Heat dissipation device of power electronic equipment and photovoltaic inverter

Abstract

The utility model discloses a heat radiation device of power electronic equipment and a photovoltaic inverter, the heat radiation device comprises a heat radiation cover, a fan and a heat radiator, one of the heat radiation cover and the heat radiator is provided with an installation groove, and the other one is provided with a plug connector. And the plug connector is inserted into the mounting groove so as to connect the radiating cover with the radiator. The heat dissipation device is convenient and fast to install and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of power electronics, specifically relates to a heat abstractor of power electronic equipment and photovoltaic inverter. BACKGROUND

[0002] In order to carry out heat dissipation, the back of the box of photovoltaic inverter is generally provided with radiator, heat shield and fan, etc., during assembly, the fan is generally fixed on the heat shield first, and then the heat shield is fixed on the box by screw mode. Since the fan has vibration to produce noise, so the number of fixed screws is more, increases material and assembly cost, and assembly is more difficult, when needing maintenance, it is also difficult to disassemble. CONTENT OF UTILITY MODEL

[0003] In order to solve the above technical problem, the utility model provides heat abstractor of power electronic equipment, and assembly or disassembly is more convenient and fast.

[0004] The utility model also provides a photovoltaic inverter, which is convenient to maintain and improves production line operation efficiency.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of heat abstractor of power electronic equipment, including heat shield, fan and radiator, one of the heat shield and the radiator is provided with mounting groove, and the other is provided with plug connector, the plug connector is inserted into the mounting groove to connect the heat shield and the radiator.

[0007] In a preferred embodiment, the plug connector is provided on the heat shield, and the mounting groove is provided on the radiator.

[0008] In a preferred embodiment, the radiator includes a plurality of heat dissipation fins, the heat dissipation fins include a first heat dissipation fin located at the leftmost side and a second heat dissipation fin located at the rightmost side, the first heat dissipation fin and the second heat dissipation fin have the mounting groove, or the heat dissipation fins include a first heat dissipation fin located at the uppermost side and a second heat dissipation fin located at the lowermost side, the first heat dissipation fin and the second heat dissipation fin have the mounting groove.

[0009] In a preferred embodiment, the heat dissipation fins further include a third heat dissipation fin arranged adjacent to the first heat dissipation fin and a fourth heat dissipation fin arranged adjacent to the second heat dissipation fin, and the first heat dissipation fin and the third heat dissipation fin, and the second heat dissipation fin and the fourth heat dissipation fin have a clearance space to facilitate the plug connector to be inserted into the mounting groove.

[0010] In a preferred embodiment, the first heat dissipation fin has a top higher than that of the third heat dissipation fin and the fourth heat dissipation fin, and the second heat dissipation fin has a top higher than that of the third heat dissipation fin and the fourth heat dissipation fin; the mounting slot comprises a first mounting slot formed in the first heat dissipation fin and a second mounting slot formed in the second heat dissipation fin, the first mounting slot and the second mounting slot are oppositely arranged, and the upper and lower end portions of the heat dissipation cover are detachably inserted into the first mounting slot and the second mounting slot; the first mounting slot and the second mounting slot extend in the horizontal direction.

[0011] In a preferred embodiment, the heat dissipation device further comprises a fixing assembly for fixing the heat dissipation cover and the heat sink, the fixing assembly comprises a first extension portion arranged on the heat dissipation cover, a first mounting hole arranged on the first extension portion, a second extension portion arranged on the heat dissipation fin, and a second mounting hole arranged on the second extension portion, the first extension portion and the second extension portion extend in the transverse direction, and the first mounting hole and the second mounting hole are connected by a fastener.

[0012] In a preferred embodiment, the second extension portion extends upward from the first heat dissipation fin and the second heat dissipation fin, and the mounting slot extends downward from the first heat dissipation fin and the second heat dissipation fin.

[0013] In a preferred embodiment, the first extension portion is a flat plate.

[0014] The embodiment also adopts the following technical solutions:

[0015] A photovoltaic inverter comprises a box body and the heat dissipation device, and the heat dissipation device is arranged on the back of the box body.

[0016] In a preferred embodiment, the back of the box body is further provided with a third mounting hole for mounting a cable fixing head, and the outer periphery of the third mounting hole is provided with a limiting piece for abutting against a nut. The limiting piece can prevent the cable fixing head from rotating and affecting its waterproof performance when the cable fixing head is fixed.

[0017] In a preferred embodiment, the limiting piece has a plurality of limiting portions, and the included angle between adjacent two limiting portions is greater than 90 degrees and less than 180 degrees.

[0018] The above scheme is adopted in the utility model, and the utility model has the following advantages compared with the prior art:

[0019] The heat dissipation device, when assembling, directly inserts the plug-in part on the heat dissipation cover into the mounting groove of the radiator to realize pre-fixing of the heat dissipation cover on the radiator, and finally the heat dissipation cover and the radiator are fixedly connected by using two screws, so that the installation is relatively convenient, the number of used screws is relatively small, maintenance is relatively convenient, and work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is a schematic diagram of a photovoltaic inverter according to the embodiment of the present application, wherein the heat dissipation cover is mounted on the radiator;

[0022] Figure 2 It is a schematic diagram of a photovoltaic inverter according to the embodiment of the present application, wherein the heat dissipation cover is not mounted on the radiator;

[0023] Figure 3 It is a schematic diagram of a photovoltaic inverter according to the embodiment of the present application, wherein the heat dissipation cover is not mounted on the radiator; Figure 2 It is a partial enlarged view of position A in FIG.

[0024] Figure 4 It is a schematic diagram of a heat dissipation cover according to the embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of a back of a box according to the embodiment of the present application, wherein a cable fixing head is not mounted on the box;

[0026] Figure 6 It is a schematic diagram of a back of a box according to the embodiment of the present application, wherein a cable fixing head is not mounted on the box; Figure 5 It is a partial enlarged view of position B in FIG.

[0027] Figure 7 It is a schematic diagram of a back of a box according to the embodiment of the present application, wherein a cable fixing head is not mounted on the box;

[0028] Figure 8 It is a schematic diagram of a back of a box according to the embodiment of the present application, wherein a cable fixing head is not mounted on the box; Figure 7 It is a partial enlarged view of position C in FIG.

[0029] wherein,

[0030] 100, photovoltaic inverter; 101, box;

[0031] 1, heat dissipation device; 11, radiator; 111, heat dissipation fin; 112, first heat dissipation fin; 113, third heat dissipation fin; 12, fan; 13, heat dissipation cover;

[0032] 2, mounting assembly; 21, plug-in part; 22, mounting groove;

[0033] 3, fixing assembly; 31, first extension; 311, first mounting hole; 32, second extension; 321, second mounting hole;

[0034] 4, cable fixing head; 41, third mounting hole; 42, limiting piece; 43, limiting part; 5, inductance assembly; 6, fastener; 7, avoiding space; 8, hexagonal nut. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application will be described in detail below with reference to the drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0036] Referring to Figures 1 to 8 The present embodiment provides a power electronic device, which is specifically a photovoltaic inverter 100, the photovoltaic inverter 100 comprising a box body 101, a heat dissipation device 1 arranged at the back of the box body 101 and an inductance assembly 5, the heat dissipation device 1 mainly dissipating heat for power components inside the box.

[0037] Further, the heat dissipation device 1 comprises a heat dissipation cover 13, a fan 12 and a heat sink 11, the heat dissipation cover 13 being arranged on the heat sink 11, the fan 12 being fixedly connected with the heat dissipation cover 13 and the air outlet of the fan 12 facing the heat sink 11, specifically, the heat sink 11 has heat dissipation fins, a heat dissipation channel is formed between two adjacent heat dissipation fins, and the air outlet of the fan 12 faces the heat dissipation channel.

[0038] In combination Figure 2 and Figure 3 As shown in the figures, the heat dissipation cover 13 and the heat sink 11 are provided with a mounting assembly 2, the mounting assembly 2 comprising a mounting groove 22 and a plug-in part 21, the plug-in part 21 being inserted into the mounting groove 22 to connect the heat dissipation cover 13 and the heat sink 11, specifically, the heat dissipation cover 13 is provided with the plug-in part 21, the heat sink 11 comprises heat dissipation fins 111, and the mounting groove 22 is arranged on the heat dissipation fins 111, in assembly, the plug-in part 21 is directly inserted into the mounting groove 22 to realize pre-fixing, the mounting is more convenient, and the working efficiency is improved.

[0039] Further, the heat dissipation fins 111 include a first heat dissipation fin 112, a second heat dissipation fin, a third heat dissipation fin 113 and a fourth heat dissipation fin. The first heat dissipation fin 112 is located at the uppermost side of the heat sink 11, and the second heat dissipation fin is located at the lowermost side of the heat sink 11. The mounting slots 22 are arranged on the first heat dissipation fin 112 and the second heat dissipation fin. Here, the upper and lower directions are defined in the wall-hanging state, i.e., the side close to the wiring is the lower side, and the side far from the wiring is the upper side. In other embodiments, the first heat dissipation fin 112 can be arranged at the leftmost side of the heat sink 11, and the second heat dissipation fin can be arranged at the rightmost side of the heat sink 11. The mounting slots 22 are arranged on the first heat dissipation fin 112 at the leftmost side and the second heat dissipation fin at the rightmost side.

[0040] The third heat dissipation fin 113 is arranged adjacent to the first heat dissipation fin 112, and the fourth heat dissipation fin is arranged adjacent to the second heat dissipation fin. The first heat dissipation fin 112 has a top portion higher than the top portions of the third heat dissipation fin 113 and the fourth heat dissipation fin. The second heat dissipation fin has a top portion higher than the top portions of the third heat dissipation fin 113 and the fourth heat dissipation fin. The first heat dissipation fin 112 and the third heat dissipation fin 113, and the second heat dissipation fin and the fourth heat dissipation fin have an avoiding space therebetween, which allows the plug-in part 21 to be more smoothly inserted into the insertion slot 22.

[0041] More specifically, the mounting slots 22 include a first mounting slot arranged on the first heat dissipation fin 112 and a second mounting slot arranged on the second heat dissipation fin. The first mounting slot and the second mounting slot are arranged oppositely. The upper and lower side end portions of the heat dissipation cover 13 are detachably inserted into the first mounting slot and the second mounting slot. The first mounting slot and the second mounting slot extend along the horizontal direction.

[0042] The heat dissipation device 1 further includes a fixing assembly 3 for fixing the heat dissipation cover 13 and the heat sink 11. Specifically, the fixing assembly 3 includes a first extension 31 arranged on the heat dissipation cover 13, a first mounting hole 311 arranged on the first extension 31, a second extension 32 arranged on the heat dissipation fin 111, and a second mounting hole 321 arranged on the second extension 32. The first extension 31 and the second extension 32 extend along the transverse direction. Here, the transverse direction refers to the direction perpendicular to the heat dissipation fin. When the heat dissipation cover 13 is inserted into the heat sink 11, the first mounting hole 311 and the second mounting hole 321 are aligned. At this time, one fastener is used to fixedly connect the heat dissipation cover 13 and the heat sink 11 at the uppermost side and the lowermost side, respectively.

[0043] Further, the first extension 31 extends upward from the heat dissipation cover 13, and the first extension 31 is in the form of a flat plate. The second extension 32 extends upward from the first heat dissipation fin 112 and the second heat dissipation fin. The mounting slots 22 extend downward from the first heat dissipation fin 112 and the second heat dissipation fin. The second extension 32 is located at the middle portion of the first heat dissipation fin 112 and the second heat dissipation fin.

[0044] The back of the box 101 of the photovoltaic inverter is also provided with a cable fixing head 4 and a third mounting hole 41 for mounting the cable fixing head 4. The cable fixing head 4 mainly functions to prevent water and dust, and increase the safety performance of the cable system. In assembly, the safety performance of the cable system can be enhanced. Specifically, one end of the cable is connected to the fan, and the other end is connected to the circuit board inside the box 101 through the cable fixing head 4. The cable fixing head 4 can play a good waterproof and dustproof role. In the prior art, when tightening the nut for fixing the cable fixing head, the cable fixing head 4 is prone to rotation, which is not conducive to assembly and even affects the waterproof performance. To solve this problem, the third mounting hole 41 is provided with a limiting piece 42 for abutting against the nut on the cable fixing head 4. The nut is specifically a hexagonal nut 8. Further, the limiting piece 42 has a plurality of limiting portions 43, and the included angle between adjacent two limiting portions 43 is greater than 90 degrees and less than 180 degrees. Specifically, the limiting portions 43 are arranged at positions away from the heat dissipation fins 111. When the cable fixing head 4 is locked with a nut inside the box, the hexagonal nut 8 outside the box is effectively prevented from rotating, i.e. the cable fixing head 4 is prevented from rotating, which can ensure that the cable fixing head 4 is locked.

[0045] In assembly, the fan 12 is first fixed to the heat dissipation cover 13 with a screw, then the insertion piece 21 on the heat dissipation cover 13 is inserted into the mounting groove 22 on the heat dissipation fin 11, without being completely clamped in, leaving a space for the cable to pass through the cable fixing head 4, then the heat dissipation cover 13 is continuously pushed to clamp the insertion piece 21 into the mounting groove 22, then two screws are used to lock the fan cover 13 and the heat dissipation fin 11, and finally the nut at the cable fixing head 4 for the fan is locked with a tool.

[0046] The photovoltaic inverter of the embodiment has at least the following advantages:

[0047] (1) The fan cover is clamped in the mounting groove 22 of the heat dissipation fin by a clamping groove type design, the number of screws for fixing the fan cover is reduced, assembly is convenient, material and assembly costs are reduced, and production efficiency is improved;

[0048] (2) The fan is convenient for users to disassemble and easy to maintain;

[0049] (3) The problem that the cable fixing head for the fan is prone to rotation during fixing and is not easy to install is solved, and the operation efficiency of the production line is improved.

[0050] As shown in the specification and claims, the terms "comprise" and "include" merely indicate the inclusion of the recited elements, and the method or device can also include other steps or elements. The term "and / or" used herein includes any combination of one or more related items.

[0051] It should be noted that, unless otherwise specified, when a certain feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right and other descriptions used in the utility model are only relative to the mutual position relationship of the components of the utility model in the drawings.

[0052] The above embodiments are only for illustrating the technical concept and characteristics of the utility model, and are a preferred embodiment, the purpose of which is to enable those skilled in the art to understand the content of the utility model and implement it, and it cannot limit the protection scope of the utility model. Any equivalent transformation or modification made according to the principle of the utility model should be covered within the protection scope of the utility model.

Claims

1. A heat dissipating device for a power electronic device, comprising a heat sink, a fan and a heat dissipator, characterized in that, One of the heat sink and the radiator is provided with a mounting groove, and the other is provided with a plug-in part which is inserted into the mounting groove to connect the heat sink and the radiator.

2. The heat dissipating device according to claim 1, wherein The plug-in part is arranged on the heat sink, and the mounting groove is arranged on the radiator.

3. The heat dissipating device of claim 2, wherein, The radiator comprises a plurality of heat dissipation fins, the heat dissipation fins comprise a first heat dissipation fin at the leftmost side and a second heat dissipation fin at the rightmost side, the first heat dissipation fin and the second heat dissipation fin are provided with the mounting groove, or the heat dissipation fins comprise a first heat dissipation fin at the uppermost side and a second heat dissipation fin at the lowermost side, the first heat dissipation fin and the second heat dissipation fin are provided with the mounting groove.

4. The heat dissipating device according to claim 3, wherein The heat dissipation fins further comprise a third heat dissipation fin arranged adjacent to the first heat dissipation fin and a fourth heat dissipation fin arranged adjacent to the second heat dissipation fin, the first heat dissipation fin and the third heat dissipation fin, and the second heat dissipation fin and the fourth heat dissipation fin are provided with a clearance space to facilitate the insertion of the plug-in part into the mounting groove; and / or, the first heat dissipation fin has a top higher than that of the third heat dissipation fin and the fourth heat dissipation fin, and the second heat dissipation fin has a top higher than that of the third heat dissipation fin and the fourth heat dissipation fin; the mounting groove comprises a first mounting groove arranged in the first heat dissipation fin and a second mounting groove arranged in the second heat dissipation fin, the first mounting groove and the second mounting groove are arranged oppositely, and the upper and lower side ends of the heat sink are detachably inserted into the first mounting groove and the second mounting groove; the first mounting groove and the second mounting groove extend along the horizontal direction.

5. The heat dissipating device of claim 4, wherein, The heat dissipation device further comprises a fixing assembly for fixing the heat sink and the radiator, the fixing assembly comprises a first extension arranged on the heat sink, a first mounting hole arranged on the first extension, a second extension arranged on the heat dissipation fin, and a second mounting hole arranged on the second extension, the first extension and the second extension extend transversely, and the first mounting hole and the second mounting hole are connected by a fastener.

6. The heat dissipating device according to claim 5, wherein The second extension extends upward from the first heat dissipation fin and the second heat dissipation fin, and the mounting groove extends downward from the first heat dissipation fin and the second heat dissipation fin; and / or, the first extension is in the form of a flat plate.

7. The heat dissipating device of claim 1, wherein The heat sink comprises a top plate and a side plate, the fan is arranged on the side plate, and the side plate extends downward from the top plate.

8. A photovoltaic inverter comprising a cabinet, characterized in that The photovoltaic inverter further comprises the heat dissipation device according to any one of claims 1 to 7, and the heat dissipation device is arranged on the back of the box body.

9. The photovoltaic inverter of claim 8, wherein, The back of the box body is further provided with a third mounting hole for mounting a cable fixing head, and the outer periphery of the third mounting hole is provided with a limiting part for abutting against a nut of the cable fixing head.

10. The photovoltaic inverter of claim 9, wherein, The limiting part has a plurality of limiting parts, and the included angle between adjacent two limiting parts is greater than 90 degrees and less than 180 degrees. The heat dissipation device is arranged on the back of the box body.

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