Scroll Compressor Service Valve Assembly for Capacity Modulation
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Solution Overview
Problem
Existing scroll compressor capacity modulation systems, particularly those using delayed suction approaches, are limited in their ability to dynamically adjust compressor capacity and are constrained by the predetermined position of unloading ports along the scroll wraps, which restricts the flexibility in accommodating varying system loads.
Innovation Solution
A valve assembly is introduced that selectively couples intermediate pressure in the scroll compressor's housing to the suction pressure area, utilizing a solenoid-actuated manifold system with annular and radial grooves and O-rings for fluid connection, allowing for flexible orientation and enhanced flow control between intermediate and suction flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If delayed suction approach with fixed unloading ports is used, then capacity modulation is achieved, but flexibility to accommodate varying system loads is limited
Solution Approach 1:
The patent applies the dynamics principle by making the valve assembly movable relative to the scroll compressor housing. The valve assembly can be positioned at different locations and orientations, allowing dynamic adjustment of the intermediate pressure to suction pressure flow path. This movable configuration enables the system to adapt to varying load conditions without requiring a completely complex redesign, thus improving flexibility while managing device complexity.
Solution Approach 2:
The patent implements parameter changes by allowing the valve assembly to be positioned at different locations and orientations. By changing the spatial parameters (position and orientation) of the valve assembly, the system can modify the flow characteristics and capacity modulation performance. This approach provides flexibility in accommodating varying system loads through parameter adjustment rather than requiring complex structural changes.
2Adaptability or versatility
If predetermined position of unloading ports along scroll wraps is used, then capacity modulation is provided, but flexibility in accommodating varying system loads is restricted
Solution Approach 1:
The patent applies dynamics by transitioning from fixed, predetermined port positions to a movable valve assembly that can be positioned at different locations. This dynamic positioning capability allows the system to accommodate varying system loads flexibly while maintaining ease of manufacture, as the valve assembly can be installed and repositioned without requiring complex manufacturing processes for each specific configuration.
3Productivity
If fixed capacity modulation system is used, then compressor capacity is controlled, but ability to dynamically adjust for varying loads is reduced
Solution Approach 1:
The patent applies the dynamics principle by making the valve assembly movable and repositionable. This allows the system to dynamically adjust compressor capacity in response to varying loads. The valve assembly can be positioned to optimize flow characteristics for different operating conditions, thereby maintaining high productivity while improving dynamic adaptability.
Solution Approach 2:
The patent implements parameter changes by allowing the valve assembly to be positioned at different locations and orientations. By changing these spatial parameters, the system can dynamically adjust capacity modulation performance to match varying load requirements. This approach enables the compressor to maintain optimal productivity across different operating conditions.
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 more dynamic capacity modulation in scroll compressors, allowing for improved flexibility in accommodating varying system loads by effectively connecting intermediate and suction flows, thereby enhancing the compressor's ability to adjust its operational capacity.
Implementation Method 1
The valve assembly can permit intermediate pressure in the shell to flow to an area of suction pressure in the shell
Implementation Method 2
One of the first and second valve manifolds can define a radial groove having an O-ring disposed therein
Data Source
AI summary
A scroll machine can include a shell, a first scroll member, a second scroll member and a valve assembly. The valve assembly can permit intermediate pressure in the shell to flow to an area of suction pressure in the shell. The valve assembly can include a first valve manifold that selectively couples to the shell. A second valve manifold can slidably and non-threadably locate against the first valve manifold. A retainer can couple to the first valve manifold to capture the second valve manifold against the first valve manifold. A valve can selectively connect an intermediate flow exiting the shell through the first and second valve manifolds to a suction flow entering the shell.