摘 要:本论文主要介绍了自动售货机制冷系统的制冷原理以及它的结构设计.通过对制冷系统的研究与分析，基于使系统能够安全可靠地制冷各类物品，结构尽可能简单的要求提出了整体的设计方案.通过蒸发器的创新，将传统盘管式蒸发器设计成铝铝吹胀式，通过配以不同的置物板从而达到制冷不同物品的目的，改良了传统自动售货机制冷系统只能制冷单一物品的不足.制冷系统主要由压缩机、冷凝器、节流阀、蒸发器组成.自动售货机制冷系统结构设计运用了机械设计、创新思维等多方面的知识，是对所学知识的一次综合考验.在设计过程中还综合各方面因素对设计做了多次改进，并提出一些改进措施.

　　　然后充分利用AutoCAD软件强大的参数化特征将设计图形显而易懂的呈现在我们面前.

　　　本设计主要做的工作：一、制冷系统的总体设计（运用CATIA软件）；二、制冷系统的冷凝器计算与设计；三、蒸发器的计算与设计；四、制冷剂的选择；五、压缩机选型及热力计算；六、毛细管长度的计算；七、主要零部件设计.

关键字：压缩机；冷凝器；蒸发器 ；AutoCAD

ABSTRACT:This paper introduces the refrigeration system the refrigeration principle and the structural design of the vending machines. Through the research and analysis, I made the overall design so that the system can refrigerate many kinds of items safely and reliably, and the structure can be as simple as possible. Through the evaporator innovation, I designed the traditional coil evaporator into aluminum-aluminum blow-style with different parcel shelves so as to refrigerate different items. I improved the refrigeration system of the conventional vending machines that they can only refrigerate single items inadequate. The refrigeration system includes the compressor, condenser, throttle and evaporators. In the design of the refrigeration system of Vending machines I used the mechanical design, innovative thinking and other aspects of knowledge, it is a comprehensive test of the knowledge that I learned. In the design process, I took various factors into account and I made ​​a number of improvements and make some improvements in the design.

　　　Then take advantage of the powerful AutoCAD software parametric feature to design graphical display so that we can easily understand.

　　　Main achievements:  First, design a refrigeration system (use CATIA); Second, calculate and design the refrigeration system condenser; Third, calculate and design evaporator; Fourth, the choice of refrigerant; Fifth. Compressor selection and calculate the thermodynamic; Sixth, calculate the capillary length; Seventh, design main components.

Keywords: compressor, condenser, evaporator, AutoCAD