Compressor Pipe Insulation to Reduce Noise and Refrigerant Leakage

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Solution Overview

Problem

Existing air-conditioning compressor systems face challenges in effectively insulating electrical conductive components, leading to noise propagation and potential refrigerant leakage.

Innovation Solution

The compressor system incorporates electrically conductive casings and pipes, which are insulated using glass insulators in connectors, preventing noise transmission and refrigerant leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If electrically conductive pipes are fixed directly to the compressor casing, then the structure is simple, but noise propagates through the conductive components

Engineering Contradiction:

Improvestructure simplicityVSAvoidnoise propagation

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an insulating member as an intermediary component between the electrically conductive pipe and the compressor casing. This insulating member acts as a mediator that blocks the noise transmission path while maintaining the electrical connection functionality, thereby resolving the contradiction between structural simplicity and noise prevention.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If electrically conductive components are used without insulation, then the device complexity is reduced, but refrigerant leakage risk increases

Engineering Contradiction:

Improveinsulation structureVSAvoidrefrigerant leakage prevention

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The insulating member serves as a protective intermediary that prevents direct contact between conductive components and the compressor casing, thereby eliminating the refrigerant leakage risk associated with electrical discharge while maintaining system reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If insulating material is added between conductive components, then noise propagation is reduced, but the device complexity increases

Engineering Contradiction:

Improvenoise propagationVSAvoidinsulation structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies the insulating member only at specific locations where noise transmission occurs (at the connection points between conductive pipes and the compressor casing), rather than insulating the entire system. This localized approach reduces noise propagation while minimizing the increase in device complexity.

Inventive Principle:

Principle #3Local quality

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 effectively reduces noise propagation by insulating the conductive components close to the noise source and prevents refrigerant leakage, enhancing the overall performance and reliability of the compressor system.

Implementation Method 1

The at least one first pipe is fixed to the first casing with a first insulator interposed therebetween

Methodology Applied

Scientific EffectElectrical insulation: Dielectric

Data Source

PatentUS12338921B2Compressor and compressor unit

Publication Date: 2025.06.24 DAIKIN INDUSTRIES LTD

AI summary

A compressor is configured to compress a fluid. The compressor includes a first casing and at least one first pipe. The first casing is electrically conductive. The at least one first pipe is electrically conductive. The at least one first pipe is fixed to the first casing with a first insulator interposed therebetween.