Heat dissipation type aluminum electrolytic capacitor

Abstract

The utility model relates to the technical field of aluminum electrolytic capacitors, in particular to a heat dissipation type aluminum electrolytic capacitor which comprises a shell, a plurality of arc-shaped second guide plates arranged at intervals are arranged on the side face of the shell, one side of each second guide plate faces the outer wall of the shell, and the other side of each second guide plate faces the outer wall of the shell. A plurality of spiral fins which are arranged at intervals are mounted on one side, close to the shell, of the second flow guide plate; the other side of the second flow guide plate is connected with an arc-shaped first flow guide plate which is tangent to the side edge of the second flow guide plate; the concave surface of the first flow guide plate is opposite to the concave surface of the second flow guide plate; the upper ends and the lower ends of the multiple first flow guide plates are connected through two arc-shaped plates correspondingly, and the arc-shaped plates coaxially correspond to each other. When the heat dissipation type aluminum electrolytic capacitor is used, the heat dissipation type aluminum electrolytic capacitor guides the flowing of external air through the flow guide plate, so that more air is gathered towards the fins, the contact efficiency of the air and the fins is improved, and the aluminum electrolytic capacitor has better heat dissipation performance.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum electrolytic capacitors, in particular to a heat-dissipating aluminum electrolytic capacitor. Background Technique

[0002] An aluminum electrolytic capacitor is made with an aluminum cylinder as the negative electrode, filled with a liquid electrolyte inside, and a bent aluminum strip inserted as the positive electrode. It also needs to be treated with a DC voltage to form an oxide film on the positive electrode sheet as the dielectric. Its characteristics are large capacitance, but large leakage current, poor stability, and positive and negative polarities. It is suitable for power supply filtering or low-frequency circuits.

[0003] When the existing aluminum electrolytic capacitor is working, heat is generated inside, which causes the internal air pressure of the capacitor to increase, affecting the electrical parameters of the capacitor and even causing the capacitor to burst and fail; and when the temperature is too high, the compensation ability of the capacitor also decreases, that is, the loss value of the capacitor increases, thereby reducing the service life of the capacitor. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above-mentioned disadvantages in the prior art, and to propose a heat-dissipating aluminum electrolytic capacitor.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: Design a heat-dissipating aluminum electrolytic capacitor, including a housing. On the side of the housing, there are a plurality of second flow guide plates arranged at intervals and in an arc shape. One side of the second flow guide plate faces the outer wall of the housing, and a plurality of fins arranged at intervals and in a spiral shape are installed on the side of the second flow guide plate close to the housing.

[0006] On the other side of the second flow guide plate, there is a first flow guide plate connected to its side tangent and in an arc shape. The concave surface orientation of the first flow guide plate is opposite to that of the second flow guide plate.

[0007] The upper and lower ends of the plurality of first flow guide plates are respectively connected by two arc-shaped plates, and the arc-shaped plates are coaxially corresponding. The ends of the two arc-shaped plates on the same first flow guide plate are both connected by connectors, and the opposite two connectors are fixedly connected, so that the fins are clamped and fixed on the housing.

[0008] Preferably, the connector includes a strip-shaped plate. The end of the strip-shaped plate is fixedly connected to the upper and lower arc-shaped plates, and fixing ears are also installed at the end of the strip-shaped plate. The two fixing ears close to each other are fixedly connected.

[0009] Preferably, an annular silicone grease gasket is sleeved on the outer side of the housing. The silicone grease gasket is installed on the housing and is placed between the housing and the fins.

[0010] Preferably, a heat shrinkable sleeve is also wrapped on the outer wall of the housing, and the edge of the heat shrinkable sleeve and the edge of the silicone grease gasket are staggered and overlapped, so that the heat shrinkable sleeve and the silicone grease gasket fully cover the outer wall of the housing.

[0011] Preferably, an element is provided inside the housing, a terminal is connected to the top of the element, a sealing cover plate is arranged inside the top of the housing, and the top of the terminal penetrates through the sealing cover plate.

[0012] Preferably, an explosion-proof hole is provided at the bottom of the housing, and an insulating gasket is installed on the explosion-proof hole.

[0013] The beneficial effects of the design scheme proposed by the present utility model in the application process are as follows:

[0014] 1. The heat dissipation type aluminum electrolytic capacitor guides and transfers the heat generated during the operation of the capacitor from the housing to the fins, and through the spiral arrangement of multiple fins, the contact surface between the fins and the outside air is increased, thereby accelerating the heat taken away by the contact between the air and the fins, and improving the heat dissipation efficiency of the capacitor.

[0015] 2. The heat dissipation type aluminum electrolytic capacitor is provided with a first guide plate and a second guide plate on the outside of the fins, so that the outside flowing air can flow along the side surfaces of the first guide plate and the second guide plate to the fins after contacting the first guide plate, thereby further improving the contact efficiency between the air and the fins and strengthening the heat dissipation effect of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present utility model;

[0017] Figure 2 is a structural diagram of the fins and the silicone grease gasket of the present utility model;

[0018] Figure 3 is a structural diagram of the fins of the present utility model;

[0019] Figure 4 is a structural diagram of the first guide plate and the second guide plate of the present utility model;

[0020] Figure 5 is a sectional structural diagram of the housing of the present utility model.

[0021] In the figure: 1. Housing; 2. Arc plate; 3. First guide plate; 4. Second guide plate; 5. Fins; 6. Strip plate; 7. Fixed ear; 8. Silicone grease gasket; 9. Element; 10. Terminal; 11. Sealing cover plate; 12. Insulating gasket; 13. Heat shrinkable sleeve; 14. Explosion-proof hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] 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.

[0023] Referring to Figures 1 - 5 , a heat-dissipating aluminum electrolytic capacitor includes a housing 1. Among them, an element 9 is provided inside the housing 1, a terminal 10 is connected to the top of the element 9, a sealing cover plate 11 is arranged inside the top of the housing 1, and the top of the terminal 10 penetrates through the sealing cover plate 11; an explosion-proof hole 14 is arranged at the bottom of the housing 1, and an insulating gasket 12 is installed on the explosion-proof hole 14, forming the internal structure of the capacitor. During actual use, in order to ensure the tightness of the sealing cover plate 11, when the capacitor is produced, the top port of the housing 1 is rolled, that is, as Figure 5 shown, the housing 1 is rolled into a curved shape that bends inward, and the side and top of the sealing cover plate 11 are limited and extruded, so as to ensure the stability and tightness of the sealing cover plate 11.

[0024] As Figure 1 and Figure 3 shown, a plurality of second flow guide plates 4 arranged at intervals and in an arc shape are provided on the side of the housing 1. One side of the second flow guide plate 4 faces the outer wall of the housing 1, and a plurality of fins 5 arranged at intervals and in a spiral shape are installed on the side of the second flow guide plate 4 close to the housing 1. The fins 5 will absorb the heat on the housing 1, thereby dissipating heat from the capacitor, and the spiral fins 5 can increase the contact surface between itself and the air, thereby improving the efficiency of heat transfer from the fins 5 to the air.

[0025] As Figure 1 and Figure 4 shown, a first flow guide plate 3 that is tangent to the side of the second flow guide plate 4 and in an arc shape is connected to the other side of the second flow guide plate 4. The concave surface orientation of the first flow guide plate 3 is opposite to the concave surface orientation of the second flow guide plate 4. A plurality of air inlet cavities arranged in a circumferential arrangement are formed outside the fins 5. When air passes through the capacitor, the air will be intercepted and guided by the first flow guide plate 3, so that the air flows along the arc surface of the first flow guide plate 3 towards the second flow guide plate 4, and then is guided by the second flow guide plate 4 to the fins 5, so that the air can fully contact the upper and lower surfaces of the fins 5 and can flow along the spiral direction of the fins 5, ensuring that more flowing air will contact the fins 5, thereby improving the heat dissipation effect of the capacitor.

[0026] Specifically, as Figure 1 and Figure 2As shown, an annular silicone grease gasket 8 is sleeved outside the housing 1. The silicone grease gasket 8 is installed on the housing 1 and is placed between the housing 1 and the fins 5. That is, the silicone grease gasket 8 wraps around the outer wall of the housing 1, and the fins 5 are in contact with the silicone grease gasket 8. Since the housing 1 of the aluminum electrolytic capacitor is an aluminum shell, it will absorb the heat generated during the operation of the capacitor. And the silicone grease gasket 8, as a heat transfer medium, will transfer the heat on the housing 1 to the fins 5, accelerating the heat transfer from the housing 1 to the fins 5. At this time, the flow of the air outside the capacitor will, while coming into contact with the capacitor, be introduced to the fins 5 through the flow guide plate. Thus, through the contact between the air and the fins 5 and the heat exchange with the fins 5, the heat dissipation operation of the capacitor is realized.

[0027] And because the housing 1 is made of aluminum, it has electrical conductivity. Therefore, as Figure 5 shown, a heat shrinkable sleeve 13 is also wrapped around the outer wall of the housing 1, and the edge of the heat shrinkable sleeve 13 and the edge of the silicone grease gasket 8 are staggered and overlapped, so that the heat shrinkable sleeve 13 and the silicone grease gasket 8 fully cover the outer wall of the housing 1. That is, the heat shrinkable sleeve 13 wraps around the part of the housing 1 except the position where the silicone grease gasket 8 is installed. And when installing the silicone grease gasket 8, the edges at the upper and lower ends of the silicone grease gasket 8 are both pressed on the heat shrinkable sleeve 13, thereby preventing the exposure of the housing 1.

[0028] When installing the fins 5, as Figure 1 and Figure 3 shown, the upper and lower ends of multiple first flow guide plates 3 are respectively connected by two arc-shaped plates 2, and the arc-shaped plates 2 are coaxially corresponding. The ends of the two arc-shaped plates 2 located on the same first flow guide plate 3 are both connected by connectors, and the opposite connectors are fixedly connected, so that the fins 5 are clamped and fixed on the housing 1. Among them, the connector includes a strip-shaped plate 6. The end of the strip-shaped plate 6 is fixedly connected to the upper and lower arc-shaped plates 2, and fixing ears 7 are also installed at the end of the strip-shaped plate 6. The two fixing ears 7 close to each other are fixedly connected, so that the fins 5 form two semi-circular plate-like structures, making the fins 5 wrap around the silicone grease gasket 8 in a cylindrical shape. Then, through the fixation of the fasteners (i.e., bolts or screws) on the fixing ears 7, the strip-shaped plate 6 is connected and fixed, which facilitates the installation and disassembly of the fins 5 and is convenient for subsequent operations such as the replacement of the silicone grease gasket 8.

[0029] It should be noted that the silicone grease gasket 8 has elasticity. When installing and fixing the fins 5 through fasteners, the elastic effect of the silicone grease gasket 8 will ensure the tight fit between the fins 5 and the silicone grease gasket 8, and at the same time, it will also generate a force on the fins 5 in the direction away from the housing 1, thereby playing a tensioning role in the fixation of the fasteners and further improving the fastening effect of the fasteners.

[0030] It should be noted that the arc-shaped plate 2 does not contact the fin 5, allowing air to flow in or out from the upper and lower ends of the position between the arc-shaped plate 2 and the housing 1, ensuring the air flow effect on the fin 5.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A heat dissipation aluminum electrolytic capacitor, comprising a housing (1), characterized in that: A plurality of second guide plates (4) arranged at intervals and in an arc shape are provided on the side of the outer shell (1); one side of the second guide plate (4) is arranged toward the outer wall of the outer shell (1); and a plurality of fins (5) arranged at intervals and in a spiral shape are installed on the side of the second guide plate (4) close to the outer shell (1); A first guide plate (3) tangential to the side edge of the second guide plate (4) and in an arc shape is connected to the other side of the second guide plate (4), and the concave surface of the first guide plate (3) faces in the opposite direction to the concave surface of the second guide plate (4); The upper and lower ends of the plurality of first guide plates (3) are respectively connected by two arc-shaped plates (2), and the arc-shaped plates (2) correspond to each other coaxially. The ends of the two arc-shaped plates (2) located on the same first guide plate (3) are connected by connecting pieces, and the two opposite connecting pieces are fixedly connected, so that the fins (5) are clamped and fixed on the outer shell (1).

2. The heat dissipating aluminum electrolytic capacitor according to claim 1, characterized in that: The connecting piece comprises a strip plate (6), the ends of which are fixedly connected to the arc-shaped plates (2) at the upper and lower ends, and fixing ears (7) are also installed on the ends of the strip plate (6), and two fixing ears (7) close to each other are fixedly connected.

3. The heat dissipating aluminum electrolytic capacitor according to claim 1, characterized in that: An annular silicone gasket (8) is sleeved on the outer side of the outer shell (1); the silicone gasket (8) is installed on the outer shell (1) and is placed between the outer shell (1) and the fin (5).

4. The heat dissipating aluminum electrolytic capacitor according to claim 3, characterized in that: A heat shrink tubing (13) is also wrapped around the outer wall of the housing (1), and the edge of the heat shrink tubing (13) and the edge of the silicone gasket (8) are stacked alternately, so that the heat shrink tubing (13) and the silicone gasket (8) fully cover the outer wall of the housing (1).

5. The heat dissipating aluminum electrolytic capacitor according to claim 1, characterized in that: An element (9) is provided inside the housing (1), a terminal (10) is connected to the top of the element (9), a sealing cover (11) is provided inside the top of the housing (1), and the top of the terminal (10) passes through the sealing cover (11).

6. The heat dissipating aluminum electrolytic capacitor according to claim 5, characterized in that: An explosion-proof hole (14) is provided at the bottom of the housing (1), and an insulating gasket (12) is installed on the explosion-proof hole (14).

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