CN213818682U - Power electronic device - Google Patents

Abstract

The utility model provides a power electronic equipment, include: the support piece comprises a support, wherein the support comprises a radiator mounting surface, a fixing hole and a welding hole; the brake pipe comprises a body and a welding leg led out of the body, the body is assembled on the radiator installation surface, and the welding leg penetrates through the welding hole; the heat conduction insulating film is arranged on the radiator mounting surface and covers the body; a heat sink including a locking portion; and the first fastener penetrates through the fixing hole from one side of the bracket, which is opposite to the mounting surface of the radiator, is matched with the locking part of the radiator assembled on the mounting surface of the radiator, locks and fixes the radiator on the bracket, and tightly presses and fixes the heat-conducting insulating film between the radiator and the body of the brake pipe through the radiator. The embodiment of the utility model provides a fixed in-process of brake pipe installation need not the briquetting part, has avoided the use of long screw.

Description

Power electronic device

Technical Field

The embodiment of the utility model provides a relate to the electrical equipment field, especially relate to a power electronic equipment.

Background

In the current power electronic equipment, the brake pipe is generally assembled by adopting a fixing mode of a heat-conducting insulating film, a pressing block part and a screw. This installation process is complicated, need use positioning device earlier to the brake pipe location usually when the installation, again with two then borders alignments of heat conduction insulating film and radiator, lean on the border location of radiator, the in-process of these location, in case produce the skew, dislocation leads to unable welded problem when can leading to brake pipe and circuit board welding, and the briquetting part still needs the long screw to fix.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem who solves lies in, need long screw fixed pressing block part and the problem that needs location frock to above-mentioned brake pipe installation, provides a new power electronic equipment.

The utility model provides an above-mentioned technical problem's technical scheme be, provide a power electronic equipment, include:

the support piece comprises a support, the support comprises a radiator mounting surface, a fixing hole and a welding hole, the fixing hole and the welding hole are respectively arranged on the radiator mounting surface, and the welding hole is arranged in the heat-conducting positioning groove;

the brake pipe comprises a body and a welding leg led out of the body, the body is assembled on the radiator installation surface, and the welding leg penetrates through the welding hole;

the heat conduction insulating film is arranged on the radiator mounting surface and covers the body;

a heat sink including a locking portion;

and the first fastener penetrates through the fixing hole from one side of the bracket, which is opposite to the mounting surface of the radiator, is matched with the locking part of the radiator assembled on the mounting surface of the radiator, locks and fixes the radiator on the bracket, and tightly presses and fixes the heat-conducting insulating film between the radiator and the body of the brake pipe through the radiator.

As a further improvement of an embodiment of the present invention, a heat-conducting positioning groove is disposed on the heat sink mounting surface, and the welding hole is located in the heat-conducting positioning groove;

the body of the brake pipe is assembled in the heat conduction positioning groove, and the heat conduction insulating film is arranged in the heat conduction positioning groove.

As a further improvement of an embodiment of the present invention, the bracket includes a brake pipe positioning groove, the brake pipe positioning groove is disposed on the radiator mounting surface, and is adjacent to the welding hole.

As a further improvement of an embodiment of the present invention, the bottom wall of the brake pipe positioning groove is provided with at least two bar-shaped holes, at least two bar-shaped holes are respectively followed the long side direction of the bottom wall of the brake pipe positioning groove is arranged, and respectively adjacent to two opposite side walls of the brake pipe positioning groove.

As a further improvement of an embodiment of the present invention, the bracket includes a heat dissipation limiting groove, the fixing hole set in the heat dissipation limiting groove, just the heat sink mounting surface by the bottom wall of the heat dissipation limiting groove constitutes.

As a further improvement of an embodiment of the present invention, the bracket includes a first positioning member located at the radiator mounting surface or at the edge of the radiator mounting surface, and the radiator is assembled to the radiator mounting surface through the first positioning member in a limited manner.

As a further improvement of an embodiment of the present invention, the support includes a second positioning member located in the heat-conducting positioning groove, and the body of the brake pipe passes through the second positioning member is fitted in the heat-conducting positioning groove in a limited manner.

As a further improvement of an embodiment of the present invention, the body of the brake pipe is provided with a positioning hole, and the second positioning member is formed by a positioning protrusion formed in the heat-conducting positioning groove and adapted to the positioning hole.

As a further improvement of an embodiment of the present invention, the supporting member includes a base; the bracket comprises a second fastener, and the second fastener is fixedly connected to the bracket; the base comprises a third fastener, and the third fastener is elastically connected to the base; the heat sink is fixedly connected between the second fastener and the third fastener.

As a further improvement of an embodiment of the present invention, a plurality of fool-proof posts are provided on the radiator mounting surface, and the radiator is provided with fool-proof holes adapted to the fool-proof posts.

As a further improvement of an embodiment of the present invention, the first fastening member is a screw, and the locking portion of the heat sink is formed by a threaded hole; alternatively, the first and second electrodes may be,

the first tightening part is a clamp, and the locking part of the radiator is formed by a clamping hole.

As a further improvement of an embodiment of the present invention, the bracket includes a heat dissipation opening disposed in the heat sink mounting surface;

the power electronic equipment comprises a driving plate which is opposite to the support, the driving plate comprises a plate body and a rectifier bridge which is opposite to the heat dissipation port, and the welding leg of the brake pipe penetrates through the welding hole to be connected with the plate body in a welding mode.

Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has: the radiator is locked and fixed through the first fastener on the side, opposite to the radiator mounting surface, of the support, pressing parts are not needed in the process of mounting and fixing the brake pipe, and the use of long screws is avoided. The embodiment of the utility model provides a still set up the heat conduction insulating groove through the radiator installation face at the support to realize the installation location of heat conduction insulating film by the heat conduction constant head tank, avoid using the location frock, simplified the assembly step of brake pipe greatly.

Drawings

Fig. 1 is a schematic structural diagram of a power electronic device according to an embodiment of the present invention;

fig. 2 is an exploded view of a power electronic device provided by an embodiment of the present invention;

fig. 3 is a front view of a power electronic device provided by an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a schematic structural diagram of a power electronic device with a removed housing according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a power electronic device with a removed housing according to an embodiment of the present invention;

fig. 7 is a schematic view of an installation structure of a support member, a radiator and a brake pipe in a power electronic device according to an embodiment of the present invention;

fig. 8 is a cross-sectional view of a support member, a heat sink and a brake pipe in a power electronic device according to an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 8 at A;

fig. 10 is a schematic structural diagram of a support member in a power electronic device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a surface of a support member facing away from a heat sink in a power electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

An embodiment of the utility model provides a power electronic equipment, this power electronic equipment specifically can be converter, dc-to-ac converter, uninterrupted power source etc.. As shown in fig. 1 to 11, the power electronic device has reasonable layout and compact structure, the positioning effect of the brake pipe is good, no deviation is generated, the welding quality of the brake pipe and the circuit board is improved, and the use of long screws is avoided.

Specifically, as shown in fig. 1 to 4, the power electronic device of the present embodiment includes a support 2 and a housing 1, wherein an installation space having an opening is defined inside the housing 1; the supporting member 2 includes a bottom plate 21 and a bracket 22 perpendicular to each other, the bracket 22 is inserted into the installation space along the opening and divides the installation space into a circuit space 100 and a heat dissipation space 200, the bottom plate 21 covers the opening and is fixedly connected with the housing 1, the bottom plate 21 and the housing 1 can be fixedly connected through a buckle or a bolt 10, and the housing 1 of the embodiment is provided with a cubic structure as shown in fig. 1 or fig. 2.

To clearly express the position and direction described in the present embodiment, the direction of the housing 1 relative to the support 2 is defined as front, and the opposite direction is defined as back, that is, the bracket 22 is inserted into the installation space from back to front, and the height of the power electronic device can also be defined by the front to back direction; the defining bracket 22 extends in the vertical direction, and defines the two sides of the installation space as the left side and the right side, respectively, in this embodiment, the circuit space 100 is set to the right side, the heat dissipation space 200 is set to the left side, and certainly, the left and right directions can be replaced; the horizontal plane is defined as the front, back, left and right surfaces, the vertical direction is vertical to the horizontal plane, and the horizontal plane is only defined by one name and is not limited to be horizontal in the sense of physics; of course, in the preferred embodiment, the vertical direction is parallel to the vertical direction of the physics (i.e., with reference to the direction of gravity), and the horizontal plane is correspondingly parallel to the horizontal plane in the physics.

The power electronic equipment further comprises a driving plate 4 fixedly connected with the supporting piece 2 and arranged inside the shell 1, and a heat dissipation assembly 7 arranged in the heat dissipation space 200, wherein the support 22 comprises a heat dissipation port 222 and a supporting hole 221, the driving plate 4 comprises a brake pipe 42 and a rectifier bridge 43 which are arranged opposite to the heat dissipation port 222, and the heat dissipation assembly 7 covers the heat dissipation port 222, so that on one hand, the heat of the brake pipe 42 and the rectifier bridge 43 which generate more heat on the driving plate 4 is transmitted to the heat dissipation assembly 7 through the heat dissipation port 222, the heat is timely removed, temperature accumulation is avoided, on the other hand, the heat dissipation space 200 is separated from the circuit space 100 by the support 22, and effective heat dissipation is guaranteed while the driving plate 4 is separated from the heat dissipation space 200.

Further, as shown in fig. 2, 4 and 5, the heat dissipation assembly 7 includes a fan 72 and a heat sink 71, the heat sink 71 includes a heat dissipation bottom plate 712 and a plurality of heat dissipation fins 711 parallel to each other, the heat dissipation bottom plate 712 covers the heat dissipation opening 222, two sides of the fan 72 are respectively an air inlet side and an air outlet side, two ends of the extension direction of the heat dissipation fins 711 are respectively an air inlet end and an air outlet end, the housing 1 includes ventilation holes opposite to the air outlet side and the air inlet end, and the air inlet side faces the air outlet end and the capacitor 62.

With reference to fig. 6 to 11, in the power electronic device according to the real-time embodiment of the present invention, the side of the bracket 22 facing away from the drive board 4 is provided with the heat sink mounting surface 26, the fixing hole 262, the heat-conducting positioning groove 25, and the welding hole 24, and the fixing hole 262 and the heat-conducting positioning groove 25 are respectively disposed on the heat sink mounting surface 26, and the welding hole 24 is disposed in the heat-conducting positioning groove 25. The brake pipe 42 includes a body 421 and a leg 422 led out from the body 421, wherein the body 421 is assembled in the heat-conducting positioning slot 25, and the leg 422 passes through the welding hole 24 and is welded and fixed with the driving board 4. A heat conductive insulating film 713 is provided in the heat conductive positioning groove 25 and covered on the body 421 of the brake pipe 42 through the heat conductive insulating film 713. Also, after the body 421 of the brake pipe 42 is fitted to the heat conductive positioning groove 25, the top surface of the body 421 of the brake pipe 42 is slightly lower than the radiator attachment surface 26, that is, the top surface of the body 421 is recessed with respect to the radiator attachment surface 26.

The heat sink 71 includes a locking portion, and in particular, the locking portion may be provided on the heat radiation base plate 712 of the heat sink 71. Furthermore, the power electronic device of the present invention further includes a first fastening member 715, the first fastening member 715 passes through the fixing hole 262 from the side of the bracket 22 facing away from the radiator mounting surface 26 and engages with the locking portion of the radiator 71 mounted on the radiator mounting surface 26, locks and fixes the radiator 71 on the bracket 22, and presses and fixes the heat conductive insulating film 713 between the radiator 71 and the body 421 of the brake pipe 42 through the radiator 71. In particular, the distance between the top surface of the body 421 of the brake pipe 42 and the radiator mounting surface 26 is smaller than the thickness of the heat conductive insulating film 713, and since the heat conductive insulating film 713 is made of a material having elasticity, when the heat sink 71 and the body 421 press the heat conductive insulating film 713, the heat conductive insulating film 713 is deformed and the gap between the body 421 and the radiator mounting surface 26 is sufficiently filled, thereby improving the heat conduction efficiency. In this way, when the brake pipe 42 is operated, the heat generated in the body 421 is conducted to the heat dissipating bottom plate 712 of the heat sink 7 through the heat conductive insulating film 713, and is discharged through the air passage formed between the heat dissipating fins 711 and the adjacent heat dissipating fins 711 for flowing air.

In the process of assembling the brake pipe 42, the body 421 of the brake pipe 42 is firstly placed in the heat-conducting positioning groove 25, the welding feet 422 penetrate through the welding holes 24 to be welded with the circuit board on the other side of the bracket 22, then the heat-conducting insulating film 713 is placed in the heat-conducting positioning groove 25, an auxiliary positioning tool is not needed to position the heat-conducting insulating film 713, and the brake pipe 42 is completely covered when the heat-conducting insulating film 713 is placed; the radiator 71 is placed on the radiator mounting surface 26 to limit the heat-conducting insulating film 713, and finally the radiator 71 is fixedly connected with the support member 2 through the first fastener 715, so that the positioning and mounting of the brake pipe 42 are realized. Through the mode, the heat-conducting insulating film 713 can be positioned and installed without an independent positioning tool, in addition, the radiator 71 is locked and fixed from one side of the bracket, which is back to the radiator installation surface 26, so that the heat-conducting insulating film 713 is pressed and fixed on the body 421 of the brake pipe 42 through the radiator 71, an independent pressing block part is not needed to be arranged, the part number and the screw variety are reduced, the assembly and the fixation of the brake pipe 42 and the heat-conducting insulating film 713 are easier and more reasonable, the assembly cost is low, and the quick installation can be realized.

Of course, in practical applications, the heat conducting positioning slot 25 may be omitted, i.e., the heat conducting insulating film 713 is directly located on the heat sink mounting surface 26. At this time, when the heat conductive insulating film 713 is mounted, the heat conductive insulating film 713 needs to be positioned and mounted by a positioning tool, or the heat conductive insulating film 713 needs to be enlarged to be aligned with the two side edges of the heat sink 71, that is, the heat conductive insulating film 713 needs to be positioned and mounted by the edges of the heat sink 713.

In an embodiment of the present invention, the first fastening member 715 may be a screw, and the locking portion of the heat sink 71 may be a threaded hole. Since the screws lock and fix the heat sink 71 from the side of the bracket 22 facing away from the heat sink mounting surface 26, and the thickness of the bracket 22 is relatively small, the heat sink 71 can be locked and fixed without using special long screws. In addition, the first fastening part 715 may also be a staple, and accordingly, the locking part on the heat sink 71 may be formed by a clamping hole, and the staple passes through the fixing hole 262 and then is clamped in the clamping hole of the heat sink 71, so as to lock and fix the heat sink 71 and the bracket 22.

In an embodiment of the present invention, the bracket 2 includes a heat dissipation limiting groove, and the heat sink 71 is positioned and mounted through the heat dissipation limiting groove. Accordingly, the radiator mounting surface 26 is formed by the bottom wall of the heat dissipation limiting groove, and the fixing hole 262 and the heat conduction positioning groove 25 are respectively disposed in the heat dissipation limiting groove.

The heat sink 71 may be positioned and mounted by providing the first positioning member on the bracket 22. The first positioning member is located on the heat sink mounting surface 26, and accordingly, the heat dissipation bottom plate 712 of the heat sink 71 has a structure matched with the first positioning member, so that the first positioning member is matched with the first positioning member to realize the mounting and positioning of the heat sink 71.

Specifically, the first positioning member may be formed by one or more protruding columns on the heat sink mounting surface 26, the heat dissipation bottom plate 712 of the heat sink 71 has first positioning holes corresponding to the protruding columns, and the protruding columns and the first positioning holes are used for limiting and mounting the heat sink to the heat sink mounting surface 26. Alternatively, the first positioning member may be a side plate protruding from the heat sink mounting surface 26, and the side of the heat sink bottom plate 712 of the heat sink 71 may be engaged with the side plate to position and mount the heat sink 71.

In addition, as shown in fig. 7, 8 and 11, a second fastening member 223 may be disposed on the bracket 22, and a third fastening member 211 may be disposed on the base 21. The heat sink 71 is fixedly connected between the second fastener 223 and the third fastener 211, the second fastener 223 is fixedly connected to the bracket 22, the third fastener 211 is elastically connected to the base 21, the supporting rib plate 212 extending from the end of the base to the bracket 22 is arranged above the base 21, the heat sink 71 is arranged on the supporting rib plate 212, and the heat sink 71 can be positioned and clamped simultaneously through the second fastener 223, the third fastener 211 and the supporting rib plate 212.

In an embodiment of the present invention, the heat sink mounting surface 26 may further include a plurality of fool-proof posts 261, and correspondingly, the heat sink bottom plate 712 of the heat sink 71 is provided with fool-proof holes coupled with the fool-proof posts 261. Through the cooperation of the fool-proof post 261 and the fool-proof hole, the heat sink 71 is prevented from adversely affecting the heat dissipation effect of the brake pipe 42.

In one embodiment of the present invention, the bracket 22 further includes a brake pipe positioning groove disposed in the heat-conducting positioning groove 25 and disposed adjacent to the welding hole 24, and the body 421 of the brake pipe 42 is assembled in the heat-conducting positioning groove 25 through the positioning groove in a limited manner.

As shown in fig. 11, in an embodiment of the present invention, at least two bar holes 716 may be further disposed in the brake pipe positioning groove, and the bar holes 716 are disposed along the long side direction of the brake pipe positioning groove respectively (i.e. the length direction of the bar holes 716 is perpendicular to the arrangement direction of the welding holes 24), and are adjacent to two opposite side walls of the brake pipe positioning groove respectively. When the body 421 of the brake pipe 42 is mounted to the brake pipe positioning groove, the bottom of the body 421 of the brake pipe 42 abuts against the bottom wall of the brake pipe positioning groove and covers the strip-shaped hole 716. Due to the existence of the strip-shaped hole 716, the brake pipe positioning groove has certain elasticity, so that when the radiator 71 is locked and fixed on the bracket 22, the brake pipe positioning groove can generate certain deformation along the depth direction of the radiator positioning groove, further certain pressure can be continuously applied to the brake pipe, meanwhile, the brake pipe positioning groove can also generate acting force opposite to the deformation direction, so that the brake pipe and the radiator 71 are more attached, and the radiating effect of the brake pipe is further improved; in addition, the bracket 22 can have larger tolerance, and the precision requirement on the brake pipe 42 is reduced. In particular, when there are two bar-shaped holes 716 in the brake pipe positioning slot, the length of each bar-shaped hole 716 may be greater than or equal to the length of the body 421 of the brake pipe 42, e.g., the bar-shaped holes 716 may extend out of the brake pipe positioning slot. In addition, for the diapire pressurized fracture of avoiding the brake pipe constant head tank, the back of the diapire that can brake the pipe constant head tank sets up the strengthening rib, and this strengthening rib is located the inboard in bar hole 716 respectively, is located between two bar holes 716 promptly.

In addition, the body 421 of the brake pipe 42 can be limited and assembled in the heat conducting positioning groove 25 through the second positioning component. The second positioning member is located in the heat-conducting positioning slot 25 of the bracket 22 and is disposed adjacent to the welding hole 24. Specifically, the second positioning hole 423 may be provided in the body 421 of the brake pipe 42, and the second positioning member is constituted by a positioning protrusion 231 in the heat-conducting positioning groove 25 that is fitted into the second positioning hole 423. Alternatively, the second positioning member may be a side plate protruding from the bottom wall of the heat-conducting positioning slot 25, and the side edge of the body 421 of the brake pipe 42 is engaged with the side plate to realize the positioning and installation of the body 421 of the brake pipe 42.

Further, the power electronic device further comprises a control assembly 3 fixedly connected to the outside of the housing 1, the control assembly 3 comprises a control board 31, the housing 1 comprises a control socket 13, the drive board 4 comprises a first control socket 41, the control board 31 comprises a drive socket 311 facing one side of the housing 1, the first control socket 41 is connected to the drive socket 311 through the control socket 13, a drive circuit is arranged on a board body of the drive board 4, and the drive circuit is connected with an external input end and a variable-frequency voltage output end respectively, and can also be connected with a brake resistor and an inverter; the structure of the driving board 4 is as shown in fig. 2 and 4, and a control circuit is disposed on a board body of the control board 31, and is configured to display operating state information of the power electronic device and receive a control signal from a user.

The first control socket 41 of the present embodiment extends from the inner side of the housing 1 through the control socket 13 and then engages with the driving socket 311, and this embodiment is connected in this way; of course, the extension of the control socket 311 into the interior of the housing 1 through the control socket 13 may be reversed to engage the first control socket 41. Since the driving board 4 in the housing 1 is connected with strong electricity and the control board 31 is connected with weak points, the control circuit can be better protected by separating the driving board and the control board.

Further, the power electronic device further includes a plurality of expansion assemblies 5 fixedly connected to the outside of the housing 1, the expansion assemblies 5 include expansion boards 51, the control board 31 includes a plurality of expansion power strips, and the expansion boards 51 include second control power strips 511 connected to the expansion power strips in a matching manner. In fig. 1, 3 to 6 of this embodiment, the control component 3 and the extension component 5 are adjacently disposed on the outer side of the housing 1, two extension components 5 are provided, but the number of the extension components 5 can also be customized according to the size of the power electronic device to be 1, 3, etc., and the type of the extension component 5 can be customized and replaced according to the user's needs, the extension socket 312 is disposed on the left side of the control component 3,

further, the housing 1 includes an end surface 11 disposed opposite to the extension block 5, and the insertion direction of the extension plug row and the second control plug row 511 is parallel to the end surface 11, and in the present embodiment, the extension block 5 is engaged with the extension plug row 312 from the left side to the right side of the control block 3. Due to the general terminal interface, the length in the plugging direction is longer than the length on the plane perpendicular to the terminal interface, and the height of the expansion assembly 5 in the direction perpendicular to the end surface 11 can be reduced by plugging the expansion plug row with the second control row plug 511 along the direction parallel to the end surface 11, that is, the left-right direction instead of the front-back direction, so that the thickness of the whole power electronic equipment is made lower.

Further, the control assembly 3 includes a control cover 32, the expansion assembly 5 includes an expansion cover 52, a lens is disposed on the expansion cover 52 to perform a packaging protection function, the control cover 32 and the expansion cover 52 are both fixedly connected to the housing 1, and the end surface 11 of the housing 1 is rectangular; the length of the control cover 32 is equal to the length of the end face 11, when the extension module 5 is fixedly connected to the housing 1, the total width of the extension cover 52 and the control cover 32 is equal to the width of the end face 11, and when all the extension rows are inserted into the extension module 5, the total length of all the extension covers 52 is equal to the length of the end face 11.

Compared with the prior art, the embodiment has the following beneficial effects:

the power electronic equipment simplifies the production and assembly steps of the brake pipe, does not need the assistance of a pressing block part in the process of installing and fixing the brake pipe, realizes the positioning of the brake pipe, the heat-conducting insulating film and the radiator by utilizing the existing supporting piece, has good positioning effect and can not generate deviation, improves the welding quality of the brake pipe and a circuit board, and avoids the use of long screws.

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 changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A power electronic device, comprising:

the support piece comprises a support, the support comprises a radiator mounting surface, a fixing hole and a welding hole, and the fixing hole and the welding hole are respectively arranged on the radiator mounting surface;

the brake pipe comprises a body and a welding leg led out of the body, the body is assembled on the radiator installation surface, and the welding leg penetrates through the welding hole;

the heat conduction insulating film is arranged on the radiator mounting surface and covers the body;

a heat sink including a locking portion;

and the first fastener penetrates through the fixing hole from one side of the bracket, which is opposite to the mounting surface of the radiator, is matched with the locking part of the radiator assembled on the mounting surface of the radiator, locks and fixes the radiator on the bracket, and tightly presses and fixes the heat-conducting insulating film between the radiator and the body of the brake pipe through the radiator.

2. The power electronic device according to claim 1, wherein a heat-conducting positioning groove for positioning the heat-conducting insulating film is provided on the heat sink mounting surface, and the welding hole is located in the heat-conducting positioning groove;

the body of the brake pipe is assembled in the heat conduction positioning groove, and the heat conduction insulating film is arranged in the heat conduction positioning groove.

3. The power electronic device according to claim 1, wherein the bracket includes a brake pipe positioning groove provided on the heat sink mounting surface adjacent to the welding hole.

4. The power electronic device according to claim 3, wherein the bottom wall of the brake pipe positioning groove is provided with at least two strip-shaped holes, and the at least two strip-shaped holes are respectively arranged along a long side direction of the bottom wall of the brake pipe positioning groove and are respectively adjacent to two opposite side walls of the brake pipe positioning groove.

5. The power electronic device according to claim 1, wherein the bracket includes a heat dissipation limiting groove, the fixing hole is provided in the heat dissipation limiting groove, and the heat sink mounting surface is constituted by a bottom wall of the heat dissipation limiting groove.

6. The power electronic device according to claim 1, wherein the bracket includes a first positioning member at an edge of the heat sink mounting surface or the heat sink mounting surface, and the heat sink is limit-fitted to the heat sink mounting surface by the first positioning member.

7. The power electronic device of claim 2, wherein the bracket includes a second locating member located within the thermally conductive locating slot, the body of the brake pipe being stop fitted within the thermally conductive locating slot by the second locating member.

8. The power electronic device of claim 1, wherein the support comprises a base; the bracket comprises a second fastener, and the second fastener is fixedly connected to the bracket; the base comprises a third fastener, and the third fastener is elastically connected to the base; the heat sink is fixedly connected between the second fastener and the third fastener.

9. The power electronic device according to claim 1, wherein the first fastener is a screw, and the locking portion of the heat sink is constituted by a threaded hole; alternatively, the first and second electrodes may be,

the first tightening part is a clamp, and the locking part of the radiator is formed by a clamping hole.

10. The power electronic device of claim 1, wherein the bracket includes a heat sink disposed within the heat sink mounting face;

the power electronic equipment comprises a driving plate which is opposite to the support, the driving plate comprises a plate body and a rectifier bridge which is opposite to the heat dissipation port, and the welding leg of the brake pipe penetrates through the welding hole to be connected with the plate body in a welding mode.

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