What is the design principle of diagonal duct fans?

The diagonal duct fan is a highly efficient fan whose design is based on the principles of fluid mechanics and aerodynamics. The design principles of diagonal duct fans will be introduced in detail below:

Oblique flow impeller design: The diagonal duct fan adopts an oblique flow impeller design. The blades of the oblique flow impeller are arranged at an oblique angle, causing oblique momentum transfer when the air flows through the impeller. This design allows the fan to produce higher static pressure and flow, improving air delivery capabilities.
Airflow Guidance: The air duct design of the diagonal duct fan is carefully optimized to effectively guide the airflow through the impeller. The shape and size of the air duct play a key role in the speed and direction of the airflow, ensuring that the airflow passes through the impeller smoothly and obtains maximum kinetic energy transfer.
Twisted blade design: Impeller blades usually have a twisted design, where the blades taper toward the direction of the wind flow. This design allows the blades to generate greater power when rotating at high speed, and reduces the friction loss between the airflow and the blades, improving the efficiency of the fan.
Static Pressure and Momentum Transfer: Diagonal duct fans drive airflow through static pressure and momentum transfer. Static pressure is the pressure difference generated by the rotation of the impeller, which can push the air flow to a relatively higher pressure area; while momentum transfer uses the momentum of the air flow to accelerate the air flow.
Blade to Impeller Match: A good match between the blades and impeller of a diagonal duct fan is required to ensure optimal airflow dynamics. The shape, number and angle of the blades all have an important impact on the performance of the fan and require precise calculation and optimization.
Energy Conversion: Diagonal duct fans achieve air transport by converting mechanical energy into air kinetic energy. When the motor drives the impeller to rotate, the impeller converts mechanical energy into air kinetic energy, thereby promoting air flow.
Optimized air flow path: The design of the fan also includes an optimized air flow path to ensure smooth airflow throughout the system. By properly designing the air ducts and heat dissipation structures around the fan, resistance and energy loss can be minimized.
Consider efficiency and noise: When designing a diagonal duct fan, a balance between efficiency and noise needs to be considered. On the one hand, the efficiency of fans needs to be improved to reduce energy consumption and operating costs; on the other hand, the noise level of fans also needs to be controlled to ensure the comfort of the indoor environment.