Capacitor aluminum shell with efficient heat dissipation
By incorporating a heat dissipation device inside the aluminum casing of the capacitor, utilizing the thermal conductivity of copper and the cost-effectiveness of aluminum, combined with a fan and coolant circulation, the problem of slow heat dissipation in the aluminum casing of the capacitor is solved, achieving efficient heat dissipation and extending the service life of the capacitor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-15
AI Technical Summary
The existing aluminum casing of capacitors has poor heat dissipation design, which prevents heat from being dissipated quickly and effectively, leading to overheating and damage to the capacitors and reducing their service life.
It adopts an internal heat dissipation device, including a heat sink base, heat pipes and heat conduction plates, which utilizes the thermal conductivity of copper and aluminum materials, combined with a fan and coolant circulation, to improve heat dissipation efficiency.
It effectively reduces the probability of capacitor overheating, extends the life of capacitors, reduces the risk of damage, improves heat dissipation efficiency, and reduces costs.
Smart Images
Figure CN224248461U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of capacitor aluminum shell technology, and in particular to a capacitor aluminum shell with high heat dissipation efficiency. Background Technology
[0002] Two conductors placed close together, with a non-conductive insulating medium sandwiched between them, constitute a capacitor. When a voltage is applied between the two plates of a capacitor, it stores electrical charge. The capacitance of a capacitor is numerically equal to the ratio of the charge on one conducting plate to the voltage between the two plates. A capacitor is generally called a capacitor, represented by the letter C. The term "capacitor" usually has two meanings: first, it is a container used to store electrical energy; it is a device that holds electricity. Capacitors are one of the most widely used electronic devices in electronic equipment, used extensively in circuit technology for blocking DC and passing AC, energy conversion, and control. The second meaning is that almost any two insulated conductors placed very close together form a capacitor, and the aluminum casing of the capacitor serves a protective function.
[0003] Chinese utility model patent CN210489446U discloses an improved aluminum shell for a thin-film capacitor, which includes a shell consisting of an outer shell and an inner shell. The inner shell is disposed within the cavity of the outer shell. The inner surface of the inner shell is provided with an annular first protrusion and a second protrusion, and the length of the first protrusion is twice that of the second protrusion. The first protrusion is located on top of the second protrusion. The inner surface of the inner shell is provided with a protrusion.
[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: the above-mentioned device only dissipates heat through heat dissipation holes opened on the bottom wall of the outer shell, which results in the inability to quickly and effectively dissipate the heat inside the aluminum shell, causing the internal capacitor to easily overheat and be damaged during use, thereby reducing the service life of the internal capacitor. Utility Model Content
[0005] To address the aforementioned problems, this invention provides a capacitor aluminum shell with high-efficiency heat dissipation.
[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a high-efficiency heat dissipation capacitor aluminum shell, comprising a hollow capacitor aluminum shell body, a sealing cover installed at the lower end of the capacitor aluminum shell body, the sealing cover being made of aluminum material, a capacitor body installed inside the capacitor aluminum shell body, the lower end of the capacitor body penetrating through the sealing cover and extending beyond the sealing cover, and a heat dissipation device for dissipating heat from the capacitor body installed inside the capacitor aluminum shell body.
[0007] By adopting the above technical solution, the capacitor body will generate heat during use. At this time, the heat dissipation device installed inside the aluminum shell of the capacitor body dissipates heat from the capacitor body. In this process, the heat dissipation device has high heat dissipation efficiency, thereby reducing the probability of overheating during use, thus reducing the probability of damage to the capacitor body, and extending the service life of the capacitor body.
[0008] Furthermore, the heat dissipation device includes a heat dissipation base mounted on the upper surface of the capacitor body, multiple heat-conducting pipes mounted on the heat dissipation base, and multiple heat-conducting plates mounted together on the multiple heat-conducting pipes. The heat dissipation base is fixed to the inner top wall of the capacitor aluminum shell body, and the heat-conducting pipes penetrate the capacitor aluminum shell body and extend beyond the capacitor aluminum shell body.
[0009] By adopting the above technical solution, the heat dissipation device allows the heat dissipation base to contact the capacitor body during use, thereby absorbing the heat generated by the capacitor body. The heat dissipation base then transfers the absorbed heat to the heat pipe, which in turn transfers the heat to the heat-conducting plate. At this point, the heat-conducting plate is in direct contact with the outside air, transferring the heat into the air to complete heat dissipation. During this process, operators can also use a fan to further dissipate heat from the heat-conducting plate, further improving heat dissipation efficiency and reducing the probability of overheating during capacitor use. This reduces the probability of capacitor damage and extends the lifespan of the capacitor.
[0010] Furthermore, the heat dissipation base has an internal receiving groove containing a heat-conducting liquid, and the heat dissipation base is made of copper.
[0011] By adopting the above technical solution, copper has excellent thermal conductivity. The heat dissipation base made of copper and the heat-conducting liquid set inside the heat dissipation base further improve the heat dissipation efficiency of the heat dissipation base, thereby rapidly transferring the heat of the capacitor body to the heat pipe, thus improving the heat dissipation efficiency.
[0012] Furthermore, the heat pipe is a copper tube, and the heat-conducting sheet is an aluminum sheet.
[0013] By adopting the above technical solution, the heat pipe made of copper improves the heat conduction efficiency, thereby improving the heat dissipation efficiency. Although the heat conduction efficiency of the heat-conducting plate made of aluminum is lower than that of copper, aluminum is less expensive, thus reducing the purchase cost of the device. In addition, since the heat-conducting plate is in direct contact with the air, heat dissipation can also be achieved through a fan, and the heat-conducting plate made of aluminum is sufficient to meet the heat dissipation requirements of the capacitor body.
[0014] Furthermore, the heat sink base and the capacitor body are connected to each other by silicone grease, which has a thermal conductivity of 6W / m*k.
[0015] By adopting the above technical solution, no matter how the heat sink base and the capacitor body are installed, they cannot achieve complete contact. There will always be a gap between the heat sink base and the capacitor body. However, by connecting them with silicone, complete contact can be achieved. The contact area is increased, and the heat conduction efficiency is also increased, thereby improving the heat dissipation efficiency.
[0016] Furthermore, each of the heat pipes has a storage tank inside, and the storage tank contains coolant, which is a coolant made of Freon.
[0017] By adopting the above technical solution, a coolant is placed inside the heat pipe. When the heat pipe is heated, this liquid will evaporate at the lower end of the heat pipe, thereby absorbing heat from the surrounding environment. The vapor generated by evaporation moves inside the heat pipe, carrying heat from the lower end to the upper end. At the upper end, the vapor encounters the cooler copper pipe wall and will re-condense into coolant, releasing heat. The condensed coolant flows back to the lower end by gravity, completing a cycle. In this process, some heat can be released, thereby improving heat dissipation efficiency.
[0018] Furthermore, mounting holes are provided on the upper surfaces of the plurality of heat-conducting sheets. The heat-conducting pipes pass through the mounting holes and are connected to the heat-conducting sheets. The diameter of the mounting holes is smaller than the diameter of the heat-conducting pipes. The heat-conducting pipes and heat-conducting sheets are connected to each other by an interference fit.
[0019] By adopting the above technical solution, the heat pipe and the heat-conducting plate are connected to each other through an interference fit, which increases the contact area between the heat pipe and the heat-conducting plate, thereby improving the heat conduction efficiency and thus improving the heat dissipation efficiency.
[0020] Furthermore, the surfaces of all of the heat pipes are plated with a layer of nickel.
[0021] By adopting the above technical solution, the surface of the heat pipe is plated with a layer of nickel, which reduces the probability of corrosion and thus extends the service life of the device. Furthermore, although the nickel plating reduces thermal conductivity, it improves the contact efficiency with the heat-conducting plate, thereby enhancing the overall thermal conductivity.
[0022] In summary, this utility model has the following beneficial effects:
[0023] 1. In this application, the capacitor body generates heat during use. At this time, a heat dissipation device installed inside the aluminum shell of the capacitor body dissipates heat from the capacitor body. In this process, the heat dissipation device has high heat dissipation efficiency, thereby reducing the probability of overheating during use of the capacitor body, thus reducing the probability of damage to the capacitor body, and extending the service life of the capacitor body;
[0024] 2. In this application, the heat dissipation device involves the heat dissipation base contacting the capacitor body during use, thereby absorbing the heat generated by the capacitor body. The heat dissipation base then transfers the absorbed heat to the heat pipe, which in turn transfers the heat to the heat-conducting plate. At this point, the heat-conducting plate is in direct contact with the outside air, transferring the heat into the air to complete the heat dissipation. During this process, workers can also use a fan to dissipate heat from the heat-conducting plate, further improving heat dissipation efficiency and reducing the probability of overheating during capacitor use. This reduces the probability of capacitor damage and extends the service life of the capacitor.
[0025] 3. In this application, copper has excellent thermal conductivity. The heat dissipation base made of copper and the heat-conducting liquid inside the heat dissipation base further improve the heat dissipation efficiency of the heat dissipation base, thereby rapidly transferring the heat of the capacitor body to the heat pipe, thus improving the heat dissipation efficiency. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0027] Figure 2 This is a cross-sectional structural diagram of the aluminum shell body of the capacitor in an embodiment of this utility model;
[0028] Figure 3 This is a schematic diagram of the heat dissipation device in an embodiment of this utility model.
[0029] In the diagram: 1. Capacitor aluminum shell body; 11. Sealing cover; 12. Capacitor body; 2. Heat dissipation device; 21. Heat dissipation base; 22. Heat pipe; 23. Heat dissipation plate; 3. Receiving groove; 4. Storage groove; 5. Mounting hole. Detailed Implementation
[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0031] like Figure 1-3As shown in the figure, this application discloses a high-efficiency heat dissipation capacitor aluminum shell, including a capacitor aluminum shell body 1, a sealing cover 11, a capacitor body 12, and a heat dissipation device 2. The capacitor aluminum shell body 1 is a hollow cylindrical structure with a vertical axis. The sealing cover 11 is installed at the lower end of the capacitor aluminum shell body 1, and its axis coincides with the axis of the capacitor aluminum shell body 1. The capacitor body 12 is installed inside the capacitor aluminum shell body 1, and the lower end of the capacitor body 12 passes through the sealing cover 11 and extends beyond the sealing cover 11.
[0032] The capacitor body 12 generates heat during use. At this time, the heat dissipation device 2 installed inside the aluminum shell body 1 of the capacitor dissipates heat from the capacitor body 12. In this process, the heat dissipation device 2 has high heat dissipation efficiency, thereby reducing the probability of the capacitor body 12 overheating during use, thus reducing the probability of the capacitor body 12 being damaged, and thus extending the service life of the capacitor body 12.
[0033] A heat dissipation device 2 is installed inside the capacitor aluminum shell body 1 to dissipate heat from the capacitor body 12. The heat dissipation device 2 includes a heat dissipation base 21, heat pipes 22, and heat-conducting plates 23. The heat dissipation base 21 is installed on the upper surface of the capacitor body 12 and is fixed to the inner top wall of the capacitor aluminum shell body 1. Multiple heat pipes 22 are provided and installed on the heat dissipation base 21. The heat pipes 22 penetrate the capacitor aluminum shell body 1 and extend beyond it. Multiple heat-conducting plates 23 are provided and are installed together on multiple heat pipes 22.
[0034] When in use, the heat dissipation device 2's heat dissipation base 21 contacts the capacitor body 12, thereby absorbing the heat generated by the capacitor body 12. Subsequently, the heat dissipation base 21 transfers the absorbed heat to the heat pipe 22, which then transfers the heat to the heat-conducting plate 23. At this point, the heat-conducting plate 23 is in direct contact with the outside air, thus transferring heat into the air to complete heat dissipation. During this process, operators can also use a fan to dissipate heat from the heat-conducting plate 23, further improving heat dissipation efficiency and reducing the probability of overheating during use of the capacitor body 12. This reduces the probability of damage to the capacitor body 12 and extends its service life.
[0035] The heat dissipation base 21 has an internal receiving groove 3, and the heat conduction liquid is placed in the receiving groove 3. The heat dissipation base 21 is made of copper.
[0036] Copper has excellent thermal conductivity. The heat dissipation base 21 made of copper and the heat-conducting liquid inside the heat dissipation base 21 further improve the heat dissipation efficiency of the heat dissipation base 21, thereby rapidly transferring the heat of the capacitor body 12 to the heat pipe 22, thus improving the heat dissipation efficiency.
[0037] The heat pipe 22 is made of copper, and the heat-conducting plate 23 is made of aluminum.
[0038] The copper heat pipe 22 improves thermal conductivity, thereby improving heat dissipation efficiency. Although the aluminum heat pipe 23 has lower thermal conductivity than copper, aluminum is cheaper, thus reducing the purchase cost of the device. In addition, since the heat pipe 23 is in direct contact with the air, it can also dissipate heat through a fan. The aluminum heat pipe 23 is sufficient to meet the heat dissipation requirements of the capacitor body 12.
[0039] To improve heat dissipation efficiency, the heat sink 21 and the capacitor body 12 are connected by thermal grease, which has a thermal conductivity of 6 W / m*k. No matter how the heat sink 21 and the capacitor body 12 are installed, complete contact cannot be achieved; there is always a gap between them. However, by connecting them with silicone, complete contact can be achieved. The increased contact area leads to increased thermal conductivity, thereby improving heat dissipation efficiency.
[0040] Each of the multiple heat pipes 22 has a storage tank 4 inside, and the storage tank 4 contains coolant, which is a coolant made of Freon.
[0041] Coolant is installed inside the heat pipe 22. When the heat pipe 22 is heated, the liquid evaporates at the lower end of the heat pipe 22, thereby absorbing heat from the surrounding environment. The vapor generated by evaporation moves inside the heat pipe 22, carrying heat from the lower end to the upper end. At the upper end, the vapor encounters the cooler copper pipe wall and re-condenses into coolant, releasing heat. The condensed coolant flows back to the lower end by gravity, completing a cycle. In this process, some heat can be released, thereby improving heat dissipation efficiency.
[0042] To improve heat dissipation efficiency, mounting holes 5 are provided through the upper surfaces of multiple heat-conducting plates 23. Heat-conducting pipes 22 pass through these mounting holes 5 and connect to the heat-conducting plates 23. The diameter of the mounting holes 5 is smaller than the diameter of the heat-conducting pipes 22. The heat-conducting pipes 22 and heat-conducting plates 23 are connected by an interference fit. This interference fit increases the contact area between the heat-conducting pipes 22 and heat-conducting plates 23, thereby improving heat conduction efficiency and ultimately heat dissipation efficiency.
[0043] To improve overall thermal conductivity, the surfaces of multiple heat pipes 22 are plated with a layer of nickel. This nickel plating reduces the probability of corrosion of the heat pipes 22, thereby extending the lifespan of the device. Furthermore, while the nickel plating reduces thermal conductivity, it improves the contact efficiency with the heat-conducting plate 23, thus enhancing overall thermal conductivity.
[0044] The working principle of the high-efficiency heat dissipation capacitor aluminum shell in this embodiment is as follows: When the heat dissipation device 2 is in use, the heat dissipation base 21 contacts the capacitor body 12, thereby absorbing the heat generated by the capacitor body 12. Subsequently, the heat dissipation base 21 transfers the absorbed heat to the heat conduction pipe 22, and the heat conduction pipe 22 then transfers the heat to the heat conduction plate 23. At this time, the heat conduction plate 23 is in direct contact with the outside air, thereby transferring the heat into the air to complete the heat dissipation. During this process, the operator can also use a fan to dissipate heat from the heat conduction plate 23, thereby further improving the heat dissipation efficiency, reducing the probability of overheating of the capacitor body 12 during use, thereby reducing the probability of damage to the capacitor body 12, and thus extending the service life of the capacitor body 12.
[0045] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A high-efficiency heat dissipation capacitor aluminum shell, comprising an internally hollow capacitor aluminum shell body (1), characterized in that: A sealing cover (11) is installed at the lower end of the capacitor aluminum shell body (1). The sealing cover (11) is made of aluminum. A capacitor body (12) is installed inside the capacitor aluminum shell body (1). The lower end of the capacitor body (12) passes through the sealing cover (11) and extends outside the sealing cover (11). A heat dissipation device (2) for dissipating heat from the capacitor body (12) is installed inside the capacitor aluminum shell body (1).
2. The high-efficiency heat dissipation aluminum capacitor shell according to claim 1, characterized in that: The heat dissipation device (2) includes a heat dissipation base (21) mounted on the upper surface of the capacitor body (12), a plurality of heat-conducting pipes (22) mounted on the heat dissipation base (21), and a plurality of heat-conducting plates (23) mounted together on the plurality of heat-conducting pipes (22). The heat dissipation base (21) is fixed to the inner top wall of the capacitor aluminum shell body (1). The heat-conducting pipes (22) penetrate the capacitor aluminum shell body (1) and extend to the outside of the capacitor aluminum shell body (1).
3. The high-efficiency heat dissipation aluminum capacitor shell according to claim 2, characterized in that: The heat dissipation base (21) has an internal receiving groove (3) and a heat-conducting liquid is provided in the receiving groove (3). The heat dissipation base (21) is a heat dissipation base (21) made of copper.
4. The high-efficiency heat dissipation aluminum capacitor shell according to claim 2, characterized in that: The heat pipe (22) is a copper tube, and the heat-conducting plate (23) is an aluminum plate.
5. The high-efficiency heat dissipation aluminum capacitor shell according to claim 2, characterized in that: The heat sink (21) and the capacitor body (12) are connected to each other by silicone grease, which has a thermal conductivity of 6W / m*k.
6. The high-efficiency heat dissipation aluminum capacitor shell according to claim 2, characterized in that: Each of the heat pipes (22) has a storage tank (4) inside, and the storage tank (4) contains a coolant, which is a coolant made of Freon.
7. The high-efficiency heat dissipation aluminum capacitor shell according to claim 2, characterized in that: The upper surfaces of the multiple heat-conducting plates (23) are provided with mounting holes (5). The heat-conducting pipe (22) passes through the mounting holes (5) and is connected to the heat-conducting plates (23). The diameter of the mounting holes (5) is smaller than the diameter of the heat-conducting pipe (22). The heat-conducting pipe (22) and the heat-conducting plates (23) are connected to each other by interference fit.
8. The high-efficiency heat dissipation aluminum capacitor shell according to claim 2, characterized in that: The surfaces of all of the heat pipes (22) are plated with a layer of nickel.