CN2470591Y

CN2470591Y - Improved suction fan

Info

Publication number: CN2470591Y
Application number: CN 01218895
Authority: CN
Inventors: 郑传兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-06
Filing date: 2001-04-06
Publication date: 2002-01-09
Anticipated expiration: 2011-04-06

Abstract

An improved draft fan consists of a base, a motor and fan blades. The vanes of the fan blades are arranged with the same space between along the circle of the fan blade body; the roots of the vanes are in helical slant connection with the fan blade body; a wind-cutting chamfer is formed by chamfer cut along the entry edge; the outer edge of the vane goes down from the wind-cutting chamfer, arranged corresponding to the inner curved surface of the base and kept with a preset clearance between, and the lower end of the vane is contacted with the hemline of the body. The utility model has the low-noise wind cutting and guiding function, with the best air draft and blast effect.

Description

The blower fan of improvement

The utility model is a kind of blower fan of improvement, refers in particular to a kind of wind incisal guide of tool low noise and draws usefulness and can obtain maximum screw-in air quantity and it is effectively incited out, has preferable air draught and air-supply effect concurrently.

Heat gun commonly used or the employed blower fan group of blower are shown in Fig. 1-2, and it mainly is a side that motor A is fixedly arranged on pedestal B, make motor A drive its flabellum C rotation of side suit in addition, when flabellum C rotates, but air-guiding screws in, and incites out through flabellum C, and its major defect is:

One, the body of flabellum C is cylindrical, and its outside be the plane, and when flabellum C rotates air-guiding when screwing in, this air-flow can be attacked the outer side plane of flabellum C directly, and causes suitable windage, reduces the air quantity of suction, the relative deficiency in draught of inciting out that makes.

Two, the body of flabellum C is cylindrical, and blade D is located at its body periphery, because of body has occupied certain volume, the feasible space that can provide blade D to be provided with is very narrow and small, the relative area that makes blade D can't effectively increase, when causing flabellum C to rotate, and the deficiency in draught that screws in of guiding.

Three, because the flabellum C body outside is the plane, and when air-guiding screwed in, blade D can't incite out it fast and effectively,, also can cause the noise of blade D back side flow-disturbing and resonance except that because of choke produces the back pressure.

At above-mentioned defective, the inventor is determined to be improved, and through constantly development test, finishes the technical solution of the utility model eventually.

Main purpose of the present utility model is to provide a kind of blower fan of improvement, overcomes the drawback of prior art, and the wind incisal guide that reaches low noise is drawn usefulness, and the purpose of best air draught and air-supply effect.

The purpose of this utility model is achieved in that a kind of blower fan of improvement, by pedestal, motor and flabellum are formed, these pedestal central authorities form the motor dish, the periphery ring of this motor dish is provided with some wind deflectors, this motor is gone into the location from a side of pedestal and is located in this motor dish, it is characterized in that: this flabellum is made of body and blade, this blade equidistantly is located at the periphery that is sphere shape body, the inner face central authorities one of this body has jack-post, this root of blade and body join as spiral inclination, cut sth. askew along its inlet air peristoma and to be formed with the wind cutting inclined-plane, the outer rim of this blade descends from the wind cutting inclined-plane, extend should the pedestal inner edge adopting curved surface, and keep a predetermined gap, the lower end trims mutually with the root edge of body.

This body is spherical surface body or ellipsoid body.The mode that this wind deflector and blade are inverse surface is located on pedestal inner face periphery.

Major advantage of the present utility model is that the wind incisal guide with low noise is drawn usefulness, and best air draught and air-supply effect.

Further specify below in conjunction with preferred embodiment and accompanying drawing.

Fig. 1 is the perspective exploded view of flabellum group commonly used.

Fig. 2 is the air-flow guiding schematic representation of flabellum group commonly used.

Fig. 3 is a perspective exploded view of the present utility model.

Fig. 4 is an air-flow guiding schematic representation of the present utility model.

Fig. 5 is the side-looking enlarged diagram of flabellum of the present utility model.

Fig. 6 is the schematic representation that the utility model is installed in heat gun.

Consult Fig. 3-shown in Figure 4, the blower fan of improvement of the present utility model, form by pedestal 1, motor 2 and flabellum 3, wherein these pedestal 1 central authorities form a motor dish 11, its periphery ring is provided with some wind deflectors 12, this motor 2 is to go into from a side of pedestal 1, and locatees and be located in the motor dish 11, it is characterized in that:

This flabellum 3 is made of body 31 and blade 32, its blade 32 is equidistantly to be located at the periphery that is sphere shape body 31, and the inner face of body 31 central authorities one has a jack-post 311, these blade 32 roots and body 31 join as spiral inclination, cutting sth. askew along its inlet air peristoma is formed with wind cutting inclined-plane 321, and the outer rim of blade 32 321 descends from the wind cutting inclined-plane, and corresponding pedestal 1 inner edge is adopted curved surface and extended, and keeping a predetermined gap, the lower end trims mutually with the root edge of body 31.

By above-mentioned structure, motor 2 location is fixedly arranged in the motor dish 11 of pedestal 1, simultaneously flabellum 3 is inserted from other side correspondence of pedestal 1, utilize axle 21 suits of the jack-post 311 of its inner face central authorities and motor 2 fixed.When motor 2 turns and drives flabellum 3 rotations, consult Fig. 5, the air-flow of its screw-in prolongs the concentrated also quilt of solid surface of body 31 and is incited out, and because of the inlet air peristoma of this blade 32 is formed with tangent plane inclined-

plane

321 and 321 declines from the wind cutting inclined-plane of its outer rim, pedestal 1 inner edge is adopted curved surface to extend, can reduce the choke and the flow-disturbing at flabellum 3 back sides, add its wind cutting inclined-plane 321 can smaller angle with to introduce air-flow tangent, tool has the wind incisal guide of low noise and draws usefulness, obtain maximum screw-in air quantity by its blade 32, and, reach best air draught and air-supply effect its effectively concentrated inciting out, provide heat gun 4 to set use, as shown in Figure 6.

The mode that the setting of this wind deflector 1 and blade 32 are inverse surface is located on pedestal 1 inner face periphery, when flabellum 3 screws in air-flow, makes this wind deflector 12 further guide the formation eddy current with this air-flow, with the air draught ability of increase flabellum 3, and sends fast.

In sum, the utility model is concluded and is had the effect of following enhancement:

1, because the flabellum body is sphere shape, when flabellum rotated the air-guiding screw-in, this air-flow prolonged it The periphery guiding of body enters, and the flow-disturbing that can effectively reduce its windage and the flabellum back side produces.

2, because the flabellum body is sphere shape, its periphery provides the area that arranges of blade maximum, works as flabellum During rotation, can obtain maximum screw-in air quantity, and it is incited out fast.

3, the utlity model has low windage, back pressure was little when flabellum was rotated, and it is fast to add this blade tool Speed is effectively incited out effect, can prevent the resonance of air-flow and pedestal, and then noise is significantly reduced.

Claims

1, a kind of blower fan of improvement, by pedestal, motor and flabellum are formed, these pedestal central authorities form the motor dish, the periphery ring of this motor dish is provided with some wind deflectors, this motor is gone into the location from a side of pedestal and is located in this motor dish, it is characterized in that: this flabellum is made of body and blade, this blade equidistantly is located at the periphery that is sphere shape body, the inner face central authorities one of this body has jack-post, and this root of blade and body join as spiral inclination, and cutting sth. askew along its inlet air peristoma is formed with the wind cutting inclined-plane, the outer rim of this blade descends from the wind cutting inclined-plane, extend should the pedestal inner edge adopting curved surface, and keep a predetermined gap, the lower end trims mutually with the root edge of body.

2, the blower fan of improvement as claimed in claim 1 is characterized in that: this body is spherical surface body or ellipsoid body.

3, the blower fan of improvement as claimed in claim 1 is characterized in that: the mode that this wind deflector and blade are inverse surface is located on pedestal inner face periphery.