Extractor hood

Abstract

The invention discloses an extractor hood. The extractor hood comprises a fan outer cover and a cooking fume collecting hood, the cooking fume collecting hood comprises an outer layer cooking fume collecting hood and an inner layer cooking fume collecting hood, an air inlet channel is formed on an air interlayer between the outer layer cooking fume collecting hood and the inner layer cooking fumecollecting hood and is gradually narrowed in the air flow direction, the top of the inner layer cooking fume collecting hood is provided with a cooking fume suction opening communicating with an outlet of the air inlet channel, a flow guide block protruding inwards is formed on the inner wall of the inner layer cooking fume collecting cover, an opening communicating the cooking fume collecting hood with the air inlet channel is formed in the flow guide block, the air inlet channel of the extractor hood is gradually narrowed in the air flow direction, due to existence of inner and outer pressure differences of the opening of the flow guide block, the phenomenon that cooking fume outside the inner layer fume collecting hood impacts the wall face and then escapes can be avoided, the cooking fume is tightly attached to the wall face, due to the gradual increase of inner and outer pressure differences of the openings in the different positions and the Coanda effect, the cooking fume is guided to move upwards slantly along the inner layer cooking fume collecting hood, the cooking fume guide effect is improved, the cooking fume can be continuously sucked to the cooking fume suction opening in the top of the inner layer cooking fume collecting hood, escape of the cooking fume entering in the cooking fume collecting hood can be effectively prevented, and the cooking fume suction effectis improved.

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 above-mentioned range hood increases the smoke-receiving area of ​​the smoke-collecting hood through the cooperation of the smoke baffle and the smoke-collecting hood. Although it can prevent the oil fume from escaping, it needs to open the sm

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