CN210327393U

CN210327393U - Micro inverter

Info

Publication number: CN210327393U
Application number: CN201921053674.2U
Authority: CN
Inventors: 莫运坤
Original assignee: Shenzhen Yulong Technology Co Ltd
Current assignee: Shenzhen Yulong Technology Co Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-04-14
Anticipated expiration: 2029-07-05

Abstract

The utility model discloses a micro inverter, which comprises a shell, wherein the bottom of the shell is provided with a first substrate, and the lower surface of the first substrate is connected with a first radiating fin; the first substrate is connected with the shell and the first radiating fin through a first graphene heat-conducting silicone grease layer; the inner wall of the shell is provided with a ventilation pipe, the ventilation pipe is provided with an air inlet and an air outlet, and filter screens are arranged at the air inlet and the air outlet; a temperature sensor and a refrigerating fan are arranged on one side of the inner wall of the shell, which is far away from the air inlet, and a protective cover is sleeved outside the refrigerating fan; the middle part of the shell is provided with an equipment cavity, and a control circuit board and an inverter circuit board are arranged in the equipment cavity; the bottom of the equipment cavity is provided with a second substrate, the bottom of the second substrate is provided with a second radiating fin, and the second substrate is connected with the equipment cavity and the second radiating fin through a second graphene heat-conducting silicone grease layer; the utility model discloses, simple structure, good heat dissipation.

Description

Micro inverter

Technical Field

The utility model relates to a power electronics technical field specifically is a micro inverter.

Background

An inverter is a power conditioning apparatus composed of semiconductor devices, and is mainly used to convert direct current power into alternating current power. The micro inverter needs to be arranged outdoors, the micro inverter has a strong heat dissipation function for ensuring that a circuit board in the micro inverter can work normally, the heat dissipation effect in the micro inverter in the prior art is not strong, and the internal components and the external cables of the inverter are easily ignited and burnt, so that potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a micro inverter to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a micro inverter comprises a shell, wherein a first wiring terminal and a second wiring terminal are arranged on one side surface of the shell, a third wiring terminal is arranged on one side surface of the shell, which is far away from the first wiring terminal, and a fixing plate is arranged at the top of the shell; the bottom of the shell is provided with a first substrate, and the lower surface of the first substrate is connected with a first radiating fin; the first substrate is connected with the shell and the first radiating fin through a first graphene heat-conducting silicone grease layer;

the inner wall of the shell is provided with a ventilation pipe, the ventilation pipe is provided with an air inlet and an air outlet, and filter screens are arranged at the air inlet and the air outlet; a temperature sensor and a refrigerating fan are arranged on one side of the inner wall of the shell, which is far away from the air inlet, and a protective cover is sleeved outside the refrigerating fan;

an equipment cavity is arranged in the middle of the shell, and a control circuit board and an inverter circuit board are arranged in the equipment cavity; the bottom in equipment chamber is equipped with the second base plate, and the bottom of second base plate is equipped with the second fin, and the second base plate all passes through second graphite alkene heat conduction silicone grease layer with equipment chamber and second fin and is connected.

Preferably, the air inlet is arranged at the bottom of the side wall of the ventilation pipe, and the air outlet is arranged at the top of the ventilation pipe and is positioned on one side of a diagonal line of the air inlet.

Preferably, the vent pipe is of an L-shaped structure with a downward opening, and a plurality of small vent holes are formed in the vent pipe.

Preferably, the protective cover is provided with a plurality of through holes.

Preferably, the first substrate is located below the second heat sink.

Preferably, the first substrate and the second substrate are graphite heat-conducting plastic plates.

Preferably, the temperature sensor and the refrigeration fan are electrically connected with the main control circuit board.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a be equipped with the ventilation pipe on the inner wall of casing, be equipped with air intake, air outlet and air-out aperture on the ventilation pipe, the air current in the air gets into the ventilation pipe from the air intake for the inside some heat of casing flows from the air outlet, and the radiating effect is good, and resources are saved, and the dust that sets up in the prevention air current of filter screen gets into inside the casing.

2. The utility model discloses an outside and the equipment chamber outside at the casing are equipped with first fin, second fin, first base plate, second base plate, first graphite alkene heat conduction silicone grease layer and second graphite alkene heat conduction silicone grease layer for the heat of equipment intracavity is leading-in to dispel the heat to the second fin, and partly heat in the casing is leading-in to first fin and is scattered the air through first graphite alkene silicone grease layer, multiple heat dissipation, good heat dissipation.

3. The utility model discloses an inside temperature sensor and the refrigeration fan of being equipped with of casing, when temperature sensor transmission goes out the inside temperature of casing and surpasses often, the refrigeration fan starts under the control of master control circuit board, carries out rapid cooling to the casing inside, prevents inside damage.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the present invention;

fig. 3 is a schematic view of a partial structure of the middle vent pipe of the present invention.

In the figure: 1. a housing; 2. a first connection terminal; 3. a second connection terminal; 4. a third connection terminal; 5. a fixing plate; 6. a first substrate; 7. a first heat sink; 8. a first graphene thermal grease layer; 9. a vent pipe; 10. an air inlet; 11. an air outlet; 12. a filter screen 1; 13. a small vent hole; 14. a temperature sensor; 15. a refrigeration fan; 16. a protective cover; 17. an equipment chamber; 18. a control circuit board; 19. an inverter circuit board; 20. a second substrate; 21. a second heat sink; 22. a second graphene thermal grease layer; 23. And a through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-3, the present invention provides a technical solution: a micro inverter comprises a shell 1, wherein a first wiring terminal 2 and a second wiring terminal 3 are arranged on one side surface of the shell 1, a third wiring terminal 4 is arranged on one side surface of the shell 1, which is far away from the first wiring terminal 2, and a fixing plate 5 is arranged at the top of the shell 1; a first substrate 6 is arranged at the bottom of the shell 1, and a first radiating fin 7 is connected to the lower surface of the first substrate 6; the first substrate 6, the shell 1 and the first radiating fin 7 are connected through a first graphene heat-conducting silicone grease layer 8;

a ventilation pipe 9 is arranged on the inner wall of the shell 1, an air inlet 10 and an air outlet 11 are arranged on the ventilation pipe 9, and filter screens 12 are arranged at the air inlet 10 and the air outlet 11; a temperature sensor 14 and a refrigerating fan 15 are arranged on one side of the inner wall of the shell 1, which is far away from the air inlet 10, and a protective cover 16 is sleeved outside the refrigerating fan 15;

an equipment cavity 17 is formed in the middle of the shell 1, and a control circuit board 18 and an inverter circuit board 19 are arranged in the equipment cavity 17; the bottom of equipment chamber 17 is equipped with second base plate 20, and the bottom of second base plate 20 is equipped with second fin 21, and second base plate 20 all is connected through second graphite alkene heat conduction silicone grease layer 22 with equipment chamber 17 and second fin 21.

Preferably, the air inlet 10 is arranged at the bottom of the side wall of the ventilation pipe 9, and the air outlet 11 is arranged at the top of the ventilation pipe 9 and is positioned at one side of a diagonal line of the air inlet 10.

Preferably, the ventilation pipe 9 is of an L-shaped structure with a downward opening, and a plurality of small ventilation holes 13 are formed in the ventilation pipe 9.

Preferably, the protective cover 16 is provided with a plurality of through holes 23.

Preferably, the first substrate 6 is located below the second heat sink 21.

Preferably, the first substrate 6 and the second substrate 20 are graphite heat-conducting plastic plates.

Preferably, the temperature sensor 14 and the refrigeration fan 15 are both electrically connected to the main control circuit board.

The working principle is as follows: when the miniature inverter is used, the fixing plate 5 is fixed on a support of a photovoltaic panel, the first connecting terminal 2, the second connecting terminal 3 and the third connecting terminal 4 are respectively connected well, after the connection is finished, the miniature inverter starts to operate, heat is generated in the equipment cavity 17 in the operation process, the heat is guided onto the second substrate 20 by the second graphene heat conduction silicone layer 22, the bottom of the second substrate 20 is provided with the second radiating fin 21, the second substrate 20 is connected with the second radiating fin 21 through the second graphene heat conduction silicone layer, the heat on the second substrate 20 is transferred onto the second radiating fin 21, a part of heat on the second radiating fin 21 enters the ventilation pipe 9 through the small air outlet hole 13, airflow in the air enters the ventilation pipe 9 from the air inlet 10, then the heat in the ventilation pipe 9 is taken to the air outlet 11 and enters the air from the air outlet 11, the heat dissipation effect is good, resources are saved, and the arrangement of the filter screen can prevent dust in the airflow from entering the shell; part of heat on the second radiating fins 21 is conducted to the first substrate 6 through the first graphene heat conduction silicone grease layer 8, and the heat on the first substrate 6 is conducted to the first radiating fins 7 and is scattered into the air, so that multiple heat dissipation is realized, the heat dissipation performance is good, and the energy is saved; inside temperature sensor 14 and the refrigeration fan 15 of being equipped with of casing, the protection casing 16 is established to 15 outside covers of refrigeration fan, play the effect of protection to refrigeration fan 15, when the inside temperature of temperature sensor 14 transmission play casing is super often, refrigeration fan 15 starts under the control of master control circuit board, in the through-hole 23 gets into casing 1, carry out rapid cooling to casing 1 inside, prevent that high temperature control circuit board 18 and inverter circuit board 19 from damaging, extension micro-inverter's life.

It is worth noting that: whole device realizes controlling it through total control button, because the equipment that control button matches is equipment commonly used, belongs to current well-done technique, no longer gives unnecessary details its electric connection relation and specific circuit structure again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A micro inverter is characterized by comprising a shell (1), wherein a first wiring terminal (2) and a second wiring terminal (3) are arranged on one side surface of the shell (1), a third wiring terminal (4) is arranged on one side surface, far away from the first wiring terminal (2), of the shell (1), and a fixing plate (5) is arranged at the top of the shell (1); a first substrate (6) is arranged at the bottom of the shell (1), and a first radiating fin (7) is connected to the lower surface of the first substrate (6); the first substrate (6), the shell (1) and the first radiating fin (7) are connected through a first graphene heat-conducting silicone grease layer (8);

the inner wall of the shell (1) is provided with a ventilation pipe (9), the ventilation pipe (9) is provided with an air inlet (10) and an air outlet (11), and filter screens (12) are respectively arranged at the air inlet (10) and the air outlet (11); a temperature sensor (14) and a refrigerating fan (15) are arranged on one side, far away from the air inlet (10), of the inner wall of the shell (1), and a protective cover (16) is sleeved outside the refrigerating fan (15);

an equipment cavity (17) is formed in the middle of the shell (1), and a control circuit board (18) and an inverter circuit board (19) are arranged in the equipment cavity (17); the bottom in equipment chamber (17) is equipped with second base plate (20), and the bottom of second base plate (20) is equipped with second fin (21), and second base plate (20) all are connected through second graphite alkene heat conduction silicone grease layer (22) with equipment chamber (17) and second fin (21).

2. A microinverter according to claim 1, characterized in that: the air inlet (10) is arranged at the bottom of the side wall of the ventilation pipe (9), and the air outlet (11) is arranged at the top of the ventilation pipe (9) and is positioned on one side of the diagonal line of the air inlet (10).

3. A microinverter according to claim 1, characterized in that: the ventilation pipe (9) is of an L-shaped structure with a downward opening, and a plurality of small ventilation holes (13) are formed in the ventilation pipe (9).

4. A microinverter according to claim 1, characterized in that: the protective cover (16) is provided with a plurality of through holes (23).

5. A microinverter according to claim 1, characterized in that: the first substrate (6) is located below the second heat sink (21).

6. A microinverter according to claim 1, characterized in that: the first substrate (6) and the second substrate (20) are graphite heat-conducting plastic plates.

7. A microinverter according to claim 1, characterized in that: the temperature sensor (14) and the refrigeration fan (15) are electrically connected with the main control circuit board.