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电冰箱做为蒸发致冷的重要应用之一,学生对于靠液体蒸发吸热能将水制成冰总有些怀疑.为此我在教学中制作了此实验装置,通过演示彻底消除了学生的疑虑,并为以后分析电冰箱原理中加压液化,减压汽化吸热这一循环过程做好了感性上的铺垫.一、所需器材:0.7毫米厚的铁片(5厘米×8厘米)两块,配有蝶形螺母的长7厘米左右的螺丝两个,15厘米长的细铜丝一根(用漆包线应刮去漆层),自行车内胎一块,5～6厘米高的无色透明玻璃药瓶一个,补带胶水一瓶,打火机
Refrigerator is one of the important applications of evaporative cooling. Students are always skeptical about using liquid evaporative heat to make water from ice. For this reason, I created this experimental device in teaching and eliminated students’ doubts through demonstration. , And for the future analysis of refrigerator principle in the pressure liquefaction, vacuum vaporization endothermic this cycle is well prepared for the emotional. First, the required equipment: 0.7 mm thick iron sheet (5 cm x 8 cm) two Block, two screws with a length of about 7 cm with a wing nut, one thin copper wire with a length of 15 cm (the paint layer should be scraped off the paint layer), a bicycle inner tube, and a colorless transparent glass of 5 to 6 cm in height A medicine bottle, a bottle of glue, lighter