1、I 摘要摘要 R22（CHF2Cl，二氟一氯甲烷）是目前应用十分普遍的一种制冷剂，其 ODP 为0.034，GWP为1700，由于它含有氯原子，对臭氧层有破坏作用，即将被禁用。 从对环境的长期影响来看, 自然工质比合成工质具有不可比拟的优势，比如 R1270（俗称丙烯）。 丙烯优点是易于获得，价格低廉，凝固点低，对金属不腐蚀。丙烯可燃, 消 耗臭氧潜能值为零, 环保性能好，对人体的毒性也近于零毒性，饱和蒸汽压接近 R22。丙烯的单位容积制冷量和COP与R22接近, 压缩比和排气温度也低于R22，这 有利于提高压缩机的运行寿命。 随着科学不断地发展，新型制冷剂将逐步取代 R22 等对环境有破坏的
2、制冷 剂。 本文的内容是设计出以 R1270 为工质的分体式家用空调器， 制冷量为 3500W。 首先选以 R22 作工质的压缩机型号，我选择的的型号是 SL211CV,然后进行热力 计算， 算得制冷量为 3747W， 冷凝热负荷为 4707W。 冷凝器的迎风面积为 0.3957m 2， 蒸发器的迎风面积为 0.4997m 2。节流装置选用直径 2mm，长 1.46m 的毛细管，最 后用 SolidWorks 绘制室外机三维图。 关键词关键词：R22 ，R1270，替代工质，空调，设计 II ABSTRACT R22 (CHF2C)is a very common application of
3、 refrigerant, the ODP is 0.034, GWP is 1700, because it contains chlorine atoms, has damaging effects on the ozone layer, is about to be disabled. From long-term impact on the environment, the synthesis of natural refrigerant than refrigerant has unparalleled advantages, such as R1270 (commonly know
4、n as propylene). Propylene advantage of easy access, low cost, low freezing point, non-corrosive metal. Propylene flammable, zero ozonedepleting potential, good environmental performance, the toxicity of the human body may be close to zero toxicity, saturation vapor pressure close to R22. Propylene
5、refregeration unit volume and the R22 and COP close to the compression ratio and exhaust temperature is also lower than the R22, which is conducive to enhance the operational life of the compressor. With the continuous development of science, the new refrigerant R22 will be gradually replaced by dam
6、age to the environment, such as refrigerants. This article is designed for the working fluid in the R1270 home split air conditioners, refrigeration capacity of 3500W. First elected to conduct a qualitative R22 compressor models, I chose to model is the SL211CV, and then proceed to the heat, the cooling capacity can be said for the 3747W, condensing heat load of 4707W. Condenser area of the wind 0.3957m2, evaporator area of the wind 0.4997m2. Selection of cutting device diameter 2mm, length o
