CN2543204Y

CN2543204Y - Cooling fan

Info

Publication number: CN2543204Y
Application number: CN 02236024
Authority: CN
Inventors: 黄文喜; 林国正; 林振章
Original assignee: Delta Electronics Inc
Current assignee: Taida Electronic Industry Co Ltd; Delta Electronics Inc
Priority date: 2002-05-22
Filing date: 2002-05-22
Publication date: 2003-04-02
Anticipated expiration: 2012-05-22

Abstract

The utility model discloses a heat dissipating fan for generating main air flow to dissipate heat of external heat sources, and for generating auxiliary air flow to dissipate heat resulted from its own operation. The utility model comprises an auxiliary fan fitted on a rotation shaft of a main fan, wherein the auxiliary fan rotates along with the main fan to generate auxiliary air flow, and the auxiliary air flow can guide heat resulted from operation of the fun itself to outside, so as to lower working temperature of the fan itself and further prolong service life of the heat dissipating fan.

Description

Radiator fan

Technical field

The utility model relates to a kind of radiator fan, is applied to have in the equipment of thermal source, and such as electronic equipments such as computers, being meant especially can also provide the radiator fan of the radiating airflow of the working temperature of reduction own except that the air-flow that external heat radiation is provided.

Background technology

Heat dissipation problem is the problem that many electronic equipments institute desire solves always, such as personal computer, mobile computer or the like, overheated environment will be related to the stability of electronic device works, and the machine of working as of many unknown causes all is to cause because heat dissipation problem can't solve institute.

For instance, in computer system, have a central processing unit (CPU) on the motherboard, be responsible for the computing work of data; CPU rises cpu temperature in the time of can producing heat energy when carrying out computing work, if the temperature of CPU rises to a too high temperature, will make the work of CPU become unstable and even cause the phenomenon of computer down, CPU is the main thermal source of computer system, for reducing the working temperature of CPU, usually on CPU, can install a metal heat sink additional, on metal heat sink, install a radiator fan again, the working temperature of CPU is passed on the metal heat sink, brushes metal heat sink by radiator fan generation air-flow again and dispel the heat; In recent years, demand for the high rate data processing, impel CPU constantly progressive on making and designing, function and speed are also become stronger day by day, at the same time, the also relative raising with operating frequency of the operating voltage of CPU makes the working temperature of CPU significantly promote, and, also require to improve the running efficiency of radiator fan relatively in order to satisfy certain radiating requirements.

As shown in Figure 1, known radiator fan 60 comprises a rotor 61 and a stator 62, and this stator 62 is socketed on outside radiator fan fan frame 63 bottom brackets 631, and this rotor 61 has a rotating shaft 611 and multi-disc blade 612, produce air-flow by blade 612, in order to brush thermal source.Can be provided with bearing 64 in bearing pedestal 631 is nested with for rotating shaft 611.As previously mentioned, when radiator fan promotes running efficiency along with the radiating requirements of thermal source, also raising thereupon of the working temperature of radiator fan (being subjected to excitatory and the heat energy that rotor rotation is produced of stator as the permanent magnet of energising in the aft-fan, the heat energy that is produced as bearing and rotating shaft friction) itself; Yet under the environment of high temperature, can reduce the useful life of radiator fan,, when the temperature of bearing is too high, make easily damage of bearings, and to produce noise once damage of bearings promptly can influence the running of fan especially with bearing.

Though radiator fan is used for distributing extraneous thermal source, yet under the requirement of high running efficiency, radiator fan itself also can produce higher working temperature, and the working temperature that radiator fan itself is produced, but can influence the useful life of radiator fan, under the situation that the performance of electronic equipment promotes gradually, this problem will be serious day by day.

Summary of the invention

Main purpose of the present utility model is to provide a kind of radiator fan with self-heat sinking function.

To achieve these goals, the utility model provides a kind of radiator fan, includes a framework and a main fan, and described framework has a bearing pedestal, and this bearing pedestal has an axis hole that runs through, and in this axis hole ccontaining more than one bearing; Described main fan includes a wheel hub, a plurality of blade and that is located on this wheel hub periphery is placed on the rotating shaft in the described bearing, wherein, described radiator fan also includes a secondary fan, it has a plurality of blades, this pair fan is placed in the rotating shaft of this main fan and is arranged in this axis hole, and along with this rotating shaft is rotated in the lump, this shaft hole inner wall mask has a plurality of short slots, offers a plurality of air vent holes on this main fan.

Aforesaid a kind of radiator fan, wherein, the air vent hole of described main fan is arranged on the wheel hub of main fan.

Aforesaid a kind of radiator fan, wherein, described main fan also comprises an iron-clad, and described wheel hub is set in outside this iron-clad, and described air vent hole is arranged on this iron-clad, and iron-clad and wheel hub have the space.

Aforesaid a kind of radiator fan, wherein, this air vent hole and this short slot constitute a gas flow path.

Aforesaid a kind of radiator fan, wherein, this air vent hole, this space and this short slot constitute a gas flow path.

Aforesaid a kind of radiator fan wherein, also includes an electromagnet, is sheathed on this bearing pedestal and with a circuit board to electrically connect, and this electromagnet has a plurality of magnetic poles.

Aforesaid a kind of radiator fan wherein, has a plurality of louvres on this circuit board.

Aforesaid a kind of radiator fan, wherein, this wheel hub top surface has a plurality of ribs, and described rib forms described space between this wheel hub and this iron-clad.

The beneficial effects of the utility model are, when electromagnet during by electric current, electromagnet can produce magnetic field and with the main fan mutual exclusion, make main fan be rotated motion and produce primary air, utilize primary air to come thermal source to external world to dispel the heat; In addition owing to secondary fan is installed in the inside that the main fan rotating shaft is positioned at radiator fan, secondary fan can produce secondary streams along with main fan rotates in the lump, the heat energy that secondary streams can be guided radiator fan running itself outwards sheds, to reduce the working temperature of radiator fan itself.

For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with some embodiment, and conjunction with figs., be described in further detail.

Description of drawings

Fig. 1 is existing radiator fan organigram;

Fig. 2 is a constructing stereo decomposing schematic representation of the present utility model;

Fig. 3 A, Fig. 3 B are structure section schematic diagrames of the present utility model;

Fig. 4 A is the D structure figure of another main fan;

Fig. 4 B, Fig. 4 C are another enforcement illustrations that the utility model utilizes Fig. 4 A main fan;

Fig. 5 A utilizes the of the present utility model the 3rd of Fig. 5 B bearing pedestal to implement illustration;

Fig. 5 B is another execution mode of the utility model bearing pedestal.

Embodiment

Shown in Fig. 2, Fig. 3 A, the disclosed radiator fan of the utility model includes an electromagnet 10, a main fan 20, one secondary fan 30, a circuit board 40 and a framework 50.

Framework 50 is in order to ccontaining electromagnet 10 and main fan 20, and supply screw (not shown) or other engagement means to be installed on the position of desire heat radiation, its middle frame 50 bottom center positions are extended with a bearing pedestal 51, can sheathed in regular turn circuit board 40 and electromagnet 10 on bearing pedestal 51; Bearing pedestal 51 has an axis hole that runs through 511, is provided with at least one bearing 14 in axis hole 511, has a plurality of short slots 512 on its central axis hole 511 inner peripheral surfaces, even in the feasible bearing 14 sheathed axis holes 511, air-flow still can be flowed into or outflow by short slot 512.

Electromagnet 10 is sheathed on the bearing pedestal 51 of framework 50, and constitute electric connection with the circuit board 40 that is nested with equally on bearing pedestal 51, electromagnet 10 have a plurality of magnetic poles 12 (magnetic pole consist of technique known, so no longer giving unnecessary details) more, when electric current passes through magnetic pole 12, magnetic pole 12 can produce magnetic field, rotates to impel main fan 20.

Main fan 20 includes a wheel hub 21 and a plurality of blade 22 that is located on wheel hub 21 peripheries, wheel hub 21 is a goblet, 21 central interior places are extended with a rotating shaft 211 in wheel hub, can be placed in the bearing 14 of bearing pedestal 51, when wheel hub 21 its blades 22 of rotation drive rotate in the lump and produce primary air, the main thermal source (as the central processing unit of personal computer) to external world of primary air brushes, with thermal source heat radiation to external world.In addition, on wheel hub 21, offer a plurality of air vent holes 213, pass in and out for air-flow.

Secondary fan 30 is made up of the collar 31 and a plurality of blade 32 that is arranged at the collar 31 peripheries, the collar 31 is placed in the rotating shaft 211 of main fan 20 and is arranged in the axis hole 511 of bearing pedestal 51, secondary fan 30 can rotate together along with rotating shaft 211, when secondary fan 30 rotates, blade 32 in the lump rotation and produce secondary streams, secondary streams mainly causes air-flow in axis hole 511 inside of bearing pedestal 51, being dispelled the heat in radiator fan inside.

Shown in Fig. 3 A, Fig. 3 B, according to the disclosed radiator fan of the utility model, it has a main fan 20 and a secondary fan 30, main fan 20 is in order to produce primary air, dispel the heat with to external world thermal source, secondary fan 30 is in order to producing secondary streams, with to the inner auto-radiating of radiator fan itself; Constitute a gas flow path by the air vent hole 213 of main fan 20 end faces and the short slot 512 of bearing pedestal 51, gas flow path can be introduced the lower air of ambient temperature, and secondary streams can be guided via gas flow path, the heat energy of radiator fan itself is discharged, make radiator fan except that can externally dispelling the heat, the more effective working temperature of reduction itself prolongs useful life of radiator fan.

In first embodiment, also can offer a plurality of louvres 41 on the circuit board 40 in addition, help the heat radiation of radiator fan self.

Shown in Fig. 4 A, another execution mode for main fan in the utility model 20, wherein main fan 20 is by wheel hub 21, iron-clad 23 and a plurality of blades 22 that are located on wheel hub 21 peripheries are formed, this wheel hub 21 has a centre bore, among second embodiment shown in Fig. 4 B and Fig. 4 C, this main fan 20 has a plurality of ribs 215 at the top inner surface periphery, when wheel hub 21 is placed in iron-clad 23 outside, can between wheel hub 21 and iron-clad 23, constitute a space by these a plurality of ribs 215, promptly form another bigger air inlet position, make main fan 20 except introducing the air by a plurality of air vent holes on the iron-clad, also can lead more outside air to enter radiator fan inside, more help the heat radiation of internal work temperature by this space.

Fig. 5 B is depicted as another execution mode of the utility model bearing pedestal 51, offer a plurality of short slots 514 on the adjacent wall surface of ccontaining bearing 14 in its bottom bracket 51, in the 3rd embodiment of this bearing pedestal of use shown in Fig. 5 A, the air in the external world still can flow out via the short slot 514 of bearing pedestal 51 in the time of in bearing 14 is assembled in bearing pedestal 51, constitute a gas flow path by the air vent hole 213 of main fan 20 end faces and the short slot 514 of bearing pedestal 51, gas flow path can be introduced the lower air of ambient temperature, and secondary streams can be guided via gas flow path, the heat energy of radiator fan itself is discharged, to dispel the heat.

The above is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model; All equalizations of being done according to the utility model content change and modify, and all are included in the claim of the present utility model.

Claims

1. a radiator fan includes a framework and a main fan, and described framework has a bearing pedestal, and this bearing pedestal has an axis hole that runs through, and in this axis hole ccontaining more than one bearing; Described main fan includes a wheel hub, a plurality of blade and that is located on this wheel hub periphery is placed on the rotating shaft in the described bearing, it is characterized in that, described radiator fan also includes a secondary fan, it has a plurality of blades, this pair fan is placed in the rotating shaft of this main fan and is arranged in this axis hole, and along with this rotating shaft is rotated in the lump, this shaft hole inner wall mask has a plurality of short slots, offers a plurality of air vent holes on this main fan.

2. a kind of radiator fan as claimed in claim 1 is characterized in that the air vent hole of described main fan is arranged on the wheel hub of main fan.

3. a kind of radiator fan as claimed in claim 1 is characterized in that described main fan also comprises an iron-clad, and described wheel hub is set in outside this iron-clad, and described air vent hole is arranged on this iron-clad, and iron-clad and wheel hub have the space.

4. a kind of radiator fan as claimed in claim 2 is characterized in that, this air vent hole and this short slot constitute a gas flow path.

5. a kind of radiator fan as claimed in claim 3 is characterized in that, this air vent hole, this space and this short slot constitute a gas flow path.

6. as claim 1,2 or 3 described a kind of radiator fans, it is characterized in that, also include an electromagnet, be sheathed on this bearing pedestal and electrically connect with a circuit board, this electromagnet has a plurality of magnetic poles.

7. a kind of radiator fan as claimed in claim 6 is characterized in that, has a plurality of louvres on this circuit board.

8. a kind of radiator fan as claimed in claim 3 is characterized in that, this wheel hub top surface has a plurality of ribs, and described rib forms described space between this wheel hub and this iron-clad.