower fan supplying cooling air to at least one of the first scroll and the second scroll. A portion of the cooling air is supercharged into the intake port via the air guiding space whereby satisfactory compression efficiency is achieved with a simple configuration.