A kitchen small tornado fume extraction system and its rotary air curtain generator

Abstract

The invention relates to a kitchen small tornado lampblack sucking system. The kitchen small tornado lampblack sucking system comprises an extractor hood, and is characterized by further comprising a rotary air curtain generator; the rotary air curtain generator and the extractor hood are arranged in a split manner, the rotary air curtain generator is located under the extractor hood, generates a rotary air curtain which rotates upwards and shields to-be-sucked lampblack below the extractor hood, and the to-be-sucked lampblack forms the tornado movement locus under the joint effects of the rotary air curtain and a draught fan system of the extractor hood. The kitchen small tornado lampblack sucking system has the beneficial effects that the rotary air curtain generator and the extractor hood are arranged in a separated manner, the rotary air curtain generator can be jointly used with extractor hoods in different models, the rotary air curtain generator is simple in structure, the generated rotary air curtain is stable, the kitchen small tornado lampblack sucking system with the rotary air curtain generator can generate stable tornados, the lampblack sucking effect is good, the practicability is greatly strengthened, and the installation manner of the rotary air curtain generator is relatively flexible.

Description

Technical field [0001] The invention relates to the field of range hoods, in particular to a kitchen small tornado range hood system and a rotating air curtain generator. Background technique [0002] Range hoods are the main means of collecting oil smoke in the kitchen. How to improve the suction efficiency of range hoods has always been an important content of range hood design and research. The smoke extraction process of a traditional range hood can be regarded as point-and-sink suction, such as Figure 5 As shown, the law of point-sink suction is that the flow rates on the constant velocity spheres at different distances from the sink point are equal. As the distance from the sink point increases, the flow velocity decays quadratically, so the energy attenuation of the inspiratory airflow is very Fast, resulting in a small suction area that the range hood can actually affect. Therefore, if technical means can be used to limit the oil fume to a certain area, the realization o...

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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 "A Kind of Rotary Air Curtain Range Hood with Oil Fume Filtering Device", the principle of the range hood to generate the 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 driven by the fan through the small slits. The horizontal rotating air curtain is sent out from the center, thereby forming 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 by 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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