Explosion-proof film capacitor

Abstract

The utility model discloses an explosion-proof film capacitor, and relates to the technical field of film capacitors. The electrode plate comprises an electrode plate body, two outgoing lines are arranged on the electrode plate body, two shells distributed in a mirror image mode are arranged outside the electrode plate body in a sleeved mode, the two outgoing lines penetrate through the shells located below, plastic plates are fixedly installed on the left side and the right side of each shell, and every two adjacent plastic plates are fixed through welding. According to the utility model, if the film capacitor operates for a long time, the temperature of the electrode plates rises gradually and is not within a safe range, more hot air flows are generated in the two shells, and when the hot air flows in the two shells reach a certain degree, the hot air flows break through the explosion-proof films respectively, so that the explosion-proof films are prevented from being damaged. And the plastic plate is made of a plastic material and has certain flexibility, so that the plastic plate can deform when being impacted, hot air flow in the two shells can be conveniently discharged, and the hot air flow in the two shells can be timely discharged, so that the explosion-proof effect can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film capacitor technical field, concretely relates to an explosion -proof thin film capacitor. BACKGROUND

[0002] Thin film capacitor is with metal foil as electrode, it is overlapped from two ends with polyethylene, polypropylene, polystyrene or polycarbonate plastic film and is coiled into cylindrical capacitor, according to the type of plastic film, thin film capacitor is also divided into polyethylene capacitor (also called Mylar capacitor), polypropylene capacitor (also called PP capacitor), polystyrene capacitor (also called PS capacitor) and polycarbonate capacitor.

[0003] The existing thin film capacitor may swell due to temperature rise after long-term use, and if the swelling continues, explosion is easily caused, however, the explosion-proof performance of the thin film capacitor on the market is poor, and therefore an explosion-proof thin film capacitor is proposed. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of explosion-proof thin film capacitors to solve the problem that the explosion-proof performance of the thin film capacitor on the market is poor.

[0005] The utility model discloses the following technical solutions to achieve the above-mentioned purposes specifically:

[0006] An explosion-proof thin film capacitor, comprising an electrode plate, two lead-out wires are provided on the electrode plate, two mirror image distributed housings are provided outside the electrode plate, the two lead-out wires all penetrate the lower housing, plastic plates are fixedly installed on the left and right sides of each housing, each two adjacent plastic plates are fixed by welding, a cross-shaped slot is formed in the side wall of each plastic plate, an explosion-proof film is movably installed in each cross-shaped slot, and a heat dissipation assembly for facilitating heat dissipation is provided on each housing.

[0007] Further, the heat dissipation assembly comprises a window, a window is formed in the front and rear walls of each housing, a heat dissipation plate is fixedly installed in each window, the heat dissipation plate is made of ceramic material, and the heat dissipation plate is in abutting arrangement with the electrode plate.

[0008] Further, the heat dissipation assembly further comprises heat dissipation holes, a plurality of heat dissipation holes are formed in the side wall of each housing, and a plurality of horizontally equidistantly distributed arc-shaped frames are fixedly installed in the interior of each housing.

[0009] Further, the heat dissipation assembly further comprises a protective net, a protective net is fixedly installed in each heat dissipation hole, and the protective net is a metal mesh structure.

[0010] Further, two lower plastic plates are provided with two clamping grooves respectively on the side away from the electrode plate, and a clamping block is movably installed in each clamping groove.

[0011] Further, two upper plastic plates are provided with a support rod respectively on the side close to the electrode plate, and a positioning rod is fixedly installed on the end of each support rod close to the electrode plate, and the positioning rod is in abutment with the electrode plate.

[0012] The utility model discloses the following beneficial effects:

[0013] 1, the utility model discloses first install the film capacitor to the circuit board specified position, when the film capacitor is in operation, because each shell is provided with the heat dissipation component that is convenient for heat dissipation, and the heat dissipation component can effectively absorb the heat generated when the electrode plate is in operation, and the internal airflow of shell and the outside cold air are interchanged, thereby effectively cooling the electrode plate, but if the film capacitor long -time operation electrode plate's temperature gradually increases and is not in the safe range, the internal of two shells will produce more hot air current, when the hot air current in the internal of two shells reaches a certain degree, and the hot air current will break through the explosion -proof membrane respectively, and because the plastic plate is the plastic material composition and has certain flexibility, so the plastic plate can produce deformation when being impacted, so that the hot air current in the internal of two shells is discharged, and the hot air current in the internal of two shells can be discharged in time and can reach the explosion -proof effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0015] Figure 2 It is the explosion schematic diagram of the utility model;

[0016] Figure 3 It is the side plate sectional view of the utility model;

[0017] Reference signs: 1, electrode plate;2, lead-out wire;3, shell;4, plastic plate;5, cross joint;6, explosion -proof membrane;7, heat dissipation component;701, window;702, heat dissipation plate;703, heat dissipation hole;704, arc-shaped frame;705, protective net;8, clamping groove;9, clamping block;10, support rod;11, positioning rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0020] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or position relationships shown in the drawings, or the directions or position relationships in which the product of the present application is usually placed, which are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular direction, be constructed and operated in a particular direction, therefore, cannot be understood as a limitation on the present application.

[0022] As Figures 1 to 3As shown in the figure, an explosion-proof thin film capacitor includes an electrode plate 1, two lead-out wires 2 are arranged on the electrode plate 1, the electrode plate 1 is sleeved with two mirror image distributed housings 3, the two lead-out wires 2 all penetrate the lower housing 3, the left and right sides of each housing 3 are fixedly installed with plastic plates 4, each adjacent two plastic plates 4 are fixed by welding, the side wall surface of each plastic plate 4 is provided with a cross-shaped slot 5, the inside of each cross-shaped slot 5 is movably installed with an explosion-proof film 6, each housing 3 is provided with a heat dissipation assembly 7 for facilitating heat dissipation. It needs to be explained that first, the thin film capacitor is installed on the designated position of the circuit board, when the thin film capacitor is running, since each housing 3 is provided with the heat dissipation assembly 7 for facilitating heat dissipation, the heat dissipation assembly 7 can effectively absorb the heat generated by the electrode plate 1 when running, and make the internal airflow of the housing 3 intercommunicate with the external cold air, thereby effectively cooling the electrode plate 1, but if the temperature of the electrode plate 1 gradually rises when the thin film capacitor runs for a long time and is not within the safe range, more hot air will be generated in the interiors of the two housings 3, when the hot air in the interiors of the two housings 3 reaches a certain degree, the hot air will break through the explosion-proof films 6 respectively, and since the plastic plates 4 are made of plastic material and have a certain flexibility, the plastic plates 4 can deform when impacted, so as to facilitate the discharge of the hot air in the interiors of the two housings 3, and the hot air in the interiors of the two housings 3 can be discharged in time to achieve the explosion-proof effect.

[0023] As shown in the figure, Figure 1 , Figure 2 The heat dissipation assembly 7 includes a window 701, the front and rear wall surfaces of each housing 3 are provided with the window 701, the inside of each window 701 is fixedly installed with a heat dissipation plate 702, the heat dissipation plate 702 is made of ceramic material, and the heat dissipation plate 702 is arranged in abutment with the electrode plate 1. It needs to be explained that since the heat dissipation plate 702 is made of ceramic material and is arranged in abutment with the electrode plate 1, the ceramic material has good heat conduction performance and insulation performance, so the heat dissipation plate 702 can effectively absorb the heat on the electrode plate 1 for heat dissipation treatment.

[0024] As shown in the figure, Figure 1 , Figure 2 The heat dissipation assembly 7 also includes heat dissipation holes 703, the side wall surface of each housing 3 is provided with a plurality of heat dissipation holes 703, the inside of each housing 3 is fixedly installed with a plurality of horizontally equidistantly distributed arc-shaped frames 704. It needs to be explained that the hot air in the interior of the housing 3 can be discharged through the heat dissipation holes 703, and the external cold air can be injected into the interior of the housing 3 through the heat dissipation holes 703. The cold air can help stabilize the temperature of the electrode plate 1 in the running state, and the arc-shaped frame 704 can act to make there be a certain gap space between the housing 3 and the electrode plate 1, which can facilitate the discharge of hot air and the injection of cold air.

[0025] AsFigure 1 、 Figure 2 As shown in the drawings, the heat dissipation assembly 7 further comprises a protective net 705, and the inside of each heat dissipation hole 703 is fixedly installed with the protective net 705. The protective net 705 is a metal mesh structure. It needs to be noted that the protective net 705 plays a protective role in cooperation with the shell 3 and the plastic plate 4 to the maximum extent without affecting the airflow flow.

[0026] As shown in the drawings, Figure 1 、 Figure 2 The lower two plastic plates 4 are respectively provided with two clamping grooves 8 away from the electrode plate 1. The inside of each clamping groove 8 is movably installed with a clamping block 9. Each clamping block 9 is fixedly connected with the upper adjacent plastic plate 4. It needs to be noted that when the two shells 3 are assembled, each clamping groove 8 is placed in the inside of the corresponding clamping block 9, and then each adjacent two plastic plates 4 are welded and fixed. Through the cooperation of the clamping groove 8 and the clamping block 9, the two shells 3 can be quickly positioned when assembled.

[0027] As shown in the drawings, Figure 1 、 Figure 2 Figure 1 Figure 2 The upper two plastic plates 4 are respectively fixedly installed with a support rod 10 close to the electrode plate 1. The end of each support rod 10 close to the electrode plate 1 is fixedly installed with a positioning rod 11. The positioning rod 11 is in abutment with the electrode plate 1. It needs to be noted that when the electrode plate 1 is placed in the middle of the two shells 3, the positioning rod 11 can avoid the left and right displacement of the electrode plate 1.

[0028] In summary:

[0029] First, the film capacitor is installed on the designated position of the circuit board. When the film capacitor is running, since each shell 3 is provided with a heat dissipation assembly 7 for easy heat dissipation, the heat dissipation assembly 7 can effectively absorb the heat generated by the electrode plate 1 when running, and make the internal airflow of the shell 3 intercommunicate with the external cold air, thereby effectively cooling the electrode plate 1. However, if the temperature of the electrode plate 1 gradually rises when the film capacitor runs for a long time and is not within the safe range, more hot air will be generated in the inside of the two shells 3. When the hot air in the inside of the two shells 3 reaches a certain degree, the hot air will break through the explosion-proof membrane 6, and since the plastic plate 4 is made of plastic material and has a certain flexibility, the plastic plate 4 can deform when impacted, so as to facilitate the discharge of the hot air in the inside of the two shells 3. The hot air in the inside of the two shells 3 can be discharged in time to achieve the explosion-proof effect.

[0030] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof film capacitor, characterized by comprising: The utility model provides an electrode plate and heat dissipation assembly, and the utility model relates to electrode plate and heat dissipation assembly.

2. The explosion-proof film capacitor of claim 1, wherein The heat dissipation assembly (7) includes a window (701), the front and rear wall surfaces of each shell (3) are provided with the window (701), the inner side of each window (701) is fixedly installed with a heat dissipation plate (702), the heat dissipation plate (702) is made of ceramic material, and the heat dissipation plate (702) is arranged in close contact with the electrode plate (1).

3. The explosion-proof film capacitor of claim 2, wherein The heat dissipation assembly (7) further includes a heat dissipation hole (703), the side wall surface of each shell (3) is provided with a plurality of heat dissipation holes (703), and a plurality of arc-shaped frames (704) are fixedly installed in the inside of each shell (3) and are distributed transversely and equidistantly.

4. The explosion-proof film capacitor of claim 3, wherein The heat dissipation assembly (7) further includes a protective net (705), and the inside of each heat dissipation hole (703) is fixedly installed with the protective net (705), and the protective net (705) is a metal mesh structure.

5. The explosion-proof film capacitor of claim 1, wherein The side, away from the electrode plate (1), of the two plastic plates (4) located below is respectively provided with two clamping grooves (8), the inside of each clamping groove (8) is movably installed with a clamping block (9), and each clamping block (9) is fixedly connected with the adjacent plastic plate (4) above.

6. The explosion-proof film capacitor of claim 1, wherein The side, close to the electrode plate (1), of the two plastic plates (4) located above is respectively fixedly installed with a supporting rod (10), and the end, close to the electrode plate (1), of each supporting rod (10) is fixedly installed with a positioning rod (11), and the positioning rod (11) is arranged in close contact with the electrode plate (1).

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