CN209072351U - Photovoltaic DC-to-AC converter shell - Google Patents

Abstract

The utility model provides a kind of photovoltaic DC-to-AC converter shell, it include: outer housing, with open end, at least one sunk type inductance chamber is formed in the outer housing, the outside projection of bottom wall of at least one sunk type inductance chamber from the outer housing forms at least one inductance cavity, the bottom wall of the outer housing is equipped with power amplifier board radiator, and the power amplifier board radiator is located at the side of at least one inductance cavity；Sealing cover is sealedly connected on the open end of the outer housing.The photovoltaic DC-to-AC converter shell of the utility model can optimize the layout of inductance, and be conducive to inductance and radiate, and efficiently use complete machine space, promote the miniaturization of product and have higher protection reliability.

Description

PV inverter housing

technical field

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

Background technique

As a clean energy and renewable energy, photovoltaic power generation technology has been widely used around the world. Among them, the photovoltaic inverter is responsible for inverting the DC power converted by the photovoltaic panels into AC power, and is a key component in the photovoltaic power generation system.

As an important functional device in the inverter circuit, the inductor has always taken up a large space, has a high heat dissipation, and has electromagnetic interference to the surrounding devices. Due to the limitation of the function of the inductor itself, its volume is difficult to reduce. Therefore, how to improve heat dissipation efficiency, reduce electromagnetic interference, and further promote the miniaturization of products has become an urgent problem to be solved.

The conventional installation method of the existing inverter inductor is to install inside the housing, occupying the internal space of the inverter, and the heat dissipation effect of the inductor is poor, and the heat of the inductor will affect other internal devices. In addition, some existing inverter products place the inductor in the inductor box, and then install the inductor box outside the inverter housing. The assembly is complicated, and the inductor box and the housing need to be waterproofed, which has the risk of failure.

Utility model content

The purpose of the utility model is to provide a photovoltaic inverter casing, which can optimize the layout of the inductor, facilitate the heat dissipation of the inductor, effectively utilize the space of the whole machine, promote the miniaturization of the product, and have higher protection reliability.

Above-mentioned purpose of the present utility model can adopt following technical scheme to realize:

The utility model provides a photovoltaic inverter housing, comprising:

The outer casing has an open end, at least one sunken inductance cavity is formed in the outer casing, and at least one of the sunken inductance cavity is protruded outward from the bottom wall of the outer casing to form at least one inductance cavity, so The outer side of the bottom wall of the outer casing is provided with a power board radiator, and the power board radiator is located on one side of the at least one inductor cavity;

A sealing cover is sealingly connected to the open end of the outer casing.

In an embodiment of the present invention, the at least one inductor cavity is arranged side by side on one side of the outer casing, and the power board heat sink is located at the other side of the outer casing.

In the embodiment of the present invention, a plurality of inductance heat dissipation fins are provided on the outer side of the bottom wall of the inductor cavity, and the power board heat sink is composed of a plurality of power board heat dissipation fins.

In the embodiment of the present invention, an inductor bracket capable of holding the inductor is arranged in the sunken inductor cavity.

In an embodiment of the present invention, the inductor bracket has a peripheral side wall frame and a bottom frame connected to the lower part of the peripheral side wall frame, and a plurality of hollows are provided on the peripheral side wall frame and the bottom frame. hole.

In the embodiment of the present invention, the horizontal height of the bottom frame is higher than the horizontal height of the bottom end of the peripheral side wall frame. There is a gap between the bottom frame of the inductor support and the bottom wall of the sunken inductor cavity.

In the embodiment of the present invention, when the inductor bracket containing the inductor is placed in the sunken inductor cavity, the inductor and the sunken inductor cavity are formed between the inductor and the sunken inductor cavity. There are voids, and the inductance potting compound can be filled in the voids.

In an embodiment of the present invention, the at least one inductor cavity and the power board heat sink are integrally formed with the outer casing.

In an embodiment of the present invention, a sealing strip is provided between the sealing cover and the open end of the outer casing.

The features and advantages of the photovoltaic inverter housing of the utility model are as follows: the utility model effectively solves the problem that the inductance in the photovoltaic inverter occupies the internal space of the equipment and the heat dissipation effect is poor. It has the advantages of compact structure, simple assembly, good heat dissipation effect, high reliability and beautiful appearance.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a photovoltaic inverter casing of the present invention.

2 is a bottom perspective view of the outer casing of the photovoltaic inverter casing of the present invention.

FIG. 3 is a schematic structural diagram of the inductance support of the photovoltaic inverter housing of the present invention.

4 is a schematic cross-sectional structural diagram of a photovoltaic inverter casing of the present invention.

FIG. 5 is a schematic structural diagram of an inductor installed in the outer shell of the photovoltaic inverter casing of the present invention.

Description of the drawings: 1. Outer casing; 11. Open end; 111. Sealing strip; 12. Inductance cavity; 121. Sunken inductor cavity; 122. Inductance cooling fin; radiator; 141, heat dissipation fins of power board; 15, peripheral side wall; 16, accommodating cavity; 2, sealing cover; 3, inductor; 31, inductor lead wire; 4, inductor bracket; 41, peripheral side wall frame; 411, Hollow hole; 42, chassis; 421, hollow hole; 5, gap; 6, inductance potting glue.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or intervening elements may be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may be present.

As shown in FIG. 1 , the present invention provides a photovoltaic inverter casing, comprising an outer casing 1 and a sealing cover 2 , wherein: the outer casing 1 has an open end 11 , and at least one lower part is formed in the outer casing 1 . A sink-type inductor cavity 121, at least one of the sink-type inductor cavities 121 protrudes outward from the bottom wall 13 of the outer casing 1 to form at least one inductor cavity 12, and the outer side of the bottom wall 13 of the outer casing 1 is provided with The power board heat sink 14 is located on one side of the at least one inductor cavity 12 ; the sealing cover 2 is sealed and connected to the open end 11 of the outer casing 1 .

Specifically, the outer casing 1 is made of an aluminum alloy material, which is generally in the shape of a rectangular parallelepiped. The upper end of the outer casing 1 is formed with an open end, and the lower end is formed with a bottom wall 13. The outer periphery of the bottom wall 13 is provided with a rectangular peripheral edge. The side wall 15 , the peripheral side wall 15 and the bottom wall 13 are surrounded by a receiving cavity 16 . The sealing cover 2 is generally in the shape of a cuboid, and is sealedly connected to the open end 11 of the outer casing 1. In this embodiment, a sealing strip 111 is provided between the sealing cover 2 and the open end 11 of the outer casing 1. The sealing strip 111 is generally rectangular in shape, the sealing cover 2 and the outer casing 1 can be fixed by screws or other connection methods, and the sealing strip 111 is compressed between the sealing cover 2 and the open end 11 of the outer casing 1 to seal the accommodating cavity 16. The purpose is to achieve dustproof and waterproof effect.

In this embodiment, in the accommodating cavity 16 of the outer casing 1, at least one sunken inductance cavity 121 is formed from the inner side of the bottom wall 13 to the outer side of the bottom wall 13, and each sunken inductance cavity 121 is connected with The accommodating cavity 16 is connected to each other, and the sunken inductor cavity 121 protrudes from the outer side of the bottom wall 13 to form the inductor cavity 12 , as shown in FIG. At least one inductor cavity 12 is protruded above the 13 . In the present invention, the inductance cavity 12 is designed to protrude outside the outer casing 1, which is beneficial to reduce the electromagnetic interference of the inductance 3 to the internal devices. Since there is no need to install the inductance box separately, the assembly steps are simpler, and it has a higher efficiency. Protection reliability.

In the present invention, at least one inductor cavity 12 is arranged side by side on one side of the outer casing 1 . The inductor cavities 121 are arranged side by side to form a row and are arranged on one side of the outer casing 1 , which is convenient for the centralized arrangement and heat dissipation of the inductors 3 . Of course, in other embodiments, two, three, five or more submerged inductor cavities 121 may also be provided in the outer casing 1 . The inductor cavities 121 are arranged in multiple rows and are arranged on one side of the outer casing 1 , which is not limited here.

Further, a plurality of inductance heat dissipation fins 122 are provided on the outer sides of the bottom walls of the plurality of inductance cavities 12 formed by the sunken inductance cavities 121 to help the inductors 3 placed in the sunken inductance cavities 121 to dissipate heat.

The power board heat sink 14 is arranged outside the bottom wall 13 of the outer casing 1 and is located on one side of at least one inductor cavity 12 . In this embodiment, the power board heat sink 14 is composed of a plurality of power board heat sink fins 141 , which dissipates heat through the heat dissipation fins 141 of the power board, thereby improving the heat dissipation effect. The power board radiator 14 and the at least one inductor cavity 12 are respectively disposed on two sides of the outer casing 1, and the two are arranged separately and do not affect the heat dissipation of each other.

In an embodiment of the present invention, the outer casing 1 , the inductor cavity 12 and the power board heat sink 14 can be integrally formed, for example, by a die-casting process.

According to an embodiment of the present invention, an inductor bracket 4 capable of holding the inductor 3 is arranged in the sunken inductor cavity 121 , and the inductor bracket 4 can prevent the inductor 3 from directly contacting the outer casing 1 .

Specifically, the inductor bracket 4 is designed according to the shape of the inductor 3, and in this embodiment, it is a net-shaped cylindrical shape, which is made of insulating material and meets the requirements of heat resistance. As shown in FIG. 3 , the inductor bracket 4 has a peripheral side wall frame 41 and a bottom frame 42 connected to the lower part of the peripheral side wall frame 41 . The peripheral side wall frame 41 and the bottom frame 42 are both provided with a plurality of hollow holes 411 and A plurality of hollow holes 421 .

Further, as shown in FIG. 4 , the horizontal height of the bottom frame 42 is higher than the horizontal height of the bottom end of the peripheral side wall frame 41 . When the inductor bracket 4 is placed in the sunken inductor cavity 121 , the inductor bracket 4 There is a gap 5 between the bottom frame 42 and the bottom wall of the sunken inductor cavity 121 , that is, the bottom frame 42 of the inductor bracket 4 is in an overhead state.

When the inductor bracket 4 containing the inductor 3 is placed in the sinking inductor cavity 121 , a gap is formed between the inductor 3 and the sinking inductor cavity 121 , and the inductor potting glue can be filled in the gap. The inductance potting compound adopts thermal conductive silica gel that meets the requirements of insulation and heat resistance, has good fluidity before curing, and can pass through the plurality of hollow holes 411 and the plurality of hollow holes 421 on the inductance bracket 4, and sink the whole The gaps inside the inductance cavity 121 are all filled, and there is a gap 5 between the bottom frame 42 of the inductance bracket 4 and the bottom wall of the sunken inductance cavity 121, so as to ensure that the gap 5 at the bottom is completely filled by the inductance potting glue , to avoid insufficient filling of the inductive potting compound at the bottom.

In the present invention, as shown in FIG. 5 , the inductor 3 has an inductor lead 31 , and the inductor lead 31 protrudes from the sunken inductor cavity 121 and is connected with related devices.

The utility model effectively solves the problems that the inductance in the photovoltaic inverter occupies the internal space of the equipment and the heat dissipation effect is poor. The photovoltaic inverter casing of the utility model has the advantages of compact structure, simple assembly, good heat dissipation effect, high reliability and appearance. Aesthetic advantages.

The above descriptions are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the protection scope of the present invention.

Claims (9)

1. A photovoltaic inverter housing, characterized in that, comprising: The outer casing has an open end, at least one sunken inductance cavity is formed in the outer casing, and at least one of the sunken inductance cavity is protruded outward from the bottom wall of the outer casing to form at least one inductance cavity, so The outer side of the bottom wall of the outer casing is provided with a power board radiator, and the power board radiator is located on one side of the at least one inductor cavity; A sealing cover is sealingly connected to the open end of the outer casing. 2 . The photovoltaic inverter casing according to claim 1 , wherein the at least one inductor cavity is arranged side by side on one side of the outer casing, and the power board heat sink is located on the side of the outer casing. 3 . The other side. 3 . The photovoltaic inverter housing according to claim 1 or 2 , wherein a plurality of inductance heat dissipation fins are arranged on the outer side of the bottom wall of the inductance cavity, and the power board heat sink consists of a plurality of power dissipation fins. 4 . Plate cooling fins. 4 . The photovoltaic inverter housing according to claim 1 , wherein an inductance bracket capable of holding the inductance is arranged in the sunken inductance cavity. 5 . 5 . The photovoltaic inverter housing according to claim 4 , wherein the inductor bracket has a peripheral side wall frame and a bottom frame connected to the lower part of the peripheral side wall frame, and the peripheral side wall frame and The bottom frame is provided with a plurality of hollow holes. 6 . The photovoltaic inverter housing according to claim 5 , wherein the horizontal height of the bottom frame is higher than the horizontal height of the bottom end of the peripheral side wall frame, and the inductance bracket is placed in the In the state in the sunken inductor cavity, there is a gap between the bottom frame of the inductor support and the bottom wall of the sunken inductor cavity. 7 . The photovoltaic inverter casing according to claim 5 or 6 , wherein in a state that the inductor bracket containing the inductor is placed in the sunken inductor cavity, the A gap is formed between the inductor and the sunken inductor cavity, and the inductor potting glue can be filled in the gap. 8 . The photovoltaic inverter housing of claim 1 , wherein the at least one inductor cavity and the power board heat sink are integrally formed with the outer housing. 9 . 9 . The photovoltaic inverter casing according to claim 1 , wherein a sealing strip is provided between the sealing cover and the open end of the outer casing. 10 .