CN220511378U - Photovoltaic inverter - Google Patents

Abstract

The utility model belongs to the technical field of inverters, and relates to a photovoltaic inverter, which comprises a chassis, wherein a circuit board is arranged in the chassis; the box body is provided with an opening, a transformer is arranged in the box body, and a pin of the transformer penetrates through the opening and is in abutting electrical connection with the circuit board; a waterproof base is arranged along the opening on the side wall of the box body; the elastic waterproof piece is embedded in the waterproof base and partially protrudes out of the waterproof base to be arranged and is abutted with the case. According to the waterproof box, the waterproof base is arranged on the side wall of the box body along the opening, the elastic waterproof piece is embedded in the waterproof base and is arranged on the part protruding out of the waterproof base, the waterproof box is in butt joint with the box, the compression thickness of the elastic waterproof piece is controllable, the waterproof effect is achieved between the box body and the box, meanwhile, the opening is penetrated by the guide leg of the transformer and the circuit board in the box is in butt joint with the circuit board in the box, the transformer is not required to be connected and assembled with the circuit board in the box through a wire, the assembly is convenient, the layout between the transformer and the box is more compact, and the space is saved.

Description

Photovoltaic inverter

Technical Field

The utility model relates to the technical field of inverters, in particular to a photovoltaic inverter.

Background

Because of the power increase of the photovoltaic inverter, the transformer and the inductor which are main heating elements in the photovoltaic inverter are usually sealed in the box body, and heat is dissipated through a heat dissipation structure on the box body.

In order to meet the requirements of different powers, the box body and the case of the photovoltaic inverter are generally independently combined and connected, and an elastic waterproof piece is arranged between the box body and the case for waterproof. However, the box body directly compresses the elastic waterproof piece, the compression height of the elastic waterproof piece is not easy to control, the elastic waterproof piece is easy to be completely compressed, the service life is shortened, or the compression force of the elastic waterproof piece is insufficient, so that the waterproof performance is poor.

In addition, the transformer in the box body is connected with the circuit board in the case through a wire, so that the connection and the assembly are inconvenient.

Disclosure of Invention

The embodiment of the utility model aims to provide a photovoltaic inverter, which solves the technical problems that the compression height of an elastic waterproof piece in the existing photovoltaic inverter is difficult to control, and the connection and assembly between a transformer and a case are inconvenient.

In order to solve the technical problems, the embodiment of the utility model provides a photovoltaic inverter, which adopts the following technical scheme:

the photovoltaic inverter includes: a chassis in which a circuit board is disposed; the box body is provided with an opening, a transformer is arranged in the box body, and pins of the transformer penetrate through the opening and are in abutting electrical connection with the circuit board; a waterproof base is arranged on the side wall of the box body along the opening; the elastic waterproof piece is embedded in the waterproof base, partially protrudes out of the waterproof base and is arranged to be in butt joint with the case.

In a preferred scheme of some embodiments, the circuit board is provided with a conductive slot, and the pin card of the transformer is arranged in the conductive slot and is in abutting electrical connection with the slot wall of the conductive slot.

In a preferred solution of some embodiments, the waterproof base includes a bearing end surface and a limiting protrusion for limiting the compression thickness of the elastic waterproof piece, the bearing end surface extends to the opening of the box body, the limiting protrusion is connected with the bearing end surface and is disposed towards the chassis protrusion, and the elastic waterproof piece is disposed on the bearing end surface and partially protrudes out of the limiting protrusion to be abutted with the chassis.

In a preferred aspect of some embodiments, the waterproof base includes a waterproof groove, and the elastic waterproof member is embedded in the waterproof groove and partially protrudes out of the waterproof groove to be disposed in abutment with the chassis.

In a preferred scheme of some embodiments, a heat-conducting sealant is filled between the transformer and the inner wall of the box body.

In a preferred solution of some embodiments, the photovoltaic inverter further includes a heat dissipation bracket for dissipating heat from the chassis, where the heat dissipation bracket is disposed between the elastic waterproof member and the chassis, and when the elastic waterproof member reaches a maximum compression thickness, the heat dissipation bracket abuts against the waterproof base.

In a preferred solution of some embodiments, the heat dissipation bracket includes an abutment wall and at least one first heat dissipation tooth fin connected with the abutment wall, the abutment wall is disposed between the elastic waterproof element and the chassis, and at least one first heat dissipation tooth fin is disposed on the abutment wall at intervals.

In a preferred scheme of some embodiments, at least one second heat dissipation tooth piece is arranged on the outer surface of the box body, and at least one second heat dissipation tooth piece is arranged at intervals.

In a preferred aspect of some embodiments, the photovoltaic inverter further comprises an inductor connected to the transformer, the inductor being disposed within the case.

In a preferred scheme of some embodiments, a plurality of first through holes are formed in the waterproof base, second through holes corresponding to the first through holes are formed in the elastic waterproof piece, and the photovoltaic inverter further comprises fasteners matched with the first through holes and the second through holes, and the fasteners penetrate through the first through holes and the second through holes.

Compared with the prior art, the photovoltaic inverter provided by the embodiment of the utility model has the following main beneficial effects:

according to the photovoltaic inverter, the waterproof base is arranged on the side wall of the box body along the opening, the elastic waterproof piece is embedded in the waterproof base and is arranged to be partially protruded out of the waterproof base to be in butt joint with the machine case, the compression thickness of the elastic waterproof piece is controllable, so that a waterproof effect is achieved between the box body and the machine case, meanwhile, the opening is penetrated by the leading foot of the transformer to be connected with the circuit board in the machine case in a butt joint manner, the transformer is not required to be connected with the circuit board in the machine case through a lead, the assembly is convenient, the layout between the transformer and the machine case is more compact, and the space is saved.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic perspective view of a photovoltaic inverter according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional structural view of the photovoltaic inverter of FIG. 1;

FIG. 3 is a schematic diagram of a transformer in a case and a circuit board in a chassis in an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of a transformer disposed in a case according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the three-dimensional exploded structure of FIG. 4;

fig. 6 is a schematic plan view of a transformer disposed in a case according to an embodiment of the present utility model.

The reference numerals in the drawings are as follows:

10. a chassis; 20. a case body; 21. an opening; 22. a waterproof base; 221. a bearing end surface; 222. a limit protrusion; 223. a first through hole; 23. the second radiating tooth piece; 30. an elastic waterproof member; 31. a second through hole; 40. a circuit board; 50. a transformer; 51. pins; 60. a heat dissipation bracket; 61. abutting the wall; 62. a first heat dissipation tooth sheet; 70. an inductance.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terms used in the specification are used herein for the purpose of describing particular embodiments only and are not intended to limit the present utility model, for example, the orientations or positions indicated by the terms "length", "width", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are orientations or positions based on the drawings, which are merely for convenience of description and are not to be construed as limiting the present utility model.

The terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion; the terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.

In the description of the utility model and the claims and the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, references herein to "an embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

An embodiment of the present utility model provides a photovoltaic inverter, as shown in fig. 1 and 4, which includes a case 10, a case 20, and an elastic waterproof member 30.

A circuit board 40 is disposed within the chassis 10. The circuit board 40 is provided with components and connection lines to realize the functions of current conversion, voltage regulation, power control, protection and the like of the photovoltaic inverter.

The box 20 is provided with an opening 21. A transformer 50 is arranged in the box body 20, and pins 51 of the transformer 50 penetrate through the opening 21 and are in abutting electrical connection with the circuit board 40; a waterproof base 22 is provided along the opening 21 on the side wall of the case 20. The pins 51 of the transformer 50 are electrically connected against the circuit board 40 such that the transformer 50 is connected into a connection line on the circuit board 40 to effect a voltage conversion. The case 20 may be formed by plastic working of metal, such as aluminum alloy, so as to effectively dissipate heat from the transformer 50.

The elastic waterproof member 30 is embedded in the waterproof base 22, and partially protrudes out of the waterproof base 22 to be disposed in abutment with the chassis 10. The elastic waterproof member 30 may be made of rubber, polyurethane, or other material with good elasticity, and can be compressed to provide good waterproof effect between the casing 10 and the case 20.

According to the photovoltaic inverter provided by the embodiment of the utility model, the waterproof base 22 is arranged on the side wall of the box body 20 along the opening 21, the elastic waterproof piece 30 is embedded in the waterproof base 22 and partially protrudes out of the waterproof base 22 to be in butt joint with the case 10, the compression thickness of the elastic waterproof piece 30 is controllable, so that a waterproof effect is achieved between the box body 20 and the case 10, meanwhile, the pins 51 of the transformer 50 penetrate through the opening 21 to be in butt electrical connection with the circuit board 40 in the case 10, the transformer 50 is not required to be connected and assembled with the circuit board 40 in the case 10 through wires, the assembly is convenient, the layout between the transformer 50 and the case 10 is more compact, and the space is saved. The transformer 50 is in good contact with the circuit board 40, and the diversion connection is balanced.

In this embodiment, a conductive slot (not shown) is disposed on the circuit board 40, and the pins 51 of the transformer 50 are clamped in the conductive slot and are abutted against the slot wall of the conductive slot for electrical connection. The pins 51 of the transformer 50 are clamped in the conductive grooves, and can be abutted against the side walls or the bottom walls of the conductive grooves to realize electric connection between the two.

The conductive groove may be a through groove on the circuit board 40, or a blind groove, and a conductive copper foil is laid on the wall of the through groove or the blind groove to be electrically connected with the pin 51 of the transformer 50.

Of course, the circuit board 40 may not be provided with a conductive groove, and the pins 51 of the transformer 50 are directly and electrically connected with the connection circuit on the circuit board 40, i.e. the copper foil is laid to abut against.

In this embodiment, the conductive slot is preferably disposed on the circuit board 40, and the pin 51 of the transformer 50 is clamped to the conductive slot to realize electrical connection, so that the electrical connection between the transformer 50 and the circuit board 40 is more stable, and the pin 51 of the transformer 50 is more convenient to align with the conductive position on the circuit board 40, so that the assembly is more convenient.

Referring to fig. 3 to 6, in the present embodiment, the waterproof base 22 includes a bearing end surface 221 and a limiting protrusion 222 for limiting the compression thickness of the elastic waterproof member 30, the bearing end surface 221 extends to the opening 21 of the box body 20, the limiting protrusion 222 is connected with the bearing end surface 221 and protrudes toward the chassis 10, and the elastic waterproof member 30 is disposed on the bearing end surface 221 and partially protrudes out of the limiting protrusion 222 to be abutted with the chassis 10.

The bearing end surface 221 of the waterproof base 22 and the limiting boss 222 form a step structure, bear and place the elastic waterproof piece 30, perform preliminary positioning on the elastic waterproof piece 30, and the elastic waterproof piece 30 is embedded in the step structure and is located between the box body 20 and the case 10. The limiting protrusion 222 limits the compression thickness of the elastic waterproof member 30 so that the elastic waterproof member 30 is not excessively compressed, and the service life thereof is prolonged. The compressed thickness of the elastic waterproof member 30 can be adjusted by controlling the height of the limiting protrusion 222, so that the distance between the circuit board 40 and the bearing end surface 221 (as shown in fig. 3 a) can be controlled, and the circuit board 40 is in good contact with the pins 51 of the transformer 50.

In another embodiment, the waterproof base 22 includes a waterproof groove, and the elastic waterproof member 30 is embedded in the waterproof groove and partially protrudes out of the waterproof groove to be disposed to abut against the chassis 10. The waterproof groove can also provide a placement location for the elastic waterproof member 30, and can initially position the elastic waterproof member 30, and the top of the groove sidewall of the waterproof groove can limit the compression thickness of the elastic waterproof member 30.

In this embodiment, compared with the waterproof groove mode in which the bearing end surface 221 and the limiting protrusion 222 form a step structure, the requirement on the width precision of the elastic waterproof piece 30 is lower, and the waterproof groove mode requires the width of the elastic waterproof piece 30 to be matched with the width of the groove bottom wall of the waterproof groove, so as to avoid deformation.

Wherein, referring to fig. 5, the waterproof base 22 is provided with a plurality of first through holes 223, and the elastic waterproof member 30 is provided with second through holes 31 corresponding to the first through holes 223. The photovoltaic inverter further includes a fastener (not shown) fitted with the first through hole 223 and the second through hole 31, the fastener being provided through the first through hole 223 and the second through hole 31.

The fastener can lock the elastic waterproof piece 30 on the waterproof base 22, so as to fix the waterproof base 22. And when the elastic waterproof piece 30 needs to be replaced, the fastener can be separated from the first through hole 223 and the second through hole 31, and the elastic piece is detached and replaced conveniently.

The fastener specifically can adopt the screw, and the screw sets up the external screw thread, and first through-hole 223 sets up the internal screw thread, and first through-hole 223 and second through-hole 31 are worn to establish to the screw, with the internal screw thread cooperation, lock on waterproof base 22 with elasticity water proof 30.

In this embodiment, a heat-conducting sealant is filled between the transformer 50 and the inner wall of the case 20. The heat-conducting sealant has good heat-conducting property, and can conduct heat generated by the transformer 50 to the box body 20 for heat dissipation, so that the transformer 50 can work normally. And the heat-conducting sealant can fix the transformer 50 in the box body 20, prevent the transformer 50 from shifting with the box body 20, and also can provide physical protection to prevent dust, moisture and other external substances from entering the transformer 50 and the box body 20, thereby protecting the internal elements of the box body 20 from damage.

In this embodiment, referring to fig. 2 and 3, the photovoltaic inverter further includes a heat dissipation bracket 60 for dissipating heat from the chassis 10, the heat dissipation bracket 60 is disposed between the elastic waterproof member 30 and the chassis 10, and when the elastic waterproof member 30 reaches the maximum compression thickness, the heat dissipation bracket 60 abuts against the waterproof base 22.

The heat dissipation bracket 60 can dissipate heat generated by the cabinet 10. When the elastic waterproof piece 30 reaches the maximum compression thickness, the heat dissipation bracket 60 is abutted with the waterproof base 22, and the heat dissipation bracket 60 can also dissipate the heat of the box body 20.

Further, the heat dissipation bracket 60 includes an abutment wall 61 and at least one first heat dissipation tooth 62 connected to the abutment wall 61, the abutment wall 61 is disposed between the elastic waterproof member 30 and the chassis 10, and the at least one first heat dissipation tooth 62 is disposed on the abutment wall 61 at intervals.

The number of the first heat radiating fins 62 may be one, two or more. When two or more first heat dissipation fins 62 are provided on the abutment wall 61, the first heat dissipation fins 62 are provided on the abutment wall 61 at intervals. The first heat dissipation fins 62 can increase the contact area between the chassis 10 and the air, and improve the heat dissipation effect.

Referring to fig. 2 and 3, in the present embodiment, at least one second heat dissipation tooth piece 23 is disposed on the outer surface of the box body 20, and at least one second heat dissipation tooth piece 23 is disposed at intervals.

The number of the second heat radiating fins 23 may be one, two or more. When two or more second heat dissipation fins 23 are disposed on the outer surface of the box 20, the second heat dissipation fins 23 are disposed on the outer surface of the box 20 at intervals. The second heat dissipation tooth piece 23 can increase the contact area between the box body 20 and the air, and improve the heat dissipation effect.

In this embodiment, referring to fig. 4 and 5, the photovoltaic inverter further includes an inductor 70 connected to the transformer 50, and the inductor 70 is disposed in the box 20. By placing the two main heating elements, the transformer 50 and the inductor 70, in the case 20, the case 20 radiates heat generated by the two heating elements. And, the engineer can independently combine the box body 20 with the transformer 50 and the inductor 70 and different machine boxes 10 to adapt to different power requirements.

The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the scope of the claims of the present utility model.

Claims (10)

1. A photovoltaic inverter, comprising:

a chassis in which a circuit board is disposed;

the box body is provided with an opening, a transformer is arranged in the box body, and pins of the transformer penetrate through the opening and are in abutting electrical connection with the circuit board; a waterproof base is arranged on the side wall of the box body along the opening;

the elastic waterproof piece is embedded in the waterproof base, partially protrudes out of the waterproof base and is arranged to be in butt joint with the case.

2. The photovoltaic inverter of claim 1, wherein the circuit board is provided with a conductive slot, and the pins of the transformer are clamped in the conductive slot and are in abutting electrical connection with the slot walls of the conductive slot.

3. The photovoltaic inverter of claim 1, wherein the waterproof base comprises a bearing end surface and a limiting protrusion for limiting the compression thickness of the elastic waterproof piece, the bearing end surface extends to the opening of the box body, the limiting protrusion is connected with the bearing end surface and is arranged towards the chassis protrusion, and the elastic waterproof piece is arranged on the bearing end surface and partially protrudes out of the limiting protrusion to be abutted with the chassis.

4. The photovoltaic inverter of claim 1, wherein the waterproof base comprises a waterproof groove, and the elastic waterproof member is embedded in the waterproof groove and partially protrudes out of the waterproof groove to be in abutting connection with the chassis.

5. The photovoltaic inverter of any of claims 1-4 wherein a thermally conductive sealant is poured between the transformer and the inner wall of the box.

6. The photovoltaic inverter of any of claims 1-4 further comprising a heat dissipating bracket for dissipating heat from the chassis, the heat dissipating bracket disposed between the elastomeric flashing and the chassis, the heat dissipating bracket abutting the flashing base when the elastomeric flashing reaches a maximum compressed thickness.

7. The photovoltaic inverter of claim 6, wherein the heat dissipation bracket comprises an abutment wall and at least one first heat dissipation fin connected to the abutment wall, the abutment wall is disposed between the elastic waterproof member and the chassis, and the at least one first heat dissipation fin is disposed on the abutment wall at intervals.

8. The photovoltaic inverter of any of claims 1 to 4, wherein at least one second heat dissipation tooth is disposed on an outer surface of the case, and at least one second heat dissipation tooth is disposed at intervals.

9. The photovoltaic inverter of any of claims 1-4 further comprising an inductance connected to the transformer, the inductance disposed within the box.

10. The photovoltaic inverter of any of claims 1-4 wherein the waterproof base is provided with a plurality of first through holes and the elastic waterproof member is provided with second through holes corresponding to the first through holes, the photovoltaic inverter further comprising fasteners mated with the first and second through holes, the fasteners being disposed through the first and second through holes.