空调器设计毕业设计样本

摘要

R22（CHF2Cl，二氟一氯甲烷）是当前应用十分普遍一种制冷剂，其ODP

为0.034，GWP为1700，由于它具有氯原子，对臭氧层有破坏作用，即将被禁用。从对环境长期影响来看，自然工质比合成工质具备不可比拟优势，例如R1270（俗称丙烯）。

丙烯长处是易于获得，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，对人体毒性也近于零毒性，饱和蒸汽压接近R22。丙烯单位容积制冷量和COP与R22接近，压缩比和排气温度也低于R22，这有助于提高压缩机运营寿命。

随着科学不断地发展，新型制冷剂将逐渐取代R22等对环境有破坏制冷剂。本文内容是设计出以R1270为工质分体式家用空调器，制冷量为3500W。一方面选以R22作工质压缩机型号，我选取型号是SL211CV,然后进行热力计算，算得制冷量为3747W，冷凝热负荷为4707W。冷凝器迎风面积为0.3957m2，蒸发器迎风面积为0.4997m2。节流装置选用直径2mm，长1.46m毛细管，最后用SolidWorks 绘制室外机三维图。

核心词：R22 ，R1270，代替工质，空调，设计

ABSTRACT

R22 (CHF2C)is a very common application of 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 known 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 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 damage 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 of capillary 1.46m，and finally with SolidWorks of three-dimensional graph drawing outdoor unit.

Key words：R22 ，R1270，substitute，air conditioning，project

惯用符号表

A 面积，m2L 长度，m

d 直径，含湿量，m，g/kg r 热阻，半径，气化潜热，℃

/W，m，J/kg

α换热系数，W/(m2·K) T 温度，℃

ρ密度，kg/m3u 流速，m/s

μ动力粘度，kg/(m·s) C

比热容，kJ/(kg·℃）

p

λ导热系数，W/(m2·℃) Q 热量，J

υ运动粘度，m2/s V 风量，m3/s

η效率q 单位制冷量，kJ/kg

β板片螺旋角,肋化系数Re 雷洛数

δ厚度，mm Nu 努塞尔数

σ表面张力，N/m v 风速，m/s

ε压缩比h 焓值，kJ/kg

V 比容，m3/kg t 温度，℃

P 压力，Pa G 质量流量，kg/s

i 比焓值，kJ/kg w 迎面风速，m/s

ξ析湿系数ψ阻力增强系数

d

当量直径，m

eq