CN210829802U

CN210829802U - Fan structure with inclined duct

Info

Publication number: CN210829802U
Application number: CN201921699203.9U
Authority: CN
Inventors: 侯春洪
Original assignee: Suzhou Bostec Precision Motors Corp ltd
Current assignee: Suzhou Bostec Precision Motors Corp ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-06-23
Anticipated expiration: 2029-10-11

Abstract

The utility model provides a fan structure with oblique duct, it includes the duct shell, the impeller, including a motor, an end cap, a controller, and a cover plate, the duct, front bearing and rear bearing, the duct shell is cylindrical shell, the relative both ends of duct shell form air inlet end and air-out end respectively, impeller mounting is in the air inlet end, the motor is installed in the air-out end, and the motor, front bearing and rear bearing are installed in the duct, the drive shaft of motor passes the center dish portion that the duct was connected the impeller, the first end of duct extends to center dish portion, the second end of relative first end extends to the air-out end on the duct, the cross sectional area of first end is less than the cross sectional area of second end. The utility model discloses compare in prior art and reached the effect that has both increased the amount of wind and increaseed the wind speed to can promote the whole wind efficiency of fan effectively.

Description

Fan structure with inclined duct

Technical Field

The utility model relates to a fan field particularly, relates to a fan structure with oblique duct.

Background

The existing fans have various structures, as shown in fig. 1, in one of them, an impeller 51 is installed at an air inlet end, a motor 52 is installed at an air outlet end, a bearing 53 and a duct 54 (or called as an air duct) are arranged in the middle, the duct 54 is connected with a casing 55 into a whole, and the impeller 51 is also located in the casing 55. The blades of the impeller 51 are attached to a central disk portion 511. the disk portion 511 has a hole in its center and is mounted to a shaft 521. the trailing motor 52 is typically comprised primarily of a stator and a rotor, with the stator or stator housing typically being in the inner diameter of the duct in the case of a dc brushless motor.

In order to keep the ventilation smooth, the diameter of the disk portion 511 is the inner diameter of the blade, and is usually not smaller than the cross-sectional area of the duct 54, but the duct 54 is straight at present, that is, the inner diameter of the duct 54 is not changed, and the inner diameter of the duct 54 limits the size of the inner diameter of the blade, which is related to the size of the air volume. Therefore, the inner diameter of the current duct limits the inner diameter of the blade, and the air quantity is limited, so that the overall wind efficiency of the fan is influenced.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a fan structure with oblique duct can reach the effect that both increases the amount of wind and increase the wind speed to can promote the whole wind efficiency of fan effectively.

Therefore, the utility model provides a fan structure with oblique duct, it includes the duct shell, the impeller, including a motor, an end cap, a controller, and a cover plate, the duct, front bearing and rear bearing, the duct shell is cylindrical shell, the relative both ends of duct shell form air inlet end and air-out end respectively, impeller mounting is in the air inlet end, the motor is installed in the air-out end, and the motor, front bearing and rear bearing are installed in the duct, the drive shaft of motor passes the center dish portion of duct and connection impeller, the first end of duct extends to center dish portion, the second end of relative first end extends to the air-out end on the duct, the cross sectional area of first end is less than the cross sectional area of second end.

Furthermore, the duct comprises a cylindrical partition plate unit and a conical partition plate unit, the third end of the conical partition plate unit and the cylindrical partition plate unit are in butt joint or integrally formed along the axial direction of the duct shell, and the first end is a tapered end, opposite to the third end, of the conical partition plate unit.

Further, the third end of the conical diaphragm unit is equal to the cross-sectional area of the cylindrical diaphragm unit.

Further, the area of the first end is equal to the area of the central disk portion.

Further, the motor is installed in the cylindrical partition unit.

Optionally, the outer end of the motor is exposed to the second end of the cylindrical partition unit.

Further, the front bearing and the rear bearing are installed in the conical partition unit.

The utility model provides a fan structure with oblique duct, mainly improve original straight duct into oblique duct structure, wherein, make the internal diameter of blade as little as possible under the circumstances of guaranteeing installation intensity and reliability, the internal diameter of the anterior segment of duct (namely close to the impeller end) is equivalent to the internal diameter of blade (namely the external diameter of disk-shaped position), the internal diameter of the rear end of duct can be bigger because of the external diameter need of the motor stator; thus forming a structure with a large front end and a small back end of the duct;

the utility model provides a fan structure with oblique duct's advantage lies in: firstly, the area of the blade is enlarged, so that the air quantity is increased; secondly, the rear end duct is smaller than the front end duct, so that the wind speed is accelerated;

therefore, the utility model provides a fan structure with oblique duct compares in prior art and has reached the effect that has both increased the amount of wind and has increaseed the wind speed to can promote the whole wind efficiency of fan effectively.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a prior art fan configuration;

fig. 2 is a schematic structural diagram of a fan structure with an oblique duct according to an embodiment of the present invention;

fig. 3 is a left side view of fig. 2.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Referring to fig. 2 to 3, the utility model provides a fan structure with oblique duct has been shown in the figure, wherein duct shell 1 has mainly been set up, impeller 2, motor 3, duct 4, front bearing 5 and rear bearing 6, duct shell 1 is cylindrical shell, air inlet end 11 and air-out end 12 are formed respectively to duct shell 1's relative both ends, impeller 2 installs in air inlet end 11, motor 3 installs in air-out end 12, and motor 3, front bearing 5 and rear bearing 6 install in duct 4, motor 3's drive shaft 31 passes duct 4 and connects impeller 2's central disk portion 21, specifically, drive shaft 31's end connection front bearing 5, front bearing 5 rotates connects rear bearing 6, impeller center pin 22 is connected to rear bearing 6.

With continued reference to fig. 2-3, the first end 41 of the duct 4 extends toward the central disk portion 21, the second end 42 of the duct 4 opposite the first end 41 extends toward the outlet end 12, and the cross-sectional area of the first end 41 is less than the cross-sectional area of the second end 42.

With continued reference to fig. 2 to 3, in particular, the duct 4 comprises a cylindrical diaphragm unit 43 and a conical diaphragm unit 44, the motor 3 is mounted in the cylindrical diaphragm unit 43, the front bearing 5 and the rear bearing 6 are mounted in the conical diaphragm unit 44, the third end 441 of the conical diaphragm unit 44 and the cylindrical diaphragm unit 43 are butted or integrally formed along the axial direction of the duct housing 1, and the first end 41 is a tapered end of the conical diaphragm unit 44 opposite to the third end 441.

With continued reference to figures 2 to 3, preferably the third end 441 of the conical diaphragm unit 44 is equal to the cross-sectional area of the cylindrical diaphragm unit 43 and the area of the first end 41 is equal to the area of the central disc portion 21.

Moreover, in other cases, the outer end of the motor 3 is exposed at said second end 42 of the cylindrical diaphragm unit 43, i.e. the portion of the motor 3 located inside the duct. In the fan structure with the oblique duct provided by the embodiment, the original straight duct is mainly improved into the oblique duct structure, wherein the inner diameter of the blade is made as small as possible under the condition of ensuring the installation strength and reliability, the inner diameter of the front section (close to the impeller end) of the duct is equivalent to the inner diameter of the blade (namely the outer diameter of the disc-shaped part), and the inner diameter of the rear end of the duct can be larger as required by the outer diameter of the motor stator; thus forming a structure with a large front end and a small back end of the duct;

the fan structure with oblique duct that this embodiment provided has and lies in: firstly, the area of the blade is enlarged, so that the air quantity is increased; secondly, the rear end duct is smaller than the front end duct, so that the wind speed is accelerated;

therefore, the fan structure with the inclined duct provided by the embodiment achieves the effects of increasing the air quantity and increasing the air speed compared with the prior art, so that the overall wind efficiency of the fan can be effectively improved.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a fan structure with oblique duct, its characterized in that, includes duct shell (1), impeller (2), motor (3), duct (4), front bearing (5) and rear bearing (6), duct shell (1) is cylindrical shell, the relative both ends of duct shell (1) form air inlet end (11) and air-out end (12) respectively, impeller (2) install in air inlet end (11), motor (3) install in air-out end (12), just motor (3), front bearing (5) with rear bearing (6) install in duct (4), drive shaft (31) of motor (3) pass duct (4) and connect the central disk portion (21) of impeller (2), first end (41) of duct (4) extend to central disk portion (21), second end (42) relative to first end (41) on duct (4) are to air-out end (12) ) Extending, the cross-sectional area of the first end (41) being smaller than the cross-sectional area of the second end (42).

2. A fan structure with oblique duct according to claim 1, characterized in that said duct (4) comprises a cylindrical diaphragm unit (43) and a conical diaphragm unit (44), the third end (441) of said conical diaphragm unit (44) and said cylindrical diaphragm unit (43) are butted or integrally formed along the axial direction of said duct casing (1), said first end (41) being a tapered end of said conical diaphragm unit (44) opposite to said third end (441).

3. A fan structure with oblique ducts according to claim 2, characterised in that the third end (441) of said conical diaphragm unit (44) is equal to the cross-sectional area of said cylindrical diaphragm unit (43).

4. A fan structure with oblique ducts according to claim 1 or 2, characterised in that the area of said first end (41) is equal to the area of said central disc portion (21).

5. A fan structure with oblique ducts according to claim 2, characterized in that said electric machine (3) is mounted inside said cylindrical partition unit (43).

6. A fan structure with diagonal ducts according to claim 2, characterized in that the outer end of the electric motor (3) is exposed at the second end (42) of the cylindrical diaphragm unit (43).

7. A fan structure with oblique ducts according to claim 2, characterized in that said front bearing (5) and said rear bearing (6) are mounted inside said conical partition unit (44).