Eddy type impeller for smoke exhaust ventilator

Abstract

The invention discloses an eddy type impeller for a smoke exhaust ventilator, which comprises an impeller disc (1), blades (2) and an impeller cover (3). The invention adopts the technical scheme that the eddy type impeller disclosed consists of the impeller disc formed by a rotating double-curved surface, the impeller cover and the thin piece-shaped blades which are respectively unfolded in a bending way in the form of an involute along a levorotatory spiral, wherein the impeller cover and the impeller disc are coaxial and are arranged outside the impeller disc, and the plurality of blades are radically and evenly surrounded, arranged and fixedly arranged between the impeller disc and the impeller cover, so that a plurality of passageways which are mutually sealed one by one, are unfolded in a bending way in the form of the involute according to the spiral, and have the quadrangular cross sections can be formed. The airflow noise can be reduced by reducing the turbulent flow, and the energy switch rate between the blades and the airflow can be improved by driving the air through the sequential circulating of an air eddy involute track, so that the flow speed, the pressure and the flow of the airflow which passes through the passageways can be improved; and the blades of the smoke exhaust ventilator achieve the aims of improving the wind pressure, increasing the wind pumping and sucking quantity, improving the efficiency and reducing the noise.

Description

technical field [0001] The invention relates to a fan impeller, in particular to a vortex type impeller used for a range hood. Background technique [0002] The range hood is a household kitchen appliance. The range hood drives the impeller to rotate through the motor to suck and discharge the oil fume in the kitchen to the outside. The impellers of the range hood in the prior art are divided into two types: axial flow type and centrifugal type. Among them, the advantage of the axial flow impeller is that the noise is small, and the disadvantage is that the wind pressure is small, the suction air volume is small, the efficiency is low, and the oil fume is not sucked smoothly; the centrifugal type has a large wind pressure and a large suction air volume, but the noise is also surprisingly large. ; Therefore, there are problems and deficiencies in the prior art that the wind pressure is small, the suction air volume is small, the efficiency is low and the noise is large. Con...

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Problems solved by technology

[0002] The range hood is a household kitchen appliance. The range hood drives the impeller to rotate through the motor to suck and discharge the oil fume in the kitchen to the outside. The impellers of the range hood in the prior art are divided into two types: axial flow type and centrifugal type. Among them, the advantage of the axial flow impeller is that the noise is small, and the disadvantage is that the wind pressure is small, the suction air volume is small, the efficiency is low, and the oil fume is not sucked smoothly; the centrifugal type has a large wind pressure and a large suction air volume, but the noise is also surprisingly large. ; Therefore, there are problems and deficiencies in the prior art that the wind pressure is small, the suction air volume is small, the efficiency is low and the noise is large

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