An inverter housing with annular water-cooled friction welding

Abstract

This utility model relates to the field of inverter housing technology, specifically to an inverter housing with annular water-cooled friction welding. It includes a heat-absorbing housing with symmetrically arranged handles. The heat-absorbing housing comprises an upper cover, a protective shell, a heat dissipation unit, and a support base connected sequentially from top to bottom. The heat dissipation unit includes a connecting plate disposed between the protective shell and the support base. A heat-conducting plate is disposed on the top surface of the connecting plate and is connected to the protective shell. This inverter housing with annular water-cooled friction welding features a shorter, more agile coolant flow path compared to traditional serpentine pipes, resulting in smoother fluid flow, lower resistance loss, reduced pump power consumption, and reduced energy consumption. Furthermore, the friction welding process reduces the number of welding points compared to the multi-segment welding of traditional serpentine pipes, resulting in better sealing and lower leakage risk. The annular structure also facilitates die-casting, simplifying the manufacturing process and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of inverter housing technology, specifically to an inverter housing with annular water-cooled friction welding. Background Technology

[0002] An inverter is a converter that transforms DC power (batteries, storage batteries) into AC power (typically 220V, 50Hz sine wave) with fixed frequency and voltage or adjustable frequency and voltage. When working or traveling, an inverter can be connected to a storage battery to power electrical appliances and various tools. It is already widely used in photovoltaic power plants for power transmission.

[0003] Current inverters are prone to generating high temperatures during operation, leading to incomplete and uneven heat dissipation, which can inevitably cause damage due to high temperatures. Patent CN219068556U proposes a high-strength aluminum water-cooled inverter housing, including a cover plate, a heat-absorbing shell, an inverter housing, and a heat dissipation plate. The inverter housing is located in the middle, with the cover plate and heat dissipation plate on the left and right sides of the inverter housing, respectively. The heat-absorbing shell is located between the inverter housing and the cover plate. The advantages are: first, the inverter housing is made of aluminum alloy, which is lightweight and has good rigidity and thermal conductivity; second, it adopts a water-cooling structure, which has strong cooling performance; and third, the inverter housing adopts a layered structure, which is compact and small in size.

[0004] The aforementioned existing technologies have improved the heat dissipation capacity of inverters to a certain extent, but their water cooling channels use serpentine pipes. This long-distance and multi-bend coolant flow path will generate eddies and local resistance, resulting in uneven coolant flow velocity, reduced heat exchange efficiency, weakened heat dissipation effect, and affected overall inverter performance. To address this, we propose an inverter housing with annular water cooling friction welding. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides an inverter housing with an annular water-cooled friction welding mechanism, comprising a heat-absorbing housing, symmetrically provided handles on the heat-absorbing housing, and the heat-absorbing housing comprising an upper cover, a protective shell, a heat dissipation unit, and a support base connected sequentially from top to bottom.

[0006] In some embodiments, the heat dissipation unit includes a connecting plate disposed between the protective shell and the support base. A heat-conducting plate is disposed on the top surface of the connecting plate and is connected to the protective shell. Two water-cooled heat dissipation mechanisms are symmetrically disposed inside the connecting plate. A heat dissipation return mechanism is disposed on the bottom surface of the protective shell and is connected to the two water-cooled heat dissipation mechanisms through several connecting pipes. The heat dissipation return mechanism includes a water pump, an exhaust fan, and a heat-conducting plate.

[0007] In some embodiments, the water-cooled heat dissipation mechanism includes a heat dissipation water channel formed in the connecting plate, and the heat dissipation water channel is configured as a ring. A baffle is provided on the heat dissipation water channel to form a closed structure at both ends. An inlet and an outlet are respectively provided at both ends of the heat dissipation water channel, and the inlet and outlet form a complete water channel through a connecting pipe and a heat dissipation return mechanism.

[0008] In some embodiments, the connecting plate has symmetrically arranged heat dissipation vents, and the heat dissipation vents are located at the center of the heat dissipation water channel. An isolation frame is provided in the heat dissipation water channel, and a cooling fan is provided on the isolation frame.

[0009] In some embodiments, the connecting plate is symmetrically provided with annular air ducts, and the annular air ducts and heat dissipation vents form a connecting air path through evenly distributed heat dissipation air ducts. Air outlets are provided on both sides of the connecting plate, and the air outlets are connected to the annular air ducts.

[0010] In some embodiments, a filling block is provided on the side of the annular air duct near the inlet and outlet.

[0011] In some embodiments, the isolation frame and the heat dissipation vent are fixed together by a number of connecting blocks.

[0012] This utility model has at least the following beneficial effects: Compared to traditional serpentine pipes, the annular cooling water channel has a shorter coolant flow path without sharp turns, resulting in smoother fluid flow, less resistance loss, reduced water pump power consumption, and reduced energy consumption. After being manufactured using friction welding technology, compared to the multi-segment welding of traditional serpentine pipes, there are fewer welding points, better sealing, and lower leakage risk. At the same time, the annular structure is easier to die-cast, simplifying the manufacturing process and improving production efficiency. The design of the heat dissipation air duct and the ring air duct realizes the circulation of airflow within the connecting plate, avoiding local heat accumulation. The combination of air cooling and water cooling further improves heat dissipation efficiency. The smaller temperature difference between the inlet and outlet makes the temperature around the inverter's heat-generating components more uniform, effectively improving the overall performance and stability of the inverter. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the heat-absorbing shell structure of this utility model; Figure 3 This is a schematic diagram of the heat dissipation unit structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the connecting plate of this utility model; Figure 5 This is a schematic diagram of the annular air duct structure of this utility model.

[0014] In the diagram: 1. Heat-absorbing shell; 2. Handle; 3. Top cover; 4. Protective shell; 5. Heat dissipation unit; 6. Support base; 7. Connecting plate; 8. Heat-conducting plate; 9. Cooling fan; 10. Heat dissipation return mechanism; 11. Connecting pipe; 12. Air outlet; 13. Circular air duct; 14. Heat dissipation water channel; 15. Baffle; 16. Inlet; 17. Outlet; 18. Filler block; 19. Heat dissipation vent; 20. Isolation frame; 21. Heat dissipation air duct; 22. Water-cooled heat dissipation mechanism. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1 Please see Figures 1-5 This utility model provides a technical solution: An inverter housing with annular water-cooled friction welding includes a heat-absorbing housing 1, with handles symmetrically arranged on the heat-absorbing housing 1. The heat-absorbing housing 1 includes an upper cover 3, a protective shell 4, a heat dissipation unit 5, and a support base 6 connected sequentially from top to bottom. The upper cover 3 is made of aluminum alloy plate with an anodized surface, which has good wear resistance and corrosion resistance. The protective shell 4 is made of aluminum-magnesium alloy and is formed by stamping. It has reserved space inside for installing the core components of the inverter and can effectively prevent dust and water. The support base 6 is made of high-strength cast aluminum material to support the entire housing and play a certain role in shock absorption. The heat dissipation unit 5 includes a connecting plate 7 disposed between the protective shell 4 and the support base 6. A heat-conducting plate 8 is disposed on the top surface of the connecting plate 7 and is connected to the protective shell 4. Two water-cooled heat dissipation mechanisms 22 are symmetrically arranged inside the connecting plate 7. A heat dissipation return mechanism 10 is disposed on the bottom surface of the protective shell 4 and is connected to the two water-cooled heat dissipation mechanisms 22 through several connecting pipes 11. The heat dissipation return mechanism 10 includes a water pump, an exhaust fan, and heat-conducting plates. The water-cooled heat dissipation mechanism 22 includes a heat dissipation water channel 14 opened in the connecting plate 7 and is configured as a ring. A baffle 15 is provided on the heat dissipation water channel 14 to form a closed structure at both ends. An inlet 16 and an outlet 17 are respectively opened at both ends of the heat dissipation water channel 14, and the inlet 16 and the outlet 17 form a complete water channel through the connecting pipes 11 and the heat dissipation return mechanism 10. The heat-conducting plate 8 is tightly connected to the bottom surface of the protective shell 4 to ensure efficient heat conduction. Two water-cooling heat dissipation mechanisms 22 are symmetrically arranged inside the connecting plate 7. This is manifested by a heat dissipation water channel 14 opened inside the connecting plate 7. The heat dissipation water channel 14 is designed as a ring, and a baffle 15 is welded on the heat dissipation water channel 14 to form a closed structure at both ends. The two ends of the heat dissipation water channel 14 are respectively provided with an inlet 16 and an outlet 17, which are connected to the heat dissipation return mechanism 10 through a connecting pipe 11 to form a complete water circulation heat dissipation circuit. The heat dissipation return mechanism 10 integrates a water pump, an exhaust fan, and a heat-conducting fin. The water pump is a micro water pump, which can stably drive the coolant to circulate in the water channel. The exhaust fan is used for auxiliary heat dissipation. The heat-conducting fin is made of aluminum heat dissipation fins with a large surface area, which can quickly dissipate heat into the air.

[0017] When the inverter generates heat during operation, the heat is first conducted through the protective shell 4 to the heat conduction plate 8, and then the heat conduction plate 8 transfers the heat to the connecting plate 7. At this time, the water pump in the heat dissipation return mechanism 10 starts, pushing the coolant from the inlet 16 into the heat dissipation water circuit 14. The coolant flows evenly in the annular heat dissipation water circuit 14, fully absorbing the heat on the connecting plate 7. After carrying away the heat, the coolant flows back to the heat dissipation return mechanism 10 from the outlet 17 through the connecting pipe 11. In the heat dissipation return mechanism 10, the high-temperature coolant first passes through the heat dissipation fins, and the heat is transferred to the fins through heat conduction. Then the exhaust fan works to accelerate the airflow and quickly carry away the heat on the heat dissipation fins, so that the coolant is cooled down. The cooled coolant is pumped out again by the water pump and enters the next cycle, thereby achieving continuous heat dissipation of the inverter shell.

[0018] Compared to traditional serpentine pipes, the annular cooling water channel 14 shortens the coolant flow path, reduces the temperature difference between the coolant inlet and outlet, and makes the temperature around the inverter's heating elements more uniform, effectively improving the overall performance and stability of the inverter. The path is short and has no sharp turns, resulting in smoother fluid flow, less resistance loss, and reduced water pump power consumption. It can be distributed around the heating elements, allowing the coolant to directly and evenly contact the heating area, avoiding local hot spots. The annular channel can be more easily achieved through die casting or friction welding, especially the integrated design, which has fewer processing steps and welding points, making it less prone to leakage and providing better sealing. In contrast, the serpentine channel may have more interfaces, increasing the risk of leakage.

[0019] Example 2 Please see Figures 1-5 This utility model provides a technical solution: The connecting plate 7 has symmetrically arranged heat dissipation vents 19, and the heat dissipation vents 19 are located at the axis of the heat dissipation water channel 14. An isolation frame 20 is provided in the heat dissipation water channel 14, and a cooling fan 9 is provided on the isolation frame 20. The isolation frame 20 and the heat dissipation vents 19 are fixed by several connecting blocks.

[0020] Unlike Embodiment 1, Embodiment 2 adds structures such as a cooling fan 9, an isolation frame 20, and a heat dissipation port 19. After the cooling fan 9 is started, the airflow is drawn from the bottom upwards, and the generated airflow is blown out through the isolation frame 20 to the heat dissipation port 19. During the flow of the airflow, it will carry away some of the heat around the cooling water channel 14 and the surface of the connecting plate 7, accelerating the heat dissipation and effectively solving the heat dissipation problem in areas that the cooling water channel 14 cannot cover. At the same time, the isolation frame 20 plays a role in fixing and protecting the cooling fan 9. The combination of air cooling and water cooling further accelerates the heat dissipation speed.

[0021] Example 3 Please see Figures 1-5 This utility model provides a technical solution: The connecting plate 7 has symmetrically arranged annular air ducts 13, and the annular air ducts 13 and the heat dissipation vents 19 form a connecting air path through the evenly distributed heat dissipation air ducts 21. The connecting plate 7 has air outlets 12 on both sides, and the air outlets 12 are connected to the annular air ducts 13. The annular air ducts 13 have filling blocks 18 on the side near the input port 16 and the output port 17.

[0022] Unlike Embodiment 1, the airflow layout is optimized by adding structures such as the annular air duct 13, the heat dissipation air duct 21, and the air outlet 12. The airflow generated by the operation of the cooling fan 9 carries away the heat of the part not covered by the cooling water channel 14, and then flows into the annular air duct 13 through the heat dissipation air duct 21. The airflow flows along the annular path in the annular air duct 13 and finally exits from the air outlet 12. The annular air duct 13 and the heat dissipation air duct 21 guide the airflow to circulate in the connecting plate 7, further carrying away heat. Working together with the water cooling heat dissipation mechanism 22, more efficient heat dissipation is achieved. Since the heat dissipation air duct 21 extends along the inner radial and outer diameter of the cooling water channel 14 and the path covers the surface area of ​​the cooling water channel 14, it can better carry away the heat on the cooling water channel 14 and reduce the temperature difference.

Claims

1. A belt ring water-cooled friction welding inverter shell, comprising a heat absorption shell (1), a handle (2) is symmetrically arranged on the heat absorption shell (1), characterized in that: The heat-absorbing shell (1) includes an upper cover (3), a protective shell (4), a heat dissipation unit (5), and a support base (6) connected sequentially from top to bottom. The heat dissipation unit (5) includes a connecting plate (7) disposed between the protective shell (4) and the support base (6). A heat-conducting plate (8) is disposed on the top surface of the connecting plate (7), and the heat-conducting plate (8) is connected to the protective shell (4). Two water-cooled heat dissipation mechanisms (22) are symmetrically disposed inside the connecting plate (7). A heat dissipation return mechanism (10) is disposed on the bottom surface of the protective shell (4), and the heat dissipation return mechanism (10) is connected by several connecting pipes (11). The heat dissipation mechanism (10) is connected to two water-cooled heat dissipation mechanisms (22). The heat dissipation return mechanism (10) includes a water pump, an exhaust fan and a heat-conducting plate. The water-cooled heat dissipation mechanism (22) includes a heat dissipation water channel (14) opened in the connecting plate (7). The heat dissipation water channel (14) is set as a ring. A baffle (15) is provided on the heat dissipation water channel (14) to form a closed structure at both ends. An inlet (16) and an outlet (17) are opened at both ends of the heat dissipation water channel (14). The inlet (16) and the outlet (17) form a complete water channel through the connecting pipe (11) and the heat dissipation return mechanism (10).

2. The band ring water-cooled friction welding inverter housing of claim 1, wherein: The connecting plate (7) has symmetrically opened heat dissipation ports (19), and the heat dissipation ports (19) are located at the axial position of the heat dissipation water channel (14). An isolation frame (20) is provided in the heat dissipation water channel (14), and a heat dissipation fan (9) is provided on the isolation frame (20).

3. The band ring water-cooled friction welding inverter housing of claim 2, wherein: The connecting plate (7) is symmetrically provided with annular air ducts (13), and the annular air ducts (13) and the heat dissipation vents (19) are connected by a uniformly distributed heat dissipation air duct (21). Air outlets (12) are provided on both sides of the connecting plate (7), and the air outlets (12) are connected to the annular air ducts (13).

4. The band ring water-cooled friction welding inverter housing of claim 3, wherein: A filling block (18) is provided on the side of the annular air duct (13) near the inlet (16) and outlet (17).

5. The band ring water-cooled friction welding inverter housing of claim 2, wherein: The isolation frame (20) and the heat dissipation port (19) are fixed by several connecting blocks.

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