Manganese-zinc ferrite magnetic ring resistant to high temperature interference

Abstract

The application provides a high-temperature interference-resistant manganese-zinc ferrite magnetic ring applied to the field of magnetic rings, and through the cooperation between the heat exchange bin and the sheath, when the temperature in the magnetic ring continuously rises, the heat expansion capsule expands and extrudes the heat dissipation column capsule, and then the pressure is transmitted to the annular channel, so that the heat dissipation liquid and the internal gas in the annular channel flow back to the heat exchange bin, the M-shaped spring sheet is extruded, the M-shaped spring sheet is extruded to press the air bin, the gas in the air bin is blown away to the surface of the heat dissipation ceramic sheet through the exhaust hole, when the temperature of the heat dissipation ceramic sheet decreases, the heat expansion capsule retracts, under the elastic force of the M-shaped spring sheet, the liquid bin is extruded and the heat dissipation liquid in the liquid bin is pushed back to the annular channel and the heat dissipation column capsule, and the circulation heat dissipation operation is carried out, so that the heat generated by the magnetic ring during operation is reduced, the phenomenon that the anti-electromagnetic interference ability of the magnetic ring is reduced due to the high temperature of the magnetic ring is avoided, the operation stability is improved, the market prospect is good, and the application is suitable for promotion and application.

Description

Technical Field

[0001] This application relates to the field of magnetic rings, and in particular to a manganese-zinc ferrite magnetic ring resistant to high-temperature interference. Background Technology

[0002] Manganese zinc ferrite magnetic rings possess the wear resistance of ceramics, as well as good magnetic permeability and a volume resistivity of hundreds to thousands of ohms per centimeter. In electronic components, magnetic rings or cores made of manganese zinc ferrite material are commonly used in 1KHz to 10MHz tuning circuits or magnetic power supplies.

[0003] As the level of circuit integration in electronic devices continues to improve, the number of required circuit components gradually increases, and the heat generated also gradually increases. In the process of circuit integration development, the volume requirements of the circuit components are relatively high. Traditional manganese zinc ferrite magnetic rings require a large amount of enameled wire. The large amount of enameled wire often increases the volume of components using manganese zinc ferrite magnetic rings as components. If the amount of enameled wire is reduced, it is often necessary to increase the permeability of the manganese zinc ferrite magnetic ring. Increasing the permeability requires improving the spatial structure of the magnetic ring to suppress the temperature rise of the magnetic ring under continuous excitation environment.

[0004] Meanwhile, manganese-zinc ferrite magnetic rings generate a ring-shaped electric field during use, which leads to an increase in their own temperature and seriously affects their ability to resist electromagnetic interference. To address this issue, we propose a manganese-zinc ferrite magnetic ring that is resistant to high-temperature interference. Summary of the Invention

[0005] The purpose of this application is to design a manganese-zinc ferrite magnetic ring structure with self-heating function, which can dissipate its own operating temperature during operation, thereby reducing the impact of temperature on its anti-electromagnetic interference performance and improving the stability of operation. Compared with the existing technology, this application provides a manganese-zinc ferrite magnetic ring resistant to high temperature interference. It adopts a design of two sets of magnetic rings that are sleeved on the outside of the conductor. The magnetic rings have heat-conducting grooves on both sides, and the magnetic rings have several axial holes evenly distributed at an angle along the arc direction of the heat-conducting grooves. The axial holes are through holes and connect the heat-conducting grooves on both sides of the magnetic rings. The opposite ends of the two sets of magnetic rings are provided with mating grooves.

[0006] The outer side of the two sets of magnetic rings is provided with a fixing module for covering and fixing them to the cable. The fixing module includes two sets of sheaths. The sheaths are semi-circular ring-shaped structures. The inner wall of the sheaths is provided with an annular channel corresponding to the heat conduction groove. Several heat dissipation bladders that match the axial holes are fixed on the annular channel. The annular channel is connected to the heat dissipation bladders. The heat dissipation bladders extend into the axial holes. Thermal expansion bladders are fixed between the heat dissipation bladders in the same axial hole.

[0007] The outer side of the sheath is bonded with heat dissipation ceramic plates, and heat is transferred between the heat dissipation ceramic plates and the annular channel through thermally conductive adhesive. The inner side of the sheath is fixed with a heat exchange chamber, which is equipped with an M-shaped spring plate. The M-shaped spring plate divides the heat exchange chamber into an isolated gas chamber and a liquid chamber. The liquid chamber is connected to the annular channel. The liquid chamber, the annular channel and the heat dissipation column are all filled with heat dissipation liquid. The gas chamber is connected to the heat dissipation ceramic plates through a connecting block. The M-shaped spring plate is equipped with an exhaust hole for guiding the gas in the gas chamber into the heat dissipation ceramic plates.

[0008] Furthermore, the thermal expansion bladder is fixed to the axial hole with thermally conductive silicone, and the thermal expansion bladder is filled with a thermal expansion gas, which is carbon dioxide gas.

[0009] Furthermore, the heat dissipation fluid is an alcohol solution, and the inner walls of the liquid tank and the annular channel are both fixed with a metal sponge layer.

[0010] Furthermore, the metal sponge layer is made of copper, and the amount of heat dissipation fluid filling the liquid tank, annular channel, and heat dissipation column is not less than half of the total volume of the three.

[0011] Furthermore, the outer side of the M-shaped spring sheet is covered with an elastic membrane, which is used to separate the sealed gas chamber and the liquid chamber.

[0012] Furthermore, the M-type spring sheet is a fatigue-resistant copper spring sheet structure, and the M-type spring sheet has an elastic force to prevent its two sides from getting close together.

[0013] Optionally, one side of the two sheaths can be rotated via a pivot, and the other side of the two sheaths is provided with a latch.

[0014] Furthermore, the heat sink has multiple heat dissipation micro-holes, and the heat sink is bonded to the outside of the sheath with thermally conductive silicone. The output end of the exhaust port has a smaller diameter than the input end.

[0015] Furthermore, the mating seams of the two sets of sheaths and the mating seams of the magnetic rings are arranged in a cross shape, that is, the heat exchange chamber is located in the middle of the inner side of the sheaths.

[0016] Furthermore, a sealing ring is fixed on the side of the sheath that contacts the conductor. The sealing ring forms a sealed space between the sheath and the conductor by abutting against the outer wall of the conductor.

[0017] Compared to existing technologies, the advantages of this application are:

[0018] (1) The present invention utilizes the mutual cooperation between the heat exchange chamber with air chamber, liquid chamber and M-type spring sheet and the sheath with heat dissipation column and annular channel. When the magnetic ring is fitted on the outside of the conductor, the annular magnetic field generated by the change of conductor current causes an annular electric field to be generated in the magnetic ring, thus generating heat. This heat is preferentially absorbed by the heat dissipation liquid in the heat dissipation column and annular channel, and the annular channel is used to conduct heat dissipation in the thermally conductive contact with the heat dissipation ceramic plate for preliminary heat dissipation.

[0019] (2) When the temperature inside the magnetic ring continues to rise, the excess heat causes the carbon dioxide gas in the thermal expansion bladder to expand, which in turn squeezes the heat dissipation column along the axial hole. The compressed heat dissipation column retracts, which in turn transmits the pressure to the annular channel, causing the heat dissipation liquid and internal gas in the annular channel to flow back into the heat exchange chamber. On the one hand, the heat dissipation liquid with high heat content mixes with the heat dissipation liquid with low heat content in the heat exchange chamber to achieve a cooling effect. On the other hand, the pressurized heat dissipation liquid flows back into the heat exchange chamber and squeezes the M-type spring plate, causing the M-type spring plate to be compressed and squeeze the air chamber. The gas in the air chamber is blown to the surface of the heat dissipation ceramic plate through the exhaust hole to reduce the surface temperature of the heat dissipation ceramic plate and increase the heat dissipation efficiency.

[0020] (3) When the temperature of the heat sink ceramic plate decreases, it drives the magnetic ring and its internal thermal expansion bladder to cool down. The thermal expansion bladder retracts and, under the elastic force of the M-type spring plate, squeezes the liquid chamber and pushes the heat sink inside it back into the annular channel and heat sink bladder to carry out circulating heat dissipation. This reduces the heat generated by the magnetic ring during operation, avoids the magnetic ring being at high temperature and thus reduces its anti-electromagnetic interference ability, and improves its operational stability. It has market prospects and is suitable for promotion and application.

[0021] (4) By designing the metal sponge layer, the heat dissipation liquid in the annular channel and liquid tank can adhere to the metal sponge layer through the heat evaporation effect, further improving the performance of self-heat dissipation.

[0022] (5) By using a heat dissipation ceramic plate with heat dissipation micropores and an exhaust port with an output end diameter smaller than the input end diameter, when the M-type spring plate is compressed and the gas in the air chamber is pushed out, the flow rate will increase. The flow rate is fast and the cross-section is small, which will generate turbulence and "attract" the surrounding air to flow in, causing the overall temperature of the airflow to drop rapidly. Combined with the heat dissipation micropore design, the heat dissipation ceramic plate can be cooled down quickly under the airflow discharged from the exhaust port.

[0023] (6) The sheath design with a locking buckle and sealing ring makes the inside of the sheath less susceptible to external temperature, which not only prevents the external temperature from exchanging heat with the magnetic ring, but also improves its resistance to temperature interference. The locking buckle design allows for quick assembly and installation of the sheath and magnetic ring, thereby improving the convenience of maintenance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure when the wire is sleeved on the outside of the present application;

[0025] Figure 2 This is a schematic diagram of the structure of this application;

[0026] Figure 3 This is a schematic diagram of the exploded structure of this application;

[0027] Figure 4 This is a schematic diagram of the structure of the magnetic ring proposed in this application;

[0028] Figure 5 This is a schematic diagram of the structure of the sheath proposed in this application;

[0029] Figure 6 This is a schematic diagram of the longitudinal cross-sectional structure of this application;

[0030] Figure 7 This is a schematic diagram of the cross-sectional structure of this application;

[0031] Figure 8 for Figure 7 Enlarged structural diagram of section A in the middle;

[0032] Figure 9 This is a schematic diagram showing the state of the thermal expansion bladder before and after expansion in this application.

[0033] Figure 10 This is a schematic diagram of the M-type spring sheet in this application when it is not compressed;

[0034] Figure 11 This is a schematic diagram of the state of the M-type spring sheet under compression in this application.

[0035] Explanation of the labels in the diagram:

[0036] Sheath 1, heat dissipation ceramic plate 11, sealing ring 12, locking buckle 13, magnetic ring 2, heat conduction groove 21, axial hole 22, thermal expansion bladder 221, mating groove 23, heat exchange chamber 3, M-type spring plate 31, exhaust hole 311, connecting block 32, air chamber 33, liquid chamber 34, heat dissipation column bladder 4, annular channel 5. Detailed Implementation

[0037] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0038] Example 1:

[0039] This invention provides a manganese-zinc ferrite magnetic ring resistant to high-temperature interference. Please refer to [link / reference]. Figure 1-11The system includes two sets of magnetic rings 2 that are sleeved on the outside of the wire. The magnetic rings 2 have heat-conducting grooves 21 on both sides. The magnetic rings 2 have several axial holes 22 that are evenly distributed at an angle along the arc direction of the heat-conducting grooves 21. The axial holes 22 are through holes and connect the heat-conducting grooves 21 on both sides of the magnetic rings 2. The opposite ends of the two sets of magnetic rings 2 are provided with mating grooves 23. The two sets of magnetic rings 2 are provided with a fixing module for covering and fixing them to the cable. The fixing module includes two sets of sheaths 1. The sheaths 1 have a semi-circular ring structure. The inner wall of the sheaths 1 is provided with an annular channel 5 corresponding to the heat-conducting grooves 21. Several heat dissipation bladders 4 that match the axial holes 22 are fixed on the annular channel 5. The annular channel 5 is connected to the heat dissipation bladders 4. The heat dissipation bladders 4 extend into the axial holes 22. Thermal expansion bladders 221 are fixed between the heat dissipation bladders 4 in the same axial hole 22.

[0040] The outer side of the sheath 1 is bonded with a heat dissipation ceramic plate 11. Heat is transferred between the heat dissipation ceramic plate 11 and the annular channel 5 through thermally conductive adhesive. The inner side of the sheath 1 is fixed with a heat exchange chamber 3. The heat exchange chamber 3 is provided with an M-shaped spring plate 31. The M-shaped spring plate 31 divides the heat exchange chamber 3 into an isolated gas chamber 33 and a liquid chamber 34. The liquid chamber 34 is connected to the annular channel 5. The liquid chamber 34, the annular channel 5 and the heat dissipation column 4 are all filled with heat dissipation liquid. The gas chamber 33 is connected to the heat dissipation ceramic plate 11 through a connecting block 32. The M-shaped spring plate 31 is provided with an exhaust hole 311 for guiding the gas in the gas chamber 33 into the heat dissipation ceramic plate 11. The outer side of the M-shaped spring plate 31 is covered with an elastic membrane. The elastic membrane is used to separate the sealed gas chamber 33 and the liquid chamber 34. The M-shaped spring plate 31 is a fatigue-resistant copper spring plate structure. The M-shaped spring plate 31 has an elastic force to prevent its two sides from approaching each other.

[0041] The present invention utilizes the interaction between the heat exchange chamber 3 with air chamber 33, liquid chamber 34 and M-type spring plate 31 and the sheath 1 with heat dissipation column 4 and annular channel 5. When the magnetic ring 2 is fitted onto the outside of the conductor, the annular magnetic field generated by the change of conductor current causes an annular electric field to be generated inside the magnetic ring 2, thus generating heat. This heat is preferentially absorbed by the heat dissipation liquid in the heat dissipation column 4 and annular channel 5, and the annular channel 5 is used to conduct heat dissipation in the thermally conductive contact with the heat dissipation ceramic plate 11 for preliminary heat dissipation.

[0042] When the temperature inside the magnetic ring 2 continues to rise, the excess heat causes the carbon dioxide gas in the thermal expansion bladder 221 to expand, which in turn squeezes the heat dissipation column bladder 4 along the axial hole 22. The compressed heat dissipation column bladder 4 retracts, which in turn transmits the pressure to the annular channel 5, causing the heat dissipation liquid and internal gas in the annular channel 5 to flow back to the heat exchange chamber 3. On the one hand, the heat dissipation liquid with high heat content mixes with the heat dissipation liquid with low heat content in the heat exchange chamber 3 to achieve a cooling effect. On the other hand, the pressurized heat dissipation liquid flows back to the heat exchange chamber 3 and squeezes the M-type spring plate 31, causing the M-type spring plate 31 to be compressed and squeeze the air chamber 33. The gas in the air chamber 33 is blown out through the exhaust hole 311 to the surface of the heat dissipation ceramic plate 11, so as to reduce the surface temperature of the heat dissipation ceramic plate 11 and increase the heat dissipation efficiency.

[0043] When the temperature of the heat sink 11 decreases, it causes the magnetic ring 2 and its internal thermal expansion bladder 221 to cool down. The thermal expansion bladder 221 retracts, and under the elastic force of the M-shaped spring plate 31, it squeezes the liquid chamber 34 and pushes the heat dissipation liquid inside it back into the annular channel 5 and the heat dissipation column bladder 4 to carry out circulating heat dissipation. This reduces the heat generated by the magnetic ring 2 during operation, prevents the magnetic ring 2 from being at high temperature and reducing its electromagnetic interference resistance, and improves its operational stability. It has market prospects and is suitable for promotion and application.

[0044] It should be noted that, in this embodiment, the thermal expansion bladder 221 is fixed to the axial hole 22 by thermally conductive silicone. The thermal expansion bladder 221 is filled with thermal expansion gas, which is carbon dioxide gas. The heat dissipation liquid is an alcohol solution. The inner walls of the liquid tank 34 and the annular channel 5 are both fixed with metal sponge layers, which are made of copper. The amount of heat dissipation liquid filling the liquid tank 34, the annular channel 5 and the heat dissipation column bladder 4 is not less than half of the total volume of the three.

[0045] By designing a metal sponge layer, the heat dissipation liquid in the annular channel 5 and liquid tank 34 can adhere to the metal sponge layer through heating and evaporation, further improving the performance of self-heating.

[0046] Example 2:

[0047] This invention provides a manganese-zinc ferrite magnetic ring resistant to high-temperature interference. Please refer to [link / reference]. Figure 1-11 Components that are the same as or corresponding to those in Embodiment 1 are referred to by the same reference numerals as those in Embodiment 1. For the sake of simplicity, only the differences from Embodiment 1 will be described below:

[0048] In this embodiment, the heat sink 11 is provided with multiple heat dissipation microholes. The heat sink 11 is bonded to the outside of the sheath 1 by thermally conductive silicone. The output end diameter of the exhaust port 311 is smaller than the input end diameter.

[0049] By using a heat dissipation ceramic plate 11 with heat dissipation micropores and an exhaust port 311 with an output end diameter smaller than the input end diameter, when the M-type spring plate 31 is compressed and the gas in the air chamber 33 is forced out, the flow rate will increase. The flow rate is fast and the cross-section is small, which generates turbulence. This will "attract" the surrounding air to flow in, causing the overall temperature of the airflow to drop rapidly. Combined with the heat dissipation micropore design, the heat dissipation ceramic plate 11 can be cooled down quickly under the airflow discharged from the exhaust port 311.

[0050] Among them, one side of the two sheaths 1 rotates through a rotating shaft, and the other side of the two sheaths 1 is provided with a locking buckle 13. The mating seams of the two sets of sheaths 1 and the mating seams of the magnetic ring 2 are arranged in a cross shape. That is, the heat exchange chamber 3 is located in the middle of the inner side of the sheath 1. A sealing ring 12 is fixed on the side of the sheath 1 that contacts the wire. The sealing ring 12 forms a sealed space between the sheath 1 and the wire by abutting against the outer wall of the wire.

[0051] The design of the sleeve 1 with the locking buckle 13 and sealing ring 12 makes the sleeve 1 less susceptible to external temperature influence, thus preventing heat exchange between the external temperature and the magnetic ring 2 and improving its resistance to temperature interference. The locking buckle 13 design enables quick assembly and installation of the sleeve 1 and the magnetic ring 2, thereby improving the convenience of maintenance.

[0052] The above description is only the best implementation method adopted in this application in combination with current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A manganese-zinc ferrite magnetic ring resistant to high-temperature interference, comprising two sets of magnetic rings (2) oppositely sleeved on the outside of a conductor, characterized in that, The magnetic ring (2) has heat-conducting grooves (21) on both sides. The magnetic ring (2) has a number of axial holes (22) evenly distributed at an angle along the arc direction of the heat-conducting grooves (21). The axial holes (22) are through holes and the axial holes (22) connect the heat-conducting grooves (21) on both sides of the magnetic ring (2). The opposite ends of the two sets of magnetic rings (2) are provided with mating grooves (23). The two sets of magnetic rings (2) are provided with a fixing module on the outside for covering and fixing them to the cable. The fixing module includes two sets of sheaths (1). The sheaths (1) are semi-circular ring structures. The inner wall of the sheaths (1) is provided with an annular channel (5) corresponding to the heat-conducting groove (21). Several heat dissipation bladders (4) matching the axial hole (22) are fixed on the annular channel (5). The annular channel (5) is connected to the heat dissipation bladders (4). The heat dissipation bladders (4) extend into the axial hole (22). Thermal expansion bladders (221) are fixed between the heat dissipation bladders (4) in the same axial hole (22). The outer side of the sheath (1) is bonded with a heat dissipation ceramic plate (11). The heat dissipation ceramic plate (11) and the annular channel (5) are heat-transferred through thermally conductive adhesive. The inner side of the sheath (1) is fixed with a heat exchange chamber (3). The heat exchange chamber (3) is provided with an M-shaped spring plate (31). The M-shaped spring plate (31) divides the heat exchange chamber (3) into an isolated gas chamber (33) and a liquid chamber (34). The liquid chamber (34) is connected to the annular channel (5). The liquid chamber (34), the annular channel (5) and the heat dissipation column (4) are all filled with heat dissipation liquid. The gas chamber (33) is connected to the heat dissipation ceramic plate (11) through a connecting block (32). The M-shaped spring plate (31) is provided with an exhaust hole (311) for introducing the gas in the gas chamber (33) into the heat dissipation ceramic plate (11).

2. The high-temperature interference resistant manganese-zinc ferrite magnetic ring according to claim 1, characterized in that, The thermal expansion bladder (221) is fixed to the axial hole (22) by thermally conductive silicone. The thermal expansion bladder (221) is filled with thermal expansion gas, which is carbon dioxide gas.

3. The high-temperature interference resistant manganese-zinc ferrite magnetic ring according to claim 1, characterized in that, The heat dissipation fluid is an alcohol solution, and the inner walls of the liquid tank (34) and the annular channel (5) are both fixed with a metal sponge layer.

4. The high-temperature interference resistant manganese-zinc ferrite magnetic ring according to claim 3, characterized in that, The metal sponge layer is made of copper, and the amount of heat dissipation liquid filling the liquid tank (34), the annular channel (5) and the heat dissipation column (4) is not less than one-half of the total volume of the three.

5. The high-temperature interference resistant manganese-zinc ferrite magnetic ring according to claim 1, characterized in that, The M-shaped spring sheet (31) is covered with an elastic membrane on the outside, which is used to separate the sealed air chamber (33) and the liquid chamber (34).

6. The high-temperature interference resistant manganese-zinc ferrite magnetic ring according to claim 5, characterized in that, The M-type spring sheet (31) is a fatigue-resistant copper spring sheet structure, and the M-type spring sheet (31) has an elastic force to prevent its two sides from getting close together.

7. The high-temperature interference resistant manganese-zinc ferrite magnetic ring according to claim 1, characterized in that, One side of the two sheaths (1) rotates via a pivot, and the other side of the two sheaths (1) is provided with a latch (13).

8. The high-temperature interference resistant manganese-zinc ferrite magnetic ring according to claim 1, characterized in that, The heat dissipation ceramic plate (11) is provided with multiple heat dissipation micro-holes. The heat dissipation ceramic plate (11) is bonded to the outside of the sheath (1) by thermally conductive silicone. The output end aperture of the exhaust port (311) is smaller than the input end aperture.

9. A manganese-zinc ferrite magnetic ring resistant to high-temperature interference according to claim 1, characterized in that, The mating seams of the two sets of sheaths (1) and the mating seams of the magnetic ring (2) are arranged in a cross shape, that is, the heat exchange chamber (3) is located in the middle of the inner side of the sheath (1).

10. A manganese-zinc ferrite magnetic ring resistant to high-temperature interference according to claim 1, characterized in that, A sealing ring (12) is fixed on the side of the sheath (1) that contacts the wire. The sealing ring (12) forms a sealed space between the sheath (1) and the wire by abutting against the outer wall of the wire.

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