Refrigerant-containing composition, use of same, refrigerator comprising same, and method for operating refrigerator

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Solution Overview

Problem

Existing refrigerants, such as R410A and R404A, have high global warming potentials (GWP) and undergo disproportionation reactions at high pressures and temperatures, limiting their effectiveness and safety in refrigeration systems.

Innovation Solution

A refrigerant composition comprising trans-1,2-difluoroethylene (HFO-1132) and 1,1-difluoroethane (R152a) in specific mass percentages, with optional inclusion of difluoromethane (R32), designed to maintain a low GWP and prevent disproportionation reactions at 5 MPa and 150°C, enhancing refrigerating capacity and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If existing refrigerants (R410A, R404A) are used, then refrigerating capacity is maintained, but global warming potential increases and disproportionation reactions occur at high pressures and temperatures

Engineering Contradiction:

Improveglobal warming potentialVSAvoidstability at high pressure and temperature

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters by using HFO-1132(E) with specific optical purity (enantiomeric excess of 90% or more) and controlling the ratio of HFO-1132(E) to R152a, thereby achieving both low GWP and high stability at operating conditions of 5 MPa and 150°C

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite refrigerant system by combining HFO-1132(E) and R152a in specific proportions, where the chiral pure HFO-1132(E) component provides thermal performance while suppressing disproportionation reactions, achieving synergistic effects that resolve the contradiction between environmental friendliness and operational reliability

Inventive Principle:

Principle #40Composite materials

2Reliability

If chiral pure HFO-1132 (E) is used with R152a in specific ratios, then low GWP and high stability are achieved, but refrigerating capacity may be reduced

Engineering Contradiction:

Improvestability at high pressure and temperatureVSAvoidrefrigerating capacity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent optimizes the concentration parameters by specifying HFO-1132(E) content at 22.6-57 mass% and R152a at 43-77.4 mass%, finding the optimal balance point where refrigerating capacity is maintained at 55% or more of R410A while achieving high stability and low GWP

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250262911A1Refrigerant-containing composition, use of same, refrigerator comprising same, and method for operating refrigerator

Publication Date: 2025.08.21 DAIKIN INDUSTRIES LTD

AI summary

An object of this invention is to provide a novel low-GWP mixed refrigerant. For solving this problem, the invention provides a composition comprising a refrigerant, wherein the refrigerant comprises trans-1,2-difluoroethylene (HF0-1132(E)) and 1,1-difluoroethane (R152a) respectively in amounts of 22.6 to 57 mass % and 77.4 to 43 mass % based on a total amount thereof.