CN1880778B

CN1880778B - Centrifugal fan and its fan frame

Info

Publication number: CN1880778B
Application number: CN200510079028XA
Authority: CN
Inventors: 吴俊男; 徐国栋; 黄文喜
Original assignee: Delta Optoelectronics Inc
Current assignee: Delta Electronics Inc; Delta Optoelectronics Inc
Priority date: 2005-06-14
Filing date: 2005-06-14
Publication date: 2011-08-10
Anticipated expiration: 2025-06-14
Also published as: EP1734257B1; EP1734257A1; CN1880778A

Abstract

The invention relates to an eccentric fan, whose frame comprises an axial wind inlet and a side wind outlet, the first block wall axially extending along the circumference of wind inlet for avoiding foreign matter into the wind inlet; and the second block wall axially extending along the part circumference of said wind outlet, as one divert baffle plate to contact one system to reduce the air reflux.

Description

Centrifugal fan and fan frame thereof

[technical field]

The present invention system is about a kind of centrifugal fan and fan frame thereof, and special system enters fan inside and can cooperate a system to reduce the centrifugal fan and the fan frame thereof of airflow reflux about a kind of foreign matter or liquid of stopping.

[prior art]

General known centrifugal fan as shown in Figure 1, it comprises among a fan frame 10, the motor figure and not showing and an impeller 30.Wherein this fan frame 10 has an intake grill 11 and an exhaust outlet (not shown).This motor system is arranged in this fan frame 10, in order to rotate this impeller 30.This impeller 30 more comprises a wheel hub 31, a base plate 32 and a plurality of blade 33 that is formed on this base plate 32.Its radiating principle system will turn to from the axial flow that intake grill 11 enters into along this wheel hub 31 radially away from behind the air-flow, discharge from this exhaust outlet.

See also Fig. 2 A and 2B, it shows known centrifugal fan is used in situation in the system 4, but framework inside holding electronic element (not shown) and this centrifugal fan of this system 4, and design a wind inlet 41 in a side of this framework; Shown in 2B figure, the radiating mode of this system 4 system is by the running of this centrifugal fan, makes ambient air pass the wind inlet 41 of this system 4 and enters centrifugal fan, discharges from the exhaust outlet of this centrifugal fan and blows to internal system.Yet this kind radiating mode has its shortcoming, and promptly the air-flow of being discharged by the exhaust outlet of centrifugal fan can produce the phenomenon of backflow, and reduces radiating effect.

Take place for reducing the airflow reflux phenomenon, the design of another kind of system is also arranged, as shown in Figure 3, set up a diaphragm 42 in system framework inside, this is led system dividing plate 42 preferable systems and closely contacts with centrifugal cutter, then can reduce the phenomenon that produces airflow reflux.

Yet, as shown in Figure 3, this diaphragm 42 is reached the linear contact of this kind with the system that contacts of centrifugal fan with a deflection angle of centrifugal fan housing by a surface of this diaphragm, be easy to promptly cause when mounted the situation of not contact to take place, and produced the phenomenon of airflow reflux.

In addition, because the wind inlet 41 of this system is a complete and extraneous through hole that connects, when system temporarily is in the environment of non-cleaning, extraneous foreign matter, for example dust, or water droplet might enter internal system by this wind inlet, and then in the inflow centrifugal fan, cause this fan to damage.

Therefore, how to reduce the phenomenon of airflow reflux in the system and increase the fan radiating efficiency, and can prevent purpose and the emphasis that a small amount of extraneous foreign matter enters fan easily and causes the problem of damage to develop for the present invention.

[summary of the invention]

Main purpose of the present invention ties up in a kind of centrifugal fan fan frame is provided, intake grill one side of this fan frame has one first barricade, this first barricade system axially outwards forms along the outer rim of this intake grill, when making this centrifugal fan be used in the system, can prevent that the intrusion of foreign matter or liquid from flowing into accidentally.

Another object of the present invention ties up in a kind of centrifugal fan fan frame is provided, one place of the exhaust outlet periphery of this fan frame forms axial outward extending second barricade, this second barricade system is used for tightr contact one system, can prevent that air-flow from producing backflow, make radiating effect better, and make that the rigidity of this fan frame is stronger.

For achieving the above object, the invention provides a kind of centrifugal fan, it comprises a hollow fan frame, a motor and an impeller, this motor and impeller system are positioned at the inside of this fan frame.This fan frame system is combined by a loam cake and a bottom; Wherein form one along axial outward extending first barricade of this intake grill periphery, the axial height of this first barricade, circumferencial direction length and where to form in this intake grill periphery then be to decide on the situation of being used in intake grill one side of this loam cake; Exhaust outlet periphery design in this loam cake forms axial outward extending second barricade, and the height of this second barricade also is to decide on institute's practice situation.

System will fan the wind inlet place of first barricade of frame towards this system's framework when cooperating a system to use, and will be available preventing foreign matter, enter this fan inside as the apparatus of dust, child's use or liquid etc., and cause the fan damage.In addition, but the shape and the position of the diaphragm of this second barricade coupled system are designed to closely be contacted with easily the aspect of this diaphragm.

For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:

[description of drawings]

Fig. 1 is a known centrifugal fan stereogram.

Fig. 2 A～2B be respectively known centrifugal fan apply to a system on look and schematic side view.

Fig. 3 is that known centrifugal fan applies to another kind of system schematic.

Fig. 4 A is embodiment's stereogram of centrifugal fan of the present invention.

Fig. 4 B is the side view of Fig. 4 A air-out oral-lateral.

Fig. 5 is the side-looking exploded view of Fig. 4 A.

Fig. 6 A～6C be respectively centrifugal fan of the present invention apply to a system on look, the schematic representation of different amount side-looking.

Fig. 7 A～7B is respectively the schematic representation that first barricade of the present invention is formed at diverse location.

Fig. 8 is that centrifugal fan of the present invention applies to another kind of system schematic.

Fig. 9 A～9D is the differently contoured schematic representation of the second barricade top end of the present invention.

[embodiment]

See also Fig. 4 A, 4B and Fig. 5, centrifugal fan of the present invention comprises that hollow fan frame 50, an impeller 60 and are in order to drive the motor (not shown) that this impeller 60 rotates; This motor and impeller 60 are the inside that is positioned at this fan frame 50.

This fan frame 50 is to be combined by a loam cake 501 and a bottom 502, and this fan frame 50 has the exhaust outlet 504 that an intake grill of axially offering 503 and a side direction are offered.In more detail, this intake grill 503 is a through hole that axially runs through this loam cake 501, combines with the corresponding periphery of this bottom 502 and this exhaust outlet 504 is a periphery by this loam cake 501.Axially form a plurality of U font clasps 5011 downwards in these loam cake 501 peripheries, respectively can be in order to be combined into this fan frame 50 with a plurality of protuberances 5021 mutual buckles that form these bottom 502 sidewalls.In present embodiment, the similar English alphabet of these fan frame 50 appearance profiles " D ", that is the size offered of these exhaust outlet 504 side direction is an aspect that extends out with respect to the periphery system of its opposite side, this profile design department cooperates air to design in the situation of these fan frame 50 internal flows, make the airspeed and the flow homogenization of discharging from this exhaust outlet 504, the larger area thermal source that can dispel the heat, and can save if be designed to the space that square fan frame is additionally occupied.

In addition, axially extend upward in the part periphery of the intake grill 503 of this loam cake 501 and to form one first barricade 505, the axial height of this first barricade 505, arc length and decide on the situation of being used in where forming then of these intake grill 503 peripheries.What deserves to be mentioned is this first barricade 505 not necessarily form along the periphery of this intake grill 503 just, its circular arc curvature also not necessarily must be identical with the periphery of this intake grill 503, even must axially not form vertically upward; Can there be a segment distance formation position of this first barricade 505 with this intake grill 503, and circular arc curvature can be big or little than the periphery curvature of this intake grill 503, even can be inclined upwardly at any angle and extend to form.

In addition, equally axially extend upward in the periphery of this exhaust outlet 504 of formation of this loam cake 502 and to form one second barricade 506, the axial height of this second barricade 506 also is to decide on institute's practice situation.In this enforcement, for reducing the volume that this fan frame 50 occupies, this intake grill 503 can design comparatively closely with this exhaust outlet 504, make in these loam cake 502 structures intervenient part can become comparatively crisp and fall, and the design of this second barricade 506 just can increase the rigidity of this part.What deserves to be mentioned is that this intake grill 503 is a straight line aspect near the periphery system of these exhaust outlet 504 1 sides and hides the partial blade of the impeller 60 below it, can reduce the situation in this place's air-flow adverse current.

See also Fig. 6 A～6C, it shows centrifugal fan of the present invention is used in situation in the system 4, but does not show and this centrifugal fan in the framework inside holding electronic part drawing of this system 4, and designs a wind inlet 41 in a side of this framework; The radiating mode of this system 4 system is by the running from this centrifugal fan, makes ambient air pass the wind inlet 41 of this system 4 and enters centrifugal fan, discharges from the exhaust outlet of this centrifugal fan and blows to system 4 inside.When cooperating this system 4 to use centrifugal fan of the present invention, system will fan the wind inlet 41 of first barricade 505 of frame 50 towards these system's 4 frameworks, available preventing foreign matter, apparatus that uses as dust, child or liquid etc. enter this fan inside, and cause fan to damage.This first barricade, 505 main purposes system invades in this centrifugal fan in order to stop the foreign matter that enters from the wind inlet 41 of this system 4, so this first barricade even can a plane aspect be formed on this fan frame table face and reach this purpose.So, present embodiment first barricade, 505 aspects of lifting and form the position and can more efficiently stop foreign matter to enter this centrifugal fan and do not influence flowing of air.Because various possible factors, the wind inlet 41 of this system 4 may design the not ipsilateral in the framework of this system 4, and first barricade 505 of centrifugal fan of the present invention also can with design in diverse location, shown in Fig. 7 A and 7B.

See also Fig. 8, it shows that centrifugal fan of the present invention is used in the situation in the another kind of system, a diaphragm 42 is set up in 4 framework inside of this system, and when this centrifugal fan is installed in this internal system 4, system makes second barricade 506 of this fan frame 50 be contacted with this diaphragm 42 closely, so the generation of airflow reflux phenomenon can be reduced, and radiating effect can be increased.For cooperating the different designs of this diaphragm 42, the angle of Qing Xieing for example, this second barricade 506 also can be designed to different aspects, as Fig. 9 A～9D, appearance profiles such as plane, arc surface, plane of inclination can be designed to, to reach the effect that optimum tight contacts this diaphragm 42 at the top end of this second barricade 506.

Comprehensive the above, centrifugal fan provided by the present invention can utilize first barricade to prevent that extraneous foreign matter from entering this fan inside, can utilize second barricade closely to contact again, can prevent airflow reflux and increase radiating effect, solve the intrinsic disappearance of known techniques effectively with the diaphragm of system.

Though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.

Claims

1. a centrifugal fan is fanned frame, be disposed in the system, this system comprises a framework, this centrifugal fan fan frame includes an intake grill and an exhaust outlet, this intake grill one side at this fan frame forms an outward extending barricade, this barricade enters this intake grill towards the wind inlet of this system in order to prevent foreign matter.

2. a centrifugal fan is placed in the system, and this system comprises a framework, and this centrifugal fan comprises:

One fan frame includes an intake grill and an exhaust outlet, forms an outward extending barricade in this intake grill one side of this fan frame, and this barricade enters this intake grill towards the wind inlet of this framework of this system in order to prevent foreign matter;

One impeller, it is to be placed in this fan frame inside; And

One motor, it is to be placed in this fan frame inside, and in order to drive this wheel rotation.

3. centrifugal fan according to claim 2 is characterized in that, this fan frame system is by a loam cake and a bottom person of combining; This loam cake periphery has a plurality of first buckling parts; This bottom sidewall has a plurality of second buckling parts can be respectively and the mutual buckle combination of this first buckling part.

4. centrifugal fan according to claim 3 is characterized in that, these a plurality of first buckling parts are for being " U " clasp of font, this second buckling part is a protuberance.

5. centrifugal fan according to claim 2 is characterized in that, the part periphery system near this exhaust outlet one side of this intake grill is a straight line aspect.

6. centrifugal fan according to claim 2 is characterized in that, the size of offering of this exhaust outlet is an aspect that extends out with respect to the periphery of its opposite side system.

7. centrifugal fan according to claim 2 is characterized in that, has outward extending another barricade at the part periphery of this exhaust outlet.

8. centrifugal fan according to claim 7 is characterized in that this system comprises a diaphragm, and this diaphragm system is placed in this framework and contacts with this another barricade that forms that stretches out of this centrifugal fan outlet port periphery certainly.