Scroll Compressor Restriction Component With Dynamic Pressure Groove

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Solution Overview

Problem

Existing scroll compressors face issues with insufficient dynamic pressure generation, leading to refrigerant leakage through the axial gap between scrolls, which compromises compression efficiency and increases noise.

Innovation Solution

A restriction component with a dynamic pressure generation groove is integrated into the movable scroll, allowing for dynamic pressure generation through relative movement with the thrust receiving mechanism, enhancing slidability and reducing refrigerant leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If spiral groove mechanisms are formed on the thrust bearing to generate dynamic pressure, then slidability is improved, but sufficient dynamic pressure cannot be obtained

Engineering Contradiction:

ImproveslidabilityVSAvoiddynamic pressure generation

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The invention transitions from conventional spiral groove mechanisms on the thrust bearing to a dynamic pressure generation groove on the movable scroll itself, changing the spatial location and dimension of pressure generation. This allows direct formation of a fluid film between the movable scroll and fixed scroll, effectively resolving the insufficient dynamic pressure issue while maintaining improved slidability

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If the movable scroll slides relative to the fixed scroll while eccentrically rotating, then compression efficiency is improved, but refrigerant leakage occurs through the axial gap

Engineering Contradiction:

Improvecompression efficiencyVSAvoidrefrigerant leakage

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The invention utilizes fluid pressure (refrigerant) to create a dynamic pressure fluid film through the groove structure, separating the movable scroll from the fixed scroll. This hydraulic/pneumatic separation prevents refrigerant leakage through the axial gap while maintaining the eccentric rotation sliding mechanism that ensures high compression efficiency

Inventive Principle:

Principle #29Pneumatics and hydraulics

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 dynamic pressure generation groove improves slidability and reduces refrigerant leakage, maintaining high compression efficiency and low noise operation.

Implementation Method 1

a dynamic pressure generation groove configured for generating a dynamic pressure at a location facing the movable scroll

Methodology Applied

Scientific EffectDynamic pressure: Pressure Increase

Implementation Method 2

slidability can be increased by forming a fluid film between sliding surfaces of the movable scroll and the ring-shaped plate

Methodology Applied

Scientific EffectFluid film: Lubrication

Data Source

PatentEP4621234A1Regulating component

Publication Date: 2025.09.24 EAGLE INDS

Figure 1
Figure 2(a)~2(c)
Figure 3(a)~3(b)

AI summary

There is provided a restriction component with good slidability. A restriction component 9 is provided on a back surface of a movable scroll 42 that slides relative to a fixed scroll 41 while rotating eccentrically, and restricts a rotation of the movable scroll 42 while allowing the eccentric rotation of the movable scroll 42, and the restriction component 9 is provided with a dynamic pressure generation groove 94 configured for generating a dynamic pressure on the back surface of the movable scroll 42.