Airflow closed type kitchen auxiliary smoke exhaust system with U-shaped edge part

The invention discloses an airflow closed type kitchen auxiliary smoke exhaust system with a U-shaped edge part. The airflow closed type kitchen auxiliary smoke exhaust system comprises a first static pressure box and a second static pressure box which are symmetrically arranged in parallel and communicated with each other through a ventilating pipeline, wherein the ventilating pipeline is connected with a fan; the first static pressure box and the second static pressure box are U-shaped static pressure boxes; a first air feed channel and a third air feed channel are formed below the U-shaped structure of the first static pressure box; and a second air feed channel and a fourth air feed channel are formed above the U-shaped structure of the second static pressure box. According to the unique design of the airflow closed type kitchen auxiliary smoke exhaust system with the U-shaped edge part, six groups of airflows which collides with one another are produced; due to the collision among the airflows, an air pi