Composition for refrigerating machines
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Solution Overview
Problem
The composition for refrigerators using mixed refrigerants with HFO and HFC face challenges in achieving both favorable refrigerant dissolution properties and dissolution viscosity, leading to reduced refrigeration efficiency, increased energy consumption, and potential wear of lubricating components.
Innovation Solution
A composition for refrigerators is developed using a mixed refrigerant with 52-66% HFO and 10-48% HFC, combined with a polyvinyl ether (PVE) base oil, to balance refrigerant dissolution properties and dissolution viscosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the dissolution properties of the refrigerant relative to the refrigerator oil are increased, then the refrigeration efficiency is improved, but the dissolution viscosity decreases and lubricity is lowered
Solution Approach 1:
The patent applies parameter changes by carefully controlling the composition ratios of HFO and HFC in the mixed refrigerant, and selecting specific polyvinyl ether base oils with appropriate molecular weights and structures. By adjusting these parameters, the invention achieves an optimal balance where the refrigerant dissolves sufficiently in the oil to maintain refrigeration efficiency, while the dissolution viscosity remains high enough to preserve lubricity and prevent compressor wear.
2Reliability
If the dissolution viscosity of the composition is increased, then the lubricity is improved, but the refrigerant vaporization is inhibited
Solution Approach 1:
The invention uses parameter changes by selecting polyvinyl ether base oils with specific molecular weight ranges and structural characteristics that provide adequate viscosity for lubrication while allowing sufficient refrigerant vaporization. The controlled composition of HFO and HFC further optimizes this balance, ensuring the refrigerant can effectively vaporize in the evaporator while maintaining appropriate dissolution viscosity in the compressor.
3Object-affected harmful factors
If a mixed refrigerant with HFO and HFC is used, then the global warming potential is reduced, but the balance between dissolution properties and dissolution viscosity becomes difficult to achieve
Solution Approach 1:
The patent addresses the complexity of balancing dissolution properties and dissolution viscosity by systematically optimizing the parameters of the mixed refrigerant composition (HFO and HFC ratios) and the base oil selection (polyvinyl ether types and molecular weights). This structured parameter optimization enables the invention to achieve both low global warming potential and proper composition balance.
Solution Approach 2:
The invention applies composite materials by creating a carefully formulated mixed refrigerant composition combining HFO and HFC, and pairing it with polyvinyl ether base oils. This composite approach allows the system to leverage the low GWP benefits of HFO while using HFC and specific base oils to maintain appropriate dissolution and lubrication properties.
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
The solution provides a composition that maintains favorable refrigerant dissolution properties and dissolution viscosity, enhancing refrigeration efficiency and reducing wear on lubricating components, thus extending the life of the refrigerator.
Implementation Method 1
the dissolution properties of the refrigerant relative to the refrigerator oil are not sufficient, the effects of the refrigerant cannot be sufficiently utilized
Data Source
AI summary
The present invention relates to a composition for refrigerator including a mixed refrigerant and a refrigerator oil containing a base oil (P), wherein the mixed refrigerant includes an unsaturated fluorinated hydrocarbon compound (HFO) in an amount of more than 50% by mass and 70% by mass or less on a basis of the whole amount of the mixed refrigerant and a saturated fluorinated hydrocarbon compound (HFC); and the base oil (P) includes a polyvinyl ether (PVE). Thus, the present invention provides a composition for refrigerator using a mixed refrigerant, in which not only the refrigerant dissolution properties are favorable, but also a favorable dissolution viscosity is exhibited.