Radiator fan brushless motor

Abstract

This invention relates to the field of motor heat dissipation technology, specifically to a brushless motor for a radiator fan. The motor includes a housing and a motor. Several slots for inserting heat dissipation fins are located at the bottom of the housing. The motor is installed inside the housing, with a fan connected to one end. The slots are located on the fan's air inlet side. Inside the housing, from the inside out, are a first vent and a second vent, with the outlet of the second vent facing the fan's air inlet side. This invention, by setting two independent but interconnected vents (first and second vents) and placing the first vent around the motor, allows some of the blown air to enter the first vent when the motor drives the fan to dissipate heat from the components connected to the housing. This circulates the air within the first vent, achieving heat dissipation for the motor and reducing the risk of motor damage due to prolonged cyclical use.

Description

Technical Field

[0001] This invention relates to the field of motor heat dissipation technology, specifically to a brushless motor for a radiator fan. Background Technology

[0002] In the existing technology, the brushless motor of the radiator fan has poor heat dissipation function, and there is a risk of motor damage due to long-term cyclic use. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the present invention provides a brushless motor for radiator fans, which can effectively solve the risk of motor damage caused by long-term cyclic use in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] The present invention provides a brushless motor for a radiator fan, including a housing, and a plurality of slots for inserting heat dissipation fins are provided at the bottom of the housing;

[0006] An electric motor is installed inside a housing, with a fan connected to one end, and the slot is located on the air inlet side of the fan.

[0007] The housing contains a first ventilator and a second ventilator arranged sequentially from the inside to the outside. The outlet of the second ventilator faces the air inlet of the fan. The motor is located inside the first ventilator. A ventilation channel is provided between the first ventilator and the air outlet of the fan to guide a portion of the air blown out by the fan into the first ventilator.

[0008] Furthermore, an air passage is provided on the outer wall of the first ventilator on the side away from the fan, and the air passage is connected to the second ventilator.

[0009] Furthermore, the first vent also includes heat sinks, which are provided in multiple pieces and regularly arranged inside the first vent, with one side of each heat sink attached to the outer end of the motor.

[0010] Furthermore, the air inlet of the ventilation duct faces the air outlet of the fan, and its air outlet extends from above the first ventilation cylinder into the first ventilation cylinder.

[0011] Furthermore, a guide plate is provided on one side of the air inlet of the ventilation duct, including a connecting part and a bending part. One end of the connecting part is installed on one side of the air inlet of the ventilation duct and is inclined towards the direction of the fan from the direction of connection with the ventilation duct. The bending part is provided at the end of the connecting part and is bent towards the direction of the ventilation duct.

[0012] Furthermore, the air inlet of the ventilation duct has a sliding cavity along the direction of the fan's airflow, and one side of the connecting part is guided to slide in the sliding cavity and can block the air inlet.

[0013] Furthermore, the air guide plate also includes wing plates, which are symmetrically arranged on both sides of the air guide plate, with the end facing the fan outlet inclined towards the fan direction from the connection point with the air guide plate.

[0014] Furthermore, a thermal expansion ring is provided inside the sliding cavity, with one end of the thermal expansion ring facing the end of the air guide plate away from the fan.

[0015] The technical solution provided by this invention has the following advantages compared with known public technologies:

[0016] This invention provides a cooling function for the motor by setting up two independent but interconnected air vents, namely a first vent and a second vent. The first vent is fitted over the outside of the motor. When the motor drives the fan to work and dissipates heat from the components connected to the housing, some of the blown air enters the first vent, circulating the air inside and carrying away the heat generated by the motor. The air then circulates into the second vent and is discharged, thus reducing the risk of motor damage caused by prolonged cyclic use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0019] Figure 2 This is a bottom view of the overall structure in an embodiment of the present invention;

[0020] Figure 3 This is a partial cross-sectional view of the structure in an embodiment of the present invention;

[0021] Figure 4 As described in the embodiments of the present invention Figure 3 Schematic diagram of the structure at point A in the middle;

[0022] Figure 5 This is a schematic diagram of the side cross-sectional structure of the ventilation duct in an embodiment of the present invention;

[0023] Figure 6 This is a side cross-sectional view of the ventilator in an embodiment of the present invention;

[0024] Figure 7 This is a top view cross-sectional structural diagram of the first ventilator in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the heat sink structure in an embodiment of the present invention.

[0026] The labels in the diagram represent: 1. Housing; 11. Slot; 2. Motor; 3. Fan; 4. First vent; 41. Ventilation duct; 411. Air guide plate; 412. Connecting part; 413. Bending part; 414. Wing plate; 42. Heat sink; 43. Air vent; 44. Sliding cavity; 441. Thermal expansion ring; 5. Second vent. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] The present invention will be further described below with reference to embodiments.

[0029] Example: Refer to Figure 1-8 A brushless motor for a radiator fan includes a housing 1. Several slots 11 for inserting heat dissipation fins are provided at the bottom of the housing 1. By inserting heat dissipation fins into the slots 11, contact cooling of the heat dissipation body is achieved, and the heat dissipated by the heat dissipation body is conducted through the heat dissipation fins. A motor 2 is installed inside the housing 1, and one end of the motor 2 is connected to a fan 3. The slots 11 are located on the air intake side of the fan 3. The fan 3 carries away the hot air from the heat dissipation fins to achieve the cooling effect. In this example, the type and power of the motor 2 are not limited, and it is only used as a driving structure for the fan 3.

[0030] In this example, motor 2 is installed at the very center of housing 1, which has a cylindrical structure. The wiring structure of motor 2 is a known prior art and will not be described in detail here.

[0031] Two cylindrical vents, the first vent 4 and the second vent 5, are located in the cavity inside the housing 1. They are both arranged concentrically with the housing 1 and the motor 2. In this example, the upper end of the first vent 4 is provided with a cap, which is fitted over the outside of the shaft connecting the motor 2 and the fan 3. The amount of air entering is relatively small, and a flow area for airflow is formed inside the first vent 4. The gap between the first vent 4 and the second vent 5 forms a flow area for airflow to flow out.

[0032] Five L-shaped ventilation channels 41 are provided around the perimeter of the casing 1. The ventilation channels 41 are hollow inside, with the concave surface facing the direction of the fan 3. One end of the ventilation channel 41 extends into the upper part of the first ventilation cylinder 4, so that the air circulating from the air outlet of the fan 3 returns to it through the ventilation channel 41, and conducts heat to the perimeter of the motor 2 located in the first ventilation cylinder 4. Several air passage holes 43 are provided on the outside of the first ventilation cylinder 4 and on the side away from the fan 3. The air passage holes 43 are arranged along the circumference of the first ventilation cylinder 4. The air in the first ventilation cylinder 4 will be transferred to the second ventilation cylinder 5 through the air passage holes 43. The air outlet of the second ventilation cylinder 5 is directly opposite the air inlet side of the fan 3. Thus, the air blown out from the second ventilation cylinder 5 will be driven away by the fan 3, realizing the heat circulation process around the motor 2.

[0033] Multiple heat sinks 42 are inserted inside the first ventilator 4. The heat sinks 42 are arranged along the circumference of the first ventilator 4, and each heat sink 42 is in contact with the outer wall of the motor 2. The heat from the surface of the motor 2 is conducted through the heat sinks 42 in a timely manner, and the heat is circulated by the blown air and transferred to the second ventilator 5 through the air passage 43.

[0034] A sliding cavity 44 is provided at the air inlet of the ventilation duct 41. The sliding cavity 44 is inclined downwards towards the direction of the fan 3. A guide plate 411 that can slide inside the sliding cavity 44 is provided. In this example, the air inlet of the ventilation duct 41 is perpendicular to the opening direction of the sliding cavity 44. The guide plate 411 is specifically composed of a connecting part 412, a bending part 413 and a wing plate 414. The connecting part 412 is inclined towards the direction of the fan 3 from the direction of connection with the ventilation duct 41. Its side facing the sliding cavity 44 slides inside the sliding cavity 44. When the connecting part 412 is attached to the other end of the air inlet (the corresponding surface of the sliding cavity 44) due to gravity, the air inlet is blocked, and the amount of air entering the ventilation duct 41 through the air inlet is reduced or not at all. The extension line of the connecting part 412 forms an angle of approximately 135 degrees with the direction of the middle part of the fan 3.

[0035] The bending part 413 is connected to the side of the connecting part 412 near the fan 3. The bending part 413 is nearly parallel to the air inlet and has an angle of about 15 degrees with the connecting part 412. The air blown out from the fan 3 will hit the bending part 413 immediately. When the connecting part 412 does not block the air inlet, the air will be guided into the ventilation duct 41 by the bending part 413.

[0036] Specifically, a sliding rod is inserted on each side of the sliding cavity 44 along its width direction, and the two sides of the connecting part 412 are guided and slid on the two sliding rods. The sliding structure is not limited again, and the air inlet is blocked by the part connected to the rear side of the connecting part 412.

[0037] The greater the motor power, the stronger the wind force, and the greater the wind force received by the bending part 413, which in turn drives the connecting part 412 to move, increasing the distance between the connecting part 412 and the air inlet, thereby increasing the air volume entering the ventilation duct 41. When the motor power is normal, the wind force received by the bending part 413 is small, which is insufficient to allow the connecting part 412 to move a large enough range, resulting in a small air volume entering the ventilation duct 41. The air that does not enter the ventilation duct 41 will be blown away from the side of the air guide plate 411. Optionally, a temperature sensing sensor can be set here and connected to the controller that controls the motor power output. When the temperature is high, the output power of the motor is increased, thereby increasing the air volume.

[0038] A wing plate 414 is connected to each side of the bending part 413. The wing plates 414 are symmetrically arranged on both sides of the bending part 413. The end of the wing plate 414 facing the air outlet of the fan 3 is inclined towards the fan 3 from the connection with the air guide plate 411, which increases the contact area with the air blown out by the fan 3, allowing the air to be guided into the ventilation duct 41. Since the air guide plate 411 is located close to the inner edge of the housing 1, it will not block too much airflow.

[0039] A thermal expansion ring 441 that can expand under heat is provided inside the sliding cavity 44. One end of the thermal expansion ring 441 is directly opposite the end of the air guide plate 411 away from the fan 3. When the heat inside the equipment is too high, the thermal expansion ring 441 will expand and press against one side of the sliding part of the connecting part 412 in the sliding cavity 44, restricting the movement of the connecting part 412, preventing the air outlet from being too large, limiting the air volume, and preventing the hot air from weakening the heat dissipation effect on the motor 2. The temperature sensing sensor mentioned above can be set to a certain temperature threshold, which is lower than the expansion point of the thermal expansion ring 441. Therefore, the expansion of the thermal expansion ring 441 does not affect the effect of increasing the heat dissipation effect by increasing the motor power. This is the prior art, and it will not be elaborated on in this example.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A brushless motor for a radiator fan, characterized in that, include: The housing has several slots at the bottom for inserting heat dissipation fins; An electric motor is installed inside a housing, with a fan connected to one end, and the slot is located on the air inlet side of the fan. The housing contains a first ventilator and a second ventilator arranged sequentially from the inside to the outside. The outlet of the second ventilator faces the air inlet of the fan. The motor is located inside the first ventilator. An air passage is provided on the outer wall of the first ventilator on the side away from the fan, and the air passage communicates with the second ventilator; A ventilation duct is provided between the first ventilation cylinder and the air outlet of the fan. The air inlet of the ventilation duct faces the air outlet of the fan, and its air outlet extends from above the first ventilation cylinder into the first ventilation cylinder. An air guide plate is provided on one side of the air inlet of the ventilation duct, including: The connecting part has one end installed on one side of the air inlet of the ventilation duct and is inclined towards the direction of the fan from the direction of connection with the ventilation duct. A bending portion is provided at the end of the connecting portion and bends toward the ventilation duct; A sliding cavity is provided at the air inlet of the ventilation duct, and the connecting part slides within the sliding cavity and can cover and block the air inlet. The air guide plate also includes: The wing plates are symmetrically arranged on both sides of the air guide plate, with the end facing the fan outlet inclined towards the fan direction from the connection point with the air guide plate. The sliding cavity is equipped with a thermal expansion ring, which is located at the end of the air guide plate away from the fan.

2. The brushless motor for a radiator fan according to claim 1, characterized in that, The ventilation holes are provided in a plurality of manner and are arranged at intervals along the circumference of the first ventilation cylinder.

3. A brushless motor for a radiator fan according to claim 1, characterized in that, The first vent is equipped with multiple heat sinks, with one side of each heat sink attached to the outer end of the motor.

4. A brushless motor for a radiator fan according to claim 1, characterized in that, The ventilation ducts are configured as five and arranged along the periphery of the housing, and the ventilation ducts are L-shaped with the concave surface facing the fan.

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