一、加氟抽真空变频的基本概念 加氟抽真空变频（Vacuum Fluoride Frequency，VFF）是一种新型的变频技术，属于变频调速技术的一种。它将真空抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽抽