CN214480162U - Efficient heat dissipation structure of drive circuit board of outer rotor direct current brushless motor for fan - Google Patents
Efficient heat dissipation structure of drive circuit board of outer rotor direct current brushless motor for fan Download PDFInfo
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- CN214480162U CN214480162U CN202120744280.2U CN202120744280U CN214480162U CN 214480162 U CN214480162 U CN 214480162U CN 202120744280 U CN202120744280 U CN 202120744280U CN 214480162 U CN214480162 U CN 214480162U
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- volute
- fan
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Abstract
The utility model discloses a high-efficiency heat dissipation structure of a drive circuit board of an external rotor direct current brushless motor for a fan, which comprises a volute and the external rotor direct current brushless motor, wherein a centrifugal wind wheel is arranged in the volute, and the external rotor direct current brushless motor is arranged in the volute; the external rotor direct current brushless motor is electrically connected with the drive circuit board, a mounting box is arranged on the outer side of the volute, the drive circuit board and the heat dissipation aluminum piece are both located in the mounting box, one end of the heat dissipation aluminum piece is connected with the drive circuit board, and the other end of the heat dissipation aluminum piece extends into the volute. The heat generated by the driving circuit board during working can be conducted through the heat dissipation aluminum piece; the other end of the heat dissipation aluminum part extends into the volute, so that heat on the heat dissipation aluminum part is conducted to an air outlet side air channel of the fan, active heat dissipation is performed on the heat dissipation aluminum part by means of air outlet of the fan, natural heat dissipation of the aluminum plate is compared, a better heat dissipation effect is achieved, overall processing and production cost is reduced, and overall performance is improved.
Description
Technical Field
The utility model belongs to a heat radiation structure especially relates to a high-efficient heat radiation structure of drive circuit board of external rotor direct current brushless motor for fan.
Background
A direct-current brushless motor in the centrifugal fan can normally operate only by matching with a driving circuit board, and how to take away heat in time when a power module on the circuit board generates heat greatly is of great importance to the service life of the motor. The reliability of the product is reduced even the circuit board is burned out due to the over-high temperature. Centrifugal fan and external rotor electric machine are when the cooperation, and for the overall structure size compactness as far as possible of guaranteeing the fan, so the motor assembly is inside the fan, and the common use has two kinds of different design thoughts:
firstly, the direct current brushless motor is integrated, namely the motor structure and the driving plate are integrated and connected with the wind wheel and are arranged inside the fan. Thus, the air duct is blocked, and the overall air volume performance is reduced; in addition, under different use environments, dust, water vapor, oil stain and high temperature exist in the air duct, and the process requirement for sealing and assembling the driving plate is higher. This concept is not adopted.
And secondly, only the body of the direct current motor is assembled in the air duct, and the driving plate is externally arranged outside the volute of the fan, so that the influence of adverse factors in the air duct is avoided, and the direct current motor is enabled to run in a better environment. The technical scheme is that the driving plate is arranged on a special plastic box and assembled on the outer side of the volute, and a heat radiation aluminum plate is used for radiating heat of the power module of the driving plate on the top of the box. And the heat dissipation effect is not ideal because the heat dissipation is naturally performed by the aluminum plate alone, and the high-temperature failure of the power module is caused under different use environment temperatures.
The drive circuit board is assembled in the plastic box and is cooled by the top aluminum plate, the size of the aluminum plate is designed according to the size of the plastic box, the total area is small, and the cooling effect is limited. If good heat balance is to be achieved, the aluminum plate needs to be designed to be very thick or be designed into a plurality of fins, so that the cost is very high, and the processing procedures are increased; and aluminum plate is as a part of the whole outward appearance structure of fan, and the heating panel of many fins is fragile, and influences pleasing to the eye. In addition, the plastic box for mounting the driving plate is designed into an aluminum alloy junction box which can meet the heat dissipation of the circuit board, but the junction box is a special-shaped piece designed by matching the appearance of the volute, the cost of an aluminum casting mold is quite high, and the processing technology is difficult; the aluminum junction box workpiece also far exceeds the cost of budget. The volute of fan does not have the plastics material, also can't dispel the heat.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can solve the high-efficient heat radiation structure of external rotor direct current brushless motor's for fan of at least one in the above-mentioned problem.
According to the utility model discloses an aspect provides a high-efficient heat radiation structure of dirver circuit board of external rotor DC brushless motor for fan, including spiral case and external rotor DC brushless motor, be equipped with centrifugal wind wheel in the spiral case, external rotor DC brushless motor locates in the spiral case, its characterized in that still includes dirver circuit board and heat dissipation aluminium part, and external rotor DC brushless motor is connected with dirver circuit board electricity, and the outside of spiral case is equipped with the mounting box, and dirver circuit board and heat dissipation aluminium part all are located the mounting box, and the one end and the dirver circuit board of heat dissipation aluminium part are connected, and the other end stretches into in the spiral case.
The utility model has the advantages that: the heat dissipation aluminum piece is fixed with the driving circuit board, so that heat generated when the driving circuit board works can be conducted through the heat dissipation aluminum piece, and the driving circuit board is prevented from being overheated; the other end of the heat dissipation aluminum part extends into the volute, so that when the fan works, heat on the heat dissipation aluminum part is conducted to the air outlet side air duct of the fan, active heat dissipation is carried out on the heat dissipation aluminum part by means of air outlet of the fan inner wind wheel, and compared with natural heat dissipation of an aluminum plate in the prior art, the heat dissipation aluminum part has a better heat dissipation effect, integral processing and production cost are reduced, and integral performance is improved.
In some embodiments, the heat dissipation aluminum member includes a connecting plate fixed to the bottom of the driving circuit board, and a heat conduction column disposed at the bottom end of the connecting plate and extending into the volute. Therefore, the connection with the driving circuit board is facilitated through the connecting plate, so that heat generated by the driving circuit board during working can be directly conducted to the heat dissipation aluminum piece; be equipped with the heat conduction post, can conveniently be convenient with the air-out side wind channel of heat conduction to fan, be convenient for realize quick heat dissipation.
In some embodiments, the connecting plate and the heat-conducting column are of an integrally formed structure. Therefore, the whole radiating aluminum piece can be conveniently processed and molded, and the production cost is favorably reduced.
In some embodiments, the outer side of the volute is provided with a mounting column, the mounting column is located in the mounting box, and the heat conduction column penetrates through the mounting column and then extends into the volute. Therefore, the installation and positioning of the heat dissipation aluminum piece can be facilitated by arranging the installation column, and the installation is convenient.
In some embodiments, there are two heat-conducting posts, and two mounting posts are disposed corresponding to the heat-conducting posts. Therefore, the installation stability of the heat conduction column is ensured, and the heat conduction efficiency of the heat conduction column is improved.
In some embodiments, the driving circuit board high-efficiency heat dissipation structure of the outer rotor brushless dc motor for the blower further comprises a cover plate, and the cover plate is covered on the top of the mounting box. From this, be equipped with the apron, can play the guard action to each structure in the mounting box, and prevented the entering of dust and steam etc. and do benefit to and improve whole life.
In some embodiments, the mounting post is an integrally formed structure with the volute. Thus, the whole processing and production are convenient.
Drawings
Fig. 1 is an explosion structure diagram of a driving circuit board of an external rotor dc brushless motor for a blower according to the present invention;
fig. 2 is a schematic structural diagram of the high-efficiency heat dissipation structure of the driving circuit board of the external rotor dc brushless motor for the blower according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Refer to fig. 1 to 2. The efficient heat dissipation structure of the drive circuit board of the outer rotor direct current brushless motor for the fan comprises a volute 1 and an outer rotor direct current brushless motor 2, a centrifugal wind wheel 3 is installed in the volute 1, and the outer rotor direct current brushless motor 2 is arranged in the volute 1. The efficient heat dissipation structure of the drive circuit board of the outer rotor direct current brushless motor for the fan further comprises a drive circuit board 4 and a heat dissipation aluminum piece 5, the outer rotor direct current brushless motor 2 is electrically connected with the drive circuit board 4 through a conducting wire, a mounting box 6 is arranged on the outer side of the volute 1, the drive circuit board 4 and the heat dissipation aluminum piece 5 are both located in the mounting box 6, one end of the heat dissipation aluminum piece 5 is connected with the drive circuit board 4, and the other end of the heat dissipation aluminum piece extends into an air outlet side air duct in the volute 1. Wherein, the volute 1 is a plastic piece, and the mounting box 6 is a plastic piece; the mounting box 6 is fixed on the outer side of the volute 1 through screws, the bottom of the mounting box 6 is attached to the volute 1, the mounting box 6 is convenient to mount, and external dust, water vapor and the like are effectively prevented from entering the mounting box.
The utility model discloses a high-efficient heat radiation structure of drive circuit board of external rotor DC brushless motor for fan is when using, and drive circuit board 4 control external rotor DC brushless motor 2's operating condition, and external rotor DC brushless motor 2 drives centrifugal wind wheel 3 and rotates. Drive circuit board 4 is at the during operation, and the heat conduction of production is to heat dissipation aluminium alloy 5, and the heat is conducted the air-out side wind channel of fan through heat dissipation aluminium alloy 5, with the help of the rotatory air-out of wind wheel in the fan, carries out the heat dissipation of initiative to heat dissipation aluminium alloy 5 for thermal effluence has been accelerated, has effectively avoided drive circuit board 4 overheat phenomenon to appear, has improved drive circuit board 4's life.
The heat dissipation aluminum member 5 includes a connection plate 51 and a heat conduction column 52, the connection plate 51 is fixed to the bottom of the driving circuit board 4, and the heat conduction column 52 is disposed at the bottom end of the connection plate 51 and extends into the scroll casing 1. The connecting plate 51 is a flat plate and is fixed to the bottom of the driving circuit board 4 by screws, so that the whole heat dissipation aluminum piece 5 and the driving circuit board 4 can be conveniently fixed.
The connecting plate 51 and the heat-conducting column 52 are of an integrated structure, which is beneficial to the forming and processing of the whole radiating aluminum piece 5; the heat-conducting column 52 is cylindrical and is arranged perpendicular to the connecting plate 51.
The outer side of the volute 1 is provided with a mounting column 11, the mounting column 11 is positioned in the mounting box 6, and the heat conducting column 52 penetrates through the mounting column 11 and then extends into the volute 1. In order to fix the mounting box 6 and the volute 1 conveniently, a mounting hole is formed in the bottom of the mounting box 6 and is installed in a matched mode with the mounting column 11, and the mounting column 11 penetrates through the mounting hole and then extends into the mounting box 6. Through being equipped with erection column 11 for heat dissipation aluminium spare 5 when the installation, the heat conduction post 52 aims at the erection column 11 and inserts the back, can stretch into in the spiral case 1, has made things convenient for the location and the installation of heat dissipation aluminium spare 5.
The number of the heat conduction columns 52 is two, the two mounting columns 11 are arranged corresponding to the two heat conduction columns 52, namely the mounting columns 11 are in one-to-one corresponding mounting fit with the heat conduction columns 52, and the two heat conduction columns 52 prevent the heat dissipation aluminum piece 5 from rotating after being mounted, so that the mounting stability of the heat dissipation aluminum piece 5 is improved; meanwhile, by providing two heat-conducting columns 52, the heat-conducting efficiency can be improved, and the heat generated on the driving circuit board 4 can be dissipated in time.
The utility model discloses a high-efficient heat radiation structure of external rotor DC brushless motor's for fan drive circuit board still includes apron 7, and 7 lids of apron are established at the top of mounting box 6. The cover plate 7 is fixedly installed at the top of the mounting box 6 through screws, and plays a role in protecting various structures in the mounting box 6.
The mounting column 11 and the volute 1 are of an integrally formed structure. Thus, the whole processing and production are convenient.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.
Claims (7)
1. The efficient heat dissipation structure of the drive circuit board of the outer rotor direct-current brushless motor for the fan comprises a volute (1) and the outer rotor direct-current brushless motor (2), wherein a centrifugal wind wheel (3) is arranged in the volute (1), and the outer rotor direct-current brushless motor (2) is arranged in the volute (1).
2. The efficient heat dissipation structure for the driving circuit board of the external rotor brushless DC motor for the blower according to claim 1, wherein the heat dissipation aluminum member (5) comprises a connection plate (51) and a heat conduction column (52), the connection plate (51) is fixed to the bottom of the driving circuit board (4), and the heat conduction column (52) is arranged at the bottom end of the connection plate (51) and extends into the volute (1).
3. The efficient heat dissipation structure for the driving circuit board of the external rotor brushless dc motor for the blower according to claim 2, wherein the connecting plate (51) and the heat conducting pillar (52) are integrally formed.
4. The efficient heat dissipation structure of the driving circuit board of the external rotor brushless DC motor for the blower according to claim 3 is characterized in that a mounting column (11) is arranged outside the volute (1), the mounting column (11) is located in the mounting box (6), and the heat conduction column (52) penetrates through the mounting column (11) and then extends into the volute (1).
5. The efficient heat dissipation structure for the driving circuit board of the external rotor brushless DC motor for the blower according to claim 4, wherein the number of the heat conduction columns (52) is two, and the number of the mounting columns (11) is two corresponding to the number of the heat conduction columns (52).
6. The efficient heat dissipation structure for the drive circuit board of the external rotor brushless DC motor for the fan according to any one of claims 1 to 5, further comprising a cover plate (7), wherein the cover plate (7) is covered on the top of the mounting box (6).
7. The efficient heat dissipation structure for the driving circuit board of the external rotor brushless DC motor for the blower according to claim 5, wherein the mounting post (11) and the volute (1) are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120744280.2U CN214480162U (en) | 2021-04-12 | 2021-04-12 | Efficient heat dissipation structure of drive circuit board of outer rotor direct current brushless motor for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120744280.2U CN214480162U (en) | 2021-04-12 | 2021-04-12 | Efficient heat dissipation structure of drive circuit board of outer rotor direct current brushless motor for fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214480162U true CN214480162U (en) | 2021-10-22 |
Family
ID=78178377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120744280.2U Active CN214480162U (en) | 2021-04-12 | 2021-04-12 | Efficient heat dissipation structure of drive circuit board of outer rotor direct current brushless motor for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214480162U (en) |
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2021
- 2021-04-12 CN CN202120744280.2U patent/CN214480162U/en active Active
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