Analysis of Factors Affecting the Performance of Crossflow Fans
Category: BLOG
2024-04-24
The axial fan, also known as the through-flow fan, has a multi-blade, elongated cylindrical impeller with forward multi-wing blades. When the impeller rotates, the airflow enters the blade grid from the open side of the impeller, passes through the inside of the impeller, and is discharged from the other side of the blade grid into the volute, forming the working airflow.
1. The through-flow fan operates using a relatively long cylindrical impeller. The diameter of this cylindrical impeller is relatively large, which allows for a lower rotational speed while ensuring the overall air circulation volume, thereby reducing noise caused by high-speed operation.
2. The impeller of the cooling fan undergoes dynamic balancing: just like car wheels need to be dynamically balanced, the wind wheel of the air curtain also requires this work. In simple terms, it is about maintaining the balance of the wind wheel during operation, reducing noise, and extending the lifespan of the fan. Dynamic balancing is a labor-intensive task; in fact, the final result may just involve adding counterweights to certain parts of the wind wheel. However, where to add them and how much to add directly affects the lifespan of the through-flow air curtain.
3. The blades of the cooling fan are carefully calculated to intentionally create a chaotic distance between the blades, presenting an "unequal distance" situation: this is also simple, as it strives to make the rotating wind wheel produce an audio frequency with the air that is "irregular," creating a "uniform" wind sound rather than concentrating on a specific frequency band. Noise can be categorized into narrowband and broadband noise; regular narrowband noise easily attracts people's attention and can be annoying, while broadband noise is closer to natural noise conditions. Although it cannot be eliminated, it is relatively "more bearable," making it less bothersome.
4. Use high-quality materials for the blades: the impeller of the cooling fan inside the air curtain is quite long. If such a cylindrical blade is made from inferior materials, it can save a lot of costs, but it will deform after a short time, causing the entire blade to no longer be in a straight line but to sag in the middle. You can imagine how high the noise will be when such a sagging blade spins, and it will also cause the entire air curtain to vibrate!
5. Use high-quality motors: the wind wheel relies on the motor to operate. If the motor quality is poor, it cannot operate normally or starts weakly, which is unacceptable. If the motor quality is poor, you will also hear a "buzzing" sound from the motor, which is even more torturous.
RELATED INFORMATION
Understanding Industrial Cross Flow Fans: Key Features and Applications
Industrial cross flow fans are a critical component in various industrial applications, particularly in air conditioning, refrigeration, and ventilation systems. Unlike traditional axial fans, cross flow fans operate by drawing air in parallel to the axis of the fan and expelling it at a right angle. This unique design allows for a more uniform air distribution, making them particularly suitable f
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