CN217693253U

CN217693253U - Heat radiator for photovoltaic inverter

Info

Publication number: CN217693253U
Application number: CN202221494712.XU
Authority: CN
Inventors: 丁倩
Original assignee: Goodwe Technologies Co Ltd
Current assignee: Goodwe Technologies Co Ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-10-28
Anticipated expiration: 2032-06-15

Abstract

The utility model discloses a heat dissipation device of a photovoltaic inverter, which comprises a radiator and a fan, wherein the radiator is arranged on the photovoltaic inverter and comprises a shell and a plurality of fins, the fins are arranged in parallel inside the shell, the fins are vertically arranged relative to the photovoltaic inverter and form a plurality of upward air channels with the shell, the fan is arranged at the lower part of one vertical side surface of the shell and is communicated with the inside of the shell, and the air flow generated by the fan flows to the other vertical side surface along the bottom surface of the shell; in any two adjacent fins, the distance between one fin close to one side of the fan and the bottom surface of the shell is larger than the distance between the other fin and the bottom surface of the shell. The utility model provides a photovoltaic inverter's heat abstractor utilizes the side direction air inlet to dispel the heat to the inlet air channel of radiator, has avoided external grit to drop the fan through the radiator and the fan that arouses is shut down, has guaranteed radiating stability.

Description

Heat radiator for photovoltaic inverter

Technical Field

The utility model relates to a photovoltaic inverter's forced air cooling heat dissipation technical field especially relates to a photovoltaic inverter's heat abstractor.

Background

In the prior art, the function of a photovoltaic inverter is to invert the direct current generated by the solar panels into alternating current that can be used directly or incorporated into the grid. During operation of the inverter, the components, IGBT modules and diodes, generate a significant amount of heat that must be transferred to the air through a heat sink to ensure that the components are within the operating temperature range without failing. At present, two heat dissipation modes, namely natural heat dissipation and air cooling heat dissipation, are available, and an air cooling heat dissipation system is required to be adopted for a high-power high-loss machine. The photovoltaic inverter who adopts air cooling system now is that the fan is placed in the bottom more, and the radiator is on fan upper portion, and the fan bloies up, and the air inlet direction is parallel with the fin, works in the great environment of sand blown by the wind when the dc-to-ac converter, and there is the foreign matter at the top to fall into the wind channel, falls then on the fan of work, destroys the flabellum very easily, influences the normal work of fan. Especially small size fans, e.g. 40mm in diameter, are easily blocked by foreign objects. When the fan is not working properly, the heat dissipation of the machine will deteriorate and cause the high temperature burning of the components, so the improvement is needed.

The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application nor give technical teaching; the above background should not be used to assess the novelty or inventiveness of the present application in the event that there is no clear evidence that the above disclosure has been made prior to the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides a heat dissipation device of a photovoltaic inverter. The technical scheme is as follows:

a heat dissipation device of a photovoltaic inverter comprises a heat radiator and a fan, wherein the heat radiator is arranged on the photovoltaic inverter and comprises a shell and a plurality of fins, the fins are arranged in the shell in parallel, the fins are vertically arranged relative to the photovoltaic inverter and form a plurality of upward air channels with the shell, the fan is arranged at the lower part of one side face of the shell and is communicated with the inside of the shell, and airflow generated by the fan sequentially passes through each fin along the bottom face of the shell;

in any two adjacent fins, the distance between the lower end of one fin close to one side of the fan and the bottom surface of the shell is larger than the distance between the lower end of the other fin and the bottom surface of the shell.

Further, the lower end of the fin farthest from the fan extends to the bottom surface of the shell.

Furthermore, the height between the lower end of the fin closest to the fan and the bottom surface of the shell is greater than or equal to the height between the upper end of the fan and the bottom surface of the shell.

Further, the center points of the lower ends of all the fins are collinear.

Further, the included angle between the straight line and the vertical plane is more than 50 degrees and less than 70 degrees.

Further, the included angle range of the central axis of the air duct and the horizontal plane is 70-90 degrees.

Further, the spacing between adjacent fins is equal.

Further, the distance between the adjacent fins becomes smaller along the air inlet direction of the fan

Further, the air inlet direction of the fan and the central axis of the air duct form an included angle of 85-95 degrees.

Furthermore, the bottom of the shell is provided with a detachable bottom plate, and the top of the shell is provided with a metal mesh plate.

The utility model provides a beneficial effect that technical scheme brought as follows: utilize the side direction air inlet to dispel the heat to the inlet air duct of radiator, avoided external grit to drop the fan through the radiator and the fan that arouses is shut down, guaranteed radiating stability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic perspective view of a single fan mode in a heat dissipation device according to an embodiment of the present invention;

fig. 2 is a schematic vertical sectional view of a single fan mode in the heat dissipation apparatus according to an embodiment of the present invention;

fig. 3 is a schematic view of simulation effect of each air duct in a single fan mode in the heat dissipation device according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a dual-fan mode in the heat dissipation device according to the embodiment of the present invention;

fig. 5 is a schematic vertical sectional view of a dual-fan mode in the heat dissipation apparatus according to an embodiment of the present invention;

wherein the reference numerals include: the photovoltaic power generation system comprises a photovoltaic inverter 1, a radiator 2, fins 21, a metal screen plate 22, a detachable bottom plate 23, a wind shield 24, an air duct 25, a fan 3 and an inductor 4.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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 efforts shall belong to the protection scope of the present invention.

In an embodiment of the present invention, a heat dissipation device for a photovoltaic inverter is provided, referring to fig. 1, including a heat sink 2 and a fan 3, the heat sink 2 is disposed on the photovoltaic inverter 1 to dissipate heat of the photovoltaic inverter, the heat sink 2 includes a housing and a plurality of fins 21, referring to fig. 2, the fins 21 are disposed in parallel inside the housing, the fins 21 are disposed upright relative to the photovoltaic inverter, and constitute a plurality of upward air channels 25 with the housing, a side of the fins 21 exchanges heat with a metal casing of the photovoltaic inverter to transfer heat to the air channels 25, an air outlet of each air channel 25 is disposed at the top, an air inlet thereof is disposed at the bottom, the fan 3 is disposed at a lower portion of a side surface of the housing and communicates with the inside of the housing, an air flow generated by the fan 3 sequentially passes through each fin 21 along a bottom surface of the housing, thereby flowing into the air inlet of each air channel to dissipate heat.

In order to enable the side wind generated by the fan to smoothly flow into the air channels, in any two adjacent fins 21, the distance between one fin 21 close to one side of the fan 3 and the bottom surface of the shell is larger than the distance between the other fin 21 and the bottom surface of the shell, namely, the two sides of the lower end of each air channel are staggered, the lower end of one side far away from the fan is longer, so that when the side wind blows, partial air flow is blocked by the staggered fin length, and therefore the side wind flows into the air channels. The fins can be pulled into respective air channels at a first level, so that the air quantity is relatively uniform.

In an embodiment of the present invention, the height between the lower end of the fin 21 closest to the fan 3 and the bottom surface of the housing is greater than or equal to the height between the upper end of the fan 3 and the bottom surface of the housing, so that the airflow generated by the fan 3 can completely enter the interior of the housing, thereby facilitating the air volume distribution of each subsequent air channel; the lower end of the fin 21 farthest from the fan 3 extends to the bottom surface of the housing, so that the airflow generated by the fan 3 reaches the position and cannot continue to advance, backflow is formed, and the airflow is limited by the bottom surface of the housing and can only move upwards, and the generated air volume is fully utilized.

In order to make the air flow into each air duct more uniform, referring to fig. 2, the length of the dislocation of the lower end of each air duct is the same, that is, the central points of the lower ends of all the fins 21 are collinear, the included angle between the straight line and the vertical plane, which is called the multi-fin arrangement angle, is in the range of (0 °,90 °), preferably (50 °,70 °), and when β =60 °, the air flow of the air duct is simulated for the case that the distances between adjacent fins 21 are equal, referring to fig. 3, the maximum single air duct air speed is about 5.98m/s, the single air duct air speed is not less than 1.18m/s, and only one air duct is slightly lower, and the air flow of the whole air duct is uniform. In a preferred embodiment, the width of each air channel can be adjusted to further uniform the air volume of each air channel, for example, the distance between the fins 21 is designed to be smaller along the air inlet direction of the fan 3, the width of the far-end air channel is reduced to reduce the air volume of the far-end air channel, and the width of the near-end air channel is increased to increase the air volume of the near-end air channel, so that the overall heat dissipation is more uniform.

In order to enable the side wind to flow out from the top of the air duct more smoothly, an included angle between a central axis of the air duct 25 and a horizontal plane ranges from 70 degrees to 90 degrees, an included angle between an air inlet direction of the fan 3 and the central axis of the air duct 25 ranges from 85 degrees to 95 degrees, and in a preferred embodiment, when the included angle between the central axis of the air duct 25 and the horizontal plane is 90 degrees, an included angle between the air inlet direction of the fan 3 and the central axis of the air duct 25 is designed to be 90 degrees.

The utility model discloses an embodiment, the bottom of casing is equipped with can dismantle bottom plate 23 to in the clearance fall into the gravel of radiator, avoid the gravel to pile up, its top is equipped with metal mesh plate 22, so that prevent falling into the wind channel and blockking up the wind channel of the great foreign matter of volume, its front portion is equipped with deep bead 24, is convenient for the maintenance workman to maintain the replacement to the fin.

The utility model discloses an in the embodiment, still be equipped with inductance 4 on the photovoltaic inverter 1, inductance 4 also can pass through heat abstractor dispels the heat. When two fans are needed to be parallel to further improve the heat dissipation efficiency, referring to fig. 4 and 5, one fan is respectively placed on the left side and the right side, the wind directions of the two corresponding fans are oppositely arranged, a baffle is arranged in the middle, the number of the fins on the two sides is consistent, the whole structure is in a bilateral symmetry structure, the left multi-fin arrangement angle alpha is equal to the right multi-fin arrangement angle gamma, the structure can also be in an asymmetric structure, alpha is not equal to gamma, if the fans with different sizes are adopted on the left side and the right side, the number of the corresponding fins on each side is also different, the number of the fins on one side of the fan with large air volume is larger, the number of the fins on one side of the fan with small air volume is smaller, and the specific number can be designed according to the heat dissipation requirement. It should be noted that the dual fan duct assembly is designed similarly to a single fan system, with the side closest to the fan being the shortest and the side further from the fan being the longest and increasing.

The utility model provides a photovoltaic inverter's heat abstractor solves the problem that the foreign matter that drops influences the fan operation, and the design of wind channel subassembly is guaranteed that the wind volume is even in the wind channel simultaneously, does not influence the heat dissipation, and its bottom plate is convenient to be dismantled, the clearance of being convenient for. The heat dissipation device utilizes the lateral air inlet to dissipate heat of the air inlet channel of the radiator, avoids the fan halt caused by the falling of external sand stones to the fan through the radiator, and ensures the stability of heat dissipation.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The heat dissipation device of the photovoltaic inverter is characterized by comprising a heat radiator (2) and a fan (3), wherein the heat radiator (2) is arranged on the photovoltaic inverter (1) and comprises a shell and a plurality of fins (21), the fins (21) are arranged in parallel inside the shell, the fins (21) are vertically arranged relative to the photovoltaic inverter (1) and form a plurality of upward air channels (25) with the shell, the fan (3) is arranged at the lower part of one side surface of the shell and is communicated with the inside of the shell, and airflow generated by the fan (3) sequentially passes through each fin (21) along the bottom surface of the shell;

in any two adjacent fins (21), the distance between the lower end of one fin (21) close to one side of the fan (3) and the bottom surface of the shell is larger than the distance between the lower end of the other fin (21) and the bottom surface of the shell.

2. The heat dissipating device according to claim 1, wherein the lower end of the fin (21) farthest from the fan (3) extends to the bottom surface of the housing.

3. The heat dissipating device according to claim 1, wherein the height of the lower end of the fin (21) closest to the fan (3) from the bottom surface of the housing is greater than or equal to the height of the upper end of the fan (3) from the bottom surface of the housing.

4. The heat sink as claimed in claim 1, wherein the center points of the lower ends of all the fins (21) are collinear.

5. The heat sink according to claim 4, wherein the angle between the straight line and the vertical plane is greater than 50 ° and less than 70 °.

6. The heat sink according to claim 1, wherein the central axis of the air duct (25) is at an angle in the range of 70 ° to 90 ° to the horizontal.

7. The heat sink as claimed in claim 1, characterized in that the spacing between adjacent fins (21) is equal.

8. The heat dissipating device as claimed in claim 1, wherein the spacing between adjacent fins (21) becomes smaller along the air intake direction of the fan (3).

9. The heat sink as claimed in claim 1, wherein the air inlet direction of the fan (3) is in the range of 85 ° to 95 ° with respect to the central axis of the air duct (25).

10. The heat sink as recited in claim 1, wherein the bottom of the housing is provided with a removable bottom plate (23) and the top of the housing is provided with a metal mesh plate (22).