CN2451782Y

CN2451782Y - Fan vanes structure for deep kitchen ventilator

Info

Publication number: CN2451782Y
Application number: CN 00259268
Authority: CN
Inventors: 茅忠群
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2000-11-20
Filing date: 2000-11-20
Publication date: 2001-10-03
Anticipated expiration: 2010-11-20

Abstract

The utility model relates to a fan impeller structure for a deep kitchen ventilator, which comprises a front ring, a back ring and a plurality of blades. The front ring and the back ring are corresponding, and both ends of each blade are respectively fixed on the front ring and the back ring. The utility model is characterized in that the blades has 52 blades and are divided into four quadrants. In each quadrant, the spaces (the spacing is the connecting line included angle between the inner sides and the center of circle of the blade in a cross section) between contiguous blades are distributed (according to the inward rotation direction of the self arc of the blades) by adopting the regulation of the following unequal distances which are 7 DEG, 6 DEG, 6.5 DEG, 7 DEG, 7.5 DEG, 7 DEG, 6.5 DEG, 7 DEG, 7.5 DEG, 7 DEG, 6.5 DEG, 7 DEG and 7.5 DEG. The actual test indicates that compared with the existing fan with equal distant between blades, the noise of the utility model fall about 1 decibel under an equal condition.

Description

A kind of draught fan impeller structure that is used for deep kitchen ventilator

The utility model relates to a kind of draught fan impeller structure that is used for deep kitchen ventilator.

Mainly to adopt centrifugal fan to be different from the slim range hood that adopts axial fan, because centrifugal fan suction is big comparatively speaking, noise is little, thereby deep kitchen ventilator has become leading products to deep kitchen ventilator gradually on market.Yet centrifugal fan also has noise after all, particularly by adopting raising blower fan volume and power of fan to improve blower fan suction, the noise that produces also can correspondingly increase to some extent, and how to reduce noise under the situation that does not influence suction effectively is all insoluble problems of kitchen ventilator producer always.

The purpose of this utility model provides a kind of draught fan impeller structure that is used for deep kitchen ventilator that under equal conditions can effectively reduce noise with regard to being at above-mentioned prior art present situation.

The purpose of this utility model is achieved in that the draught fan impeller structure that is used for deep kitchen ventilator comprises preceding circle, back circle and some blades, Qian Quan is relative with the back circle, the blade two ends are separately fixed at preceding circle, on the circle of back, it is characterized in that totally 52 in described blade, be divided into four quadrants, in each quadrant and the spacing between each adjacent blades (referring to the line angle between the blade inboard and the center of circle in the cross section) adopt following equidistant rule to distribute (press blade self arc oneself sense of rotation) outside to inside: 7 °, 6 °, 6.5 °, 7 °, 7.5 °, 7 °, 6.5 °, 7 °, 7.5 °, 7 °, 6.5 °, 7 °, 7.5 °.

Through actual test shows, the utility model blower fan equidistant with having adjacent each blade now compared, and under equal conditions, noise descends about 1 decibel.

Description of drawings:

Fig. 1 is the utility model embodiment's a perspective view.

Fig. 2 is a schematic cross-section of the present utility model.

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As Fig. 1, shown in Figure 2, be the utility model embodiment, circle 1 before the draught fan impeller structure comprises, 3 and 52 blades 2 of back circle, preceding circle 1 is relative with back circle 3, circle 1 before blade 2 two ends are separately fixed at, on the back circle 3,52 blades are by circumferentially being divided into four quadrants, in each quadrant and the spacing between each adjacent blades (refer to the line angle between the blade inboard and the center of circle in the cross section, referring to Fig. 2) adopt following equidistant rule to distribute (press blade self arc from sense of rotation outside to inside, referring to Fig. 2): 7 °, 6 °, 6.5 °, 7 °, 7.5 °, 7 °, 6.5 °, 7 °, 7.5 °, 7 °, 6.5 °, 7 °, 7.5 °.

Claims

1. draught fan impeller structure that is used for deep kitchen ventilator, comprise preceding circle, back circle and some blades, Qian Quan is relative with the back circle, the blade two ends are separately fixed at preceding circle, on the circle of back, it is characterized in that totally 52 in described blade, be divided into four quadrants, in each quadrant and the spacing between each adjacent blades (referring to the line angle between the blade inboard and the center of circle in the cross section) adopt following equidistant rule to distribute (press blade self arc oneself sense of rotation) outside to inside: 7 °, 6 °, 6.5 °, 7 °, 7.5 °, 7 °, 6.5 °, 7 °, 7.5 °, 7 °, 6.5 °, 7 °, 7.5 °.