Range hood with flow-stabilizing and noise-reducing structure

Abstract

The invention relates to a range hood with a flow-stabilizing and noise-reducing structure. The range hood comprises a housing (1) with an air inlet (11) and an air outlet (12), wherein a volute housing (2) with a front air inlet (21) is mounted in the housing, and an impeller (4) which is driven by a motor (3) to rotate is mounted in the volute housing; and the range hood is characterized in that a diversion cover (6) for leading smoke gas from the air inlet of the housing to the front air inlet of the volute housing is fixedly arranged on a front cover plate of the volute housing, and a front smoke guide channel (7) with caliber which is gradually reduced from bottom to top is formed between the diversion cover and the front end surface of the volute housing. The front smoke guide channel with the caliber which is gradually reduced from bottom to top is conductive to accelerating the rise of gas flow, thus the swirl and gas loss in the front smoke guide channel can be reduced, the corresponding air volume is increased, the speed of sucking away oil smoke is accelerated, and the effect of sucking the oil smoke is improved; and simultaneously, the diversion cover can control the air inlet direction, and ensures that disorganized gas flow is changed into the way of entering in a directional and ordered way, and the conditions for generating eddy flow is reduced, thereby reducing the noise of the range hood.

Description

technical field [0001] The invention belongs to the technical field of range hoods, in particular to a range hood with a steady flow and noise reduction structure. Background technique [0002] The range hood with centrifugal fan is very popular because of its relatively large suction, low noise and no need to clean for a long period of operation. Existing range hoods using centrifugal fans generally include a casing with an air inlet and an air outlet, a smoke collecting hood is installed at the air inlet of the casing, an oil filter screen assembly is installed on the smoke collecting hood, and a The volute, the front and rear ends of the volute are formed with a front air inlet and a rear air inlet, the upper end of the volute has an upper air outlet connected to the air outlet of the casing, and a multi-wing centrifugal impeller driven by a motor is installed inside the volute. The front-end smoke inlet channel is formed between the front air inlet of the volute and the...

AI Technical Summary

Problems solved by technology

The cross-sectional area of ​​the existing front-end oil fume passages is fixed, so as the oil fume rises, the flow velocity of the oil fume will change in speed in the front-end oil fume passage, especially if the flow speed of the oil fume in the rear section is slower than the flow velocity of the oil fume in the front section. As a result, wind pressure, wind resistance and other parameters are not conducive to the inhalation and discharge of oil fume. Therefore, the effect of exhausting oil fume in the existing range hood needs to be improved. conditions, the range hood is noisy

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