Compressor and air conditioner having same

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Solution Overview

Problem

The efficiency of discharging accumulated oil from the intermediate cavity in two-stage enthalpy adding compressors is low, leading to instability in motor torque output, increased current, and potential compressor shutdown due to oil squeezing and vane separation issues.

Innovation Solution

A compressor design with a bottom-located intermediate passage and gas supplement passage that uses refrigerant in gas form to efficiently convey accumulated oil from the intermediate cavity to the second compression part, enhancing the discharge efficiency by atomizing and reducing resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the intermediate passage outlet is arranged on the top of the intermediate cavity, then the structure is simplified, but the efficiency of discharging accumulated oil from the intermediate cavity is low

Engineering Contradiction:

Improvestructural simplicityVSAvoidoil discharge efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent inverts the conventional arrangement by placing the intermediate passage outlet at the bottom of the intermediate cavity instead of at the top. This inversion allows the refrigerant to flow downward and effectively carry accumulated oil from the bottom of the cavity, significantly improving oil discharge efficiency while maintaining structural simplicity.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of manufacture

If the intermediate passage outlet is arranged on the top of the intermediate cavity, then the structure is simplified, but the speed of discharging accumulated oil is low

Engineering Contradiction:

Improvestructural simplicityVSAvoidoil discharge speed

Core Design Contradiction:

Ease of manufactureVSSpeed

Solution Approach 1:

Inventive Principle:

Principle #13The other way round (Inversion)

3Device complexity

If accumulated oil cannot be discharged in time, then the intermediate cavity structure is simple, but the motor torque output becomes unstable and current increases

Engineering Contradiction:

Improveintermediate cavity structureVSAvoidmotor torque stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent inverts the conventional arrangement by placing the intermediate passage outlet at the bottom of the intermediate cavity instead of at the top. This inversion allows the refrigerant to flow downward and effectively carry accumulated oil from the bottom of the cavity, preventing oil accumulation that would otherwise cause motor torque instability and excessive current while maintaining simple cavity structure.

Inventive Principle:

Principle #13The other way round (Inversion)

4Device complexity

If accumulated oil cannot be discharged in time, then the intermediate cavity structure is simple, but the sliding vane separates from the roller causing reliability issues

Engineering Contradiction:

Improveintermediate cavity structureVSAvoidcompressor reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent inverts the conventional arrangement by placing the intermediate passage outlet at the bottom of the intermediate cavity instead of at the top. This inversion allows the refrigerant to flow downward and effectively carry accumulated oil from the bottom of the cavity, preventing oil accumulation that would otherwise cause sliding vane separation from the roller and subsequent reliability issues while maintaining simple cavity structure.

Inventive Principle:

Principle #13The other way round (Inversion)

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 design effectively discharges accumulated oil, stabilizes motor torque, prevents vane separation, and improves compressor reliability by increasing the speed and efficiency of oil conveyance.

Implementation Method 1

a gas supplement passage for conveying a supplement refrigerant in gas form

Methodology Applied

Scientific EffectGas flow conveyance: Advection

Implementation Method 2

enhancing the discharge efficiency by atomizing and reducing resistance

Methodology Applied

Scientific EffectAtomization: Aerosol

Data Source

PatentEP3719324B1Compressor and air conditioner having same

Publication Date: 2026.02.18 ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION

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AI summary

Some embodiments of the present disclosure provide a compressor and an air conditioner with the compressor. The compressor includes: a first compression part (10), a second compression part (20), an intermediate cavity (30) and an intermediate passage (40). Refrigerant discharged from the first compression part (10) enters the intermediate cavity (30). The intermediate passage (40) communicates with the intermediate cavity (30) and an inner cavity of the second compression part (20). A bottom port of the intermediate passage (40) is located at a bottom of the intermediate cavity (30), and air supplement refrigerant and/or the refrigerant discharged from the first compression part (10) are used to convey accumulated oil in the intermediate cavity (30) to the inner cavity of the second compression part (20). When only the refrigerant discharged from the first compression part (10) is used to convey the accumulated oil in the intermediate cavity (30) to the inner cavity of the second compression part (20), at least a part of the intermediate passage (40) is located outside of a housing assembly (90) of the compressor, thereby improving the efficiency of discharging the accumulated oil in the intermediate cavity (30) from the intermediate cavity (30).