Refrigerant-containing composition, use thereof, refrigerator having same, and method for operating said refrigerator
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Solution Overview
Problem
Current refrigerants like R410A have high global warming potential (GWP), necessitating the development of low-GWP alternatives that maintain refrigerating capacity and operational efficiency.
Innovation Solution
A refrigerant composition comprising 1,1-difluoroethylene (HFO-1132a), difluoromethane (R32), and 1,3,3,3-tetrafluoropropene (R1234ze) is proposed, with specific mass percentage ranges to achieve a low GWP while maintaining a refrigerating capacity ratio of 70% or more relative to R410A.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If R410A is used as refrigerant, then refrigerating capacity is maintained, but global warming potential increases
Solution Approach 1:
The patent changes the chemical composition parameters of the refrigerant by using HFO-1132a (1,1-difluoroethylene) as a key component instead of conventional refrigerants like R410A. This parameter change in molecular structure fundamentally reduces the GWP while maintaining refrigerating capacity through optimized composition ratios of HFO-1132a, R32, and R1234ze
Solution Approach 2:
The patent creates a composite refrigerant formulation by combining multiple components (HFO-1132a, R32, and R1234ze) in specific ratios. This composite approach allows the mixture to achieve low GWP properties while compensating for individual component limitations to maintain overall refrigerating capacity
2Object-affected harmful factors
If R32 is used to reduce GWP, then global warming potential decreases, but refrigerating capacity must be optimized
Solution Approach 1:
The patent applies local quality by assigning specific functional roles to different refrigerant components: HFO-1132a provides low GWP and base refrigerating capacity, R32 enhances refrigerating capacity, and R1234ze adjusts thermodynamic properties. Each component is positioned in the composition with optimized local concentration to achieve overall system performance
Solution Approach 2:
The patent optimizes the concentration parameters of each component within specific ranges (HFO-1132a: 5-80 mass%, R32: 20-70 mass%, R1234ze: 1-20 mass%) to balance GWP reduction with refrigerating capacity maintenance, achieving a refrigerating capacity ratio of 70% or more relative to R410A
3Object-affected harmful factors
If refrigerant composition is optimized for low GWP, then environmental impact reduces, but condensation temperature glide must be controlled
Solution Approach 1:
The patent carefully adjusts the composition parameters to control the phase change behavior of the refrigerant mixture. By optimizing the ratios of HFO-1132a, R32, and R1234ze, the condensation temperature glide is limited to 5°C or less, preventing excessive temperature variation during phase change while maintaining low GWP
Data Source
AI summary
An object is to provide a novel low-GWP mixed refrigerant. As a solution to achieve the object, a composition containing a refrigerant that contains 1,1-difluoroethylene (HFO-1132a), difluoromethane (R32), and 1,3,3,3-tetrafluoropropene (R1234ze) is provided.