Low-noise diversion volute of range hood

Abstract

The invention relates to a low-noise diversion volute of a range hood. The low-noise diversion volute comprises a volute body, an impeller is mounted in the volute body, and the upper outlet of the volute shell is connected with the range hood through a flange; the volute body comprises a volute plate which is enclosed to form an annular diversion space, and the inversion space is provided with a notch; volute protecting plates are respectively mounted on axial sides of the diversion space, each volute protecting plate is provided with an air inlet, and upper ends of the volute protecting plates and the notch end of the volute plate are enclosed to form an outlet; a curved-surface diversion structure is mounted on the outer side of the volute plate and comprises a diversion plate and supporting plates symmetrically located at two ends of the diversion plate, and two sides of the supporting plates and two sides of the diversion plate are respectively fixedly connected between the volute protecting plates. Airflow resistance of the range hood is effectively reduced through combination of guidance of the curved-surface diversion structure and guidance of the circular-arc surfaced volute plate, the situation of turbulent flow is improved, and flow-induced noise outside the volute and aerodynamic noise of the impeller are reduced.

Description

technical field [0001] The invention relates to the technical field of range hoods, in particular to a guide volute of the range hood. Background technique [0002] In addition to meeting the requirements of air volume and air pressure, low noise has gradually become the goal pursued by customers and range hood manufacturers. Most of the existing range hood products are composed of a simple shell and impeller volute, without any diversion measures outside the volute, the airflow enters the cavity from the air inlet net, and after obviously colliding with the bottom of the volute shell, it passes through the volute air inlet ring Entering the volute, at this time, due to the impact of the airflow, the large airflow resistance loss and the formation of turbulent flow will inevitably affect the aerodynamic performance of the range hood (that is, the air volume and pressure) and the flow field in the cavity, resulting in increased noise. Contents of the invention [0003] Aim...

AI Technical Summary

Problems solved by technology

Most of the existing range hood products are composed of a simple shell and impeller volute, without any diversion measures outside the volute, the air flow enters the cavity from the air inlet net, and after obviously colliding with the bottom of the volute shell, it passes through the volute air inlet ring Entering the volute, at this time, due to the impact of the air flow, the loss of air flow resistance and the formation of turbulent flow will inevitably affect the aerodynamic performance of the range hood (that is, the air volume and pressure) and the flow field in the cavity, resulting in increased noise.

Images