CN222121855U - An outer rotor centrifugal fan - Google Patents
An outer rotor centrifugal fan Download PDFInfo
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- CN222121855U CN222121855U CN202421498047.0U CN202421498047U CN222121855U CN 222121855 U CN222121855 U CN 222121855U CN 202421498047 U CN202421498047 U CN 202421498047U CN 222121855 U CN222121855 U CN 222121855U
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- impeller
- heat dissipation
- centrifugal fan
- motor
- outer rotor
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- 230000017525 heat dissipation Effects 0.000 claims abstract description 62
- 238000001816 cooling Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Motor Or Generator Cooling System (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本实用新型涉及一种外转子离心风机，包括安装座、集流器、设置在所述安装座上用于为离心风机提供动力的电机和由电机驱动的叶轮；所述叶轮包括用于将叶轮固定到电机上的叶轮后盘、固定在叶轮后盘上的叶轮叶片和叶轮前盘；所述叶轮后盘的任意一侧或两侧设置有随叶轮同步转动且在转动时为电机提供散热气流的辅助散热轮。本实用新型在不改变现有电机模具的前提下，在电机靠近叶轮后盘侧增加辅助散热轮，改善电机在该位置的散热气流。
The utility model relates to an outer rotor centrifugal fan, comprising a mounting seat, a collector, a motor arranged on the mounting seat for providing power for the centrifugal fan, and an impeller driven by the motor; the impeller comprises an impeller rear disc for fixing the impeller to the motor, impeller blades fixed on the impeller rear disc, and an impeller front disc; an auxiliary heat dissipation wheel which rotates synchronously with the impeller and provides heat dissipation airflow for the motor when rotating is arranged on any one side or both sides of the impeller rear disc. The utility model adds an auxiliary heat dissipation wheel on the side of the motor close to the impeller rear disc without changing the existing motor mold, so as to improve the heat dissipation airflow of the motor at this position.
Description
Technical Field
The utility model relates to the field of centrifugal fans, in particular to an outer rotor centrifugal fan.
Background
The outer rotor centrifugal fan mainly comprises an outer rotor motor, an impeller, an air inlet and a volute (not required), wherein the motor is arranged at the center of the centrifugal impeller, and the size and the weight of the motor are far smaller than those of fan products matched with the traditional motor, so that the motor is widely applied.
In the prior art, an external rotor motor with larger power often encounters the problem of overhigh temperature rise, and the reason is as follows:
1. such outer rotor motors do not have a radiator fan;
2. The air flow of the fan is unevenly distributed on the surface of the outer rotor motor, namely, the motor is close to the front disc side of the impeller, the air flow is dense, the heat dissipation effect is better, the motor is close to the rear disc side of the impeller, the air flow speed is extremely low, the heat dissipation effect is poorer, and the position is the core area of heat dissipation of a motor winding;
3. The part of external rotor motor dispels the heat through punching on the casing surface, but can reduce the protection level of motor like this, and then influence the reliability, is unfavorable to adopt.
Disclosure of utility model
In view of the above, the utility model provides an outer rotor centrifugal fan, which aims to solve the problems in the prior art.
The outer rotor centrifugal fan comprises a mounting seat, a collector, a motor and an impeller, wherein the motor is arranged on the mounting seat and used for providing power for the centrifugal fan, the impeller is driven by the motor, the impeller comprises an impeller rear disc used for fixing the impeller to the motor, impeller blades and an impeller front disc, the impeller blades are fixed on the impeller rear disc, and an auxiliary heat dissipation wheel which synchronously rotates along with the impeller and provides heat dissipation airflow for the motor during rotation is arranged on the impeller rear disc.
On the basis of the scheme, the auxiliary heat dissipation wheel comprises a circular flange used for fixing the auxiliary heat dissipation wheel to the impeller rear disc and a plurality of heat dissipation fins arranged on the circular flange.
On the basis of the scheme, the auxiliary heat dissipation wheel is arranged on one side of the impeller rear disc, which is close to the current collector, and/or one side of the impeller rear disc, which is far away from the current collector.
On the basis of the scheme, when the auxiliary heat dissipation wheel is arranged on one side of the impeller rear disc, which is close to the current collector, the auxiliary heat dissipation wheel is arranged in a space surrounded by the impeller blades.
On the basis of the scheme, when the auxiliary heat dissipation wheel is arranged on one side of the impeller rear disc, which is far away from the current collector, the mounting seat is provided with a vent hole for heat dissipation airflow circulation.
On the basis of the scheme, the radiating fin comprises a transverse straight section, a first vertical straight section, a bevel section and a second vertical straight section;
The extension line of the transverse straight edge section passes through the central axis of the circular flange;
The first vertical edge section and the second vertical edge section are parallel to each other and are perpendicular to the transverse edge section;
the first vertical section is close to the inner side of the circular flange and has a length greater than that of the second vertical section.
On the basis of the scheme, the length of the transverse straight section is equal to the annular width of the annular flange.
On the basis of the scheme, the number of the radiating fins is 8.
On the basis of the scheme, the radiating fins are distributed in the circular flange in a central symmetry mode.
The outer rotor centrifugal fan is characterized in that the outer rotor centrifugal fan comprises a plurality of annular flanges and a plurality of cooling fins, wherein the annular flanges are arranged on the impeller, the cooling fins are arranged on the annular flanges and are distributed in a central symmetry mode, an auxiliary cooling wheel is additionally arranged on the side, close to the impeller, of the motor on the back plate, on the premise that an existing motor die is not changed, the cooling airflow of the motor at the position is improved, and the outer rotor centrifugal fan is suitable for upgrading the temperature rising performance of a shaped product and has the advantages of being wide in application range, low in cost and good in effect.
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 utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
Fig. 1 is a schematic structural diagram of an auxiliary heat dissipation wheel in embodiment 1;
fig. 2 is a schematic structural diagram (side view is shown) of the auxiliary heat dissipation wheel in embodiment 1;
Fig. 3 is a schematic structural diagram (top view is shown) of the auxiliary heat dissipation wheel in embodiment 1;
fig. 4 is a schematic view of the perspective view structure of the outer rotor centrifugal fan in embodiment 2;
FIG. 5 is a schematic structural view showing a part of the structure of an outer rotor centrifugal fan in embodiment 2;
Fig. 6 is a schematic structural view of the outer rotor centrifugal fan (showing the impeller and the motor) in embodiment 2;
fig. 7 is a schematic structural view of a part of the structure of the outer rotor centrifugal fan in embodiment 2 (two auxiliary heat dissipation wheels);
Fig. 8 is a schematic structural view of a mounting base of an outer rotor centrifugal fan in embodiment 2 (provided with a vent hole).
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. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
As shown in fig. 1-3, the present application provides an embodiment of an auxiliary heat dissipation wheel for a centrifugal fan, wherein the auxiliary heat dissipation wheel 12 comprises a circular flange 1 for fixing the auxiliary heat dissipation wheel 12 to a rear impeller disk 6-3 and a plurality of heat dissipation fins 2 arranged on the circular flange 1. Specifically, the annular flange 1 drives the cooling fin 2 to rotate under the condition that the impeller 6 of the fan 7 rotates to provide cooling airflow for the motor 7.
The inner diameter of the circular flange 1 is matched with the outer diameter of the motor, and a small gap is reserved.
Specifically, the radiating fin 2 is in a right trapezoid shape as a whole, and the radiating fin 2 comprises a transverse straight section 2-1, a first vertical straight section 2-2, a bevel section 2-3 and a second vertical straight section 2-4;
The transverse straight section 2-1 is fixedly connected with the circular flange 1, and the extension line of the transverse straight section 2-1 passes through the central axis of the circular flange 1;
The first vertical edge section 2-2 and the second vertical edge section 2-4 are parallel to each other and are perpendicular to the transverse edge section 2-1;
The first vertical section 2-2 is close to the inner side of the circular flange 1 and has a length greater than that of the second vertical section 2-4.
Wherein the length of the transverse straight section 2-1 is equal to the ring width of the circular ring flange 1.
As shown in fig. 3, in order to balance the problems of heat dissipation and design cost, as a preferred embodiment, the number of the heat dissipation fins 2 is 8, and the 8 heat dissipation fins 2 are uniformly distributed on the circular flange 1 in a central symmetry.
As a specific embodiment, the annular flange 1 and the heat sink 2 are integrally formed.
The impeller 6, the motor 7 and the mounting seat 4 are all conventional structures of a centrifugal fan, and do not belong to the innovation points of the utility model, and are not described herein.
Example 2
As shown in fig. 4 to 6, this embodiment provides an auxiliary heat dissipation wheel for a centrifugal fan according to embodiment 1, comprising a mounting base 4, a collector 5, a motor 7 provided on the mounting base 4 for powering the centrifugal fan, and an impeller 6 driven by the motor 7, wherein the impeller 6 comprises an impeller rear plate 6-3 for fixing the impeller 6 to the motor 7, impeller blades 6-2 fixed on the impeller rear plate 6-3, and an impeller front plate 6-1, and specifically, the impeller rear plate 6-3 is provided with the auxiliary heat dissipation wheel 12 of the embodiment 1 which rotates synchronously with the impeller 6 and provides heat dissipation air flow for the motor 7 when rotating.
As a specific embodiment, the auxiliary heat dissipation wheel 12 is disposed on the side of the impeller rear disc 6-3 close to the current collector 5 and/or on the side remote from the current collector 5.
Specifically, as shown in fig. 7, as a first embodiment of the arrangement of the auxiliary heat dissipation wheels 12, the auxiliary heat dissipation wheels 12 may be simultaneously disposed on two sides of the impeller back plate 6-3, so that when the motor 7 rotates, the auxiliary heat dissipation wheels 12 on two sides of the impeller back plate 6-3 may disturb the air flow, thereby increasing the effect of the air flow and effectively improving the heat dissipation capability of the motor 7.
As a second embodiment of the arrangement of the auxiliary heat dissipation wheel 12, as shown in fig. 5, when the auxiliary heat dissipation wheel 12 is arranged on the side of the impeller back plate 6-3 close to the collector 5, the auxiliary heat dissipation wheel 12 is arranged in the space surrounded by the impeller blades 6-2. In the design, the auxiliary heat dissipation wheel 12 is closer to the motor 7, and the motor 7 is close to the impeller rear disc 6-3 side, so that the airflow speed is effectively increased, the heat dissipation effect is improved, and the position is the core area of heat dissipation of the motor winding.
As a third embodiment of the arrangement of the auxiliary heat dissipation wheel 12, the auxiliary heat dissipation wheel 12 is arranged on the side of the impeller rear disc 6-3 close to the mounting seat 4.
On the basis of the above scheme, when the auxiliary heat dissipation wheel 12 is disposed on one side of the impeller rear disc 6-3 away from the current collector 5, in order to improve the effect of gas flow, the mounting seat 4 is provided with a vent hole 4-1 for heat dissipation and airflow circulation. When the vent holes 4-1 are not arranged, because a relatively closed space is formed between the impeller rear disc 6-3 and the mounting seat 4, the air flow pumped out by the auxiliary heat dissipation wheel 12 is sucked back from one side close to the mounting seat 4 due to negative pressure formed near the motor, so that a good air circulation effect cannot be achieved, and a good heat dissipation effect cannot be achieved.
During installation, the circular flange 1, the impeller rear disc 6-3 and the installation seat 4 are fixedly connected through bolts. Specifically, a plurality of threaded holes are formed in the annular flange 1 along the circumferential direction, the annular flange 1 is fixedly connected with the impeller 6 and the motor 7, the impeller 6 is fastened with the mounting seat 4 through eight bolts, the annular flange 1 is fastened through the eight bolts, the annular flange 1 rotates along with the impeller 6, and air flow near the impeller rear disc 6-3 of the motor 7 is disturbed, so that a heat dissipation effect is achieved.
The outer rotor centrifugal fan is used for improving the heat dissipation airflow of the motor 7 at the position.
The mounting seat 4, the current collector 5, the impeller 6 and the motor 7 are all conventional structures of a centrifugal fan, and the connection mode of each component belongs to the conventional technology in the field and is not an innovation point of the utility model and is not repeated herein.
On the premise of not changing the existing motor die, the utility model provides a solution to the problem of temperature rise of an outer rotor centrifugal fan, wherein an auxiliary heat dissipation wheel 12 is added on the side of the motor 7, which is close to the impeller rear disc 6-3, so that the heat dissipation air flow of the motor 7 at the position is improved.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. The outer rotor centrifugal fan comprises a mounting seat (4), a current collector (5), a motor (7) and an impeller (6), wherein the motor (7) is arranged on the mounting seat (4) and is used for providing power for the centrifugal fan, the impeller (6) is driven by the motor (7), the impeller (6) comprises an impeller rear disc (6-3) used for fixing the impeller (6) on the motor (7), impeller blades (6-2) and an impeller front disc (6-1) which are fixed on the impeller rear disc (6-3), and the outer rotor centrifugal fan is characterized in that an auxiliary heat dissipation wheel (12) which synchronously rotates along with the impeller (6) and provides heat dissipation airflow for the motor (7) during rotation is arranged on the impeller rear disc (6-3).
2. The outer rotor centrifugal fan according to claim 1, characterized in that the auxiliary heat dissipation wheel (12) comprises a circular flange (1) for fixing the auxiliary heat dissipation wheel (12) to the impeller rear disc (6-3) and a number of heat dissipation fins (2) arranged on the circular flange (1).
3. The outer rotor centrifugal fan according to claim 1, characterized in that the auxiliary heat dissipation wheel (12) is arranged on the side of the impeller rear disc (6-3) close to the collector (5) and/or on the side remote from the collector (5).
4. An outer rotor centrifugal fan according to claim 3, wherein when the auxiliary heat dissipation wheel (12) is arranged on one side of the impeller rear disc (6-3) close to the current collector (5), the auxiliary heat dissipation wheel (12) is arranged in a space surrounded by the impeller blades (6-2).
5. An outer rotor centrifugal fan according to claim 3, wherein when the auxiliary heat dissipation wheel (12) is arranged on one side of the impeller rear disc (6-3) far away from the current collector (5), a vent hole (4-1) for heat dissipation and airflow circulation is arranged on the mounting seat (4).
6. The outer rotor centrifugal fan according to claim 2, wherein the heat sink (2) comprises a lateral straight section (2-1), a first vertical straight section (2-2), a hypotenuse section (2-3) and a second vertical straight section (2-4);
The transverse straight section (2-1) is fixedly connected with the circular flange (1), and an extension line of the transverse straight section (2-1) passes through the central axis of the circular flange (1);
The first vertical edge section (2-2) and the second vertical edge section (2-4) are parallel to each other and are perpendicular to the transverse edge section (2-1);
the first vertical section (2-2) is close to the inner side of the circular flange (1) and has a length larger than that of the second vertical section (2-4).
7. The outer rotor centrifugal fan according to claim 6, wherein the length of the transverse straight section (2-1) is equal to the annular width of the annular flange (1).
8. The outer rotor centrifugal fan according to claim 2, characterized in that the number of cooling fins (2) is 8.
9. The outer rotor centrifugal fan according to claim 2, characterized in that the cooling fins (2) are distributed in a central symmetry manner on the circular flange (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421498047.0U CN222121855U (en) | 2024-06-28 | 2024-06-28 | An outer rotor centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421498047.0U CN222121855U (en) | 2024-06-28 | 2024-06-28 | An outer rotor centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222121855U true CN222121855U (en) | 2024-12-06 |
Family
ID=93672966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421498047.0U Active CN222121855U (en) | 2024-06-28 | 2024-06-28 | An outer rotor centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222121855U (en) |
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2024
- 2024-06-28 CN CN202421498047.0U patent/CN222121855U/en active Active
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