CN212563751U

CN212563751U - Miniature fan

Info

Publication number: CN212563751U
Application number: CN202021424810.7U
Authority: CN
Inventors: 贾自周
Original assignee: Dongguan Hongying Electronic Technology Co ltd
Current assignee: Dongguan Hongying Electronic Technology Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-02-19
Anticipated expiration: 2030-07-20

Abstract

The utility model discloses a micro fan, which comprises a first shell, a second shell arranged at one side of the first shell, a motor arranged in the first shell or the second shell, and an impeller in transmission connection with the motor; the impeller comprises a first shell, a second shell, a third shell, an air outlet, a third air inlet, a third air outlet and an air outlet, wherein one side of the first shell is provided with at least one first air inlet, one side of the second shell is provided with at least one second air inlet, a third air outlet is arranged between the first shell and the second shell, the first air inlet, the second air inlet, the third air outlet and the air outlet are respectively communicated with the inside of the impeller, and the air outlet is arranged along the tangential direction of the rotating direction of the outer side; the inner wall of the impeller is provided with blades which are arranged in a circumferential array, and the impeller has the advantages of large air quantity, large static pressure, small air fluid leakage and low eddy loss.

Description

Miniature fan

Technical Field

The utility model relates to a fan especially relates to a miniature fan.

Background

Nowadays, the volume of electronic products is smaller and smaller, so that the heat productivity of chips in unit volume is larger and larger, the performance of the fan is more important to be improved as a main radiating element, and the performance optimization of an impeller of a main working part in the fan is particularly important. There are three types of fans commonly used at present, which are axial flow fans, centrifugal fans, and cross flow fans. The axial flow fan has large air quantity but low static pressure, and the centrifugal fan has small air quantity and high static pressure. The cross flow fan is axially longer, with a relatively large flow but very low static pressure. Neither of them is well suited for use in small consumer electronics.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned defect among the prior art, provide a promote intake and static pressure, reduce air fluid leakage and eddy current loss, promote the miniature fan of fluid efficiency under the unit volume.

In order to achieve the above object, the present invention provides a micro fan, which includes a first housing, a second housing fixedly mounted on one side of the first housing, a motor mounted inside the first housing or the second housing, and an impeller drivingly connected to the motor; the impeller comprises a first shell, a second shell, a third shell, an air outlet, a third air inlet, a third air outlet and an air outlet, wherein one side of the first shell is provided with at least one first air inlet, one side of the second shell is provided with at least one second air inlet, a third air outlet is arranged between the first shell and the second shell, the first air inlet, the second air inlet, the third air outlet and the air outlet are respectively communicated with the inside of the impeller, and the air outlet is arranged along the tangential direction of the rotating direction of the outer side; the impeller is provided with blades arranged in a circumferential array.

Preferably, the first shell comprises a first shell fixedly connected with one side of the second shell, and a motor base fixedly connected with one side of the first shell; the motor is installed on the motor cabinet, first air intake setting is on the motor cabinet, the third ventilation opening sets up between first shell and second casing, one side of first shell is provided with the air outlet.

Preferably, the middle part cover of motor cabinet is equipped with first bearing, the impeller cover is established at first bearing internal rotation and is connected.

Preferably, the first housing is provided with a first mounting hole.

Preferably, the second shell comprises a second shell fixedly connected with one side of the first shell, and an end cover fixedly connected with one side of the second shell; the second air inlet is arranged on the end cover, the third air inlet is arranged between the second shell and the first shell, and an air outlet is arranged on one side of the second shell.

Preferably, the middle part of the end cover is provided with a second bearing, and the impeller is sleeved in the second bearing and is connected in a rotating mode.

Preferably, the second housing is provided with a second mounting hole.

Preferably, the third vent is of a C-shaped design.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model is provided with a first shell, a second shell, a motor and an impeller, has the advantages of less parts and simple and compact structure, wherein, a first air inlet is arranged at one side of the first shell, a second air inlet is arranged at one side of the second shell, and a third air inlet is arranged between the first shell and the second shell, thereby improving the application range of the utility model; the impeller is provided with blades which are arranged in a circumferential array, and the static pressure can be fully improved by the impeller with the structure; and the air outlet that sets up along the tangential of impeller lateral surface direction of rotation, when the impeller rotated, this design can reduce air fluid leakage and eddy current loss, promote the fluid efficiency under the unit volume to be applicable to for small-size consumer electronics product heat dissipation.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a first structure of a micro fan provided by the present invention;

fig. 2 is a second schematic structural diagram of a micro fan provided in the present invention;

fig. 3 is a schematic cross-sectional view of a micro fan provided by the present invention;

fig. 4 is an exploded view of a micro fan provided by the present invention;

fig. 5 is a schematic structural diagram of an impeller provided by the present invention;

fig. 6 is a comparison graph of the performance of the micro fan and the conventional fan under the same size and noise.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-5, the present invention provides a micro fan, which is characterized in that the micro fan comprises a first casing 1, a second casing 2 fixedly connected to one side of the first casing 1, a motor 3 installed inside the first casing 1 or the second casing 2, and an impeller 4 in transmission connection with the motor 3; at least one first air inlet 5 is formed in one side of the first shell 1, at least one second air inlet 6 is formed in one side of the second shell 2, a third vent 7 is formed between the first shell 1 and the second shell 2, air outlets 8 are formed in one sides of the first shell 1 and the second shell 2, the first air inlet 5, the second air inlet 6, the third vent 7 and the air outlet 8 are respectively communicated with the inside of the impeller 4, and the air outlet 8 is arranged along the tangential direction of the rotating direction of the outer side surface of the impeller 4; the inner wall of the impeller 4 is provided with blades 41 arranged in a circumferential array.

The utility model is provided with a first shell 1, a second shell 2, a motor 3 and an impeller 4, and has the advantages of less parts and simple and compact structure, wherein, a first air inlet 5 is arranged at one side of the first shell 1, a second air inlet 6 is arranged at one side of the second shell 2, and a third air outlet 7 is arranged between the first shell 1 and the second shell 2, thereby improving the application range of the utility model; because the blades 41 arranged in a circumferential array are arranged on the impeller 4, the static pressure can be fully improved by arranging the impeller 4 with the structure, the third air inlet 7 is in a C-shaped design, and when the third air inlet 7 is designed into an air inlet, the static pressure is further improved by the C-shaped design; and the air outlet 8 that sets up along the tangential of impeller 4 lateral surface direction of rotation, when impeller 4 rotated, this design can reduce air fluid leakage and eddy current loss, promote the fluidic efficiency under the unit volume to be applicable to for the heat dissipation of small-size consumer electronics product. As shown in fig. 6, wherein the square point is the data of the traditional fan, and the triangle point represents the utility model provides a data of miniature fan when third ventilation opening 7 is designed into the air intake, can know by this fig. 6, the utility model discloses compare with traditional fan, under the same noise, flow promotes 70%, and the static pressure promotes 30%.

As shown in fig. 1-5, in order to facilitate assembly, the first casing 1 is divided into a first casing 11 and a motor base 12, the first casing 11 is installed on one side of the second casing 2 and fixedly connected, the motor base 12 is installed on one side of the first casing 11 and fixedly connected, the motor 3 is installed on the motor base 12, the first air inlet 5 is arranged on the motor base 12, the third air outlet 7 is arranged between the first casing 11 and the second casing 2, and the air outlet 8 is arranged on one side of the first casing 11. The middle part cover of motor cabinet 12 is equipped with first bearing 13, impeller 4 cover is established and is rotated in first bearing 13 and connect.

As shown in fig. 1-5, for the convenience of assembly, the second casing 2 includes a second housing 21 fixedly connected to one side of the first casing 1, and an end cap 22 fixedly connected to one side of the second housing 21; the second air inlet 6 is disposed on the end cover 22, the third air outlet 7 is disposed between the second casing 21 and the first casing 1, in this embodiment, the third air outlet 7 is disposed between the first casing 11 and the second casing 21, and an air outlet 8 is disposed on one side of the second casing 21. The middle part of the end cover 22 is provided with a second bearing 23, and the impeller 4 is sleeved on the second bearing 23 and is connected in a rotating mode.

Be provided with first mounting hole 111 on the first shell 11, be provided with second mounting hole 211 on the second shell 21, through setting up first mounting hole 111 and second mounting hole 211, be convenient for with the utility model discloses fix on external device.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. A micro fan is characterized by comprising a first shell (1), a second shell (2) fixedly connected with one side of the first shell (1), a motor (3) arranged in the first shell (1) or the second shell (2), and an impeller (4) in transmission connection with the motor (3);

one side of the first shell (1) is provided with at least one first air inlet (5), one side of the second shell (2) is provided with at least one second air inlet (6), a third ventilation opening (7) is arranged between the first shell (1) and the second shell (2), one sides of the first shell (1) and the second shell (2) are both provided with air outlets (8), the first air inlet (5), the second air inlet (6), the third ventilation opening (7) and the air outlets (8) are respectively communicated with the inside of the impeller (4), and the air outlets (8) are arranged along the tangential direction of the rotation direction of the outer side surface of the impeller (4);

the impeller (4) is provided with blades (41) arranged in a circumferential array.

2. The micro fan as claimed in claim 1, wherein the first casing (1) comprises a first housing (11) fixedly connected to one side of the second casing (2), and a motor base (12) fixedly connected to one side of the first housing (11);

the motor (3) is arranged on the motor base (12), the first air inlet (5) is arranged on the motor base (12), the third air inlet (7) is arranged between the first shell (11) and the second shell (2), and the air outlet (8) is arranged on one side of the first shell (11).

3. The micro fan as claimed in claim 2, wherein the motor base (12) is sleeved with a first bearing (13) at a middle portion thereof, and the impeller (4) is sleeved in the first bearing (13) for rotational connection.

4. A micro-fan according to claim 2, wherein the first housing (11) is provided with a first mounting hole (111).

5. The micro-fan as claimed in claim 1, wherein the second casing (2) comprises a second housing (21) fixedly connected to one side of the first casing (1), and an end cap (22) fixedly connected to one side of the second housing (21);

the second air inlet (6) is arranged on the end cover (22), the third ventilation opening (7) is arranged between the second shell (21) and the first shell (1), and an air outlet (8) is arranged on one side of the second shell (21).

6. The micro fan as claimed in claim 5, wherein the end cap (22) is provided with a second bearing (23) at a middle portion thereof, and the impeller (4) is rotatably connected with the second bearing (23) in a sleeved manner.

7. The micro-fan as claimed in claim 5, wherein the second housing (21) is provided with a second mounting hole (211).

8. A micro-fan according to claim 1, characterized in that the third ventilation opening (7) is of C-shaped design.