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制冷剂R290作为一种环保制冷剂,已在小型全封闭系统中逐渐推广应用。R290作为一种可行的制冷剂用在商用冷柜上具有良好的能效,但对于丙烷的易燃性必须采取切实可行的措施。本文根据长期的设计和应用经验,在分析了R290制冷剂应用特性的基础上,给出了R290的工作压力、充注量等应用特性,给出了与之匹配的材料选择、系统节流装置的选用,在冷柜系统及结构设计方面给出了控制制冷剂泄漏量、避免泄露的制冷剂聚集、避免出现点火源、避免点火源与可燃源共同存在等安全措施。
As a kind of environmental protection refrigerant, R290 has gradually been popularized and applied in small closed system. R290 as a viable refrigerant is used in commercial refrigerators with good energy efficiency, but for propane flammability must take practical measures. Based on the long-term design and application experience, based on the analysis of the application characteristics of R290 refrigerant, the application characteristics of R290, such as working pressure and filling amount, are given. The corresponding material selection, system throttling device The selection of refrigeration system and structural design gives the control of refrigerant leakage, to avoid leakage of refrigerant accumulation, to avoid the ignition source, to avoid ignition source co-existence with flammable sources and other safety measures.