CN212643164U - Fan blade and cooling fan - Google Patents

Abstract

The utility model discloses a flabellum and radiator fan, this flabellum, include: a motor housing; and the blade assembly is combined on the motor shell and comprises a main blade and an auxiliary blade, wherein the main blade is at least partially lower than the auxiliary blade, and the length of the auxiliary blade in the radial direction of the motor shell is smaller than that of the main blade. The utility model discloses set up a set of bladelett near the air intake position, when reducing wind and making an uproar, can also further increase the amount of wind.

Description

Fan blade and cooling fan

Technical Field

The utility model belongs to the technical field of the electron product heat dissipation, concretely relates to flabellum and radiator fan.

Background

In recent years, with the trend of light weight and high performance of electronic products, when the electronic products are operated, the heating temperature of the electronic components is increased, and the heat dissipation space is limited, so that the electronic components are not easy to dissipate heat, and thus the situation of unstable performance is easily generated, the reliability of the electronic products is affected, and the functional characteristics are reduced, and the electronic products cannot be brought into operation, so that heat dissipation is one of the important issues to be considered in the design of the electronic products at present.

The most commonly used method for increasing the heat dissipation efficiency is to install a heat dissipation fan in the electronic product, and force the airflow to flow by means of the wind expelling effect of the heat dissipation fan, so as to discharge the high temperature gas inside the electronic product.

Among the prior art, radiator fan generally includes casing and flabellum, is formed with air intake and air outlet on the casing, and the flabellum rotates and sets up in the casing for discharge from the air outlet with the hot-blast air current that comes from the air intake, the flabellum includes motor shell and along a plurality of blades of motor shell all around external radiation, this kind of structure is little near the air current of air intake department position, and the noise that produces is great.

How to provide a cooling fan with low noise is a problem which needs to be solved urgently.

Disclosure of Invention

An embodiment of the utility model provides a flabellum and radiator fan for solve the big problem of noise among the prior art, include:

in one embodiment, a fan blade includes:

a motor housing; and

the blade assembly is combined on the motor shell and comprises a main blade and an auxiliary blade, wherein the main blade is at least partially lower than the auxiliary blade, and the length of the auxiliary blade in the radial direction of the motor shell is smaller than that of the main blade.

Preferably, in the above-mentioned fan blade, each of the auxiliary blades corresponds to one of the main blades.

Further, the angle of the outward radiation of the auxiliary blade is approximately the same as the radiation angle of the corresponding main blade.

Preferably, in the above-mentioned fan blade, the auxiliary blade is disposed adjacent to the motor housing.

Preferably, in the above-mentioned fan blade, a step portion is formed in a circumferential direction of the motor housing, and the auxiliary blade is provided on the step portion.

Further, the motor shell is made of metal, and the step portion is formed at the circumferential vertex angle of the motor shell.

Further, the blade assembly includes a connector having the stepped portion, the connector is coupled to the motor case, and the auxiliary blade and the main blade are coupled to the connector.

Preferably, in the above-mentioned fan blade, the blade assembly is integrally injection-molded on the motor case.

Furthermore, at least one fixing hole is formed in the motor shell, and the blade assembly penetrates through the fixing hole and extends along the surface of the inner wall of the motor shell.

In one embodiment, a heat dissipation fan includes:

the shell forms an installation cavity and is provided with an air inlet and an air outlet which are communicated with the installation cavity;

the fan blade, the auxiliary blade press close to the air inlet.

Compared with the prior art, the utility model discloses set up a set of bladelett being close to the air intake position, when reducing wind and making an uproar, can also further increase the amount of wind.

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 sectional view of a heat dissipating fan in embodiment 1 of the present application;

fig. 2 is a top view of the heat dissipation fan in embodiment 1 of the present application;

FIG. 3 is a schematic perspective view of a fan blade in embodiment 1 of the present application;

FIG. 4 is an enlarged partial schematic view of FIG. 1;

FIG. 5 is a schematic structural diagram of a fan blade in embodiment 2 of the present application;

FIG. 6 is a schematic structural view of a fan blade in embodiment 3 of the present application;

fig. 7 is a schematic structural diagram of a fan blade in embodiment 4 of the present application.

Detailed Description

The present invention will be more fully understood from the following detailed description, which should be read in conjunction with the accompanying drawings. Detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms. Therefore, specific functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed embodiment.

Example 1

Referring to fig. 1, the present embodiment discloses a heat dissipation fan, which includes a housing 10 and fan blades 20 rotatably disposed in the housing 10.

The housing 10 is preferably a metal housing, and the interior of the metal housing forms a mounting cavity 11, the top end of the housing 10 is provided with an air inlet 12 communicated with the mounting cavity 11, and one end of the housing 10 along the horizontal direction is provided with an air outlet 13 communicated with the mounting cavity 11 (see fig. 2).

In an embodiment, the metal shell may be made of conventional iron, aluminum, copper, and alloys thereof, and the present disclosure is not limited thereto.

The fan blade 20 is accommodated in the mounting cavity 11, and rotates to drive the airflow to flow, so that the high-temperature gas from the air inlet (arranged on the heating surface of the electronic product) is discharged through the air outlet, and the purpose of heat dissipation is achieved.

As shown in fig. 2 to 4, the fan blade 20 includes a motor housing 21 and a blade assembly 22 coupled to the motor housing 21.

The middle part of the motor housing 21 is connected with a rotating shaft 31, and the rotating shaft 31 is arranged on a bearing seat 32 in a matching and rotating way. A winding group 33 and a magnetic element 34 which are matched are arranged between the motor shell 21 and the bearing seat 32, and the whole fan blade 20 can be driven to rotate under the condition that the winding group 33 is electrified.

The motor housing 21 is bent downward in the circumferential direction to form an annular stopper arm 211, and the stopper arm 211 encloses a protection space 212 that blocks the winding group 33 and the bearing housing 32.

The motor housing 21 is preferably made of metal, such as steel or other alloy with relatively high rigidity, and the arm 211 can be formed by stamping.

The blade assembly 22 is integrally formed on the motor housing 21 by injection molding using a plastic material, and the blade assembly 22 includes a connecting member 221, an auxiliary blade 222 and a main blade 223.

The connecting member 221 serves as a carrier for the auxiliary blade 222 and the main blade 223, and is sleeved around the motor housing 21 and is in surface contact with the surface of the arm 211 of the motor housing 21. The top corner of the outer edge of the connecting member 221 is concavely provided with an annular step 2211.

The main blades 223 serve as a structure for generating a main air flow, which radiates outward from the circumference of the connection member 221.

The auxiliary blades 222 are small blades, and are distributed on the step portion 2211 in an array manner, and the length of each auxiliary blade does not protrude out of the outer edge of the step portion, and the radial length of each auxiliary blade is obviously smaller than that of the main blade 223 as a whole.

The auxiliary blade 222 is disposed above the height of the main blade 223 and corresponds to the position of the air inlet 12.

In the technical scheme, the inventor finds, through comparison, that compared with the technical scheme without small blades in the prior art, the blades with relatively small sizes are arranged at the positions close to the air inlet 12, so that the noise can be obviously reduced, and meanwhile, the air volume can be improved.

Further, the number of the auxiliary blades 222 and the number of the main blades 223 are the same, and each of the auxiliary blades 222 corresponds to one of the main blades 223 in a radial position, and the angle of the outward radiation of the auxiliary blade 222 is substantially the same as the angle of the radiation of the corresponding main blade 223.

Further, the secondary blade 222 has a smooth lead angle 2221.

In order to improve the bonding strength between the connection member 221 and the motor case 21, the motor case 21 is formed with a plurality of fixing holes 213 in an array near the corners thereof, and the blade assembly 22 passes through the fixing holes 213 and forms a fixing ring 224 on the inner wall surface of the motor case 21 during the injection molding process. Since the fixing ring 224 is coupled to the coupling member 221, the coupling strength between the blade assembly 22 and the motor case 21 can be greatly improved.

In this embodiment, since the connection member 221 may serve as a common carrier for the auxiliary blade 222 and the main blade 223, the auxiliary blade 222 and the main blade 223 may not be directly connected to each other.

Further, the auxiliary vane 222 does not occupy the space above the motor case 21, and its top edge does not protrude out of the top surface of the motor case.

In one embodiment, in order to improve the strength and lifespan of the main blades 233, the plurality of main blades 233 are fixed by a ring-shaped connection ring 225, and the connection ring 225, the connection member 221, the auxiliary blade 222, and the main blade 223 are integrally formed on the motor housing 21.

Example 2

Referring to fig. 5, the present embodiment provides a new fan blade 100, which comprises a motor housing 101 and a blade assembly 102 combined with the motor housing 101, wherein the blade assembly 102 comprises a small-sized auxiliary blade 1021 and a main blade 1022 for generating a main air volume.

Compared with embodiment 1, in this embodiment, the motor housing 101 is bent in the circumferential direction to form a step 1011, the auxiliary blade 1021 is combined on the step 1011, and the main blade 1022 is located at the lower height of the auxiliary blade 1021 and is combined on the bottom end side of the step 1011.

In order to enhance the overall strength of the blade assembly 102, the auxiliary blade 1021 and the main blade 1022 are directly connected in the radial direction and are integrally formed.

In one embodiment, the connecting surface between the auxiliary blade 1021 and the main blade 1022 is a slope 1023.

In this embodiment, the motor housing 101 is preferably made of metal, such as steel or other alloy with relatively high rigidity, and the step portion 1011 is formed by stamping. The blade assembly 102 is made of plastic and is integrally injection-molded and combined on the surface of the motor casing 101.

Example 3

Referring to fig. 6, the present embodiment provides a new fan blade 200, which includes a motor casing 201 and a blade assembly 202 combined to the motor casing 201, wherein the blade assembly 202 includes a small-sized auxiliary blade 2021 and a main blade 2022 generating a main air volume.

Compared to embodiment 2, the auxiliary vane 2021 is a right-angled vane, and includes two parts, namely a first vane 20211 and a second vane 20212, wherein the first vane 20211 is formed on the step part, and the second vane 20212 is located below the step part.

Also, since the connector structure in embodiment 1 is not provided, in order to improve the overall strength of the blade assembly, the first blade 20211, the second blade 20212, and the main blade 2022 are directly connected and integrally formed.

Of course, in other embodiments, the auxiliary blade 2021 and the main blade 2022 may be independent from each other and not directly connected together, even if no connector structure is provided.

In this embodiment, the motor casing 201 is preferably made of metal, such as steel or other alloy with relatively high rigidity, and the step portion is formed by stamping. The blade assembly 202 is made of plastic and is integrally injection-molded and combined on the surface of the motor shell 201.

Example 4

As shown in fig. 7, the present embodiment provides a new fan blade 300, which comprises a motor casing 301 and a blade assembly 302 combined on the motor casing 301, wherein the blade assembly 302 comprises a small-sized auxiliary blade 3021 and a main blade 3022 generating a main air volume.

The auxiliary blade 3021 is located above the main blade 3022, and the auxiliary blade 3021 is located proximate to the air inlet of the fan.

Compared with the motor shell and the blade in embodiments 1 to 3, in this embodiment, the motor shell 301 and the blade assembly 302 are made of the same material, and the motor shell 301 and the blade assembly 302 are integrally formed in one step.

In one embodiment, the motor housing 301 and the blade assembly 302 are made of a metal material, preferably copper or a copper alloy. The material is prepared by using metal powder as raw material and sintering at high temperature in a forming die, wherein the sintering temperature is generally 300-1000 ℃, preferably 500-980 ℃, and the sintering time is generally 10-300 minutes.

In the embodiment, the blades are made of metal materials and have high strength, and a connecting ring structure is not arranged between the blades; meanwhile, as the blade and the motor shell are integrally formed, the bonding strength between the blade and the motor shell is high, and the process manufacturing time is greatly reduced.

The aspects, embodiments, features and examples of the present invention should be considered as illustrative in all respects and not intended to be limiting of the invention, the scope of which is defined only by the claims. Other embodiments, modifications, and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.

The use of headings and sections in this application is not meant to limit the invention; each section may apply to any aspect, embodiment, or feature of the disclosure.

Unless specifically stated otherwise, use of the terms "comprising", "including", "having" or "having" is generally to be understood as open-ended and not limiting.

The use of the singular herein includes the plural (and vice versa) unless specifically stated otherwise. Furthermore, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In addition, where the term "about" is used before a quantity, the present teachings also include the particular quantity itself unless specifically stated otherwise.

It is to be understood that in certain aspects of the invention, a single component may be replaced by multiple components and that multiple components may be replaced by a single component to provide an element or structure or to perform a given function or functions. Except where such substitution would not operate to practice a particular embodiment of the invention, such substitution is considered within the scope of the invention.

While the invention has been described with reference to illustrative embodiments, it will be understood by those skilled in the art that various other changes, omissions and/or additions may be made and substantial equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims. Moreover, unless specifically stated any use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another.

Claims (9)

1. A fan blade, comprising:

a motor housing; and

a blade assembly combined on the motor shell, wherein the blade assembly comprises a main blade and an auxiliary blade, the main blade is at least partially lower than the auxiliary blade, and the length of the auxiliary blade in the radial direction of the motor shell is less than that of the main blade,

a step portion is formed in the circumferential direction of the motor case, and the auxiliary blade is disposed on the step portion.

2. The fan blade according to claim 1, wherein each of said auxiliary blades corresponds to one of said main blades.

3. The fan blade of claim 2, wherein said secondary blades radiate outwardly at an angle substantially the same as the angle of radiation of the corresponding primary blades.

4. The fan blade of claim 1, wherein said secondary blades are disposed proximate said motor housing.

5. The fan blade according to claim 1, wherein the motor housing is made of metal, and the step portion is formed at a circumferential top corner of the motor housing.

6. The fan blade according to claim 1, wherein said blade assembly comprises a connector having said step portion, said connector being coupled to said motor housing, said auxiliary blade and said main blade being coupled to said connector.

7. The fan blade of claim 1, wherein the blade assembly is integrally injection molded to the motor housing.

8. The fan blade as claimed in claim 7, wherein the motor housing defines at least one fixing hole, and the blade assembly is disposed through the fixing hole and extends along an inner wall surface of the motor housing.

9. A heat dissipating fan, comprising:

the shell forms an installation cavity and is provided with an air inlet and an air outlet which are communicated with the installation cavity;

the fan blade of any of claims 1-8, wherein said secondary blades are positioned proximate to said air inlet.

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