清洗原理是不断加热溶剂室中的清洗溶剂，使其不断汽化。溶剂蒸汽充满整个清洗室空间，部分蒸汽在顶部冷凝水箱表面冷 凝成溶剂，不断淋洗要清洗的器皿外壁，而器皿内部的蒸汽又不断在内壁冷凝，冷凝溶剂不断溶解和冲洗器皿壁里，沥青油污全 部洗净沉入溶剂箱内。

The capillary tube (asphalt viscosity tube) cleaning machine can be used to clean the utensils contaminated with various oil stains in the heavy petroleum products and various asphalt test processes, and can also be used for the cleaning of small and medium-sized oil-stained parts in the machine repair industry. The instrument replaces manual cleaning, which can greatly reduce labor intensity; reduce pollution to the environment; And it can recycle the cleaning solvent to save cleaning agents. The instrument is simple in structure, easy to operate, safe and reliable.