CN213331591U

CN213331591U - Heat radiation fan

Info

Publication number: CN213331591U
Application number: CN202021416704.4U
Authority: CN
Inventors: 康培; 朱坤; 张艳彬
Original assignee: Taicang Xinhuaying Electronic Co Ltd
Current assignee: Taicang Xinhuaying Electronic Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-06-01
Anticipated expiration: 2030-07-17

Abstract

The utility model discloses a cooling fan, include: the fan frame comprises a bottom plate and a middle pipe embedded on the bottom plate; the fan wheel comprises a hub and a rotating shaft, one end of the rotating shaft is arranged on the hub, the other end of the rotating shaft is rotatably connected with the middle pipe, and a gasket is arranged between the rotating shaft and the middle pipe; wherein, in the direction of perpendicular to the bottom plate, have first maximum vertical height between the bottom of gasket and well pipe, have second maximum vertical height between wheel hub and the bottom plate, the ratio of first maximum vertical height and second maximum vertical height is 0.05-0.4. The utility model has the advantages that: the ratio of the first maximum vertical height between the bottom of the rotating shaft and the bottom of the middle pipe to the second maximum vertical height between the hub and the bottom plate is limited in a certain range, so that the development efficiency is improved, the stability of the cooling fan is better, and the service life is longer.

Description

Heat radiation fan

Technical Field

The utility model belongs to the technical field of radiator fan, concretely relates to miniature radiator fan suitable for among small-size electronic product.

Background

Because electronic components in the electronic product can generate heat during operation, the electronic product is basically provided with a cooling fan, airflow is forced to flow by utilizing the wind dispelling effect of the cooling fan, so that the heat in the electronic product is discharged, and the influence of overhigh temperature on the normal operation of the electronic product and even the burning of circuit devices by the circuit components in the electronic product are avoided.

Along with the development trend of light weight, thinness and high performance of electronic products, the heat productivity of electronic elements of the electronic products is gradually increased, in order to avoid the influence of overhigh heat on the use experience of the products, the heat dissipation requirement of using an ultrathin fan is also increased, but the early development is basically carried out by virtue of the experience of designers and trial and error methods, namely, the size proportion of components of the heat dissipation fan is not regular, the development cost is greatly increased, the development efficiency is also influenced, if poor design is forcibly produced in mass production under the pressure of time on the market, the manufacturing process is poor and higher, and the cost is wasted. Generally speaking, if the ratio of the distance between the bottom of the rotating shaft and the bottom of the middle pipe to the distance between the hub and the bottom plate is too small, the bottom of the middle pipe is too thin and is easy to deform, so that the reliability is high, and if the ratio is too large, the stability is poor due to too short bearings and the rotating shaft.

Therefore, in order to solve the above-mentioned problems, it is necessary to provide a heat dissipation fan with a better dimensional ratio of its internal components so that the fan can operate stably.

Disclosure of Invention

An object of the utility model is to provide a radiator fan to radiator fan's among the solution prior art problem.

In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:

in one embodiment, the present application provides a heat dissipation fan, including: the fan frame comprises a bottom plate and a middle pipe embedded on the bottom plate;

the fan wheel comprises a hub and a rotating shaft, one end of the rotating shaft is arranged on the hub, and the other end of the rotating shaft is rotatably connected with the middle pipe;

in the direction perpendicular to the bottom plate, a first maximum vertical height is formed between the gasket and the bottom of the middle pipe, a second maximum vertical height is formed between the hub and the bottom plate, and the ratio of the first maximum vertical height to the second maximum vertical height is 0.05-0.4.

Optionally, the ratio is 0.15-0.4.

Optionally, the difference between the second maximum vertical height and the first axial height is the vertical height of the rotating shaft.

Optionally, the middle pipe comprises a side wall and a bottom embedded on the bottom plate, and the gasket is attached to the inner surface of the bottom of the middle pipe.

Optionally, a step is formed on the side wall of the middle pipe, a blocking piece is arranged on the step, and a bearing is arranged on the blocking piece.

Optionally, the inner diameter of the baffle is smaller than the diameter of the bearing.

Optionally, a groove is formed in one end, close to the gasket, of the rotating shaft, and when the rotating shaft is matched in the middle tube, the blocking piece is clamped in the groove.

Optionally, a gasket is further arranged between the bottom of the rotating shaft and the bottom of the middle pipe.

Optionally, one end of the rotating shaft close to the gasket is spherical.

Optionally, the rotating shaft is connected to a central position of the radial extension part of the hub.

Compared with the prior art, the utility model discloses a prescribe a limit to in the certain limit with the ratio of the first maximum vertical height between the bottom of pivot bottom and well pipe and the maximum vertical height of second between wheel hub and the bottom plate, improved development efficiency to make radiator fan's stability better, life is longer.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a partial cross-sectional view of a heat dissipation fan according to an embodiment of the present application;

fig. 2 is a partially enlarged view of fig. 1 in an embodiment of the present application.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. The embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to the embodiments are included in the scope of the present invention.

Referring to fig. 1, the present invention provides a heat dissipation fan, including: the fan comprises a fan frame 1 and a fan wheel 2 arranged in the fan frame 1; the fan frame 1 includes a bottom plate 11 and a middle pipe 12 disposed on the bottom plate 11, and the fan wheel 2 includes a hub 21 and a rotating shaft 22 disposed on the hub 21.

The fan frame 1 includes a bottom plate 11, a side wall 13, and a cover plate 14. The bottom plate 11 and the side wall 13, the side wall 13 and the cover plate 14 are connected to each other to form an accommodating chamber, and the accommodating chamber can accommodate other components of the cooling fan. The bottom plate 11 is formed with a notch through which the middle tube 12 is fitted to the bottom plate 11.

The middle tube 12 includes a bottom portion 122 and a side wall 123 embedded in the bottom plate 11, the bottom portion 122 includes an inner surface and an outer surface opposite to each other, and specifically, the middle tube 12 is made of copper. The heat dissipation fan may further include a gasket 15, the gasket 15 is attached to the inner surface of the bottom portion 122, the gasket 15 has a good wear-resisting property, and the PU material may be selected for specific applications. In one embodiment, the sidewall 123 of the middle tube 12 can be provided with a step, the step is provided with a baffle 124, the baffle 124 is provided with a bearing 125, wherein the inner diameter of the baffle 124 is smaller than the diameter of the bearing 125.

The impeller 2 is disposed in the accommodating chamber, and includes a hub 21 and a rotating shaft 22, wherein one end of the rotating shaft 22 is fixed to the hub 21, the hub 21 includes an extending portion along a horizontal direction, and preferably, the rotating shaft 22 is disposed at a central position of the extending portion along the horizontal direction of the hub 21. The inner surface of the hub 21 is provided with magnetic elements.

The other end of the shaft 22 is rotatably disposed in the bearing 125, and preferably, a groove is formed at one end of the shaft 22 close to the gasket 15, and when the shaft 22 is fitted into the middle tube 12, the blocking piece 124 is caught in the groove, so that the shaft 22 can be more stably rotated. The contact area of the rotating shaft 22 and the gasket 15 is smaller than the cross-sectional area of the rotating shaft 22, so that the friction between the rotating shaft 22 and the gasket 15 during rotation can be reduced, and the rotation speed can be increased.

In the direction perpendicular to the bottom plate 11, a first maximum vertical height a is provided between the bottom of the rotating shaft 22 and the bottom 122 of the middle tube 12, a second maximum vertical height B is provided between the hub 21 and the bottom plate 11, and the ratio of the first maximum vertical height a to the second maximum vertical height B is 0.05-0.4. The first maximum vertical height a is a distance between the bottom of the rotating shaft 22 and the lower surface of the middle pipe bottom 122, and the second maximum vertical height B is a distance between the upper surface of the hub 21 and the lower surface of the bottom plate 11. Preferably, the ratio is 0.15 to 0.4. The difference between the second maximum vertical height B and the first axial height a is the vertical height of the shaft 22. It should be understood that when the above ratio is small, the bottom 122 of the middle tube 12 is thin and has small strength, and when the above ratio is large, the height of the rotating shaft 22 is small, and the rotating shaft is easy to swing during rotation, and has poor stability.

The heat radiation fan also comprises a circuit board arranged on the outer periphery of the middle pipe and a stator arranged on the circuit board. An inductive air gap is arranged between the stator and the magnetic element. The stator includes magnetic conduction piece group, insulating cover group and coil assembly, and magnetic conduction piece group can include a plurality of magnetic conduction pieces, and these a plurality of magnetic conduction pieces stack the setting in the vertical direction, and wherein, magnetic conduction piece can be the silicon steel sheet. The insulating sleeve set is arranged at two end parts of the magnetic conducting sheet set in the vertical direction, and the coil set is wound and combined with the magnetic conducting sheet set and the insulating sleeve set. The coil assembly is connected with the circuit board.

The utility model discloses a ratio of the first maximum vertical height between the bottom of pivot bottom and well pipe and the second maximum vertical height between wheel hub and the bottom plate is injectd in the certain limit, has improved development efficiency to make radiator fan's stability better, life is longer.

The following is a table comparing the strength of the middle tube bottom 122 and the stability of the rotation of the rotary shaft 22 when the ratio of the first maximum vertical height to the second maximum vertical height, i.e., a/B, is different in each of the examples.

As can be seen from the data in the above table, when the ratio of the first maximum vertical height to the second maximum vertical height, i.e., the a/B value, is less than 0.1, the strength of the middle tube bottom 122 is weak, and when the a/B value is greater than 0.6, the stability of the rotation of the rotating shaft 22 is poor. That is, when the value of a/B is 0.05 to 0.4, the strength of the middle tube bottom 122 and the stability of the rotation of the rotary shaft 22 can be in a good state. Especially when the value of A/B is 0.15-0.4, the heat radiation fan is in the best working state.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A heat dissipating fan, comprising:

the fan frame comprises a bottom plate and a middle pipe embedded on the bottom plate;

in the direction perpendicular to the bottom plate, a first maximum vertical height is formed between the bottom of the rotating shaft and the bottom of the middle pipe, a second maximum vertical height is formed between the hub and the bottom plate, the ratio of the first maximum vertical height to the second maximum vertical height is 0.05-0.4, and a gasket is further arranged between the bottom of the rotating shaft and the bottom of the middle pipe.

2. The heat dissipating fan of claim 1, wherein the ratio is 0.15-0.4.

3. The heat dissipating fan of claim 1, wherein the difference between the second maximum vertical height and the first axial height is the vertical height of the rotating shaft.

4. The heat dissipating fan as claimed in claim 1, wherein the middle tube includes a bottom portion embedded in the bottom plate and a sidewall, and the gasket is attached to an inner surface of the bottom portion of the middle tube.

5. The heat dissipating fan as claimed in claim 4, wherein the side wall of the middle tube is formed with a step, the step is provided with a stopper, and the stopper is provided with a bearing.

6. The heat dissipating fan of claim 5, wherein the inner diameter of the baffle is smaller than the diameter of the bearing.

7. The heat dissipating fan of claim 5, wherein a groove is formed at an end of the shaft adjacent to the spacer, and the blocking piece is engaged in the groove when the shaft is fitted in the middle tube.

8. The heat dissipating fan as claimed in claim 1, wherein an end of the shaft adjacent to the spacer is spherical.

9. The heat dissipating fan as claimed in claim 1, wherein the shaft is connected to a central position of the horizontally extending portion of the hub.