负压吸送是气力输送方式的一种。气力输送上料机采用的是负压将粉体或颗粒状的产品原料吸附过来，相对正压气力输送技术而言，负压可以有效减少生产过程中扬起的粉尘，多运用于食品、制药以及一些化工行业。相对于螺旋提升上料机而言，在同样输送量的情况下，负压吸送式气力输送上料机可降低能耗20%-30%左右，完全符合当下高效节能的生产要求。

　　Negative pressure suction is a type of pneumatic conveying method. The pneumatic conveying feeder uses negative pressure to adsorb powdered or granular product raw materials. Compared to positive pressure pneumatic conveying technology, negative pressure can effectively reduce the dust raised during the production process, and is commonly used in the food, pharmaceutical, and some chemical industries. Compared to the spiral lift feeder, the negative pressure suction pneumatic conveying feeder can reduce energy consumption by about 20% -30% under the same conveying capacity, fully meeting the current production requirements of high efficiency and energy conservation.

　　负压吸送式气力输送设备，易清洗占地少 节约生产成本。气力输送设备结构简单，在清洗方面相对其他一些需要将机械结构全部拆开清洗而言，气力输送设备仅需要清洗软管式的输送管道以及料斗的内壁即可，这就使得在设备清洗方面节约了很大成本。

　　Negative pressure suction pneumatic conveying equipment is easy to clean, occupies less space, and saves production costs. The structure of pneumatic conveying equipment is simple, and in terms of cleaning, it only needs to clean the flexible hose type conveying pipeline and the inner wall of the hopper, which saves a lot of costs in equipment cleaning compared to other mechanical structures that need to be completely disassembled for cleaning.

　　并且，气力输送设备占地较小，这也符合食品生产企业要求设备占地小的要求，节约厂房面积。另外，不需要人工全程操作的特性也使得负压吸送式气力输送设备具有节约人工成本的优势，在人工成本上涨的当下这点受到众多生产厂商的欢迎。

　　Moreover, pneumatic conveying equipment occupies a small area, which also meets the requirements of food production enterprises for small equipment occupation and saves factory space. In addition, the characteristic of not requiring manual operation throughout the entire process also makes negative pressure suction pneumatic conveying equipment have the advantage of saving labor costs, which is welcomed by many manufacturers in the current era of rising labor costs.

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