The working principle of a blower is based on the kinetic energy transfer theory in fluid mechanics. When the impeller rotates at high speed driven by a motor, the blades exchange momentum with the gas molecules. Under the action of centrifugal force, the gas is thrown out along the outer edge of the impeller, forming a high-pressure airflow.
This energy conversion process follows Bernoulli's equation, which states that the sum of kinetic energy and static pressure energy is conserved. Compared with ordinary fans, blowers effectively convert the kinetic energy of the gas into pressure energy through a specially designed volute structure. The typical pressure range can reach 0.1-1.5 kgf/cm², which is key to its ability to deliver air over long distances.
Modern blowers utilize three-dimensional flow theory to optimize impeller design, and through CFD (Computational Fluid Dynamics) simulation, the efficiency is improved to over 85%. Taking a certain brand of centrifugal blower as an example, it uses a backward-curved aluminum alloy impeller, which can generate a wind pressure of 10 kPa at a speed of 2900 rpm, with noise controlled below 75 decibels. This precise design allows the blower to far surpass traditional ventilation equipment in terms of energy efficiency.
