Composition including refrigerant, use therefor, refrigerator comprising same, and method for operating said refrigerator
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Solution Overview
Problem
Current refrigerants like R404A and R134a have high global warming potential (GWP), necessitating the development of low-GWP alternatives that can maintain or exceed their refrigerating capacity and safety standards.
Innovation Solution
A mixed refrigerant composition comprising trans-1,2-difluoroethylene (HFO-1132(E)) and 1,3,3,3-tetrafluoropropene (R1234ze) in specific ratios, which offers a low GWP, high refrigerating capacity, and improved safety characteristics, including lower flammability and efficient operation across various temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If R404A is used as a refrigerant, then refrigerating capacity is maintained, but global warming potential becomes too high
Solution Approach 1:
The patent changes the chemical composition parameters of the refrigerant by using HFO-1132(E) with 35.3 to 72.0 mass% and R1234ze with 64.7 to 28.0 mass%, creating a new refrigerant mixture that achieves GWP of 4 or less while maintaining refrigerating capacity of 70% or more relative to R404A
Solution Approach 2:
The patent creates a composite refrigerant mixture by combining HFO-1132(E) and R1234ze in specific ratios, where the synergistic effect of these two components achieves both low GWP and adequate refrigerating capacity that neither component could achieve alone
2Object-affected harmful factors
If refrigerant composition is changed to reduce GWP, then environmental safety is improved, but refrigerating capacity may decrease
Solution Approach 1:
The patent optimizes the concentration parameters of HFO-1132(E) and R1234ze within specific ranges (35.3 to 72.0 mass% and 64.7 to 28.0 mass% respectively) to achieve the optimal balance between environmental safety and refrigerating capacity, ensuring GWP of 4 or less while maintaining refrigerating capacity of 70% or more
3Object-affected harmful factors
If new refrigerant mixture is developed, then GWP is reduced, but flammability safety may be compromised
Solution Approach 1:
The patent carefully controls the compositional parameters of HFO-1132(E) and R1234ze to achieve GWP of 4 or less while maintaining burning velocity of 10 cm/s or less, optimizing both environmental and safety parameters simultaneously through precise composition control
Data Source
AI summary
An object is to provide a novel low-GWP mixed refrigerant. A solution to the problem is to provide a composition containing a refrigerant that contains trans-1,2-difluoroethylene (HFO-1132(E)) and 1,3,3,3-tetrafluoropropene (R1234ze).