A high-frequency inductor embedded in a heat sink

Abstract

The present invention discloses a high-frequency inductor embedded in a heat sink, comprising a support crossbar and an inductor coil. The inductor is characterized in that: a first winding bobbin, and movable second and third winding bobbins are provided on the support crossbar; the inductor coil is sequentially wound around the second, first, and third winding bobbins; a drive mechanism for driving the first and third winding bobbins is provided below the support crossbar; a cooling fan is provided below the drive mechanism; a film-type temperature sensor is installed between the first winding bobbin and the support crossbar; the inductor further comprises a controller for controlling the cooling fan and the drive mechanism; the temperature sensor is connected to the controller. The inductor coil is divided into several sections. When the temperature of the inductor coil is too high, the spacing between the sections of the inductor coil is adjusted, exposing the middle section and inner portion of the inductor coil to air. This, combined with the cooling fan, achieves a better heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the field of electronic and electrical technology, and more particularly to a high-frequency inductor embedded in a radiator. Background Art

[0002] An inductor is a component that converts electrical energy into magnetic energy and stores it. Its structure is similar to a transformer, but with a single winding. An inductor has a certain inductance, which simply blocks changes in current. If no current flows through the inductor, it will attempt to block current flow when the circuit is connected. If current flows through the inductor, it will attempt to maintain the current flow when the circuit is disconnected. Inductors are also called chokes, reactors, and dynamic reactors.

[0003] High-frequency inductors generate a large amount of heat during operation. If the heat cannot be discharged in time, it is easy to cause the internal temperature of the inductor to be too high. The high temperature will not only limit the increase in the power density of the high-frequency inductor, but may also cause damage to the high-frequency inductor.

[0004] Currently, high-frequency inductors on the market generally come with cooling fans. By detecting the temperature of the high-frequency inductor, the cooling fan is started to actively dissipate heat and cool down when the temperature is too high. The cooling fan blows air toward the heat-conducting shell or inductor coil of the high-frequency inductor, thereby achieving the purpose of heat dissipation and cooling.

[0005] However, the heat of high-frequency inductors is mainly generated by the inductor coil, and the inductor coil is wound relatively densely. The heat in the middle and inside of the coil is not easy to dissipate, which can easily cause local high temperature. It is difficult to effectively blow air to cool the middle and inside of the inductor coil through existing heat dissipation and cooling methods, and its heat dissipation effect needs to be improved. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention aims to provide a

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A high-frequency inductor embedded in a radiator, comprising a supporting crossbar and an inductor coil, wherein two sets of side support frames are symmetrically fixed at both ends of the supporting crossbar, and a first winding bobbin, a second winding bobbin, and a third winding bobbin are provided on the supporting crossbar, wherein the first winding bobbin is fixedly sleeved on the supporting crossbar, and the second winding bobbin and the third winding bobbin are respectively located on both sides of the first winding bobbin, and the second winding bobbin and the third winding bobbin are movably sleeved on the supporting crossbar, and the inductor coil is sequentially wound on the second winding bobbin, the first winding bobbin, and the third winding bobbin. The head end of the coil is connected to the first terminal, and the tail end of the inductor coil is connected to the second terminal. The wire body of the inductor coil is located between adjacent winding drums with a length margin. A driving mechanism for driving the first winding drum and the third winding drum to move is provided below the supporting cross bar. A cooling fan is provided below the driving mechanism. A film temperature sensor is installed between the first winding drum and the supporting cross bar. The inductor also includes a controller for controlling the cooling fan and the driving mechanism. The temperature sensor is connected to the sampling signal input end of the controller.

[0009] As a preferred solution: the driving mechanism includes a driving motor, a screw and a threaded sleeve. The housing of the driving motor is connected and fixed to the side support frame through an upper connecting plate. The screw is arranged vertically and is coaxially connected to the output shaft of the driving motor. A threaded sleeve is provided on the screw, and the threaded sleeve is threadedly matched with the screw. The lower parts of the first winding reel and the third winding reel are both fixed with connecting blocks. The two groups of connecting blocks are respectively connected to the threaded sleeves through two groups of connecting rods, and the two groups of connecting rods are in an inverted "eight" shape.

[0010] As a preferred solution: the support cross bar and the side support frame are both hollow structures, the interior of the support cross bar is connected to the interior of the side support frame, the interior of the support cross bar and the side support frame are filled with heat-conducting liquid, and the winding drum, support cross bar and side support frame are all made of heat-conducting materials.

[0011] As a preferred solution: thermal conductive grease is applied between the first winding bobbin and the supporting cross bar, and between the third winding bobbin and the supporting cross bar.

[0012] As a preferred solution: multiple groups of heat dissipation fins are provided on the inner and outer surfaces of the side support frame.

[0013] As a preferred solution: a horizontal annular frame is provided below the driving mechanism, the annular frame is connected and fixed to the side support frame, the housing of the cooling fan is located in the annular frame, the blades of the cooling fan are located above the annular frame, the housing of the cooling fan is rotatably connected to the annular frame, a counterweight block and a first magnet block are fixed at both ends of the blades of the cooling fan, the weight of the counterweight block and the first magnet block are equal, and the configuration block and the first magnet block are symmetrically distributed at both ends of the blade, a second magnet block is provided above the path of the first magnet block rotating with the blade, the second magnet block is connected and fixed to the threaded sleeve through a connecting piece, and the second magnet block and the first magnet block attract each other.

[0014] As a preferred solution: a limiting ring is coaxially arranged below the annular frame, the limiting ring is connected and fixed to the annular frame, the inner diameter of the limiting ring is smaller than the inner diameter of the annular frame, and a swing rod is coaxially fixed to the bottom of the cooling fan housing, and the swing rod extends downward into the limiting ring.

[0015] As a preferred solution: an elastic buffer pad is coaxially fixed on the inner wall of the limiting ring.

[0016] As a preferred solution: the controller compares the temperature value detected by the temperature sensor with a preset first temperature value and a second temperature value, where the second temperature value is greater than the first temperature value. When the detected temperature value is less than the first temperature value, the controller controls the cooling fan and the drive motor not to operate; when the detected temperature value is greater than the first temperature value and less than the second temperature value, the controller controls the cooling fan to start; when the detected temperature is greater than the second temperature value, the controller controls the drive motor to rotate, and at this time the drive motor drives the first winding bobbin and the second winding bobbin to move away from each other.

[0017] As a preferred solution: a third temperature value is also preset, and the third temperature value is greater than the second temperature value. When the detected temperature value is greater than the third temperature value, the controller controls the drive motor to rotate forward and reverse periodically, thereby driving the threaded sleeve to rise and fall periodically.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] The inductor divides the inductor coil into several sections. When the inductor is working, the temperature sensor can detect the temperature of the inductor coil in real time and feed the temperature detection results back to the controller. When the temperature of the inductor coil is too high, the controller controls the driving mechanism to adjust the spacing between the various sections of the inductor coil, exposing the middle section and internal parts of the inductor coil to the air. This is beneficial to heat dissipation in the internal and middle parts of the inductor coil. Combined with the blowing of the cooling fan, it can achieve a better heat dissipation effect, allowing the high-frequency inductor to dissipate heat and cool down more quickly when high temperatures are generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the overall structure of the high-frequency inductor in this embodiment;

[0021] Figure 2 for Figure 1 A magnified view of part A in FIG;

[0022] Figure 3 for Figure 1 A magnified view of part B in FIG;

[0023] Figure 4 This is a control principle diagram in this embodiment.

[0024] Explanation of the accompanying drawings: 1. Support cross bar; 2. Side support frame; 3. First winding drum; 4. Second winding drum; 5. Third winding drum; 6. Inductor coil; 7. First terminal; 8. Second terminal; 9. Thermal fluid; 10. Upper connecting plate; 11. Drive motor; 12. Screw; 13. Threaded sleeve; 14. Connecting block; 15. Connecting rod; 16. Cooling fan; 17. Blade; 18. Lower connecting plate; 19. Ring frame; 20. Rotating shaft; 21. Fixed rod; 22. Limiting ring; 23. Buffer pad; 24. Swinging rod; 25. Counterweight; 26. First magnet block; 27. Connecting piece; 28. Second magnet block. DETAILED DESCRIPTION

[0025] Reference Figure 1 A high-frequency inductor embedded in a radiator includes a supporting crossbar 1 and an inductor coil 6. Two sets of side support frames 2 are symmetrically fixed at both ends of the supporting crossbar 1. A first winding bobbin 3, a second winding bobbin 4 and a third winding bobbin 5 are arranged on the supporting crossbar 1, wherein the first winding bobbin 3 is fixedly sleeved on the supporting crossbar 1 so that its position cannot be moved, the second winding bobbin 4 and the third winding bobbin 5 are respectively located on both sides of the first winding bobbin 3, and the second winding bobbin 4 and the third winding bobbin 5 are movably sleeved on the supporting crossbar 1 so that the second winding bobbin 4 and the third winding bobbin 5 can move along the length direction of the supporting crossbar 1.

[0026] The inductor coil 6 is wound on the second winding drum 4, the first winding drum 3 and the third winding drum 5 in sequence. The head end of the inductor coil 6 is connected to the first terminal 7, and the tail end of the inductor coil 6 is connected to the second terminal 8. The wire body of the inductor coil 6 between adjacent winding drums has a length margin to ensure that the first winding drum 3 and the second winding drum 4 can move freely. A driving mechanism for driving the first winding drum 3 and the third winding drum 5 to move is provided below the supporting cross bar 1.

[0027] The surface of the inductor coil 6 is coated with insulating paint to provide insulation.

[0028] The driving mechanism in this embodiment includes a driving motor 11, a screw rod 12 and a threaded sleeve 13. The housing of the driving motor 11 is connected and fixed to the side support frame 2 through an upper connecting plate 10. The screw rod 12 is arranged vertically and is coaxially connected to the output shaft of the driving motor 11. A threaded sleeve 13 is sleeved on the screw rod 12, and the threaded sleeve 13 is threadedly matched with the screw rod 12. Connecting blocks 14 are fixed to the lower parts of the first winding drum 3 and the third winding drum 5. The two groups of connecting blocks 14 are respectively connected to the threaded sleeve 13 through two groups of connecting rods 15. The two groups of connecting rods 15 are in an inverted "eight" shape.

[0029] When the driving motor 11 drives the screw rod 12 to rotate forward, it drives the threaded sleeve 13 to rise, and then drives the two sets of connecting rods 15 to drive the first winding drum 3 and the second winding drum 4 away from each other, thereby increasing the distance between the three groups of winding drums; when the driving motor 11 drives the screw rod 12 to rotate reversely, it drives the threaded sleeve 13 to descend, and then drives the first winding drum 3 and the second winding drum 4 closer to each other, thereby reducing the distance between the three groups of winding drums.

[0030] A cooling fan 16 is provided below the driving mechanism and is fixedly connected to the side support frame 2 via a lower connecting plate 18 .

[0031] Reference Figure 2 A film temperature sensor is installed between the first winding drum 3 and the supporting cross bar 1. The inductor also includes a controller for controlling the cooling fan 16 and the drive motor 11. The temperature sensor is connected to the sampling signal input end of the controller, and the control signal output end of the controller is connected to the cooling fan 16 and the drive motor 11.

[0032] The working principle of the inductor is as follows: when the inductor coil 6 is energized to generate heat and its temperature rises, the temperature sensor can detect the temperature of the inductor coil 6 in real time and feed the temperature detection result back to the controller. The controller compares the detected temperature value with a first temperature value and a second temperature value preset, wherein the second temperature value is greater than the first temperature value. When the detected temperature value is less than the first temperature value, the controller does not send a control signal to the cooling fan 16 and the drive motor 11, and the cooling fan 16 and the drive motor 11 do not operate. When the detected temperature value is greater than the first temperature value and less than the second temperature value, the controller controls the cooling fan 16 to start, while the drive motor 11 does not operate. When the detected temperature value is greater than the first temperature value and less than the second temperature value, the controller controls the drive motor 11 to rotate, and the drive motor 11 drives the first winding bobbin 3 and the second winding bobbin 4 away from each other, thereby increasing the distance between adjacent winding bobbins. The larger distance is conducive to heat dissipation in the interior and middle part of the inductor coil 6, and combined with the air blowing from the cooling fan 16, it can achieve a better heat dissipation effect, so that the high-frequency inductor can dissipate heat and cool down more quickly when high temperature is generated.

[0033] When the detected temperature drops back to between the first temperature value and the second temperature value, the controller controls the drive motor 11 to rotate in the opposite direction, thereby driving the first winding reel 3 and the third winding reel 5 to approach each other until they are reset; when the detected temperature drops back to below the first temperature value, the controller controls the cooling fan 16 to stop running.

[0034] like Figure 1 As shown, the support crossbar 1 and the side support frames 2 in this embodiment are both hollow structures, the interior of the support crossbar 1 is connected to the interior of the side support frames 2, and a heat transfer fluid 9 is installed inside the support crossbar 1 and the side support frames 2. The winding bobbin, the support crossbar 1 and the side support frames 2 are all made of heat-conducting materials. The heat generated by the inductor 6 during operation is transferred through the winding bobbin to the support crossbar 1, and then transferred from the support crossbar 1 to the heat transfer fluid 9. The heat transfer fluid 9 transfers the heat to the side support frames 2. The heat transfer fluid 9 has a high thermal conductivity coefficient, so that the heat of the inductor 6 can be quickly transferred to the support crossbar and the two sets of side support frames 2, greatly increasing the heat dissipation area, that is, greatly improving the heat dissipation efficiency, and avoiding excessive heat accumulation in the middle and interior of the inductor 6 to generate high temperature.

[0035] Since it is necessary to ensure that the first winding drum 3 and the third winding drum 5 can slide on the support crossbar 1, there must be a certain gap between the first winding drum 3 and the second winding drum 4 and the support crossbar 1. The gap will reduce the contact area between the first winding drum 3 and the second winding drum 4 and the support crossbar 1, thereby affecting the heat conduction efficiency between the first winding drum 3 and the third winding drum 5 and the support crossbar 1. To solve this problem, in this embodiment, thermal conductive grease is applied between the first winding drum 3 and the support crossbar 1 and between the third winding drum 5 and the support crossbar 1. The thermal conductive grease can fill the gap, improve the heat conduction efficiency between the first winding drum 3 and the third winding drum 5, and act as a lubricant, making it easier for the first winding drum 3 and the third winding drum 5 to slide.

[0036] In order to further increase the heat dissipation area, multiple groups of heat dissipation fins are provided on the inner and outer surfaces of the side support frame 2 .

[0037] Reference Figure 2 and Figure 3 In this embodiment, a horizontal annular frame 19 is provided below the driving mechanism, the outer side of the annular frame 19 is connected and fixed to one end of the lower connecting plate 18, and the other end of the lower connecting plate 18 is connected and fixed to the side support frame 2. The shell of the cooling fan 16 is located in the annular frame 19, and the blades 17 of the cooling fan 16 are located above the annular frame 19. The shell of the cooling fan 16 is rotatably connected to the annular frame 19 through a rotating shaft 20, so that the cooling fan 16 can swing within a certain range.

[0038] A counterweight 25 and a first magnet 26 are fixed to each end of the blade 17 of the cooling fan 16. The counterweight 25 and the first magnet 26 are of equal weight and are symmetrically distributed at both ends of the blade 17. A second magnet 28 is positioned above the path of the first magnet 26 as it rotates with the blade 17. The second magnet 28 is fixed to the threaded sleeve 13 via a connector 27. The second magnet 28 and the first magnet 26 attract each other.

[0039] As blades 17 rotate, first magnet 26 alternately approaches and moves away from second magnet 28, causing the magnetic force to cause blades 17 to oscillate. Because blades 17 rotate at a high speed, the magnetic attraction between first magnet 26 and second magnet 28 causes the end of blade 17 closest to second magnet 28 to remain tilted upward, causing cooling fan 16 to oscillate as a whole while maintaining a constant angle.

[0040] Therefore, a third temperature value can be preset, which is greater than the second temperature value. When the detected temperature value is greater than the third temperature value, the controller controls the drive motor 11 to periodically rotate forward and reverse, thereby driving the threaded sleeve 13 to periodically rise and fall. When the blades 17 rotate at high speed, when the second magnet block 28 periodically rises and falls with the threaded sleeve 13, the periodic change in magnetic force will cause the cooling fan 16 as a whole to oscillate back and forth periodically, thereby causing the direction of the blown air to change periodically, ensuring that the air is effectively blown to all parts of the inductor coil 6, so that the inductor coil 6 dissipates heat and cools more evenly, achieving better and more efficient heat dissipation.

[0041] To limit the swing amplitude of cooling fan 16 and prevent blades 17 from colliding with other parts, a limit ring 22 is coaxially disposed below annular frame 19 in this embodiment. Limit ring 22 is connected to annular frame 19 via a fixing rod 21, and the inner diameter of limit ring 22 is smaller than that of annular frame 19. A swing rod 24 is coaxially fixed to the bottom of the cooling fan housing 16 and extends downward into limit ring 22.

[0042] When the cooling fan 16 swings, when the swing rod 24 contacts the inner wall of the limit ring 22, the limit ring 22 can prevent the cooling fan 16 from swinging further, thereby limiting the swing amplitude of the cooling fan 16 and preventing the blades 17 from colliding with other parts.

[0043] Considering that the swing rod 24 will make a sound and generate noise when it contacts the limiting ring 22, in this embodiment, an elastic buffer pad 23 is coaxially fixed on the inner wall of the limiting ring 22, and the swing rod 24 contacts the buffer pad 23, so that no noise is generated.

[0044] The buffer pad 23 in this embodiment is a porous sponge, which has good buffering and noise reduction capabilities.

[0045] Reference Figure 4 The controller in this embodiment includes a main control module, as well as a motor drive module, a fan drive module, a communication module, and a power module connected to the main control module. The output of the motor drive module is connected to the drive motor 11 to control the drive motor 11; the output of the fan drive module is connected to the cooling fan 16 to control the cooling fan 16; the communication module is used for communication between the controller and the host computer or backend server to achieve remote monitoring of the inductor temperature; the output of the temperature sensor is connected to the sampling terminal of the main control module, and the power module is used for power supply.

[0046] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A high-frequency inductor embedded in a heat sink, comprising a support crossbar and an inductor coil, with two sets of side support frames symmetrically fixed at both ends of the support crossbar, characterized by: The first winding drum, the second winding drum and the third winding drum are provided on the support cross bar, wherein the first winding drum is fixedly sleeved on the support cross bar, the second winding drum and the third winding drum are respectively located on both sides of the first winding drum, and the second winding drum and the third winding drum are movably sleeved on the support cross bar, the inductor coil is sequentially wound on the second winding drum, the first winding drum and the third winding drum, the head end of the inductor coil is connected to the first terminal, the tail end of the inductor coil is connected to the second terminal, the wire body of the inductor coil located between adjacent winding drums has a length margin, a driving mechanism for driving the first winding drum and the third winding drum to move is provided below the support cross bar, a cooling fan is provided below the driving mechanism, a film temperature sensor is installed between the first winding drum and the support cross bar, the inductor also includes a controller for controlling the cooling fan The controller of the fan and drive mechanism, the temperature sensor is connected to the sampling signal input end of the controller; the drive mechanism includes a drive motor, a screw rod and a threaded sleeve, the housing of the drive motor is connected and fixed to the side support frame through an upper connecting plate, the screw rod is arranged vertically, the screw rod is coaxially connected to the output shaft of the drive motor, the screw rod is sleeved with a threaded sleeve, the threaded sleeve is threadedly matched with the screw rod, the lower parts of the first winding reel and the third winding reel are fixed with connecting blocks, the two groups of connecting blocks are respectively connected to the threaded sleeves through two groups of connecting rods, and the two groups of connecting rods are in an inverted "eight" shape; the support cross bar and the side support frame are both hollow structures, the interior of the support cross bar is connected to the interior of the side support frame, the interior of the support cross bar and the side support frame is filled with heat-conducting fluid, and the winding reel, support cross bar and side support frame are all made of heat-conducting material.

2. The high-frequency inductor embedded in a heat sink according to claim 1, characterized in that: Thermal conductive grease is applied between the first winding drum and the supporting cross bar, and between the third winding drum and the supporting cross bar.

3. The high-frequency inductor embedded in a heat sink according to claim 1, characterized in that: Multiple groups of heat dissipation fins are provided on the inner and outer surfaces of the side support frame.

4. The high-frequency inductor embedded in a heat sink according to claim 1, wherein: A horizontal annular frame is provided below the driving mechanism, and the annular frame is connected and fixed to the side support frame. The housing of the cooling fan is located in the annular frame, and the blades of the cooling fan are located above the annular frame. The housing of the cooling fan is rotatably connected to the annular frame. A counterweight block and a first magnet block are fixed at both ends of the blades of the cooling fan, respectively. The weight of the counterweight block and the first magnet block are equal, and the configuration block and the first magnet block are symmetrically distributed at both ends of the blade. A second magnet block is provided above the path of the first magnet block rotating with the blade, and the second magnet block is connected and fixed to the threaded sleeve through a connecting piece, and the second magnet block and the first magnet block attract each other.

5. The high-frequency inductor embedded in a heat sink according to claim 4, characterized in that: A limiting ring is coaxially arranged below the annular frame, and the limiting ring is connected and fixed to the annular frame. The inner diameter of the limiting ring is smaller than the inner diameter of the annular frame. A swing rod is coaxially fixed to the bottom of the housing of the cooling fan, and the swing rod extends downward into the limiting ring.

6. The high-frequency inductor embedded in a heat sink according to claim 5, characterized in that: An elastic buffer pad is coaxially fixed on the inner wall of the limiting ring.

7. The high-frequency inductor embedded in a heat sink according to claim 4, characterized in that: The controller compares the temperature value detected by the temperature sensor with a preset first temperature value and a second temperature value, where the second temperature value is greater than the first temperature value. When the detected temperature value is less than the first temperature value, the controller controls the cooling fan and the drive motor not to operate; when the detected temperature value is greater than the first temperature value and less than the second temperature value, the controller controls the cooling fan to start; when the detected temperature is greater than the second temperature value, the controller controls the drive motor to rotate, and at this time the drive motor drives the first winding bobbin and the second winding bobbin to move away from each other.

8. The high-frequency inductor embedded in a heat sink according to claim 7, characterized in that: Also in advance A third temperature value is provided, and the third temperature value is greater than the second temperature value. When the detected temperature value is greater than the third temperature value, the controller controls the drive motor to periodically rotate forward and reverse, thereby driving the threaded sleeve to periodically rise and fall.

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