A rotating curtain type tornado range hood

Abstract

A rotating curtain type tornado range hood, including a smoke collecting hood and a fan cover, a fan system is installed in the fan cover, and it is characterized in that: an inlet connected to the air inlet of the fan system is provided at the bottom of the fan cover. In the air channel, a drainage control ring is installed at the bottom of the air inlet channel, and a flow guide ring is installed on the outer periphery of the flow control ring, and is set in the annular ventilation area between the flow control ring and the flow guide ring. There is a rotating curtain air supply device that can generate a rotating downward air curtain below the drainage control circle. The wind blown by the rotating curtain type tornado range hood from the rotating curtain air supply device can form a stable rotating air curtain suitable for the kitchen environment, and then form a tornado under the suction action of the range hood, which has high oil suction efficiency and is practical Strong performance, and the drainage control ring, guide ring and rotary curtain air supply device can be used in conjunction with the fan system without changing the basic shape of the range hood, and the structure is very compact.

Description

technical field [0001] The invention relates to a range hood, in particular to a rotating curtain type tornado range hood. Background technique [0002] The range hood is the main means of collecting fume in the kitchen. How to improve the suction efficiency of the range hood has always been an important content in the design and research of the range hood. The oil extraction process of the traditional range hood can be regarded as a point-sink type suction, such as Figure 5 As shown, the law of point-sink suction is that the flow rate on each isokinetic sphere at different distances from the sink is equal, and as the distance from the sink increases, the flow velocity decays quadratically, so the energy attenuation of the inspiratory airflow is very large. As a result, the suction area that the range hood can actually affect is very small. Therefore, if technical means can be used to limit the range hood to a certain area, the realization of controlled suction of the rang...

AI Technical Summary

Problems solved by technology

[0003] At present, in the prior art, there are various range hoods that can form artificial tornadoes under the range hood, such as the "one A Rotary Air Curtain Range Hood with Oil Fume Filtering Device", the principle of the range hood generating whirlwind is: four pipes protrude from the bottom of the four sides of the range hood, and there are small slits on the pipes, and then the whirlwind is blown from small to small by the fan. The horizontal rotating air curtain is sent out from the slit to form a whirlwind under the suction of the range hood. The main defects of the range hood are: the rotating air curtain has a large shielding area, the energy is not concentrated enough, and the whirlwind blown out of the small slit is weak. , the anti-interference ability is poor, and the structure of the device that generates the rotating air curtain is not compact enough

Another example is "A Tornado Type Range Hood" disclosed in the Chinese invention patent application whose patent number is ZL201310590169.2 (application publication number is CN 103673009 A). After the two fans on the outside pass through the designed channel, although they can form a rotating upward airflow at the outer edge of the air inlet, thereby driving the smoke to be sucked away, but because the smoke is sucked away by the rotating airflow, it will There is only a weak swirling effect at the tuyere, so the height of the tornado will not be very high, and the effect of the range hood cannot be significantly improved

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