Capacitor aluminum shell easy to dissipate heat
By setting heat dissipation fins on the outer periphery of the capacitor aluminum shell and fixing the capacitor core with the O-ring, the problem of difficulty in heat dissipation of the capacitor is solved, and higher heat dissipation efficiency and longer service life are achieved.
Patent Information
- Application Number
- CN202422197311.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The capacitors used in existing high-power power electronic devices are not easy to dissipate heat due to the plastic shell structure, resulting in large heat generation, large volume, and the effective value current cannot be increased.
A cylindrical aluminum shell is used and heat dissipation fins are installed on its outer peripheral wall, and the capacitance core is fixed through the O-ring to increase the heat dissipation area, and the thermal conductivity of the aluminum shell is used to quickly transfer heat to the outside world.
It improves the heat dissipation performance of the capacitor, reduces temperature rise, extends the service life of the capacitor, and can pass a larger effective current or remain stable at the same current.
Smart Images
Figure CN223140577U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to an aluminum shell of a capacitor with easy heat dissipation. Background Art
[0002] In early high-power power electronic devices, there were large current conversions or clamps, and various high-voltage GTO thyristors were used as switching devices. To protect the thyristor from voltage breakdown during switching, a GTO absorption protection capacitor must be used. Currently, such capacitors all use circular plastic shells. Since a large current will pass through the capacitor during actual application, its heat generation is very large, and the plastic shell structure is not easy to dissipate heat, resulting in a large volume of the original capacitor and the inability to increase the effective value current of the capacitor. Content of the Utility Model
[0003] To solve the problems mentioned in the background art, the purpose of the utility model is to provide an aluminum shell of a capacitor with easy heat dissipation.
[0004] To achieve the above objective, the technical solution of the utility model is as follows:
[0005] An aluminum shell of a capacitor with easy heat dissipation includes a cylindrical aluminum shell and two O-rings. A plurality of heat dissipation fins are evenly arranged on the outer peripheral wall of the aluminum shell. Both of the two O-rings are tightly connected in the aluminum shell. A space for accommodating the capacitor core is formed between the two O-rings. The inner hole of the O-ring is used to lead out the electrode terminals of the capacitor core.
[0006] Further, circular grooves are opened in both end ports of the aluminum shell. The outer diameter of the circular groove is larger than the inner diameter of the aluminum shell. The two O-rings are respectively tightly connected in the two circular grooves. The depth of the circular groove is greater than the thickness of the O-ring.
[0007] Further, the heat dissipation fins are parallel to the axis of the aluminum shell. Installation columns are connected to the outer sides of several of the heat dissipation fins. A plurality of the installation columns are evenly distributed around the axis of the aluminum shell. An installation hole parallel to the axis of the aluminum shell is formed through the installation column.
[0008] The beneficial effect of the utility model is that by arranging heat dissipation fins outside the aluminum shell, the heat dissipation area of the aluminum shell is increased, the thermal resistance of the capacitor can be reduced, and the heat inside the capacitor can be effectively transferred to the outside. Since the aluminum shell can quickly conduct the internal heat to the outside, the same specification capacitor can pass a larger effective value current than the original plastic shell capacitor or the temperature rise of the aluminum shell capacitor is lower under the same effective value current. Therefore, the aluminum shell capacitor has a longer service life. Description of the Drawings
[0009] Figure 1 It is an isometric view of an embodiment of the utility model;
[0010] Figure 2 This is a cross-sectional view of an embodiment of the present utility model.
[0011] Description of the reference numerals in the drawings: 1. Aluminum shell, 11. Heat dissipation fins, 12. Mounting posts, 13. Mounting holes, 14. Circular grooves, 2. O-ring. Detailed implementation manners
[0012] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art shall fall within the protection scope of the present utility model.
[0013] As Figure 1 - Figure 2 shown, a capacitor aluminum shell with easy heat dissipation includes a cylindrical aluminum shell 1 and two O-rings 2. A plurality of heat dissipation fins 11 are evenly arranged on the outer peripheral wall of the aluminum shell 1. The heat dissipation fins 11 are parallel to the axis of the aluminum shell 1. The outer edges of four heat dissipation fins 11 located on the diagonal of the aluminum shell 1 are all connected with mounting posts 12. A mounting hole 13 parallel to the axis of the aluminum shell 1 is formed through the mounting posts 12. Circular grooves 14 are formed in both end ports of the aluminum shell 1. The outer diameter of the circular grooves 14 is larger than the inner diameter of the aluminum shell 1. The two O-rings 2 are respectively tensioned and connected in the two circular grooves 14, and the depth of the circular grooves 14 is greater than the thickness of the O-rings 2. A space for accommodating the capacitor core is formed between the two O-rings 2. The inner holes of the O-rings 2 are used to lead out the electrode terminals of the capacitor core.
[0014] When manufacturing this device, the aluminum shell 1 and the fins are integrally formed and produced by a die cold extrusion process. The obtained aluminum shell 1 blank is cut according to the required length, and then circular grooves 14 are drilled in both end ports of the aluminum shell 1, and then the aluminum shell 1 is put into a blackening tank for blackening treatment. When assembling the aluminum shell 1 and the capacitor core, the capacitor core is wound by a winding machine, and then a metal layer is sprayed on both end faces of the core to lead out the thin film electrode and serve as the welding platform for the external copper electrode. Large copper electrode terminals are welded at both ends of the sprayed metal layer by soldering. The welded core is installed in the aluminum shell 1, and the gap is filled with epoxy resin. Then the two O-rings 2 are respectively sleeved on the two electrode terminals of the capacitor core, and the O-rings 2 are pressed tightly in the circular grooves 14 to achieve leak prevention. Finally, glue is injected into the space in the circular grooves 14 not filled by the O-rings 2 to complete the sealing.
[0015] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. All any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. An aluminum shell for a capacitor with easy heat dissipation, characterized in that, It includes a cylindrical aluminum shell (1) and two O-rings (2). A number of heat dissipation fins (11) are evenly arranged on the outer peripheral wall of the aluminum shell (1). The two O-rings (2) are both tightly connected in the aluminum shell (1). A space for accommodating the capacitor core is formed between the two O-rings (2). The inner holes of the O-rings (2) are used to lead out the electrode terminals of the capacitor core.
2. The aluminum shell (1) of a capacitor with easy heat dissipation according to claim 1, characterized in that, Circular grooves (14) are opened in both end ports of the aluminum shell (1). The outer diameter of the circular groove (14) is larger than the inner diameter of the aluminum shell (1). The two O-rings (2) are respectively tightly connected in the two circular grooves (14). The depth of the circular groove (14) is larger than the thickness of the O-ring (2).
3. A heat-dissipating capacitor aluminum shell (1) according to claim 1, characterized in that, The heat dissipation fins (11) are parallel to the axis of the aluminum shell (1). Mounting posts (12) are connected to the outer sides of several of the heat dissipation fins (11). A number of the mounting posts (12) are evenly distributed around the axis of the aluminum shell (1). A mounting hole (13) parallel to the axis of the aluminum shell (1) is formed through the mounting post (12).