Heat dissipation structure of inverter

Abstract

The utility model belongs to the field of inverters, and discloses a heat radiation structure of an inverter, the inverter comprises a box body, the box body is provided with a length direction, a direction vertical to the length direction is taken as a width direction, the heat radiation structure comprises a fan, an air uniformizing plate with first ventilation holes, and a heat radiator, the fan, the air uniformizing plate and the radiator are sequentially and fixedly installed in the box body in the width direction, an air supply channel is formed through an air inlet in the box body, the fan, the air uniformizing plate, the radiator and an air outlet in the box body, and the air uniformizing plate is in a 2D or 3D shape. The center point of the fan, the center point of the air uniformizing plate and the center point of the radiator are all located on the same straight line. According to the practical use condition, the air uniformizing effect of the heat dissipation structure is improved by using the 2D air uniformizing plates and the 3D air uniformizing plates, the 2D air uniformizing plates and the 3D air uniformizing plates are different in aperture ratios and opening included angles, and gaps exist between the end portions of all the ends of the air uniformizing plates and the extension lines of all the side walls of the heat dissipation device in the width direction.

Description

Technical Field

[0001] This utility model belongs to the field of inverters, and specifically relates to a heat dissipation structure for an inverter. Background Technology

[0002] High-power photovoltaic-storage hybrid inverters have increasingly higher requirements for reliability and size, and the bottleneck in improving reliability and reducing size lies in the layout of the heat dissipation system.

[0003] Currently, the heat-generating components of high-power inverters need to transfer heat to the outside of the inverter cavity through the heat sink casing, and then be cooled by an external fan. However, the uniformity of airflow in the internal heat dissipation space is very important. If the design is not reasonable, the local temperature inside the chassis will be higher than the rated operating value for a long time, which will affect the life and reliability of the internal components, and thus affect the overall service life of the high-power inverter.

[0004] To address the aforementioned issues, most current solutions employ a multi-fan design approach. For example, CN219592260U and CN204217286U both utilize numerous fans, which increases costs and fails to consider the issue of even airflow within the internal space. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a heat dissipation structure for inverters, aiming to optimize airflow within the heat dissipation components in the case of a single fan, thereby improving the heat dissipation effect of the inverter.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A heat dissipation structure for an inverter includes a housing with a length direction and a width direction perpendicular to the length direction. The heat dissipation structure includes a fan, a heat spreader with a first ventilation hole, and a heat sink. The fan, heat spreader, and heat sink are sequentially fixed inside the housing along the width direction. An air supply channel is formed by the air inlet on the housing, the fan, the heat spreader, the heat sink, and the air outlet on the housing. The heat spreader is 2D or 3D in shape.

[0008] The center point of the fan, the center point of the air distribution plate, and the center point of the heat sink are all located on the same straight line; the heat sink extends along the length direction with its center point or extends in the opposite direction of the length direction; when the air distribution plate is 2D in shape, there is a gap between each end of the air distribution plate and the extension line of each side wall on the heat sink in the width direction.

[0009] Alternatively, when the air distribution plate is 3D shaped, each end of the air distribution plate coincides with the extension of each sidewall on the radiator in the width direction.

[0010] Preferably, when the air distribution plate is 2D in shape, the air distribution plate is V-shaped, and the opening of the V-shaped air distribution plate faces the radiator, and the first ventilation hole on the air distribution plate has a predetermined opening ratio.

[0011] Furthermore, the V-shaped air distribution plate has a predetermined opening angle.

[0012] Preferably, when the air distribution plate is a 2D shape, the air distribution plate is a straight plate shape.

[0013] Preferably, when the air distribution plate is 3D in shape, the air distribution plate is composed of multiple columnar structures arranged from the center along the length direction or in the opposite direction of the length direction, and there is a gap between each two adjacent columnar structures, which is an air supply channel.

[0014] Preferably, the distance between the bottom and top of each box is equal to the length of the columnar structure, and the columnar structure has a predetermined diameter and a predetermined height, with a predetermined spacing between each pair of adjacent columnar structures.

[0015] Preferably, a cover plate is installed on the upper surface of the housing by screws, and the cover plate covers the upper surface of the fan, the upper surface of the air distribution plate and the upper surface of the heat sink on the housing.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. Because this utility model can adopt a 2D air distribution plate with a predetermined opening ratio, a predetermined opening angle, and a gap between each end of the air distribution plate and each side wall on the radiator in the width direction, as well as a 3D air distribution plate with a predetermined diameter, predetermined spacing, and predetermined height, according to actual use, so as to improve the air distribution effect of the heat dissipation structure.

[0018] 2. Because this utility model uses a single fan, a V-shaped air distribution plate, and a heat sink as the heat dissipation structure, and there is a gap between the edge of the V-shaped air distribution plate and the edge of the heat sink along the extension line in the width direction, the purpose is to avoid the airflow being concentrated in the middle of the V-shaped air distribution plate, but to disperse it on the V-shaped air distribution plate, so as to improve the uniformity of the airflow; and the opening of the V-shaped air distribution plate faces the heat sink, and the opening angle β is 120-150°, so the airflow uniformity of this heat dissipation structure is good.

[0019] 3. Because this utility model uses a single fan, a straight-plate wind distribution plate, and a heat sink as the heat dissipation structure, and there is a gap between the edge of the straight-plate wind distribution plate and the edge of the heat sink along the extension line in the width direction, the purpose is to avoid the airflow being concentrated in the middle of the straight-plate wind distribution plate, but to disperse it on the straight-plate wind distribution plate, so as to improve the uniformity of the airflow; and the opening rate of the first through hole on the straight-plate wind distribution plate is 25-68%, so the airflow uniformity of this heat dissipation structure is good.

[0020] 4. Because this utility model uses a single fan and multiple columnar structures to form a wind-dissipating plate and a radiator as the heat dissipation structure, and the edges of the wind-dissipating plate formed by multiple columnar structures coincide with the extension lines of the edges of the radiator in the width direction, the uniformity of airflow is improved. Furthermore, due to the existence of the columnar structure, i.e., the gap between each two adjacent columnar structures and the distance between the bottom and top of each box being equal to the length of the columnar structure, and the diameter of the columnar structure, dust accumulation can be reduced during operation. Moreover, the wind resistance is smaller compared to V-shaped and straight-plate wind-dissipating plates. Therefore, while achieving good wind distribution performance, the airflow rate is less affected, resulting in high heat dissipation efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention with a cover plate;

[0022] Figure 2 This is a schematic diagram of the structure of the present invention in Embodiment 1 after the cover plate is removed and the opening angle of the V-shaped wind-dispersing plate is 120°.

[0023] Figure 3 This is a schematic diagram of the structure of the present invention after removing the cover plate in Embodiment 1 and when the opening angle of the V-shaped wind-dispersing plate is 150°.

[0024] Figure 4 This is a schematic diagram showing the positions of the PV boost power module, BAT boost power module, inverter power module, inverter inductor, PV inductor, and BAT inductor respectively installed in the enclosure in this utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the present invention after the cover plate is removed in Embodiment 2, and the air distribution plate is a straight air distribution plate;

[0026] Figure 6 This is a cross-sectional view of the present invention in Embodiment 1;

[0027] Figure 7 This is a cross-sectional view of the present invention in Embodiment 3;

[0028] Figure 8This is a schematic diagram of the structure of the present invention after removing the cover plate in Embodiment 3, and the air distribution plate is a multi-column structure;

[0029] Figure 9 This is a thermodynamic simulation diagram when the opening ratio of the first through hole is 25%.

[0030] Figure 10 Thermodynamic simulation diagram for the first through hole with an opening ratio of 35%;

[0031] Figure 11 The diagram shows a thermodynamic simulation of the first through hole with an opening ratio of 55%.

[0032] Figure 12 Thermodynamic simulation diagram for the first through hole with an opening ratio of 68%;

[0033] Figure 13 This is a schematic diagram of a thermodynamic simulation when the opening angle β is 120°.

[0034] Figure 14 This is a schematic diagram of a thermodynamic simulation when the opening angle β is 150°.

[0035] In the diagram: 1. Housing; 2. Fan; 3. Air distribution plate; 31. First ventilation hole; 32. Columnar structure; 33. V-shaped air distribution plate; 34. Straight plate air distribution plate; 4. Heat sink; 41. Heat dissipation fins; 5. Cover plate; 6. PV boost power module; 7. BAT boost power module; 8. Inverter power module; 9. Inverter inductor; 10. PV inductor; 11. BAT inductor; 12. Second ventilation hole. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following embodiments are described in detail with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0037] The English translations of the Chinese characters are shown in the table below:

[0038]

[0039] Example 1

[0040] like Figure 1-4As shown, a heat dissipation structure for an inverter includes a housing 1 with a length direction B and a width direction A perpendicular to the length direction B. The heat dissipation structure includes a fan 2, a V-shaped heat dissipation plate 33 with a first ventilation hole 31, and a heat sink 4. The fan 2, the V-shaped heat dissipation plate 33, and the heat sink 4 are sequentially fixed inside the housing 1 along the width direction A. An airflow channel is formed through the air inlet on the housing 1, the fan 2, the V-shaped heat dissipation plate 33, the heat sink 4, and the air outlet on the housing 1. The heat dissipation plate is 2D in shape, with the center point of the fan 2 and the center point of the V-shaped heat dissipation plate 33... The center point of the heat sink 4 and the center point of the radiator 4 are both located on the same straight line; the heat sink 4 extends along the length direction B or in the opposite direction of the length direction B with its center point; there is a gap L between each end of the V-shaped air distribution plate 33 and each sidewall on the heat sink 4 on the extension line of the width direction A (it should be noted that the gap L is predetermined according to the actual situation of the heat dissipation structure); and the opening of the V-shaped air distribution plate 33 faces the heat sink 4, and the V-shaped air distribution plate 33 has a predetermined opening angle (it should be noted that the predetermined opening angle is predetermined according to the actual situation of the heat dissipation structure), and the opening angle β in this embodiment is 120° and 150° (e.g. Figure 13-14 As shown), the first ventilation hole 31 on the V-shaped air distribution plate 33 has a predetermined opening ratio; a cover plate 5 is installed on the upper surface of the housing 1 by screws, and the cover plate 5 covers the upper surface of the fan 2, the upper surface of the V-shaped air distribution plate 33 and the upper surface of the radiator 4 on the housing 1.

[0041] The inverter used in this utility model is a photovoltaic-storage hybrid inverter, which includes a PV boost power module 6; a BAT boost power module 7; an inverter power module 8; an inverter inductor 9; a PV inductor 10; and a BAT inductor 11. The PV boost power module 6, the BAT boost power module 7, and the inverter power module 8 are respectively as follows: Figure 4 As shown, it is installed on the radiator 4, and the casing 1 is also provided with a second ventilation hole 12 (the second ventilation hole 12 is attached to the radiator 4). Figure 6 This is reflected in the appendix, therefore... Figure 1-4 (Not shown in the text) The air blown by the fan enters the housing 1 through the second ventilation hole 12 at the positions corresponding to the inverter inductor 9, PV inductor 10, and BAT inductor 11, to dissipate heat from the inverter inductor 9, PV inductor 10, and BAT inductor 11; specifically, it is installed on the heat sink fins 41 (such as... Figure 2 , 3 As shown, the number of heat dissipation fins 41 is several and arranged sequentially along the length direction B, with a ventilation gap between each two adjacent heat dissipation fins 41; while the inverter inductor 9; PV inductor 10 and BAT inductor are arranged as follows Figure 4 It is installed on housing 1 as shown.

[0042] Example 2

[0043] This embodiment is basically the same as Embodiment 1, except that, as Figure 5-6 As shown, the air distribution plate 3 in this embodiment is a straight plate shape, that is, a straight plate-shaped air distribution plate 34 without any opening angle; it should also be noted that the opening ratio of the first ventilation hole 31 on the straight plate-shaped air distribution plate 34 is predetermined according to the actual situation of the heat dissipation structure, and the opening ratio in this embodiment is 25%, 35%, 55% and 68% (e.g. Figure 9-12 ).

[0044] Example 3

[0045] This embodiment is basically the same as Embodiment 1, except that, as Figure 7-8 As shown, the air distribution plate in this embodiment is 3D in shape. Each end of the air distribution plate 3 coincides with the extended lines of each sidewall on the adjacent radiator 4 in the width direction. The columnar structure has a predetermined diameter (which is predetermined based on the actual conditions of the heat dissipation structure) and a predetermined height (which is predetermined based on the actual conditions of the heat dissipation structure). There is a predetermined spacing between each pair of adjacent columnar structures (which is predetermined based on the actual conditions of the heat dissipation structure). Specifically, the air distribution plate 3 consists of multiple columnar structures 32 arranged from the center along the length direction B or in the opposite direction of the length direction B, with a gap between each pair of adjacent columnar structures 32. This gap serves as an air supply channel. The purpose is to minimize the impact of dust accumulation during long-term operation. Furthermore, the wind resistance is smaller than that of a planar baffle, resulting in good air distribution performance while minimizing the impact on the air outlet rate and achieving high heat dissipation efficiency.

[0046] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. A heat dissipation structure of an inverter including a case, characterized by, The box has a length direction, and a direction perpendicular to the length direction is a width direction. The heat dissipation structure includes a fan, a uniform air plate with first air holes, and a radiator. The fan, the uniform air plate, and the radiator are sequentially fixed and installed in the interior of the box along the width direction. An air supply channel is formed through an air inlet on the box, the fan, the uniform air plate, the radiator, and an air outlet on the box. The uniform air plate is in a 2D or 3D shape. The center point of the fan, the center point of the uniform air plate, and the center point of the radiator are located on the same straight line. The radiator extends along the length direction or reversely extends along the length direction with the center point as the center. When the uniform air plate is in a 2D shape, a gap exists between each end of the uniform air plate and the extension of each side wall of the radiator in the width direction. When the uniform air plate is in a 3D shape, each end of the uniform air plate coincides with the extension of each side wall of the radiator in the width direction.

2. The heat dissipation structure of an inverter according to claim 1, characterized in that: When the uniform air plate is in a 2D shape, the uniform air plate is in a V shape, and the opening of the V-shaped uniform air plate faces the radiator. The first air holes on the uniform air plate have a predetermined opening rate.

3. The heat dissipation structure of an inverter according to claim 2, wherein: The V-shaped uniform air plate has a predetermined opening angle.

4. The heat dissipation structure of an inverter according to claim 1, characterized in that: When the uniform air plate is in a 2D shape, the uniform air plate is in a straight plate shape.

5. The heat dissipation structure of an inverter according to claim 1, characterized in that: When the uniform air plate is in a 3D shape, the uniform air plate is arranged by a plurality of columnar structures from the center along the length direction or reversely along the length direction, and a gap exists between each adjacent two columnar structures. The gap is the air supply channel.

6. The heat dissipation structure of an inverter according to claim 5, wherein: The distance between the bottom of each box and the top of the box is equal to the length of the columnar structure. The columnar structure has a predetermined diameter and a predetermined height, and a predetermined interval exists between each adjacent two columnar structures.

7. The heat dissipation structure of an inverter according to any one of claims 3, 4, 6, characterized in that: The upper surface of the box is provided with a cover plate through screws. The cover plate covers the upper surface of the fan, the upper surface of the uniform air plate, and the upper surface of the radiator on the box.

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