Rotary Compressor Multi-Port Suction Design to Reduce Flow Congestion

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Solution Overview

Problem

Rotary compressors face issues with refrigerant flow congestion at the inlet, leading to reduced compression efficiency.

Innovation Solution

The design incorporates a main suction port with sub-suction ports and flow path grooves on flanges that connect to the suction chamber, enhancing the flow path and improving refrigerant inflow by distributing it uniformly and increasing the rotational movement distance of the rolling piston, thereby improving compression efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a single main suction port is used in conventional rotary compressors, then the structure is simple, but refrigerant flow congestion occurs at the inlet reducing compression efficiency

Engineering Contradiction:

Improvecompression efficiencyVSAvoidsuction port structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The single main suction port is segmented into multiple sub-suction ports (first sub-suction port and second sub-suction port) that extend in different directions. Each sub-suction port connects to the suction chamber through separate flow path grooves, distributing refrigerant flow across multiple entry points to prevent congestion and improve compression efficiency.

Inventive Principle:

Principle #1Segmentation

2Productivity

If the suction port is enlarged to increase refrigerant flow, then mass flow improves, but flow congestion and uneven distribution occur

Engineering Contradiction:

Improvemass flow of refrigerantVSAvoidflow distribution uniformity

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

Different sub-suction ports are positioned and oriented to serve different local regions of the suction chamber. The first sub-suction port extends in a first direction while the second sub-suction port extends in a second direction, creating localized flow paths that ensure uniform refrigerant distribution throughout the chamber and prevent congestion in any single area.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The suction port structure transitions from a single-dimensional entry to a multi-dimensional configuration. Sub-suction ports extend in different spatial directions (first direction and second direction) and are positioned at different locations, creating a three-dimensional flow distribution network that improves both mass flow and uniformity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Productivity

If the rolling piston rotational movement distance is increased to improve compression, then compression efficiency improves, but the device dimensions increase

Engineering Contradiction:

Improvecompression efficiencyVSAvoidrotational movement distance

Core Design Contradiction:

ProductivityVSLength of moving object

Solution Approach 1:

The flow path grooves are pre-configured in the flange to guide refrigerant flow in advance toward optimal positions in the suction chamber. This preliminary flow direction arrangement ensures that refrigerant enters the compression zone at the most effective positions, maximizing the utilization of the rolling piston's rotational movement and improving compression efficiency without requiring increased movement distance.

Inventive Principle:

Principle #10Preliminary action

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 configuration enhances the mass flow of refrigerant and increases the compression efficiency of the rotary compressor by ensuring uniform distribution and reducing stagnation, leading to improved performance under the same power consumption.

Implementation Method 1

at least one among the first flange and the second flange may include a flow path groove connecting the sub suction port and the suction chamber

Methodology Applied

Scientific EffectFluid flow distribution:

Implementation Method 2

a rolling piston configured to rotate eccentrically in the internal space

Methodology Applied

Scientific EffectEccentric rotation compression: Eccentric

Implementation Method 3

a vane configured to contact the rolling piston and divide the internal space into a suction chamber and a compression chamber

Methodology Applied

Scientific EffectMechanical partitioning:

Data Source

PatentUS12000401B2Rotary compressor with first and second main suction ports

Publication Date: 2024.06.04 SAMSUNG ELECTRONICS CO LTD

AI summary

This rotary compressor comprises: a casing forming the outer shape; a rolling piston configured to rotate eccentrically in an internal space; a vane configured to contact the rolling piston and divide the internal space into a suction chamber and a compression chamber; and a main suction port connecting the suction chamber to an outside of the cylinder. The rotary compressor also comprises: a cylinder disposed inside the casing; a first flange disposed above the cylinder; and a second flange disposed below the cylinder. The main suction port comprises a sub suction port extending in a direction in which at least one among the first flange and the second flange is disposed, and at least one among the first flange and the second flange has a flow path groove connecting the sub suction port and the suction chamber.