Photovoltaic inverter power inductor heat dissipation structure and power electronic equipment

Abstract

The utility model discloses a photovoltaic inverter power inductor heat dissipation structure and power electronic equipment, which comprises an inductor shell, n boost power inductors and n inversion power inductors, the inductor shell is provided with 2n independent inductor cavities, a gas diversion gap is arranged between the shells of two adjacent independent inductor cavities, and the gas diversion gap is communicated with the n boost power inductors and the n inversion power inductors. The photovoltaic inverter power inductor heat dissipation structure comprises 2n inductor cavities, the 2n inductor cavities are arranged in parallel, heat dissipation fins are arranged on the outer surfaces of the inductor cavities, and the boost power inductors and the inversion power inductors are arranged in the 2n inductor cavities in a staggered mode. The boost power inductor and the inverter power inductor are arranged in the cavity of the shell in a staggered mode, heat accumulation between the inductors is reduced, the inductor size is reduced, heat dissipation is optimized, and meanwhile cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of photovoltaic devices, in particular to a photovoltaic inverter power inductor heat dissipation structure and a power electronic device. Background Art

[0002] With the policy call for carbon peak and carbon neutrality, the new energy industry is booming, and the installed capacity of photovoltaic string inverters is increasing. At the same time, the industry competition for small string inverters is becoming more and more fierce. In order to cope with the fierce market competition, it is necessary to increase the power density of the inverter, reduce the size of the inverter, and reduce the cost of the system. The power inductor is one of the important components of the system, and its size and cost need to be reduced.

[0003] There are two existing inductor solutions. One is to make a single independent inductor. The advantage of this solution is good heat dissipation, but it is costly and large in size. Another solution is to integrate all inductors into one inductor component. The advantage of this solution is small size, but poor heat dissipation. In order to optimize heat dissipation, the cost of the inductor itself will increase. The third solution is to place the inductor in multiple independent cavities and combine them into one inductor component. Compared with the first two solutions, this solution has the advantages of more balanced size, cost, and heat dissipation. However, in order to ensure heat dissipation of each independent cavity, the gap between the cavities needs to be increased and the shell design is more complicated. Utility Model Content

[0004] The technical problem to be solved by the utility model is to propose a photovoltaic inverter power inductor heat dissipation structure. The photovoltaic inverter power inductor heat dissipation structure utilizes the characteristics of staggered heating of the boost power inductor and the inverter power inductor, and staggeredly places the boost power inductor and the inverter power inductor in a shell cavity, thereby reducing heat accumulation between the inductors, reducing the inductor size, optimizing heat dissipation, and reducing costs.

[0005] In order to solve the above technical problems, the utility model provides a photovoltaic inverter power inductor heat dissipation structure, including an inductor shell, n boost power inductors and n inverter power inductors, the inductor shell has 2n independent inductor cavities, a gas guide gap is opened between the shells of two adjacent independent cavities, heat dissipation fins are arranged on the outer surface of the inductor cavity, and the boost power inductors and inverter power inductors are staggered in the 2n inductor cavities, wherein n≥1.

[0006] Preferably, the inductor housing is integrally formed of metal or alloy.

[0007] Preferably, the size and shape of each of the independent inductor cavities are adapted to the corresponding boost power inductor and inverter power inductor.

[0008] Preferably, the boost power inductor and the inverter power inductor are arranged in an insulating mesh bag and then placed in a corresponding inductor cavity.

[0009] Preferably, a gap between the inductor cavity and the corresponding boost power inductor and inverter power inductor is filled with thermally conductive potting glue.

[0010] Preferably, the outer surface of the shell of each of the inductor cavities is provided with m longitudinal heat dissipation fins, the m heat dissipation fins extend toward the lower surface of the shell of the inductor cavity, and the m heat dissipation fins are uniformly arranged at equal intervals in the horizontal direction, wherein m≥1.

[0011] Preferably, n=3, the three boost power inductors are three independent inductor windings, the three inverter power inductors are three independent inductor windings, the inductor housing has six independent inductor cavities, and the three boost power inductors and the three inverter power inductors are interlaced and placed in the corresponding inductor cavities from left to right.

[0012] Preferably, the photovoltaic inverter power inductor heat dissipation structure is fixedly arranged on the main body box of the photovoltaic inverter.

[0013] In order to solve the above technical problems, the utility model also discloses a power electronic device, including the photovoltaic inverter power inductor heat dissipation structure described above.

[0014] After adopting the above device, the photovoltaic inverter power inductor heat dissipation structure includes an inductor shell, n boost power inductors and n inverter power inductors, the inductor shell has 2n independent inductor cavities, a gas guide gap is opened between the shells of two adjacent independent cavities, heat dissipation fins are arranged on the outer surface of the inductor shell, and the boost power inductors and inverter power inductors are staggered in the 2n inductor cavities; the photovoltaic inverter power inductor heat dissipation structure utilizes the staggered heating characteristics of the boost power inductor and the inverter power inductor, and staggeredly places the boost power inductor and the inverter power inductor in the shell cavity, thereby reducing heat accumulation between the inductors, reducing the inductor size, optimizing heat dissipation, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a photovoltaic inverter power inductor heat dissipation structure of the overall structure Figure 1 ;

[0016] Figure 2 The utility model is a photovoltaic inverter power inductor heat dissipation structure of the overall structure Figure 2 .

[0017] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Embodiment 1

[0020] See also Figure 1 and Figure 2 , Figure 1 The utility model is a photovoltaic inverter power inductor heat dissipation structure of the overall structure Figure 1 ; Figure 2 The utility model is a photovoltaic inverter power inductor heat dissipation structure of the overall structure Figure 2 .

[0021] The present embodiment discloses a photovoltaic inverter power inductor heat dissipation structure, including an inductor housing 2, n boost power inductors 31 and n inverter power inductors 41, the inductor housing 2 has 2n independent inductor cavities 21, 22, a gas guide gap 61 is provided between the housings of two adjacent independent inductor cavities, heat dissipation fins are provided on the outer surface of the inductor cavity, and the boost power inductors and inverter power inductors are alternately placed in the 2n inductor cavities, wherein n≥1. Embodiment 2

[0022] This embodiment is based on the first embodiment. In this embodiment, the inductor housing 2 is integrally formed of metal or alloy. Embodiment 3

[0023] This embodiment is based on the first embodiment. In this embodiment, the size and shape of each independent inductor cavity are adapted to the corresponding boost power inductor 31 and inverter power inductor 41, and the gap between the inductor cavity and the corresponding boost power inductor 31 or inverter power inductor 41 is filled with thermal conductive potting glue. Embodiment 4

[0024] This embodiment is based on the first embodiment. In this embodiment, the outer surface of the shell of each inductor cavity is provided with m longitudinal heat dissipation fins 51, the m heat dissipation fins 51 extend toward the lower surface of the shell of the inductor cavity, and the m heat dissipation fins 51 are uniformly arranged at equal intervals in the horizontal direction, wherein m≥1. Embodiment 5

[0025] This embodiment is based on the first embodiment. In this embodiment, n=3, the three boost power inductors 31 are three independent inductor windings, the three inverter power inductors 41 are three independent inductor windings, the inductor housing 2 has six independent inductor cavities 21, 22, and the three boost power inductors 31 and the three inverter power inductors 41 are interlaced and placed in the corresponding inductor cavities from left to right.

[0026] The boost power inductor 31 and the inverter power inductor 41 are disposed in an insulating mesh bag and then placed in corresponding inductor cavities.

[0027] The photovoltaic inverter power inductor assembly steps and methods in this embodiment are as follows: first, the boost power inductor and the inverter power inductor are placed in an insulating mesh bag, and then placed in the corresponding inductor cavities 21 and 22 in sequence, the boost power inductor corresponds to the inductor cavity 21, and the inverter power inductor corresponds to the inductor cavity 22, and then the potting glue is used to fill the gap between the inductor cavity and the boost power inductor and the inverter power inductor, and the potting glue is cured before the assembly is completed. Embodiment 6

[0028] This embodiment is based on the first embodiment. In this embodiment, the photovoltaic inverter power inductor heat dissipation structure is fixedly arranged on the main box of the photovoltaic inverter. Embodiment 7

[0029] This embodiment discloses a power electronic device, wherein the inverter includes the photovoltaic inverter power inductor heat dissipation structure described in any one of Embodiments 1 to 6.

[0030] The photovoltaic inverter power inductor heat dissipation structure utilizes the characteristics of staggered heating of the boost power inductor and the inverter power inductor, and staggeredly places the boost power inductor and the inverter power inductor in a shell cavity, thereby reducing heat accumulation between the inductors, reducing the inductor size, optimizing heat dissipation, and reducing costs.

[0031] The preferred embodiments of the present application are described above with reference to the accompanying drawings, but the scope of the present application is not limited thereby. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present application shall be within the scope of the present application.

Claims

1. A photovoltaic inverter power inductor heat dissipation structure, characterized in that: It comprises an inductor shell, n boost power inductors and n inverter power inductors, wherein the inductor shell has 2n independent inductor cavities, a gas conduction gap is provided between the shells of two adjacent independent inductor cavities, heat dissipation fins are provided on the outer surface of the inductor cavity, and the boost power inductors and inverter power inductors are alternately placed in the 2n inductor cavities, wherein n≥1.

2. The photovoltaic inverter power inductor heat dissipation structure according to claim 1, characterized in that: The inductor housing is integrally formed of metal or alloy.

3. The photovoltaic inverter power inductor heat dissipation structure according to claim 1, characterized in that: The size and shape of each of the independent inductor cavities are adapted to the corresponding boost power inductor and inverter power inductor.

4. The photovoltaic inverter power inductor heat dissipation structure according to claim 1, characterized in that: The boost power inductor and the inverter power inductor are arranged in an insulating mesh bag and then placed in a corresponding inductor cavity.

5. The photovoltaic inverter power inductor heat dissipation structure according to claim 1, characterized in that: The gap between the inductor cavity and the corresponding boost power inductor and inverter power inductor is filled with heat-conducting potting glue.

6. The photovoltaic inverter power inductor heat dissipation structure according to claim 1, characterized in that: The outer surface of the shell of each inductor cavity is provided with m longitudinal heat dissipation fins, the m heat dissipation fins extend toward the lower surface of the shell of the inductor cavity, and the m heat dissipation fins are uniformly arranged at equal intervals in the horizontal direction, wherein m≥1.

7. The photovoltaic inverter power inductor heat dissipation structure according to claim 1, characterized in that: n=3, the three boost power inductors are three independent inductor windings, the three inverter power inductors are three independent inductor windings, the inductor housing has six independent inductor cavities, and the three boost power inductors and the three inverter power inductors are interlaced and placed in the corresponding inductor cavities from left to right.

8. The photovoltaic inverter power inductor heat dissipation structure according to claim 1, characterized in that: The photovoltaic inverter power inductor heat dissipation structure is fixedly arranged on the main box of the photovoltaic inverter.

9. A power electronic device, characterized in that: It comprises the photovoltaic inverter power inductor heat dissipation structure as described in any one of claims 1 to 8.

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