Range hood

Abstract

A range hood comprises a cooking fume collecting hood and a cooking fume guiding plate and is characterized in that the lower bottom surface of the cooking fume collecting hood is inclined in an obliquely downward direction from front to back; the cooking fume guiding plate is inclined in an obliquely downward direction from front to back; and in addition, the inclination angle beta of the lower bottom surface of the cooking fume collecting hood relative to the horizontal plane is smaller than the inclination angle theta of the cooking fume guiding plate relative to the horizontal plane. The range hood has the advantages as follows: according to the range hood, through cooperation of the cooking fume guiding plate and the cooking fume collecting hood, the flow field intensity of the rangehood is subjected to gradient change, the gradually-varied flow speed is formed, the Bernoulli's effect is formed due to the flow speed difference, cooking fume is prevented from rushing to the frontpart of the range hood at the excessively-high speed, the cooking fume guided from the back end to the front end by the aid of the cooking fume guiding plate is sucked into a fan system, and the cooking fume suction effect is substantially improved; and besides, according to the range hood, the more stable flow field is favorably formed in a channel on the back side of the cooking fume collectinghood, and larger instantaneous impact cooking fume can be coped, so that escape of the cooking fume can be prevented, and the problem that escape of the cooking fume usually occurs on the back side ofan European style range hood is solved.

Description

technical field [0001] The invention relates to a range hood. Background technique [0002] At present, in the case of the same fan system, compared with the side-suction range hood, the European-style range hood has a different mechanism for the oil fume to be sucked into the range hood, and the effect of the range hood will also be different. The depth of the front chamber and the depth of the rear chamber of the smoke collection hood of the existing European-style range hood are the same, so that the front and rear negative pressure heights are equal, which is not conducive to the formation of a stable flow field at the rear of the smoke collection hood, and, Due to the fact that the wall on the rear side of the range hood hinders the gas supply, it is easy to generate smoke at the rear side of the fume collection hood when the range hood is working. In order to improve the effect of the range hood, people have improved the structure of the range hood, such as the "Cooke...

AI Technical Summary

Problems solved by technology

The depth of the front chamber and the depth of the rear chamber of the smoke collection hood of the existing European-style range hood are the same, so that the front and rear negative pressure heights are equal, which is not conducive to the formation of a stable flow field at the rear of the smoke collection hood, and, Due to the fact that the wall on the rear side of the range hood hinders the gas supply, it is easy to generate smoke at the rear side of the fume collection hood when the range hood is working.

In order to improve the effect of the range hood, people have improved the structure of the range hood, such as the "Cooker Hood" disclosed in the Chinese Utility Model Patent No. 201620308240.2 (the authorized announcement number is CN 205619395U). Hood and movable fume collecting hood. The movable fume collecting hood can move up and down relative to the fixed fume collecting hood. Although the range hood realizes the change of the internal flow field of the fume collecting hood by adjusting the width and depth of the fume collecting hood. The effect of collecting smoke is good, and it takes up little space when it is closed. However, it needs to set up two smoke collecting hoods, a fixed smoke collecting hood and a movable smoke collecting hood. Part of the fume from the rear side of the range hood is smoothly directed to the front side, and there is still a phenomenon of running smoke at the rear side of the range hood, so the effect of the range hood cannot be greatly improved

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