CN2756877Y

CN2756877Y - Centrafugal fan impeller for fume exhaust fan

Info

Publication number: CN2756877Y
Application number: CN 200420114762
Authority: CN
Inventors: 茅忠群
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2004-12-24
Filing date: 2004-12-24
Publication date: 2006-02-08
Anticipated expiration: 2014-12-24

Abstract

The utility model relates to a centrifugal fan impeller for a fume exhaust fan, which comprises a front ring (1), a back ring (2), a wheel disk (3) and a plurality of blades (4), wherein the wheel disk (3) is fixed at the central position of the back ring (2); the front ring (1) corresponds to the back ring (2); both ends of each blade (4) are respectively fixed on the front ring (1) and the back ring (2), and at least two through holes (21) are arranged on the back ring (2). Compared with the prior art, an airflow channel is added by the holes arranged on the back ring; thereby, when the fan impeller works, the airflow channel which makes air ventilation in double directions can be formed along the axial direction, and the heat and the humidity which accumulate in the fume exhaust fan can be drawn away quickly; so that the flow property of the air is improved, and the motor can well radiate heat simultaneously. Thus, the stability of the motor is raised, and the service life of the motor is prolonged. Furthermore, after the holes are arranged at the back ring, the whole weight of the fan impeller is reduced to decrease the load of the motor, which is favorable for raising the efficiency and the output torque of the motor.

Description

A kind of centrifugal blower fan blade wheel that is used for range hood

Technical field

The utility model relates to a kind of draught fan impeller, particularly a kind of centrifugal blower fan blade wheel that is used for deep kitchen ventilator.

Background technique

Adopt the range hood of centrifugal fan, because its suction is big, noise is little and be subjected to Consumer's welcome deeply, this centrifugal fan generally comprises preceding circle, the back circle, wheel disc and some blades, Qian Quan is relative with the back circle, the blade two ends are separately fixed on the edge of Qian Quan and back circle, wheel disc then is fixed on the central position of back circle, motor shaft is fixed on wheel disk center and drives the blower fan rotation in use, is exactly like this as our " a kind of centrifugal blower fan blade wheel structure that is used for deep kitchen ventilator " of formerly Chinese utility model patent ZL98225550.0 (publication number is CN2345760Y).But find in practice, such centrifugal blower also exists such defective, promptly because the back circle is enclosed shape, oil smoke ventilates through fan blade single channel Scroll-type ground, for the damp and hot air that accumulates in range hood inside, can not discharge fast, and motor itself can heat up when work, if motor can not well dispel the heat, can influence the stability and the working life of motor in the course of time.

Summary of the invention

Technical problem to be solved in the utility model is the centrifugal blower fan blade wheel that is used for range hood that the quick exhaust of a kind of energy, heat radiation are provided at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: this is used for the centrifugal blower fan blade wheel of range hood, include Qian Quan, Hou Quan, wheel disc and some blades, Qian Quan is relative with the back circle, the blade two ends are separately fixed at the edge of Qian Quan and back circle, wheel disc then is fixed on the central position of back circle, it is characterized in that having two through holes at least on the circle of described back.

Each through hole on the described back circle with size identical and circumferentially uniform along the back circle be good, with the instability of avoiding off-centre to cause, the shape of through hole can be chosen wantonly, but in order to strengthen the effect of exhaust, heat radiation, be design principle to the maximum to pursue equal conditions lower through-hole area, generally can adopt curved waist hole, fan-shaped waist hole or circular hole.

Compared with prior art, the utility model has increased the passage of air-flow by perforate on the circle of back, when making draught fan impeller work, form bidirectional ventilated vertically air-flow path, can soon the heat and the moisture that accumulate in range hood inside be taken out of, improve the mobile performance of air; Motor also can well dispel the heat simultaneously, thereby improves the stability and the working life of motor; And, after the circle perforate of back, alleviated the overall weight of draught fan impeller, the load of motor is descended, more help the raising of electric efficiency and output torque.Through evidence, motor heats up and on average descends 5～10 ℃, and air quantity, blast, noise index all have corresponding improvement simultaneously.

Description of drawings

Fig. 1 is the utility model embodiment one a schematic perspective view;

Fig. 2 is the utility model embodiment one a structure cross-sectional schematic;

Fig. 3 is the plan view of Fig. 2 of circle end face after being used for showing.

Fig. 4 is a back circle end-face structure schematic representation among the utility model embodiment two;

Fig. 5 is a back circle end-face structure schematic representation among the utility model embodiment three;

Fig. 6 is a back circle end-face structure schematic representation among the utility model embodiment four;

Embodiment

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

Shown in Fig. 1～3, be embodiment one of the present utility model, circle 1, back circle 2, wheel disc 3 and some blades 4 before it includes, preceding circle 1 is relative with back circle 2, the edge of circle 1 and back circle 2 before blade 4 two ends are separately fixed at, 3 on wheel disc is fixed on the central position of back circle 2, and circle 2 upper edges, described back circumferentially are evenly equipped with three through holes 21, and it is shaped as circular arc waist shape.

Be illustrated in figure 4 as embodiment two of the present utility model, only be that with embodiment one difference described curved waist hole number is four.

Be illustrated in figure 5 as embodiment three of the present utility model, only be that with embodiment one difference through hole 21 is fan-shaped waist hole on the circle 2 of described back.

Be illustrated in figure 6 as embodiment four of the present utility model, only be that with embodiment one difference through hole 21 is circular hole on the circle 2 of described back, and quantity be six.

Claims

1, a kind of centrifugal blower fan blade wheel that is used for range hood, include preceding circle (1), back circle (2), wheel disc (3) and some blades (4), wheel disc (3) is fixed on the central position of back circle (2), preceding circle (1) is relative with back circle (2), blade (4) two ends are separately fixed on preceding circle (1) and the back circle (2), it is characterized in that having two through holes (21) at least on the described back circle (2).

2, the centrifugal blower fan blade wheel that is used for range hood according to claim 1 is characterized in that the identical and circumferentially evenly distribution of edge back circle (2) of each through hole (21) size on the described back circle (2).

3, the centrifugal blower fan blade wheel that is used for range hood according to claim 2, it is one of following to it is characterized in that through hole (21) on the described back circle (2) is shaped as: curved waist hole, fan-shaped waist hole or circular hole.