Ejection auxiliary device of extractor hood

Abstract

The invention discloses an ejection auxiliary device of an extractor hood. The device is characterized by comprising an air outlet device extending around an axis; the air outlet device comprises an air storage cavity and an air outlet nozzle communicating with the air storage cavity; along the air flow direction, the air outlet nozzle is formed on the end portion, relative to the upstream, of the air outlet device; the air outlet nozzle is provided with an outlet which faces the downstream and inclines toward the axis, so that the air flow ejected from the air outlet device forms an ejection flow field which inclines toward the axis from upstream to downstream. By designing the ejection auxiliary device, the ejected air flow forms an ejection flow which can entrain surrounding lampblack air flows together to flow to a smoke collecting cavity of the extractor hood, and meanwhile, the air pressure of the downstream of the air outlet device will be reduced to generate a pressure gradient so as to guide more lampblack air flow below to enter the ejection air flow. The ejection auxiliary device is arranged on the upstream of the air inlet of the extractor hood and is matched with a main draught fan in a draught fan hood, and the distance from the ejection auxiliary device to cookware and pan surfaces is shortened, so that the smoke drawing and controlling ability and the anti-interference ability are improved.

Description

technical field [0001] The invention relates to a range hood, in particular to an ejection auxiliary device of the range hood. Background technique [0002] The range hood has become one of the indispensable kitchen appliances in modern families, and it is used to exhaust the oil fume produced during the cooking process of the stove. Generally, range hoods include top-suction and side-suction types, and top-suction range hoods are more and more widely used due to their neatness, lightness, and small footprint. The top-suction range hood usually includes a fume collecting hood, a fan casing positioned on the fume collecting hood, and a centrifugal fan is installed in the fan casing. [0003] Commonly used top-suction range hoods, such as a range hood disclosed in Chinese Patent Application No. 201410704669.9, include a smoke collection hood with an air suction port, a wind cabinet arranged on the top of the smoke collection The fan with a volute inside, through the action o...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned top-suction range hood has the advantages of being classic and beautiful, but also due to the limitation of installation size, the height from the stove top is required to be 650-750cm, and it is known that the flow velocity is twofold with the increase of the distance from the suction port. Sub-power attenuation, so it has a great impact on the effect of oil fume, and the anti-interference is poor, and needs to be further improved

Images