For high-rise residential users, the daily cooking time, the public chimney will concentrate on a large amount of soot, resulting in poor kitchen exhaust, soot pouring problem. Gale hood is born in response to this pain point, then it What technology is used to solve the problem of soot backflow?
Why is the traditional range hood soaking oil fumes?
First, how does the traditional range hood prevent the soot from being poured? Generally, after the soot is inhaled, it is discharged into the public flue through a component called a 'check valve'. The valve of the check valve is a self-weight closing structure because the traditional soot The wind pressure of the machine is insufficient, and the generated wind is not enough. Therefore, the weight of the valve of the check valve cannot be too large, and as a result, the valve closing force is small, and the valve piece is easily adhered by grease.
Check valve in the hood
After the valve plate is stuck, the check valve is opened and the switch is not in position. The result of not being in the open position is that the exhaust air is not smooth, and the air volume is attenuated; the result of the shutdown is that a large amount of oil fume is poured. There is also when the neighbor's range hood is running. The local pressure in the public flue will increase, and the anti-reverse valve ring will be reversely pressed to form a reverse irrigation. Therefore, only when the wind of the range hood is large enough, it can ensure better switching of the check valve and also There is enough pressure in the public flue of the house to ensure the discharge of soot.
Opening and closing of check valve
Compared with the traditional range hood, the wind pressure hood can generate huge wind pressure when working, and the wind pressure determines the efficiency of the range hood to suck the kitchen fumes, and also determines the size of the wind in the public chimney. 18-24 layers For example, the size of the residential flue is the largest hood in the market. The soot in the 3m3 space can be completely drained in one minute, and there is no problem of flue congestion and backflow. It can also form 22m3 in the public flue. The wind of /min can not only make its own soot discharge faster, but also drive the flow rate of the entire public flue, making the smoke exhaustion of the whole building smoother.
Several major technologies of large wind pressure hood
At present, the wind pressure range hood in the domestic market mainly overcomes the difficulties by using variable frequency motor, pressurized air duct and air outlet, wing impeller, air guide ring and other technologies.
1, the motor: The motor is the core of the large wind pressure range hood. At present, there is a large-wind pressure hood motor using intelligent frequency conversion technology on the market, equipped with Smart Power3.0 version of the variable frequency drive system, which can achieve 600-2000 rev / min (12000 rev / h Wide-width speed regulation. Variable frequency drive can realize stepless speed conversion and precise adjustment of stepless air volume. At the same time, the motor can also cooperate with intelligent wind pressure reinforcement system to solve the problem of unstable suction when existing pressure changes occur. The air volume is lost from beginning to end, and the suction is constant throughout the cooking. When the pressure of the common flue changes, the pressure can be adjusted by adjusting the output power of the motor at any time, so that the exhaust is smooth, and the running noise of the motor is only 53dB during the whole operation.
2, pressurized air duct and air outlet: The main body of the pressurized air duct is volute type design, the integrated air duct is involute design, which makes the air duct diversion, the supercharging effect is obvious, and the air flow direction is more accurately grasped. The oil fume can be discharged strongly along the pressurized air passage even if it encounters strong resistance. The air flow passage of the slow flow design forms a complete diffusing passage with the inner cavity of the volute, minimizing the turbulence of the outlet and eliminating the backflow of the airflow. , vortex and other phenomena, make the wind smooth, increase the air volume and wind pressure, reduce noise.
Variable frequency drive system
3, the bird's impeller: the bird turbine is fully optimized on the basis of the traditional patented turbine in terms of diameter, thickness, number of blades, and ratio of the pressure plate, making it more suitable for the existing air duct design, the most important is to form a better Boosting effect. The inlet end is sinusoidal waveform structure, and the outlet end is triangular serrated structure. The waveform curve is adjusted, the peak is lower, and the airflow buffer is better.
4, the air guiding ring: the air guiding ring is lower than the upper end surface of the impeller, reducing the pressure loss of the impeller at the air inlet, increasing the pressure of the centrifugal fan, and preventing the oil from appearing on the upper end surface of the impeller when the impeller rotates at a high speed.
Through the above several technologies, the range hood can achieve high wind pressure and solve the problem of soot backflow. In general, it is technically difficult for the range hood to achieve large wind pressure. At present, the high pressure hood is still high-end in the domestic market. product.
