Side stand magnetic motor and cooling fan using side stand magnetic motor

A side stand magnetic motor and a cooling fan using the side stand magnetic motor are disclosed and are related to telecommunications device accessory technologies, so as to provide a motor that can effectively and fast dissipate heat generated by a coil of the side stand magnetic motor. The side stand magnetic motor includes a stator, where the stator includes a body and a coil disposed on the body; the magnetic motor further includes an engine base for fastening the stator, a thermally conductive structure of a heat transfer material is disposed on the stator, and the thermally conductive structure is in contact with and is connected to the engine base.

TECHNICAL FIELD

The present disclosure relates to telecommunications device accessory technologies, and in particular, to a side stand magnetic motor and a cooling fan using the side stand magnetic motor.

BACKGROUND

Development of social technologies leads to increasing power consumption of telecommunications devices; in addition, in order to ensure normal running of a device, a heat dissipation requirement of the device needs to be met. Therefore, a cooling fan with a high rotational speed comes into being. Correspondingly, a higher rotational speed of a cooling fan leads to higher motor power density required by the cooling fan.

A currently efficient side stand magnetic motor is used as an example. The side stand magnetic motor is generally disposed sideways, can implement relatively large power output in relatively small space, and has high practicality. As shown inFIG. 1, a cooling fan using a side stand magnetic motor includes a fan frame10and a fan base12fixedly connected to the frame10using a support bracket11, where a bearing seat13of the fan is fixedly connected to the fan base12, and the side stand magnetic motor used for sleeving and press-mounting a fan blade14is fixedly connected to the bearing seat13of the fan. The side stand magnetic motor includes a motor base15fixedly connected to the bearing seat13, and a stator (silicon steel sheet) is fastened on the motor base15, where the stator includes a tubular body161and a coil162wound around the body161, an insulation sheet163is disposed on an upper end face and a lower end face of the body161and between the body161and the coil162, and the coil162is bonded to and fastened on the motor base15by means of glue pouring, thereby completing fastening of the stator. A rotor is disposed outside the stator, where the rotor includes a tubular enclosure171, the fan blade14is sleeved outside the enclosure171, a rotor magnet172is fastened inside the enclosure171, and there is a gap between the rotor magnet172and the coil162of the stator. After the coil162is electrified, the stator can drive the rotor to rotate under the action of magnetic induction, thereby enabling the cooling fan to work normally.

In the prior art, heat generated by a coil is dissipated mainly through a gap between a stator and a rotor. Generally, in order to ensure an electromagnetic induction effect, a gap between the stator and the rotor is generally relatively small, causing a relatively small amount of airflow between the stator and the rotor; therefore, efficiency of heat dissipation through the foregoing gap is relatively low.

SUMMARY

Embodiments of the present disclosure provide a side stand magnetic motor and a cooling fan using the side stand magnetic motor, to provide a motor that can effectively and fast dissipate heat generated by a coil of the side stand magnetic motor.

To achieve the foregoing objective, the following technical solutions are adopted in the embodiments of the present disclosure.

According to a first aspect, a side stand magnetic motor is provided, including a stator, where the stator includes a body and a coil disposed on the body, the magnetic motor further includes an engine base for fastening the stator, and a thermally conductive structure of a heat transfer material is disposed on the stator; and the thermally conductive structure is in contact with and is connected to the engine base.

In a first possible implementation manner of the first aspect, the body is of a tubular structure.

With reference to the first possible implementation manner, in a second possible implementation manner, the thermally conductive structure includes a thermally conductive column penetrating through the tubular body, a first end of the thermally conductive column is located inside the body, and a second end thereof protrudes from the body; and the second end of the thermally conductive column is inserted and fastened into the engine base.

With reference to the second possible implementation manner, in a third possible implementation manner, the body is of a cylindrical structure.

With reference to the second and third possible implementation manners, in a fourth possible implementation manner, the thermally conductive column is of a cylindrical structure.

With reference to the second and third possible implementation manners, in a fifth possible implementation manner, the thermally conductive column is connected to the body in an interference fitting manner; or the thermally conductive column is fixedly connected to the body by means of welding.

With reference to the second and third possible implementation manners, in a sixth possible implementation manner, the thermally conductive column is fixedly connected to the engine base by means of welding or gluing.

With reference to the third possible implementation manner, in a seventh possible implementation manner, there are multiple thermally conductive columns penetrating through the body, and the multiple thermally conductive columns are arranged in a circumferential direction of the body.

In an eighth possible implementation manner of the first aspect, the thermally conductive structure includes two first thermally conductive brackets, the two first thermally conductive brackets are respectively located on an upper end face and a lower end face of the body of the stator, and the coil of the stator is wound around the first thermally conductive brackets and the body; and the first thermally conductive bracket located on the lower end face of the body is fixedly connected to the engine base.

With reference to the eighth possible implementation manner, in a ninth possible implementation manner, the body is of a cylindrical structure.

With reference to the ninth possible implementation manner, in a tenth possible implementation manner, the first thermally conductive bracket is of a circular ring structure matching the body.

With reference to the eighth to tenth possible implementation manners, in an eleventh possible implementation manner, the first thermally conductive bracket is matched with and connected to the engine base using a screw; or the first thermally conductive bracket is matched with and connected to the engine base by means of gluing.

With reference to the eighth to tenth possible implementation manners, in a twelfth possible implementation manner, a thermally conductive material is filled between the first thermally conductive bracket and the engine base.

With reference to the eighth to tenth possible implementation manners, in a thirteenth possible implementation manner, a thermally conductive material is filled between the coil and the engine base.

In a fourteenth possible implementation manner of the first aspect, the coil includes multiple metal strips of a sheet structure that are disposed at intervals, the thermally conductive structure is an interconnection board disposed between the stator and the engine base, and the interconnection board is fixedly connected to the engine base; and each of the metal strips includes two plates, where the two plates are respectively attached to an inner side wall and an outer side wall of the body, first ends of the two plates are connected, second ends of the two plates implement an electrical connection using a circuit inside the interconnection board, and the metal strips and the circuit inside the interconnection board jointly form an electrically conductive path of the coil.

With reference to the fourteenth possible implementation manner, in a fifteenth possible implementation manner, the body is of a cylindrical structure, the interconnection board is of a hollow disc-shaped structure, and an outer diameter of the interconnection board is greater than a diameter of the body; and the multiple metal strips are arranged in a circumferential direction of the body.

With reference to the fourteenth and fifteenth possible implementation manners, in a sixteenth possible implementation manner, pads are fixedly disposed on an upper surface of the interconnection board, and the second ends of the two plates are provided with extending ends fixedly connected to the pads; the pads and the extending ends are disposed in a one-to-one corresponding manner, a circuit allowing the two pads corresponding to the two plates to be in communication with each other is disposed inside the interconnection board, and two extending ends of each of the metal strips are respectively fastened on the pads of the extending ends independently of each other; and the two plates are in communication with the circuit inside the interconnection board using the pads.

With reference to the fourteenth and fifteenth possible implementation manners, in a seventeenth possible implementation manner, the interconnection board is fixedly connected to the engine base by means of gluing.

With reference to the fourteenth and fifteenth possible implementation manners, in an eighteenth possible implementation manner, a second thermally conductive bracket is further disposed on the body of the stator, and a top end face of the second thermally conductive bracket is fixedly connected to a bottom end face of the body, and a bottom end face of the second thermally conductive bracket is in contact with the interconnection board.

With reference to the eighteenth possible implementation manner, in a nineteenth possible implementation manner, the body is of a cylindrical structure, the second thermally conductive bracket is of a circular ring structure matching the cylindrical body, and a side surface of the second thermally conductive bracket is in contact with the second ends of the plates.

With reference to the seventeenth possible implementation manner, in a twentieth possible implementation manner, the interconnection board is made of an aluminum nitride (AlN) ceramic material.

According to a second aspect, a cooling fan is provided, including a fan frame, a fan base fixedly connected to the fan frame using a support bracket, and a fan blade, where the cooling fan further includes the foregoing side stand magnetic motor that is configured to drive the fan blade to rotate; and an engine base of the side stand magnetic motor is fixedly connected to the fan base.

In a first possible implementation manner of the second aspect, the engine base and the fan base are of an integrally formed structure.

With reference to the first possible implementation manner, in a second possible implementation manner, a heat sink fin is disposed on the support bracket.

According to the side stand magnetic motor and the cooling fan using the side stand magnetic motor that are provided in the embodiments of the present disclosure, the side stand magnetic motor includes a stator formed by a tubular body and a coil disposed on the body, the stator is fastened on an engine base of the side stand magnetic motor, a thermally conductive structure made of a thermally conductive material is disposed on the stator, and the thermally conductive structure is in contact with and is connected to the engine base. It can be learned through analysis that a thermally conductive structure made of a heat transfer material is disposed on a body and/or a coil, allowing heat generated in an operating process of the coil to be transferred to the thermally conductive structure through the coil and/or the body; then the heat is transferred to an engine base that is in contact with and that is connected to the thermally conductive structure. Because the thermally conductive structure is made of the heat transfer material and has a good heat-conducting property, it can be ensured that the heat generated by the coil is effectively transferred to the engine base through the thermally conductive structure in time, thereby dissipating the heat into air through the engine base in time, which meets a heat dissipation requirement of the side stand magnetic motor, increases power density of the side stand magnetic motor, and features high practicality.

DESCRIPTION OF EMBODIMENTS

The following describes in detail a side stand magnetic motor according to embodiments of the present disclosure with reference to the accompanying drawings.

An embodiment of the present disclosure provides a side stand magnetic motor, as shown inFIG. 2, including a stator, where the stator includes a body21and a coil22disposed on the body21. The side stand magnetic motor further includes an engine base23for fastening the stator, a thermally conductive structure of a heat transfer material is disposed on the stator, and the thermally conductive structure is in contact with and is connected to the engine base23.

The side stand magnetic motor provided in this embodiment of the present disclosure includes a stator consisting of a body and a coil disposed on the body, where the stator is fastened on an engine base of the side stand magnetic motor, a thermally conductive structure made of a heat transfer material is disposed on the stator, and the thermally conductive structure is in contact with and is connected to the engine base. It can be learned through analysis that a thermally conductive structure made of a heat transfer material is disposed on a body and/or a coil, allowing heat generated in an operating process of the coil to be transferred to the thermally conductive structure through the coil and/or the body; then the heat is transferred to an engine base that is in contact with and that is connected to the thermally conductive structure. Because the thermally conductive structure is made of the heat transfer material and has a good heat-conducting property, it can be ensured that the heat generated by the coil is effectively transferred to the engine base through the thermally conductive structure in time, thereby dissipating the heat into air through the engine base in time, which meets a heat dissipation requirement of the side stand magnetic motor, increases power density of the side stand magnetic motor, and features high practicality.

A different location and manner of disposing the thermally conductive structure on the stator leads to a different material, structure, and the like of the thermally conductive structure; however, it is required to ensure that the thermally conductive structure uses a material having a good heat transfer property.

In addition, the side stand magnetic motor is generally used in a cooling fan. Therefore, for ease of description of a heat dissipation process of the side stand magnetic motor in this embodiment and an application scenario thereof, the side stand magnetic motor and the cooling fan using the side stand magnetic motor are used as an example. As shown inFIG. 2, the cooling fan includes a fan frame24and a fan base26fixedly connected to the fan frame24using a support bracket25, where the fan base26is fixedly connected to the engine base23, and the side stand magnetic motor is configured to connect to a fan blade (not shown inFIG. 2), such that the fan blade can be driven to rotate. In actual application, the body21of the stator may be a silicon steel sheet having a good electromagnetic property, and the body21is generally of a tubular structure or may be of a cylindrical structure, which helps the coil22on the body21to drive the fan blade to rotate.

As shown inFIG. 2, the thermally conductive structure includes a cylindrical thermally conductive column27penetrating through the cylindrical body21of the stator; correspondingly, a through-hole for accommodating the thermally conductive column27needs to be disposed on the body21, and the thermally conductive column27may also be of a structure such as a cuboid or a cone. InFIG. 2, in order to ensure integrality of a structure of the stator, a first end of the thermally conductive column27is located inside the body21and may be disposed coplanar with an upper end face of the body21; a second end of the thermally conductive column27protrudes from the body21, such that this end can be inserted and fastened into the engine base23. It can be learned from this that heat generated in an operating process of the coil22is first transferred to the body21, then is transferred to the thermally conductive column27of a heat transfer material through the body21, further is transferred to the engine base23through the thermally conductive column27, and finally can be transferred, through the engine base23, to the fan base26fixedly connected to the engine base23. InFIG. 2, the heat in the fan base26can be further dissipated through the support bracket25, and inFIG. 2, a direction of an arrow is a flow direction of airflow generated when the cooling fan is operating. It can be learned from this that the airflow can draw away heat in the support bracket25and the fan base26, thereby achieving an objective of fast heat dissipation.

A material, for example, metal and ceramic, having a good heat-conducting property may be selected for all of the engine base23, the fan base26, and the support bracket25. A heat sink fin may be additionally disposed on the support bracket25according to a structural requirement, so as to improve a heat dissipation capability of the support bracket25. The engine base23and the fan base26may be two parts and be fixedly connected by means of welding, in an interference fitting manner, or the like; or the engine base23and the fan base26may be disposed integrally to shorten a heat transfer path.

In actual application, in order to improve a heat transfer effect of the thermally conductive column27, multiple thermally conductive columns27may be disposed, and the multiple thermally conductive columns27are evenly and equidistantly arranged in a circumferential direction of the body21. Because the coil22is generally evenly and equidistantly arranged on the body21, the thermally conductive columns27may be disposed between neighboring coil groups, so as to ensure proper overall arrangement; in addition, the thermally conductive columns27evenly transfer heat of the coil22, thereby avoiding a local overheating phenomenon.

Further, in order to improve heat exchange between the body21and the thermally conductive column27, generally, an area of contact between the body21and the thermally conductive column27may be increased, and seamless contact between the body21and the thermally conductive column27may be ensured. According to a thickness of a side wall of the body21, a diameter of the thermally conductive column27may be set to a value in conformity with the thickness of the side wall (the diameter is less than the thickness of the side wall); in addition, a gap between the body21and the thermally conductive column27is narrowed in an interference fitting manner, thereby ensuring sufficient contact. The thermally conductive column27may also be fastened to the body21by means of welding, thereby ensuring that no gap exists between the thermally conductive column27and the body21; in addition, by using metal, heat resistance for heat dissipation is reduced, a heat transfer capability is improved, and further a heat dissipation capability is improved.

In addition, a thermally conductive material may also be filled between the thermally conductive column27and an inner wall of the through-hole of the body21after the thermally conductive column27penetrates through the body21, so as to improve efficiency of heat transfer between the thermally conductive column27and the body21while fastening the thermally conductive column27.

The thermally conductive column27may be fastened on the engine base23by means of welding, where by means of welding, heat resistance for heat dissipation can be reduced, and heat dissipation can be speeded up. The thermally conductive column27may also be fixedly connected by means of gluing or in an interference fitting manner.

Herein, it should be noted that inFIG. 2, the thermally conductive column27further needs to penetrate through insulation sheets between an upper end face of the body21and the coil22and between a lower end face of the body21and the coil22.

A way of heat dissipation inFIG. 2is to transfer heat to the engine base23mainly through multiple thermally conductive columns27in time, and then to transfer the heat to the fan base26, the support bracket25, and the like, where heat dissipation efficiency of the way of heat dissipation depends on heat transfer efficiency of the thermally conductive columns27. Therefore, in this case, the engine base23may be fixedly connected to the fan base26. Heat dissipation may also be implemented using a thermally conductive structure shown inFIG. 3, and details are as follows.

InFIG. 3, the thermally conductive structure includes two ring-shaped first thermally conductive brackets31, where the two first thermally conductive brackets31are respectively located on the upper end face and the lower end face of the body21of the stator, and the coil22is wound around the two first thermally conductive brackets31and the body21in a manner in the prior art, as shown inFIG. 3. It can be learned from this that heat generated in an operating process of the coil22is transferred to the body21mainly through the coil22, and then is transferred, through the body21, to the first thermally conductive bracket31located at a lower end of the body21, and further is transferred to the engine base23fixedly connected to the first thermally conductive bracket31at this end. Some heat is directly transferred to the first thermally conductive bracket31through the coil22, and then is transferred to the engine base23through the first thermally conductive bracket31at the lower end of the body31. InFIG. 3, the body21may be of a cylindrical structure, and the first thermally conductive bracket31may be set to a circular ring matching a shape of the body21.

Finally, the heat can be transferred, through the engine base23, to the fan base26fixedly connected to the engine base23. InFIG. 3, the heat in the fan base26can be further dissipated through the support bracket25, and inFIG. 3, a direction of an arrow is a flow direction of airflow generated when the cooling fan is operating. It can be learned from this that the airflow can draw away heat in the support bracket25and the fan base26, thereby achieving an objective of fast heat dissipation.

A material, for example, metal and ceramic, having a good heat-conducting property may be selected for all of the engine base23, the fan base26, and the support bracket25. A heat sink fin may be additionally disposed on the support bracket25, so as to improve a heat dissipation capability of the support bracket25. The engine base23and the fan base26may be two parts and be fixedly connected by means of welding, in an interference fitting manner, or the like; or the engine base23and the fan base26may be disposed integrally to shorten a heat transfer path. In this embodiment, heat is transferred mainly through the first thermally conductive bracket31located at the lower end of the body21; therefore, in order to effectively shorten a heat transfer path, the engine base23and the fan base26are disposed integrally to speed up heat dissipation.

When the first thermally conductive bracket31located at the lower end of the body21is fastened on the engine base23in a connection manner using a screw or in a matching manner by means of gluing, because the coil22is also wound around the first thermally conductive bracket31, the coil22in a lower end area is in contact with the engine base23. Therefore, still some heat generated by the coil22can be directly transferred to the engine base23, thereby improving heat dissipation efficiency of the coil22in multiple ways of heat dissipation.

In order to further improve heat transfer efficiency of the first thermally conductive bracket31located at the lower end of the body21, a thermally conductive material may be filled between the first thermally conductive bracket31at the lower end and the engine base23without preventing the first thermally conductive bracket31at this end from being fastened to the engine base23. In addition, a thermally conductive material may also be filled between the coil22and the engine base23, so as to facilitate fast heat transfer. The first thermally conductive bracket31may use an AlN ceramic material having a quite high heat-conducting property.

In order to further ensure connective stability between the first thermally conductive bracket31and the engine base23, as shown inFIG. 4, multiple cylindrical objects41that are evenly and equidistantly arranged may be disposed on the first thermally conductive bracket31at the lower end of the body31in a direction parallel to a center line of the body31, where the cylindrical objects41penetrate through the engine base23and are fixedly connected to the engine base23. In addition, these cylindrical objects41can further play a role of heat transfer.

Herein, it should be noted that inFIG. 3, the first thermally conductive brackets31located at the upper end face and the lower end face of the body21may also be directly used as insulation sheets for use; in this case, the first thermally conductive bracket31located at an upper end of the body21can also transfer heat, where this part of heat can be dissipated through a gap between the stator and a rotor. The first thermally conductive bracket31may be disposed at the lower end of the body21, and an insulation sheet structure may be still used at the upper end.

InFIG. 3, a manner of shortening a heat transfer path is used, that is, the engine base23and the fan base26are disposed integrally, which may reduce an overall thickness and facilitate fast transfer of heat to a support bracket and the like. This manner is easy to implement and is effective. In this case, the engine base23may also be referred to as the fan base26or a base.

When a magnetic motor is applied, a main heat source is the coil22; therefore, heat dissipation efficiency of the coil22may be improved by directly changing a structure of the coil22. Details are shown inFIG. 5.

InFIG. 5, the coil22includes multiple metal strips that are of a bar-shaped structure and that are disposed at intervals, and the thermally conductive structure is an interconnection board51disposed between the stator and the engine base23, where the interconnection board51is fixedly connected to the engine base23. Compared with a conventional winding coil22, for the coil22including the metal strips, in a case of a same perimeter, the metal strip has a large section area and small resistance; therefore, the metal strip has a strong downward heat conducting capability and produces less heat. Each metal strip includes two plates65parallel to each other, where the two plates65are respectively attached to an inner side wall and an outer side wall of the body21, first ends of the two plates65are connected, and second ends thereof implement an electrical connection using a circuit inside the interconnection board51, such that the metal strip and the circuit inside the interconnection board51jointly form an electrically conductive path of the coil22.

Pads may be disposed on an upper surface of the interconnection board51, and the second ends of the two plates65are provided with extending ends fixedly connected to the pads, where the pads and the extending ends are disposed in a one-to-one corresponding manner, that is, each metal strip includes two extending ends, and the two extending ends are each corresponding to one pad, and the two extending ends are not directly connected. The two extending ends of each metal strip are oppositely disposed at intervals, such that each metal strip forms a “”-shaped structure. The plates65may be vertically disposed, and the extending ends are perpendicular to the plates65and are horizontally disposed. InFIG. 5, the pads may be fastened on the interconnection board51in an electroplating manner or a hot pressing manner; the interconnection board is further internally provided with a circuit in communication with the pads, where the circuit may be disposed inside the interconnection board51in an electroplating manner or a hot pressing manner, and is connected to the pads by means of welding, so as to facilitate a connection to the metal strips.

When the two plates65are respectively attached to the inner side wall and the outer side wall of the body21, an end part at which the two plates65are connected fits a top end face of the body21; in this case, it is required that a length of the end part (a distance between the two plates65) be in conformity with the thickness of the body21. InFIG. 5, the body21may be of a cylindrical structure, the interconnection board51may be a hollow disc-shaped structure, and an outer diameter of the interconnection board51is greater than a diameter of the body21, such that the interconnection hoard51bears the body21and is fixedly connected to the extending ends. InFIG. 5, each metal strip is fastened on the body21in the foregoing manner; in addition, the multiple metal strips are evenly and equidistantly arranged in a circumferential direction of the body21. There are multiple manners of arranging the multiple metal strips on the body21, and the manner inFIG. 5is an arrangement manner that is relatively proper and relatively neat in appearance.

After attachment of the metal strips is complete, each metal strip is in communication with the circuit using pads of the metal strip, such that all the metal strips and the circuit can jointly form an electrically conductive path of the coil, thereby facilitating a connection to an external power source. The circuit inside the interconnection board51needs to be arranged according to a wiring requirement of the electrically conductive path of the coil. The interconnection board51may be fastened on the engine base23by means of gluing, and a material of the interconnection board51may be an AlN ceramic material.

The two plates65are respectively attached to an inner side face and an outer side face of a side wall of the body21, and then the extending ends are fastened on the pads by means of welding, thereby completing fastening of the coil22. It can be learned from this that heat generated by the coil22is directly transferred to the pads mainly through the coil22, then is transferred to the interconnection board51through the pads, and further is transferred to the engine base23through the interconnection board51. When the extending ends of the metal strips are welded to the pads, due to existence of solder, the metal strips may also transfer the heat to the interconnection board through the solder, thereby speeding up dissipation of the heat of the coil22.

Finally, the heat can be transferred, through the engine base23, to the fan base26fixedly connected to the engine base23. InFIG. 5, the heat in the fan base26can be further dissipated through the support bracket25, and inFIG. 5, a direction of an arrow is a flow direction of airflow generated when the cooling fan is operating. It can be learned from this that the airflow can draw away heat in the support bracket25and the fan base26, thereby achieving an objective of fast heat dissipation.

A material, for example, metal and ceramic, having a good heat-conducting property may be selected for all of the engine base23, the fan base26, and the support bracket25. A heat sink fin may be additionally disposed on the support bracket25, so as to improve a heat dissipation capability of the support bracket25. The engine base23and the fan base26may be two parts and be fixedly connected by means of welding, in an interference fitting manner, or the like; or the engine base23and the fan base26may be disposed integrally to shorten a heat transfer path. In this embodiment, the heat is transferred mainly through the interconnection board51; therefore, in order to effectively shorten a heat transfer path, the engine base23and the fan base26are disposed integrally to speed up heat dissipation.

InFIG. 5, in order to develop a way of heat dissipation of the coil22, that is, to dissipate some heat through the body21, second thermally conductive brackets52may also be disposed on the upper end face and the lower end face of the body21, where the second thermally conductive bracket52may be of a circular ring structure matching the body21. An upper end face of the second thermally conductive bracket52located at the lower end of the body21is fixedly connected to a bottom end face of the body21, and a lower end face thereof is in contact with and/or is connected to the interconnection board51, such that some heat of the coil22can be transferred, through the body21, to the second thermally conductive bracket52located at the lower end of the body21, then is transferred to the interconnection board51through the second thermally conductive bracket52, and further is transferred to the engine base23and the like; therefore, the heat is fast dissipated. In addition, because the metal strip is fastened in an attachment manner, a bottom part (the second ends of the plates65) of the metal strip is further in contact with a side surface of the second thermally conductive bracket52located at a bottom end of the body21, developing a heat transfer path.

Herein, it should be noted that the second thermally conductive brackets52may replace the insulation sheets at the upper end face and the lower end face of the body21. InFIG. 5, a manner of shortening a heat transfer path is used, that is, the engine base23and the fan base26are disposed integrally, which may reduce an overall thickness and facilitate fast transfer of heat to a support bracket and the like. This manner is easy to implement and is effective. In this case, the engine base23may also be referred to as the fan base26or a base.

Generally, compared with a side stand magnetic motor in the prior art, heat dissipation efficiency of the side stand magnetic motor can be effectively improved using the thermally conductive structure shown inFIG. 2toFIG. 5, where motor power density can be increased by 60 percent (%) using the thermally conductive structure shown inFIG. 2, and motor power density can be increased by 100% using the thermally conductive structure shown inFIG. 3toFIG. 5. Therefore, the side stand magnetic motor has high practicality.

An embodiment of the present disclosure further provides a cooling fan, including a fan frame, a fan base fixedly connected to the fan frame using a support bracket, and a fan blade, and further including the side stand magnetic motor that is described in the foregoing embodiment and that is configured to drive the fan blade to rotate, where an engine base of the side stand magnetic motor is fixedly connected to the fan base.

According to the cooling fan further provided in this embodiment of the present disclosure, the side stand magnetic motor described in the foregoing embodiment is used, where the side stand magnetic motor includes a stator formed by a tubular body and a coil disposed on the body, the stator is fastened on an engine base of the side stand magnetic motor, a thermally conductive structure made of a thermally conductive material is disposed on the stator, and the thermally conductive structure is in contact with and is connected to the engine base. It can be learned through analysis that a thermally conductive structure made of a heat transfer material is disposed on a body and/or a coil, allowing heat generated in an operating process of the coil to be transferred to the thermally conductive structure through the coil and/or the body; then the heat is transferred to an engine base that is in contact with and that is connected to the thermally conductive structure. Because the thermally conductive structure is made of the heat transfer material and has a good heat-conducting property, it can be ensured that the heat generated by the coil is effectively transferred to the engine base through the thermally conductive structure in time, thereby dissipating the heat into air through the engine base in time, which meets a heat dissipation requirement of the side stand magnetic motor, increases power density of the side stand magnetic motor, and features high practicality.

The engine base may be fixedly connected to the fan base by means of welding or in an interference fitting manner, or the engine base and the fan base are of an integrally formed structure, where if the latter structure is selected, a heat transfer path can be shortened. A different connection structure for the engine base and the fan base may be selected according to a different thermally conductive structure of the side stand magnetic motor. This selection manner is widely used and has been described in the foregoing embodiment; therefore, details are not described herein again.

Further, a heat sink fin structure may be disposed on the support bracket, so as to speed up heat dissipation at a location of the support bracket, and improve overall heat dissipation efficiency. The heat sink fin structure may be disposed according to a need.

FIG. 6shows a cooling fan61using a side stand magnetic motor62.

In the descriptions of the present disclosure, it should be understood that orientations or position relationships indicated by terms “center”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, and the like are orientations or position relationships shown in the accompanying drawings, which are not intended to indicate or imply that the described apparatus or component shall have a particular orientation or be constructed or operated in a particular orientation, but are merely for ease of description of the present disclosure and for brevity of description, which, therefore, shall not be construed as a limitation on the present disclosure.

Terms “first” and “second” are merely used for description, but shall not be construed as an indication or implication of relative importance or as an implication of a quantity of technical features. Therefore, features limited by “first” and “second” may indicate or imply that one or more features are included. In the descriptions of the present disclosure, unless otherwise specified, “multiple” means two or more than two.

In the descriptions of the present disclosure, it should be noted that terms “install”, “link”, and “connect” should be understood broadly unless otherwise expressly provided and limited; for example, being fixedly connected, detachably connected, or integrally connected, being mechanically connected or electrically connected, being directly linked, being indirectly linked using a medium, or being communicated within two components may be possible. A person of ordinary skill in the art may understand specific meanings of the foregoing terms in the present disclosure in the light of the specific circumstances.

In the descriptions of this specification, specific features, structures, materials, or characteristics may be combined in any one or more embodiments or examples in a proper manner.