An inverter and a power generation system

Abstract

The utility model discloses an inverter and power generation system, including inverter box, inverter subassembly and heat abstractor, inverter box is provided with inverter cavity, inverter subassembly sets up in inverter cavity, inverter subassembly includes power ware and circuit board, power ware sets up in circuit board, and power ware is attached to the inner surface of the bottom shell of inverter box, heat abstractor sets up in the outer surface of the bottom shell of inverter box, heat abstractor includes a plurality of first radiating fins and a plurality of second radiating fins, a plurality of first radiating fins interval arrangement, a plurality of first radiating fins and a plurality of second radiating fins are alternately arranged, first radiating fin is aligned with circuit board, second radiating fin is aligned with power ware, and the length of first radiating fin is greater than the length of second radiating fin. Through the above mode, the utility model discloses inverter's local heat dissipation capacity can be improved, and then inverter's overall heat dissipation efficiency is improved, and the work efficiency stability when maintaining inverter works.

Description

Technical Field

[0001] This utility model relates to the field of power conversion technology, and in particular to an inverter and a power generation system. Background Technology

[0002] Inverters are one of the important system balancers in new energy power generation systems. Inverters can convert the variable DC voltage generated by the power generation device into AC power at the mains frequency, and then feed it back to the commercial power transmission system or supply it to the off-grid power grid. Whether the inverter's temperature is stable during operation is a key factor affecting the inverter's efficiency.

[0003] In the process of realizing this utility model, the applicant discovered that conventional inverters usually have multiple heat dissipation fins of equal length on their housing. These fins are evenly distributed and cover the entire housing, achieving equivalent heat dissipation for the entire housing. However, the inverter's heat generation is mainly generated by the power transistors, and the heat generation area is concentrated. The entire housing is not effectively cooled, resulting in wasted heat dissipation. Utility Model Content

[0004] The main technical problem solved by this utility model embodiment is to provide an inverter and a power generation system that can optimize heat dissipation for the main heat source of the inverter and improve the overall heat dissipation efficiency.

[0005] To solve the above-mentioned technical problems, the present invention provides an inverter, including an inverter box, an inverter assembly, and a heat dissipation assembly. The inverter box has an inverter cavity, and the inverter assembly is disposed in the inverter cavity. The inverter assembly includes a power unit and a circuit board. The power unit is disposed on the circuit board and attached to the inner surface of the bottom shell of the inverter box. The heat dissipation assembly is disposed on the outer surface of the bottom shell of the inverter box. The heat dissipation assembly includes a plurality of first heat sinks and a plurality of second heat sinks. The plurality of first heat sinks are spaced apart along a first direction, and the plurality of first heat sinks and the plurality of second heat sinks are alternately arranged. Along the direction from the outer surface of the bottom shell to the inner surface of the bottom shell, the first heat sinks are aligned with the circuit board, and the second heat sinks are aligned with the power unit. Along a second direction, the length of the first heat sink is greater than the length of the second heat sink, and the first direction is perpendicular to the second direction.

[0006] Optionally, the second heat sink is tapered, and the area of ​​the end face of the second heat sink connected to the bottom shell is greater than the area of ​​the end face of the second heat sink away from the bottom shell.

[0007] Optionally, the first heat sink is tapered, and the area of ​​the end face of the first heat sink connected to the bottom shell is greater than the area of ​​the end face of the first heat sink away from the bottom shell.

[0008] Optionally, the inverter further includes a heat-conducting plate disposed between the power unit and the base.

[0009] Optionally, the circuit board is provided with a plurality of positioning holes, and the bottom shell is provided with a plurality of positioning posts, with one positioning post inserted into one of the positioning holes to fix the circuit board to the bottom shell.

[0010] Optionally, the inverter box is provided with a plurality of inductor compartments, which are spaced apart. The inverter assembly also includes a plurality of inductors, one of which is disposed in one of the inductor compartments. The inductor is connected to the circuit board. Along the direction from the outer surface of the bottom shell to the inner surface of the bottom shell, the first heat sink is aligned with the inductor.

[0011] Optionally, the depth of the inductor compartment is two-thirds of the length of the inductor along a third direction, and / or the distance between any of the inductor compartments and any of the power devices is greater than the length of the power device along a second direction, wherein the third direction is perpendicular to the first direction and the third direction is perpendicular to the second direction.

[0012] Optionally, the outer surface of the bottom shell is provided with a hanging ring, and the inverter also includes a wall mount, the wall mount is provided with a wall mount plate and a hook, the hook is connected to the wall mount plate, the wall mount plate is used to fix the object to be hung, and the hook is used to hang the hanging ring.

[0013] Optionally, the inverter box includes a bottom shell, a cover plate, and a sealing ring. The bottom shell is provided with a groove and an annular groove. The annular groove surrounds the opening of the groove. The sealing ring is disposed in the annular groove, and a portion of the sealing ring protrudes from the annular groove. The cover plate is detachably fixed to the bottom shell. The cover plate closes the opening of the groove to form the inverter cavity. The portion of the sealing ring protruding from the annular groove abuts against the cover plate.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is: to provide a power generation system, including a plurality of power generation components, a controller and the inverter mentioned above, wherein the plurality of power generation components are connected to the inverter and the controller is connected to the inverter.

[0015] The beneficial effects of this utility model embodiment are as follows: Unlike existing technologies, this utility model embodiment provides a photovoltaic inverter, including an inverter box, an inverter module, and a heat dissipation component. The inverter box has an inverter cavity, and the inverter module is disposed within the inverter cavity. The inverter module includes a power unit and a circuit board. The power unit is disposed on the circuit board and attached to the inner surface of the bottom shell of the inverter box. The heat dissipation component is disposed on the outer surface of the bottom shell of the inverter box. The heat dissipation component includes a plurality of first heat sinks and a plurality of second heat sinks. The plurality of first heat sinks are spaced apart along a first direction, and the plurality of first heat sinks and the plurality of second heat sinks are alternately arranged. Along the direction from the outer surface of the bottom shell to the inner surface of the bottom shell, the first heat sinks are aligned with the circuit board, and the second heat sinks are aligned with the power unit. Along a second direction, the length of the first heat sink is greater than the length of the second heat sink. The first direction is perpendicular to the second direction. By optimizing the inverter's heat dissipation system, based on the uniformly distributed first heat sinks, second heat sinks are precisely arranged for the main heat-generating components of the inverter, improving the local heat dissipation capacity of the inverter, thereby improving the heat dissipation efficiency of the inverter and maintaining the operational stability of the inverter. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is an overall structural diagram of the inverter provided in this embodiment of the utility model; Figure 2 This is an exploded view of the inverter provided in this embodiment of the utility model; Figure 3 This is a structural diagram of the bottom shell provided in an embodiment of the present utility model; Figure 4 This is a structural diagram of the inverter component provided in this embodiment of the utility model; Figure 5 This is a cross-sectional view of the bottom shell provided in an embodiment of the present utility model; Figure 6 The explosion of the bottom shell provided in this embodiment of the utility model Figure 1 ; Figure 7 The explosion of the bottom shell provided in this embodiment of the utility model Figure 2 ; Figure 8 yes Figure 6 A magnified view of part A in the middle.

[0018] Explanation of reference numerals in the attached figures: 100 inverter; 1 Inverter box, 11 Bottom shell, 110 Groove, 111 First side wall, 112 Second side wall, 113 Third side wall, 114 Fourth side wall, 115 Bottom wall, 116 Positioning post, 117 Hanging ring, 118 Annular flange, 119 Annular groove, 12 Cover plate, 13 Inverter cavity, 14 Inductor compartment, 15 Sealing ring; 2 Inverter assembly, 21 Power unit, 22 Circuit board, 221 Positioning hole, 23 Inductor; 3 heat dissipation components, 31 first heat sink, 32 second heat sink; 4 heat-conducting sheets; 5. Wall mount bracket; 51. Wall mount panel; 52. Hook; X is the first direction, Y is the second direction, and Z is the third direction. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0021] This utility model provides an embodiment of an inverter 100 that optimizes the heat dissipation layout of the inverter and improves heat dissipation efficiency.

[0022] To facilitate the reader's understanding of the concept of this utility model embodiment, the specific structure of the inverter 100 is described below: Please see Figure 1 and Figure 2 The inverter 100 includes an inverter box 1, an inverter component 2, and a heat dissipation component 3. The inverter box 1 is provided with an inverter cavity 13, the inverter component 2 is disposed in the inverter cavity 13, and the heat dissipation component 3 is disposed on the outer surface of the bottom shell 11 of the inverter box 1. The heat dissipation component 3 is used to dissipate the heat generated by the inverter component 2 when the inverter is working, so as to maintain the stability of the operating temperature of the inverter 100.

[0023] For inverter box 1 mentioned above, please refer to Figure 3 The inverter box is provided with a bottom shell 11 and a cover plate 12. The bottom shell 11 includes a first side wall 111, a second side wall 112, a third side wall 113, a fourth side wall 114 and a bottom wall 115. The first side wall 111, the second side wall 112, the third side wall 113 and the fourth side wall 114 are all provided on the bottom wall 115. The first side wall 111, the second side wall 112, the third side wall 113 and the fourth side wall 114 are connected end to end in sequence. The first side wall 111 and the third side wall 113 are arranged opposite each other, and the second side wall 112 and the fourth side wall 114 are arranged opposite each other. The first side wall 111, the second side wall 112, the third side wall 113, the fourth side wall 114 and the bottom wall 115 form a groove 110. The cover plate 12 is detachably fixed to the bottom shell 11 to close the groove 110 to form an inverter cavity 13.

[0024] For inverter component 2 mentioned above, please refer to Figure 4 The inverter assembly 2 includes a power unit 21 and a circuit board 22. The power unit 21 is disposed on the circuit board 22 and is attached to the inner surface of the bottom shell 11 of the inverter box 1, i.e., the bottom wall 115.

[0025] For the heat dissipation component 3 mentioned above, please refer to [the relevant documentation]. Figure 1 The heat dissipation assembly 3 includes a plurality of first heat sinks 31 and a plurality of second heat sinks 32. The plurality of first heat sinks 31 are spaced apart along the first direction X, and the plurality of second heat sinks 32 and the plurality of first heat sinks 31 are alternately arranged. In the second direction Y, the length of the first heat sink 31 is greater than the length of the second heat sink 32. Along the direction from the outer surface of the bottom shell 11 toward the inner surface, the first heat sink 31 is aligned with the circuit board 22. The first heat sink 31 provides uniform heat dissipation to the entire bottom wall 115. The second heat sink 32 is aligned with the power unit 21, and the power unit 21 generates the most heat in the entire inverter 1. The second heat sink 32 is used to enhance the heat dissipation at the position of the bottom wall 155 aligned with the power unit 21, thereby improving the heat dissipation effect of the power unit 21. The first direction X is perpendicular to the second direction Y.

[0026] In some embodiments, please refer to Figure 5 The first heat sink 31 and the second heat sink 32 are arranged in a conical shape. The end face area of ​​the first heat sink 31 connected to the bottom shell 11 is larger than the end face area of ​​the first heat sink 31 away from the bottom shell 11, and / or the end face area of ​​the second heat sink 32 connected to the bottom shell 11 is larger than the end face area away from the bottom shell 11. In this way, the heat dissipation area of ​​the end of the heat sink closer to the heat source is larger and the heat transfer efficiency is higher.

[0027] In some embodiments, please refer to Figure 3The inverter 100 also includes several heat-conducting plates 4, which are disposed between the power unit 21 and the bottom shell 11. The heat-conducting plates 4 with high thermal conductivity can transfer heat to the bottom shell 11 more quickly, thereby improving the heat transfer efficiency.

[0028] In some embodiments, please refer to Figure 3 and Figure 4 The circuit board 22 is provided with a number of positioning holes 221, and the bottom shell 11 is provided with a number of positioning posts 116. Each positioning post 116 corresponds to one positioning hole 221. The circuit board 22 is fixed to the bottom shell 11 by inserting the positioning post 116 into the positioning hole 221.

[0029] In some embodiments, please refer to Figure 6 The inverter assembly 2 also includes several cylindrical inductors 23, which are connected to the circuit board 22. Several inductor compartments 14 are arranged at the top along the second direction Y inside the inverter box 1. The inductor compartments 14 are spaced apart and connected to the bottom wall 115 and the first side wall 111. One inductor 23 is installed in one inductor compartment 14 and fixed with potting compound after installation. Along the outer surface of the bottom shell 11 towards the inner surface, the first heat sink 21 is aligned with the inductor 23. The heat generated by the inductor 23 can be dissipated simultaneously through the heat sink on the bottom shell 11 and the side wall. The depth of the inductor compartment 14 is two-thirds of the diameter of the circular cross-section of the inductor 23, allowing the interface of the inductor 23 to be exposed outside the inductor compartment 14. The distance between any inductor compartment 14 and any power device 21 is greater than the length of the power device 21 in the second direction Y. By setting the intervals between inductors 23 and between inductors 23 and power devices 21, the thermal interaction between the main heat-generating components of the inverter 100 can be effectively reduced, preventing the heat accumulation rate from exceeding the heat conduction rate, thereby affecting the temperature stability of the inverter 100.

[0030] In some embodiments, please refer to Figure 7 The inverter 100 also includes a wall mount 5, which is fixed to the object to be hung, such as the casing, wall, etc. The wall mount 5 can be detachably fixed to the bottom shell 11 of the inverter 100, thereby enabling the inverter 100 to be hung on the object.

[0031] Specifically, the wall mount 5 includes a wall mount plate 51 and a hook 52. The hook 52 is connected to the wall mount plate 51. The wall mount plate 51 can be used to fix the object to be hung. The outer surface of the bottom shell 11 is provided with a hanging ring 117. The hanging ring 117 is composed of two symmetrically arranged first heat sinks 31 connected together. When the inverter is installed vertically, the hanging ring 117 can be sleeved on the hook 52 under the action of gravity.

[0032] In some embodiments, please refer to Figure 6 and Figure 8The bottom shell 11 is also provided with an annular flange 118 and an annular groove 119. The annular flange 118 is arranged around the opening of the groove 110, and the annular groove 119 is arranged around the opening of the groove 110 and around the annular flange 118. The inverter box 1 also includes a sealing ring 15. The sealing ring 15 is arranged in the annular groove 119 and partially protrudes from the annular groove 119. When the cover plate 12 is fixed to the bottom shell 11, the part of the sealing ring 15 protruding from the annular groove 119 abuts against the cover plate 12, so that the inverter cavity 13 forms a sealed space. With the above structure, when the inverter 100 is set outdoors, it can effectively prevent rainwater from entering the inverter cavity 13.

[0033] In this embodiment of the present invention, the inverter 100 includes an inverter box 1, an inverter assembly 2, and a heat dissipation assembly 3. The inverter box 1 is provided with an inverter cavity 13, and the inverter assembly 2 is disposed in the inverter cavity 13. The inverter assembly 2 includes a power unit 21 and a circuit board 22. The power unit 21 is disposed on the circuit board 22 and is attached to the inner surface of the bottom shell 11 of the inverter box 1. The heat dissipation assembly 3 is disposed on the outer surface of the bottom shell 11 of the inverter box 1. The heat dissipation assembly 3 includes a plurality of first heat dissipation fins 31 and a plurality of second heat dissipation fins 32. The plurality of first heat dissipation fins 31 are spaced apart and the plurality of first heat dissipation fins 31 and the plurality of second heat dissipation fins 32 are alternately arranged. The first heat dissipation fins 31 are aligned with the circuit board 22, and the second heat dissipation fins 32 are aligned with the power unit 21. The length of the first heat dissipation fins 31 is greater than the length of the second heat dissipation fins 32. By optimizing the layout of the heat dissipation components of the inverter 100, and on the basis of the first heat sink 31 which is evenly distributed, the second heat sink 32 is precisely arranged for the main heat-generating components of the inverter 100, thereby improving the local heat dissipation capacity of the inverter 100, thereby improving the heat dissipation efficiency of the inverter 100 and maintaining the working efficiency stability of the inverter 100 during operation.

[0034] This utility model provides an embodiment of a power generation system, which includes several power generation components, a controller, and the inverter 100 described above. The power generation components are connected to the inverter 100, and the controller is connected to the inverter 100. For the structure and function of the inverter 100, please refer to the above embodiment, which will not be repeated here.

[0035] Among them, power generation components can be solar panels, wind power generation components, tidal power generation components, etc.

[0036] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An inverter, characterized in that, include: Inverter box, equipped with an inverter cavity; An inverter assembly is disposed in the inverter cavity. The inverter assembly includes a power unit and a circuit board. The power unit is disposed on the circuit board and is attached to the inner surface of the bottom shell of the inverter box. A heat dissipation assembly is disposed on the outer surface of the bottom shell of the inverter box. The heat dissipation assembly includes a plurality of first heat dissipation fins and a plurality of second heat dissipation fins. The plurality of first heat dissipation fins are spaced apart along a first direction. The plurality of first heat dissipation fins and the plurality of second heat dissipation fins are alternately arranged. Along the direction from the outer surface of the bottom shell to the inner surface of the bottom shell, the first heat dissipation fins are aligned with the circuit board, and the second heat dissipation fins are aligned with the power unit. Along a second direction, the length of the first heat dissipation fins is greater than the length of the second heat dissipation fins. The first direction is perpendicular to the second direction.

2. The inverter according to claim 1, characterized in that, The second heat sink is tapered, and the area of ​​the end face of the second heat sink connected to the bottom shell is greater than the area of ​​the end face of the second heat sink away from the bottom shell.

3. The inverter according to claim 1, characterized in that, The first heat sink is tapered, and the area of ​​the end face of the first heat sink connected to the bottom shell is greater than the area of ​​the end face of the first heat sink away from the bottom shell.

4. The inverter according to claim 1, characterized in that, The inverter also includes a heat-conducting plate, which is placed between the power unit and the bottom case.

5. The inverter according to claim 1, characterized in that, The circuit board is provided with a plurality of positioning holes, and the bottom shell is provided with a plurality of positioning posts. One of the positioning posts is inserted into one of the positioning holes so that the circuit board is fixed to the bottom shell.

6. The inverter according to claim 1, characterized in that, The inverter box is provided with several inductor compartments, which are spaced apart. The inverter assembly also includes several inductors, one of which is disposed in one of the inductor compartments and is connected to the circuit board. Along the direction from the outer surface of the bottom shell to the inner surface of the bottom shell, the first heat sink is aligned with the inductor.

7. The inverter according to claim 6, characterized in that, The depth of the inductor compartment is two-thirds of the length of the inductor along the third direction, and / or the distance between any of the inductor compartments and any of the power devices is greater than the length of the power device along the second direction. Wherein, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

8. The inverter according to any one of claims 1-7, characterized in that, The outer surface of the bottom shell is provided with a hanging ring; The inverter also includes a wall mount, which is provided with a wall mount plate and a hook. The hook is connected to the wall mount plate, the wall mount plate is used to fix the object to be hung, and the hook is used to hang the hanging ring.

9. The inverter according to any one of claims 1-7, characterized in that, The inverter box includes a bottom shell, a cover plate, and a sealing ring. The bottom shell is provided with a groove and an annular groove. The annular groove surrounds the opening of the groove. The sealing ring is disposed in the annular groove, and a portion of the sealing ring protrudes from the annular groove. The cover plate is detachably fixed to the bottom shell. The cover plate closes the opening of the groove to form the inverter cavity. The portion of the sealing ring protruding from the annular groove abuts against the cover plate.

10. A power generation system, characterized in that, It includes a plurality of power generation components, a controller, and an inverter as described in any one of claims 1-9, wherein the plurality of power generation components are connected to the inverter, and the controller is connected to the inverter.

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