Heat dissipation integrated inductor box and inverter

Abstract

The utility model provides a heat dissipation integrated inductance box and an inverter, and relates to the technical field of power electronic inverters, and the interior of a box body is used for accommodating at least two inductance coil groups; the outer surface of the bottom surface of the box body is provided with radiating fins, the radiating fins extend in the length direction of the box body, the radiating fins are not completely straight, each radiating fin comprises a bent turning part and a linear part, the linear parts are parallel fins, the bent turning parts are in butt joint with the linear parts, the bent turning parts are arranged at one end close to the fan, and the bent turning parts are in butt joint with the linear parts. One end of the bending direction-changing part faces the fan, the other end of the bending direction-changing part faces the linear part, the fan is not right opposite to the linear part, and by arranging the bending direction-changing part, air flow of the fan is guided to the linear part, so that more heat dissipation air flow flows through the bending direction-changing part and the linear part, and a better heat dissipation and cooling effect is achieved. According to the inductor box, only one part of the structure of the fins is changed to form the bending turning part, and the heat dissipation efficiency of the inductor box is improved under the condition that the occupied space is as small as possible.

Description

Technical Field

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

[0002] With the increasing global energy shortage and environmental pollution, clean and renewable energy has become a key development area internationally. In this context, photovoltaic power generation technology has attracted much attention due to its advantages such as green, environmentally friendly and renewable. In photovoltaic power generation technology, the inverter is a key component that converts the DC power of photovoltaic modules into AC power, and its performance and design are crucial.

[0003] At the same time, with the rapid development of the power electronics industry, the size of photovoltaic inverters has continued to decrease, and the power density of equipment has gradually increased. During the operation of the equipment, the heat source is mainly concentrated in the local area of ​​the chassis, which directly affects the overall heat dissipation performance of the equipment.

[0004] Among them, the inductor is an important component of the photovoltaic inverter and is also the main source of heat. The inductor is usually placed in an inductor box, which is responsible for placing the inductor, helping the inductor to dissipate heat, and enabling the inductor to work normally. In order to increase the dust and water resistance of the inverter's inductor box, the inductor will be sealed with glue. Although this method has a good sealing effect, the heat in the inductor box is difficult to dissipate, which can easily cause the inductor to overheat and be damaged.

[0005] In the prior art, there are two main ways to configure the inductor box. One is an independent inductor box, that is, an inductor box only contains one inductor. This method has a better heat dissipation effect, but the overall space occupied is larger and the cost is relatively high. The other is an integrated inductor box, that is, multiple power inductors are placed in one inductor box. In this way, the overall size of the inductor box is smaller and the cost is relatively low, but the heat between the power inductors will affect each other, and the heat dissipation tooth design of the inductor box is relatively simple, usually arranged in a straight line, and the heat dissipation effect is poor.

[0006] For those skilled in the art, how to improve the heat dissipation efficiency of the inductor box while occupying as little space as possible is a technical problem that needs to be solved at present. Utility Model Content

[0007] The utility model provides a heat dissipation integrated inductor box, the heat dissipation fin includes a straight portion and a bending and redirecting portion, more airflow is guided to the straight portion through the bending and redirecting portion, the heat dissipation efficiency of the entire heat dissipation fin is improved, and the volume of the entire inductor box does not need to be enlarged. The specific scheme is as follows:

[0008] A heat dissipation integrated inductor box comprises a box body, the interior of which is used to accommodate at least two groups of inductor coil groups; heat dissipation fins are arranged on the outer surface of the bottom surface of the box body, and the heat dissipation fins extend along the length direction of the box body. The heat dissipation fins include a bending and changing portion and a straight portion, and the bending and changing portion is arranged at one end close to a fan, one end of the bending and changing portion faces the fan, and the other end faces the straight portion, and the bending and changing portion is used to guide the airflow of the fan to the straight portion.

[0009] Optionally, the straight portion includes a plurality of independent segments, and a spacing space is provided between two adjacent segments.

[0010] Optionally, the intervals between the segments of the straight portion are located at the junction of two groups of the inductor coil groups.

[0011] Optionally, the heat dissipation fins include longitudinal baffles, which are continuous and uninterrupted plates used to block lateral outflow of airflow.

[0012] Optionally, a first profiling bump is protruded from the inner surface of the bottom surface of the box body, and the shape of the first profiling bump matches the shape of the inductor coil group, forming a consistent gap size with two coils of a group of the inductor coil group;

[0013] A first profiling groove is arranged on the outer surface of the bottom surface of the box body, and the first profiling groove is formed to match the first profiling protrusion, so that the bottom surface of the box body forms a consistent thickness at the first profiling protrusion.

[0014] Optionally, a second profiling protrusion is protruded on the inner surface of the bottom surface of the box body, and the shape of the second profiling protrusion is adapted to the shape of the inductor coil group, forming a consistent gap size with two adjacent groups of the inductor coil groups;

[0015] The outer surface of the bottom surface of the box body is provided with a second profiling groove, and the second profiling groove is formed to match the second profiling protrusion, so that the bottom surface of the box body forms a consistent thickness at the second profiling protrusion.

[0016] Optionally, the length of the first contoured protrusion disposed on the bottom surface of the box body is smaller than the length of the second contoured protrusion disposed on the bottom surface of the box body.

[0017] Optionally, a partition is provided in the inner cavity of the box body, and the partition is used to separate the inner cavity of the box body into different chambers, each chamber can accommodate at least one group of the inductor coil groups; the partition is used to conduct heat to the bottom and side surfaces.

[0018] Optionally, a spacer plate is respectively arranged between two adjacent groups of the inductor coil groups.

[0019] Optionally, two opposite side walls of the box body are provided with spacer bumps protruding inwardly, and the spacer bumps are provided between two adjacent inductor coil groups.

[0020] The utility model also provides an inverter, comprising any one of the above-mentioned integrated heat dissipation inductor boxes, wherein the box body is arranged on the outer side of the bottom surface of the inverter chassis; a fan is arranged on the bottom surface of the inverter chassis, and the axis of the fan is parallel to the length direction of the box body and is not colinear.

[0021] The utility model provides a heat dissipation integrated inductor box, the interior of the box body is used to accommodate at least two groups of inductor coil groups; the outer surface of the bottom surface of the box body is provided with heat dissipation fins, the heat dissipation fins extend along the length direction of the box body, the heat dissipation fins are not completely straight, the heat dissipation fins include a bending and redirecting portion and a straight portion, the straight portion is a fin parallel to each other, the bending and redirecting portion is butted to the straight portion, the bending and redirecting portion is arranged at one end close to the fan, one end of the bending and redirecting portion faces the fan, and the other end faces the straight portion, the fan is not directly facing the straight portion, by arranging the bending and redirecting portion, the airflow of the fan is guided to the straight portion, so that more heat dissipation airflow flows through the bending and redirecting portion and the straight portion, thereby exerting a better heat dissipation and cooling effect. The utility model only changes a part of the structure of the fin to form the bending and redirecting portion, and improves the heat dissipation efficiency of the inductor box under the condition of occupying as little space as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the installation and use status of the heat dissipation integrated inductor box provided by the utility model;

[0024] Figure 2 This is a schematic diagram of an axonometric view of one side of the interior of a specific embodiment of the heat dissipation integrated inductor box provided by the utility model;

[0025] Figure 3 It is a schematic diagram of an axonometric view of the inner side of a specific embodiment of a box body;

[0026] Figure 4 It is a schematic isometric diagram of the outer side of a specific embodiment of the box body.

[0027] The figure includes:

[0028] Box body 1, first profiling protrusion 11, first profiling groove 111, heat dissipation fin 12, bending and redirecting portion 121, straight portion 122, longitudinal blocking piece 123, spacer plate 13, second profiling protrusion 14, second profiling groove 141, spacer protrusion 15, inductor coil assembly 2, fan 3. DETAILED DESCRIPTION

[0029] The core of the utility model is to provide an integrated heat dissipation inductor box, in which the heat dissipation fins include a straight portion and a bending and redirecting portion. More airflow is guided to the straight portion through the bending and redirecting portion, thereby improving the heat dissipation efficiency of the entire heat dissipation fins without expanding the volume of the entire inductor box.

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the heat dissipation integrated inductor box of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Combination Figure 1 , Figure 2 As shown, the utility model provides an integrated heat dissipation inductor box, including a box body 1, the box body 1 has a receiving cavity, and the cavity can accommodate an inductor coil group 2, and the interior of the box body 1 is used to accommodate at least two inductor coil groups 2, and the two or more inductor coil groups 2 are installed in the box body 1. Each inductor coil group 2 includes two coils. The box body 1 is provided with an open surface without a solid structure, which is used for assembly with the inverter chassis, that is, the box body 1 is fixed on the inverter chassis so that the inductor coil group 2 is in a closed space. Combined with Figure 1 As shown, the fan 3 is used to generate cooling airflow when it is working. Figure 1 Other components are installed in the blank area on the inverter chassis shown. The fan 3 mainly blows air to the other components installed in the blank area. Therefore, the fan 3 does not face the heat dissipation fins 12 directly, and part of the airflow on the side of the fan 3 flows to the heat dissipation fins 12.

[0032] Combination Figure 1 As shown, the outer surface of the bottom surface of the box body 1 is provided with heat dissipation fins 12, which are a plurality of plate-shaped heat dissipation structures arranged side by side, and are mainly used to increase the heat dissipation area of ​​the box body 1, so that the heat transferred by the box body 1 is dissipated outward more quickly. There are spacings between the plates of the heat dissipation fins 12, forming channels for airflow to pass through.

[0033] The heat dissipation fins 12 extend along the length direction of the box body 1. The airflow is guided by the heat dissipation fins 12 so as to extend substantially along the length direction of the box body 1. The flow direction of the airflow is as follows: Figure 1As shown by the arrow in the figure, it generally flows from left to right. The heat dissipation fin 12 provided by the utility model is not a completely straight structure. The heat dissipation fin 12 includes a bending and redirecting portion 121 and a straight portion 122, and the bending and redirecting portion 121 and the straight portion 122 are butted against each other. The bending and redirecting portion 121 is arranged at one end close to the fan 3, one end of the bending and redirecting portion 121 faces the fan 3, and the other end faces the straight portion 122. Since one end of the bending and redirecting portion 121 faces the fan 3, the bending and redirecting portion 121 can receive more airflow formed by the fan 3. The bending and redirecting portion 121 is used to guide the airflow of the fan 3 to the straight portion 122, that is, a part of the airflow generated by the fan 3 flows to one end of the bending and redirecting portion 121, and changes the flow direction along the bending and redirecting portion 121, so that the airflow changes the flow direction smoothly, and finally flows to the straight portion 122, and heat exchange occurs when flowing through the bending and redirecting portion 121 and the straight portion 122.

[0034] The plate structure constituting the bending and redirecting portion 121 may be entirely made of arc-shaped curved plates, or may be a combination of a portion of flat plates and a portion of arc-shaped curved plates, wherein the plates may be flat plates forming a bending structure with several obtuse angles. The direction in which the bending and redirecting portion 121 receives the airflow and the direction in which the airflow is discharged are not the same. The bending and redirecting portion 121 receives the airflow at one end facing the fan 3 and discharges the airflow at the end close to the straight portion 122, so that more airflow can be received. When the airflow passes through the bending and redirecting portion 121, the direction gradually changes, and the airflow is guided more toward the straight portion 122, so that the airflow can be cooled and dissipated more, and a better heat dissipation effect can be achieved. Compared with the traditional straight fin structure, only a part of the fin structure is changed to form the bending and redirecting portion 121, which improves the heat dissipation efficiency of the inductor box while occupying as little additional space as possible.

[0035] On the basis of the above solution, the straight portion 122 provided by the present invention includes a plurality of independent segments, and a spacing space is provided between two adjacent segments. Figure 1 As shown, the straight portion 122 is not of a continuous and uninterrupted design, but has several discontinuous positions in the length direction in which it extends. Since there is airflow between the plates of the straight portion 122, the air pressure is reduced, and the outside air can be supplemented through these discontinuous positions to increase the cooling air flow. The length of each continuous section of the straight portion 122 needs to be set according to the specific situation. In addition, an interval space can also be set between the straight portion 122 and the bending and turning portion 121. The plates of the bending and turning portion 121 remain intact to prevent the airflow from overflowing prematurely. Providing an interval space in the straight portion 122 is a preferred solution, but it does not mean that a continuous and uninterrupted structure cannot be set. These structures should also be included in the protection scope of the present utility model.

[0036] Specifically, the intervals between the segments of the straight portion 122 are located at the junction of the two groups of inductor coil groups 2. When working, the inductor coil group 2 mainly generates heat. In order to form a larger heat dissipation area and ensure that the heat is fully dissipated, a complete plate structure needs to be arranged at the position directly opposite the inductor coil group 2, and an interval is arranged at the junction of the two groups of inductor coil groups 2 for airflow to pass through. The bending and redirecting portion 121 occupies the bottom surface area corresponding to one group of inductor coil groups 2.

[0037] Combination Figure 1 , Figure 4 As shown, the heat dissipation fin 12 includes a longitudinal baffle 123, which is a continuous plate for blocking the lateral outflow of airflow. The longitudinal baffle 123 is located at the edge of the entire heat dissipation fin 12 to prevent the heat dissipation airflow from radiating outside the inverter chassis, ensuring that the airflow fully achieves heat dissipation.

[0038] Combination Figure 3 As shown, the inner surface of the bottom surface of the box body 1 is protruded with a first profiling protrusion 11, the shape of the first profiling protrusion 11 is adapted to the shape of the two coils of the inductor coil group 2, and the first profiling protrusion 11 and the two coils of a group of inductor coil groups 2 form a consistent gap size to fill the excess space between the two coils. The box body 1, the first profiling protrusion 11, and the heat dissipation fins 12 are made of the same thermal conductive material. The first profiling protrusion 11 is provided to increase the heat exchange area between the two coils of the inductor coil group 2 and improve the efficiency of heat dissipation.

[0039] Combination Figure 4 A first profiling groove 111 is provided on the outer surface of the bottom surface of the box body 1, and the first profiling groove 111 is matched with the first profiling protrusion 11 to form a depression toward the inner cavity, and the first profiling protrusion 11 forms a protrusion toward the inner cavity, and the sizes of the two are matched, so that the bottom surface of the box body 1 forms a consistent thickness at the first profiling protrusion 11, and the thickness of the bottom surface of the entire box body 1 at each position remains approximately the same. The plate of the heat dissipation fin 12 extends into the first profiling groove 111, and the heat dissipation fin 12 is closer to the heat source of the coil.

[0040] Combination Figure 3 As shown, the inner surface of the bottom surface of the box body 1 is protruded with a second profiling protrusion 14, the shape of the second profiling protrusion 14 is adapted to the shape of the inductor coil group 2, and forms a consistent gap size with two adjacent inductor coil groups 2; the second profiling protrusion 14 is located between two adjacent inductor coil groups 2, and the first profiling protrusion 11 is located between two coils in one inductor coil group 2. The first profiling protrusion 11 and the second profiling protrusion 14 respectively have two cylindrical surfaces, forming concentric circles with the outer shape of the coil.

[0041] A second profiling groove 141 is provided on the outer surface of the bottom surface of the box body 1, and the second profiling groove 141 is formed to match the second profiling protrusion 14. The second profiling groove 141 forms a depression toward the inner cavity, and the second profiling protrusion 14 forms a protrusion toward the inner cavity, and the sizes of the two are matched, so that the bottom surface of the box body 1 forms a consistent thickness at the second profiling protrusion 14, which can reduce the use of materials.

[0042] The length of the first profiling protrusion 11 provided on the bottom surface of the box body 1 is less than the length of the second profiling protrusion 14 provided on the bottom surface of the box body 1. Figure 3 As shown, d represents the length of the first profiling protrusion 11, D represents the length of the second profiling protrusion 14, and d<D. The length of the second profiling protrusion 14 is roughly equivalent to the width of the entire box body 1.

[0043] Based on any of the above technical solutions and their combination, the utility model sets a partition plate 13 in the inner cavity of the box body 1, combined with Figure 3 As shown, the partition plate 13 is used to divide the inner cavity of the box body 1 into different chambers, and each chamber can accommodate at least one group of inductor coil groups 2, that is, a partition plate 13 can be set between every two adjacent groups of inductor coil groups 2, or a smaller number of partition plates 13 can be set. The partition plate 13 is laterally connected to the two side walls of the inner cavity of the box body 1, and the bottom surface is fixed to the bottom surface of the box body 1. The partition plate 13 is used to conduct heat to the bottom surface and the side surface to improve the efficiency of heat conduction.

[0044] The most preferred situation is still to respectively arrange a spacer plate 13 between two adjacent groups of inductor coil groups 2, so that the heat dissipation efficiency is improved by a larger number of spacer plates 13.

[0045] Combination Figure 3 As shown, two opposite side walls of the box body 1 are protruded inwardly to form a spacing protrusion 15, and the spacing protrusion 15 is arranged between two adjacent inductor coil groups 2. The inductor coil group 2 can be positioned by arranging the spacing protrusion 15.

[0046] The utility model provides heat dissipation fins 12 at the bottom of the box body 1, and each plate is arranged at an equal interval, wherein the straight portion 122 is a straight rib type, and through calculation and simulation, the design parameters achieve the optimal rib efficiency; and is provided with a bending and redirecting portion 121 designed to cooperate with the fan 3, and the bending and redirecting portion 121 has a better drainage effect, which guides the airflow of the fan 3, so that a larger amount of air is blown into the heat dissipation fins on the inductor box, which can increase the fluid-solid contact area, improve the local convection heat transfer coefficient, and enhance the convection heat transfer capacity.

[0047] The utility model relies on the cooperation of the cooling fan on the inductor box and the inverter, and guides the airflow of the cooling fan by adding a helical radiator with a 60-degree or other suitable angle, so that a larger amount of air is blown into the cooling fins on the inductor box, which can increase the fluid-solid contact area and take away more heat. At the same time, a spacer 13 made of the same material as the inductor box is added between every two groups of inductor coil groups 2, which can enhance the intensity of heat radiation and heat conduction. A concentric protrusion first contoured bump 11 that fits the contour of the inductor coil is designed in each cavity of the box body 1 to enhance the radiation heat transfer intensity between the inductor and the shell and achieve better heat dissipation performance. The structure of the inductor box radiator is relatively simple and can be coordinated with the original installation structure. The processing and installation are simple and convenient, and will not increase much cost.

[0048] The utility model also provides an inverter, including the above-mentioned heat dissipation integrated inductor box, wherein the box body 1 is arranged on the outside of the bottom surface of the inverter chassis; the bottom surface of the inverter chassis is also provided with a fan 3, such as Figure 1 As shown, two fans 3 are provided, and the number of fans 3 is not limited to the case shown in the figure. The axis of the fan 3 is parallel to the length direction of the box body 1, and the axis of the fan 3 and the length direction of the box body 1 are not colinear, forming a staggered arrangement, which causes the airflow formed by the fan 3 not to face the box body 1, but the airflow generated by the fan 3 can flow to the straight part 122 through the bending and redirecting part 121. The inverter uses the above-mentioned heat dissipation integrated inductor box, which helps to improve the overall heat dissipation efficiency.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat dissipation integrated inductor box, characterized in that: It comprises a box body (1), the interior of which is used to accommodate at least two groups of inductor coil groups (2); A heat dissipation fin (12) is arranged on the outer surface of the bottom surface of the box body (1), and the heat dissipation fin (12) extends along the length direction of the box body (1). The heat dissipation fin (12) comprises a bending and redirecting portion (121) and a straight portion (122). The bending and redirecting portion (121) is arranged at one end close to the fan (3), one end of the bending and redirecting portion (121) faces the fan (3), and the other end faces the straight portion (122). The bending and redirecting portion (121) is used to guide the airflow of the fan (3) toward the straight portion (122).

2. The heat dissipation integrated inductor box according to claim 1, characterized in that: The straight portion (122) comprises a plurality of independent segments, and a spacing space is provided between two adjacent segments.

3. The heat dissipation integrated inductor box according to claim 2, characterized in that: The intervals between the segments of the straight portion (122) are located at the junction of the two groups of inductor coil groups (2).

4. The heat dissipation integrated inductor box according to claim 1, characterized in that: The heat dissipation fin (12) comprises a longitudinal baffle (123), wherein the longitudinal baffle (123) is a continuous and uninterrupted plate and is used to block the lateral outflow of airflow.

5. The heat dissipation integrated inductor box according to claim 1, characterized in that: A first profiling protrusion (11) is protruded on the inner surface of the bottom surface of the box body (1); the shape of the first profiling protrusion (11) matches the shape of the inductor coil group (2) and forms a consistent gap size with two coils of a group of the inductor coil group (2); A first profiling groove (111) is provided on the outer surface of the bottom surface of the box body (1), and the first profiling groove (111) is formed to match the first profiling protrusion (11), so that the bottom surface of the box body (1) forms a uniform thickness at the first profiling protrusion (11).

6. The heat dissipation integrated inductor box according to claim 1, characterized in that: A second profiling protrusion (14) is provided on the inner surface of the bottom surface of the box body (1); the shape of the second profiling protrusion (14) matches the shape of the inductor coil group (2) and forms a consistent gap size with two adjacent groups of the inductor coil groups (2); A second profiling groove (141) is provided on the outer surface of the bottom surface of the box body (1), and the second profiling groove (141) is formed to match the second profiling protrusion (14), so that the bottom surface of the box body (1) forms a uniform thickness at the second profiling protrusion (14).

7. The heat dissipation integrated inductor box according to claim 1, characterized in that: The length of the first profiling protrusion (11) provided on the bottom surface of the box body (1) is smaller than the length of the second profiling protrusion (14) provided on the bottom surface of the box body (1).

8. The heat dissipation integrated inductor box according to any one of claims 1 to 7, characterized in that: A partition plate (13) is arranged in the inner cavity of the box body (1), and the partition plate (13) is used to divide the inner cavity of the box body (1) into different chambers, each chamber being capable of accommodating at least one group of the inductor coil group (2); the partition plate (13) is used to conduct heat to the bottom surface and the side surfaces.

9. The heat dissipation integrated inductor box according to claim 1, characterized in that: Two opposite side walls of the box body (1) protrude inwardly to form a spacing protrusion (15), and the spacing protrusion (15) is arranged between two adjacent inductor coil groups (2).

10. An inverter, characterized in that: The invention comprises the heat dissipation integrated inductor box according to any one of claims 1 to 9, wherein the box body (1) is arranged on the outer side of the bottom surface of the inverter chassis; a fan (3) is arranged on the bottom surface of the inverter chassis, and the axis of the fan (3) is parallel to the length direction of the box body (1) and is not collinear.

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