A bidirectional inverter
By constructing a forced air cooling path and a layered airflow design in the bidirectional inverter, the problem of heat accumulation between fins was solved, achieving a more efficient and uniform heat dissipation effect and ensuring the stable operation of the inverter.
Patent Information
- Application Number
- CN202522420404.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-14
AI Technical Summary
Existing bidirectional inverters have slow fin heat dissipation speed, and heat accumulates in the narrow gaps between the fins, which affects heat dissipation performance and operational stability.
A forced air cooling path was designed, including an exhaust fan, a wind box, an air guide box, an air guide duct, and an end surround plate. Through the layered design of the air guide plate and the air guide slope plate, the cooling air is evenly distributed and effectively removes heat.
It improves heat dissipation efficiency and uniformity, breaks up the stagnant air layer between the fins, avoids airflow collision and wind pressure loss, and ensures efficient heat dissipation and stable operation of the inverter.
Smart Images
Figure CN224935953U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of equipment heat dissipation technology, and in particular to a bidirectional inverter. Background Technology
[0002] A bidirectional inverter is a power electronic device with bidirectional energy conversion capabilities, capable of converting direct current (DC) power to alternating current (AC) power, and vice versa. This device plays a crucial role in modern power systems, particularly in renewable energy applications and power flow control within power systems.
[0003] Because bidirectional inverters generate a significant amount of heat during operation, effective heat dissipation design and management are crucial to ensure system stability and reliability. Inverters typically use aluminum heat sinks (also known as fins), which are in close contact with the heat-generating components inside the inverter. Heat is transferred to the fins through thermal conduction, and then dissipated into the surrounding environment through the large surface area of the fins.
[0004] In the process of developing this solution, the inventors discovered the following unresolved issues in the existing technology: While fins have a certain thermal conductivity and heat dissipation effect, they primarily rely on natural convection and radiation to dissipate heat, resulting in a relatively slow heat dissipation rate. A significant portion of the heat accumulates in the narrow gaps between adjacent fins, forming a stagnant air layer that prevents rapid heat dissipation, thus affecting the overall heat dissipation performance and operational stability of the inverter. Utility Model Content
[0005] The main objective of this invention is to provide a bidirectional inverter that can effectively solve the problems in the background technology.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A bidirectional inverter includes an inverter body. Several parallel-arranged fins are disposed on the outer surfaces of both sides of the inverter body to increase the heat dissipation area. The two ends of the fins on both sides are fixedly connected by an end-enclosing plate. The end-enclosing plate closes and connects the two ends of all fins on the same side into a single unit, and has a top opening at its upper end.
[0007] The inverter body has air boxes at both ends of its top. Each air box has an air inlet at its top, and an exhaust fan is installed inside the air box below the air inlet. A guide vane box is fixedly connected to the bottom of each air box, and the cross-sectional area of the guide vane box gradually decreases along the airflow direction. The outlet of the guide vane box is fixedly connected to and communicates with the middle of a horizontally arranged guide duct. Both ends of the guide duct are respectively sealed and connected to the top opening of the corresponding end-covering plate.
[0008] Each fin located within the end surround plate has an inclined guide plate fixed at both ends, and the length of the upper guide plate is less than the length of the lower guide plate, thus forming a layered air guiding structure with an increasing air guiding area from top to bottom.
[0009] A guide plate is fixed at the middle position between two adjacent fins. The cross-section of the guide plate is an arc or wedge-shaped structure with a high center and low sides.
[0010] Preferably, the bottom of the air box is provided with an inclined air guide plate to smoothly guide the drawn-in airflow to the air guide box below.
[0011] Preferably, the air box and the air guide box, as well as the air guide box and the air guide duct, are fixed and sealed by welding or bolts.
[0012] Preferably, the inclination angle of the air guide plate is 30° to 60°.
[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model constructs a complete forced air cooling path through an exhaust fan, air box, air guide box, air guide duct and end surround plate, which can accurately deliver external cooling air to the gap between the fins that are most prone to heat accumulation, directly blow on the fin surface, break the stagnant air layer, and greatly improve heat dissipation efficiency.
[0014] 2. The air guide plates set at both ends of the fins in this utility model, especially their layered design with increasing length from top to bottom, can "distribute" and "guide" the concentrated airflow from the top opening, so that it enters the gap between each layer of fins evenly, avoiding the problem that most of the airflow passes through the gaps at the top while the ventilation at the bottom is insufficient, thus ensuring the overall heat dissipation uniformity.
[0015] 3. The air guide slope plate set between adjacent fins in this utility model has an arc or wedge-shaped structure that can guide the airflow from both ends to both sides, effectively avoiding turbulence and wind pressure loss caused by airflow collision in the middle of the fins, so that the airflow can carry away heat more smoothly and further improve the heat dissipation performance. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of one side of a bidirectional inverter according to the present invention; Figure 2 This is a schematic diagram of the other side of the structure of a bidirectional inverter according to the present invention; Figure 3 This is a schematic diagram of the structure of a bidirectional inverter according to the present invention, showing a portion of the air guide slope plate exploding from the fins. Figure 4 This is a cross-sectional view of the air guide box and air box of a bidirectional inverter according to this utility model.
[0017] In the diagram: 1. Inverter body; 2. Fins; 3. End surround plate; 4. Top opening; 5. Air guide plate; 6. Air guide slope plate; 7. Air guide duct; 8. Air box; 9. Air guide box; 10. Air inlet; 11. Exhaust fan; 12. Air guide plate. Detailed Implementation
[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0019] like Figures 1 to 4 As shown, a bidirectional inverter includes an inverter body 1. Multiple sets of parallel aluminum fins 2 are tightly fixed to both sides of the inverter body 1 using thermally conductive silicone or screws. These fins 2 are fixed by end-mounted plates 3 at both ends. The end-mounted plates 3 are connected to the outermost fins 2 by screws, thus connecting all the fins 2 into a stable whole. A top opening 4 is provided at the top of the end-mounted plates 3.
[0020] The top two ends of the inverter body 1 are fixed with air boxes 8 by brackets or direct welding. The top of the air box 8 has an air inlet 10, and an exhaust fan 11 (such as an axial fan) is installed inside. The bottom of the air box 8 is fixedly connected to a guide box 9 by flanges and sealing rings to ensure airtightness. The air outlet of the guide box 9 is welded to the middle of a horizontally set round or square tube-shaped air guide duct 7. The two ends of the air guide duct 7 are connected to the top openings 4 on the end surround plates 3 on both sides by rubber sealing rings or welding, thus forming a complete sealed air duct from the air box 8 to the gap between the fins 2.
[0021] At both ends of each fin 2 extending into the end-enclosing plate 3, inclined air guide plates 5 are welded. All upper air guide plates 5 are shorter in length, while lower air guide plates 5 are longer, forming a gradually changing airflow surface. At the midpoint between two adjacent fins 2, an air guide slope plate 6 is fixed by a slot or spot welding. The longitudinal section of this air guide slope plate 6 is a smooth arc, with its highest point aligned with the center line of the gap between the fins 2. An inclined air guide plate 12 is also provided on the inner bottom wall of the air box 8 to guide the airflow more concentratedly into the air guide box 9.
[0022] Working principle: When the bidirectional inverter is working, its internal power components generate heat, which is conducted to the fins 2. At the same time, the exhaust fan 11 is activated, and external cooling air is drawn into the air box 8 from the air inlet 10, and then enters the air guide box 9 under the guidance of the air guide plate 12. The air guide box 9 contracts and accelerates the airflow before sending it into the air guide duct 7. The airflow is divided into two streams in the air guide duct 7, flowing to the end surround plates 3 at both ends, and then blown out through the top opening 4.
[0023] The blown airflow first encounters the guide vanes 5 at both ends of the fins 2. Because the guide vanes 5 are layered and inclined, the airflow is evenly distributed and directed to each gap in the fins 2. The forced cooling air carries away heat directly from the surface of the fins 2 as it flows. When flowing through the middle of the gaps in the fins 2, it encounters a guide ramp 6, which smoothly guides the airflow from both ends towards the outer side of the fins 2, preventing airflow from colliding in the middle. This allows the heat-carrying air to be smoothly and unobstructedly discharged from both sides of the fin assembly, continuously achieving efficient heat dissipation.
[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A bidirectional inverter, comprising an inverter body (1), characterized in that: The inverter body (1) has several parallel fins (2) on both sides, and the two ends of the two fins (2) are fixedly connected by end surround plates (3); the top two ends of the inverter body (1) are respectively provided with air boxes (8), the air boxes (8) are connected to the air duct (7) through the air guide box (9), and the two ends of the air guide pipe (7) are respectively connected to the end surround plates (3) on the corresponding side; the air box (8) has an air inlet (10) at the top, an exhaust fan (11) inside, and an air guide plate (12) at the bottom; an air guide slope plate (6) is provided between two adjacent fins (2), and an air guide edge plate (5) is provided at both ends of the fins (2).
2. The bidirectional inverter according to claim 1, characterized in that: The top of the end surround plate (3) has a top opening (4) at the position corresponding to the air guide pipe (7) to guide airflow into the fin gap.
3. A bidirectional inverter according to claim 1, characterized in that: The air box (8) and the air guide box (9) are fixedly connected by welding or bolts and are internally connected; the air guide box (9) and the air guide pipe (7) and the air guide pipe (7) and the end surround plate (3) are sealed connections.
4. A bidirectional inverter according to claim 1, characterized in that: The air guide plate (5) is inclinedly arranged at both ends of the fin (2), and the length of the upper air guide plate (5) is less than that of the lower air guide plate (5), forming a layered air guide structure.
5. A bidirectional inverter according to claim 4, characterized in that: The inclination angle of the air guide plate (5) is 30°–60°, which is used to guide the airflow to enter the fin gap evenly.
6. A bidirectional inverter according to claim 1, characterized in that: The wind guide slope plate (6) is an arc-shaped or wedge-shaped structure, fixed in the middle position between adjacent fins (2), used to separate and guide the airflow on both sides to be discharged outward.
7. A bidirectional inverter according to claim 1, characterized in that: The air guide plate (12) is inclinedly disposed at the bottom of the air box (8) to guide the airflow to the air guide box (9).