Fume exhaust fan of fume focusing cover with air inlet concave chamber

Abstract

Blower fan is installed inside chassis. Inner shell body of fume-collecting hood is installed at low end of chassis. External fume-collecting hood is joined and fixed on inner shell body. There are concave cavities of main air inlet on board of the fume-collecting hood. Multiple main air inlets are made on perisporium of concave cavity. Multiple secondary air inlets are prepared on side plates up bent from two ends of fume-collecting hood. Concave type cavities of secondary air inlets are formed between extended part of external fume-collecting hood and side plates up bent from two ends of fume-collecting hood. When apparatus of sucking oil fume is in use, concave cavities of main air inlets, and concave cavities of secondary air inlets form zone of negative pressure of sucking oil fume. Advantages are: simple structure, goodly outline, and good effect of sucking oil fume. The disclosed cover is suitable to apparatus of sucking oil fume for common people.

Description

technical field [0001] The invention relates to a technique for removing cooking smoke, in particular to a range hood with a smoke collecting hood having an air inlet cavity. Background technique [0002] Currently used range hoods are provided with a corresponding number of range hoods according to the number of burners in the user's stove. The oil suction hole of the commonly used range hood is a large-diameter circular air intake hole, while the smoke collecting hood plate is a flat plate, and the air intake hole is a flat hole on the flat plate. During the process of oil fume floating upward, a small amount of oil fume floats out of the fume collecting hood, resulting in more and more oil fume in the kitchen space, which has a negative impact on the operating environment. The "range hood" disclosed in Chinese patent application number 01276895.2, in addition to two large air inlets, has some air inlets on the vertical peripheral wall of the hood, but because the oil smo...

AI Technical Summary

Problems solved by technology

During the process of oil fume floating upward, a small amount of oil fume floats outside the fume collecting hood, resulting in more and more oil fume in the kitchen space, which has a negative impact on the operating environment

The "range hood" disclosed in Chinese patent application number 01276895.2, in addition to two large air inlets, has some air inlets on the vertical peripheral wall of the hood, but because the oil smoke gas flowing outwards will escape from the range hood When the fume collecting hood spreads rapidly to the surroundings, the oil fume suction effect of the side oil suction hole is not good enough

Chinese Patent Application No. 95244534.4 discloses the "double suction type range hood", two main suction large circular air intake holes on the smoke collecting hood panel, and several small air intake holes are opened on the periphery of the panel. This small air intake hole Also for the oil fume that diffuses to the outside of the range hood, the secondary inhalation rate is even worse, and they cannot prevent the adverse consequences of oil fume polluting the environment

Chinese Patent Application No. 95224919.7 discloses "deep range hood with smoke collection chamber". This structure increases the height of the range hood. In order to increase the cross-sectional area of ​​the smoke collection chamber, the bent plate of the smoke collection hood needs to be longer, thereby increasing the volume of the range hood overall. The feeling of the head, and it is not beautiful, and the oily fumes are diffused outwards, which cannot be sucked away

And the structure is very complicated, the appearance is not beautiful, and the effect of absorbing oil fume is poor

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