Method for generating volute profile, volute, fan system and range hood

Abstract

The invention discloses a method for generating a volute profile line, comprising the following steps: 1) determining at least three positioning points with characteristic meanings in the center of the circle, the characteristic meanings being the positioning of the volute tongue, the height of the volute or the width of the volute; 2) With the center of the circle as the origin, according to the coordinates of each positioning point, the volute is determined by curve fitting; 3) After each positioning point is determined, the coefficient m of the Archimedes or logarithmic spiral is deduced in reverse, and then Use the smooth curve to pass through the corresponding m value of each anchor point, fit the curve diagram about m, wherein it is the angle formed by this point and the initial radial section of the volute; 4) then pass through Archimedes or pair Counting helix formula:, calculate the value under different values, and get the corresponding corrected volute shape line. Also disclosed are the volute produced according to the above method, a fan system using the above volute, and a range hood using the above fan system.

Description

technical field [0001] The invention relates to a power system, in particular to a method for generating a volute, a volute obtained by the method, a fan system using the volute, and a range hood using the fan system. Background technique [0002] A centrifugal fan is generally composed of a volute, a motor, and an impeller. The working principle of the centrifugal fan is that the motor drives the impeller to rotate to do work on the air flow, and it is discharged radially through the diffusion effect of the volute. [0003] The volute and volute profile of the existing centrifugal fans are usually designed using conventional logarithmic spirals and Archimedes spirals. For example, the Chinese patent application number 201510135345.2 discloses a volute of a range hood, including a volute front plate, a volute rear plate, a volute flange, and a volute coaming plate connecting the volute front plate and the volute rear plate , the volute coaming connects the volute front pla...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned traditional design methods assume that the flow parameters on the inlet circumference are uniformly distributed and the air flow moment in the volute is constant. The aerodynamic performance and noise performance of the fan system using this design idea on the range hood are not good; in addition, the volute The dimensions on the molding line are too strongly correlated. For example, increasing the width will inevitably affect the height, and the change of the volute tongue gap will inevitably affect the outlet size, which cannot be reasonably limited according to the requirements of the box body (often there are restrictions on height and width). The size of each dimension of the volute achieves the best performance

Images