Film capacitor power-off protection structure

Abstract

The utility model discloses a film capacitor power-off protection structure, which comprises a shell installed on the outer side of a film capacitor, radiating fins are installed on the left side and the right side of the top of the shell, an installation cover is arranged on the rear side of the shell, a filter screen is arranged in an inner cavity of the installation cover, and connecting blocks are fixedly connected to the left side and the right side of the filter screen. The rotating rod, the fan and the motor are matched for use, so that heat in the inner cavity of the shell can be dissipated from the square groove formed in the mounting cover, then the rail, the sliding block and the connecting block are matched for use, the filter screen can be taken out from the inner cavity of the mounting cover, and the heat dissipation structure can be adopted; the aluminum shell of the thin film capacitor is high in heat conductivity, heat can be effectively dissipated, the fan forces air to flow, the heat dissipation effect is improved, the capacitor can be kept to work within a proper temperature range, and therefore the purposes of stabilizing the capacitance value and ensuring normal operation of a circuit are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic component processing, in particular to a power-off protection structure of a film capacitor. Background Art

[0002] Film capacitors use metal foil as electrodes, overlapping them with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate at both ends and then winding them into a cylindrical structure. Depending on the type of plastic film, they are also called polyethylene capacitors.

[0003] The dielectric of the film capacitor will produce a certain amount of loss under the action of the electric field. This loss is manifested in the form of heat energy, causing the capacitor to heat up or self-melt due to overheating. Moreover, when the ambient temperature is high, it is difficult for the capacitor to dissipate heat, which can easily lead to temperature rise, thereby exacerbating the self-heating phenomenon. Therefore, we need to design a power-off protection structure for the film capacitor and adopt a heat dissipation structure. The film capacitor is made of aluminum casing. The thermal conductivity of aluminum is high, which can effectively dissipate heat. The fan forces air flow to improve the heat dissipation effect, which can keep the capacitor working within a suitable temperature range, thereby stabilizing the capacitance value and ensuring the normal operation of the circuit. Utility Model Content

[0004] The purpose of the utility model is to provide a power-off protection structure for a film capacitor, which has the advantages of adopting a heat dissipation structure and using an aluminum shell for the film capacitor. The thermal conductivity of aluminum is high, which can effectively dissipate heat. The fan forces air flow to improve the heat dissipation effect, and can keep the capacitor working within a suitable temperature range, thereby stabilizing the capacitance value and ensuring the normal operation of the circuit, so as to solve the above-mentioned background technical problems.

[0005] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a power-off protection structure for a film capacitor, which includes a shell installed on the outside of the film capacitor, heat sinks installed on the left and right sides of the top of the shell, a mounting cover provided on the rear side of the shell, a filter provided in the inner cavity of the mounting cover, connecting blocks fixedly connected on the left and right sides of the filter, a fan installed in the inner cavity of the mounting cover, two motors installed on the rear side of the mounting cover, the output shaft of the motor passes through the inner cavity of the mounting cover and is fixedly connected to the rotating rod, the left and right sides of the rear side of the shell are fixedly connected to fixing plates, the rear side of the fixing plate is fixedly connected to an L-shaped block, the left and right sides of the mounting cover are fixedly connected to the mounting plates, the opposite sides of the two mounting plates are fixedly connected to a connecting column 1, the surface of the connecting column 1 is rotatably connected to the L-shaped plate, the rear side of the mounting cover is fixedly connected to a fixing shell, and the motor is fixedly installed in the inner cavity of the fixed shell.

[0006] Preferably, tracks are fixedly connected to the left and right sides of the bottom of the inner cavity of the mounting cover, and sliders are fixedly connected to the left and right sides of the bottom of the filter screen, and the sliders are slidably connected to the tracks.

[0007] Preferably, both left and right sides of the inner cavity of the film capacitor are fixedly connected with limiting grooves, and the limiting grooves are tightly fitted with the connecting block.

[0008] Preferably, a rotatable rotating rod is provided through the rear side of the inner cavity of the mounting cover, and the rotating rod is fixedly connected to the fan.

[0009] Preferably, a second connecting column is fixedly connected to the inner side of the L-shaped plate, and the second connecting column is adapted to the L-shaped block.

[0010] Preferably, two square grooves for hot air output are provided on the rear side of the mounting cover, and a long hole for a connecting column to pass through is provided on the surface of the L-shaped plate.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model uses a rotating rod, a fan and a motor in coordination so that the heat in the inner cavity of the shell can be dissipated from the square groove opened in the mounting cover. Then, the filter can be removed from the inner cavity of the mounting cover by using a track, a slider and a connecting block in coordination, thereby achieving a heat dissipation structure. The film capacitor uses an aluminum shell. Aluminum has a high thermal conductivity and can effectively dissipate heat. The fan forces air flow to improve the heat dissipation effect, which can keep the capacitor working within a suitable temperature range, thereby stabilizing the capacitance value and ensuring the normal operation of the circuit.

[0013] 2. The utility model uses the track and the slider in conjunction, so that the track guides the slider when the filter drives the slider to slide in the inner cavity of the track, ensuring that the slider will not deviate from its position when sliding in the inner cavity of the track, thereby improving the stability of the slider during use;

[0014] 3. The utility model sets the limit groove so that the connection blocks on the left and right sides of the filter are positioned in the groove of the limit groove. The limit groove plays a role in limiting the connection blocks, avoiding the phenomenon that the filter will tilt in the inner cavity of the installation cover, and improving the stability of the filter when in use;

[0015] 4. The utility model can promote the exchange of air between the inside and outside of the shell by setting the square groove on the mounting cover, so that hot air can be discharged faster and cold air can flow in more smoothly, which greatly enhances the air circulation speed, improves the heat dissipation efficiency, and can effectively reduce the temperature of the film capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or other advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings. These drawings are only illustrative and do not limit the present invention, wherein:

[0017] Figure 1 This is a schematic front view of an embodiment of the utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of a track and a filter screen according to an embodiment of the present invention;

[0019] Figure 3 This is a three-dimensional schematic diagram of an L-shaped block and an L-shaped plate according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the arrangement of a motor and a fixed housing according to an embodiment of the present utility model;

[0021] Figure 5 This is a three-dimensional schematic diagram of a rotating rod and a fan according to an embodiment of the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0023] 1. Film capacitor, 2. Housing, 3. Heat sink, 4. Mounting cover, 5. Track, 6. Filter, 7. Slider, 8. Limiting groove, 9. Connecting block, 10. Rotating rod, 11. Fan, 12. Motor, 13. Fixing plate, 14. L-shaped block, 15. Mounting plate, 16. Connecting column 1, 17. L-shaped plate, 18. Connecting column 2, 19. Fixing shell. DETAILED DESCRIPTION

[0024] Hereinafter, embodiments of the power-off protection structure of a thin film capacitor of the present invention will be described with reference to the accompanying drawings.

[0025] Figure 1-5The utility model shows a film capacitor power-off protection structure of an embodiment of the present invention, which includes a shell 2 installed on the outside of the film capacitor 1, heat sinks 3 are installed on the left and right sides of the top of the shell 2, a mounting cover 4 is provided on the rear side of the shell 2, a filter screen 6 is provided in the inner cavity of the mounting cover 4, and rails 5 are fixedly connected to the left and right sides of the bottom of the inner cavity of the mounting cover 4. Sliders 7 are fixedly connected to the left and right sides of the bottom of the filter screen 6. The sliders 7 are slidably connected to the rails 5. Through the coordinated use of the rails 5 and the sliders 7, the filter screen 6 drives the slider 7 to slide in the inner cavity of the rail 5, and the rails 5 play a guiding role on the slider 7. It proves that the slider 7 will not deviate from its position when sliding in the inner cavity of the track 5, thereby improving the stability of the slider 7 when in use. The left and right sides of the filter 6 are fixedly connected with connecting blocks 9, and the left and right sides of the inner cavity of the film capacitor 1 are fixedly connected with limiting grooves 8. The limiting grooves 8 are tightly fitted with the connecting blocks 9. Through the setting of the limiting grooves 8, the connecting blocks 9 on the left and right sides of the filter 6 are in the grooves of the limiting grooves 8. The limiting grooves 8 limit the connecting blocks 9, thereby avoiding the phenomenon that the filter 6 will tilt in the inner cavity of the installation cover 4, thereby improving the stability of the filter 6 when in use. The inner cavity of the installation cover 4 is installed with a fan 11, and the installation cover 4 is installed. A rotatable rotating rod 10 is provided on the rear side of the inner cavity, and the rotating rod 10 is fixedly connected to the fan 11. Two motors 12 are installed on the rear side of the mounting cover 4. The output shaft of the motor 12 passes through the inner cavity of the mounting cover 4 and is fixedly connected to the rotating rod 10. The left and right sides of the rear side of the outer shell 2 are fixedly connected with a fixing plate 13, and the rear side of the fixing plate 13 is fixedly connected with an L-shaped block 14. The left and right sides of the mounting cover 4 are fixedly connected with a mounting plate 15. The opposite sides of the two mounting plates 15 are fixedly connected with a connecting column 16. The surface of the connecting column 16 is rotatably connected to an L-shaped plate 17. The inner side of the L-shaped plate 17 is fixedly connected to the It is connected to a connecting column 2 18, which is compatible with the L-shaped block 14. The rear side of the mounting cover 4 is fixedly connected to a fixed shell 19, and the motor 12 is fixedly installed in the inner cavity of the fixed shell 19. The rear side of the mounting cover 4 is provided with two square grooves for outputting hot air. The surface of the L-shaped plate 17 is provided with a long hole for the connecting column 16 to pass through. The setting of the square groove on the mounting cover 4 can promote the exchange of air between the inside and outside of the shell 2, so that hot air can be discharged faster and cold air can flow in more smoothly, which greatly enhances the air circulation speed, improves the heat dissipation efficiency, and can effectively reduce the temperature of the film capacitor 1.

[0026] Working principle: When the present invention is used, the user drives the slider 7 to slide on the top of the track 5 by the filter 6, and then installs the connecting block 9 in the groove of the limit slot 8, so that the filter 6 will not deviate in direction, and then installs the mounting cover 4 on the rear side of the shell 2, and then rotates the L-shaped plate 17 on the surface of the connecting column 16, so that the connecting column 2 18 on the inner side of the L-shaped plate 17 will be stuck on one side of the L-shaped block 14, so that the mounting cover 4 will be fixed on the rear side of the shell 2, and then start the motor 12, and the output shaft of the motor 12 will drive the rotating rod 10 to rotate, and the fan 11 will rotate in the inner cavity of the mounting cover 4, so that the inside and outside air of the shell 2 can replace the air from the square groove opened in 4, and the heat sink 3 can absorb the heat emitted from the top of the film capacitor 1. Due to the setting of the filter 6, the filter 6 absorbs impurities when the fan 11 blows air, ensuring that dust does not enter the inner cavity of the shell 2, ensuring the cleanliness of the film capacitor 1, and finally effectively reducing the temperature of the film capacitor 1 and improving the service life of the film capacitor 1.

[0027] To sum up: the power-off protection structure of the film capacitor, through the coordinated use of the rotating rod 10, the fan 11 and the motor 12, allows the heat in the inner cavity of the shell 2 to be dissipated from the square groove opened in the mounting cover 4, and then through the coordinated use of the track 5, the slider 7 and the connecting block 9, the filter 6 can be taken out from the inner cavity of the mounting cover 4, so as to achieve the purpose of adopting a heat dissipation structure. The film capacitor adopts an aluminum shell. The thermal conductivity of aluminum is high, which can effectively dissipate heat. The fan forces air flow to improve the heat dissipation effect, which can keep the capacitor working within a suitable temperature range, thereby stabilizing the capacitance value and ensuring the normal operation of the circuit.

Claims

1. A film capacitor power-off protection structure, characterized in that: The invention comprises a shell (2) mounted on the outside of a film capacitor (1), heat sinks (3) are mounted on the left and right sides of the top of the shell (2), a mounting cover (4) is arranged on the rear side of the shell (2), a filter (6) is arranged in the inner cavity of the mounting cover (4), a connecting block (9) is fixedly connected to the left and right sides of the filter (6), a fan (11) is mounted in the inner cavity of the mounting cover (4), and two motors (12) are mounted on the rear side of the mounting cover (4), the output shaft of the motor (12) passes through the inner cavity of the mounting cover (4) and is fixed to the rotating rod (10). The left and right sides of the rear side of the housing (2) are fixedly connected with a fixing plate (13), the rear side of the fixing plate (13) is fixedly connected with an L-shaped block (14), the left and right sides of the mounting cover (4) are fixedly connected with a mounting plate (15), the opposite sides of the two mounting plates (15) are fixedly connected with a connecting column (16), the surface of the connecting column (16) is rotatably connected with an L-shaped plate (17), the rear side of the mounting cover (4) is fixedly connected with a fixing shell (19), and the motor (12) is fixedly mounted in the inner cavity of the fixing shell (19).

2. A film capacitor power-off protection structure according to claim 1, characterized in that: Tracks (5) are fixedly connected to the left and right sides of the bottom of the inner cavity of the mounting cover (4), and sliders (7) are fixedly connected to the left and right sides of the bottom of the filter screen (6), and the sliders (7) are slidably connected to the tracks (5).

3. A film capacitor power-off protection structure according to claim 2, characterized in that: The left and right sides of the inner cavity of the film capacitor (1) are both fixedly connected to limiting grooves (8), and the limiting grooves (8) are tightly fitted with the connecting blocks (9).

4. A film capacitor power-off protection structure according to claim 3, characterized in that: A rotatable rotating rod (10) is provided through the rear side of the inner cavity of the mounting cover (4), and the rotating rod (10) is fixedly connected to the fan (11).

5. The film capacitor power-off protection structure according to claim 4, characterized in that: A second connecting column (18) is fixedly connected to the inner side of the L-shaped plate (17), and the second connecting column (18) is adapted to the L-shaped block (14).

6. The film capacitor power-off protection structure according to claim 5, characterized in that: The rear side of the mounting cover (4) is provided with two square grooves for hot air output, and the surface of the L-shaped plate (17) is provided with a long hole for the connecting column (16) to pass through.

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