CN111933407B

CN111933407B - Low-temperature-rise micro-heat-dissipation runner magnetic core

Info

Publication number: CN111933407B
Application number: CN202010602959.8A
Authority: CN
Inventors: 邓惠峰; 吴振杰; 张霞萍; 汪朝强; 许铭杰; 严晓明
Original assignee: Haining Kangming Electronic Co ltd
Current assignee: Haining Kangming Electronic Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2022-09-30
Anticipated expiration: 2040-06-29
Also published as: CN111933407A

Abstract

The invention discloses a low-temperature-rise micro-heat-dissipation flow channel magnetic core which comprises a base, side columns and a middle column, wherein a non-through middle column groove is formed in the top of the middle part of the base corresponding to the middle column, the middle column groove is a horn mouth groove, a through connecting column hole I is formed in the middle of the middle column groove downwards, a through connecting column hole II is also formed in the middle of the middle column corresponding to the connecting column hole I, a matched connecting column is inserted into the formed connecting column hole, three-way heat-conducting grooves which are communicated with the middle column groove and penetrate through the base are formed in the inner sides of the two side columns on the base, a plurality of heat-dissipation micro-grooves are formed in the bottom of the middle column, one ends of the heat-dissipation micro-grooves are communicated with the connecting column hole I, and the other ends of the heat-dissipation micro-grooves extend to the lower part of the three-way heat-conducting grooves. According to the low-temperature-rise micro-radiating runner magnetic core, the center column is detachably arranged, so that the uniformity of the density of a processed core column can be ensured, and winding is convenient; the center pillar and the base are provided with the micro-channel, so that heat dissipation can be better realized under the condition that the winding and the magnetic flux of the magnetic core are not influenced.

Description

Low-temperature-rise micro-heat-dissipation runner magnetic core

Technical Field

The invention relates to the technical field of magnetic cores, in particular to a low-temperature-rise micro-cooling runner magnetic core.

Background

Magnetic cores are sintered magnetic metal oxides composed of various iron oxide mixtures, and ferrite cores are used in the prior art in coils and transformers for various electronic devices.

The core generates a large amount of heat during use, so that the heat dissipation capability is one of the important factors affecting the performance of the core, and the conventional E-shaped core has a relatively better heat dissipation space than other types of cores, but the heat dissipation of the center pillar is still affected by the two side pillars.

In addition, because the surface areas of the center pillar and the side pillars are different, the pressure applied to the center pillar and the side pillars is different in the press forming process, namely, the compaction density of the center pillar and the side pillars is different, and the situation of deformation and the like easily occurs in the sintering process, so that the situation can be improved only by reducing the diameter of the center pillar, but the magnetic core thickness is increased.

In the prior art, when the bottom plate of the magnetic core is provided with the groove for extrusion molding, the middle column is stressed independently, the pressure of the middle column is increased, and the condition that the density of the middle column is insufficient can be improved. However, this solution is not optimized for the overall core assembly and therefore needs improvement.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, one object of the present invention is to provide a low temperature rise micro-heat dissipation flow channel magnetic core, wherein a center pillar is detachably disposed, so that the center pillar can be processed independently, uniformity of density of the processed center pillar can be ensured, and winding can be performed conveniently; the center pillar and the base are provided with the micro-channel, so that heat dissipation can be better realized under the condition that the winding and the magnetic flux of the magnetic core are not influenced.

The technical scheme of the invention is as follows:

a low-temperature rise micro-heat dissipation runner magnetic core, which comprises a base, side columns fixed on two sides of the base and a middle column fixed in the middle of the base, a middle post groove which is not communicated is arranged at the top of the middle part of the base corresponding to the middle post, the middle post groove is a bell mouth groove, a first communicated connecting post hole is arranged downwards in the middle of the middle post groove, a through connecting column hole II is also arranged in the middle part of the middle column corresponding to the connecting column hole I, a connecting column with the matched height and diameter is inserted in the connecting column hole formed by the connecting column hole I and the connecting column hole II, the inner sides of the two side columns on the base are provided with three-way heat conducting grooves which are communicated with the middle column groove and run through the base, and a plurality of heat dissipation micro-grooves are formed in the bottom of the middle column groove, one ends of the heat dissipation micro-grooves are communicated with the connecting column holes, and the other ends of the heat dissipation micro-grooves extend to the lower part of the three-way heat conduction groove.

Further, the angle alpha of the flaring of the bell-mouth groove is not more than 2 degrees.

Furthermore, the groove surfaces of the three-way heat conduction grooves are in arc transition.

Further, the lateral wall bottom of spliced pole has been seted up the joint and has been agreed with the groove, the joint is agreed with the groove and is the recess of from top to bottom indent slope, corresponds the joint is agreed with the groove and is in the base the lateral wall bottom integrated into one piece of spliced pole hole one has the convex joint of matcing from bottom to top and follows the piece outward.

Further, the width of the clamping wedge slot is larger than that of the clamping wedge block.

Furthermore, the groove depth of the joint wedge groove is slightly lower than the side wall of the connecting column, the upper part of the joint wedge groove is arranged on the connecting column and provided with a heat conduction chute which is communicated with the connecting column and is concave inwards from bottom to top, the groove depth of the heat conduction chute is slightly lower than the surface of the connecting column, and the heat conduction chute correspondingly extends to the heat dissipation microgroove and flushes.

Furthermore, a limiting protrusion is arranged between the clamping wedge groove and the heat conduction chute and used for abutting against the clamping wedge block, and the depth of the limiting protrusion is lower than the surface of the connecting column and higher than the height of the clamping wedge groove.

Furthermore, the top of the connecting column is integrally formed with a limiting block, a limiting groove is correspondingly formed in the top of the central column, and the second connecting column hole is formed in the bottom of the limiting groove.

Further, center pillar side lower part corresponds the tee bend heat conduction groove is seted up the heat dissipation annular of high matching the heat dissipation annular lower part is seted up the center pillar heat conduction chute that is linked together by supreme indent down, center pillar heat conduction chute with the heat dissipation micro-groove is close to the one end position correspondence of tee bend heat conduction groove and can be linked together and form the miniflow way.

The invention has the following beneficial effects: the base is provided with the expanded center post groove, the heat dissipation micro-groove is formed in the center post groove, the heat of the center post can be conveniently led out by matching with the three-way heat conduction groove, and meanwhile, the three-way heat conduction groove is arranged, so that air convection is formed while the strength of the base is not influenced, and the heat on the center post can be also led out; the middle column in the middle of the connecting magnetic core can be conducted by arranging the clamping wedge groove and the heat conducting chute, communicating with the heat radiating micro-groove and matching with the tee heat conducting groove; the heat dissipation ring groove is formed in the middle column, and the middle column heat conduction chute is formed in the middle column, so that the overall heat conduction performance can be further enhanced;

the middle column and the base are detachably arranged, so that the split processing is convenient, the density of the magnetic core can be ensured, the middle column groove and the connecting column hole are arranged on the base, the middle part can apply certain pressure when the pressing is also convenient, the strength of the base is ensured, and similarly, the connecting column hole is arranged in the middle part of the middle column, so that the core part can also apply pressure when the pressing is formed; the clamping wedge groove is formed in the connecting column, and the clamping wedge block is arranged on the connecting column hole in the base, so that the fixing stability of the connecting column can be ensured, and meanwhile, the connecting column has better integrity; can support through setting up the stopper the center pillar, consequently need not to be higher to the machining precision in spliced pole and spliced pole hole, also guaranteed the connection reliability to the center pillar.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a low temperature rise micro heat dissipation runner magnetic core according to the present invention;

FIG. 2 is a schematic cross-sectional view of the base of FIG. 1;

FIG. 3 is a schematic view of a modified version of the connecting column of FIG. 1;

FIG. 4 is a schematic structural view of the base corresponding to the connecting column in FIG. 3;

FIG. 5 is a schematic structural view of another modification of the connecting column of FIG. 2;

FIG. 6 is an enlarged view of the structure at B in FIG. 5;

FIG. 7 is a schematic view of a modified embodiment of the connecting stud and center post of FIG. 5;

fig. 8 is an enlarged schematic view of a portion a in fig. 7.

In the figure: 1-a base; 11-a middle column groove; 111-heat dissipation micro-grooves; 12-connecting the column hole one; 121-clamping wedge blocks; 13-three-way heat conducting groove; 2-side column; 3-a center pillar; 31-connecting column hole two; 32-a limiting groove; 33-a heat dissipation ring groove; 34-a center pillar heat conducting chute; 4-connecting a column; 41-card wedge slot; 42-a limit bump; 43-heat conducting chute; 44-a limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring to fig. 1 and 2, the low temperature rise micro-heat dissipation flow channel magnetic core comprises a base 1, side columns 2 fixed on two sides of the base 1 and a center column 3 fixed in the middle of the base 1, wherein a non-through center column groove 11 is formed in the top of the middle of the base 1 corresponding to the center column 3, the center column groove 11 is a horn mouth groove, the flaring angle alpha of the horn mouth groove is not more than 2 degrees, and the horn mouth groove is formed, so that a heat dissipation gap can exist between the center column 3 and the center column groove 11 conveniently; the middle part of the middle column groove 11 is downwards provided with a through connecting column hole I12, the middle part of the middle column 3 is also provided with a through connecting column hole II 31 corresponding to the connecting column hole I12, a connecting column 4 with matched height and diameter is inserted in a connecting column hole formed by the connecting column hole I12 and the connecting column hole II 31 in an interference manner, the inner sides of the two side columns 2 on the base 1 are provided with a three-way heat conduction groove 13 communicated with the middle column groove 11 and communicated with the base 1, the groove surface of the three-way heat conduction groove 13 is in arc transition, the bottom of the middle column groove 11 (at equal intervals) is provided with a plurality of heat dissipation micro grooves 11 (the heat dissipation micro grooves 11 can be linear grooves or curved grooves), one end of each heat dissipation micro groove 111 is communicated with the connecting column hole I12, and the other end of each heat dissipation micro groove 111 extends to the lower part of the three-way heat conduction groove 13.

Obviously, the height of the connecting column 4 is the same as that of the magnetic core, and the connecting column 4 and the two connecting column holes have a certain interference value, so that the clamping connection is firm, and similarly, the middle column 3 and the middle column groove 11 also have a certain interference value, so that the connection firmness is ensured; the central column and the base are detachably arranged, so that the central column and the base are convenient to separate and process, and the density of the magnetic core can be ensured; set up the outer center pillar groove 11 that expands on base 1 to set up heat dissipation microgroove 111 on center pillar groove 11, cooperation tee bend heat conduction groove 13 can be convenient derive the heat of center pillar 3, set up tee bend heat conduction groove 13 simultaneously when not influencing base 1 intensity, form the air convection, also can promote the heat on the center pillar to derive.

Refer to fig. 3 and fig. 4, in order to guarantee the reliability that spliced pole 4 connects, the joint contract groove 41 has been seted up to lateral wall bottom at spliced pole 4, the groove is contracted for the joint to 41 is the recess of from top to bottom indent slope, it has the joint contract piece 121 that matches to correspond joint contract groove 41 at the lateral wall bottom integrated into one piece of the spliced pole hole 12 of base 1 (the joint contract piece 121 is by the outside convex slope fixture block of supreme down), the groove width in joint contract groove 41 is greater than the width that the joint contracts piece 121, can with reserve out certain heat dissipation space.

When inserting spliced pole 4 downwards, the joint is agreed with

piece

121 and 41 joint firmly of joint contract gradually with the joint, has higher interference value, can guarantee the fixed stability of spliced pole 4, simultaneously, has better wholeness.

Further refer to fig. 5 and 6, for the convenience of heat conduction of the connection column 4, the groove depth of the clamping conjunction groove 41 is slightly lower than the side wall of the connection column 4, a heat conduction chute 43 which is communicated with and is concave from bottom to top is arranged on the connection column 4 at the upper part of the clamping conjunction groove 41 (the depth of the heat conduction chute 43 is slightly lower than the surface of the connection column 4, and the heat conduction is facilitated), the heat conduction chute 43 is correspondingly extended to the heat dissipation microgroove 111 to be flush, namely, after the connection column 4 is inserted into the connection column hole one 12, the top height of the heat conduction chute 43 is adapted to the heat dissipation microgroove 11, and the conduction can be realized. In order to ensure the reliability of the connecting column 4 clamped into the first connecting column hole 12 and matched with the clamping wedge 121, a limiting bulge 42 is further arranged between the clamping wedge groove 41 and the heat conduction chute 43 and used for abutting against the clamping wedge 121 to play a limiting role, the depth of the limiting bulge 42 is lower than the surface of the connecting column 4 and is higher than the height of the clamping wedge groove 41, and air can circulate while clamping is ensured. Through setting up joint groove 41, heat conduction chute 43 to communicate with heat dissipation microgroove 111, cooperation tee bend heat conduction groove 13 can carry out the heat conduction to magnetic core middle part center pillar, and traditional magnetic core obviously does not have above-mentioned characteristics.

Referring to fig. 7, in order to fix the center pillar 3 to the base 1, a stopper 44 is integrally formed on the top of the connecting pillar 4, a stopper groove 32 is correspondingly formed on the top of the center pillar 3, and the second connecting pillar hole 31 is formed on the bottom of the stopper groove 32. The stopper 44 is disposed to abut against the center pillar 3, so that the processing accuracy of the connecting post 4 and the second connecting post hole 31 does not need to be high.

Referring to fig. 8, in order to form a flow channel with the heat conducting chute 43, the heat dissipating micro-groove 111, and the three-way heat conducting groove 13, a heat dissipating ring groove 33 with a height matching with the three-way heat conducting groove 13 is formed in the lower portion of the side surface of the center pillar 3 (the height of the heat dissipating ring groove 33 is not higher than the upper surface of the base 1, so as to avoid influencing the wire winding, and the groove depth is shallow), a center pillar heat conducting chute 34 which is communicated with the lower portion of the heat dissipating ring groove 33 and is recessed from bottom to top is formed in the lower portion of the heat dissipating ring groove 33, and the heat conducting chute 34 corresponds to one end of the heat dissipating micro-groove 111 close to the three-way heat conducting groove 13 and can be communicated to form a micro-flow channel, so as to further enhance the overall heat conducting performance.

In the present application, the structures and the connection relations that are not described in detail are all the prior art, and the structures and the principles thereof are known in the prior art and are not described herein again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a low temperature rises heat dissipation runner magnetic core a little, includes the base, fixes the side post in the base both sides and fixes the center pillar in the middle part of the base, its characterized in that: the heat dissipation device comprises a base, a center pillar, a connecting pillar, a center pillar groove, a connecting pillar hole I, a connecting pillar hole II, a connecting pillar, a plurality of heat dissipation micro grooves and a heat dissipation device, wherein the center pillar groove is formed in the middle of the base corresponding to a center pillar, the center pillar groove is a horn mouth groove, the center pillar groove is formed in the middle of the center pillar in the downward direction, the connecting pillar hole I is communicated with the center pillar, the connecting pillar hole II is also formed in the middle of the center pillar corresponding to the connecting pillar hole I, the connecting pillar hole I is inserted into a connecting hole formed by the connecting pillar hole I and the connecting pillar hole II, the connecting pillar is matched with the connecting pillar hole I in height and diameter, the three-way heat conduction grooves are formed in the inner sides of the side pillars on the base, the center pillar groove bottom is provided with the plurality of heat dissipation micro grooves, one end of each heat dissipation micro groove is communicated with the connecting pillar hole I, and the other end of each heat dissipation micro groove extends to the lower portion of the three-way heat conduction groove.

2. The low temperature rise micro heat dissipation flow channel magnetic core of claim 1, wherein: the angle alpha of the flaring of the bell mouth groove is not more than 2 degrees.

3. The low temperature rise micro heat dissipation flow channel magnetic core according to claim 1 or 2, wherein: the groove surfaces of the three-way heat conduction grooves are in arc transition.

4. The low temperature rise micro heat dissipation flow channel magnetic core according to claim 1 or 2, wherein: the lateral wall bottom of spliced pole has been seted up the joint and has been agreed with the groove, the joint is agreed with the groove and is the recess of from top to bottom indent slope, corresponds the joint is agreed with the groove and is in the base the lateral wall bottom integrated into one piece of spliced pole hole one has the convex joint of matcing from bottom to top and decides the piece outward.

5. The low temperature rise micro heat dissipation flow channel magnetic core of claim 4, wherein: the width of the clamping wedge groove is larger than that of the clamping wedge block.

6. The low temperature rise micro heat dissipation flow channel magnetic core of claim 5, wherein: the groove depth of joint agrees with the groove and is slightly less than the lateral wall of spliced pole joint agrees with groove upper portion in set up the heat conduction chute that is linked together and by supreme indent down on the spliced pole, heat conduction chute groove depth is slightly less than the spliced pole surface, what the heat conduction chute corresponds extends to the heat dissipation microgroove flushes.

7. The low temperature rise micro heat dissipation flow channel magnetic core according to claim 6, wherein: still be provided with spacing arch between joint contract groove and heat conduction chute and be used for to establish the joint contract piece, spacing protruding degree of depth is less than the surface of spliced pole but is higher than the height in joint contract groove.

8. The low temperature rise micro heat dissipation flow channel magnetic core according to any one of claims 5 to 7, wherein: the top of the connecting column is integrally formed with a limiting block, the top of the central column is correspondingly provided with a limiting groove, and the second connecting column hole is formed in the groove bottom of the limiting groove.

9. The low temperature rise micro heat dissipation flow channel magnetic core of claim 7, wherein: the heat dissipation annular that highly matches is seted up to center pillar side lower part correspondence the tee bend heat conduction groove set up the center pillar heat conduction chute by supreme indent down that is linked together in heat dissipation annular lower part, center pillar heat conduction chute with the heat dissipation micro-channel is close to the one end position correspondence of tee bend heat conduction groove and can be linked together and forms the miniflow channel.