The working principle of the high-pressure fan: When the impeller rotates, due to the centrifugal force, the wind direction causes the gas to move forward and outward, thus forming a series of spiral motions. The air between the impeller blades rotates in a spiral shape and squeezes the gas outside the pump body into the side groove (inhaled by the suction port). When it enters the side channel, the gas is compressed and then returned to the impeller blade again. Speed ​​up the rotation. As air passes through the impeller and side channels along a spiral track, each impeller blade increases the degree of compression and acceleration, and as the rotation progresses, the kinetic energy of the gas increases, causing the gas pressure passing along the side channels to further increase. When the air reaches the junction of the side channel and the discharge flange (the side channel narrows at the outlet), the gas is forced out of the blade and discharged through the outlet muffler.