CN2408279Y

CN2408279Y - Centrifugal fan

Info

Publication number: CN2408279Y
Application number: CN 00227095
Authority: CN
Inventors: 邓国平
Original assignee: HUAWEI FAN Manufacturing Co Ltd SHUNDE CITY
Current assignee: HUAWEI FAN Manufacturing Co Ltd SHUNDE CITY
Priority date: 2000-01-11
Filing date: 2000-01-11
Publication date: 2000-11-29
Anticipated expiration: 2010-01-11

Abstract

The utility model relates to a centrifugal fan. The utility model comprises a spiral casing and a motor fixedly connected with the spiral casing, wherein, an air door and an air outlet are arranged on the casing, and an air inlet is arranged on the air door. The utility model is characterized in that the utility model also comprises one worm wheel, wherein, a wheel hub of the worm wheel is fixedly connected with a rotating shaft of the motor through keys; an air suction opening of the worm wheel is opposite to the air inlet of the casing, an air outlet channel is formed between an air outlet for leaf blades of the worm wheel and the casing, and the air outlet channel is communicated with the air outlet. The utility model raises the pressure of ejected gas; the utility model has the advantages of cabinet and beautiful appearance, simple structure and low price.

Description

Centrifugal blower

The utility model relates to a kind of centrifugal blower.

The present centrifugal blower that uses, generally by casing, be located at the blower fan that impeller in the casing and impeller are rotated.It is the rotation by impeller, and the gas that sucks is improved pressure, sprays from exhaust outlet again; The gas pressure of its ejection is lower, and it self volume ratio is bigger and heavy.

The purpose of this utility model provides and a kind ofly can spray the big gas of pressure, little, the lightweight centrifugal blower of volume.

In order to achieve the above object, the utility model is achieved in that casing that comprises volute and the motor of fixedlying connected with casing; On casing, be provided with air door and exhaust outlet, on air door, be provided with wind inlet; It is characterized in that: it also comprises a worm gear, and the wheel hub of worm gear is fixedlyed connected with the rotating shaft of motor by key; The worm gear air sucking mouth is facing to the wind inlet of air door; Form the air-out passage between the exhaust outlet of wormwheel blade and the casing, this exhaust passage is communicated with the exhaust outlet of casing.It is arc that the blade of worm gear all is, and vertical equidistant of every blade is located on the circumference of worm gear wheel plate, and the circle edge of they and wheel plate has an angle: 110 °≤α≤155 °.

The utility model compared with prior art has following advantage:

1, improved the pressure of ejection gas;

2, profile is small and exquisite, attractive in appearance, and is in light weight;

3, simple in structure, low price.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1.

Below in conjunction with drawings and Examples the utility model is done further detailed description:

As shown in Figure 1, 2, comprise the casing 3 of volute and the motor 1 of fixedlying connected with casing 3; On casing 1, be provided with air door 10 and exhaust outlet 13; It also comprises a worm gear 9, and the wheel hub 5 of worm gear 9 is fixedlyed connected with the rotating shaft 2 of motor 1 by key 4; Worm gear air sucking mouth 11 is facing to the wind inlet 12 of air door 10; Form air-out passage 7 between the exhaust outlet of wormwheel blade 8 and the casing 3, this air-out passage 7 is communicated with exhaust outlet 13.It is arc that wormwheel blade 8 all is, and vertical equidistant of every blade 8 is located on the circumference of worm gear wheel plate 6, and the angle α of the circle edge of they and wheel plate 6 equals 135 °.During work, connect power supply, worm gear 9 rotations suck wind from wind inlet 12, from exhaust outlet 13 ejections.

Claims

1, a kind of centrifugal blower comprises the casing of volute and the motor of fixedlying connected with casing; On casing, be provided with air door and exhaust outlet, on air door, be provided with wind inlet; It is characterized in that: it also comprises a worm gear (9), and the wheel hub (5) of worm gear (9) is fixedlyed connected with the rotating shaft (2) of motor (1) by key (4); Worm gear air sucking mouth (11) is facing to the wind inlet (12) of air door (10); Form air-out passage (7) between the exhaust outlet of wormwheel blade (8) and the casing (3), this air-out passage (7) is communicated with the exhaust outlet (13) of casing (3).

2, centrifugal blower according to claim 1, it is characterized in that: wormwheel blade (8) all is arc, vertical equidistant of every blade (8) is located on the circumference of worm gear wheel plate (6), and the circle edge of they and wheel plate (6) has an angle: 110 °≤α≤155 °.