Electrolytic capacitor assembly, frequency converter and electrical equipment

Abstract

The utility model discloses an electrolytic capacitor assembly, a frequency converter and electrical equipment, and relates to the technical field of electrolytic capacitors, and the electrolytic capacitor assembly comprises a support plate and a plurality of electrolytic capacitors. The supporting plate is provided with a first side and a second side, and a plurality of mounting holes are formed in the supporting plate; the plurality of electrolytic capacitors are correspondingly mounted in the plurality of mounting holes through sealing mounting structures, and one end of each electrolytic capacitor is exposed out of the first side of the supporting plate; at least one sealing installation structure comprises a support assembly, the support assembly comprises a supporting frame made of hard materials and a sealing ring made of elastic materials, the supporting frame is arranged in the installation hole in a sleeved mode, the middle of the supporting frame is provided with a via hole penetrating through the two ends of the supporting frame, the corresponding electrolytic capacitor extends out of the via hole, and the sealing ring is arranged between the via hole and the electrolytic capacitor. The technical scheme provided by the utility model aims to reduce the installation difficulty of simultaneously installing a plurality of electrolytic capacitors into a plurality of sealing rings at one time.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic capacitor technology, and in particular to an electrolytic capacitor assembly, a frequency converter, and electrical equipment. Background Technology

[0002] Due to their heat dissipation requirements, electrolytic capacitors on the inverter busbar typically need to be mounted and fixed within the inverter's air duct for effective heat dissipation. Dust from the air duct side can often enter the mounting cavity of the high and low voltage electronic components, causing insufficient electrical clearance and potentially leading to arcing and other safety issues. To address this, existing technology employs a rubber ring sealing structure. However, as the number of electrolytic capacitors increases, multiple capacitors need to be installed into multiple sealing rings simultaneously, increasing the dimensional tolerance requirements and creating installation difficulties. Utility Model Content

[0003] The main purpose of this invention is to provide an electrolytic capacitor assembly, frequency converter, and electrical equipment, which aims to reduce the installation difficulty of simultaneously installing multiple electrolytic capacitors into multiple sealing rings.

[0004] To achieve the above objectives, this utility model proposes an electrolytic capacitor assembly for use in a frequency converter, the electrolytic capacitor assembly comprising:

[0005] A support plate is provided inside the housing of the frequency converter and has a first side and a second side, wherein the first side of the support plate is oriented toward the air duct formed inside the housing, and the support plate is provided with a plurality of mounting holes.

[0006] Multiple electrolytic capacitors are mounted in multiple mounting holes via a sealed mounting structure to seal and separate the mounting holes, and one end of each electrolytic capacitor is exposed on the first side of the support plate for heat dissipation at the air duct on the first side of the support plate.

[0007] At least one of the sealing installation structures includes a bracket assembly, the bracket assembly including a support frame made of rigid material and a sealing ring made of elastic material, the support frame being sleeved in the mounting hole, the support frame having a through hole in the middle of its middle portion extending through both ends thereto, the corresponding electrolytic capacitor extending out from the through hole, and the sealing ring being disposed between the through hole and the electrolytic capacitor.

[0008] In one embodiment, the support frame has a first end corresponding to a first side of the support plate and a second end corresponding to a second side of the support plate, the first end of the support frame extending from the first side of the support plate.

[0009] In one embodiment, the support frame has a first end corresponding to a first side of the support plate and a second end corresponding to a second side of the support plate;

[0010] The second end of the support frame extends laterally into a support portion, which is supported on the second side of the support plate.

[0011] In one embodiment, the side of the support portion facing the support plate is attached to the second side of the support plate.

[0012] In one embodiment, an installation structure is provided between the support portion and the support plate. The installation structure includes a snap fastener and a socket that engages with the snap fastener, one of which is disposed on the support portion and the other on the support plate.

[0013] In one embodiment, the support frame is made of plastic.

[0014] In one embodiment, the inner wall of the via is provided with an annular mounting groove;

[0015] The sealing ring is partially embedded in the annular mounting groove.

[0016] In one embodiment, an electrode is provided at the end of each electrolytic capacitor furthest from the air duct;

[0017] The electrolytic capacitor assembly also includes a circuit board, which is disposed on the second side of the support plate and is electrically connected to the electrodes of the plurality of electrolytic capacitors.

[0018] This utility model also proposes a frequency converter, including an electrolytic capacitor assembly, wherein the electrolytic capacitor assembly includes:

[0019] A support plate is provided inside the housing of the frequency converter and has a first side and a second side, wherein the first side of the support plate is oriented toward the air duct formed inside the housing, and the support plate is provided with a plurality of mounting holes.

[0020] Multiple electrolytic capacitors are mounted in multiple mounting holes via a sealed mounting structure to seal and separate the mounting holes, and one end of each electrolytic capacitor is exposed on the first side of the support plate for heat dissipation at the air duct on the first side of the support plate.

[0021] At least one of the sealing installation structures includes a bracket assembly, the bracket assembly including a support frame made of rigid material and a sealing ring made of elastic material, the support frame being sleeved in the mounting hole, the support frame having a through hole in the middle of its middle portion extending through both ends thereto, the corresponding electrolytic capacitor extending out from the through hole, and the sealing ring being disposed between the through hole and the electrolytic capacitor.

[0022] This utility model also proposes an electrical device, including a frequency converter, wherein the frequency converter includes an electrolytic capacitor assembly, and the electrolytic capacitor assembly includes:

[0023] A support plate is provided inside the housing of the frequency converter and has a first side and a second side, wherein the first side of the support plate is oriented toward the air duct formed inside the housing, and the support plate is provided with a plurality of mounting holes.

[0024] Multiple electrolytic capacitors are mounted in multiple mounting holes via a sealed mounting structure to seal and separate the mounting holes, and one end of each electrolytic capacitor is exposed on the first side of the support plate for heat dissipation at the air duct on the first side of the support plate.

[0025] At least one of the sealing installation structures includes a bracket assembly, the bracket assembly including a support frame made of rigid material and a sealing ring made of elastic material, the support frame being sleeved in the mounting hole, the support frame having a through hole in the middle of its middle portion extending through both ends thereto, the corresponding electrolytic capacitor extending out from the through hole, and the sealing ring being disposed between the through hole and the electrolytic capacitor.

[0026] In the technical solution of this utility model, a support plate installed inside the inverter housing provides a first side facing the air duct and a second side facing away from the air duct. The support frame is positioned within mounting holes on the support plate, and the through-holes on the support frame allow the electrolytic capacitor to pass through, enabling the portion of the electrolytic capacitor exposed on the first side of the support plate to contact the air duct. The rapidly flowing gas within the air duct provides heat dissipation and cooling for the electrolytic capacitor. A sealing ring made of elastic material is positioned between the through-hole of the support frame and the electrolytic capacitor, filling the gap between them. This prevents impurities in the air duct from entering the second side of the support plate through the through-hole, protecting high and low voltage electronic components from contamination.

[0027] Furthermore, since the support frame is made of rigid material, when installing multiple electrolytic capacitors at once, it is easier to align the multiple electrolytic capacitors with the corresponding through holes on the support frame. The rigid material support frame can withstand the pressure applied during installation, reducing positional deviations caused by material deformation or flexibility, thus ensuring that each electrolytic capacitor can be accurately inserted into the sealing ring, thereby reducing the difficulty of installation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the electrolytic capacitor assembly provided by this utility model;

[0030] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0031] Figure 3 for Figure 1 A magnified view of a section at point B in the middle.

[0032] Explanation of icon numbers:

[0033] 100. Electrolytic capacitor assembly;

[0034] 1. Support plate; 11. First side; 12. Second side; 13. Air duct; 14. Mounting hole;

[0035] 2. Electrolytic capacitor; 21. Electrode;

[0036] 3. Sealed mounting structure; 31. Bracket assembly; 311. Support frame; 3111. Through hole; 3112. First end; 3113. Second end; 3114. Annular mounting groove; 3115. Support part; 312. Sealing ring;

[0037] 4. Circuit board.

[0038] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0040] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] Due to their heat dissipation requirements, electrolytic capacitors on the inverter busbar typically need to be mounted and fixed within the inverter's air duct for effective heat dissipation. Dust from the air duct side can often enter the mounting cavity of the high and low voltage electronic components, causing insufficient electrical clearance and potentially leading to arcing and other safety issues. To address this, existing technology employs a rubber ring sealing structure. However, as the number of electrolytic capacitors increases, multiple capacitors need to be installed into multiple sealing rings simultaneously, increasing the dimensional tolerance requirements and creating installation difficulties.

[0043] To solve the above technical problems, such as Figures 1 to 3 As shown, this utility model proposes an electrolytic capacitor assembly 100 for use in a frequency converter. The electrolytic capacitor assembly 100 includes a support plate 1 and multiple electrolytic capacitors 2. Figure 1(Only one of the electrolytic capacitors 2 is shown as an example). A support plate 1 is disposed within the housing of the frequency converter and has a first side 11 and a second side 12. The first side 11 of the support plate 1 faces the air duct 13 formed within the housing. The support plate 1 has a plurality of mounting holes 14. A plurality of electrolytic capacitors 2 are correspondingly mounted in the plurality of mounting holes 14 through a sealing mounting structure 3 to seal and space the mounting holes 14. One end of each electrolytic capacitor 2 is exposed on the first side 11 of the support plate 1 for heat dissipation at the air duct 13 on the first side 11 of the support plate 1. At least one of the sealing mounting structures 3 includes a bracket assembly 31. The bracket assembly 31 includes a support frame 311 made of rigid material and a sealing ring 312 made of elastic material. The support frame 311 is fitted into the mounting holes 14. The middle of the support frame 311 has a through hole 3111 extending through both ends. The corresponding electrolytic capacitor 2 extends out from the through hole 3111. The sealing ring 312 is disposed between the through hole 3111 and the electrolytic capacitor 2.

[0044] In the technical solution of this utility model, a support plate 1 is installed inside the inverter housing, so that the support part 3115 has a first side 11 facing the air duct 13 and a second side 12 facing away from the air duct 13. By setting the support frame 311 in the mounting hole 14 on the support plate 1, the through hole 3111 on the support frame allows the electrolytic capacitor 2 to pass through, so that the part of the electrolytic capacitor 2 exposed on the first side 11 of the support plate 1 can contact the air duct 13, and the rapidly flowing gas in the air duct 13 can achieve heat dissipation and cooling of the electrolytic capacitor 2. Because the sealing ring 312 made of elastic material is set between the through hole 3111 of the support frame and the electrolytic capacitor 2, the gap between the through hole 3111 and the electrolytic capacitor 2 is filled by the sealing ring 312, so that impurities in the air duct 13 will not enter the second side 12 of the support plate 1 through the through hole, thus protecting the high and low voltage electronic components from contamination.

[0045] Furthermore, since the support frame 311 is made of rigid material, when installing multiple electrolytic capacitors 2 at once, it is easier to align the multiple electrolytic capacitors 2 with the corresponding through holes 3111 on the support frame 311. The rigid material of the support frame can withstand the pressure applied during installation, reducing positional deviations caused by material deformation or flexibility, ensuring that each electrolytic capacitor 2 can be accurately inserted into the sealing ring 312, thereby reducing the difficulty of installation. Alternatively, all sealing installation structures can be configured as support assemblies, or only some of the sealing installation structures can be configured as support assemblies.

[0046] It is understood that the depth of the mounting hole 14 is determined by the distance between the first side 11 and the second side 12 of the support plate 1. By rationally designing the structure and material selection of the support plate 1, its thickness can be reduced as much as possible while ensuring sufficient mechanical strength. A thinner support plate 1 not only reduces the overall weight of the frequency converter but also reduces the cost of the required materials. However, the mounting hole 14 formed by a thinner support plate 1 is shallower. When the first end 3112 of the support frame 311 is located in the mounting hole 14, the length of the through hole 3111 will be reduced after the sealing ring 312 is installed. That is, the portion of the support frame 311 used to guide the installation of the electrolytic capacitor 2 is reduced, which is not conducive to installation. Therefore, in one embodiment, the support frame 311 has a first end 3112 corresponding to the first side 11 of the support plate 1 and a second end 3113 corresponding to the second side 12 of the support plate 1, with the first end 3112 of the support frame 311 extending from the first side 11 of the support plate 1. In this way, by extending the first end 3112 of the support frame 311 from the first side 11 of the support plate 1, the length of the through hole 3111 can be extended. This not only increases the portion of the support frame 311 used to guide the electrolytic capacitors 2, but also reduces the installation difficulty of simultaneously installing multiple electrolytic capacitors 2 into multiple sealing rings 312. Furthermore, it is worth mentioning that, due to the increased length of the through hole 3111, not only can the position of the sealing rings 312 on the inner wall of the through hole 3111 be adjusted, but also additional sealing structures can be provided, such as filling with sealant, or having multiple sealing rings 312 on the inner wall of the through hole 3111.

[0047] It is understood that the support plate 1 is fitted into the mounting hole 14 of the support plate 1 and can be connected by adhesive or snap-fit. In one embodiment, the support frame 311 has a first end 3112 corresponding to the first side 11 of the support plate 1 and a second end 3113 corresponding to the second side 12 of the support plate 1; the second end 3113 of the support frame 311 extends laterally into a support portion 3115, which supports the second side 12 of the support plate 1. In this way, the support portion 3115 extending laterally from the second end 3113 of the support frame 311, which supports the second side 12 of the support plate 1, provides additional mechanical support, reduces the loosening or displacement of the support frame 311 and the electrolytic capacitor 2, and improves the stability and vibration resistance of the connection. In this embodiment, the support portion 3115 can be connected to the second side 12 of the support plate 1 on one side facing the support plate 1, or the entire support portion 3115 can be connected to the second side 12 of the support plate 1 on one side facing the support plate 1. Specifically, in one embodiment, the support portion 3115 is attached to the second side 12 of the support plate 1 on one side facing the support plate 1. This arrangement increases the contact area between the support portion 3115 and the second side 12 of the support plate 1, providing stronger mechanical support and enhancing the stability and vibration resistance of the entire structure. Furthermore, the close fit between the support portion 3115 and the support plate 1 prevents the mounting holes 14 on the support plate 1 from communicating with the gap between the support portion 3115 and the second side 12 of the support plate 1, thus preventing impurities from the air duct 13 side from entering the second side 12 of the support plate 1 and thus avoiding contamination of the high and low voltage electronic devices mounted thereon. An installation structure (not shown in the figures) is provided between the support part 3115 and the support plate 1. This installation structure can be an adhesive such as glue or tape; a fastener such as a screw or nut; or a snap-fit ​​assembly. Therefore, in one embodiment, the installation structure includes a snap-fit ​​and a socket that mates with the snap-fit, one of which is located on the support part 3115 and the other on the support plate 1. This allows for quick connection of the support part 3115 and the support plate 1, improving production efficiency. The snap-fit ​​has a certain elastic deformation capability, allowing for slight deformation when inserted into the socket, and automatically returning to its original position and locking in place. The socket (usually a groove or hole) is used to accommodate and support the snap-fit.

[0048] It is understood that the support frame 311 is made of a rigid material, such as plastic, metal, ceramic, or composite material. In one embodiment, the support frame 311 is made of plastic. This ensures the strength of the support frame 311 and reduces unnecessary friction and pressure when in contact with the electrolytic capacitor 2, protecting the electrolytic capacitor 2 from mechanical damage. Furthermore, plastic material has good insulation properties, effectively preventing the risk of short circuits. In addition, it is worth mentioning that plastic materials are generally lightweight and easy to process into various shapes to meet different installation requirements.

[0049] To facilitate the installation of the sealing ring 312 onto the inner wall of the through hole 3111, in one embodiment, an annular mounting groove 3114 is provided on the inner wall of the through hole 3111; the sealing ring 312 is partially embedded in the annular mounting groove 3114. This arrangement provides an installation position for the sealing ring 312 through the annular mounting groove 3114, preventing the sealing ring 312 from easily shifting or rotating during assembly. This simplifies the assembly process and improves assembly consistency and reliability. Furthermore, after the sealing ring 312 is partially embedded in the annular mounting groove 3114, it receives additional support, preventing it from shifting or falling off due to vibration or other external forces during use. This structure enhances the stability of the sealing ring 312, thereby ensuring a long-term reliable sealing effect.

[0050] In one embodiment, each electrolytic capacitor 2 has an electrode 21 at the end furthest from the air duct 13; the electrolytic capacitor assembly 100 also includes a circuit board 4, which is disposed on the second side 12 of the support plate 1, and is electrically connected to the electrodes 21 of the plurality of electrolytic capacitors 2. This arrangement securely connects the electrodes 21 of the electrolytic capacitors 2 to the air duct 13 via solder joints or other fixing means on the circuit board 4. Simultaneously, since the circuit board 4 is connected to the second side 12 of the support plate 1, the movement of the electrolytic capacitors 2 within the via 3111 is reduced, thereby reducing the contact between the electrolytic capacitors 2 and the support frame 311, reducing friction and collision frequency, and thus extending the service life of the electrolytic capacitors 2.

[0051] This utility model also proposes a frequency converter, which includes an electrolytic capacitor assembly 100. The specific structure of the electrolytic capacitor assembly 100 is as described in the above embodiments. Since this frequency converter adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0052] This utility model also proposes an electrical device, which includes a frequency converter. The specific structure of the frequency converter is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0053] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electrolytic capacitor assembly used in a frequency converter, characterized in that, The electrolytic capacitor assembly includes: A support plate is provided inside the housing of the frequency converter and has a first side and a second side, wherein the first side of the support plate is oriented toward the air duct formed inside the housing, and the support plate is provided with a plurality of mounting holes. Multiple electrolytic capacitors are mounted in multiple mounting holes via a sealed mounting structure to seal and separate the mounting holes, and one end of each electrolytic capacitor is exposed on the first side of the support plate for heat dissipation at the air duct on the first side of the support plate. At least one of the sealing installation structures includes a bracket assembly, the bracket assembly including a support frame made of rigid material and a sealing ring made of elastic material, the support frame being sleeved in the mounting hole, the support frame having a through hole in the middle of its middle portion extending through both ends thereto, the corresponding electrolytic capacitor extending out from the through hole, and the sealing ring being disposed between the through hole and the electrolytic capacitor.

2. The electrolytic capacitor assembly as described in claim 1, characterized in that, The support frame has a first end corresponding to a first side of the support plate and a second end corresponding to a second side of the support plate, with the first end of the support frame extending from the first side of the support plate.

3. The electrolytic capacitor assembly as described in claim 1, characterized in that, The support frame has a first end corresponding to a first side of the support plate and a second end corresponding to a second side of the support plate; The second end of the support frame extends laterally into a support portion, which is supported on the second side of the support plate.

4. The electrolytic capacitor assembly as described in claim 3, characterized in that, The side of the support portion facing the support plate is attached to the second side of the support plate.

5. The electrolytic capacitor assembly as described in claim 3, characterized in that, An installation structure is provided between the support part and the support plate. The installation structure includes a buckle and a socket that cooperates with the buckle, one of which is provided on the support part and the other is provided on the support plate.

6. The electrolytic capacitor assembly as described in claim 1, characterized in that, The support frame is made of plastic.

7. The electrolytic capacitor assembly as described in claim 1, characterized in that, The inner wall of the via is provided with an annular mounting groove; The sealing ring is partially embedded in the annular mounting groove.

8. The electrolytic capacitor assembly as described in claim 1, characterized in that, Each of the electrolytic capacitors has an electrode at the end furthest from the air duct; The electrolytic capacitor assembly also includes a circuit board, which is disposed on the second side of the support plate and is electrically connected to the electrodes of the plurality of electrolytic capacitors.

9. A frequency converter, characterized in that, Includes the electrolytic capacitor assembly as described in any one of claims 1 to 8.

10. An electrical appliance, characterized in that, Including the frequency converter as described in claim 9.

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