Inductor box and inverter

Abstract

The utility model provides an inductance box and inverter relates to inverter technical field, the inductance box includes box main part and radiating fin, radiating fin is provided on box main part's outer wall, there is the ventilation gap between adjacent radiating fin, radiating fin includes inclined fin and straight fin, the inclined fin is provided on box main part's outer top wall, the straight fin is provided with the ventilation gap between adjacent radiating fin, the inclined fin is provided on the box main part's outer top wall, and the straight fin is provided on the box main part's outer top wall. The straight fins are arranged on the outer side wall of the box body, the outer top wall and the outer side wall of the box body intersect to form side edges, the projections of the inclined fins in the extending direction intersect with the straight line where the side edges are located, and the projections of the straight fins in the extending direction are parallel to the straight line where the side edges are located or intersect with the straight line where the side edges are located. Due to the arrangement mode that the top face inclined fins and the side face straight fins are combined, when a fan is arranged in an offset mode, air can evenly enter ventilation gaps between the outer top wall and the outer side wall of the inductor box. The inductor box has the effect that the heat dissipation capability of different parts of the inductor box is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of inverters, and in particular to an inductor box and an inverter. Background Art

[0002] Inductors are a crucial component of photovoltaic inverters, providing energy storage, voltage boosting, filtering, and electromagnetic interference mitigation. Inductor boxes are primarily used to mount and protect these components. Because inductors generate significant heat during operation, the heat dissipation design of the inductor box is crucial for improving the performance and lifespan of the inductor.

[0003] Existing inductor boxes often use fins around the outer perimeter to improve heat dissipation efficiency. Fins are densely arranged to increase the heat dissipation area, with ventilation gaps left between the fins. Cooling fans are installed within the inverter to increase air flow within the ventilation gaps, thereby accelerating heat dissipation.

[0004] However, the cooling fan is primarily used to cool the radiator in the inverter. Therefore, when installing the cooling fan, it is usually placed close to the radiator, while the inductor box is usually placed to the side of the radiator. In other words, the inductor box is not directly facing the cooling fan, but is offset relative to the cooling fan. For the inductor box, the offset cooling fan makes it difficult for airflow to flow evenly through the ventilation gaps. The fins on the side closest to the cooling fan block the fins on the side away from the cooling fan. This uneven airflow causes large temperature differences in different parts of the inductor box, affecting the performance of the inductor box and the inverter. Utility Model Content

[0005] The problem solved by the utility model is how to uniformly dissipate heat from various parts of the inductance box to reduce the temperature difference.

[0006] In order to solve the above problems, the utility model provides an inductor box and an inverter.

[0007] In the first aspect, the present invention provides an inductor box, which adopts the following technical solution:

[0008] An inductor box includes a box body and heat dissipation fins, wherein the heat dissipation fins are arranged on the outer wall of the box body, and ventilation gaps are provided between adjacent heat dissipation fins. The heat dissipation fins include oblique fins and straight fins, wherein the oblique fins are arranged on the outer top wall of the box body, and the straight fins are arranged on the outer side wall of the box body. The outer top wall and the outer side wall of the box body intersect to form a side edge, the projection of the extension direction of the oblique fin intersects with the straight line where the side edge is located, and the projection of the extension direction of the straight fin is parallel to the straight line where the side edge is located or intersects with the straight line where the side edge is located.

[0009] The beneficial effect of the present invention is that the heat dissipation fins outside the inductor box are changed to an arrangement combining oblique fins on the outer top wall and straight fins on the outer side wall, which can reduce the mutual obstruction between adjacent fins when the fan is offset relative to the inductor box, so that the air flow in the ventilation gaps at various parts of the outer top wall and the outer side wall of the inductor box is more uniform, thereby increasing the range of wind force without changing the wind force and the fan position, so that the inductor temperature at the end of the inductor box close to the fan and the end far from the fan is more uniform, thereby ensuring the normal use of the inductor box and the inverter.

[0010] Optionally, the oblique fins include long wings and short wings, the ends of the long wings are flush with the edge of the outer top wall, the ends of the short wings are spaced apart from the edge of the outer top wall, and the long wings and the short wings are alternately and spaced apart.

[0011] Optionally, two ends of the straight fin are respectively a near-wind end and a far-wind end, and the height of the near-wind end is smaller than the height of the far-wind end.

[0012] Optionally, adjacent heat dissipation fins are parallel to each other and have equal spacing therebetween.

[0013] Optionally, the angle between the oblique fin and the side edge ranges from 30° to 60°.

[0014] In the second aspect, the utility model provides an inverter, including a shell and the inductor box as described above, the shell is used to install the inductor box, the radiator, and the fan, the fan is arranged toward the radiator, and the inductor box is arranged on one side of the radiator with its straight fins facing the radiator.

[0015] Since the technical improvements and technical effects of the inverter are the same as those of the inductor box, the inverter will not be described in detail.

[0016] Optionally, the two inductor boxes are respectively located on both sides of the radiator, the fan is fixedly mounted on a first side wall of the shell, and an exhaust port is provided on a second side wall of the shell opposite to the first side wall.

[0017] Optionally, a plurality of fans are provided between two of the inductor boxes, a first air duct is formed between the box body of the inductor box and the radiator, and at least one fan is provided facing the first air duct.

[0018] Optionally, a second air duct is formed between the box body of the inductance box and the inner top wall of the shell.

[0019] Optionally, a porous plate is further provided on the second side wall, and the porous plate is used to block the exhaust port. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1Schematic diagram of the distribution of heat dissipation fins of an inductor box in the prior art.

[0021] Figure 2 This is a structural diagram of the inductor box according to Example 1 of the present utility model.

[0022] Figure 3 This is a schematic diagram of the distribution of heat dissipation fins in Example 1 of the present utility model.

[0023] Figure 4 This is a schematic diagram of the heat dissipation fin distribution of Example 2 of the present utility model.

[0024] Figure 5 This is a schematic diagram of the inverter structure of Example 3 of the present utility model.

[0025] Figure 6 This is a schematic diagram of the positional relationship of the components inside the inverter housing of Example 3 of the present utility model.

[0026] Figure 7 This is a schematic diagram of the air flow in the heat dissipation cavity in Example 3 of the present utility model.

[0027] Description of reference numerals:

[0028] 1. Box body; 11. Outer top wall; 12. Outer side wall; 13. Side edge; 2. Heat dissipation fins; 2a. Top fins; 2b. Side fins; 21. Oblique fins; 211. Long fins; 212. Short fins; 22. Straight fins; 221. Near-wind end; 222. Far-wind end; 3. Ventilation gap; 4. Shell; 41. Exhaust vent; 5. Cover; 6. Radiator; 7. Fan; 8. Heat dissipation chamber; 81. First air duct; 82. Second air duct; 9. Perforated plate. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0030] The X-axis, Y-axis, and Z-axis introduced in the accompanying drawings can be used to express horizontal, longitudinal, and vertical directions. It should be noted that they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0031] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in this utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0033] In related technologies, a cooling fan is often installed in the inverter to improve the heat dissipation efficiency, and fins are installed on the outer wall of the inductor box to assist in the heat dissipation of the inductor box. However, the cooling fan is mainly used to cool the radiator, so when laying it out, the cooling fan is often placed close to the radiator, resulting in uneven wind flow to the fins of the inductor box. Figure 1 As shown, the top wall of the existing inductor box is provided with a plurality of top fins 2a parallel to the edge of the box body. Point O in the figure represents the installation position of the cooling fan, the fan-shaped circle with point O as the center represents the range of wind action, and R represents the wind radius of the cooling fan. According to the fin arrangement in the related art, when the cooling fan is offset relative to the inductor box, there is mutual shielding between the fins. Only the gaps between the top fins 2a in the shaded part of the inductor box (i.e., the area marked with a small cross symbol in the figure) can be effectively affected by the cooling fan, while the air in the ventilation gaps in the non-shaded part is difficult to effectively flow and dissipate heat, resulting in uneven heat dissipation between the side of the inductor box close to the cooling fan and the side away from the cooling fan, thereby generating a large temperature difference. Long-term temperature unevenness during operation will have an adverse effect on the service life and performance of the inductor box.

[0034] In view of the problems existing in the above-mentioned related technologies, the utility model provides an inductor box and an inverter.

[0035] Reference Figure 2An embodiment of the present invention provides an inductor box, comprising a box body 1 and heat dissipation fins 2, the heat dissipation fins 2 being arranged on the outer wall of the box body 1, and ventilation gaps 3 being provided between adjacent heat dissipation fins 2, the heat dissipation fins 2 comprising oblique fins 21 and straight fins 22, the oblique fins 21 being arranged on the outer top wall 11 of the box body 1, the straight fins 22 being arranged on the outer side wall 12 of the box body 1, the outer top wall 11 and the outer side wall 12 of the box body 1 intersecting to form a side edge 13, the projection of the extending direction of the oblique fins 21 intersecting with the straight line where the side edge 13 is located, the projection of the extending direction of the straight fins 22 being parallel to the straight line where the side edge 13 is located or intersecting with the straight line where the side edge 13 is located.

[0036] Specifically, for example, the box body 1 of the inductor box in this embodiment is a rectangular parallelepiped structure with comparable dimensions in the Y and Z directions, and a slightly larger dimension in the X direction, wherein the X direction can be regarded as the length direction of the box body 1. Among them, a plurality of oblique fins 21 are arranged on the outer top wall 11 of the box body 1 in parallel with each other and at intervals, and a plurality of straight fins 22 are arranged on the outer side wall 12 of the box body 1 in parallel and at intervals along the Z direction, and each straight fin 22 extends along the X direction respectively. The bottom wall edge of the box body 1 extends outward in the XY plane to form an outer edge to facilitate the assembly of the inductor box with other components. In the figure, the long side on the left side of the outer top wall 11 or the long side on the outer side wall 12 can be regarded as the side edge 13. The oblique fins 21 form an angle of 0°-90° with the side edge 13 of the box body 1.

[0037] When assembling the inverter, secure the inductor box with one end of the side edge 13 facing the cooling fan, and ensure that the ends of the ventilation gaps 3 of the straight fins 22 and the oblique fins 21 face the cooling fan. The arrangement of the oblique fins 21 intersecting the side edges 13 combined with the straight fins 22 ensures that the cooling air blown by the cooling fan enters each ventilation gap 3 as much and more evenly as possible.

[0038] Reference Figure 1 、 Figure 3 ,in, Figure 3 The solid line in the middle represents a simplified schematic diagram of the oblique fin 21 (subsequent Figure 4 、 Figure 6 、 Figure 7 The oblique fins 21 in FIG. 2 are all illustrated in this manner). Figure 3 The area marked with a small cross symbol represents the shaded area. Figure 1 and Figure 3 It can be clearly seen that, without changing the position of the cooling fan and the size of the wind, the range of the outer top wall 11 of the inductor box affected by the wind is significantly increased in this embodiment, thereby minimizing the problem of uneven heat dissipation caused by the offset of the cooling fan relative to the inductor box, making the inductor temperature of various parts of the inductor box more uniform.

[0039] The inductor box in this embodiment is provided with three inductors. After actual testing, the inductor box in this embodiment can control the maximum temperature difference of the inductor copper coil to within 5°C.

[0040] Optionally, the angle between the oblique fins 21 and the side edges 13 is preferably in the range of 30°-60°. This range allows for smoother airflow, further improving heat dissipation efficiency. Furthermore, during design and use, other components on the inductor box are appropriately positioned to avoid blocking the ventilation gap 3. In this embodiment, the angle between the oblique fins 21 and the side edges 13 is 30°.

[0041] Optionally, the straight fins 22 are parallel to the side edges 13, and the oblique fins 21 and the straight fins 22 are both fixed to the outer wall of the box body 1. Adjacent oblique fins 21 are parallel to each other and have equal spacing, and adjacent straight fins 22 are parallel to each other and have equal spacing. The equal flow channel design can further improve the uniformity of air circulation in various parts, thereby quickly achieving the purpose of uniform temperature.

[0042] Reference Figure 2 、 Figure 3 Optionally, the two ends of the straight fin 22 are a near-wind end 221 and a far-wind end 222 , and the height of the near-wind end 221 is less than the height of the far-wind end 222 .

[0043] Specifically, for the straight fin 22, its height direction is the Y direction. Figure 2 For example, along the X direction, the height of the straight fin 22 changes from large to small, and can be transformed into a step, or gradually into an arc, so that the windward end 221 is shorter than the windward end 222. Figure 1 Compared with the straight side fins 2b in the prior art, the profile of the variable-section straight fin 22 can minimize the shielding effect of the near-wind end 221 of the straight fin 22 on the far-wind end 222, making it easier for air to circulate.

[0044] Reference Figure 4 Another embodiment of the present invention provides an inductor box, which is different from the inductor boxes in other embodiments in that the oblique fins 21 include long wings 211 and short wings 212, the ends of the long wings 211 are flush with the edge of the outer top wall 11, and the ends of the short wings 212 are spaced apart from the edge of the outer top wall 11, and the long wings 211 and the short wings 212 are arranged alternately and at intervals.

[0045] Specifically, if Figure 4As shown, from left to right, the long wings 211 are first, followed by the short wings 212, and the two are arranged in sequence. Among them, the long wings 211 extend to the edge of the outer top wall 11. For example, the two ends of the first long wing 211 in the figure extend to the left edge and the lower edge of the outer top wall 11 respectively, or only one end extends to the left edge or the lower edge of the outer top wall 11. Correspondingly, the two ends of the short wings 212 are spaced apart from the left edge and the lower edge of the outer top wall 11, or one end can extend to the left edge or the lower edge. The alternating arrangement of the long wings 211 and the short wings 212 can allow air to circulate in two adjacent ventilation gaps 3, making the air flow path more complex, thereby extending the residence time of the cold air in the ventilation gap 3.

[0046] Reference Figure 5 、 Figure 6 Another embodiment of the present invention provides an inverter, including a housing 4 and the inductor box of the first embodiment.

[0047] The housing 4 is used to install the inductor box, the radiator 6 and the fan 7. The fan 7 is arranged toward the radiator 6. The inductor box is arranged on one side of the radiator 6 with its straight fins 22 facing the radiator 6.

[0048] Specifically, if Figure 5 As shown, the housing 4 is a thin-walled hollow structure with a rectangular shape, the length of which is equal in the X-direction and the Y-direction, and slightly smaller in the Z-direction. Among the six walls of the housing 4, the one located on the left side in the figure has an opening in the XY plane to facilitate the installation of internal components. At the same time, there is a cover plate 5 at the opening. The cover plate 5 covers the opening and, together with the housing 4, serves as a structural load-bearing member of the inverter. An air inlet is provided on the first side wall of the housing 4. The first side wall is located in the YZ plane in the figure, corresponding to the right side of the housing 4 from this perspective. The fan 7 is fixedly mounted on the first side wall of the housing 4 and is arranged in a one-to-one correspondence with the air inlet.

[0049] The beneficial effects of the inverter of this embodiment relative to the prior art are the same as those of the above-mentioned inductor box, and will not be described in detail here.

[0050] like Figure 6 As shown, the inner cavity of the shell 4 is a connected heat dissipation cavity 8. Reasonable arrangement of the positions of the inductor box, the radiator 6 and the fan 7 can make the air flow in the heat dissipation cavity 8 more uniform, thereby further improving the heat dissipation efficiency.

[0051] Optionally, the two inductor boxes are respectively located on both sides of the radiator 6 , and an air outlet 41 is provided on a second side wall of the housing 4 opposite to the first side wall.

[0052] It is worth noting that after assembly, the top, bottom, left, and right of the inverter are oriented differently from the inductor box described above. The outer top wall 11 of the inductor box refers to the XY plane, while in the inverter embodiment, the top wall of the housing 4 refers to the XZ plane. The Y direction in the figure is the direction of gravity.

[0053] Specifically, if Figure 6 As shown, the radiator 6 and the inductor box are positioned near the exhaust vent 41 of the housing 4, with the right side wall of the radiator 6 facing the fan 7. The X-direction represents the length of the radiator 6, and it is preferred that the length of the radiator 6 be the same as the length of the inductor box. The two inductor boxes are located above and below the radiator, respectively, and their cooling fins are symmetrically distributed about the centerline of the radiator 6, parallel to the X-axis. In the figure, the outer wall of the upper inductor box faces the top wall of the radiator 6; the outer wall of the lower inductor box faces the bottom wall of the radiator 6.

[0054] Compared to inverters with a single inductor box, the inverter in this embodiment boasts a higher level of integration and a more compact structure. In this embodiment, both the exhaust vent 41 and the fan 7 are located on the sidewalls of the housing 4, with the exhaust vent 41 facing the fan 7. This allows air to flow transversely, perpendicular to the direction of gravity. This side-inlet and side-outlet design effectively enhances the inverter's ability to withstand strong winds and sandstorms, reducing the risk of internal sand accumulation and fan 7 blades becoming stuck.

[0055] Optionally, a porous plate 9 for blocking the exhaust port 41 is further installed on the second side wall of the shell 4. The honeycomb-shaped porous plate 9 can further prevent sand and stones from entering the heat dissipation cavity 8 while ensuring air circulation.

[0056] Specifically, the aperture of the through holes can be changed or through holes of different apertures can be arranged in combination, and a suitable porous plate 9 can be selected according to the size of the sand and stone particles in the site environment.

[0057] like Figure 6 、 Figure 7 As shown, optionally, a plurality of fans 7 are provided between the two inductor boxes, a first air duct 81 is formed between the box body 1 of the inductor box and the radiator 6 , and at least one fan 7 is provided facing the first air duct 81 .

[0058] Specifically, in this embodiment, three fans 7 are provided at equal intervals along the Y circumference of the first sidewall of the housing 4. The top and bottom walls of the heat sink 6, combined with the outer sidewalls 12 of the upper and lower inductor boxes, form a first air duct 81. The fans 7 at the upper and lower ends are aligned with the upper and lower first air ducts 81, respectively. This allows the fans 7 to simultaneously act on the inductor box and the heat sink 6, significantly improving their efficiency.

[0059] Reference Figure 6 、 Figure 7 Optionally, a second air duct 82 is formed between the box body 1 of the inductor box and the inner top wall of the shell 4.

[0060] Specifically, Figure 7The middle dashed line indicates the direction of air flow. The first air duct 81 and the second air duct 82 are respectively located at the two ends of the oblique fin 21. Preferably, the first air duct 81, the ventilation gap 3 of the oblique fin 21, and the second air duct 82 are of equal width, and the first air duct 81 and the second air duct 82 are both parallel to the wind direction of the fan 7. Furthermore, it is preferred that the ventilation gap 3 between the heat dissipating fins 2 is consistent in width with the first air duct 81 and the second air duct 82. Consistent flow channel width means consistent resistance, so that the cold air generated by the fan 7 can pass through the heat dissipation cavity 8 at a uniform speed and be discharged from the exhaust port 41, thereby further achieving uniform heat dissipation.

[0061] Example 3: An inverter implements the following principles: fan 7 generates cool air horizontally directed toward the heat sink 6 and inductor box. The inclined fins 21 and stepped straight fins 22 ensure that even when fan 7 is offset, the airflow is evenly distributed across the inductor box. By properly arranging the exhaust vent 41, inductor box, fan 7, and heat sink 6, the side-inlet and side-outlet cooling method not only enhances air circulation within the heat sink 8 and achieves uniform heat dissipation, but also improves the inverter's adaptability in strong windy and sandy environments, reducing sand accumulation within the housing 4 and minimizing sand and stone obstruction to fan 7 operation.

[0062] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An inductor box, characterized in that: The invention comprises a box body (1) and heat dissipation fins (2), wherein the heat dissipation fins (2) are arranged on the outer wall of the box body (1), and ventilation gaps (3) are provided between adjacent heat dissipation fins (2), and the heat dissipation fins (2) comprise oblique fins (21) and straight fins (22), wherein the oblique fins (21) are arranged on the outer top wall (11) of the box body (1), and the straight fins (22) are arranged on the outer side wall (12) of the box body (1), and the outer top wall (11) and the outer side wall (12) of the box body (1) intersect to form a side edge (13), and the projection of the extending direction of the oblique fins (21) intersects with the straight line where the side edge (13) is located, and the projection of the extending direction of the straight fins (22) is parallel to the straight line where the side edge (13) is located or intersects with the straight line where the side edge (13) is located.

2. The inductor box according to claim 1, characterized in that: The oblique fins (21) include long wings (211) and short wings (212), the ends of the long wings (211) are flush with the edge of the outer top wall (11), and the ends of the short wings (212) are spaced apart from the edge of the outer top wall (11), and the long wings (211) and the short wings (212) are arranged alternately and at intervals.

3. The inductor box according to claim 1, characterized in that: The two ends of the straight fin (22) are respectively a near-wind end (221) and a far-wind end (222), and the height of the near-wind end (221) is smaller than the height of the far-wind end (222).

4. The inductor box according to claim 1, characterized in that: Adjacent heat dissipation fins (2) are parallel to each other and have equal spacing.

5. The inductor box according to claim 1, characterized in that: The angle between the oblique fin (21) and the side edge (13) ranges from 30° to 60°.

6. An inverter, characterized in that: The invention comprises a housing (4) and an inductor box according to any one of claims 1 to 5, wherein the housing (4) is used to install the inductor box, a radiator (6), and a fan (7), the fan (7) being arranged toward the radiator (6), and the inductor box being arranged on one side of the radiator (6) with its straight fins (22) facing the radiator (6).

7. The inverter according to claim 6, characterized in that: The two inductance boxes are respectively located on both sides of the radiator (6), the fan (7) is fixedly mounted on a first side wall of the housing (4), and an exhaust port (41) is provided on a second side wall of the housing (4) opposite to the first side wall.

8. The inverter according to claim 7, characterized in that: A plurality of fans (7) are arranged between the two inductor boxes, a first air duct (81) is formed between the box body (1) of the inductor box and the radiator (6), and at least one fan (7) is arranged facing the first air duct (81).

9. The inverter according to claim 8, characterized in that: A second air duct (82) is formed between the box body (1) of the inductance box and the inner top wall of the shell (4).

10. The inverter according to claim 7, characterized in that: A porous plate (9) is also provided on the second side wall, and the porous plate (9) is used to block the air outlet (41).

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