CN206923223U - A kind of photovoltaic DC-to-AC converter with radiator structure - Google Patents

Abstract

The utility model discloses a photovoltaic inverter with a heat dissipation structure, which comprises a top cover, an inner box body, a filter, an inverter bridge, a single-phase transformer, a relay, a touch screen, an aluminum plate, a casing, a terminal, a protrusion, a miniature Blower, thermal paste, peltier, mounting plate, cooling fins, silicone thermal pad, negative pressure fan and ventilation holes. The utility model adopts a double-layer structure, which can not only ensure the sealing performance of the internal components without leakage, but also facilitate the heat dissipation of the internal components. Aluminum plates are installed around the inner box to export the heat of the internal components. Micro-blowers and negative-pressure fans export the internal heat on both sides by blowing and drawing air, and cooperate with ventilation holes and protrusions to increase the heat dissipation area to achieve good heat dissipation performance; the thermal paste sheet at the bottom realizes heat conduction and The connection of the semiconductor cooling chip realizes the export of internal heat from the bottom through the semiconductor cooling chip.

Description

A photovoltaic inverter with heat dissipation structure

technical field

The utility model relates to a photovoltaic inverter, in particular to a photovoltaic inverter with a heat dissipation structure, and belongs to the technical field of electric power equipment application.

Background technique

Inverter, also known as power regulator, is an inverter switch circuit, referred to as an inverter circuit for short. This circuit completes the inverter function by turning on and off the electronic switch. The key components play an important role in the photovoltaic system, so they have high research value.

The existing inverter adopts a closed box-type or box-type structure. The inverter with this structure has good sealing performance, but the heat dissipation performance is weak. If the excessive heat cannot be dissipated, the internal components will be burned out, resulting in The service life of the inverter is short and the economic damage is great. Therefore, aiming at the above problems, a photovoltaic inverter with heat dissipation structure is proposed.

Utility model content

The purpose of this utility model is to provide a photovoltaic inverter with heat dissipation structure in order to solve the above problems.

The utility model achieves the above object through the following technical solutions. A photovoltaic inverter with a heat dissipation structure includes a top cover, an inner box and a casing. The surface of the top cover is provided with a touch screen, and the bottom end of the top cover is provided with a casing. ; The surface of the shell is provided with terminal posts, and the inside of the shell is provided with an inner box; an aluminum plate is arranged between the inner box and the top cover, and the two sides of the inner box are respectively connected to a micro blower and a negative pressure fan through aluminum plates; One side of the micro blower and the negative pressure fan is provided with a ventilation hole, and one side of the ventilation hole is provided with a protrusion; the bottom side of the protrusion is provided with a mounting plate, and the inside of the inner box is sequentially provided with a filter , an inverter bridge, a single-phase transformer and a relay, and the bottom of the inner box is provided with a thermally conductive paste; the bottom of the thermally conductive paste is provided with a silicone thermally conductive sheet, and the bottom of the silicone thermally conductive sheet is connected to a semiconductor refrigeration sheet through a thermally conductive paste, and The bottom of the semiconductor cooling sheet is provided with cooling fins.

Preferably, there are several protrusions, and the protrusions are distributed on both sides of the housing at equal intervals.

Preferably, ventilation holes are provided between the protrusions, and the ventilation holes are trumpet-shaped.

Preferably, the heat dissipation fins adopt a structure of uneven length, and the heat dissipation fins of uneven length cross and are distributed equidistantly on the bottom of the semiconductor cooling fin.

Preferably, the filter, the inverter bridge, the single-phase transformer, the relay, the touch screen and the inside of the terminal are electrically connected.

Preferably, the top cover is engaged with the shell, and the top cover is welded with protrusions on both sides of the bottom; the bottom of the protrusion is welded with a mounting plate.

The beneficial effects of the utility model are: the photovoltaic inverter with a heat dissipation structure adopts a double-layer structure, which can not only ensure the sealing performance of the internal components, no leakage phenomenon, but also facilitate the heat dissipation of the internal components. Aluminum plates are installed around the body to export the heat of the internal components, and the side is equipped with micro-blowers and negative pressure fans, and the internal heat is exported by means of blowing and exhausting on both sides, and the cooling area is enlarged with ventilation holes and protrusions , to achieve good heat dissipation performance; the heat conduction paste at the bottom realizes heat conduction and connection with the semiconductor cooling sheet, and the internal heat is exported from the bottom through the semiconductor cooling sheet, and the internal heat dissipation is realized to the greatest extent with the help of cooling fins, extending the inverter. Long service life, good economic and social benefits, suitable for promotion and use.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model;

Fig. 2 is a schematic diagram of the connection structure between the inner box body and the protrusion of the utility model;

Fig. 3 is a schematic diagram of the principle structure of the utility model.

In the figure: 1. Top cover, 2. Inner box, 21. Filter, 22. Inverter bridge, 23. Single-phase transformer, 24. Relay, 3. Touch screen, 4. Aluminum plate, 5. Shell, 6. Wiring Column, 7. Protrusion, 8. Micro blower, 9. Thermal paste sheet, 10. Semiconductor cooling chip, 11. Mounting plate, 12. Radiating fins, 13. Silicone heat conducting sheet, 14. Negative pressure fan, 15. Ventilation hole.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1-3, a photovoltaic inverter with heat dissipation structure, including a top cover 1, an inner box 2 and an outer shell 5, the surface of the top cover 1 is provided with a touch screen 3, and the bottom of the top cover 1 There is a casing 5 at the end; the surface of the casing 5 is provided with terminal posts 6, and the interior of the casing 5 is provided with an inner box 2, so that the photovoltaic inverter has a two-layer structure, which does not change the overall sealing performance and increases heat dissipation at the same time. Effect: an aluminum plate 4 is arranged between the inner box body 2 and the top cover 1. The aluminum plate 4 has good thermal conductivity and is convenient for heat export. The two sides of the inner box body 2 are respectively connected to the micro blower 8 and the Negative pressure blower 14, heat radiation and extraction are carried out by micro blower 8 and negative pressure blower 14 respectively, strengthen heat dissipation performance; One side of described micro blower 8 and negative pressure blower 14 is provided with ventilation hole 15, and described ventilation hole 15 One side of the bulge 7 is provided to increase the heat dissipation area; the bottom side of the bulge 7 is provided with a mounting plate 11, and the inside of the inner box 2 is sequentially provided with a filter 21, an inverter bridge 22, and a single-phase transformer. 23 and a relay 24, the bottom of the inner box 2 is provided with a thermally conductive paste 9; the bottom of the thermally conductive paste 9 is provided with a silica gel thermally conductive sheet 13, and the bottom of the silica gel thermally conductive sheet 13 is connected to a semiconductor refrigeration sheet through the thermally conductive paste 9 10. The bottom of the semiconductor cooling sheet 10 is provided with heat dissipation fins 12 to realize the cooling of the photovoltaic inverter from the bottom and realize heat dissipation.

As a technical optimization scheme of the present invention, there are several protrusions 7, and the protrusions 7 are distributed on both sides of the housing 5 with equal spacing, so as to increase the heat dissipation area from the side and enhance the heat dissipation effect.

As a technical optimization scheme of the present invention, ventilation holes 15 are provided between the protrusions 7, and the ventilation holes 15 are trumpet-shaped to enhance the ventilation effect and realize the heat dissipation function.

As a technical optimization scheme of the present utility model, the heat dissipation fins 12 adopt a structure of uneven length, and the heat dissipation fins 12 of uneven length are intersected and distributed equidistantly on the bottom of the semiconductor refrigeration sheet 10, and cooling is realized from the bottom. Heat dissipation.

As a technical optimization scheme of the present invention, the filter 21, the inverter bridge 22, the single-phase transformer 23, the relay 24, the touch screen 3 and the interior of the terminal 6 are electrically connected to realize the function of the inverter.

As a technical optimization scheme of the present utility model, the top cover 1 and the shell 5 are engaged and connected, and the two sides of the bottom of the top cover 1 are welded with protrusions 7; the bottom of the protrusion 7 is welded with a mounting plate 11, Easy to disassemble.

When the utility model is in use, the photovoltaic inverter with heat dissipation structure is connected to the photovoltaic controller and the transformer through the terminal 6, and the power supply of the photovoltaic panel is adjusted to complete the inverter function. When the photovoltaic inverter is working, the micro The blower 8 draws the external air into the side of the aluminum plate 4 through the ventilation hole 15 to exchange heat with the inner box 2 to achieve heat dissipation for the components inside the inner box 2, and the negative pressure fan 14 on the other side blows the inner box The heat of the body 2 is extracted to achieve heat dissipation to the inner box 2, and at the same time, the heat at the bottom of the inner box 2 is exported through the semiconductor cooling sheet 10 and the heat dissipation fin 12 pairs through the thermal paste sheet 9 and 13 silica gel heat conducting sheets. Heat exchange to achieve the purpose of heat dissipation and cooling.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. a kind of photovoltaic DC-to-AC converter with radiator structure, including top cover（1）, internal box（2）And shell（5）, it is characterised in that： The top cover（1）Surface is provided with touch-screen（3）, and top cover（1）Bottom is provided with shell（5）；The shell（5）Surface is provided with wiring Post（6）, and shell（5）Inside is provided with internal box（2）；The internal box（2）With top cover（1）Between be provided with aluminium sheet（4）, and interior case Body（2）Both sides pass through aluminium sheet（4）Micro-blower is connected respectively（8）And negative-pressure air fan（14）；The micro-blower（8）With it is negative Pressure fan（14）Side be provided with air vent（15）, and air vent（15）Side be provided with projection（7）；The projection（7）Bottom Portion side is provided with installing plate（11）, the internal box（2）Inside is sequentially provided with wave filter（21）, inverter bridge（22）, single-phase transformation Device（23）And relay（24）, and internal box（2）Bottom be provided with heat-conducting cream piece（9）；The heat-conducting cream piece（9）Bottom is provided with silicon Glue thermally conductive sheet（13）, and silica gel thermally conductive sheet（13）Bottom passes through heat-conducting cream piece（9）Connect semiconductor chilling plate（10）, and semiconductor Cooling piece（10）Bottom be provided with radiating fin（12）.

A kind of 2. photovoltaic DC-to-AC converter with radiator structure according to claim 1, it is characterised in that：The projection（7） It is and raised provided with several（7）Between spacing be equally distributed in shell（5）Two sides.

A kind of 3. photovoltaic DC-to-AC converter with radiator structure according to claim 1, it is characterised in that：The projection（7） Between open up air vent（15）, and air vent（15）Using horn-like.

A kind of 4. photovoltaic DC-to-AC converter with radiator structure according to claim 1, it is characterised in that：The radiating fin （12）Using uneven in length structure, and uneven in length radiating fin（12）Intersect, be equally distributed on semiconductor chilling plate （10）Bottom.

A kind of 5. photovoltaic DC-to-AC converter with radiator structure according to claim 1, it is characterised in that：The wave filter （21）, inverter bridge（22）, single-phase transformer（23）, relay（24）, touch-screen（3）And binding post（6）Electrically connect between inside Connect.

A kind of 6. photovoltaic DC-to-AC converter with radiator structure according to claim 1, it is characterised in that：The top cover（1） With shell（5）Between be connected together, and top cover（1）Two bottom sides solder-bump（7）；The projection（7）Bottom welding peace Loading board（11）.