這篇文章主要記錄由 2014 年開始到 2018 年的便攜式冷氣機（空調）開發計劃的所有版本及失敗原因。由於此計劃已經完成，現在在此作開源處理。 授權：姓名標示-非商業性-禁止改作 3.0 香港 (CC BY-NC-ND 3.0 HK) Short for PA#, The version number is represented by #. Aim This project aims to design and create the world's first Thermoelectric Plate based portable air cooling devices with a target of handheld and at least 1 hour running time. Budget Limit The budget has been limited to less than 1000HKD per prototype. And the manufacturing price of raw material (excluding shipping) should be lower than 100HKD. The design of PA1 to PA5 did not have any prototype as there are still design problems inside the sketch that made the sketch not possible to manufacture. Reference design sketches are included as reference. PA01 PA02 PA03 PA04 PA04 rev2 PA05 PA06The first success prototype of the Portable Air Conditioner Project. System wiringPA07 The PA07 was similar to PA06 but with more solid casing with cardboard instead of paper cards. Cooling UnitPA08The PA08 was the first prototype for self contained Portable Air Conditioner with standard forward Peltier Design. Internal StructurePA09The portable air conditioner version 9 was the first version that…