Scroll Compressor Output Adjustment Assembly
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Solution Overview
Problem
Existing scroll compressors lack effective mechanisms for dynamically adjusting output capacity to optimize performance across varying operating conditions, leading to inefficiencies in energy usage and refrigerant management.
Innovation Solution
The compressor incorporates a novel output adjustment assembly with pistons and a valve assembly that selectively isolate and communicate pressure sources with compression pockets, allowing for dynamic modulation of capacity by controlling fluid communication between suction and discharge pressure regions, and utilizing a vapor injection system to enhance capacity adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If scroll compressors use fixed capacity design, then structural simplicity is maintained, but energy efficiency deteriorates under varying operating conditions
Solution Approach 1:
The patent implements dynamic capacity adjustment by making the scroll compressor's output可调 through a capacity adjustment assembly that can vary the compression volume ratio. The system transitions from fixed capacity to variable capacity operation, allowing the compressor to adapt its output to match varying refrigeration demands and optimize energy efficiency across different operating conditions.
Solution Approach 2:
The patent changes the operational parameters of the scroll compressor by introducing a capacity adjustment assembly that modifies the compression pockets' volume and pressure characteristics. By adjusting parameters such as the effective compression volume, discharge timing, and pressure ratio, the system achieves improved energy efficiency without requiring complete redesign of the scroll mechanism.
2Measurement precision
If output adjustment assembly is added to scroll compressor, then capacity control precision is improved, but device complexity increases
Solution Approach 1:
The capacity adjustment assembly is segmented into distinct functional components including a first chamber with a first piston, a second chamber with a second piston, and a valve assembly. Each segment performs a specific function (pressure regulation, volume control, fluid communication management), allowing for precise capacity adjustment while maintaining modularity and facilitating easier maintenance.
Solution Approach 2:
The patent introduces intermediary elements such as the valve assembly and piston-seal systems that mediate between the suction and discharge pressure regions. These intermediaries enable precise control over refrigerant flow and compression parameters without requiring direct mechanical intervention in the scroll compression mechanism itself.
3Loss of substance
If pistons are used to isolate pressure sources, then refrigerant management is improved, but manufacturing complexity increases
Solution Approach 1:
The piston assemblies are designed to automatically respond to pressure differential changes within the compressor. The pistons self-adjust their positions based on the balance between spring force and pressure differential force, enabling automatic refrigerant management without requiring external control systems or complex manufacturing processes for active control mechanisms.
Solution Approach 2:
The patent utilizes pneumatic principles by employing pressure differential forces acting on the pistons to control refrigerant flow and isolation. The first and second pistons are driven by pressure differences between suction and discharge regions, converting pressure energy into mechanical displacement to achieve precise refrigerant management and capacity 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 solution enables precise control over compressor output, improving energy efficiency and refrigerant management by allowing for reduced capacity during low demand and increased capacity when needed, thereby optimizing performance across different operating conditions.
Implementation Method 1
The first piston may be in its second position when the second passage is in communication with the second pressure source. The second piston may be in its second position when the fourth passage is in communication with the second pressure source.
Implementation Method 2
The compressor output adjustment assembly may include a first biasing member engaged with the first piston to bias the first piston to its first position and a second biasing member engaged with the second piston to bias the second piston to its first position.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A compressor may include a housing, first and second scroll members, and a compressor output adjustment assembly. The first scroll member may define a first chamber having first and second passages in communication therewith, a second chamber having third and fourth passages in communication therewith, and first and second apertures. The first and third passages may be in communication with a first pressure source and the second and fourth passages may be selectively in communication with a second pressure source. The compressor output adjustment assembly may include a first piston located in the first chamber and displaceable between first and second positions and a second piston located in the second chamber and displaceable between first and second positions. The first piston may isolate the first aperture from the first passage and the second piston may isolate the second aperture from the third passage when in their respective second positions.