Rotary Compressor Equal-Height Chamber Design to Reduce Blade Load
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Solution Overview
Problem
Conventional rotary compressors face issues with decreased reliability and increased size due to the larger excluded volume of the first compression chamber, which leads to higher loads on blades and necessitates a larger compression mechanism unit.
Innovation Solution
The rotary compressor design includes a sealed container with a low-pressure side and high-pressure side compression chambers of equal height, where the low-pressure side chamber has a larger inner diameter, and a partition plate with optimized thickness and recessed portions to maintain rigidity and prevent refrigerant leakage, along with a crankshaft configuration that minimizes expansion and improves efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the height of the first compression chamber is increased to increase its excluded volume, then the excluded volume of the first compression chamber is increased, but the height of the first blade is increased which increases the load on the blade and decreases reliability
Solution Approach 1:
The patent transitions from increasing volume through height (vertical dimension) to increasing volume through inner diameter (radial dimension). By making the low-pressure side compression chamber have a larger inner diameter while maintaining equal heights, the excluded volume is increased without increasing blade height, thus avoiding increased blade load and maintaining reliability.
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 prevents a decrease in reliability and allows the compressor to be downsized while maintaining high efficiency by optimizing the compression mechanism unit's dimensions and reducing the excluded volume.
Implementation Method 1
a crankshaft, having a low-pressure side eccentric portion and a high-pressure side eccentric portion, configured to be rotationally driven around the central axis by the electric motor unit
Implementation Method 2
a low-pressure side compression chamber that compresses introduced gaseous refrigerant and discharges the compressed refrigerant gas
Data Source
AI summary
A rotary compressor is provided that can prevent decrease in reliability of a multi-stage compression mechanism unit and can be downsized. A compression mechanism unit of a compressor includes: a low-pressure side cylinder having a low-pressure side compression chamber that compresses introduced gaseous refrigerant and discharges the compressed refrigerant gas by power of a low-pressure side eccentric portion; a high-pressure side cylinder having a high-pressure side compression chamber that compresses the refrigerant discharged from the low-pressure side compression chamber by power of a high-pressure side eccentric portion; and a partition plate provided between the low-pressure side cylinder and the high-pressure side cylinder, wherein a height of the low-pressure side compression chamber is the same as a height of the high-pressure side compression chamber, and an inner diameter dimension of the low-pressure side compression chamber is larger than an inner diameter dimension of the high-pressure side compression chamber.