Low-GWP Refrigerant Blend Composition to Replace R404A

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current refrigerants like R404A have high global warming potential (GWP), necessitating the development of low-GWP alternatives for use in refrigerating machines.

Innovation Solution

A composition comprising a refrigerant blend of trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 1,3,3,3-tetrafluoropropene (R1234ze), which offers a low GWP, suitable for use as a working fluid in refrigerating machines, and can serve as an alternative to R404A.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If R404A refrigerant is used, then refrigerating capacity is maintained, but global warming potential increases

Engineering Contradiction:

Improveglobal warming potentialVSAvoidrefrigerating capacity

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters of the refrigerant by using HFO-1132(E) with 5-40 mass%, HFO-1123 with 30-60 mass%, and R1234ze with 10-40 mass%, creating a new refrigerant mixture that achieves low GWP (≤4) while maintaining adequate refrigerating capacity through optimized component ratios

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite refrigerant mixture by combining three different chemical compounds (HFO-1132(E), HFO-1123, and R1234ze) in specific proportions, where each component contributes different properties that collectively achieve both low environmental impact and functional performance

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If flammability is reduced, then safety improves, but refrigerating capacity may decrease

Engineering Contradiction:

Improveburning velocityVSAvoidrefrigerating capacity

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent optimizes the concentration parameters of each refrigerant component, specifically setting HFO-1132(E) at 5-40 mass%, HFO-1123 at 30-60 mass%, and R1234ze at 10-40 mass%, to achieve burning velocity ≤3 cm/s while maintaining refrigerating capacity ≥80% of R404A

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12241014B2Composition containing refrigerant, use of same, refrigerator comprising same, and method for operating said refrigerator

Publication Date: 2025.03.04 DAIKIN INDUSTRIES LTD

AI summary

Provided is a novel, low-GWP mixed refrigerant. A composition contains a refrigerant that contains trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 1,3,3,3-tetrafluoropropene (R1234ze).