use up and down two tanks, oil removal to ensure that no back oil, so that oil and water content is lower. Deep frying, deoiling, dewatering, oil filter integrated design, complete continuity under vacuum, products with low oil content, products in the vacuum state, food processing in this relatively hypoxic conditions, can reduce or even avoid oxidation (such as fat rancidity and enzymatic browning and other oxidation damage etc.) the. In the negative pressure state, oil is used as a heat tran