Scroll Compressor Injection Hole Layout for Longer Refrigerant Injection

Solution Overview

Problem

The existing scroll compressor's gas injection method is limited by short injection hole opening time and small amount of refrigerant injected, leading to reduced efficiency in refrigerant injection and subsequent cooling and heating performance.

Innovation Solution

The scroll compressor is designed with multiple injection holes (first, second, third, and fourth) that open and close in a specific sequence, allowing extended injection time and refrigerant distribution across low and high-pressure compression chambers through a single injection passage, ensuring continuous refrigerant injection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single injection hole is used in the scroll compressor, then the device complexity is reduced, but the injection time is short and the amount of refrigerant injected is limited

Engineering Contradiction:

Improveinjection system complexityVSAvoidinjection hole opening time

Core Design Contradiction:

Device complexityVSDuration of action of moving object

Solution Approach 1:

The single injection hole is segmented into multiple injection holes (first, second, third, and fourth injection holes) arranged at different angular positions around the orbiting scroll. This segmentation allows each hole to be opened at different times during the rotation cycle, thereby extending the total injection time without increasing the complexity of the injection passage structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The multiple injection holes are positioned to open periodically as the orbiting scroll rotates, with each hole opening at a specific angular position. This periodic action ensures continuous refrigerant injection throughout the rotation cycle, maximizing the injection duration while maintaining a simple injection passage design.

Inventive Principle:

Principle #19Periodic action

2Device complexity

If a single injection hole is used in the scroll compressor, then the device complexity is reduced, but the amount of refrigerant injected is limited

Engineering Contradiction:

Improveinjection system complexityVSAvoidamount of refrigerant injected

Core Design Contradiction:

Device complexityVSQuantity of substance

Solution Approach 1:

The single injection hole is segmented into multiple injection holes (first, second, third, and fourth injection holes) arranged at different angular positions around the orbiting scroll. This segmentation allows each hole to be opened at different times during the rotation cycle, thereby extending the total injection time without increasing the complexity of the injection passage structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The multiple injection holes are positioned to open periodically as the orbiting scroll rotates, with each hole opening at a specific angular position. This periodic action ensures continuous refrigerant injection throughout the rotation cycle, maximizing the injection duration while maintaining a simple injection passage design.

Inventive Principle:

Principle #19Periodic action

3Productivity

If multiple injection holes with extended opening time are implemented, then the refrigerant injection efficiency is improved, but the device complexity increases

Engineering Contradiction:

Improverefrigerant injection efficiencyVSAvoidinjection system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

Multiple injection holes are merged into a single injection passage structure, allowing all holes to be fed by one common passage. This merging approach extends the injection time and improves refrigerant injection efficiency while avoiding the complexity of multiple separate injection passages and their associated control mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single injection passage serves multiple functions by supplying refrigerant to multiple injection holes at different angular positions. This multi-functionality allows the system to achieve extended injection time and improved efficiency without proportionally increasing the complexity of the injection system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 enhances cooling and heating efficiency by increasing refrigerant injection time and productivity, reducing production costs, and allowing refrigerant injection at different locations within the compressor, thereby improving overall performance.

Implementation Method 1

A gas injection method is to inject into compression chambers gas-phase refrigerant that has a median pressure between the pressure of a refrigerant drawn in a scroll compressor and the pressure of a refrigerant discharged from the scroll compressor

Methodology Applied

Scientific EffectGas injection:

Data Source

PatentEP2871365B1Scroll compressor and air conditioner including the same

Publication Date: 2016.09.14 LG ELECTRONICS INC

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AI summary

Provided are a scroll compressor and an air conditioner including the same. The scroll compressor includes a casing, a fixed scroll, an orbiting scroll, and an injection passage. The fixed scroll has a first injection hole and a second injection hole formed on the spiral flow passage, and a third injection hole and a fourth injection hole formed on the spiral flow passage inwardly rotated by about 360 degrees from the first injection hole and the second injection hole along the spiral flow passage. The first injection hole and the third injection hole are formed on an outer lane of the spiral flow passage; and the second injection hole and the fourth injection hole are formed on an inner lane of the spiral flow passage.