Range hood

Abstract

A range hood comprises a draught fan, a draught fan outer cover and an exhaust fume collecting hood. The draught fan comprises a volute with a main air outlet. Auxiliary air outlets are formed in the left side and the right side of the volute correspondingly. Movable fume blocking plates are installed on the left side and the right side of the exhaust fume collecting hood correspondingly. The movable fume blocking plates can extend out of the exhaust fume collecting hood downwards or retract into the exhaust fume collecting hood upwards. A gas flow cavity is formed in each movable fume blocking plate. An upper air inlet and a lower air outlet are formed in the upper side and the lower side of each gas flow cavity correspondingly. Each upper air inlet communicates with the auxiliary air outlet in the corresponding side. Spray nozzles with jet orifices formed in a vertical or obliquely-downward manner are installed at the positions of the lower air outlets. The range hood has the beneficial effects that according to the range hood, the movable fume blocking plates are driven to rotate around the exhaust fume collecting hood through drive mechanisms correspondingly, are drawn back when not working and are stretched out when working, the negative pressure area distribution extends downwards, and escape of rising cooking fumes is reduced; and after the jet orifices are formed downwards, gas flow ejected out through the jet orifices can achieve the air curtain effect on the two sides of the exhaust fume collecting hood, and therefore the cooking fumes are more effectively prevented from escaping from the two sides of the exhaust fume collecting hood.

Description

technical field [0001] The invention relates to a range hood. Background technique [0002] At present, the overall installation height of the European-style range hood determines that the range hood is far away from the pot that produces the oil fume, and the negative pressure loss is relatively large. Also, traditional range hoods cannot suck the fumes back once they leave the area. In order to improve the range hood effect of the range hood, people have improved the structure of the range hood, and the usual method is to improve the fan system of the range hood, such as increasing the power of the fan, such as improving the structure of the impeller, etc. etc. Although this improvement can effectively improve the range hood's range hood effect, it needs to improve the structure of the entire fan system, which is not only more complicated, but also cannot improve the distribution of the negative pressure area when the range hood is working, and the negative pressure loss ...

AI Technical Summary

Problems solved by technology

The deficiencies of the range hood with the above-mentioned smoke baffles mainly include: the movable smoke baffles are all flat plate structures, and because the height of the smoke collecting hood itself is limited, the movable smoke baffles that protrude up and down only have relatively The movable smoke baffle with a small extension height can be hidden in the smoke collecting hood as a whole, and the smoke baffle effect of the movable smoke baffle with a small extension height is relatively poor

For the movable smoke baffle that extends horizontally, although the wider smoke baffle can be retracted and hidden in the smoke collection hood, it cannot make the negative pressure area extend downward, and the smoke baffle effect is relatively poor

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