A PFC inductor with magnetic shielding structure

Abstract

The invention discloses a PFC inductor with a magnetic shielding structure, which specifically relates to the field of environmental protection equipment and resource recovery. The inductor comprises an inductor body, which comprises an I-shaped inductor and a fixing plate for fixing the inductor body, and a magnetic shielding cover, which comprises a magnetic shielding box and a magnetic shielding cover for sealing two ends of the magnetic shielding box. Two groups of isolation frame groups are arranged inside the magnetic shielding box, and the two groups of isolation frame groups are attached to the two ends of the I-shaped inductor. The isolation frame groups are attached to the two ends of the I-shaped inductor and support the magnetic shielding cover to form a heat insulation layer between the magnetic shielding cover and the outer wall of the I-shaped inductor. The heat insulation layer and the heat dissipation layer are staggered to facilitate the dissipation of heat. At the same time, a shielding plate group, a heat conducting plate group and a blocking plug plate with complex structures are arranged to increase the contact area and the dissipation area of ​​the heat, effectively reduce the operating temperature of the I-shaped inductor, and improve its service life.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection equipment and resource recovery, and more specifically, to a PFC inductor with a magnetic shielding structure. Background Art

[0002] PFC inductors are components that can convert electrical energy into magnetic energy and store it. The structure of a PFC inductor is similar to that of a transformer, but it has only one winding. A PFC inductor has a certain inductance, and it only blocks the change of current. If there is no current flowing through the PFC inductor, it will try to block the current from flowing through it when the circuit is turned on; if there is current flowing through the PFC inductor, it will try to maintain the current when the circuit is turned off. PFC inductors are also called chokes, reactors, and dynamic reactors.

[0003] A Chinese patent with authorization announcement number CN210805447U discloses a PFC inductor with efficient heat dissipation function, including a PFC inductor box, a base, a connection frame, a connection rod, a magnetic core, a winding group, an installation connection pipe, a heat absorption cooling device, a heat dissipation device, an air inlet horizontal pipe, an air inlet vertical pipe and an air inlet dustproof device. One end of the base is connected to an inner end surface of the PFC inductor box by bolts, and the connection frame is connected to the upper end surface of the base. The setting of the heat absorption cooling device of the utility model is conducive to absorbing the heat inside the PFC inductor and then cooling it, so that the internal components of the PFC inductor are always in the best working state, ensuring the normal working temperature of the internal components of the PFC inductor, so that the PFC inductor can operate normally.

[0004] Existing PFC inductors are prone to generate heat during use. Excessive heat can easily damage the PFC inductor and require heat dissipation. However, existing PFC inductors still have problems such as poor heat absorption and cooling effect and poor heat dissipation function, which may cause damage to internal components of the PFC inductor.

[0005] Secondly, due to the inability to provide good electromagnetic shielding, the PFC inductor has important performance defects such as high leakage flux and large loss, resulting in a low power factor and high temperature rise of the PFC inductor.

[0006] Therefore, a PFC inductor with a magnetic shielding structure is designed, which has a good electromagnetic shielding effect, reduces the operating temperature and improves the working efficiency. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a PFC inductor with a magnetic shielding structure to solve the problem that the existing PFC inductor has poor heat dissipation function and causes damage to the internal components of the PFC inductor.

[0008] To achieve the above object, the present invention provides the following technical solution: a PFC inductor with a magnetic shielding structure, comprising:

[0009] The inductor body comprises an I-shaped inductor and a fixing plate for fixing the inductor body;

[0010] A magnetic shielding cover comprises a magnetic shielding box and a magnetic shielding cover for sealing both ends of the magnetic shielding box, two groups of isolation frame groups are arranged inside the magnetic shielding box, the two groups of isolation frame groups are attached to both ends of the I-shaped inductor, the isolation frame groups are attached to both ends of the I-shaped inductor and support the magnetic shielding cover and the outer wall of the I-shaped inductor to form a heat insulation layer, in the heat insulation layer, a plurality of groups of limiting fin groups distributed in an annular shape are arranged to be inserted into the winding of the I-shaped inductor and fixed to the inner wall of the magnetic shielding box;

[0011] The protective cover is sleeved on the outside of the magnetic shielding cover and is spaced from the outer wall of the magnetic shielding cover to form a heat dissipation layer. The interior of the protective cover is penetrated by ventilation parts and flow guide parts, and a heat dissipation groove body is opened on the surface of the protective cover. The heat dissipation groove body is used for exchanging airflow between the heat dissipation layer and the outside. The ventilation parts and flow guide parts accelerate the airflow exchange between the thermal insulation layer and the heat dissipation layer by rotating.

[0012] The isolation frame group includes a plurality of isolation frames arranged on one side of the I-shaped inductor, and the isolation frame includes an internal plate, an isolation rod and an external plate that are engaged with the end of the I-shaped inductor;

[0013] The internal plate is fixedly connected to the external plate via an isolation rod;

[0014] The magnetic shielding box includes a shielding plate group, a heat conducting plate group and a blocking plate group. The shielding plate group includes a plurality of shielding plates distributed at equal intervals. The heat conducting plate group includes a plurality of heat conducting plates, and every two of the heat conducting plates are fixedly connected to the two ends of the shielding plate. The blocking plate group includes a plurality of blocking plates, and each of the blocking plates is used to be engaged in the heat conducting plates at the ends of two adjacent groups of shielding plates. The plurality of isolation frames and the plurality of blocking plates are arranged in a one-to-one correspondence.

[0015] Preferably, each group of the limiting fins corresponds to a shielding plate, and each group of the limiting fins includes a plurality of limiting fins, each of which is an arc-shaped plate that is inserted into the winding to space the multiple turns of wire that constitute the winding.

[0016] Preferably, a plurality of divergently arranged heat dissipating fins are fixedly connected to the outer surface of the shielding plate;

[0017] The heat conducting plate comprises a bending plate, a plurality of divergently arranged heat conducting fins are fixedly connected to one side of the bending plate facing the heat insulating layer, a plurality of positioning columns are fixedly connected to the opposite end surface of the bending plate, and the plurality of positioning columns are pressed against the surface of the blocking plug plate.

[0018] Preferably, the magnetic shielding cover bodies are in two groups and are symmetrical to each other. The magnetic shielding cover bodies include a sealing cover and a plurality of covering clamps fixed to the side walls of the sealing cover. A mounting hole is penetrated at the center of the sealing cover, and a plurality of guide holes and two groups of limit baffles are fixedly connected around the mounting hole. The two groups of limit baffles are located on a straight line passing through the center line of the mounting hole, and the guide holes are distributed within a quarter circumference of the surface of the mounting hole.

[0019] Preferably, the protective covers are in two groups and are symmetrical to each other. The two groups of protective covers are fixed inside the fixing plate, and the protective covers are connected to the magnetic shielding cover body through ventilation parts and flow guide parts.

[0020] Preferably, the ventilation component includes a worm gear, a motor and a seal gear installed through the inside of the heat dissipation slot, wherein the worm gear is fixedly connected to the end of the output shaft of the motor gear, the motor gear is fixed to the outer wall of the protective cover, the seal gear is engaged with the sealing cover and moves along the axial direction of the worm gear, and the worm gear and the seal gear are threadedly connected.

[0021] Preferably, the guide member includes motor 2, a round rod, seal 2 and a spoiler. Motor 2 is fixed to the outer wall of the protective cover, the round rod is fixed to the end of the output shaft of motor 2 and seal 2 is sleeved at the end, and the spoiler is fixed to one end of seal 2 that passes through the sealing cover.

[0022] Preferably, a limiting ring is fixedly connected to the rod body surface of the round rod to limit the movement of the second seal, and the spoiler includes a sleeve fixed to the end of the spoiler and a plurality of blades inserted into the surface of the sleeve.

[0023] Technical effects and advantages of the present invention:

[0024] The device is provided with a detachable magnetic shielding cover and a magnetic shielding box, which is convenient for later inspection and maintenance, and at the same time improves the reuse rate of the magnetic shielding cover. At the same time, the magnetic shielding cover is assembled from a shielding plate group, a heat conducting plate group and a blocking plug plate group. The staggered plates reduce the magnetic flux leakage rate of the inductance, increase the electromagnetic absorption area, and improve the electromagnetic shielding effect.

[0025] The device is provided with a heat insulation layer and a heat dissipation layer, which are staggered to facilitate heat dissipation. At the same time, a shielding plate group, a heat conduction plate group and a blocking plug plate with a complex structure are provided to increase the contact area and the dissipation area of ​​the heat, effectively reducing the operating temperature of the I-shaped inductor and prolonging its service life.

[0026] The device inserts multiple limiting fins into the winding to fix the position of the wire through the blocking of the limiting fins. The isolated wire is easy to dissipate heat, and the heat dissipation effect is improved through contact heat conduction.

[0027] The device increases the surface area and further improves the heat dissipation efficiency by arranging multiple divergent fins on the shielding plate;

[0028] The device achieves connectivity between the insulation layer and the heat dissipation layer by measuring the temperature change of the insulation layer, triggering and rotating at high temperature, and then achieving directional flow of air in the insulation layer through the rotation of the spoiler, thereby achieving rapid exchange of cold and hot air flows and rapid heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A structural cross-sectional view of a PFC inductor with a magnetic shielding structure;

[0030] Figure 2 For the present invention Figure 1 A magnified view of the structure of part A;

[0031] Figure 3 For the present invention Figure 1 A magnified view of the structure of part B;

[0032] Figure 4 This is a schematic diagram of the structure in which the isolation frame assembly of the present invention is installed on the inductor body;

[0033] Figure 5 A partial structural diagram of a PFC inductor with a magnetic shielding structure;

[0034] Figure 6 For the present invention Figure 5 A magnified view of the C-section structure;

[0035] Figure 7 For the present invention Figure 5 A magnified view of the D-section structure;

[0036] Figure 8 It is a schematic diagram of the overall structure of the magnetic shielding cover of the present invention.

[0037] The reference numerals are: 100, inductor body; 200, isolation frame group; 210, built-in plate; 220, isolation rod; 230, external plate; 300, magnetic shielding box; 310, shielding plate group; 311, heat dissipation fin; 320, heat conduction plate group; 321, bending plate; 322, positioning column; 323, heat conduction fin; 330, blocking plug plate group; 340, limit fin group; 400, magnetic shielding cover; 410 , sealing cover; 411, mounting hole; 412, limit baffle; 413, guide hole; 420, cover clamp; 421, U-shaped clamp; 422, gear bar; 500, protective cover; 510, heat dissipation trough; 600, ventilation part; 610, motor one; 620, worm; 630, seal one; 700, guide part; 710, motor two; 720, round rod; 730, seal two; 740, spoiler. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Refer to the instruction manual Figure 1-Figure 8 , a PFC inductor with a magnetic shielding structure, comprising:

[0040] The inductor body 100 includes an I-shaped inductor and a fixing plate for fixing the inductor body 100;

[0041] The magnetic shield is used to shield the electromagnetic radiation emitted by the I-shaped inductor and avoid external electromagnetic interference on the I-shaped inductor. It is made of ferromagnetic materials such as stainless steel and nickel silver, and the thickness is set to 0.2mm.

[0042] It includes a magnetic shielding box 300 and a magnetic shielding cover 400 for sealing both ends of the magnetic shielding box 300. Two groups of isolation frame groups 200 are arranged inside the magnetic shielding box 300. The two groups of isolation frame groups 200 are attached to both ends of the I-shaped inductor. The isolation frame groups 200 are attached to both ends of the I-shaped inductor and support the magnetic shielding cover and the outer wall of the I-shaped inductor to form a heat insulation layer. In the heat insulation layer, multiple groups of limiting fin groups 340 distributed in an annular shape are arranged to be inserted into the winding of the I-shaped inductor and fixed to the inner wall of the magnetic shielding box 300.

[0043] The protective cover 500 is sleeved on the outside of the magnetic shielding cover and is spaced from the outer wall of the magnetic shielding cover to form a heat dissipation layer. The interior of the protective cover 500 is penetrated by a ventilation piece 600 and a flow guide piece 700, and a heat dissipation groove body 510 is opened on the surface of the protective cover 510. The heat dissipation groove body 510 is used for exchanging airflow between the heat dissipation layer and the outside. The ventilation piece 600 and the flow guide piece 700 accelerate the airflow exchange between the thermal insulation layer and the heat dissipation layer by rotation. The heat dissipation groove body 510 has a large groove diameter, and is used for sufficient channels on the surface of the protective cover 500 to exchange airflow and achieve rapid heat dissipation. Secondly, the protective cover 500 is used to protect the I-shaped inductor.

[0044] The isolation frame group 200 includes a plurality of isolation frames mounted on one side of the I-shaped inductor, and the isolation frame includes an internal plate 210, an isolation rod 220 and an external plate 230 that are engaged with the end of the I-shaped inductor; the internal plate 210 is fixedly connected with the external plate 230 through the isolation rod 220, and the isolation frame group 200 is of a skeleton design. The contact surface between the isolation frame group 200 and the I-shaped inductor is small, and the magnetic shielding cover is separated from the I-shaped inductor to prevent the magnetic shielding cover from sticking to the I-shaped inductor to affect the heat dissipation of the I-shaped inductor, causing the temperature of the heat insulation layer to be too high, thereby reducing the service life of the I-shaped inductor.

[0045] The magnetic shielding box 300 includes a shielding plate group 310, a heat conducting plate group 320 and a blocking plate group 330. The shielding plate group 310 includes a plurality of shielding plates distributed at equal intervals. The plurality of shielding plates distributed at intervals constitute a non-sealed arc-shaped cylinder, and the arc center of the arc-shaped cylinder is located on the center line of the winding. The arc-shaped cylinder composed of a plurality of shielding plates distributed at intervals fits tightly against the side of the fixed plate to prevent magnetic leakage at the connection between the shielding plate and the fixed plate. The shielding plates located at both ends of the arc-shaped cylinder are incomplete plates and need to be cut according to the size of the fixed plate. The heat conducting plate group 320 includes a plurality of heat conducting plates, and every two heat conducting plates are fixedly connected to the two ends of the shielding plate. The blocking plate group 330 includes a plurality of blocking plates, and each blocking plate is used to be engaged in the heat conducting plates at the ends of two adjacent groups of shielding plates. The plurality of isolation frames and the plurality of blocking plates are arranged in a one-to-one correspondence.

[0046] Reference Figure 1 , Figure 2 , Figure 3 as well as Figure 8 As shown, two adjacent shielding plates or two adjacent heat conducting plates are fixedly connected by means of an isolation frame group 200, and the positions where the two adjacent heat conducting plates are not in contact with the isolation frame group 200 are spaced to form a gap, and the electromagnetic energy emitted by the I-shaped inductor leaks out from the gap between the two adjacent heat conducting plates. A partition plate is inserted between the two adjacent heat conducting plates, and the partition plate is used to shield the electromagnetic energy leaked from the gap between the two adjacent heat conducting plates and absorb the leaked electromagnetic energy, thereby achieving an electromagnetic shielding effect;

[0047] The magnetic shielding cover of the device is a detachable structure. The detachable magnetic shielding cover is convenient for later inspection of faults of the I-shaped inductor and poor contact of the wire. At the same time, the detachable magnetic shielding cover can be installed on other I-shaped inductors of the same model, thereby improving the reuse rate of the magnetic shielding cover.

[0048] Each set of limiting fin groups 340 corresponds to a shielding plate, and each set of limiting fin groups 340 includes multiple limiting fins. Each limiting fin is an arc-shaped plate, which is inserted into the winding to space the multiple turns of wires that make up the winding. The arc bending direction of the limiting fins set in the arc-shaped plate is consistent with the spiral direction of the wire spiral. The limiting fins are used to fix the position of the wire, and the position of the wire is not easy to move under external vibration. Secondly, since there are certain gaps in the limiting fins of the winding, it is convenient for the wire to dissipate heat. At the same time, the limiting fins are in direct contact with the wire to facilitate heat transfer, and the heat of the wire and the heat of the insulation layer are quickly transferred to the limiting fins, and the limiting fins are then dissipated by the shielding plate to achieve a rapid heat dissipation function.

[0049] The outer surface of the shielding plate is fixedly connected with a plurality of heat dissipation fins 311 arranged in a divergent manner, and the plurality of heat dissipation fins 311 are used to increase the surface area of ​​the shielding plate to achieve rapid heat exchange;

[0050] The heat conducting plate includes a bending plate 321, and a plurality of heat conducting fins 323 arranged in a divergent manner are fixedly connected to one side of the bending plate 321 facing the heat insulation layer, and a plurality of positioning posts 322 are fixedly connected to the end face opposite to the bending plate 321. The plurality of positioning posts 322 are squeezed on the surface of the blocking plug plate. The special shape of the bending plate 321 is intended to increase the area with the heat insulation layer and the heat dissipation layer, and at the same time, an opening for the magnetic shielding cover 400 to be inserted is provided to realize the function of rapid heat dissipation of the heat insulation layer. Secondly, the blocking plug plate is inserted deeper into the bending plate 321, increasing the interlaced area of ​​the blocking plug plate and the shielding plate, better blocking the electromagnetic divergence of the I-shaped inductor, increasing the area of ​​electromagnetic absorption, and improving the shielding efficiency of the magnetic shielding cover.

[0051] There are two groups of magnetic shielding cover bodies 400 which are symmetrical to each other. The magnetic shielding cover bodies 400 include a sealing cover 410 and a plurality of covering clamps 420 fixed to the side walls of the sealing cover 410. A mounting hole 411 is penetrated at the center of the sealing cover 410. A plurality of guide holes 413 and two groups of limit baffles 412 are fixedly connected around the mounting hole 411. The two groups of limit baffles 412 are located on a straight line passing through the center line of the mounting hole 411. The guide holes 413 are distributed within a quarter of the circumference of the surface of the mounting hole 411. The covering clamps 420 include a plurality of U-shaped clamps 421 and baffles 422 distributed in a ring shape. A plurality of baffles 422 extend from the end faces of the U-shaped clamps 421. The U-shaped clamps 421 and the baffles 422 seal the connection of the plurality of barrier plugs again to reinforce them and improve the shielding effect of the magnetic shielding cover.

[0052] Reference Figure 1 , Figure 2 , Figure 3 as well as Figure 8 As shown, the mounting holes 411 located on the surface of the sealing cover 410 are used to mount the ventilation member 600 and the flow guide member 700, and the flow guide holes 413 are used to exchange the airflow between the heat insulation layer and the heat dissipation layer.

[0053] There are two groups of protective covers 500 which are symmetrical to each other. The two groups of protective covers 500 are fixed inside the fixing plate. The protective covers 500 are connected to the magnetic shielding cover 400 through the ventilation member 600 and the guide member 700 .

[0054] The ventilation member 600 includes a worm 620, a motor 610 and a seal 630 which are installed through the heat dissipation slot 510. The seal 630 moves away from the sealing cover 410, and the mounting hole 411 is not blocked. The heat insulation layer and the heat dissipation layer realize airflow exchange, wherein the worm 620 is fixedly connected to the output shaft end of the motor 610, and the motor 610 is fixed to the outer wall of the protective cover 500. The seal 630 is clamped on the sealing cover 410 and moves along the axial direction of the worm 620. The clamping method limits the movement on the surface of the sealing cover 410. The surface of the sealing cover 410 has a group of ear clamps and an annular plate located on the clamping plate. The movable ring The position of the shaped plate realizes the sealing of the annular plate to the mounting hole 411, and the worm 620 and the sealing member 630 are threadedly connected. When the motor 610 drives the worm 620 to rotate forward, the ear-shaped clamping sleeve and the worm 620 make relative spiral motion, the sealing member 630 moves away from the sealing cover 410, the guide hole 413 is not blocked, and the heat insulation layer and the heat dissipation layer realize airflow exchange. When the motor 610 drives the worm 620 to rotate reversely, the ear-shaped clamping sleeve and the worm 620 make relative spiral motion, the sealing member 630 approaches the sealing cover 410 until it fits, and the output shaft of the motor 610 stops rotating, the guide hole 413 is blocked, and the heat insulation layer and the heat dissipation layer cannot realize airflow exchange.

[0055] The guide member 700 includes a second motor 710, a round rod 720, a second seal 730 and a spoiler 740. The second motor 710 is fixed to the outer wall of the protective cover 500. The round rod 720 is fixed to the end of the output shaft of the second motor 710 and the second seal 730 is sleeved at the end. The spoiler 740 is fixed to one end of the second seal 730 that passes through the sealing cover 410.

[0056] The rod body surface of the round rod 720 is also fixedly connected with a limit ring to limit the movement of the second seal 730. The spoiler 740 includes a sleeve fixed to the end of the spoiler 740 and a plurality of fan blades plugged into the surface of the sleeve. When the second motor 710 drives the round rod 720 to rotate forward, the round rod 720 and the spoiler 740 fixed to the round rod 720 move synchronously, and the second seal 730 is driven by the friction of the round rod 720 to rotate 90 degrees until it is blocked by the limit baffle 412. The position between the sealing cover 410 and the covering card plate 420 remains unchanged, and the first seal 630 keeps sliding on the surface of the covering card plate 420. The guide hole 413 is not blocked, and the heat insulation layer and the heat dissipation layer realize airflow exchange, and the airflow in the heat insulation cavity is disturbed by the spoiler 740 to move in a directional manner.

[0057] When the motor 1 610 drives the worm 620 to reverse, the round rod 720 and the spoiler 740 fixed to the round rod 720 move synchronously, and the seal 2 730 is driven by the friction of the round rod 720 to rotate 90 degrees in the opposite direction to reset, and is blocked by another set of limit baffles 412, the guide hole 413 is blocked, and the insulation layer and the heat dissipation layer cannot achieve airflow exchange.

[0058] The device is also provided with a temperature sensor and a controller. The temperature sensor is attached to the inner wall of the shielding plate and senses the temperature inside the insulation layer. The controller is used to control the rotation, start and stop of the motor 610 and the worm 620.

[0059] Working principle: When the temperature sensed by the temperature sensor does not reach the specified temperature, the outer cover of the I-shaped inductor has a magnetic shielding cover and a protective cover 500 for double reinforcement of the I-shaped inductor to improve the efficiency of electromagnetic shielding. The special shape of the limiting fin group 340, the heat conducting plate group 320, and the shielding plate group 310 is used to increase the surface area of ​​the inner and outer layers to achieve better heat conduction and heat exchange effects, so as to achieve the purpose of rapid heat dissipation;

[0060] When the temperature in the thermal insulation layer is high, the thermal insulation layer is connected to the heat dissipation layer and the directional flow of air in the thermal insulation layer is achieved through the rotation of the spoiler 740, so that the hot air in the thermal insulation layer is quickly discharged. At the same time, the airflow of the heat dissipation layer is introduced into the thermal insulation layer through the rotation of the spoiler 740, so as to realize the rapid exchange of cold and hot airflows and achieve the rapid heat dissipation function.

[0061] The device is provided with a detachable magnetic shielding cover 400 and a magnetic shielding box 300, which is convenient for later inspection and maintenance, and at the same time improves the reuse rate of the magnetic shielding cover. At the same time, the magnetic shielding cover 400 is assembled from a shielding plate group 310, a heat conducting plate group 320 and a blocking plug plate group 330. The electromagnetic leakage rate is reduced by the interlaced plates, the electromagnetic absorption area is increased, and the electromagnetic shielding effect is improved.

[0062] The device uses a heat insulation layer and a heat dissipation layer, and the gap between the heat insulation layer and the heat dissipation layer facilitates the heat dissipation. At the same time, a shielding plate group 310, a heat conducting plate group 320 and a blocking plug plate group 330 with a complex structure are arranged to increase the contact area and the heat dissipation area, effectively reducing the operating temperature of the I-shaped inductor and increasing its service life.

[0063] The device inserts multiple limiting fins into the winding to fix the position of the wire through the blocking of the limiting fins. The isolated wire is easy to dissipate heat, and the heat dissipation effect is improved through contact heat conduction.

[0064] The device increases the surface area and further improves the heat dissipation efficiency by arranging multiple divergent fins on the shielding plate;

[0065] The device measures the change in temperature of the insulation layer. The high temperature triggers the rotation of the ventilation member 600 and the guide member 700 to achieve connectivity between the insulation layer and the heat dissipation layer. Secondly, the rotation of the spoiler 740 achieves directional flow of air in the insulation layer, thereby achieving rapid exchange of cold and hot air flows and rapid heat dissipation.

[0066] The device is provided with a detachable magnetic shielding cover 400 and a magnetic shielding box 300, which is convenient for later inspection and maintenance, and at the same time improves the reuse rate of the magnetic shielding cover. At the same time, the magnetic shielding cover 400 is assembled from a shielding plate group 310, a heat conducting plate group 320 and a blocking plug plate group 330. The electromagnetic leakage rate is reduced by the interlaced plates, the electromagnetic absorption area is increased, and the electromagnetic shielding effect is improved.

[0067] The device uses a heat insulation layer and a heat dissipation layer, and the gap between the heat insulation layer and the heat dissipation layer facilitates the heat dissipation. At the same time, a shielding plate group 310, a heat conducting plate group 320 and a blocking plug plate group 330 with a complex structure are arranged to increase the contact area and the heat dissipation area, effectively reducing the operating temperature of the I-shaped inductor and increasing its service life.

[0068] The device inserts multiple limiting fins into the winding to fix the position of the wire through the blocking of the limiting fins. The isolated wire is easy to dissipate heat, and the heat dissipation effect is improved through contact heat conduction.

[0069] The device increases the surface area and further improves the heat dissipation efficiency by arranging multiple divergent fins on the shielding plate;

[0070] The device measures the change in temperature of the insulation layer. The high temperature triggers the rotation of the ventilation member 600 and the guide member 700 to achieve connectivity between the insulation layer and the heat dissipation layer. Secondly, the rotation of the spoiler 740 achieves directional flow of air in the insulation layer, thereby achieving rapid exchange of cold and hot air flows and rapid heat dissipation.

[0071] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0072] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0073] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A PFC inductor with a magnetic shielding structure, characterized in that: include: An inductor body (100), comprising an I-shaped inductor and a fixing plate for fixing the inductor body (100); A magnetic shielding cover comprises a magnetic shielding box (300) and a magnetic shielding cover (400) for sealing both ends of the magnetic shielding box (300); two groups of isolation frame groups (200) are arranged inside the magnetic shielding box (300); the two groups of isolation frame groups (200) are fitted to both ends of an I-shaped inductor; the isolation frame groups (200) are fitted to both ends of the I-shaped inductor and support the magnetic shielding cover to separate from the outer wall of the I-shaped inductor to form a heat insulation layer; in the heat insulation layer, a plurality of groups of limiting fin groups (340) distributed in an annular shape are arranged to be inserted into the winding of the I-shaped inductor and fixed to the inner wall of the magnetic shielding box (300); A protective cover (500) is sleeved on the outside of the magnetic shielding cover and is spaced apart from the outer wall of the magnetic shielding cover to form a heat dissipation layer; a ventilation piece (600) and a flow guide piece (700) are inserted through the interior of the protective cover (500); a heat dissipation groove body (510) is provided on the surface of the protective cover (500); the heat dissipation groove body (510) is used for exchanging airflow between the heat dissipation layer and the outside; the ventilation piece (600) and the flow guide piece (700) accelerate the airflow exchange between the heat insulation layer and the heat dissipation layer by rotating; The isolation frame group (200) comprises a plurality of isolation frames arranged on one side of the I-shaped inductor, the isolation frame comprising an internal plate (210) engaged with the end of the I-shaped inductor, an isolation rod (220), and an external plate (230); the internal plate (210) is fixedly connected to the external plate (230) via the isolation rod (220); The magnetic shielding box (300) comprises a shielding plate group (310), a heat conducting plate group (320) and a blocking plug plate group (330); the shielding plate group (310) comprises a plurality of shielding plates distributed at equal intervals; the heat conducting plate group (320) comprises a plurality of heat conducting plates, and every two of the heat conducting plates are fixedly connected to the two ends of the shielding plate; the blocking plug plate group (330) comprises a plurality of blocking plug plates, and each of the blocking plug plates is used to be engaged in the heat conducting plates at the ends of two adjacent groups of shielding plates; and the plurality of isolation frames and the plurality of blocking plug plates are arranged in a one-to-one correspondence.

2. The PFC inductor with a magnetic shielding structure according to claim 1, characterized in that: Each group of the limiting fin groups (340) corresponds to a shielding plate, and each group of the limiting fin groups (340) comprises a plurality of limiting fins, each of the limiting fins being an arc-shaped plate which is inserted into the winding to space the multiple turns of wire constituting the winding.

3. The PFC inductor with a magnetic shielding structure according to claim 2, characterized in that: The outer surface of the shielding plate is fixedly connected to a plurality of divergently arranged heat dissipation fins (311); The heat conducting plate comprises a bending plate (321), a plurality of divergently arranged heat conducting fins (323) are fixedly connected to one side of the bending plate (321) facing the heat insulating layer, and a plurality of positioning columns (322) are fixedly connected to the opposite end face of the bending plate (321), wherein the plurality of positioning columns (322) are pressed against the surface of the blocking plug plate.

4. The PFC inductor with a magnetic shielding structure according to claim 3, characterized in that: The magnetic shielding cover bodies (400) are provided in two groups and are symmetrical to each other. The magnetic shielding cover bodies (400) include a sealing cover (410) and a plurality of cover clamps (420) fixed to the side walls of the sealing cover (410). A mounting hole (411) is penetrated at the center of the sealing cover (410). A plurality of guide holes (413) are provided around the mounting hole (411) and two groups of limit baffles (412) are fixedly connected. The two groups of limit baffles (412) are located on a straight line passing through the center line of the mounting hole (411). The guide holes (413) are distributed within a quarter of the circumference of the surface of the mounting hole (411).

5. The PFC inductor with a magnetic shielding structure according to claim 4, characterized in that: The protective covers (500) are provided in two groups and are symmetrical to each other. The two groups of protective covers (500) are fixed inside the fixing plate. The protective covers (500) are connected to the magnetic shielding cover (400) via the ventilation member (600) and the flow guide member (700).

6. The PFC inductor with a magnetic shielding structure according to claim 5, characterized in that: The ventilation member (600) includes a worm (620) installed in a through-type manner inside the heat dissipation slot (510), a motor (610) and a seal (630), wherein the worm (620) is fixedly connected to the end of the output shaft of the motor (610), the motor (610) is fixed to the outer wall of the protective cover (500), the seal (630) is engaged with the sealing cover (410) and moves along the axial direction of the worm (620), and the worm (620) and the seal (630) are threadedly connected.

7. The PFC inductor with a magnetic shielding structure according to claim 6, characterized in that: The guide member (700) includes a second motor (710), a round rod (720), a second seal (730) and a spoiler (740); the second motor (710) is fixed to the outer wall of the protective cover (500); the round rod (720) is fixed to the end of the output shaft of the second motor (710) and the second seal (730) is sleeved at the end; and the spoiler (740) is fixed to one end of the second seal (730) that passes through the sealing cover (410).

8. The PFC inductor with a magnetic shielding structure according to claim 7, characterized in that: The rod body surface of the round rod (720) is also fixedly connected to a limiting ring to limit the movement of the second sealing member (730), and the spoiler (740) comprises a shaft sleeve fixed to the end of the spoiler (740) and a plurality of fan blades plugged into the surface of the shaft sleeve.

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