Fixed Scroll Bypass Assembly for Simpler Capacity Regulation

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Solution Overview

Problem

Existing capacity regulating mechanisms in scroll compressors have complex structures, high costs, and reliability issues due to numerous sealing surfaces and machining challenges.

Innovation Solution

A fixed scroll assembly with a simplified structure featuring a bypass control mechanism, including pistons, a connection groove, a single seal assembly, and a solenoid valve to regulate capacity, reducing parts and improving reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing capacity regulating mechanisms are used, then capacity regulation function is achieved, but the structure becomes complicated and costly

Engineering Contradiction:

Improvecapacity regulation functionVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the bypass control function directly into the fixed scroll assembly by integrating pistons, connection grooves, and seal assemblies into the existing scroll structure. This eliminates the need for separate bypass control mechanisms, reducing overall device complexity while maintaining capacity regulation functionality through the integrated design where pistons move within the scroll assembly to open/close bypass passages.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fixed scroll assembly serves multiple functions: it provides the compression chamber structure, incorporates the bypass control mechanism, and integrates the seal assembly all within a single component system. The pistons within the scroll assembly simultaneously control bypass passage opening/closing and maintain sealing, making the scroll assembly a multi-functional component that reduces the need for separate dedicated bypass control parts.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If existing capacity regulating mechanisms are used, then capacity regulation function is achieved, but the number of sealing surfaces increases

Engineering Contradiction:

Improvecapacity regulation functionVSAvoidsealing reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent combines multiple sealing functions into a single integrated seal assembly that is part of the fixed scroll structure. Instead of having separate sealing surfaces for bypass control and compression chamber sealing, the seal assembly provides both functions through its integration into the scroll assembly, reducing the total number of sealing interfaces and potential leak paths.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If existing capacity regulating mechanisms are used, then capacity regulation function is achieved, but machining requirements increase

Engineering Contradiction:

Improvecapacity regulation functionVSAvoidmachining difficulty

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent segments the bypass control function into discrete pistons that can be manufactured separately and then assembled into the fixed scroll assembly. The connection grooves are designed as integrated features of the scroll assembly that can be machined in a single operation, and the seal assembly is provided as a separate component. This segmentation allows for easier manufacturing of individual components with standard machining processes rather than requiring complex precision machining of the entire bypass control mechanism as a single integrated part.

Inventive Principle:

Principle #1Segmentation

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

The solution provides a compact, reliable, and cost-effective capacity regulation mechanism with reduced parts and simplified processing, enhancing sealing performance and operational efficiency.

Implementation Method 1

the valve is a solenoid valve and is configured to move to the first position when de-energized and move to the second position when energized

Methodology Applied

Scientific EffectElectromagnetic force: Electromagnet

Implementation Method 2

Each piston is housed in the corresponding piston chamber and is configured to be movable between a sealing position and a released position. In the sealing position, the piston covers the corresponding bypass entry section... In the released position, the piston is away from the bypass entry section

Methodology Applied

Scientific EffectPressure differential: Pressure Gradient

Data Source

PatentUS20250382962A1Fixed scroll assembly and scroll compressor

Publication Date: 2025.12.18 COPELAND CLIMATE TECN (SUZHOU) CO LTD

AI summary

A fixed scroll assembly for a scroll compressor includes a fixed scroll part, at least two bypass inlet sections, piston chambers, bypass discharge channels, pistons, a connecting groove, a sealing assembly, and a bypass control device. The piston chambers are provided on the sides of the corresponding bypass inlet sections and extend to an outer end surface of an end plate. Each piston is housed in the corresponding piston chamber, and is configured to be movable between a sealing position and a release position; at the sealing position, the piston covers the corresponding bypass inlet section to prevent the bypass inlet section from being communicated with the corresponding bypass discharge channel; and at the release position, the piston is far away from the bypass inlet section to allow the bypass inlet section to be communicated with the bypass discharge passage.