CN111933407A

CN111933407A - Low-temperature-rise micro-heat-dissipation runner magnetic core

Info

Publication number: CN111933407A
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: 2020-11-13
Anticipated expiration: 2040-06-29
Also published as: CN111933407B

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 is formed in the middle of the middle column groove downwards, a through connecting column hole is also formed in the middle of the middle column corresponding to the connecting column hole, matched connecting columns are inserted into the two connecting column holes, 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 groove, one ends of the heat-dissipation micro-grooves are communicated with the connecting column holes. 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 during the press forming process is different, that is, the compaction densities of the center pillar and the side pillars are different, and the deformation and the like are easy to occur during the sintering process, so that the situation can be improved only by reducing the diameter of the center pillar, but the thickness of the magnetic core 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:

the utility model provides a low temperature rises heat dissipation runner magnetic core a little, includes the base, fixes the side column in the base both sides and fixes the center pillar at the base middle part top corresponds the center pillar and sets up the center pillar groove that does not link up, the center pillar groove is the horn mouth groove the center pillar groove middle part is seted up the connecting post hole that link up downwards, corresponds the connecting post hole that link up also has been seted up at the center pillar middle part in the connecting post hole, two the downthehole spliced pole that is equipped with height and diameter matching of inserted of spliced pole on the base in two the inboard of side column seted up with center pillar groove intercommunication and link up the tee bend heat conduction groove of base a plurality of heat dissipation microgrooves have been seted up to center pillar tank bottom, heat dissipation microgroove one end with connecting post hole intercommunication, and the other end of heat dissipation microgroove extends to the below of tee bend heat.

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 in spliced pole hole has the convex joint of matcing from bottom to top and follows the piece outward.

Furthermore, the width of the clamping wedge groove 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, the top of the central column is correspondingly provided with a limiting groove, and the connecting column hole is arranged at the bottom of the limiting groove.

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

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 during pressing, and the strength of the base is ensured; 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 structural view of a modified version of the connecting column and center pillar 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 post holes; 121-clamping wedge blocks; 13-three-way heat conducting groove; 2-side column; 3-a center pillar; 31-connecting post holes; 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 12, the middle part of the middle column 3 is also provided with a through connecting column hole 31 corresponding to the connecting column hole 12, the two connecting column holes are internally inserted with connecting columns 4 with matched height and diameter in an interference manner, the inner sides of the two side columns 2 on the base 1 are provided with three-way heat conducting grooves 13 which are communicated with the middle column groove 11 and run through the base 1, the groove surfaces of the three-way heat conducting grooves 13 are 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 straight line grooves or curved grooves), one ends of the heat dissipation micro grooves 11 are communicated with the connecting column holes 12, and the other ends of the heat dissipation micro grooves 11 extend to.

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; the base 1 is provided with the expanded center pillar groove 11, the heat dissipation micro-groove 111 is formed in the center pillar groove 11, the tee-joint heat conduction groove 13 is matched to lead out heat of the center pillar 3 conveniently, meanwhile, the tee-joint heat conduction groove 13 is arranged to form air convection when strength of the base 1 is not affected, and heat conduction on the center pillar can be promoted.

Referring to fig. 3 and 4, in order to ensure the reliability of connection of the connection column 4, a clamping wedge groove 41 is formed in the bottom of the side wall of the connection column 4, the clamping wedge groove 41 is a groove which is concavely inclined from top to bottom, a matched clamping wedge 121 (the clamping wedge 121 is an inclined clamping block which protrudes outwards from bottom to top) is formed in the bottom of the side wall of the connection column hole 12 of the base 1 correspondingly to the clamping wedge groove 41, the groove width of the clamping wedge groove 41 is greater than the width of the clamping wedge 121, and a certain heat dissipation space can be reserved.

When inserting spliced pole 4 downwards, the joint agrees with piece 121 and joint agrees with the groove 41 joint firmly 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 post 4, the groove depth of the joint wedge groove 41 is slightly lower than the side wall of the connection post 4, the heat conduction chute 43 which is communicated with and is from bottom to top concave is arranged on the connection post 4 at the upper part of the joint wedge groove 41 (the depth of the heat conduction chute 43 is slightly lower than the surface of the connection post 4, the heat conduction is convenient), the heat conduction chute 43 corresponds to extend to the heat dissipation micro-groove 111 to flush, namely, after the connection post 4 is inserted into the connection post hole 21, the top height of the heat conduction chute 43 is adapted to the heat. In order to ensure the reliability of the connecting column 4 clamped into the connecting column hole 21 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 when clamping is ensured. Through setting up joint contract groove 41, heat conduction chute 43 to communicate with heat dissipation microgroove 111, cooperation tee bend heat conduction groove 13 can be to even magnetic core middle part center pillar heat conduction, 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 connecting pillar hole 31 is formed at the bottom of the stopper groove 32. The stopper 44 is provided to abut against the center pillar 3, so that the machining accuracy of the connecting post 4 and the 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.

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 groove, a connecting pillar hole, a connecting pillar hole, a connecting pillar and a connecting pillar hole, wherein the center pillar groove is formed in the middle of the base, the connecting pillar hole is communicated with the connecting pillar hole, the connecting pillar hole is formed in the inner side of the side pillar, the connecting pillar hole is communicated with the connecting pillar hole.

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 in spliced pole hole has the convex joint piece of agreeing with by supreme outside down of matcing.

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 the clamping wedge groove is slightly lower than the side wall of the connecting column, the upper part of the clamping wedge groove is arranged on the connecting column and is 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 micro-groove and is flushed.

7. The low temperature rise micro heat dissipation flow channel magnetic core of 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 connecting column hole is arranged at the 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.