The high suction fan design of household range hoods can not only quickly capture cooking fumes, but also effectively reduce noise pollution through the combination of aerodynamic optimization and noise reduction technology, achieving a balance between smoking efficiency and user experience. This design does not simply increase the power of the fan, but makes systematic improvements from structure, materials to operation logic, so that "high suction" and "low noise" are no longer contradictory.
The high speed of the fan and the optimized impeller shape are the core of fast smoking. The fan is driven by a high-power motor, which can drive the impeller to rotate at high speed and form a strong negative pressure area inside the household range hoods. The blade design of the impeller follows the principles of aerodynamics and is arc-shaped or twisted. When rotating, it can efficiently cut the air and quickly inhale the fumes. At the same time, the diameter and inclination angle of the impeller are accurately calculated to ensure that a larger air volume is generated at the same speed, so that the fumes generated during cooking are firmly sucked by the negative pressure as soon as they rise, avoiding diffusion to the kitchen space, and achieving the effect of "quick capture".
The combination of the smoke collection cavity and the fan enhances the smoking efficiency. The shape of the smoke collecting chamber is precisely matched with the air inlet of the fan, forming a smooth air channel, which minimizes the resistance of the oil smoke from entering the smoke collecting chamber to being sucked in by the fan. When the fan generates negative pressure, a directional airflow will be formed in the smoke collecting chamber, guiding the oil smoke to flow along the preset path to avoid the oil smoke retention caused by the tortuosity of the channel. This smooth airflow path allows the suction of the fan to be fully utilized, and even a large amount of oil smoke generated during stir-frying can be quickly sucked away.
The silent motor and shock-absorbing structure of the fan reduce the operating noise. The motor adopts high-precision bearings and optimized winding design, and the mechanical friction sound during operation is greatly reduced. At the same time, shock-absorbing pads are installed between the motor and the housing of the household range hoods. These pads are made of elastic material, which can absorb the vibration generated when the motor is running and prevent the vibration from being transmitted to the housing to generate resonance noise. This design that reduces noise generation and transmission from the source keeps the noise of the fan at a low level at high speed.
The silencer design of the air duct further reduces airflow noise. The inner wall of the air duct between the fan and the exhaust pipe is made of sound-absorbing materials, such as porous foam or sound insulation cotton, which can absorb the friction sound and eddy noise generated by the high-speed flow of air. The shape of the air duct is designed to be a smooth curve to avoid right angles or sudden changes in diameter, reduce the turbulence formed by the airflow at the turn or change in diameter, allow the airflow to pass smoothly, reduce the noise from the aerodynamic point of view, and ensure that the sound is softer when the suction is high.
The intelligent speed regulation function of the fan balances the suction and noise. When the cooking is in the stage with less oil smoke (such as stewing), the fan automatically adjusts to low speed operation, at which time the noise is lower; when stir-frying produces a lot of oil smoke, it immediately switches to high-speed mode, increases the suction in a short time, and quickly drops after the oil smoke is sucked out. This on-demand adjustment method avoids the continuous noise caused by the long-term high-speed operation of the fan, concentrates the noise pollution in the necessary smoking period, and reduces interference with daily use.
The dynamic balance correction of the impeller reduces additional noise. The impeller undergoes a precise dynamic balance test before leaving the factory to ensure that the center of gravity is stable during rotation and no shaking noise is generated due to eccentricity. Even if the impeller is contaminated with a small amount of oil after long-term use, its balance state is not easily destroyed and it can still maintain stable rotation, avoiding vibration noise and efficiency reduction caused by impeller imbalance, so that the fan can always maintain low-noise operation during long-term use.
In addition, the sealing design of the fan prevents noise leakage. The connection between the fan and the housing of the household range hoods uses sealing strips to reduce the gap and prevent the noise of the fan from spreading to the outside through the gap during operation. At the same time, there is also a sealing device at the interface between the exhaust pipe and the public flue, which prevents the backflow of oil smoke while blocking the echo and noise in the flue from being transmitted back to the kitchen. This all-round sealing design allows the noise generated by the fan to be limited to the inside of the household range hoods as much as possible, further reducing the noise pollution to the kitchen environment.
Through multiple measures such as fan structure optimization, application of noise reduction materials, and intelligent operation adjustment, the high-suction fan design successfully achieves the dual goals of quickly capturing oil smoke and reducing noise pollution, allowing household range hoods to provide a comfortable user experience while efficiently purifying the kitchen air.
